Added `hasJoinedBefore()` to check whether the channel has been joined or not

source/Channel.d

@@ -10,6 +10,7 @@
 import gtk.Box;
 import gtk.ListBox;
 import gtk.Label;
+import gtk.TextView;
 
 public final class Channel
 {
@@ -29,10 +30,10 @@ public final class Channel
     * Users's box
     *    - Label users
     *    - ListBox users
-
     */
-     private ListBox users;
+    private ListBox users;
     private ListBox textArea;
+    private TextView textInput;
 
     this(string channelName)
     {
@@ -62,8 +63,9 @@ public final class Channel
 
         ScrolledWindow scrollTextChats = new ScrolledWindow(textArea);
         textBox.add(scrollTextChats);
-        import gtk.TextView;
-        textBox.add(new TextView());
+        
+        textInput = new TextView();
+        textBox.add(textInput);
         
 
         // import gtk.TextView;
@@ -86,4 +88,8 @@ public final class Channel
         return box;
     }
 
+    public string getName()
+    {
+        return channelName;
+    }
 }

source/Connection.d

@@ -11,6 +11,7 @@ import gtk.ListBox;
 import gtk.Label;
 
 import Channel;
+import std.string;
 
 public final class Connection : Thread
 {
@@ -181,11 +182,32 @@ public final class Connection : Thread
         }
     }
     
+    private bool hasJoinedBefore(string channelName)
+    {
+        bool result;
+
+        foreach(Channel channel; chans)
+        {
+            if(cmp(channel.getName(), channelName))
+            {
+                result = true;
+                break;
+            }
+        }
+
+
+        return result;
+
+    }
+
     private void selectChannel(ListBox s)
     {
         /* Get the name of the channel selected */
         string channelSelected = (cast(Label)(s.getSelectedRow().getChild())).getText();
 
+        /* Check if we have joined this channel already */
+        hasJoinedBefore(channelSelected);
+
         /* Join the channel */
         client.join(channelSelected);