Adds incoming bubble animations

src/models/message.vala

@@ -1,6 +1,7 @@
 using GLib;
+using Gee;
 
-public class Message : Object 
+public class Message : Object, Comparable<Message>, Hashable<Message>
 {
     public string guid { get; set; default = ""; }
     public string text { get; set; default = ""; }
@@ -9,6 +10,8 @@ public class Message : Object
     
     public Attachment[] attachments { get; set; default = {}; }
 
+    public bool should_animate = false;
+
     public bool from_me {
         get {
             // Hm, this may have been accidental. 
@@ -52,4 +55,20 @@ public class Message : Object
 
         this.attachments = attachments.to_array();
     }
+
+    public int compare_to(Message other) {
+        if (guid == other.guid) {
+            return 0;
+        }
+
+        return 1;
+    }
+
+    public bool equal_to(Message other) {
+        return guid == other.guid;
+    }
+
+    public uint hash() {
+        return guid.hash();
+    }
 }