Add support for global config.lua file

app/src/main/java/com/bartlomiejpluta/ttsserver/core/lua/loader/ConfigLoader.kt

@@ -0,0 +1,25 @@
+package com.bartlomiejpluta.ttsserver.core.lua.loader
+
+import android.content.Context
+import org.luaj.vm2.Globals
+import org.luaj.vm2.LuaTable
+import org.luaj.vm2.LuaValue
+import org.luaj.vm2.lib.TwoArgFunction
+import java.io.File
+
+class ConfigLoader(context: Context) {
+   private val configDirectory = context.getExternalFilesDir("config")
+
+   fun loadConfig(env: Globals) {
+      val configFile = File(configDirectory, "config.lua")
+      val table = env.loadfile(configFile.absolutePath).call().checktable()
+      env.load(ConfigLibrary(table))
+   }
+
+   class ConfigLibrary(private val table: LuaTable) : TwoArgFunction() {
+      override fun call(modname: LuaValue, env: LuaValue): LuaValue {
+         env.set("config", table)
+         return LuaValue.NIL
+      }
+   }
+}

app/src/main/java/com/bartlomiejpluta/ttsserver/core/lua/loader/EndpointLoader.kt

@@ -20,7 +20,7 @@ class EndpointLoader(
 ) {
 
    fun loadEndpoints(): List<Endpoint> {
-      val scripts = context.getExternalFilesDir("Endpoints")?.listFiles() ?: emptyArray()
+      val scripts = context.getExternalFilesDir("endpoints")?.listFiles() ?: emptyArray()
 
       return scripts.mapNotNull { loadEndpoint(it) }
    }

app/src/main/java/com/bartlomiejpluta/ttsserver/core/lua/sandbox/SandboxFactory.kt

@@ -1,6 +1,7 @@
 package com.bartlomiejpluta.ttsserver.core.lua.sandbox
 
 import com.bartlomiejpluta.ttsserver.core.lua.lib.*
+import com.bartlomiejpluta.ttsserver.core.lua.loader.ConfigLoader
 import org.luaj.vm2.Globals
 import org.luaj.vm2.LoadState
 import org.luaj.vm2.compiler.LuaC
@@ -12,6 +13,7 @@ import org.luaj.vm2.lib.jse.JseMathLib
 import org.luaj.vm2.lib.jse.JseOsLib
 
 class SandboxFactory(
+   private val configLoader: ConfigLoader,
    private val utilLibrary: UtilLibrary,
    private val serverLibrary: ServerLibrary,
    private val httpLibrary: HTTPLibrary,
@@ -32,5 +34,6 @@ class SandboxFactory(
       it.load(sonosLibrary)
       LoadState.install(it)
       LuaC.install(it)
+      configLoader.loadConfig(it)
    }
 }

app/src/main/java/com/bartlomiejpluta/ttsserver/core/web/endpoint/DefaultEndpoint.kt

@@ -28,7 +28,7 @@ class DefaultEndpoint(
    private fun provideResponse(response: LuaTable) = when (response.get("data")) {
       is LuaString -> getTextResponse(response)
       is LuaUserdata -> getFileResponse(response)
-      else -> throw IllegalArgumentException("Supported only string and file data types")
+      else -> throw LuaError("Supported only string and file response data types")
    }
 
    private fun getTextResponse(response: LuaTable) = newFixedLengthResponse(

app/src/main/java/com/bartlomiejpluta/ttsserver/di/module/LuaModule.kt

@@ -2,6 +2,7 @@ package com.bartlomiejpluta.ttsserver.di.module
 
 import android.content.Context
 import com.bartlomiejpluta.ttsserver.core.lua.lib.*
+import com.bartlomiejpluta.ttsserver.core.lua.loader.ConfigLoader
 import com.bartlomiejpluta.ttsserver.core.lua.loader.EndpointLoader
 import com.bartlomiejpluta.ttsserver.core.lua.sandbox.SandboxFactory
 import com.bartlomiejpluta.ttsserver.core.tts.engine.TTSEngine
@@ -18,16 +19,27 @@ class LuaModule {
    fun endpointLoader(context: Context, sandboxFactory: SandboxFactory) =
       EndpointLoader(context, sandboxFactory)
 
+   @Provides
+   @Singleton
+   fun configLoader(context: Context) = ConfigLoader(context)
+
    @Provides
    @Singleton
    fun sandboxFactory(
+      configLoader: ConfigLoader,
       utilLibrary: UtilLibrary,
       serverLibrary: ServerLibrary,
       httpLibrary: HTTPLibrary,
       ttsLibrary: TTSLibrary,
       sonosLibrary: SonosLibrary
-   ) =
-      SandboxFactory(utilLibrary, serverLibrary, httpLibrary, ttsLibrary, sonosLibrary)
+   ) = SandboxFactory(
+      configLoader,
+      utilLibrary,
+      serverLibrary,
+      httpLibrary,
+      ttsLibrary,
+      sonosLibrary
+   )
 
    @Provides
    @Singleton