Create ScriptsInitializer PoC

app/src/main/java/com/bartlomiejpluta/ttsserver/initializer/ScriptsInitializer.kt

@@ -0,0 +1,55 @@
+package com.bartlomiejpluta.ttsserver.initializer
+
+import android.content.Context
+import android.content.SharedPreferences
+import com.bartlomiejpluta.R
+import java.io.BufferedInputStream
+import java.io.File
+import java.io.FileOutputStream
+
+class ScriptsInitializer(private val context: Context, private val preferences: SharedPreferences) {
+   private val endpointsDirectory: File?
+      get() = context.getExternalFilesDir("endpoints")
+
+   private val configDirectory: File?
+      get() = context.getExternalFilesDir("config")
+
+   fun initializeOnce() {
+      if(!preferences.getBoolean(INITIALIZED_FLAG, false)) {
+         initialize()
+
+         preferences.edit().apply {
+            putBoolean(INITIALIZED_FLAG, true)
+            apply()
+         }
+      }
+   }
+
+   fun initialize() {
+      endpointsDirectory?.listFiles()?.forEach { it.delete() }
+      configDirectory?.listFiles()?.forEach { it.delete() }
+      initializeConfig()
+      initializeEndpoints()
+   }
+
+   private fun initializeConfig() =
+      saveToFile("config.lua", configDirectory, R.raw.config)
+
+   private fun initializeEndpoints() =
+      endpoints.forEach { saveToFile(it.key, endpointsDirectory, it.value) }
+
+   private fun saveToFile(fileName: String, directory: File?, resourceId: Int) {
+      BufferedInputStream(context.resources.openRawResource(resourceId)).use { input ->
+         FileOutputStream(File(directory, fileName)).use { output ->
+            input.copyTo(output)
+         }
+      }
+   }
+
+   companion object {
+      private const val INITIALIZED_FLAG = "flag_initialized"
+      private val endpoints = mapOf(
+         "say.lua" to R.raw.say
+      )
+   }
+}