Bug 1092953: show a modal confirm dialog when a user attempts to delete a room. r=paolo

browser/components/loop/MozLoopAPI.jsm

@@ -365,21 +365,31 @@ function injectLoopAPI(targetWindow) {
     /**
      * Displays a confirmation dialog using the specified strings.
      *
-     * Callback parameters:
+     * @param {Object}   options  Confirm dialog options
-     * - err null on success, non-null on unexpected failure to show the prompt.
+     * @param {Function} callback Function that will be invoked once the operation
-     * - {Boolean} True if the user chose the OK button.
+     *                            finished. The first argument passed will be an
+     *                            `Error` object or `null`. The second argument
+     *                            will be the result of the operation, TRUE if
+     *                            the user chose the OK button.
      */
     confirm: {
       enumerable: true,
       writable: true,
-      value: function(bodyMessage, okButtonMessage, cancelButtonMessage, callback) {
+      value: function(options, callback) {
-        try {
+        let buttonFlags;
-          let buttonFlags =
+        if (options.okButton && options.cancelButton) {
+          buttonFlags =
             (Ci.nsIPrompt.BUTTON_POS_0 * Ci.nsIPrompt.BUTTON_TITLE_IS_STRING) +
             (Ci.nsIPrompt.BUTTON_POS_1 * Ci.nsIPrompt.BUTTON_TITLE_IS_STRING);
+        } else if (!options.okButton && !options.cancelButton) {
+          buttonFlags = Services.prompt.STD_YES_NO_BUTTONS;
+        } else {
+          callback(cloneValueInto(new Error("confirm: missing button options"), targetWindow));
+        }
 
+        try {
           let chosenButton = Services.prompt.confirmEx(null, "",
-            bodyMessage, buttonFlags, okButtonMessage, cancelButtonMessage,
+            options.message, buttonFlags, options.okButton, options.cancelButton,
             null, null, {});
 
           callback(null, chosenButton == 0);

browser/components/loop/content/js/contacts.js

@@ -403,11 +403,11 @@ loop.contacts = (function(_, mozL10n) {
           this.props.startForm("contacts_edit", contact);
           break;
         case "remove":
-          navigator.mozLoop.confirm(
+          navigator.mozLoop.confirm({
-            mozL10n.get("confirm_delete_contact_alert"),
+            message: mozL10n.get("confirm_delete_contact_alert"),
-            mozL10n.get("confirm_delete_contact_remove_button"),
+            okButton: mozL10n.get("confirm_delete_contact_remove_button"),
-            mozL10n.get("confirm_delete_contact_cancel_button"),
+            cancelButton: mozL10n.get("confirm_delete_contact_cancel_button")
-            (err, result) => {
+          }, (err, result) => {
             if (err) {
               throw err;
             }

browser/components/loop/content/js/contacts.jsx

@@ -403,11 +403,11 @@ loop.contacts = (function(_, mozL10n) {
           this.props.startForm("contacts_edit", contact);
           break;
         case "remove":
-          navigator.mozLoop.confirm(
+          navigator.mozLoop.confirm({
-            mozL10n.get("confirm_delete_contact_alert"),
+            message: mozL10n.get("confirm_delete_contact_alert"),
-            mozL10n.get("confirm_delete_contact_remove_button"),
+            okButton: mozL10n.get("confirm_delete_contact_remove_button"),
-            mozL10n.get("confirm_delete_contact_cancel_button"),
+            cancelButton: mozL10n.get("confirm_delete_contact_cancel_button")
-            (err, result) => {
+          }, (err, result) => {
             if (err) {
               throw err;
             }

browser/components/loop/content/js/panel.js

@@ -617,10 +617,23 @@ loop.panel = (function(_, mozL10n) {
     handleDeleteButtonClick: function(event) {
       event.stopPropagation();
       event.preventDefault();
-      // XXX We should prompt end user for confirmation; see bug 1092953.
+      navigator.mozLoop.confirm({
+        message: mozL10n.get("rooms_list_deleteConfirmation_label"),
+        okButton: null,
+        cancelButton: null
+      }, function(err, result) {
+        if (err) {
+          throw err;
+        }
+
+        if (!result) {
+          return;
+        }
+
         this.props.dispatcher.dispatch(new sharedActions.DeleteRoom({
           roomToken: this.props.room.roomToken
         }));
+      }.bind(this));
     },
 
     renameRoom: function(newRoomName) {

browser/components/loop/content/js/panel.jsx

@@ -617,10 +617,23 @@ loop.panel = (function(_, mozL10n) {
     handleDeleteButtonClick: function(event) {
       event.stopPropagation();
       event.preventDefault();
-      // XXX We should prompt end user for confirmation; see bug 1092953.
+      navigator.mozLoop.confirm({
+        message: mozL10n.get("rooms_list_deleteConfirmation_label"),
+        okButton: null,
+        cancelButton: null
+      }, function(err, result) {
+        if (err) {
+          throw err;
+        }
+
+        if (!result) {
+          return;
+        }
+
         this.props.dispatcher.dispatch(new sharedActions.DeleteRoom({
           roomToken: this.props.room.roomToken
         }));
+      }.bind(this));
     },
 
     renameRoom: function(newRoomName) {