Allow extensions to declare dependencies (npm, cordova...) and custom properties in the project (#1717)

Only show in developer changelog
2026-10-12 02:02:42 +00:00 · 2020-08-24 20:51:10 +01:00
parent 20392d6a79
commit cafa0d512f
33 changed files with 3296 additions and 2036 deletions
@@ -0,0 +1,103 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival ([email protected]). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef DEPENDENCYMETADATA_H
+#define DEPENDENCYMETADATA_H
+#include <map>
+
+#include "GDCore/Project/PropertyDescriptor.h"
+#include "GDCore/String.h"
+#include "GDCore/Tools/Log.h"
+
+namespace gd {
+/**
+ * \brief Contains information about a dependency (library, npm/cordova
+ * package, or other according to the export) of an extension.
+ */
+class GD_CORE_API DependencyMetadata {
+ public:
+  /**
+   * \brief Sets the name shown to users.
+   */
+  DependencyMetadata& SetName(const gd::String& name_) {
+    name = name_;
+    return *this;
+  };
+
+  /**
+   * \brief Sets the name written by the exporter.
+   * Typically, this is what is used by the dependency manager
+   * to find the dependency.
+   *
+   * \example
+   * \code
+   *  // For depending upon the NPM package is-thirteen
+   *  gd::DependencyMetadata dependencyMetadata = gd::DependencyMetadata();
+   *  dependencyMetadata.setExporterName("is-thirteen");
+   * \endcode
+   */
+  DependencyMetadata& SetExportName(const gd::String& exportName_) {
+    exportName = exportName_;
+    return *this;
+  };
+
+  /**
+   * \brief Set the version of the dependency to install. 
+   * Use an empty string to use the latest version.
+   */
+  DependencyMetadata& SetVersion(const gd::String& version_) {
+    version = version_;
+    return *this;
+  };
+
+  /**
+   * \brief Sets the type of dependecy (what will be used to install it)
+   *
+   * This can either be "npm" or "cordova" for now. 
+   */
+  DependencyMetadata& SetDependencyType(const gd::String& dependencyType_) {
+    dependencyType = dependencyType_;
+    if (dependencyType != "npm" && dependencyType != "cordova") {
+      gd::LogWarning("Invalid dependency type: " + dependencyType);
+    }
+    return *this;
+  };
+
+  /**
+   * \brief Sets a dependency type specific setting.
+   */
+  DependencyMetadata& SetExtraSetting(
+      const gd::String& settingName,
+      const gd::PropertyDescriptor& settingValue) {
+    extraData[settingName] = settingValue;
+    return *this;
+  };
+
+  const gd::String& GetName() const { return name; };
+  const gd::String& GetExportName() const { return exportName; };
+  const gd::String& GetVersion() const { return version; };
+  const gd::String& GetDependencyType() const { 
+    if(dependencyType == "") gd::LogWarning("Dependency has no type, it won't be exported.");
+    return dependencyType; 
+  };
+  gd::PropertyDescriptor& GetExtraSetting(const gd::String& settingName) {
+    return extraData[settingName];
+  };
+  std::map<gd::String, gd::PropertyDescriptor>& GetAllExtraSettings() {
+    return extraData;
+  }
+
+ private:
+  gd::String name;  ///< The name of the dependency.
+  gd::String exportName;  ///< The name used to install the package (example: npm package name
+                          ///< for npm dependency type).
+  gd::String version;  ///< The version of the dependency
+  gd::String dependencyType;  ///< The tool used to install the dependency.
+  std::map<gd::String, gd::PropertyDescriptor>
+      extraData;  ///< Contains dependency type specific additional parameters
+                  ///< for the dependency.
+};
+}  // namespace gd
+#endif  // DEPENDENCYMETADATA_H
@@ -4,9 +4,12 @@
 * reserved. This project is released under the MIT License.
 */
 #include "GDCore/Extensions/PlatformExtension.h"
+
 #include <algorithm>
+
 #include "GDCore/Events/Event.h"
 #include "GDCore/Extensions/Metadata/BehaviorMetadata.h"
+#include "GDCore/Extensions/Metadata/DependencyMetadata.h"
 #include "GDCore/Extensions/Metadata/EventMetadata.h"
 #include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
 #include "GDCore/Extensions/Metadata/InstructionMetadata.h"
@@ -117,6 +120,13 @@ gd::ExpressionMetadata& PlatformExtension::AddStrExpression(
 #endif
 }

+#if defined(GD_IDE_ONLY)
+gd::DependencyMetadata& PlatformExtension::AddDependency() {
+  extensionDependenciesMetadata.push_back(DependencyMetadata());
+  return extensionDependenciesMetadata.back();
+}
+#endif
+
 gd::ObjectMetadata& PlatformExtension::AddObject(
    const gd::String& name,
    const gd::String& fullname,
@@ -216,8 +226,7 @@ std::vector<gd::String> PlatformExtension::GetExtensionObjectsTypes() const {

 std::vector<gd::String> PlatformExtension::GetExtensionEffectTypes() const {
  std::vector<gd::String> effectNames;
-  for (auto& it : effectsMetadata)
-    effectNames.push_back(it.first);
+  for (auto& it : effectsMetadata) effectNames.push_back(it.first);

  return effectNames;
 }
@@ -283,6 +292,10 @@ PlatformExtension::GetAllStrExpressions() {
  return strExpressionsInfos;
 }

+std::vector<gd::DependencyMetadata>& PlatformExtension::GetAllDependencies() {
+  return extensionDependenciesMetadata;
+}
+
 std::map<gd::String, gd::EventMetadata>& PlatformExtension::GetAllEvents() {
  return eventsInfos;
 }
@@ -404,7 +417,7 @@ void PlatformExtension::SetNameSpace(gd::String nameSpace_) {
      name == "BuiltinCommonConversions" ||
      name == "BuiltinStringInstructions" ||
      name == "BuiltinMathematicalTools" ||
-      name == "Effects" || // Well-known effects are not namespaced.
+      name == "Effects" ||      // Well-known effects are not namespaced.
      name == "CommonDialogs")  // New name for BuiltinInterface
  {
    nameSpace = "";
@@ -10,11 +10,14 @@
 #include <map>
 #include <memory>
 #include <vector>
+
 #include "GDCore/CommonTools.h"
 #include "GDCore/Extensions/Metadata/BehaviorMetadata.h"
+#include "GDCore/Extensions/Metadata/DependencyMetadata.h"
+#include "GDCore/Extensions/Metadata/EffectMetadata.h"
 #include "GDCore/Extensions/Metadata/EventMetadata.h"
 #include "GDCore/Extensions/Metadata/ObjectMetadata.h"
-#include "GDCore/Extensions/Metadata/EffectMetadata.h"
+#include "GDCore/Project/PropertyDescriptor.h"
 #include "GDCore/String.h"
 #include "GDCore/Tools/VersionPriv.h"

@@ -25,6 +28,7 @@ class ExpressionMetadata;
 class ObjectMetadata;
 class BehaviorMetadata;
 class EffectMetadata;
+class DependencyMetadata;
 class BaseEvent;
 class EventMetadata;
 class EventCodeGenerator;
@@ -148,6 +152,8 @@ class GD_CORE_API PlatformExtension {
                                           const gd::String& group_,
                                           const gd::String& smallicon_);

+  gd::DependencyMetadata& AddDependency();
+
  /**
   * \brief Declare a new object as being part of the extension.
   * \note This method does nothing when used for GD C++ runtime.
@@ -225,6 +231,33 @@ class GD_CORE_API PlatformExtension {
                              const gd::String& smallicon_,
                              std::shared_ptr<gd::BaseEvent> instance);

+#if defined(GD_IDE_ONLY)
+  /**
+   * \brief Adds a property to the Extension.
+   * \param name The internal name of the property (to get it later).
+   * \param description The description of the property.
+   * \param type The type of the property. Supported ones are "string", "number"
+   * and "boolean".
+   */
+  gd::PropertyDescriptor& RegisterProperty(const gd::String& name,
+                                           const gd::String& description,
+                                           const gd::String& type,
+                                           const gd::String& hint) {
+    extensionPropertiesMetadata[name]
+        .SetDescription(description)
+        .SetType(type)
+        .SetLabel(hint);
+    return extensionPropertiesMetadata[name];
+  };
+
+  /**
+   * \brief Adds a property to the Extension.
+   */
+  gd::PropertyDescriptor& RegisterProperty(const gd::String& name) {
+    return extensionPropertiesMetadata[name];
+  };
+#endif
+
  /**
   * \brief Return the name extension user friendly name.
   */
@@ -365,6 +398,12 @@ class GD_CORE_API PlatformExtension {
   */
  std::map<gd::String, gd::ExpressionMetadata>& GetAllStrExpressions();

+  /**
+   * \brief Return a reference to a vector containing the metadata of all the
+   * dependencies of the extension.
+   */
+  std::vector<gd::DependencyMetadata>& GetAllDependencies();
+
  /**
   * \brief Return a reference to a map containing the names of the actions,
   * related to the object type, and the metadata associated with.
@@ -437,6 +476,13 @@ class GD_CORE_API PlatformExtension {
   * generator.
   */
  void StripUnimplementedInstructionsAndExpressions();
+
+  /**
+   * \brief Get all the properties of the extension
+   */
+  std::map<gd::String, gd::PropertyDescriptor>& GetAllProperties() {
+    return extensionPropertiesMetadata;
+  }
 #endif

  /**
@@ -480,7 +526,9 @@ class GD_CORE_API PlatformExtension {
  std::map<gd::String, gd::InstructionMetadata> actionsInfos;
  std::map<gd::String, gd::ExpressionMetadata> expressionsInfos;
  std::map<gd::String, gd::ExpressionMetadata> strExpressionsInfos;
+  std::vector<gd::DependencyMetadata> extensionDependenciesMetadata;
  std::map<gd::String, gd::EventMetadata> eventsInfos;
+  std::map<gd::String, gd::PropertyDescriptor> extensionPropertiesMetadata;
 #endif

  ObjectMetadata badObjectMetadata;
@@ -0,0 +1,56 @@
+#include "ExtensionProperties.h"
+#include "GDCore/Extensions/Platform.h"
+#include "GDCore/Extensions/PlatformExtension.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/Project/PropertyDescriptor.h"
+
+namespace gd {
+const gd::String ExtensionProperties::defaultValue = "";
+
+std::map<gd::String, gd::PropertyDescriptor>
+ExtensionProperties::GetAllExtensionProperties(const gd::String& extensionName,
+                                               gd::Project& project) {
+  // Create a copy
+  std::map<gd::String, gd::PropertyDescriptor> props(
+      project.GetCurrentPlatform()
+          .GetExtension(extensionName)
+          ->GetAllProperties());
+  // Set values
+  for (std::pair<gd::String, gd::PropertyDescriptor> property : props) {
+    if (properties.count(extensionName) > 0 &&
+        properties[extensionName].count(property.first) > 0) {
+      props[property.first].SetValue(properties[extensionName][property.first]);
+    }
+  }
+  return props;
+};
+
+void ExtensionProperties::SerializeTo(SerializerElement& element) const {
+  element.ConsiderAsArrayOf("extensionProperties");
+  for (const std::pair<gd::String, std::map<gd::String, gd::String>> extension :
+       properties) {
+    for (const std::pair<gd::String, gd::String> property : extension.second) {
+      SerializerElement& propertyElement =
+          element.AddChild("extensionProperties");
+      propertyElement.AddChild("extension").SetStringValue(extension.first);
+      propertyElement.AddChild("property").SetStringValue(property.first);
+      propertyElement.AddChild("value").SetStringValue(property.second);
+    }
+  }
+};
+
+void ExtensionProperties::UnserializeFrom(const SerializerElement& element) {
+  properties.clear();
+  element.ConsiderAsArrayOf("extensionProperties");
+  for (std::pair<const gd::String, std::shared_ptr<SerializerElement>>
+           extensionProperties : element.GetAllChildren()) {
+    std::shared_ptr<SerializerElement> extensionPropertiesElement =
+        extensionProperties.second;
+    properties
+        [extensionPropertiesElement->GetChild("extension").GetStringValue()]
+        [extensionPropertiesElement->GetChild("property").GetStringValue()] =
+            extensionPropertiesElement->GetChild("value").GetStringValue();
+  }
+};
+
+};  // namespace gd
@@ -0,0 +1,69 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival ([email protected]). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef GDCORE_EXTENSIONPROPERTIES_H
+#define GDCORE_EXTENSIONPROPERTIES_H
+#include <map>
+
+#include "GDCore/Serialization/SerializerElement.h"
+#include "GDCore/String.h"
+
+namespace gd {
+class Project;
+class PropertyDescriptor;
+}  // namespace gd
+
+namespace gd {
+class GD_CORE_API ExtensionProperties {
+  static const gd::String defaultValue;
+
+ public:
+  const gd::String& GetValue(const gd::String& extension,
+                             const gd::String& property) const {
+    if (properties.count(extension) == 0 ||
+        properties.at(extension).count(property) == 0) {
+      return ExtensionProperties::defaultValue;
+    }
+    return properties.at(extension).at(property);
+  };
+
+  void SetValue(const gd::String& extension,
+                const gd::String& property,
+                const gd::String& newValue) {
+    properties[extension][property] = newValue;
+  };
+
+  bool HasProperty(const gd::String& extension, const gd::String& property) {
+    for (std::pair<gd::String, gd::String> propertyPair :
+         properties[extension]) {
+      if (propertyPair.first == property) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  std::map<gd::String, gd::PropertyDescriptor> GetAllExtensionProperties(
+      const gd::String& extensionName, gd::Project& project);
+
+  ///@{
+  /**
+   * \brief Serialize the Extension Properties.
+   */
+  virtual void SerializeTo(SerializerElement& element) const;
+
+  /**
+   * \brief Unserialize the Extension Properties.
+   */
+  virtual void UnserializeFrom(const SerializerElement& element);
+  ///@}
+
+ private:
+  std::map<gd::String, std::map<gd::String, gd::String>>
+      properties;  ///< The properties of the project
+};
+}  // namespace gd
+
+#endif  // EXTENSIONPROPERTIES_H
@@ -23,4 +23,14 @@ void NamedPropertyDescriptor::UnserializeFrom(
  name = element.GetChild("name").GetStringValue();
 }

+void NamedPropertyDescriptor::SerializeValuesTo(SerializerElement& element) const {
+  PropertyDescriptor::SerializeValuesTo(element);
+  element.AddChild("name").SetStringValue(name);
+}
+
+void NamedPropertyDescriptor::UnserializeValuesFrom(const SerializerElement& element) {
+  PropertyDescriptor::UnserializeValuesFrom(element);
+  name = element.GetChild("name").GetStringValue();
+}
+
 }  // namespace gd
@@ -58,6 +58,16 @@ class GD_CORE_API NamedPropertyDescriptor : public PropertyDescriptor {
   * \brief Unserialize the NamedPropertyDescriptor.
   */
  void UnserializeFrom(const SerializerElement& element);
+
+  /**
+   * \brief Serialize only the value and extra informations of the property.
+   */
+  virtual void SerializeValuesTo(SerializerElement& element) const;
+
+  /**
+   * \brief Unserialize only the value and extra information of the property.
+   */
+  virtual void UnserializeValuesFrom(const SerializerElement& element);
  ///@}

  /**
@@ -5,13 +5,16 @@
 */

 #include "Project.h"
+
 #include <stdio.h>
 #include <stdlib.h>
-#include <cctype>
+
 #include <SFML/System/Utf.hpp>
+#include <cctype>
 #include <fstream>
 #include <map>
 #include <vector>
+
 #include "GDCore/CommonTools.h"
 #include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
 #include "GDCore/Extensions/Metadata/MetadataProvider.h"
@@ -51,7 +54,6 @@ Project::Project()
      version("1.0.0"),
      packageName("com.example.gamename"),
      orientation("landscape"),
-      adMobAppId(""),
      folderProject(false),
 #endif
      windowWidth(800),
@@ -596,7 +598,6 @@ void Project::UnserializeFrom(const SerializerElement& element) {
  SetAuthor(propElement.GetChild("author", 0, "Auteur").GetValue().GetString());
  SetPackageName(propElement.GetStringAttribute("packageName"));
  SetOrientation(propElement.GetStringAttribute("orientation", "default"));
-  SetAdMobAppId(propElement.GetStringAttribute("adMobAppId", ""));
  SetFolderProject(propElement.GetBoolAttribute("folderProject"));
  SetProjectFile(propElement.GetStringAttribute("projectFile"));
  SetLastCompilationDirectory(propElement
@@ -618,6 +619,20 @@ void Project::UnserializeFrom(const SerializerElement& element) {
      propElement.GetStringAttribute("macExecutableFilename");
  useExternalSourceFiles =
      propElement.GetBoolAttribute("useExternalSourceFiles");
+
+  extensionProperties.UnserializeFrom(
+      propElement.GetChild("extensionProperties"));
+
+  // Compatibility with GD <= 5.0.0-beta98
+  // Move AdMob App ID from project property to extension property.
+  if (propElement.GetStringAttribute("adMobAppId", "") != "") {
+    extensionProperties.SetValue(
+        "AdMob",
+        "AdMobAppId",
+        propElement.GetStringAttribute("adMobAppId", ""));
+  }
+  // end of compatibility code
+
 #endif

  const SerializerElement& extensionsElement =
@@ -866,13 +881,13 @@ void Project::SerializeTo(SerializerElement& element) const {
  propElement.AddChild("verticalSync")
      .SetValue(IsVerticalSynchronizationEnabledByDefault());
  propElement.SetAttribute("scaleMode", scaleMode);
-  propElement.SetAttribute("adaptGameResolutionAtRuntime", adaptGameResolutionAtRuntime);
+  propElement.SetAttribute("adaptGameResolutionAtRuntime",
+                           adaptGameResolutionAtRuntime);
  propElement.SetAttribute("sizeOnStartupMode", sizeOnStartupMode);
  propElement.SetAttribute("projectFile", gameFile);
  propElement.SetAttribute("folderProject", folderProject);
  propElement.SetAttribute("packageName", packageName);
  propElement.SetAttribute("orientation", orientation);
-  propElement.SetAttribute("adMobAppId", adMobAppId);
  platformSpecificAssets.SerializeTo(
      propElement.AddChild("platformSpecificAssets"));
  loadingScreen.SerializeTo(propElement.AddChild("loadingScreen"));
@@ -882,6 +897,8 @@ void Project::SerializeTo(SerializerElement& element) const {
  propElement.SetAttribute("macExecutableFilename", macExecutableFilename);
  propElement.SetAttribute("useExternalSourceFiles", useExternalSourceFiles);

+  extensionProperties.SerializeTo(propElement.AddChild("extensionProperties"));
+
  SerializerElement& extensionsElement = propElement.AddChild("extensions");
  extensionsElement.ConsiderAsArrayOf("extension");
  for (std::size_t i = 0; i < GetUsedExtensions().size(); ++i)
@@ -1071,13 +1088,14 @@ void Project::Init(const gd::Project& game) {
  author = game.author;
  packageName = game.packageName;
  orientation = game.orientation;
-  adMobAppId = game.adMobAppId;
  folderProject = game.folderProject;
  latestCompilationDirectory = game.latestCompilationDirectory;
  platformSpecificAssets = game.platformSpecificAssets;
  loadingScreen = game.loadingScreen;
  objectGroups = game.objectGroups;

+  extensionProperties = game.extensionProperties;
+
  gdMajorVersion = game.gdMajorVersion;
  gdMinorVersion = game.gdMinorVersion;
  gdBuildVersion = game.gdBuildVersion;
@@ -9,6 +9,7 @@
 #include <memory>
 #include <vector>

+#include "GDCore/Project/ExtensionProperties.h"
 #include "GDCore/Project/LoadingScreen.h"
 #include "GDCore/Project/ObjectGroupsContainer.h"
 #include "GDCore/Project/ObjectsContainer.h"
@@ -114,20 +115,6 @@ class GD_CORE_API Project : public ObjectsContainer {
   */
  const gd::String& GetOrientation() const { return orientation; }

-  /**
-   * \brief Change the project AdMob application ID (needed
-   * to use the AdMob extension). This has no effect on desktop
-   * and web browsers.
-   */
-  void SetAdMobAppId(const gd::String& adMobAppId_) {
-    adMobAppId = adMobAppId_;
-  };
-
-  /**
-   * \brief Get the project AdMob application ID.
-   */
-  const gd::String& GetAdMobAppId() const { return adMobAppId; }
-
  /**
   * Called when project file has changed.
   */
@@ -305,6 +292,26 @@ class GD_CORE_API Project : public ObjectsContainer {
  std::vector<gd::String>& GetUsedExtensions() { return extensionsUsed; };

 #if defined(GD_IDE_ONLY)
+  /**
+   * \brief Get the properties set by extensions. 
+   * 
+   * Each extension can store arbitrary values indexed by a property name, which are
+   * useful to store project wide settings (AdMob id, etc...).
+   */
+  gd::ExtensionProperties& GetExtensionProperties() {
+    return extensionProperties;
+  };
+
+  /**
+   * \brief Get the properties set by extensions. 
+   * 
+   * Each extension can store arbitrary values indexed by a property name, which are
+   * useful to store project wide settings (AdMob id, etc...).
+   */
+  const gd::ExtensionProperties& GetExtensionProperties() const {
+    return extensionProperties;
+  };
+
  /**
   * Return the list of platforms used by the project.
   */
@@ -968,7 +975,6 @@ class GD_CORE_API Project : public ObjectsContainer {
  gd::String packageName;   ///< Game package name
  gd::String orientation;   ///< Lock game orientation (on mobile devices).
                            ///< "default", "landscape" or "portrait".
-  gd::String adMobAppId;    ///< AdMob application ID.
  bool
      folderProject;  ///< True if folder project, false if single file project.
  gd::String gameFile;                    ///< File of the game
@@ -978,7 +984,9 @@ class GD_CORE_API Project : public ObjectsContainer {
  gd::PlatformSpecificAssets platformSpecificAssets;
  gd::LoadingScreen loadingScreen;
  std::vector<std::unique_ptr<gd::ExternalEvents> >
-      externalEvents;                   ///< List of all externals events
+      externalEvents;  ///< List of all externals events
+  ExtensionProperties
+      extensionProperties;              ///< The properties of the extensions.
  mutable unsigned int gdMajorVersion;  ///< The GD major version used the last
                                        ///< time the project was saved.
  mutable unsigned int gdMinorVersion;  ///< The GD minor version used the last
@@ -4,7 +4,9 @@
 * reserved. This project is released under the MIT License.
 */
 #include "PropertyDescriptor.h"
+
 #include <vector>
+
 #include "GDCore/Serialization/SerializerElement.h"
 #include "GDCore/String.h"

@@ -45,4 +47,27 @@ void PropertyDescriptor::UnserializeFrom(const SerializerElement& element) {
               : false;
 }

+void PropertyDescriptor::SerializeValuesTo(SerializerElement& element) const {
+  element.AddChild("value").SetStringValue(currentValue);
+  SerializerElement& extraInformationElement =
+      element.AddChild("extraInformation");
+  extraInformationElement.ConsiderAsArray();
+  for (const gd::String& information : extraInformation) {
+    extraInformationElement.AddChild("").SetStringValue(information);
+  }
+}
+
+void PropertyDescriptor::UnserializeValuesFrom(
+    const SerializerElement& element) {
+  currentValue = element.GetChild("value").GetStringValue();
+
+  extraInformation.clear();
+  const SerializerElement& extraInformationElement =
+      element.GetChild("extraInformation");
+  extraInformationElement.ConsiderAsArray();
+  for (std::size_t i = 0; i < extraInformationElement.GetChildrenCount(); ++i)
+    extraInformation.push_back(
+        extraInformationElement.GetChild(i).GetStringValue());
+}
+
 }  // namespace gd
@@ -6,6 +6,7 @@
 #ifndef GDCORE_PROPERTYDESCRIPTOR
 #define GDCORE_PROPERTYDESCRIPTOR
 #include <vector>
+
 #include "GDCore/String.h"
 namespace gd {
 class SerializerElement;
@@ -120,6 +121,16 @@ class GD_CORE_API PropertyDescriptor {
   * \brief Unserialize the PropertyDescriptor.
   */
  virtual void UnserializeFrom(const SerializerElement& element);
+
+  /**
+   * \brief Serialize only the value and extra informations.
+   */
+  virtual void SerializeValuesTo(SerializerElement& element) const;
+
+  /**
+   * \brief Unserialize only the value and extra informations.
+   */
+  virtual void UnserializeValuesFrom(const SerializerElement& element);
  ///@}

 private:
@@ -127,7 +138,7 @@ class GD_CORE_API PropertyDescriptor {
  gd::String
      type;  ///< The type of the property. This is arbitrary and interpreted by
             ///< the class responsible for updating the property grid.
-  gd::String label;  //< The user-friendly property name
+  gd::String label;        //< The user-friendly property name
  gd::String description;  //< The user-friendly property description
  std::vector<gd::String>
      extraInformation;  ///< Can be used to store for example the available
@@ -32,6 +32,22 @@ module.exports = {
      'MIT'
    );

+    extension.registerProperty("AdMobAppId")
+      .setDescription("AdMob App ID")
+      .setType("string")
+      .setLabel("ca-app-pub-XXXXXXXXXXXXXXXX/YYYYYYYYYY");
+
+    extension.addDependency()
+      .setName("AdMob Cordova Extension")
+      .setDependencyType("cordova")
+      .setExportName("cordova-plugin-admob-free")
+      .setVersion("~0.21.0")
+      .setExtraSetting(
+        "ADMOB_APP_ID", 
+        new gd.PropertyDescriptor("AdMobAppId")
+         .setType("ExtensionProperty")
+      );
+
    // Banner
    extension
      .addCondition(
@@ -33,6 +33,29 @@ module.exports = {
      'MIT'
    );

+    // Register Properties
+    extension.registerProperty("DummyPropertyString")
+      .setDescription(_("Dummy Property Name"))
+      .setType("string")
+      .setLabel("Type in anything :)");
+
+    extension.registerProperty("DummyPropertyNumber")
+      .setDescription(_("Dummy Numeric Property Name"))
+      .setType("number")
+      .setLabel("Only numbers here ;)");
+    
+    extension.registerProperty("DummyPropertyBoolean")
+      .setDescription(_("A boolean property"))
+      .setType("boolean");
+
+    // Register Cordova/NPM dependencies
+    extension
+      .addDependency()
+      .setName("Thirteen Checker")
+      .setDependencyType("npm")
+      .setExportName("is-thirteen")
+      .setVersion("2.0.0");
+
    // Declare effects:
    const dummyEffect = extension
      .addEffect('DummyEffect')
@@ -23,6 +23,10 @@
 #include "GDCore/Project/Layout.h"
 #include "GDCore/Project/Project.h"
 #include "GDCore/Project/SourceFile.h"
+#include "GDCore/Project/PropertyDescriptor.h"
+#include "GDCore/Extensions/Platform.h"
+#include "GDCore/Extensions/PlatformExtension.h"
+#include "GDCore/Extensions/Metadata/DependencyMetadata.h"
 #include "GDCore/Serialization/Serializer.h"
 #include "GDCore/TinyXml/tinyxml.h"
 #include "GDCore/Tools/Localization.h"
@@ -261,16 +265,37 @@ bool ExporterHelper::ExportCordovaFiles(const gd::Project &project,
          .FindAndReplace("<!-- GDJS_ICONS_ANDROID -->", makeIconsAndroid())
          .FindAndReplace("<!-- GDJS_ICONS_IOS -->", makeIconsIos());

-  if (!project.GetAdMobAppId().empty()) {
-    str = str.FindAndReplace(
-        "<!-- GDJS_ADMOB_PLUGIN_AND_APPLICATION_ID -->",
-        "<plugin name=\"cordova-plugin-admob-free\" spec=\"~0.21.0\">\n"
-        "\t\t<variable name=\"ADMOB_APP_ID\" value=\"" +
-            project.GetAdMobAppId() +
-            "\" />\n"
-            "\t</plugin>");
+  gd::String plugins = "";
+
+  for(std::shared_ptr<gd::PlatformExtension> extension : project.GetCurrentPlatform().GetAllPlatformExtensions()) { //TODO Add a way to select only used Extensions
+    for (gd::DependencyMetadata dependencies: extension->GetAllDependencies()) {
+      if (dependencies.GetDependencyType() == "cordova") {
+
+        plugins += "<plugin name=\"" + dependencies.GetExportName();
+        if(dependencies.GetVersion() != "") {
+          plugins += "\" spec=\"" + dependencies.GetVersion();
+        }
+        plugins += "\">\n"; 
+
+        // In cordova all settings are considered a plugin variable
+        for (std::pair<const gd::String, gd::PropertyDescriptor>& dependency : dependencies.GetAllExtraSettings()) {
+          if (dependency.second.GetType() == "ExtensionProperty") {
+            plugins += "\t\t<variable name=\"" + dependency.first + "\" value=\"" + project.GetExtensionProperties().GetValue(extension->GetName(), dependency.second.GetValue()) + "\" />\n";
+          } else {
+            plugins += "\t\t<variable name=\"" + dependency.first + "\" value=\"" + dependency.second.GetValue() + "\" />\n";
+          }
+        }
+
+        plugins += "\t</plugin>";
+      }
+    }
  }

+  str = str.FindAndReplace(
+    "<!-- GDJS_EXTENSION_CORDOVA_DEPENDENCY -->",
+    plugins
+  );
+
  if (!fs.WriteToFile(exportDir + "/config.xml", str)) {
    lastError = "Unable to write Cordova config.xml file.";
    return false;
@@ -421,6 +446,26 @@ bool ExporterHelper::ExportElectronFiles(const gd::Project &project,
            .FindAndReplace("\"GDJS_GAME_VERSION\"", jsonVersion)
            .FindAndReplace("\"GDJS_GAME_MANGLED_NAME\"", jsonMangledName);

+    gd::String packages = "";
+
+    for(std::shared_ptr<gd::PlatformExtension> extension : project.GetCurrentPlatform().GetAllPlatformExtensions()) { //TODO Add a way to select only used Extensions
+      for (gd::DependencyMetadata dependency: extension->GetAllDependencies()) {
+        if (dependency.GetDependencyType() == "npm") {
+          if(dependency.GetVersion() == "") {
+            gd::LogError("Latest Version not available for NPM dependencies, dependency " + dependency.GetName() + " is not exported. Please specify a version when calling addDependency.");
+            continue;
+          }
+          packages += "\n\t\"" + dependency.GetExportName() + "\": \"" + dependency.GetVersion() + "\",";
+          // For node extra settings are ignored
+        }
+      }
+    }
+
+    packages = packages.substr(1, packages.size()); // Remove first line break for esthetic.
+    packages = packages.substr(0, packages.size()-1); // Remove the , at the end as last item cannot have , in JSON.
+
+    str = str.FindAndReplace("\"GDJS_EXTENSION_NPM_DEPENDENCY\": \"0\"", packages);
+
    if (!fs.WriteToFile(exportDir + "/package.json", str)) {
      lastError = "Unable to write Electron package.json file.";
      return false;
@@ -30,5 +30,5 @@
    <!-- Cordova/Phonegap version -->
    <preference name="phonegap-version" value="cli-9.0.0" />

-    <!-- GDJS_ADMOB_PLUGIN_AND_APPLICATION_ID -->
+    <!-- GDJS_EXTENSION_CORDOVA_DEPENDENCY -->
 </widget>
@@ -5,7 +5,9 @@
    "description": "GDJS_GAME_NAME",
    "author": "GDJS_GAME_AUTHOR",
    "version": "GDJS_GAME_VERSION",
-    "dependencies": {},
+    "dependencies": {
+      "GDJS_EXTENSION_NPM_DEPENDENCY": "0"
+    },
    "devDependencies": {
      "electron": "8.2.5"
    },
@@ -601,3 +601,16 @@ gdjs.RuntimeGame.prototype.getSceneStack = function() {
 gdjs.RuntimeGame.prototype.isPreview = function() {
  return this._isPreview;
 }
+
+/**
+ * Gets an extension property from the project data.
+ * @param {string} extensionName The extension name.
+ * @param {string} propertyName The property name.
+ * @return {?string} The property value.
+ */
+gdjs.RuntimeGame.prototype.getExtensionProperty = function(extensionName, propertyName) {
+  for(let property of this._data.properties.extensionProperties) {
+    if(property.extension === extensionName && property.property === propertyName) return property.value;
+  }
+  return null;
+}
@@ -145,6 +145,13 @@ export interface ProjectPropertiesData {
  verticalSync: boolean;
  loadingScreen: LoadingScreenData;
  currentPlatform: string;
+  extensionProperties: Array<ExtensionProperty>;
+}
+
+export interface ExtensionProperty {
+  extension: string;
+  property: string;
+  value: string;
 }

 export interface LoadingScreenData {
@@ -34,6 +34,11 @@ interface VectorPlatformExtension {
    [Const] PlatformExtension WRAPPED_at(unsigned long index);
 };

+interface VectorDependencyMetadata {
+    unsigned long size();
+    [Const, Ref] DependencyMetadata at(unsigned long index);
+};
+
 interface MapStringString {
    void MapStringString();

@@ -89,6 +94,13 @@ interface MapStringEventMetadata {
    [Value] VectorString MAP_keys();
 };

+interface MapExtensionProperties {
+    [Ref] MapStringPropertyDescriptor MAP_get([Const] DOMString name);
+    void MAP_set([Const] DOMString name, [Const, Ref] MapStringPropertyDescriptor prop);
+    boolean MAP_has([Const] DOMString name);
+    [Value] VectorString MAP_keys();
+};
+
 interface SetString {
    void SetString();
    [Value] VectorString FREE_toNewVectorString();
@@ -288,8 +300,6 @@ interface Project {
    [Const, Ref] DOMString GetPackageName();
    void SetOrientation([Const] DOMString orientation);
    [Const, Ref] DOMString GetOrientation();
-    void SetAdMobAppId([Const] DOMString adMobAppId);
-    [Const, Ref] DOMString GetAdMobAppId();
    void SetProjectFile([Const] DOMString file);
    [Const, Ref] DOMString GetProjectFile();
    void SetGameResolutionSize(long width, long height);
@@ -312,6 +322,7 @@ interface Project {
    [Const, Ref] DOMString GetLastCompilationDirectory();

    [Const, Ref] VectorString GetUsedExtensions();
+    [Ref] ExtensionProperties GetExtensionProperties();
    void AddPlatform([Ref] Platform platform);
    [Ref] Platform GetCurrentPlatform();

@@ -384,6 +395,16 @@ interface Project {
    [Ref] ObjectGroupsContainer GetObjectGroups();
 };

+interface ExtensionProperties {
+    [Const, Ref] DOMString GetValue([Const] DOMString extension, [Const] DOMString property);
+    void SetValue([Const] DOMString extension, [Const] DOMString property, [Const] DOMString newValue);
+    boolean HasProperty([Const] DOMString extension, [Const] DOMString property);
+    [Value] MapStringPropertyDescriptor GetAllExtensionProperties([Const] DOMString extension, [Ref] Project project);
+    
+    void SerializeTo([Ref] SerializerElement element);
+    void UnserializeFrom([Const, Ref] SerializerElement element);
+};
+
 interface Behavior {
    void Behavior();

@@ -650,6 +671,8 @@ interface PropertyDescriptor {

    void SerializeTo([Ref] SerializerElement element);
    void UnserializeFrom([Const, Ref] SerializerElement element);
+    void SerializeValuesTo([Ref] SerializerElement element);
+    void UnserializeValuesFrom([Const, Ref] SerializerElement element);
 };

 interface NamedPropertyDescriptor {
@@ -1020,6 +1043,22 @@ interface ExpressionMetadata {
    [Ref] ExpressionCodeGenerationInformation GetCodeExtraInformation();
 };

+interface DependencyMetadata {
+    void DependencyMetadata();
+
+    [Const, Ref] DOMString GetName();
+    [Ref] DependencyMetadata SetName([Const] DOMString name_);
+    [Const, Ref] DOMString GetExportName();
+    [Ref] DependencyMetadata SetExportName([Const] DOMString exportName_);
+    [Const, Ref] DOMString GetVersion();
+    [Ref] DependencyMetadata SetVersion([Const] DOMString version_);
+    [Const, Ref] DOMString GetDependencyType();
+    [Ref] DependencyMetadata SetDependencyType([Const] DOMString dependencyType_);
+    [Ref] PropertyDescriptor GetExtraSetting([Const] DOMString settingName);
+    [Ref] DependencyMetadata SetExtraSetting([Const] DOMString settingName, [Const, Ref] PropertyDescriptor settingValue);
+    [Ref] MapStringPropertyDescriptor GetAllExtraSettings();
+};
+
 interface ParameterMetadata {
    void ParameterMetadata();

@@ -1229,6 +1268,8 @@ interface PlatformExtension {
                                           [Const] DOMString group,
                                           [Const] DOMString smallicon);

+    [Const, Ref] DependencyMetadata AddDependency();
+
    [Ref] BehaviorMetadata WRAPPED_AddBehavior([Const] DOMString name,
        [Const] DOMString fullname,
        [Const] DOMString defaultName,
@@ -1247,6 +1288,8 @@ interface PlatformExtension {

    [Ref] EffectMetadata AddEffect([Const] DOMString name);

+    [Ref] PropertyDescriptor RegisterProperty([Const] DOMString name);
+
    [Const, Ref] DOMString GetFullName();
    [Const, Ref] DOMString GetName();
    [Const, Ref] DOMString GetDescription();
@@ -1275,6 +1318,9 @@ interface PlatformExtension {
    [Ref] MapStringInstructionMetadata GetAllConditionsForBehavior([Const] DOMString autoType);
    [Ref] MapStringExpressionMetadata GetAllExpressionsForBehavior([Const] DOMString autoType);
    [Ref] MapStringExpressionMetadata GetAllStrExpressionsForBehavior([Const] DOMString autoType);
+    
+    [Ref] MapStringPropertyDescriptor GetAllProperties();
+    [Ref] VectorDependencyMetadata GetAllDependencies();

    [Const, Value] DOMString STATIC_GetNamespaceSeparator();
 };
@@ -1,57 +1,3 @@
-#include <map>
-#include <set>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include <GDCore/Extensions/Platform.h>
-#include <GDCore/Project/Behavior.h>
-#include <GDCore/Project/ExternalEvents.h>
-#include <GDCore/Project/ExternalLayout.h>
-#include <GDCore/Project/InitialInstance.h>
-#include <GDCore/Project/InitialInstancesContainer.h>
-#include <GDCore/Project/Layout.h>
-#include <GDCore/Project/Object.h>
-#include <GDCore/Project/Project.h>
-#include <GDCore/Project/Variable.h>
-#include <GDCore/Project/EventsBasedBehavior.h>
-#include <GDCore/Project/VariablesContainer.h>
-#include <GDCore/Project/Effect.h>
-#include <GDCore/Serialization/Serializer.h>
-#include <GDCore/Serialization/SerializerElement.h>
-
-#include <GDCore/Events/Parsers/ExpressionParser2.h>
-#include <GDCore/Events/Parsers/ExpressionParser2Node.h>
-#include <GDCore/IDE/Events/ExpressionValidator.h>
-#include <GDCore/Events/CodeGeneration/ExpressionCodeGenerator.h>
-#include <GDCore/Extensions/Metadata/EffectMetadata.h>
-#include <GDCore/Extensions/Metadata/MetadataProvider.h>
-#include <GDCore/Extensions/Metadata/ParameterMetadataTools.h>
-#include <GDCore/Project/EventsFunction.h>
-#include <GDCore/Project/EventsFunctionsExtension.h>
-#include <GDCore/IDE/AbstractFileSystem.h>
-#include <GDCore/IDE/EventsFunctionTools.h>
-#include <GDCore/IDE/Dialogs/LayoutEditorCanvas/LayoutEditorCanvasOptions.h>
-#include <GDCore/Project/PropertyDescriptor.h>
-#include <GDCore/Project/NamedPropertyDescriptor.h>
-#include <GDCore/IDE/Events/ArbitraryEventsWorker.h>
-#include <GDCore/IDE/Events/InstructionsTypeRenamer.h>
-#include <GDCore/IDE/Events/EventsContextAnalyzer.h>
-#include <GDCore/IDE/Events/EventsParametersLister.h>
-#include <GDCore/IDE/Events/EventsTypesLister.h>
-#include <GDCore/IDE/Events/EventsRefactorer.h>
-#include <GDCore/IDE/Events/EventsRemover.h>
-#include <GDCore/IDE/Events/InstructionSentenceFormatter.h>
-#include <GDCore/IDE/Events/TextFormatting.h>
-#include <GDCore/IDE/Events/EventsListUnfolder.h>
-#include <GDCore/IDE/Events/ExpressionCompletionFinder.h>
-#include <GDCore/IDE/Project/ArbitraryResourceWorker.h>
-#include <GDCore/IDE/Project/ResourcesMergingHelper.h>
-#include <GDCore/IDE/Project/ResourcesInUseHelper.h>
-#include <GDCore/IDE/Project/ProjectResourcesAdder.h>
-#include <GDCore/IDE/Project/ProjectResourcesCopier.h>
-#include <GDCore/IDE/WholeProjectRefactorer.h>
-
 #include <GDCore/Events/Builtin/CommentEvent.h>
 #include <GDCore/Events/Builtin/ForEachEvent.h>
 #include <GDCore/Events/Builtin/GroupEvent.h>
@@ -59,33 +5,82 @@
 #include <GDCore/Events/Builtin/RepeatEvent.h>
 #include <GDCore/Events/Builtin/StandardEvent.h>
 #include <GDCore/Events/Builtin/WhileEvent.h>
-
+#include <GDCore/Events/CodeGeneration/ExpressionCodeGenerator.h>
+#include <GDCore/Events/Parsers/ExpressionParser2.h>
+#include <GDCore/Events/Parsers/ExpressionParser2Node.h>
 #include <GDCore/Extensions/Builtin/SpriteExtension/Animation.h>
 #include <GDCore/Extensions/Builtin/SpriteExtension/Direction.h>
 #include <GDCore/Extensions/Builtin/SpriteExtension/Sprite.h>
 #include <GDCore/Extensions/Builtin/SpriteExtension/SpriteObject.h>
+#include <GDCore/Extensions/Metadata/DependencyMetadata.h>
+#include <GDCore/Extensions/Metadata/EffectMetadata.h>
+#include <GDCore/Extensions/Metadata/MetadataProvider.h>
+#include <GDCore/Extensions/Metadata/ParameterMetadataTools.h>
+#include <GDCore/Extensions/Platform.h>
+#include <GDCore/IDE/AbstractFileSystem.h>
+#include <GDCore/IDE/Dialogs/LayoutEditorCanvas/LayoutEditorCanvasOptions.h>
+#include <GDCore/IDE/Events/ArbitraryEventsWorker.h>
+#include <GDCore/IDE/Events/EventsContextAnalyzer.h>
+#include <GDCore/IDE/Events/EventsListUnfolder.h>
+#include <GDCore/IDE/Events/EventsParametersLister.h>
+#include <GDCore/IDE/Events/EventsRefactorer.h>
+#include <GDCore/IDE/Events/EventsRemover.h>
+#include <GDCore/IDE/Events/EventsTypesLister.h>
+#include <GDCore/IDE/Events/ExpressionCompletionFinder.h>
+#include <GDCore/IDE/Events/ExpressionValidator.h>
+#include <GDCore/IDE/Events/InstructionSentenceFormatter.h>
+#include <GDCore/IDE/Events/InstructionsTypeRenamer.h>
+#include <GDCore/IDE/Events/TextFormatting.h>
+#include <GDCore/IDE/EventsFunctionTools.h>
+#include <GDCore/IDE/Project/ArbitraryResourceWorker.h>
+#include <GDCore/IDE/Project/ProjectResourcesAdder.h>
+#include <GDCore/IDE/Project/ProjectResourcesCopier.h>
+#include <GDCore/IDE/Project/ResourcesInUseHelper.h>
+#include <GDCore/IDE/Project/ResourcesMergingHelper.h>
+#include <GDCore/IDE/WholeProjectRefactorer.h>
+#include <GDCore/Project/Behavior.h>
+#include <GDCore/Project/Effect.h>
+#include <GDCore/Project/EventsBasedBehavior.h>
+#include <GDCore/Project/EventsFunction.h>
+#include <GDCore/Project/EventsFunctionsExtension.h>
+#include <GDCore/Project/ExternalEvents.h>
+#include <GDCore/Project/ExternalLayout.h>
+#include <GDCore/Project/InitialInstance.h>
+#include <GDCore/Project/InitialInstancesContainer.h>
+#include <GDCore/Project/Layout.h>
+#include <GDCore/Project/NamedPropertyDescriptor.h>
+#include <GDCore/Project/Object.h>
+#include <GDCore/Project/Project.h>
+#include <GDCore/Project/PropertyDescriptor.h>
+#include <GDCore/Project/Variable.h>
+#include <GDCore/Project/VariablesContainer.h>
+#include <GDCore/Serialization/Serializer.h>
+#include <GDCore/Serialization/SerializerElement.h>
+#include <GDJS/Events/Builtin/JsCodeEvent.h>
+#include <GDJS/Events/CodeGeneration/BehaviorCodeGenerator.h>
+#include <GDJS/Events/CodeGeneration/EventsFunctionsExtensionCodeGenerator.h>
+#include <GDJS/Events/CodeGeneration/LayoutCodeGenerator.h>
+#include <GDJS/IDE/Exporter.h>
+#include <GDJS/IDE/ExporterHelper.h>
+#include <emscripten.h>
+
+#include <map>
+#include <set>
+#include <string>
+#include <utility>
+#include <vector>

 #include "../../Extensions/PanelSpriteObject/PanelSpriteObject.h"
 #include "../../Extensions/ParticleSystem/ParticleEmitterObject.h"
 #include "../../Extensions/PrimitiveDrawing/ShapePainterObject.h"
+#include "../../Extensions/SkeletonObject/SkeletonObject.h"
 #include "../../Extensions/TextEntryObject/TextEntryObject.h"
 #include "../../Extensions/TextObject/TextObject.h"
 #include "../../Extensions/TiledSpriteObject/TiledSpriteObject.h"
-#include "../../Extensions/SkeletonObject/SkeletonObject.h"
-
-#include <GDJS/Events/Builtin/JsCodeEvent.h>
-#include <GDJS/Events/CodeGeneration/LayoutCodeGenerator.h>
-#include <GDJS/Events/CodeGeneration/BehaviorCodeGenerator.h>
-#include <GDJS/Events/CodeGeneration/EventsFunctionsExtensionCodeGenerator.h>
-#include <GDJS/IDE/Exporter.h>
-#include <GDJS/IDE/ExporterHelper.h>
-
-#include <emscripten.h>
-#include "ProjectHelper.h"
-
 #include "BehaviorJsImplementation.h"
 #include "BehaviorSharedDataJsImplementation.h"
 #include "ObjectJsImplementation.h"
+#include "ProjectHelper.h"

 /**
 * \brief Manual binding of gd::ArbitraryResourceWorker to allow overriding
@@ -341,7 +336,8 @@ void removeFromVectorVector2f(std::vector<sf::Vector2f> &vec, size_t pos) {
  vec.erase(vec.begin() + pos);
 }

-void removeFromVectorParameterMetadata(std::vector<gd::ParameterMetadata> &vec, size_t pos) {
+void removeFromVectorParameterMetadata(std::vector<gd::ParameterMetadata> &vec,
+                                       size_t pos) {
  vec.erase(vec.begin() + pos);
 }

@@ -378,23 +374,33 @@ typedef std::vector<Polygon2d> VectorPolygon2d;
 typedef std::vector<sf::Vector2f> VectorVector2f;
 typedef std::vector<EventsSearchResult> VectorEventsSearchResult;
 typedef std::vector<gd::ParameterMetadata> VectorParameterMetadata;
+typedef std::vector<gd::DependencyMetadata> VectorDependencyMetadata;
 typedef std::vector<gd::EventsFunction> VectorEventsFunction;
 typedef gd::Object gdObject;  // To avoid clashing javascript Object in glue.js
 typedef ParticleEmitterObject::RendererType ParticleEmitterObject_RendererType;
 typedef EventsFunction::FunctionType EventsFunction_FunctionType;
 typedef std::unique_ptr<gd::Object> UniquePtrObject;
 typedef std::unique_ptr<ExpressionNode> UniquePtrExpressionNode;
-typedef std::vector<gd::ExpressionParserDiagnostic*> VectorExpressionParserDiagnostic;
-typedef gd::SerializableWithNameList<gd::EventsBasedBehavior> EventsBasedBehaviorsList;
-typedef gd::SerializableWithNameList<gd::NamedPropertyDescriptor> NamedPropertyDescriptorsList;
-typedef ExpressionCompletionDescription::CompletionKind ExpressionCompletionDescription_CompletionKind;
-typedef std::vector<gd::ExpressionCompletionDescription> VectorExpressionCompletionDescription;
+typedef std::vector<gd::ExpressionParserDiagnostic *>
+    VectorExpressionParserDiagnostic;
+typedef gd::SerializableWithNameList<gd::EventsBasedBehavior>
+    EventsBasedBehaviorsList;
+typedef gd::SerializableWithNameList<gd::NamedPropertyDescriptor>
+    NamedPropertyDescriptorsList;
+typedef ExpressionCompletionDescription::CompletionKind
+    ExpressionCompletionDescription_CompletionKind;
+typedef std::vector<gd::ExpressionCompletionDescription>
+    VectorExpressionCompletionDescription;
+typedef std::map<gd::String, std::map<gd::String, gd::PropertyDescriptor>>
+    MapExtensionProperties;

 typedef ExtensionAndMetadata<BehaviorMetadata> ExtensionAndBehaviorMetadata;
 typedef ExtensionAndMetadata<ObjectMetadata> ExtensionAndObjectMetadata;
 typedef ExtensionAndMetadata<EffectMetadata> ExtensionAndEffectMetadata;
-typedef ExtensionAndMetadata<InstructionMetadata> ExtensionAndInstructionMetadata;
-typedef ExtensionAndMetadata<InstructionMetadata> ExtensionAndInstructionMetadata;
+typedef ExtensionAndMetadata<InstructionMetadata>
+    ExtensionAndInstructionMetadata;
+typedef ExtensionAndMetadata<InstructionMetadata>
+    ExtensionAndInstructionMetadata;
 typedef ExtensionAndMetadata<ExpressionMetadata> ExtensionAndExpressionMetadata;
 typedef ExtensionAndMetadata<ExpressionMetadata> ExtensionAndExpressionMetadata;
 typedef ExtensionAndMetadata<ExpressionMetadata> ExtensionAndExpressionMetadata;
@@ -468,12 +474,18 @@ typedef ExtensionAndMetadata<ExpressionMetadata> ExtensionAndExpressionMetadata;
 #define STATIC_GetExtensionAndEffectMetadata GetExtensionAndEffectMetadata
 #define STATIC_GetExtensionAndActionMetadata GetExtensionAndActionMetadata
 #define STATIC_GetExtensionAndConditionMetadata GetExtensionAndConditionMetadata
-#define STATIC_GetExtensionAndExpressionMetadata GetExtensionAndExpressionMetadata
-#define STATIC_GetExtensionAndObjectExpressionMetadata GetExtensionAndObjectExpressionMetadata
-#define STATIC_GetExtensionAndBehaviorExpressionMetadata GetExtensionAndBehaviorExpressionMetadata
-#define STATIC_GetExtensionAndStrExpressionMetadata GetExtensionAndStrExpressionMetadata
-#define STATIC_GetExtensionAndObjectStrExpressionMetadata GetExtensionAndObjectStrExpressionMetadata
-#define STATIC_GetExtensionAndBehaviorStrExpressionMetadata GetExtensionAndBehaviorStrExpressionMetadata
+#define STATIC_GetExtensionAndExpressionMetadata \
+  GetExtensionAndExpressionMetadata
+#define STATIC_GetExtensionAndObjectExpressionMetadata \
+  GetExtensionAndObjectExpressionMetadata
+#define STATIC_GetExtensionAndBehaviorExpressionMetadata \
+  GetExtensionAndBehaviorExpressionMetadata
+#define STATIC_GetExtensionAndStrExpressionMetadata \
+  GetExtensionAndStrExpressionMetadata
+#define STATIC_GetExtensionAndObjectStrExpressionMetadata \
+  GetExtensionAndObjectStrExpressionMetadata
+#define STATIC_GetExtensionAndBehaviorStrExpressionMetadata \
+  GetExtensionAndBehaviorStrExpressionMetadata
 #define STATIC_HasCondition HasCondition
 #define STATIC_HasAction HasAction
 #define STATIC_HasObjectAction HasObjectAction
@@ -515,12 +527,16 @@ typedef ExtensionAndMetadata<ExpressionMetadata> ExtensionAndExpressionMetadata;
 #define STATIC_Date Date
 #define STATIC_ObjectOrGroupRenamedInLayout ObjectOrGroupRenamedInLayout
 #define STATIC_ObjectOrGroupRemovedInLayout ObjectOrGroupRemovedInLayout
-#define STATIC_ObjectOrGroupRemovedInEventsFunction ObjectOrGroupRemovedInEventsFunction
-#define STATIC_ObjectOrGroupRenamedInEventsFunction ObjectOrGroupRenamedInEventsFunction
+#define STATIC_ObjectOrGroupRemovedInEventsFunction \
+  ObjectOrGroupRemovedInEventsFunction
+#define STATIC_ObjectOrGroupRenamedInEventsFunction \
+  ObjectOrGroupRenamedInEventsFunction
 #define STATIC_GlobalObjectOrGroupRenamed GlobalObjectOrGroupRenamed
 #define STATIC_GlobalObjectOrGroupRemoved GlobalObjectOrGroupRemoved
-#define STATIC_GetAllObjectTypesUsingEventsBasedBehavior GetAllObjectTypesUsingEventsBasedBehavior
-#define STATIC_EnsureBehaviorEventsFunctionsProperParameters EnsureBehaviorEventsFunctionsProperParameters
+#define STATIC_GetAllObjectTypesUsingEventsBasedBehavior \
+  GetAllObjectTypesUsingEventsBasedBehavior
+#define STATIC_EnsureBehaviorEventsFunctionsProperParameters \
+  EnsureBehaviorEventsFunctionsProperParameters
 #define STATIC_CreateRectangle CreateRectangle
 #define STATIC_SanityCheckBehaviorProperty SanityCheckBehaviorProperty
 #define STATIC_SanityCheckObjectProperty SanityCheckObjectProperty
@@ -540,7 +556,8 @@ typedef ExtensionAndMetadata<ExpressionMetadata> ExtensionAndExpressionMetadata;
 #define STATIC_RenameEventsFunction RenameEventsFunction
 #define STATIC_RenameBehaviorEventsFunction RenameBehaviorEventsFunction
 #define STATIC_MoveEventsFunctionParameter MoveEventsFunctionParameter
-#define STATIC_MoveBehaviorEventsFunctionParameter MoveBehaviorEventsFunctionParameter
+#define STATIC_MoveBehaviorEventsFunctionParameter \
+  MoveBehaviorEventsFunctionParameter
 #define STATIC_RenameBehaviorProperty RenameBehaviorProperty
 #define STATIC_RenameEventsBasedBehavior RenameEventsBasedBehavior

@@ -552,7 +569,8 @@ typedef ExtensionAndMetadata<ExpressionMetadata> ExtensionAndExpressionMetadata;

 #define STATIC_CopyAllResourcesTo CopyAllResourcesTo

-#define STATIC_IsExtensionLifecycleEventsFunction IsExtensionLifecycleEventsFunction
+#define STATIC_IsExtensionLifecycleEventsFunction \
+  IsExtensionLifecycleEventsFunction

 #define STATIC_GetCompletionDescriptionsFor GetCompletionDescriptionsFor

@@ -0,0 +1,17 @@
+// Automatically generated by GDevelop.js/scripts/generate-types.js
+declare class gdDependencyMetadata {
+  constructor(): void;
+  getName(): string;
+  setName(name_: string): gdDependencyMetadata;
+  getExportName(): string;
+  setExportName(exportName_: string): gdDependencyMetadata;
+  getVersion(): string;
+  setVersion(version_: string): gdDependencyMetadata;
+  getDependencyType(): string;
+  setDependencyType(dependencyType_: string): gdDependencyMetadata;
+  getExtraSetting(settingName: string): gdPropertyDescriptor;
+  setExtraSetting(settingName: string, settingValue: gdPropertyDescriptor): gdDependencyMetadata;
+  getAllExtraSettings(): gdMapStringPropertyDescriptor;
+  delete(): void;
+  ptr: number;
+};
@@ -0,0 +1,11 @@
+// Automatically generated by GDevelop.js/scripts/generate-types.js
+declare class gdExtensionProperties {
+  getValue(extension: string, property: string): string;
+  setValue(extension: string, property: string, newValue: string): void;
+  hasProperty(extension: string, property: string): boolean;
+  getAllExtensionProperties(extension: string, project: gdProject): gdMapStringPropertyDescriptor;
+  serializeTo(element: gdSerializerElement): void;
+  unserializeFrom(element: gdSerializerElement): void;
+  delete(): void;
+  ptr: number;
+};
@@ -0,0 +1,17 @@
+// Automatically generated by GDevelop.js/scripts/generate-types.js
+// Automatically generated by GDevelop.js/scripts/generate-types.js
+// Automatically generated by GDevelop.js/scripts/generate-types.js
+// Automatically generated by GDevelop.js/scripts/generate-types.js
+// Automatically generated by GDevelop.js/scripts/generate-types.js
+// Automatically generated by GDevelop.js/scripts/generate-types.js
+// Automatically generated by GDevelop.js/scripts/generate-types.js
+// Automatically generated by GDevelop.js/scripts/generate-types.js
+// Automatically generated by GDevelop.js/scripts/generate-types.js
+declare class gdExtensionPropertiesManager {
+  getValue(extension: string, property: string): string;
+  setValue(extension: string, property: string, newValue: string): void;
+  hasProperty(extension: string, property: string): boolean;
+  getAllExtensionProperties(extension: string, project: gdProject): gdMapStringPropertyDescriptor;
+  delete(): void;
+  ptr: number;
+};
@@ -0,0 +1,9 @@
+// Automatically generated by GDevelop.js/scripts/generate-types.js
+declare class gdMapExtensionProperties {
+  get(name: string): gdMapStringPropertyDescriptor;
+  set(name: string, prop: gdMapStringPropertyDescriptor): void;
+  has(name: string): boolean;
+  keys(): gdVectorString;
+  delete(): void;
+  ptr: number;
+};
@@ -8,9 +8,11 @@ declare class gdPlatformExtension {
  addAction(name: string, fullname: string, description: string, sentence: string, group: string, icon: string, smallicon: string): gdInstructionMetadata;
  addExpression(name: string, fullname: string, description: string, group: string, smallicon: string): gdExpressionMetadata;
  addStrExpression(name: string, fullname: string, description: string, group: string, smallicon: string): gdExpressionMetadata;
+  addDependency(): gdDependencyMetadata;
  addBehavior(name: string, fullname: string, defaultName: string, description: string, group: string, icon24x24: string, className: string, instance: gdBehavior, sharedDatasInstance: gdBehaviorsSharedData): gdBehaviorMetadata;
  addObject(name: string, fullname: string, description: string, icon24x24: string, instance: gdObject): gdObjectMetadata;
  addEffect(name: string): gdEffectMetadata;
+  registerProperty(name: string): gdPropertyDescriptor;
  getFullName(): string;
  getName(): string;
  getDescription(): string;
@@ -38,6 +40,8 @@ declare class gdPlatformExtension {
  getAllConditionsForBehavior(autoType: string): gdMapStringInstructionMetadata;
  getAllExpressionsForBehavior(autoType: string): gdMapStringExpressionMetadata;
  getAllStrExpressionsForBehavior(autoType: string): gdMapStringExpressionMetadata;
+  getAllProperties(): gdMapStringPropertyDescriptor;
+  getAllDependencies(): gdVectorDependencyMetadata;
  static getNamespaceSeparator(): string;
  delete(): void;
  ptr: number;
@@ -11,8 +11,6 @@ declare class gdProject extends gdObjectsContainer {
  getPackageName(): string;
  setOrientation(orientation: string): void;
  getOrientation(): string;
-  setAdMobAppId(adMobAppId: string): void;
-  getAdMobAppId(): string;
  setProjectFile(file: string): void;
  getProjectFile(): string;
  setGameResolutionSize(width: number, height: number): void;
@@ -33,6 +31,7 @@ declare class gdProject extends gdObjectsContainer {
  setLastCompilationDirectory(path: string): void;
  getLastCompilationDirectory(): string;
  getUsedExtensions(): gdVectorString;
+  getExtensionProperties(): gdExtensionProperties;
  addPlatform(platform: gdPlatform): void;
  getCurrentPlatform(): gdPlatform;
  getPlatformSpecificAssets(): gdPlatformSpecificAssets;
@@ -15,6 +15,8 @@ declare class gdPropertyDescriptor {
  isHidden(): boolean;
  serializeTo(element: gdSerializerElement): void;
  unserializeFrom(element: gdSerializerElement): void;
+  serializeValuesTo(element: gdSerializerElement): void;
+  unserializeValuesFrom(element: gdSerializerElement): void;
  delete(): void;
  ptr: number;
 };
@@ -0,0 +1,7 @@
+// Automatically generated by GDevelop.js/scripts/generate-types.js
+declare class gdVectorDependencyMetadata {
+  size(): number;
+  at(index: number): gdDependencyMetadata;
+  delete(): void;
+  ptr: number;
+};
@@ -34,6 +34,7 @@ declare class libGDevelop {

  VectorString: Class<gdVectorString>;
  VectorPlatformExtension: Class<gdVectorPlatformExtension>;
+  VectorDependencyMetadata: Class<gdVectorDependencyMetadata>;
  MapStringString: Class<gdMapStringString>;
  MapStringBoolean: Class<gdMapStringBoolean>;
  MapStringDouble: Class<gdMapStringDouble>;
@@ -41,6 +42,7 @@ declare class libGDevelop {
  MapStringExpressionMetadata: Class<gdMapStringExpressionMetadata>;
  MapStringInstructionMetadata: Class<gdMapStringInstructionMetadata>;
  MapStringEventMetadata: Class<gdMapStringEventMetadata>;
+  MapExtensionProperties: Class<gdMapExtensionProperties>;
  SetString: Class<gdSetString>;
  ProjectHelper: Class<gdProjectHelper>;
  VersionWrapper: Class<gdVersionWrapper>;
@@ -55,6 +57,7 @@ declare class libGDevelop {
  LoadingScreen: Class<gdLoadingScreen>;
  ObjectsContainer: Class<gdObjectsContainer>;
  Project: Class<gdProject>;
+  ExtensionProperties: Class<gdExtensionProperties>;
  Behavior: Class<gdBehavior>;
  BehaviorJsImplementation: Class<gdBehaviorJsImplementation>;
  BehaviorContent: Class<gdBehaviorContent>;
@@ -96,6 +99,7 @@ declare class libGDevelop {
  ExpressionCodeGenerationInformation: Class<gdExpressionCodeGenerationInformation>;
  InstructionMetadata: Class<gdInstructionMetadata>;
  ExpressionMetadata: Class<gdExpressionMetadata>;
+  DependencyMetadata: Class<gdDependencyMetadata>;
  ParameterMetadata: Class<gdParameterMetadata>;
  VectorParameterMetadata: Class<gdVectorParameterMetadata>;
  ParameterMetadataTools: Class<gdParameterMetadataTools>;
@@ -127,6 +127,74 @@ Add an object using [`addObject`](https://docs.gdevelop-app.com/GDCore%20Documen

 > ℹ️ After doing this, you can actually see your object in GDevelop! Read the next sections to see how to add an editor and a renderer for instances on the scene editor.

+#### Declare a property
+
+A property is a global configuration value for your extension. An example would be the App ID for AdMob.
+
+To declare one, just use `registerProperty`: 
+```js
+// From ExampleJsExtension/JsExtension.js:
+extension.registerProperty("DummyPropertyString")
+  .setDescription(_("Dummy Property Name"))
+  .setType("string")
+  .setLabel("Type in anything :)");
+```
+
+Once declared, you can access the property from JavaScript in the game engine using `getExtensionProperty` method of `gdjs.RuntimeGame`. Pass the extension name and the property name. This would get the AdMobAppId property of the AdMob extension for example:
+```js
+const appId = runtimeGame.getExtensionProperty("AdMob", "AdMobAppId");
+```
+
+If the property doesn't exist it will return null. 
+⚠️ Be careful, it can be non existing if the user never entered a value for that property before!
+
+#### Declare a dependency on an external package
+
+You can declare a dependency on an npm package or cordova plugin with `addDependency`. Example:
+```js
+// From ExampleJsExtension/JsExtension.js:
+extension
+  .addDependency()
+  .setName("Thirteen Checker")
+  .setDependencyType("npm")
+  .setExportName("is-thirteen")
+  .setVersion("2.0.0");
+```
+
+On cordova you can add plugin variables as extra properties:
+```js
+extension.addDependency()
+  .setName("Some Cordova Extension")
+  .setDependencyType("cordova")
+  .setExportName("cordova-some-plugin")
+  .setVersion("1.0.0")
+  .setExtraSetting(
+    "VARIABLE_NAME",
+    new gd.PropertyDescriptor().setValue("42")
+  );
+```
+
+You can also use an extension property to determine the value of the plugin variable:
+```js
+// From AdMob/JsExtension.js:
+extension.registerProperty("AdMobAppId") // Remember Property Name
+      .setDescription("AdMob App ID")
+      .setType("string")
+      .setLabel("ca-app-pub-XXXXXXXXXXXXXXXX/YYYYYYYYYY");
+
+extension.addDependency()
+  .setName("AdMob Cordova Extension")
+  .setDependencyType("cordova")
+  .setExportName("cordova-plugin-admob-free")
+  .setVersion("~0.21.0")
+  .setExtraSetting(
+    "ADMOB_APP_ID", 
+    new gd.PropertyDescriptor()
+      .setType("ExtensionProperty") // Tell the exporter this is an extension property...
+      .setValue("AdMobAppId") // ... and what property it is (name of the property).
+  );
+```
+
 #### Declare an object editor

 To add an editor to your object, implement the function `registerEditorConfigurations` in your extension module. For now, only a default editor, displaying the object properties, is supported:
@@ -0,0 +1,70 @@
+// @flow
+import { Trans } from '@lingui/macro';
+
+import * as React from 'react';
+import Text from '../UI/Text';
+import { ColumnStackLayout } from '../UI/Layout';
+import PropertiesEditor from '../PropertiesEditor';
+import propertiesMapToSchema from '../PropertiesEditor/PropertiesMapToSchema';
+import { List } from '@material-ui/core';
+
+type Props = {|
+  project: gdProject,
+|};
+
+function ExtensionsProperties(props: Props) {
+  const { project } = props;
+  const allExtensions = project.getCurrentPlatform().getAllPlatformExtensions();
+  const propertyList = [];
+  for (let i = 0; i < allExtensions.size(); i++) {
+    const extension = allExtensions.at(i);
+    const properties = project
+      .getExtensionProperties()
+      .getAllExtensionProperties(extension.getName(), project);
+    if (properties.keys().size() === 0) continue;
+    const propertiesSchema = propertiesMapToSchema(
+      properties,
+      instance =>
+        project
+          .getExtensionProperties()
+          .getAllExtensionProperties(extension.getName(), project),
+      (instance, propertyName, newValue) => {
+        if (
+          project
+            .getExtensionProperties()
+            .getAllExtensionProperties(extension.getName(), project)
+            .get(propertyName)
+            .getType() === 'boolean'
+        ) {
+          project
+            .getExtensionProperties()
+            .setValue(
+              extension.getName(),
+              propertyName,
+              newValue === '1' ? 'true' : 'false'
+            );
+        } else {
+          project
+            .getExtensionProperties()
+            .setValue(extension.getName(), propertyName, newValue);
+        }
+      }
+    );
+
+    propertyList.push(
+      <ColumnStackLayout key={extension.getName()} noMargin>
+        <Text size="title">
+          <Trans>{extension.getFullName()}</Trans>
+        </Text>
+        <PropertiesEditor
+          schema={propertiesSchema}
+          instances={[extension.getAllProperties()]}
+        />
+      </ColumnStackLayout>
+    );
+  }
+
+  return propertyList.length ? <List>{propertyList}</List> : null;
+}
+
+export default ExtensionsProperties;
@@ -19,6 +19,8 @@ import DismissableAlertMessage from '../UI/DismissableAlertMessage';
 import HelpButton from '../UI/HelpButton';
 import { ResponsiveLineStackLayout, ColumnStackLayout } from '../UI/Layout';
 import Text from '../UI/Text';
+import ExtensionsProperties from './ExtensionsProperties';
+import { useSerializableObjectCancelableEditor } from '../Utils/SerializableObjectCancelableEditor';

 type Props = {|
  project: gdProject,
@@ -28,7 +30,7 @@ type Props = {|
  onChangeSubscription: () => void,
 |};

-type State = {|
+type ProjectProperties = {|
  gameResolutionWidth: number,
  gameResolutionHeight: number,
  adaptGameResolutionAtRuntime: boolean,
@@ -37,7 +39,6 @@ type State = {|
  version: string,
  packageName: string,
  orientation: string,
-  adMobAppId: string,
  scaleMode: string,
  sizeOnStartupMode: string,
  showGDevelopSplash: boolean,
@@ -46,417 +47,402 @@ type State = {|
  isFolderProject: boolean,
 |};

-class ProjectPropertiesDialog extends React.Component<Props, State> {
-  constructor(props: Props) {
-    super(props);
-    this.state = this._loadFrom(props.project);
-  }
-
-  _subscriptionChecker: ?SubscriptionChecker = null;
-
-  _loadFrom(project: gdProject): State {
-    return {
-      gameResolutionWidth: project.getGameResolutionWidth(),
-      gameResolutionHeight: project.getGameResolutionHeight(),
-      adaptGameResolutionAtRuntime: project.getAdaptGameResolutionAtRuntime(),
-      name: project.getName(),
-      author: project.getAuthor(),
-      version: project.getVersion(),
-      packageName: project.getPackageName(),
-      orientation: project.getOrientation(),
-      adMobAppId: project.getAdMobAppId(),
-      scaleMode: project.getScaleMode(),
-      sizeOnStartupMode: project.getSizeOnStartupMode(),
-      showGDevelopSplash: project.getLoadingScreen().isGDevelopSplashShown(),
-      minFPS: project.getMinimumFPS(),
-      maxFPS: project.getMaximumFPS(),
-      isFolderProject: project.isFolderProject(),
-    };
-  }
-
-  componentWillReceiveProps(newProps: Props) {
-    if (
-      (!this.props.open && newProps.open) ||
-      (newProps.open && this.props.project !== newProps.project)
-    ) {
-      this.setState(this._loadFrom(newProps.project));
-    }
-  }
-
-  _onApply = () => {
-    const t = str => str; //TODO
-    const { project } = this.props;
-    const {
-      gameResolutionWidth,
-      gameResolutionHeight,
-      adaptGameResolutionAtRuntime,
-      name,
-      author,
-      version,
-      packageName,
-      orientation,
-      adMobAppId,
-      scaleMode,
-      sizeOnStartupMode,
-      showGDevelopSplash,
-      minFPS,
-      maxFPS,
-      isFolderProject,
-    } = this.state;
-    project.setGameResolutionSize(gameResolutionWidth, gameResolutionHeight);
-    project.setAdaptGameResolutionAtRuntime(adaptGameResolutionAtRuntime);
-    project.setName(name);
-    project.setAuthor(author);
-    project.setVersion(version);
-    project.setPackageName(packageName);
-    project.setOrientation(orientation);
-    project.setAdMobAppId(adMobAppId);
-    project.setScaleMode(scaleMode);
-    project.setSizeOnStartupMode(sizeOnStartupMode);
-    project.setMinimumFPS(minFPS);
-    project.setMaximumFPS(maxFPS);
-    project.getLoadingScreen().showGDevelopSplash(showGDevelopSplash);
-    project.setFolderProject(isFolderProject);
-
-    if (!displayProjectErrorsBox(t, getErrors(t, project))) return;
-
-    this.props.onApply();
+function loadPropertiesFromProject(project: gdProject): ProjectProperties {
+  return {
+    gameResolutionWidth: project.getGameResolutionWidth(),
+    gameResolutionHeight: project.getGameResolutionHeight(),
+    adaptGameResolutionAtRuntime: project.getAdaptGameResolutionAtRuntime(),
+    name: project.getName(),
+    author: project.getAuthor(),
+    version: project.getVersion(),
+    packageName: project.getPackageName(),
+    orientation: project.getOrientation(),
+    scaleMode: project.getScaleMode(),
+    sizeOnStartupMode: project.getSizeOnStartupMode(),
+    showGDevelopSplash: project.getLoadingScreen().isGDevelopSplashShown(),
+    minFPS: project.getMinimumFPS(),
+    maxFPS: project.getMaximumFPS(),
+    isFolderProject: project.isFolderProject(),
  };
+}

-  render() {
-    const {
-      name,
-      gameResolutionWidth,
-      gameResolutionHeight,
-      adaptGameResolutionAtRuntime,
-      author,
-      version,
-      packageName,
-      orientation,
-      adMobAppId,
-      scaleMode,
-      sizeOnStartupMode,
-      showGDevelopSplash,
-      minFPS,
-      maxFPS,
-      isFolderProject,
-    } = this.state;
+function applyPropertiesToProject(
+  project: gdProject,
+  newProperties: ProjectProperties
+) {
+  const t = str => str; //TODO
+  const {
+    gameResolutionWidth,
+    gameResolutionHeight,
+    adaptGameResolutionAtRuntime,
+    name,
+    author,
+    version,
+    packageName,
+    orientation,
+    scaleMode,
+    sizeOnStartupMode,
+    showGDevelopSplash,
+    minFPS,
+    maxFPS,
+    isFolderProject,
+  } = newProperties;
+  project.setGameResolutionSize(gameResolutionWidth, gameResolutionHeight);
+  project.setAdaptGameResolutionAtRuntime(adaptGameResolutionAtRuntime);
+  project.setName(name);
+  project.setAuthor(author);
+  project.setVersion(version);
+  project.setPackageName(packageName);
+  project.setOrientation(orientation);
+  project.setScaleMode(scaleMode);
+  project.setSizeOnStartupMode(sizeOnStartupMode);
+  project.setMinimumFPS(minFPS);
+  project.setMaximumFPS(maxFPS);
+  project.getLoadingScreen().showGDevelopSplash(showGDevelopSplash);
+  project.setFolderProject(isFolderProject);

-    const defaultPackageName = 'com.example.mygame';
-    const admobHint = 'ca-app-pub-XXXXXXXXXXXXXXXX/YYYYYYYYYY';
-    const defaultVersion = '1.0.0';
+  return displayProjectErrorsBox(t, getErrors(t, project));
+}

-    return (
-      <React.Fragment>
-        <Dialog
-          actions={[
-            <FlatButton
-              label={<Trans>Cancel</Trans>}
-              primary={false}
-              onClick={this.props.onClose}
-              key="cancel"
-            />,
-            <FlatButton
-              label={<Trans>Apply</Trans>}
-              primary={true}
-              onClick={this._onApply}
-              key="apply"
-            />,
-          ]}
-          secondaryActions={[
-            <HelpButton
-              helpPagePath="/interface/project-manager/properties"
-              key="help"
-            />,
-          ]}
-          title={<Trans>Project properties</Trans>}
-          cannotBeDismissed={true}
-          open={this.props.open}
-          onRequestClose={this.props.onClose}
-        >
-          <ColumnStackLayout noMargin>
-            <SemiControlledTextField
-              floatingLabelText={<Trans>Game name</Trans>}
-              fullWidth
-              type="text"
-              value={name}
-              onChange={value => this.setState({ name: value })}
-              autoFocus
-            />
-            <Checkbox
-              label={
-                <Trans>
-                  Display GDevelop splash at startup (in exported game)
-                </Trans>
-              }
-              checked={showGDevelopSplash}
-              onCheck={(e, checked) => {
-                if (!checked) {
-                  if (
-                    this._subscriptionChecker &&
-                    !this._subscriptionChecker.checkHasSubscription()
-                  )
-                    return;
-                }
+function ProjectPropertiesDialog(props: Props) {
+  const { project } = props;

-                this.setState({
-                  showGDevelopSplash: checked,
-                });
-              }}
-            />
-            <SemiControlledTextField
-              floatingLabelText={<Trans>Version number (X.Y.Z)</Trans>}
-              fullWidth
-              hintText={defaultVersion}
-              type="text"
-              value={version}
-              onChange={value => this.setState({ version: value })}
-            />
-            <SemiControlledTextField
-              floatingLabelText={
-                <Trans>Package name (for iOS and Android)</Trans>
-              }
-              fullWidth
-              hintText={defaultPackageName}
-              type="text"
-              value={packageName}
-              onChange={value => this.setState({ packageName: value })}
-              errorText={
-                validatePackageName(packageName) ? (
-                  undefined
-                ) : (
-                  <Trans>
-                    The package name is containing invalid characters or not
-                    following the convention "xxx.yyy.zzz" (numbers allowed
-                    after a letter only).
-                  </Trans>
+  const subscriptionChecker = React.useRef<?SubscriptionChecker>(null);
+
+  const initialProperties = React.useMemo(
+    () => loadPropertiesFromProject(project),
+    [project]
+  );
+  let [name, setName] = React.useState(initialProperties.name);
+  let [gameResolutionWidth, setGameResolutionWidth] = React.useState(
+    initialProperties.gameResolutionWidth
+  );
+  let [gameResolutionHeight, setGameResolutionHeight] = React.useState(
+    initialProperties.gameResolutionHeight
+  );
+  let [
+    adaptGameResolutionAtRuntime,
+    setAdaptGameResolutionAtRuntime,
+  ] = React.useState(initialProperties.adaptGameResolutionAtRuntime);
+  let [author, setAuthor] = React.useState(initialProperties.author);
+  let [version, setVersion] = React.useState(initialProperties.version);
+  let [packageName, setPackageName] = React.useState(
+    initialProperties.packageName
+  );
+  let [orientation, setOrientation] = React.useState(
+    initialProperties.orientation
+  );
+  let [scaleMode, setScaleMode] = React.useState(initialProperties.scaleMode);
+  let [sizeOnStartupMode, setSizeOnStartupMode] = React.useState(
+    initialProperties.sizeOnStartupMode
+  );
+  let [showGDevelopSplash, setShowGDevelopSplash] = React.useState(
+    initialProperties.showGDevelopSplash
+  );
+  let [minFPS, setMinFPS] = React.useState(initialProperties.minFPS);
+  let [maxFPS, setMaxFPS] = React.useState(initialProperties.maxFPS);
+  let [isFolderProject, setIsFolderProject] = React.useState(
+    initialProperties.isFolderProject
+  );
+
+  const defaultPackageName = 'com.example.mygame';
+  const defaultVersion = '1.0.0';
+
+  const onCancelChanges = useSerializableObjectCancelableEditor({
+    serializableObject: project.getExtensionProperties(),
+    onCancel: props.onClose,
+  });
+
+  return (
+    <React.Fragment>
+      <Dialog
+        actions={[
+          <FlatButton
+            label={<Trans>Cancel</Trans>}
+            primary={false}
+            onClick={onCancelChanges}
+            key="cancel"
+          />,
+          <FlatButton
+            label={<Trans>Apply</Trans>}
+            primary={true}
+            onClick={() => {
+              if (
+                applyPropertiesToProject(project, {
+                  gameResolutionWidth,
+                  gameResolutionHeight,
+                  adaptGameResolutionAtRuntime,
+                  name,
+                  author,
+                  version,
+                  packageName,
+                  orientation,
+                  scaleMode,
+                  sizeOnStartupMode,
+                  showGDevelopSplash,
+                  minFPS,
+                  maxFPS,
+                  isFolderProject,
+                })
+              )
+                props.onApply();
+            }}
+            key="apply"
+          />,
+        ]}
+        secondaryActions={[
+          <HelpButton
+            helpPagePath="/interface/project-manager/properties"
+            key="help"
+          />,
+        ]}
+        title={<Trans>Project properties</Trans>}
+        cannotBeDismissed={true}
+        open={props.open}
+        onRequestClose={props.onClose}
+      >
+        <ColumnStackLayout noMargin>
+          <SemiControlledTextField
+            floatingLabelText={<Trans>Game name</Trans>}
+            fullWidth
+            type="text"
+            value={name}
+            onChange={setName}
+            autoFocus
+          />
+          <Checkbox
+            label={
+              <Trans>
+                Display GDevelop splash at startup (in exported game)
+              </Trans>
+            }
+            checked={showGDevelopSplash}
+            onCheck={(e, checked) => {
+              if (!checked) {
+                if (
+                  subscriptionChecker.current &&
+                  !subscriptionChecker.current.checkHasSubscription()
                )
+                  return;
+              }
+
+              setShowGDevelopSplash(checked);
+            }}
+          />
+          <SemiControlledTextField
+            floatingLabelText={<Trans>Version number (X.Y.Z)</Trans>}
+            fullWidth
+            hintText={defaultVersion}
+            type="text"
+            value={version}
+            onChange={setVersion}
+          />
+          <SemiControlledTextField
+            floatingLabelText={
+              <Trans>Package name (for iOS and Android)</Trans>
+            }
+            fullWidth
+            hintText={defaultPackageName}
+            type="text"
+            value={packageName}
+            onChange={setPackageName}
+            errorText={
+              validatePackageName(packageName) ? (
+                undefined
+              ) : (
+                <Trans>
+                  The package name is containing invalid characters or not
+                  following the convention "xxx.yyy.zzz" (numbers allowed after
+                  a letter only).
+                </Trans>
+              )
+            }
+          />
+          <SemiControlledTextField
+            floatingLabelText={<Trans>Author name</Trans>}
+            fullWidth
+            hintText={t`Your name`}
+            type="text"
+            value={author}
+            onChange={setAuthor}
+          />
+          <Text size="title">
+            <Trans>Resolution and rendering</Trans>
+          </Text>
+          <ResponsiveLineStackLayout noMargin>
+            <SemiControlledTextField
+              floatingLabelText={<Trans>Game resolution width</Trans>}
+              fullWidth
+              type="number"
+              value={'' + gameResolutionWidth}
+              onChange={value =>
+                setGameResolutionWidth(Math.max(1, parseInt(value, 10)))
              }
            />
            <SemiControlledTextField
-              floatingLabelText={<Trans>Author name</Trans>}
+              floatingLabelText={<Trans>Game resolution height</Trans>}
              fullWidth
-              hintText={t`Your name`}
-              type="text"
-              value={author}
-              onChange={value => this.setState({ author: value })}
+              type="number"
+              value={'' + gameResolutionHeight}
+              onChange={value =>
+                setGameResolutionHeight(Math.max(1, parseInt(value, 10)))
+              }
            />
-            <Text size="title">
-              <Trans>Resolution and rendering</Trans>
-            </Text>
-            <ResponsiveLineStackLayout noMargin>
-              <SemiControlledTextField
-                floatingLabelText={<Trans>Game resolution width</Trans>}
-                fullWidth
-                type="number"
-                value={'' + gameResolutionWidth}
-                onChange={value =>
-                  this.setState({
-                    gameResolutionWidth: Math.max(1, parseInt(value, 10)),
-                  })
-                }
-              />
-              <SemiControlledTextField
-                floatingLabelText={<Trans>Game resolution height</Trans>}
-                fullWidth
-                type="number"
-                value={'' + gameResolutionHeight}
-                onChange={value =>
-                  this.setState({
-                    gameResolutionHeight: Math.max(1, parseInt(value, 10)),
-                  })
-                }
-              />
-            </ResponsiveLineStackLayout>
-            <SelectField
-              fullWidth
-              floatingLabelText={
-                <Trans>
-                  Game resolution resize mode (fullscreen or window)
-                </Trans>
-              }
-              value={sizeOnStartupMode}
-              onChange={(e, i, value: string) =>
-                this.setState({ sizeOnStartupMode: value })
-              }
-            >
-              <SelectOption
-                value=""
-                primaryText={t`No changes to the game size`}
-              />
-              <SelectOption
-                value="adaptWidth"
-                primaryText={t`Change width to fit the screen or window size`}
-              />
-              <SelectOption
-                value="adaptHeight"
-                primaryText={t`Change height to fit the screen or window size`}
-              />
-            </SelectField>
-            <Checkbox
-              label={
-                <Trans>
-                  Update resolution during the game to fit the screen or window
-                  size
-                </Trans>
-              }
-              disabled={sizeOnStartupMode === ''}
-              checked={adaptGameResolutionAtRuntime}
-              onCheck={(e, checked) => {
-                this.setState({
-                  adaptGameResolutionAtRuntime: checked,
-                });
-              }}
+          </ResponsiveLineStackLayout>
+          <SelectField
+            fullWidth
+            floatingLabelText={
+              <Trans>Game resolution resize mode (fullscreen or window)</Trans>
+            }
+            value={sizeOnStartupMode}
+            onChange={(e, i, value: string) => setSizeOnStartupMode(value)}
+          >
+            <SelectOption
+              value=""
+              primaryText={t`No changes to the game size`}
            />
-            <ResponsiveLineStackLayout noMargin>
-              <SemiControlledTextField
-                floatingLabelText={<Trans>Minimum FPS</Trans>}
-                fullWidth
-                type="number"
-                value={'' + minFPS}
-                onChange={value =>
-                  this.setState({
-                    minFPS: Math.max(0, parseInt(value, 10)),
-                  })
-                }
-              />
-              <SemiControlledTextField
-                floatingLabelText={<Trans>Maximum FPS (0 to disable)</Trans>}
-                fullWidth
-                type="number"
-                value={'' + maxFPS}
-                onChange={value =>
-                  this.setState({
-                    maxFPS: Math.max(0, parseInt(value, 10)),
-                  })
-                }
-              />
-            </ResponsiveLineStackLayout>
-            {maxFPS > 0 && maxFPS < 60 && (
-              <DismissableAlertMessage
-                identifier="maximum-fps-too-low"
-                kind="warning"
-              >
-                <Trans>
-                  Most monitors have a refresh rate of 60 FPS. Setting a maximum
-                  number of FPS under 60 will force the game to skip frames, and
-                  the real number of FPS will be way below 60, making the game
-                  laggy and impacting the gameplay negatively. Consider putting
-                  60 or more for the maximum number or FPS, or disable it by
-                  setting 0.
-                </Trans>
-              </DismissableAlertMessage>
-            )}
-            {minFPS < 20 && (
-              <DismissableAlertMessage
-                identifier="minimum-fps-too-low"
-                kind="warning"
-              >
-                <Trans>
-                  Setting the minimum number of FPS below 20 will increase a lot
-                  the time that is allowed between the simulation of two frames
-                  of the game. If case of a sudden slowdown, or on slow
-                  computers, this can create buggy behaviors like objects
-                  passing beyond a wall. Consider setting 20 as the minimum FPS.
-                </Trans>
-              </DismissableAlertMessage>
-            )}
-            <SelectField
-              fullWidth
-              floatingLabelText={
-                <Trans>Device orientation (for iOS and Android)</Trans>
-              }
-              value={orientation}
-              onChange={(e, i, value: string) =>
-                this.setState({ orientation: value })
-              }
-            >
-              <SelectOption value="default" primaryText={t`Platform default`} />
-              <SelectOption value="landscape" primaryText={t`Landscape`} />
-              <SelectOption value="portrait" primaryText={t`Portrait`} />
-            </SelectField>
-            <SelectField
-              fullWidth
-              floatingLabelText={
-                <Trans>Scale mode (also called "Sampling")</Trans>
-              }
-              value={scaleMode}
-              onChange={(e, i, value: string) =>
-                this.setState({ scaleMode: value })
-              }
-            >
-              <SelectOption
-                value="linear"
-                primaryText={t`Linear (antialiased rendering, good for most games)`}
-              />
-              <SelectOption
-                value="nearest"
-                primaryText={t`Nearest (no antialiasing, good for pixel perfect games)`}
-              />
-            </SelectField>
-            {scaleMode === 'nearest' && (
-              <DismissableAlertMessage
-                identifier="use-non-smoothed-textures"
-                kind="info"
-              >
-                <Trans>
-                  To obtain the best pixel-perfect effect possible, go in the
-                  resources editor and disable the Smoothing for all images of
-                  your game. It will be done automatically for new images added
-                  from now.
-                </Trans>
-              </DismissableAlertMessage>
-            )}
-            <Text size="title">
-              <Trans>AdMob</Trans>
-            </Text>
+            <SelectOption
+              value="adaptWidth"
+              primaryText={t`Change width to fit the screen or window size`}
+            />
+            <SelectOption
+              value="adaptHeight"
+              primaryText={t`Change height to fit the screen or window size`}
+            />
+          </SelectField>
+          <Checkbox
+            label={
+              <Trans>
+                Update resolution during the game to fit the screen or window
+                size
+              </Trans>
+            }
+            disabled={sizeOnStartupMode === ''}
+            checked={adaptGameResolutionAtRuntime}
+            onCheck={(e, checked) => setAdaptGameResolutionAtRuntime(checked)}
+          />
+          <ResponsiveLineStackLayout noMargin>
            <SemiControlledTextField
-              floatingLabelText={
-                <Trans>AdMob application ID (for iOS and Android)</Trans>
-              }
+              floatingLabelText={<Trans>Minimum FPS</Trans>}
              fullWidth
-              hintText={admobHint}
-              type="text"
-              value={adMobAppId}
-              onChange={value => this.setState({ adMobAppId: value })}
+              type="number"
+              value={'' + minFPS}
+              onChange={value => setMinFPS(Math.max(0, parseInt(value, 10)))}
            />
-            <Text size="title">
-              <Trans>Project files</Trans>
-            </Text>
-            <SelectField
+            <SemiControlledTextField
+              floatingLabelText={<Trans>Maximum FPS (0 to disable)</Trans>}
              fullWidth
-              floatingLabelText={<Trans>Project file type</Trans>}
-              value={isFolderProject ? 'folder-project' : 'single-file'}
-              onChange={(e, i, value: string) =>
-                this.setState({ isFolderProject: value === 'folder-project' })
-              }
+              type="number"
+              value={'' + maxFPS}
+              onChange={value => setMaxFPS(Math.max(0, parseInt(value, 10)))}
+            />
+          </ResponsiveLineStackLayout>
+          {maxFPS > 0 && maxFPS < 60 && (
+            <DismissableAlertMessage
+              identifier="maximum-fps-too-low"
+              kind="warning"
            >
-              <SelectOption
-                value={'single-file'}
-                primaryText={t`Single file (default)`}
-              />
-              <SelectOption
-                value={'folder-project'}
-                primaryText={t`Multiple files, saved in folder next to the main file`}
-              />
-            </SelectField>
-          </ColumnStackLayout>
-        </Dialog>
-        <SubscriptionChecker
-          ref={subscriptionChecker =>
-            (this._subscriptionChecker = subscriptionChecker)
-          }
-          onChangeSubscription={() => {
-            this.props.onClose();
-            this.props.onChangeSubscription();
-          }}
-          mode="mandatory"
-          id="Disable GDevelop splash at startup"
-          title={<Trans>Disable GDevelop splash at startup</Trans>}
-        />
-      </React.Fragment>
-    );
-  }
+              <Trans>
+                Most monitors have a refresh rate of 60 FPS. Setting a maximum
+                number of FPS under 60 will force the game to skip frames, and
+                the real number of FPS will be way below 60, making the game
+                laggy and impacting the gameplay negatively. Consider putting 60
+                or more for the maximum number or FPS, or disable it by setting
+                0.
+              </Trans>
+            </DismissableAlertMessage>
+          )}
+          {minFPS < 20 && (
+            <DismissableAlertMessage
+              identifier="minimum-fps-too-low"
+              kind="warning"
+            >
+              <Trans>
+                Setting the minimum number of FPS below 20 will increase a lot
+                the time that is allowed between the simulation of two frames of
+                the game. If case of a sudden slowdown, or on slow computers,
+                this can create buggy behaviors like objects passing beyond a
+                wall. Consider setting 20 as the minimum FPS.
+              </Trans>
+            </DismissableAlertMessage>
+          )}
+          <SelectField
+            fullWidth
+            floatingLabelText={
+              <Trans>Device orientation (for iOS and Android)</Trans>
+            }
+            value={orientation}
+            onChange={(e, i, value: string) => setOrientation(value)}
+          >
+            <SelectOption value="default" primaryText={t`Platform default`} />
+            <SelectOption value="landscape" primaryText={t`Landscape`} />
+            <SelectOption value="portrait" primaryText={t`Portrait`} />
+          </SelectField>
+          <SelectField
+            fullWidth
+            floatingLabelText={
+              <Trans>Scale mode (also called "Sampling")</Trans>
+            }
+            value={scaleMode}
+            onChange={(e, i, value: string) => setScaleMode(value)}
+          >
+            <SelectOption
+              value="linear"
+              primaryText={t`Linear (antialiased rendering, good for most games)`}
+            />
+            <SelectOption
+              value="nearest"
+              primaryText={t`Nearest (no antialiasing, good for pixel perfect games)`}
+            />
+          </SelectField>
+          {scaleMode === 'nearest' && (
+            <DismissableAlertMessage
+              identifier="use-non-smoothed-textures"
+              kind="info"
+            >
+              <Trans>
+                To obtain the best pixel-perfect effect possible, go in the
+                resources editor and disable the Smoothing for all images of
+                your game. It will be done automatically for new images added
+                from now.
+              </Trans>
+            </DismissableAlertMessage>
+          )}
+          <Text size="title">
+            <Trans>Project files</Trans>
+          </Text>
+          <SelectField
+            fullWidth
+            floatingLabelText={<Trans>Project file type</Trans>}
+            value={isFolderProject ? 'folder-project' : 'single-file'}
+            onChange={(e, i, value: string) =>
+              setIsFolderProject(value === 'folder-project')
+            }
+          >
+            <SelectOption
+              value={'single-file'}
+              primaryText={t`Single file (default)`}
+            />
+            <SelectOption
+              value={'folder-project'}
+              primaryText={t`Multiple files, saved in folder next to the main file`}
+            />
+          </SelectField>
+        </ColumnStackLayout>
+        <ExtensionsProperties project={project} />
+      </Dialog>
+      <SubscriptionChecker
+        ref={subscriptionChecker}
+        onChangeSubscription={() => {
+          props.onClose();
+          props.onChangeSubscription();
+        }}
+        mode="mandatory"
+        id="Disable GDevelop splash at startup"
+        title={<Trans>Disable GDevelop splash at startup</Trans>}
+      />
+    </React.Fragment>
+  );
 }

 export default ProjectPropertiesDialog;