Partially fix device linking

res/layout/activity_linked_devices.xml

@@ -11,6 +11,7 @@
         android:layout_height="match_parent" />
 
     <LinearLayout
+        android:id="@+id/emptyStateContainer"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:gravity="center_horizontal"

res/layout/view_device.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="@drawable/conversation_view_background"
+    android:padding="@dimen/medium_spacing"
+    android:orientation="vertical">
+
+    <TextView
+        android:id="@+id/titleTextView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:maxLines="1"
+        android:ellipsize="end"
+        android:textSize="@dimen/medium_font_size"
+        android:textStyle="bold"
+        android:textColor="@color/text"
+        android:text="Spiderman" />
+
+    <TextView
+        android:id="@+id/subtitleTextView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:maxLines="1"
+        android:ellipsize="end"
+        android:textSize="@dimen/small_font_size"
+        android:textColor="@color/text"
+        android:text="Sorry, gotta go fight crime again" />
+
+</LinearLayout>

src/org/thoughtcrime/securesms/loki/redesign/activities/LinkedDevicesActivity.kt

@@ -2,37 +2,67 @@ package org.thoughtcrime.securesms.loki.redesign.activities
 
 import android.os.AsyncTask
 import android.os.Bundle
+import android.support.v4.app.LoaderManager
+import android.support.v4.content.Loader
+import android.support.v7.app.AlertDialog
 import android.support.v7.widget.LinearLayoutManager
 import android.view.Menu
 import android.view.MenuItem
+import android.view.View
 import kotlinx.android.synthetic.main.activity_linked_devices.*
 import network.loki.messenger.R
 import org.thoughtcrime.securesms.PassphraseRequiredActionBarActivity
+import org.thoughtcrime.securesms.devicelist.Device
 import org.thoughtcrime.securesms.loki.redesign.dialogs.LinkDeviceMasterModeDialog
 import org.thoughtcrime.securesms.loki.redesign.dialogs.LinkDeviceMasterModeDialogDelegate
 import org.thoughtcrime.securesms.loki.signAndSendPairingAuthorisationMessage
 import org.thoughtcrime.securesms.util.Util
 import org.whispersystems.signalservice.loki.api.PairingAuthorisation
 
-class LinkedDevicesActivity : PassphraseRequiredActionBarActivity, LinkDeviceMasterModeDialogDelegate {
+class LinkedDevicesActivity : PassphraseRequiredActionBarActivity, LoaderManager.LoaderCallbacks<List<Device>>, LinkDeviceMasterModeDialogDelegate {
+    private val linkedDevicesAdapter = LinkedDevicesAdapter(this)
+    private var devices = listOf<Device>()
+        set(value) { field = value; linkedDevicesAdapter.devices = value }
 
+    // region Lifecycle
     constructor() : super()
 
     override fun onCreate(savedInstanceState: Bundle?, isReady: Boolean) {
         super.onCreate(savedInstanceState, isReady)
         setContentView(R.layout.activity_linked_devices)
         supportActionBar!!.title = "Linked Devices"
-//        val homeAdapter = LinkedDevicesAdapter(this, cursor)
-//        recyclerView.adapter = homeAdapter
+        recyclerView.adapter = linkedDevicesAdapter
         recyclerView.layoutManager = LinearLayoutManager(this)
         linkDeviceButton.setOnClickListener { linkDevice() }
+        LoaderManager.getInstance(this).initLoader(0, null, this)
     }
 
     override fun onCreateOptionsMenu(menu: Menu?): Boolean {
         menuInflater.inflate(R.menu.menu_linked_devices, menu)
         return true
     }
+    // endregion
 
+    // region Updating
+    override fun onCreateLoader(id: Int, bundle: Bundle?): Loader<List<Device>> {
+        return LinkedDevicesLoader(this)
+    }
+
+    override fun onLoadFinished(loader: Loader<List<Device>>, devices: List<Device>?) {
+        update(devices ?: listOf())
+    }
+
+    override fun onLoaderReset(loader: Loader<List<Device>>) {
+        update(listOf())
+    }
+
+    private fun update(devices: List<Device>) {
+        this.devices = devices
+        emptyStateContainer.visibility = if (devices.isEmpty()) View.VISIBLE else View.GONE
+    }
+    // endregion
+
+    // region Interaction
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         val id = item.itemId
         when (id) {
@@ -43,9 +73,17 @@ class LinkedDevicesActivity : PassphraseRequiredActionBarActivity, LinkDeviceMas
     }
 
     private fun linkDevice() {
-        val linkDeviceDialog = LinkDeviceMasterModeDialog()
-        linkDeviceDialog.delegate = this
-        linkDeviceDialog.show(supportFragmentManager, "Link Device Dialog")
+        if (devices.isEmpty()) {
+            val linkDeviceDialog = LinkDeviceMasterModeDialog()
+            linkDeviceDialog.delegate = this
+            linkDeviceDialog.show(supportFragmentManager, "Link Device Dialog")
+        } else {
+            val builder = AlertDialog.Builder(this)
+            builder.setTitle("Multi Device Limit Reached")
+            builder.setMessage("It's currently not allowed to link more than one device.")
+            builder.setPositiveButton("OK", { dialog, _ -> dialog.dismiss() })
+            builder.create().show()
+        }
     }
 
     override fun onDeviceLinkRequestAuthorized(authorization: PairingAuthorisation) {
@@ -60,4 +98,5 @@ class LinkedDevicesActivity : PassphraseRequiredActionBarActivity, LinkDeviceMas
     override fun onDeviceLinkCanceled() {
         // Do nothing
     }
+    // endregion
 }

src/org/thoughtcrime/securesms/loki/redesign/activities/LinkedDevicesAdapter.kt

@@ -0,0 +1,28 @@
+package org.thoughtcrime.securesms.loki.redesign.activities
+
+import android.content.Context
+import android.support.v7.widget.RecyclerView
+import android.view.ViewGroup
+import org.thoughtcrime.securesms.devicelist.Device
+import org.thoughtcrime.securesms.loki.redesign.views.DeviceView
+
+class LinkedDevicesAdapter(private val context: Context) : RecyclerView.Adapter<LinkedDevicesAdapter.ViewHolder>() {
+    var devices = listOf<Device>()
+        set(value) { field = value; notifyDataSetChanged() }
+
+    class ViewHolder(val view: DeviceView) : RecyclerView.ViewHolder(view)
+
+    override fun getItemCount(): Int {
+        return devices.size
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+        val view = DeviceView(context)
+        return ViewHolder(view)
+    }
+
+    override fun onBindViewHolder(viewHolder: ViewHolder, position: Int) {
+        val device = devices[position]
+        viewHolder.view.bind(device)
+    }
+}

src/org/thoughtcrime/securesms/loki/redesign/activities/LinkedDevicesLoader.kt

@@ -0,0 +1,33 @@
+package org.thoughtcrime.securesms.loki.redesign.activities
+
+import android.content.Context
+import org.thoughtcrime.securesms.database.DatabaseFactory
+import org.thoughtcrime.securesms.devicelist.Device
+import org.thoughtcrime.securesms.loki.MnemonicUtilities
+import org.thoughtcrime.securesms.util.AsyncLoader
+import org.thoughtcrime.securesms.util.TextSecurePreferences
+import org.whispersystems.signalservice.loki.api.LokiStorageAPI
+import org.whispersystems.signalservice.loki.crypto.MnemonicCodec
+import java.io.File
+
+class LinkedDevicesLoader(context: Context) : AsyncLoader<List<Device>>(context) {
+
+    private val mnemonicCodec by lazy {
+        val languageFileDirectory = File(context.applicationInfo.dataDir)
+        MnemonicCodec(languageFileDirectory)
+    }
+
+    override fun loadInBackground(): List<Device>? {
+        try {
+            val userHexEncodedPublicKey = TextSecurePreferences.getLocalNumber(context)
+            val slaveDeviceHexEncodedPublicKeys = LokiStorageAPI.shared.getSecondaryDevicePublicKeys(userHexEncodedPublicKey).get()
+            return slaveDeviceHexEncodedPublicKeys.map { hexEncodedPublicKey ->
+                val shortID = MnemonicUtilities.getFirst3Words(mnemonicCodec, hexEncodedPublicKey)
+                val name = DatabaseFactory.getLokiUserDatabase(context).getDisplayName(hexEncodedPublicKey)
+                Device(hexEncodedPublicKey, shortID, name)
+            }.sortedBy { it.name }
+        } catch (e: Exception) {
+            return null
+        }
+    }
+}

src/org/thoughtcrime/securesms/loki/redesign/views/DeviceView.kt

@@ -0,0 +1,44 @@
+package org.thoughtcrime.securesms.loki.redesign.views
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.LayoutInflater
+import android.widget.LinearLayout
+import kotlinx.android.synthetic.main.view_device.view.*
+import network.loki.messenger.R
+import org.thoughtcrime.securesms.devicelist.Device
+
+class DeviceView : LinearLayout {
+    var device: Device? = null
+
+    // region Lifecycle
+    constructor(context: Context) : super(context) {
+        setUpViewHierarchy()
+    }
+
+    constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {
+        setUpViewHierarchy()
+    }
+
+    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int) : super(context, attrs, defStyleAttr) {
+        setUpViewHierarchy()
+    }
+
+    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int, defStyleRes: Int) : super(context, attrs, defStyleAttr, defStyleRes) {
+        setUpViewHierarchy()
+    }
+
+    private fun setUpViewHierarchy() {
+        val inflater = context.applicationContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
+        val contentView = inflater.inflate(R.layout.view_device, null)
+        addView(contentView)
+    }
+    // endregion
+
+    // region Updating
+    fun bind(device: Device) {
+        titleTextView.text = if (!device.name.isNullOrBlank()) device.name else "Unnamed Device"
+        subtitleTextView.text = device.shortId
+    }
+    // endregion
+}