List missing features on connect. Fixes #53

app/sampledata/features.json

+[
+  {
+    "name": "SynchronizedMarkerLine",
+    "description": "Required for synchronizing the last position in channels"
+  },
+  {
+    "name": "SaslAuthentication",
+    "description": "Required for SASL"
+  },
+  {
+    "name": "SaslExternal",
+    "description": "Required for SASL with certificates"
+  },
+  {
+    "name": "HideInactiveNetworks",
+    "description": "Required for hiding inactive networks from chat lists"
+  },
+  {
+    "name": "PasswordChange",
+    "description": "Required for changing passwords from the client"
+  },
+  {
+    "name": "CapNegotiation",
+    "description": "Required for IRCv3 capabilities"
+  },
+  {
+    "name": "VerifyServerSSL",
+    "description": "Required for verifying the SSL certificate of IRC networks you connect to"
+  },
+  {
+    "name": "CustomRateLimits",
+    "description": "Required for custom rate limits for IRC networks"
+  },
+  {
+    "name": "AwayFormatTimestamp",
+    "description": "Required for custom formatted timestamps in away messages"
+  },
+  {
+    "name": "BufferActivitySync",
+    "description": "Required for seeing activity of chats in the chat list"
+  },
+  {
+    "name": "CoreSideHighlights",
+    "description": "Required for highlights"
+  },
+  {
+    "name": "SenderPrefixes",
+    "description": "Required for seeing prefix modes (+, @) of users in channels"
+  },
+  {
+    "name": "RemoteDisconnect",
+    "description": "Required for remote disconnects of your own clients"
+  },
+  {
+    "name": "RichMessages",
+    "description": "Required for seeing real names or IRCv3 or Gravatar avatars in messages"
+  },
+  {
+    "name": "BacklogFilterType",
+    "description": "Required for receiving past notifications after connecting"
+  }
+]

app/src/main/java/de/kuschku/quasseldroid/ui/chat/ChatActivity.kt

@@ -47,6 +47,7 @@ import de.kuschku.libquassel.protocol.Buffer_Type
 import de.kuschku.libquassel.protocol.Message
 import de.kuschku.libquassel.protocol.Message_Type
 import de.kuschku.libquassel.protocol.message.HandshakeMessage
+import de.kuschku.libquassel.quassel.ExtendedFeature
 import de.kuschku.libquassel.session.Error
 import de.kuschku.libquassel.util.Optional
 import de.kuschku.libquassel.util.flag.and
@@ -68,6 +69,8 @@ import de.kuschku.quasseldroid.ui.setup.accounts.selection.AccountSelectionActiv
 import de.kuschku.quasseldroid.ui.setup.user.UserSetupActivity
 import de.kuschku.quasseldroid.util.helper.*
 import de.kuschku.quasseldroid.util.irc.format.IrcFormatDeserializer
+import de.kuschku.quasseldroid.util.missingfeatures.MissingFeature
+import de.kuschku.quasseldroid.util.missingfeatures.MissingFeaturesDialog
 import de.kuschku.quasseldroid.util.service.ServiceBoundActivity
 import de.kuschku.quasseldroid.util.ui.DragInterceptBottomSheetBehavior
 import de.kuschku.quasseldroid.util.ui.MaterialContentLoadingProgressBar
@@ -464,6 +467,52 @@ class ChatActivity : ServiceBoundActivity(), SharedPreferences.OnSharedPreferenc
             if (it.identities.isEmpty()) {
               UserSetupActivity.launch(this)
             }
+            val missingFeatures = listOf(
+              ExtendedFeature.SynchronizedMarkerLine,
+              ExtendedFeature.SaslAuthentication,
+              ExtendedFeature.SaslExternal,
+              ExtendedFeature.HideInactiveNetworks,
+              ExtendedFeature.PasswordChange,
+              ExtendedFeature.CapNegotiation,
+              ExtendedFeature.VerifyServerSSL,
+              ExtendedFeature.CustomRateLimits,
+              ExtendedFeature.AwayFormatTimestamp,
+              ExtendedFeature.BufferActivitySync,
+              ExtendedFeature.CoreSideHighlights,
+              ExtendedFeature.SenderPrefixes,
+              ExtendedFeature.RemoteDisconnect,
+              ExtendedFeature.RichMessages,
+              ExtendedFeature.BacklogFilterType
+            ) - it.features.core.enabledFeatures
+            if (missingFeatures.isNotEmpty()) {
+              MissingFeaturesDialog.Builder(this)
+                .missingFeatures(missingFeatures.mapNotNull { feature ->
+                  when (feature) {
+                    ExtendedFeature.SynchronizedMarkerLine -> R.string.label_feature_synchronizedmarkerline
+                    ExtendedFeature.SaslAuthentication     -> R.string.label_feature_saslauthentication
+                    ExtendedFeature.SaslExternal           -> R.string.label_feature_saslexternal
+                    ExtendedFeature.HideInactiveNetworks   -> R.string.label_feature_hideinactivenetworks
+                    ExtendedFeature.PasswordChange         -> R.string.label_feature_passwordchange
+                    ExtendedFeature.CapNegotiation         -> R.string.label_feature_capnegotiation
+                    ExtendedFeature.VerifyServerSSL        -> R.string.label_feature_verifyserverssl
+                    ExtendedFeature.CustomRateLimits       -> R.string.label_feature_customratelimits
+                    ExtendedFeature.AwayFormatTimestamp    -> R.string.label_feature_awayformattimestamp
+                    ExtendedFeature.BufferActivitySync     -> R.string.label_feature_bufferactivitysync
+                    ExtendedFeature.CoreSideHighlights     -> R.string.label_feature_coresidehighlights
+                    ExtendedFeature.SenderPrefixes         -> R.string.label_feature_senderprefixes
+                    ExtendedFeature.RemoteDisconnect       -> R.string.label_feature_remotedisconnect
+                    ExtendedFeature.RichMessages           -> R.string.label_feature_richmessages
+                    ExtendedFeature.BacklogFilterType      -> R.string.label_feature_backlogfiltertype
+                    else                                   -> null
+                  }?.let {
+                    MissingFeature(
+                      feature = feature,
+                      description = it
+                    )
+                  }
+                })
+                .show()
+            }
           }
         }
       })

app/src/main/java/de/kuschku/quasseldroid/util/ui/ColorChooserDialog.java

@@ -94,16 +94,6 @@ public class ColorChooserDialog extends DialogFragment
   public ColorChooserDialog() {
   }
 
-  @Nullable
-  public static ColorChooserDialog findVisible(
-    @NonNull FragmentManager fragmentManager, @ColorChooserTag String tag) {
-    Fragment frag = fragmentManager.findFragmentByTag(tag);
-    if (frag != null && frag instanceof ColorChooserDialog) {
-      return (ColorChooserDialog) frag;
-    }
-    return null;
-  }
-
   private void generateColors() {
     Builder builder = getBuilder();
     colorsTop = builder.colorsTop;

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

+<?xml version="1.0" encoding="utf-8"?><!--
+  Quasseldroid - Quassel client for Android
+
+  Copyright (c) 2018 Janne Koschinski
+  Copyright (c) 2018 The Quassel Project
+
+  This program is free software: you can redistribute it and/or modify it
+  under the terms of the GNU General Public License version 3 as published
+  by the Free Software Foundation.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License along
+  with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<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="match_parent"
+  android:orientation="vertical"
+  android:paddingBottom="8dp"
+  android:paddingTop="8dp">
+
+  <TextView
+    style="@style/Widget.RtlConformTextView"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:paddingBottom="8dp"
+    android:paddingEnd="?listPreferredItemPaddingRight"
+    android:paddingLeft="?listPreferredItemPaddingLeft"
+    android:paddingRight="?listPreferredItemPaddingRight"
+    android:paddingStart="?listPreferredItemPaddingLeft"
+    android:paddingTop="8dp"
+    android:text="@string/info_missing_features"
+    android:textColor="?colorTextPrimary"
+    android:textSize="16sp" />
+
+  <android.support.v7.widget.RecyclerView
+    android:id="@+id/list"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:nestedScrollingEnabled="false"
+    tools:ignore="UnusedAttribute"
+    tools:itemCount="3"
+    tools:listitem="@layout/widget_missing_feature" />
+</LinearLayout>

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

+<?xml version="1.0" encoding="utf-8"?><!--
+  Quasseldroid - Quassel client for Android
+
+  Copyright (c) 2018 Janne Koschinski
+  Copyright (c) 2018 The Quassel Project
+
+  This program is free software: you can redistribute it and/or modify it
+  under the terms of the GNU General Public License version 3 as published
+  by the Free Software Foundation.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License along
+  with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<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:background="?android:attr/selectableItemBackground"
+  android:focusable="true"
+  android:gravity="center_vertical"
+  android:minHeight="?android:attr/listPreferredItemHeightSmall"
+  android:paddingEnd="?android:attr/listPreferredItemPaddingRight"
+  android:paddingLeft="?android:attr/listPreferredItemPaddingLeft"
+  android:paddingRight="?android:attr/listPreferredItemPaddingRight"
+  android:paddingStart="?android:attr/listPreferredItemPaddingLeft"
+  tools:showIn="@layout/dialog_missing_features">
+
+  <LinearLayout
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:paddingBottom="16dp"
+    android:paddingTop="16dp">
+
+    <TextView
+      android:id="@+id/name"
+      style="@style/Widget.RtlConformTextView"
+      android:layout_width="wrap_content"
+      android:layout_height="wrap_content"
+      android:textColor="?colorTextPrimary"
+      android:textSize="16sp"
+      tools:text="@sample/features.json/name" />
+
+    <TextView
+      android:id="@+id/description"
+      style="@style/Widget.RtlConformTextView"
+      android:layout_width="wrap_content"
+      android:layout_height="wrap_content"
+      android:textAppearance="?android:attr/textAppearanceSmall"
+      android:textColor="?colorTextSecondary"
+      tools:text="@sample/features.json/description" />
+  </LinearLayout>
+</LinearLayout>

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

@@ -28,6 +28,7 @@
   <string name="connection_service_description">Keeps a connection to your core to allow for notifications, and to transmit messages.</string>
 
   <string name="label_about">About</string>
+  <string name="label_accept">Accept</string>
   <string name="label_avatar">Avatar</string>
   <string name="label_back">Back</string>
   <string name="label_buffer_name">Buffer Name</string>
@@ -109,11 +110,30 @@
   <string name="label_whois_long">Update user information</string>
   <string name="label_yes">Yes</string>
 
+  <string name="label_feature_synchronizedmarkerline">Required for synchronizing the last position in channels</string>
+  <string name="label_feature_saslauthentication">Required for SASL</string>
+  <string name="label_feature_saslexternal">Required for SASL with certificates</string>
+  <string name="label_feature_hideinactivenetworks">Required for hiding inactive networks from chat lists</string>
+  <string name="label_feature_passwordchange">Required for changing passwords from the client</string>
+  <string name="label_feature_capnegotiation">Required for IRCv3 capabilities</string>
+  <string name="label_feature_verifyserverssl">Required for verifying the SSL certificate of IRC networks you connect to</string>
+  <string name="label_feature_customratelimits">Required for custom rate limits for IRC networks</string>
+  <string name="label_feature_awayformattimestamp">Required for custom formatted timestamps in away messages</string>
+  <string name="label_feature_bufferactivitysync">Required for seeing activity of chats in the chat list</string>
+  <string name="label_feature_coresidehighlights">Required for highlights</string>
+  <string name="label_feature_senderprefixes">Required for seeing prefix modes (+, @) of users in channels</string>
+  <string name="label_feature_remotedisconnect">Required for remote disconnects of your own clients</string>
+  <string name="label_feature_richmessages">Required for seeing real names or IRCv3 or Gravatar avatars in messages</string>
+  <string name="label_feature_backlogfiltertype">Required for receiving past notifications after connecting</string>
+
   <string name="notification_channel_background" translatable="false">background</string>
   <string name="notification_channel_connection_title">Connection</string>
   <string name="notification_channel_highlight" translatable="false">highlight</string>
   <string name="notification_channel_highlight_title">Highlight</string>
 
+  <string name="label_missing_features">Missing Features</string>
+  <string name="info_missing_features">Your core is missing features that are required for Quasseldroid to work correctly.</string>
+
   <string name="buffer_delete_confirmation">Do you want to delete this buffer permanently?</string>
 
   <string name="delete_confirmation">Are you sure you want to delete this permanently? This can not be undone.</string>