Add basic groupchat functionality

* Add GroupMessage for groupchats
* Add ConferenceWindow for groupchats
* Add ConferenceInfoWidget to get info on a groupchat (more to come)
* Refactor ToxSessionListener to use uint32 instead of uint8[] as id
* Move person and group to meaningful names, make them symbolic
* Make use of status icons for friends
* Create a convenience functions in the vapi to avoid dealing with uint8[] inside the caller

src/core/Contact.vala

@@ -26,6 +26,7 @@ namespace Venom {
     public abstract string get_id();
     public abstract string get_name_string();
     public abstract string get_status_string();
+    public abstract UserStatus get_status();
     public abstract Gdk.Pixbuf get_image();
   }
 }

src/core/Message.vala

@@ -38,7 +38,6 @@ namespace Venom {
     public abstract string get_message_plain();
     public abstract string get_time_plain();
 
-    public abstract string get_notification_header();
     public abstract Gdk.Pixbuf get_sender_image();
 
     public abstract bool equals_message(IMessage m);

src/core/R.vala

@@ -62,8 +62,8 @@ namespace Venom {
       public string offline { get { return "offline-symbolic"; } }
       public string online { get { return "online-symbolic"; } }
 
-      public string default_contact { get { return "person"; } }
-      public string default_groupchat { get { return "group"; } }
+      public string default_contact { get { return "friend-symbolic"; } }
+      public string default_groupchat { get { return "conference-symbolic"; } }
     }
 
     public sealed class StringResource {

src/icons/icons.gresource.xml

@@ -6,7 +6,7 @@
     <file compressed="true">scalable/status/idle-symbolic.svg</file>
     <file compressed="true">scalable/status/offline-symbolic.svg</file>
     <file compressed="true">scalable/status/online-symbolic.svg</file>
-    <file compressed="true">scalable/status/group.svg</file>
-    <file compressed="true">scalable/status/person.svg</file>
+    <file compressed="true">scalable/status/conference-symbolic.svg</file>
+    <file compressed="true">scalable/status/friend-symbolic.svg</file>
   </gresource>
 </gresources>

src/meson.build

@@ -44,6 +44,7 @@ venom_source = files(
 			'tox/DhtNode.vala',
 			'tox/DhtNodeDatabase.vala',
 			'tox/GroupchatContact.vala',
+			'tox/GroupMessage.vala',
 			'tox/JsonWebDhtNodeDatabase.vala',
 			'tox/MessageDatabase.vala',
 			'tox/SqliteDhtNodeDatabase.vala',
@@ -54,6 +55,8 @@ venom_source = files(
 			'ui/AboutDialog.vala',
 			'ui/AddContactWidget.vala',
 			'ui/ApplicationWindow.vala',
+			'ui/ConferenceInfoWidget.vala',
+			'ui/ConferenceWindow.vala',
 			'ui/ContactListEntry.vala',
 			'ui/ContactListWidget.vala',
 			'ui/ConversationWindow.vala',

src/tox/Contact.vala

@@ -23,10 +23,11 @@ namespace Venom {
   public class Contact : IContact, GLib.Object {
     // Saved in toxs savefile
     public string      tox_id          { get; set; }
+    public uint32      tox_friend_number {get; set;}
     public string      name            { get; set; default = ""; }
     public string      status_message  { get; set; default = ""; }
     public DateTime    last_seen       { get; set; default = new DateTime.now_local(); }
-    public uint8       user_status     { get; set; default = (uint8) ToxCore.UserStatus.NONE; }
+    public UserStatus  user_status     { get; set; default = UserStatus.OFFLINE; }
     // Saved in venoms savefile
     public string      note            { get; set; default = ""; }
     public string      alias           { get; set; default = ""; }
@@ -38,7 +39,8 @@ namespace Venom {
     public int         unread_messages { get; set; default = 0; }
     public bool        is_typing       { get; set; default = false; }
 
-    public Contact(string id) {
+    public Contact(uint32 friend_number, string id) {
+      tox_friend_number = friend_number;
       tox_id = id;
     }
 
@@ -47,15 +49,19 @@ namespace Venom {
     }
 
     public virtual string get_name_string() {
-      return name != "" ? name : tox_id;
+      return alias != "" ? alias : (name != "" ? name : tox_id);
     }
 
     public virtual string get_status_string() {
       return status_message;
     }
 
+    public virtual UserStatus get_status() {
+      return user_status;
+    }
+
     public virtual Gdk.Pixbuf get_image() {
-      return tox_image ?? Gtk.IconTheme.get_default().load_icon("person", 48, 0);
+      return tox_image ?? Gtk.IconTheme.get_default().load_icon("friend-symbolic", 48, 0);
     }
   }
 }

src/tox/GroupMessage.vala

@@ -0,0 +1,82 @@
+/*
+ *    GroupMessage.vala
+ *
+ *    Copyright (C) 2018  Venom authors and contributors
+ *
+ *    This file is part of Venom.
+ *
+ *    Venom is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    Venom 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 Venom.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace Venom {
+  public class GroupMessage : IMessage, Object {
+    public unowned IContact contact           { get; protected set; }
+    public uint32 peer_number                 { get; protected set; }
+    public string message                     { get; protected set; }
+
+    public GLib.DateTime timestamp            { get; protected set; }
+    public MessageDirection message_direction { get; protected set; }
+    public bool important                     { get; set; }
+    public bool is_action                     { get; set; }
+    public uint32 message_id                  { get; set; }
+    public bool received                      { get; set; }
+
+    private GroupMessage(IContact contact, MessageDirection direction, string message, GLib.DateTime timestamp) {
+      this.contact = contact;
+      this.message_direction = direction;
+      this.message = message;
+      this.timestamp = timestamp;
+      this.important = false;
+      this.is_action = false;
+    }
+
+    public GroupMessage.outgoing(IContact contact, string message, GLib.DateTime timestamp = new GLib.DateTime.now_local()) {
+      this(contact, MessageDirection.OUTGOING, message, timestamp);
+    }
+
+    public GroupMessage.incoming(IContact contact, uint32 peer_number, string message, GLib.DateTime timestamp = new GLib.DateTime.now_local()) {
+      this(contact, MessageDirection.INCOMING, message, timestamp);
+      this.peer_number = peer_number;
+    }
+
+    public virtual string get_sender_plain() {
+      if (message_direction == MessageDirection.OUTGOING) {
+        return User.instance.name;
+      } else {
+        return "peer %u".printf(peer_number);
+      }
+    }
+
+    public virtual string get_message_plain() {
+      return message;
+    }
+
+    public virtual string get_time_plain() {
+      var now = new DateTime.now_local();
+      if (now.difference(timestamp) > GLib.TimeSpan.DAY) {
+        return timestamp.format("%c");
+      } else {
+        return timestamp.format("%X");
+      }
+    }
+
+    public Gdk.Pixbuf get_sender_image() {
+      return UITools.pixbuf_from_resource(R.icons.default_contact);
+    }
+
+    public bool equals_message(IMessage m) {
+      return false;
+    }
+  }
+}

src/tox/GroupchatContact.vala

@@ -22,29 +22,33 @@
 namespace Venom {
   public class GroupchatContact : IContact, GLib.Object {
     // Saved in toxs savefile
-    public uint32      groupchat_id    { get; set; }
+    public uint32      tox_conference_number { get; set; }
     public string      title           { get; set; }
     public string      status_message  { get; set; default = ""; }
 
-    public GroupchatContact(uint32 id, string title) {
-      groupchat_id = id;
+    public GroupchatContact(uint32 conference_number, string title) {
+      tox_conference_number = conference_number;
       this.title = title;
     }
 
     public virtual string get_id() {
-      return groupchat_id.to_string();
+      return tox_conference_number.to_string();
     }
 
     public virtual string get_name_string() {
-      return title != "" ? title : groupchat_id.to_string();
+      return title != "" ? title : tox_conference_number.to_string();
     }
 
     public virtual string get_status_string() {
       return status_message;
     }
 
+    public virtual UserStatus get_status() {
+      return UserStatus.ONLINE;
+    }
+
     public virtual Gdk.Pixbuf get_image() {
-      return Gtk.IconTheme.get_default().load_icon("group", 48, 0);
+      return Gtk.IconTheme.get_default().load_icon(R.icons.default_groupchat, 48, 0);
     }
   }
 }