implement backend settings

1 files changed, 109 insertions, 2 deletions

diff --git a/app/src/main/java/net/taler/merchantpos/MerchantSettings.kt b/app/src/main/java/net/taler/merchantpos/MerchantSettings.kt
index 1903bce..7797dcb 100644
--- a/app/src/main/java/net/taler/merchantpos/MerchantSettings.kt
+++ b/app/src/main/java/net/taler/merchantpos/MerchantSettings.kt
@@ -1,21 +1,128 @@
 package net.taler.merchantpos
 
+import android.content.Context
 import android.os.Bundle
 import androidx.fragment.app.Fragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.Button
+import android.widget.EditText
+import android.widget.TextView
+import androidx.lifecycle.ViewModelProviders
+import com.android.volley.Request
+import com.android.volley.RequestQueue
+import com.android.volley.Response
+import com.android.volley.VolleyError
+import com.android.volley.toolbox.Volley
+import com.google.android.material.snackbar.Snackbar
+import org.json.JSONObject
 
 
 /**
  * Fragment that displays merchant settings.
  */
 class MerchantSettings : Fragment() {
+
+    private lateinit var queue: RequestQueue
+    private lateinit var model: PosTerminalViewModel
+
+    private var newConfig: MerchantConfig? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        model = activity?.run {
+            ViewModelProviders.of(this)[PosTerminalViewModel::class.java]
+        } ?: throw Exception("Invalid Activity")
+
+        queue = Volley.newRequestQueue(context)
+    }
+
+    private fun reset(view: View) {
+        val backendUrlEdit = view.findViewById<EditText>(R.id.edit_settings_backend_url)
+        backendUrlEdit.setText(model.merchantConfig!!.baseUrl, TextView.BufferType.EDITABLE)
+
+        val backendInstanceEdit = view.findViewById<EditText>(R.id.edit_settings_instance)
+        backendInstanceEdit.setText(model.merchantConfig!!.instance, TextView.BufferType.EDITABLE)
+
+        val backendApiKeyEdit = view.findViewById<EditText>(R.id.edit_settings_apikey)
+        backendApiKeyEdit.setText(model.merchantConfig!!.apiKey, TextView.BufferType.EDITABLE)
+
+        val currencyView = view.findViewById<TextView>(R.id.text_settings_currency)
+        currencyView.text = model.merchantConfig!!.currency
+    }
+
+
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View? {
-        // Inflate the layout for this fragment
-        return inflater.inflate(R.layout.fragment_merchant_settings, container, false)
+        val view = inflater.inflate(R.layout.fragment_merchant_settings, container, false)
+
+        reset(view)
+
+        val buttonApply = view.findViewById<Button>(R.id.button_settings_apply)
+        buttonApply.setOnClickListener {
+
+            val backendUrlEdit = view.findViewById<EditText>(R.id.edit_settings_backend_url)
+            val backendInstanceEdit = view.findViewById<EditText>(R.id.edit_settings_instance)
+            val backendApiKeyEdit = view.findViewById<EditText>(R.id.edit_settings_apikey)
+
+            val config = MerchantConfig(
+                backendUrlEdit.text.toString(),
+                backendInstanceEdit.text.toString(),
+                backendApiKeyEdit.text.toString(),
+                "UNKNOWN"
+            )
+
+            newConfig = config
+
+            val req = MerchantInternalRequest(
+                Request.Method.GET,
+                config,
+                "config",
+                mapOf("instance" to config.instance),
+                null,
+                Response.Listener { onConfigReceived(it) },
+                Response.ErrorListener { onNetworkError(it) })
+
+            queue.add(req)
+
+        }
+
+        val buttonReset = view.findViewById<Button>(R.id.button_settings_reset)
+        buttonReset.setOnClickListener {
+            reset(view)
+        }
+
+        return view
+    }
+
+    private fun onConfigReceived(it: JSONObject) {
+        val currency = it.getString("currency")
+        val mySnackbar =
+            Snackbar.make(view!!, "Changed to new ${currency} merchant", Snackbar.LENGTH_SHORT)
+
+        val config = this.newConfig!!.copy(currency = currency)
+        this.newConfig = null
+        model.merchantConfig = config
+
+        val currencyView = view!!.findViewById<TextView>(R.id.text_settings_currency)
+        currencyView.text = currency
+
+        mySnackbar.show()
+
+        val prefs = activity!!.getSharedPreferences("taler-merchant-terminal", Context.MODE_PRIVATE)
+        prefs.edit().putString("merchantBackendUrl", config.baseUrl)
+            .putString("merchantBackendInstance", config.instance)
+            .putString("merchantBackendApiKey", config.apiKey)
+            .putString("merchantBackendCurrency", config.currency)
+    }
+
+    private fun onNetworkError(it: VolleyError) {
+        val mySnackbar =
+            Snackbar.make(view!!, "Error: Invalid Configuration", Snackbar.LENGTH_SHORT)
+        mySnackbar.show()
     }
 }