desktop: run with postgres backend (#5604)

* desktop: postgres

* update

* update

* params, instruction

* script passes (app doesn't build)

* fix script

apps/multiplatform/common/build.gradle.kts

@@ -154,6 +154,7 @@ buildConfig {
     buildConfigField("int", "ANDROID_VERSION_CODE", "${extra["android.version_code"]}")
     buildConfigField("String", "DESKTOP_VERSION_NAME", "\"${extra["desktop.version_name"]}\"")
     buildConfigField("int", "DESKTOP_VERSION_CODE", "${extra["desktop.version_code"]}")
+    buildConfigField("String", "DATABASE_BACKEND", "\"${extra["database.backend"]}\"")
   }
 }
 

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/platform/AppCommon.kt

@@ -28,6 +28,8 @@ val appVersionInfo: Pair<String, Int?> = if (appPlatform == AppPlatform.ANDROID)
 else
   BuildConfigCommon.DESKTOP_VERSION_NAME to BuildConfigCommon.DESKTOP_VERSION_CODE
 
+val databaseBackend: String = if (appPlatform == AppPlatform.ANDROID) "sqlite" else BuildConfigCommon.DATABASE_BACKEND
+
 class FifoQueue<E>(private var capacity: Int) : LinkedList<E>() {
   override fun add(element: E): Boolean {
     if(size > capacity) removeFirst()

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/platform/Core.kt

@@ -63,7 +63,11 @@ suspend fun initChatController(useKey: String? = null, confirmMigrations: Migrat
     }
     val dbKey = useKey ?: DatabaseUtils.useDatabaseKey()
     val confirm = confirmMigrations ?: if (appPreferences.developerTools.get() && appPreferences.confirmDBUpgrades.get()) MigrationConfirmation.Error else MigrationConfirmation.YesUp
-    var migrated: Array<Any> = chatMigrateInit(dbAbsolutePrefixPath, dbKey, MigrationConfirmation.Error.value)
+    var migrated: Array<Any> = if (databaseBackend == "postgres") {
+      chatMigrateInit("simplex_v1", "postgresql://simplex@/simplex_v1", MigrationConfirmation.Error.value)
+    } else {
+      chatMigrateInit(dbAbsolutePrefixPath, dbKey, MigrationConfirmation.Error.value)
+    }
     var res: DBMigrationResult = runCatching {
       json.decodeFromString<DBMigrationResult>(migrated[0] as String)
     }.getOrElse { DBMigrationResult.Unknown(migrated[0] as String) }

apps/multiplatform/gradle.properties

@@ -33,3 +33,6 @@ desktop.version_code=90
 kotlin.version=1.9.23
 gradle.plugin.version=8.2.0
 compose.version=1.7.0
+
+# Choose sqlite or postgres backend
+database.backend=sqlite