First attempt to implement JsonSerializable

src/matrix-event-base.vala

@@ -19,7 +19,9 @@
 /**
  * Base class for Matrix events.
  */
-public abstract class Matrix.Event.Base : GLib.Object, GLib.Initable {
+public abstract class Matrix.Event.Base : GLib.Object,
+                                          GLib.Initable,
+                                          Json.Serializable {
     private Error? _construct_error = null;
     private bool _inited = false;
     private Json.Node? _json;
@@ -77,6 +79,8 @@ public abstract class Matrix.Event.Base : GLib.Object, GLib.Initable {
         }
     }
 
+    // Implementation of GLib.Initable
+
     public bool
     init(GLib.Cancellable? cancellable = null)
         throws Error, Matrix.Error
@@ -95,6 +99,39 @@ public abstract class Matrix.Event.Base : GLib.Object, GLib.Initable {
         return true;
     }
 
+    // Implementation of Json.Serializable
+
+
+    public unowned ParamSpec
+    find_property(string name)
+    {
+        return get_class().find_property(name);
+    }
+
+    public Json.Node
+    serialize_property(string property_name,
+                       Value value,
+                       ParamSpec pspec)
+    {
+        return default_serialize_property(property_name, value, pspec);
+    }
+
+    public bool
+    deserialize_property(string property_name,
+                         out Value value,
+                         ParamSpec pspec,
+                         Json.Node property_node)
+    {
+        value = Value(pspec.value_type);
+
+        return default_deserialize_property(property_name,
+                                            value,
+                                            pspec,
+                                            property_node);
+    }
+
+    // Own methods
+
     private void
     initialize_from_json(Json.Node json_data)
         throws Matrix.Error

src/matrix-room.vala

@@ -25,8 +25,12 @@
 public class Matrix.Room : GLib.Object {
     /**
      * The ID of the room this object belongs to.
+     *
+     * If this property is null, then this object is acting as a
+     * temporary stash for another room object, which is used when
+     * calculating state events to be sent by apply_changes().
      */
-    public string room_id { get; construct; }
+    public string? room_id { get; construct; }
 
     /**
      * All the known room aliases.
@@ -155,13 +159,22 @@ public class Matrix.Room : GLib.Object {
     private HashTable<string, MemberData?> _members =
         new HashTable<string, MemberData?>(str_hash, str_equal);
 
+    private Room _stash = null;
+
     /**
      * Create a new Room object.
+     *
+     * @param room_id the ID of the room this object belongs to. For
+     *                null values, see remark at the room_id property.
      */
     public
-    Room(string room_id)
+    Room(string? room_id)
     {
         Object(room_id : room_id);
+
+        if (room_id != null) {
+            _stash = new Room(null);
+        }
     }
 
     /**
@@ -344,4 +357,26 @@ public class Matrix.Room : GLib.Object {
     {
         return _event_levels[event_type];
     }
+
+    /**
+     * Generate a set of events that can change the room state on the
+     * home server similar to what this object shows.
+     */
+    public void
+    apply_changes()
+    {
+        Matrix.Event.Base[] ret = {};
+
+        foreach (var to_add in _aliases) {
+            if (!(to_add in _stash._aliases)) {
+                // add alias
+            }
+        }
+
+        foreach (var to_remove in _stash._aliases) {
+            if (!(to_remove in _aliases)) {
+                // remove alias
+            }
+        }
+    }
 }