Initial commit

app/src/main/java/eu/neilalexander/yggdrasil/ConfigurationProxy.kt

@@ -0,0 +1,47 @@
+package eu.neilalexander.yggdrasil
+
+import android.content.Context
+import mobile.Mobile
+import org.json.JSONObject
+import java.io.File
+
+object ConfigurationProxy {
+    private lateinit var json: JSONObject
+    private lateinit var file: File
+
+    operator fun invoke(applicationContext: Context): ConfigurationProxy {
+        file = File(applicationContext.filesDir, "yggdrasil.conf")
+        if (!file.exists()) {
+            val conf = Mobile.generateConfigJSON()
+            if (file.createNewFile()) {
+                file.writeBytes(conf)
+            }
+        }
+        fix()
+        return this
+    }
+
+    fun updateJSON(fn: (JSONObject) -> Unit) {
+        json = JSONObject(file.readText(Charsets.UTF_8))
+        fn(json)
+        val str = json.toString()
+        file.writeText(str, Charsets.UTF_8)
+    }
+
+    private fun fix() {
+        updateJSON { json ->
+            json.put("AdminListen", "none")
+            json.put("IfName", "none")
+            json.put("IfMTU", 65535)
+        }
+    }
+
+    fun getJSON(): JSONObject {
+        fix()
+        return json
+    }
+
+    fun getJSONByteArray(): ByteArray {
+        return json.toString().toByteArray(Charsets.UTF_8)
+    }
+}