1 files changed, 79 insertions, 0 deletions
diff --git a/model.py b/model.py
new file mode 100644
index 0000000..ae2d505
--- /dev/null
+++ b/model.py
@@ -0,0 +1,79 @@
+#
+#    Copyright (C) 2006, 2007, One Laptop Per Child
+#
+#    This program 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 2 of the License, or
+#    (at your option) any later version.
+#
+#    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, write to the Free Software
+#    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+#
+
+import os
+import json
+import sha
+import gobject
+import base64
+
+class Model(gobject.GObject):
+    ''' The model of web-activity which uses json to serialize its data
+    to a file and deserealize from it. 
+    '''
+    __gsignals__ = {
+        'add_link': (gobject.SIGNAL_RUN_FIRST,
+                     gobject.TYPE_NONE, ([int]))
+        }
+    
+    def __init__(self):
+        gobject.GObject.__init__(self)    
+        self.data = {}
+        self.data['shared_links'] = []
+        self.data['deleted'] = []
+        
+    def add_link(self, url, title, thumb, owner, color, timestamp):
+        index = len(self.data['shared_links'])
+        for item in self.data['shared_links']:
+            if timestamp <= item['timestamp']: 
+                index = self.data['shared_links'].index(item)
+                break
+        
+        self.data['shared_links'].insert(index,
+                                         {'hash':sha.new(str(url)).hexdigest(),
+                                          'url':str(url), 'title':str(title),
+                                          'thumb':base64.b64encode(thumb),
+                                          'owner':str(owner), 'color':str(color),
+                                          'timestamp':float(timestamp)} )        
+        self.emit('add_link', index)
+
+    def remove_link(self, hash):
+        for link in self.data['shared_links']:
+            if link['hash'] == hash:
+                self.data['deleted'].append(link['hash'])
+                self.data['shared_links'].remove(link)
+                break                
+        
+    def serialize(self):
+        return json.write(self.data)
+
+    def deserialize(self, data):
+        self.data = json.read(data)
+        if not self.data.has_key('shared_links'):
+            self.data['shared_links'] = []
+        if not self.data.has_key('deleted'):
+            self.data['deleted'] = []
+        
+    def get_links_ids(self):
+        ids = []
+        for link in self.data['shared_links']:
+            ids.append(link['hash'])
+        ids.extend(self.data['deleted'])
+        ids.append('')    
+        return ids
+