Invitations: implement invitations handling.

app/src/main/AndroidManifest.xml

@@ -237,6 +237,10 @@
             android:name=".ui.etebase.CollectionActivity"
             android:exported="false"
             />
+        <activity
+            android:name=".ui.etebase.InvitationsActivity"
+            android:exported="false"
+            />
         <activity
             android:name=".ui.ViewCollectionActivity"
             android:exported="false"

app/src/main/java/com/etesync/syncadapter/ui/AccountActivity.kt

@@ -45,6 +45,7 @@ import com.etesync.syncadapter.resource.LocalAddressBook
 import com.etesync.syncadapter.resource.LocalCalendar
 import com.etesync.syncadapter.syncadapter.requestSync
 import com.etesync.syncadapter.ui.etebase.CollectionActivity
+import com.etesync.syncadapter.ui.etebase.InvitationsActivity
 import com.etesync.syncadapter.ui.setup.SetupUserInfoFragment
 import com.etesync.syncadapter.utils.HintManager
 import com.etesync.syncadapter.utils.ShowcaseBuilder
@@ -156,6 +157,10 @@ class AccountActivity : BaseActivity(), Toolbar.OnMenuItemClickListener, PopupMe
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         menuInflater.inflate(R.menu.activity_account, menu)
+        if (settings.isLegacy) {
+            val invitations = menu.findItem(R.id.invitations)
+            invitations.setVisible(false)
+        }
         return true
     }
 
@@ -185,6 +190,10 @@ class AccountActivity : BaseActivity(), Toolbar.OnMenuItemClickListener, PopupMe
                         .setPositiveButton(android.R.string.yes) { _, _ -> }.create()
                 dialog.show()
             }
+            R.id.invitations -> {
+                val intent = InvitationsActivity.newIntent(this, account)
+                startActivity(intent)
+            }
             else -> return super.onOptionsItemSelected(item)
         }
         return true

app/src/main/java/com/etesync/syncadapter/ui/etebase/InvitationsActivity.kt

@@ -0,0 +1,43 @@
+package com.etesync.syncadapter.ui.etebase
+
+import android.accounts.Account
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.viewModels
+import androidx.fragment.app.commit
+import com.etesync.syncadapter.R
+import com.etesync.syncadapter.ui.BaseActivity
+
+class InvitationsActivity : BaseActivity() {
+    private lateinit var account: Account
+    private val model: AccountViewModel by viewModels()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        account = intent.extras!!.getParcelable(EXTRA_ACCOUNT)!!
+
+        setContentView(R.layout.etebase_collection_activity)
+
+        if (savedInstanceState == null) {
+            model.loadAccount(this, account)
+            title = getString(R.string.invitations_title)
+            supportFragmentManager.commit {
+                replace(R.id.fragment_container, InvitationsListFragment())
+            }
+        }
+
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+    }
+
+    companion object {
+        private val EXTRA_ACCOUNT = "account"
+
+        fun newIntent(context: Context, account: Account): Intent {
+            val intent = Intent(context, InvitationsActivity::class.java)
+            intent.putExtra(EXTRA_ACCOUNT, account)
+            return intent
+        }
+    }
+}

app/src/main/java/com/etesync/syncadapter/ui/etebase/InvitationsListFragment.kt

@@ -0,0 +1,172 @@
+package com.etesync.syncadapter.ui.etebase
+
+import android.content.Context
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.*
+import androidx.appcompat.app.AlertDialog
+import androidx.fragment.app.ListFragment
+import androidx.fragment.app.activityViewModels
+import androidx.fragment.app.viewModels
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.observe
+import com.etebase.client.CollectionAccessLevel
+import com.etebase.client.FetchOptions
+import com.etebase.client.SignedInvitation
+import com.etebase.client.Utils
+import com.etesync.syncadapter.R
+import org.jetbrains.anko.doAsync
+import org.jetbrains.anko.uiThread
+import java.util.*
+import java.util.concurrent.Future
+
+
+class InvitationsListFragment : ListFragment(), AdapterView.OnItemClickListener {
+    private val model: AccountViewModel by activityViewModels()
+    private val invitationsModel: InvitationsViewModel by viewModels()
+
+    private var emptyTextView: TextView? = null
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        val view = inflater.inflate(R.layout.invitations_list, container, false)
+
+        //This is instead of setEmptyText() function because of Google bug
+        //See: https://code.google.com/p/android/issues/detail?id=21742
+        emptyTextView = view.findViewById<TextView>(android.R.id.empty)
+        return view
+    }
+
+    private fun setListAdapterInvitations(invitations: List<SignedInvitation>) {
+        val context = context
+        if (context != null) {
+            val listAdapter = InvitationsListAdapter(context)
+            setListAdapter(listAdapter)
+
+            listAdapter.addAll(invitations)
+
+            emptyTextView!!.setText(R.string.invitations_list_empty)
+        }
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        model.observe(this) {
+            invitationsModel.loadInvitations(it)
+        }
+
+        invitationsModel.observe(this) {
+            setListAdapterInvitations(it)
+        }
+
+        listView.onItemClickListener = this
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+
+        invitationsModel.cancelLoad()
+    }
+
+    override fun onItemClick(parent: AdapterView<*>, view_: View, position: Int, id: Long) {
+        val invitation = listAdapter?.getItem(position) as SignedInvitation
+        val fingerprint = Utils.prettyFingerprint(invitation.fromPubkey)
+        val view = layoutInflater.inflate(R.layout.invitation_alert_dialog, null)
+        view.findViewById<TextView>(R.id.body).text = getString(R.string.invitations_accept_reject_dialog)
+        view.findViewById<TextView>(R.id.fingerprint).text = fingerprint
+
+        AlertDialog.Builder(requireContext())
+                .setTitle(R.string.invitations_title)
+                .setIcon(R.drawable.ic_email_black)
+                .setView(view)
+                .setNegativeButton(R.string.invitations_reject) { dialogInterface, i ->
+                    invitationsModel.reject(model.value!!, invitation)
+                }
+                .setPositiveButton(R.string.invitations_accept) { dialogInterface, i ->
+                    invitationsModel.accept(model.value!!, invitation)
+                }
+                .show()
+        return
+    }
+
+    internal inner class InvitationsListAdapter(context: Context) : ArrayAdapter<SignedInvitation>(context, R.layout.invitations_list_item) {
+
+        override fun getView(position: Int, _v: View?, parent: ViewGroup): View {
+            var v = _v
+            if (v == null)
+                v = LayoutInflater.from(context).inflate(R.layout.invitations_list_item, parent, false)
+
+            val invitation = getItem(position)!!
+
+            val tv = v!!.findViewById<View>(R.id.title) as TextView
+            // FIXME: Should have a sensible string here
+            tv.text = "Invitation ${position}"
+
+            // FIXME: Also mark admins
+            val readOnly = v.findViewById<View>(R.id.read_only)
+            readOnly.visibility = if (invitation.accessLevel == CollectionAccessLevel.ReadOnly) View.VISIBLE else View.GONE
+
+            return v
+        }
+    }
+}
+
+class InvitationsViewModel : ViewModel() {
+    private val invitations = MutableLiveData<List<SignedInvitation>>()
+    private var asyncTask: Future<Unit>? = null
+
+    fun loadInvitations(accountCollectionHolder: AccountHolder) {
+        asyncTask = doAsync {
+            val ret = LinkedList<SignedInvitation>()
+            val invitationManager = accountCollectionHolder.etebase.invitationManager
+            var iterator: String? = null
+            var done = false
+            while (!done) {
+                val chunk = invitationManager.listIncoming(FetchOptions().iterator(iterator).limit(30))
+                iterator = chunk.stoken
+                done = chunk.isDone
+
+                ret.addAll(chunk.data)
+            }
+
+            uiThread {
+                invitations.value = ret
+            }
+        }
+    }
+
+    fun accept(accountCollectionHolder: AccountHolder, invitation: SignedInvitation) {
+        doAsync {
+            val invitationManager = accountCollectionHolder.etebase.invitationManager
+            invitationManager.accept(invitation)
+            val ret = invitations.value!!.filter { it != invitation }
+
+            uiThread {
+                invitations.value = ret
+            }
+        }
+    }
+
+    fun reject(accountCollectionHolder: AccountHolder, invitation: SignedInvitation) {
+        doAsync {
+            val invitationManager = accountCollectionHolder.etebase.invitationManager
+            invitationManager.reject(invitation)
+            val ret = invitations.value!!.filter { it != invitation }
+
+            uiThread {
+                invitations.value = ret
+            }
+        }
+    }
+
+    fun cancelLoad() {
+        asyncTask?.cancel(true)
+    }
+
+    fun observe(owner: LifecycleOwner, observer: (List<SignedInvitation>) -> Unit) =
+            invitations.observe(owner, observer)
+}

app/src/main/res/layout/invitation_alert_dialog.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:gravity="center_horizontal"
+    android:orientation="vertical"
+    android:padding="18dp">
+
+    <TextView
+        android:id="@+id/body"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="12dp"
+        android:text="@string/invitations_accept_reject_dialog"
+        android:textAppearance="?android:attr/textAppearanceMedium" />
+
+    <TextView
+        android:id="@+id/fingerprint"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:fontFamily="monospace"
+        android:gravity="center"
+        android:textAlignment="center"
+        android:textAppearance="?android:attr/textAppearanceSmall"
+        tools:text="aaaa 1111 bbbb cccc dddd eeee\n1111" />
+
+</LinearLayout>

app/src/main/res/layout/invitations_list.xml

@@ -0,0 +1,20 @@
+<?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="match_parent"
+    android:orientation="vertical">
+
+    <ListView
+        android:id="@id/android:list"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+    <TextView
+        android:id="@id/android:empty"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_margin="16dp"
+        android:gravity="center"
+        android:text="@string/invitations_loading"
+        android:textAppearance="@style/TextAppearance.AppCompat.Large" />
+</LinearLayout>

app/src/main/res/layout/invitations_list_item.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:gravity="center_vertical"
+    android:orientation="horizontal"
+    android:padding="8dp">
+
+    <TextView
+        android:id="@+id/title"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:textAppearance="?android:attr/textAppearanceMedium"
+        tools:text="Title" />
+
+    <ImageView
+        android:id="@+id/read_only"
+        android:layout_width="32dp"
+        android:layout_height="32dp"
+        android:layout_marginRight="8dp"
+        android:src="@drawable/ic_readonly_dark"
+        android:visibility="gone" />
+
+</LinearLayout>

app/src/main/res/menu/activity_account.xml

@@ -25,6 +25,10 @@
         android:title="@string/account_show_fingerprint"
         app:showAsAction="ifRoom"/>
 
+    <item android:id="@+id/invitations"
+        android:title="@string/invitations_title"
+        app:showAsAction="never"/>
+
     <item android:id="@+id/delete_account"
           android:title="@string/account_delete"
           app:showAsAction="never"/>

app/src/main/res/values/strings.xml

@@ -168,6 +168,14 @@
     <string name="collection_members_remove">Would you like to revoke %s\'s access?\nPlease be advised that a malicious user would potentially be able to retain access to encryption keys. Please refer to the FAQ for more information.</string>
     <string name="collection_members_remove_admin">Removing access to admins is currently not supported.</string>
 
+    <!-- Invitations -->
+    <string name="invitations_title">Invitations</string>
+    <string name="invitations_loading">Loading invitations...</string>
+    <string name="invitations_list_empty">No invitations</string>
+    <string name="invitations_accept_reject_dialog">Would you like to accept or reject the invitation?</string>
+    <string name="invitations_accept">Accept</string>
+    <string name="invitations_reject">Reject</string>
+
     <!-- JournalItemActivity -->
     <string name="about">About</string>
     <string name="journal_item_tab_main">Main</string>