Add custom header to RetroAchievements API requests

Fixes API requests returning 403

app/src/main/java/me/magnum/melonds/common/network/MelonOkHttpInterceptor.kt

@@ -0,0 +1,28 @@
+package me.magnum.melonds.common.network
+
+import android.content.Context
+import okhttp3.Interceptor
+import okhttp3.Response
+
+class MelonOkHttpInterceptor(private val context: Context) : Interceptor {
+    private companion object {
+        const val USER_AGENT = "User-Agent"
+        const val MELON_USER_AGENT_PREFIX = "melonDS-android"
+    }
+
+    private val userAgentVersion by lazy {
+        val packageInfo = context.packageManager.getPackageInfo(context.packageName, 0)
+        val appVersion = packageInfo.versionName
+        val userAgentSuffix = appVersion.lowercase().replace(' ', '-').replace("(", "").replace(")", "")
+        "$MELON_USER_AGENT_PREFIX/$userAgentSuffix"
+    }
+
+    override fun intercept(chain: Interceptor.Chain): Response {
+        val newRequest = chain.request()
+            .newBuilder()
+            .addHeader(USER_AGENT, userAgentVersion)
+            .build()
+
+        return chain.proceed(newRequest)
+    }
+}

app/src/main/java/me/magnum/melonds/di/RAModule.kt

@@ -1,11 +1,14 @@
 package me.magnum.melonds.di
 
+import android.content.Context
 import android.content.SharedPreferences
 import com.google.gson.Gson
 import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
+import dagger.hilt.android.qualifiers.ApplicationContext
 import dagger.hilt.components.SingletonComponent
+import me.magnum.melonds.common.network.MelonOkHttpInterceptor
 import me.magnum.melonds.common.retroachievements.AndroidRAAchievementSignatureProvider
 import me.magnum.melonds.common.retroachievements.AndroidRAUserAuthStore
 import me.magnum.rcheevosapi.RAAchievementSignatureProvider
@@ -19,10 +22,17 @@ import javax.inject.Singleton
 @InstallIn(SingletonComponent::class)
 object RAModule {
 
+    @Provides
+    fun provideMelonOkHttpInterceptor(@ApplicationContext context: Context): MelonOkHttpInterceptor {
+        return MelonOkHttpInterceptor(context)
+    }
+
     @Provides
     @Named("ra-api-client")
-    fun provideRAApiOkHttpClient(): OkHttpClient {
-        return OkHttpClient.Builder().build()
+    fun provideRAApiOkHttpClient(melonOkHttpInterceptor: MelonOkHttpInterceptor): OkHttpClient {
+        return OkHttpClient.Builder()
+            .addInterceptor(melonOkHttpInterceptor)
+            .build()
     }
 
     @Provides

rcheevos-api/src/main/java/me/magnum/rcheevosapi/RAApi.kt

@@ -47,7 +47,7 @@ class RAApi(
         private const val VALUE_HARDMODE_DISABLED = "0"
         private const val VALUE_HARDMODE_ENABLED = "1"
 
-        private const val REQUEST_LOGIN = "login"
+        private const val REQUEST_LOGIN = "login2"
         private const val REQUEST_HASH_LIBRARY = "hashlibrary"
         private const val REQUEST_GAME_DATA = "patch"
         private const val REQUEST_USER_UNLOCKED_ACHIEVEMENTS = "unlocks"