Embed UUID and SERVER_URL in build types

UUID and SERVER_URL is now part of the build process.
For debug, the placeholder default values are set, however if corresponding env values are set, it sets them.
So by default the settings now displays the environment URL and UUID fetched during build.
For Release, the env values are pulled again from env variable. Which is injected in github action.

puppet/app/build.gradle

@@ -5,7 +5,7 @@ plugins {
 
 android {
     namespace 'com.ttt246.puppet'
-    compileSdkVersion 33
+    compileSdk 33
     kotlinOptions {
         jvmTarget = "1.8"
     }
@@ -28,10 +28,27 @@ android {
         }
     }
 
+    buildFeatures {
+        buildConfig = true
+    }
+
     buildTypes {
+        def DEFAULT_SERVER_URL = '"https://posix4e-puppet.hf.space"'
+        // This is a non existent UUID, meant to be a placeholder so that build wont yell
+        def DEFAULT_UUID = '"123456789012345"'
+
+        debug {
+            buildConfigField("String", "SERVER_URL", System.getenv("SERVER_URL") ?: DEFAULT_SERVER_URL)
+            buildConfigField("String", "UUID", System.getenv("UUID") ?: DEFAULT_UUID)
+            applicationIdSuffix ".debug"
+        }
+
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+
+            buildConfigField("String", "SERVER_URL", System.getenv("SERVER_URL") ?: '""')
+            buildConfigField("String", "UUID", System.getenv("UUID") ?: '""')
         }
     }
 

puppet/app/src/main/java/com/ttt246/puppet/ChatterAct.kt

@@ -3,6 +3,8 @@ package com.ttt246.puppet
 import android.annotation.SuppressLint
 import android.content.Context
 import android.content.Intent
+import android.content.SharedPreferences
+import android.os.Build
 import android.os.Bundle
 import android.preference.PreferenceManager
 import android.provider.Settings
@@ -12,6 +14,8 @@ import androidx.appcompat.app.AppCompatActivity
 
 class ChatterAct : AppCompatActivity() {
     private lateinit var webView: WebView
+    private lateinit var sharedPreferences: SharedPreferences
+
     private val TAG = "ChatterActLog"
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -19,6 +23,12 @@ class ChatterAct : AppCompatActivity() {
         setContentView(R.layout.activity_main)
         supportActionBar?.hide()
 
+        sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this)
+        val editor = sharedPreferences.edit()
+        editor.putString("SERVER_URL", BuildConfig.SERVER_URL)
+        editor.putString("UUID", BuildConfig.UUID)
+        editor.apply()
+
         val accessibilitySettingsBtn: Button = findViewById(R.id.accessibilitySettings)
         accessibilitySettingsBtn.setOnClickListener {
             val intent = Intent(Settings.ACTION_ACCESSIBILITY_SETTINGS)