Process updated posts from sync server

boards/management/commands/invalidate_sync_cache.py

@@ -15,8 +15,6 b' class Command(BaseCommand):'
         for global_id in GlobalId.objects.exclude(content__isnull=True).exclude(
                 content=''):
             if global_id.is_local():
-                global_id.content = None
-                global_id.save()
-                global_id.signature_set.all().delete()
+                global_id.clear_cache()
                 count += 1
         print('Invalidated {} caches.'.format(count))

boards/management/commands/sync_with_server.py

@@ -50,10 +50,11 b' class Command(BaseCommand):'
             else:
                 raise Exception('Invalid global ID')
         else:
-            print('Running LIST request')
+            print('Running LIST request...')
             h = httplib2.Http()
             xml = GlobalId.objects.generate_request_list()
             response, content = h.request(list_url, method="POST", body=xml)
+            print('Processing response...')
 
             root = ET.fromstring(content)
             status = root.findall('status')[0].text
@@ -78,8 +79,9 b' class Command(BaseCommand):'
                     for offset in range(0, len(ids_to_sync), limit):
                         xml = GlobalId.objects.generate_request_get(ids_to_sync[offset:offset+limit])
                         h = httplib2.Http()
-                        print('Running GET request')
+                        print('Running GET request...')
                         response, content = h.request(get_url, method="POST", body=xml)
+                        print('Processing response...')
 
                         SyncManager.parse_response_get(content, file_url)
                 else:

boards/models/post/__init__.py

@@ -388,9 +388,10 b' class Post(models.Model, Viewable):'
         self.version = F('version') + 1
 
     def clear_cache(self):
+        """
+        Clears sync data (content cache, signatures etc).
+        """
         global_id = self.global_id
         if global_id is not None and global_id.is_local()\
                 and global_id.content is not None:
-            global_id.content = None
-            global_id.save()
-            global_id.signature_set.all().delete()
+            global_id.clear_cache()

boards/models/post/manager.py

@@ -130,7 +130,7 b' class PostManager(models.Manager):'
     @transaction.atomic
     def import_post(self, title: str, text: str, pub_time: str, global_id,
                     opening_post=None, tags=list(), files=list(),
-                    tripcode=None):
+                    tripcode=None, version=1):
         is_opening = opening_post is None
         if is_opening:
             thread = boards.models.thread.Thread.objects.create(
@@ -139,20 +139,43 b' class PostManager(models.Manager):'
         else:
             thread = opening_post.get_thread()
 
-        post = self.create(title=title, text=text,
+        post = self.create(title=title,
+                           text=text,
                            pub_time=pub_time,
                            poster_ip=NO_IP,
                            last_edit_time=pub_time,
                            global_id=global_id,
                            opening=is_opening,
-                           thread=thread, tripcode=tripcode)
+                           thread=thread,
+                           tripcode=tripcode,
+                           version=version)
 
-        # TODO Add files
         for file in files:
             self._add_file_to_post(file, post)
 
         post.threads.add(thread)
 
+    @transaction.atomic
+    def update_post(self, post, title: str, text: str, pub_time: str,
+                    tags=list(), files=list(), tripcode=None, version=1):
+        post.title = title
+        post.text = text
+        post.pub_time = pub_time
+        post.tripcode = tripcode
+        post.version = version
+        post.save()
+
+        post.clear_cache()
+
+        post.images.clear()
+        post.attachments.clear()
+        for file in files:
+            self._add_file_to_post(file, post)
+
+        thread = post.get_thread()
+        thread.tags.clear()
+        list(map(thread.tags.add, tags))
+
     def _add_file_to_post(self, file, post):
         file_type = file.name.split('.')[-1].lower()
         if file_type in IMAGE_TYPES:

boards/models/post/sync.py

@@ -172,8 +172,10 b' class SyncManager:'
                 global_id, exists = GlobalId.from_xml_element(tag_id)
                 signatures = SyncManager._verify_model(global_id, content_str, tag_model)
 
-                if exists:
-                    print('Post with same ID already exists')
+                version = int(tag_content.find(TAG_VERSION).text)
+                is_old = exists and global_id.post.version < version
+                if exists and not is_old:
+                    print('Post with same ID exists and is up to date.')
                 else:
                     global_id.content = content_str
                     global_id.save()
@@ -227,11 +229,20 b' class SyncManager:'
 
                         files.append(attached_file)
 
+                    if is_old:
+                        post = global_id.post
+                        Post.objects.update_post(
+                            post, title=title, text=text, pub_time=pub_time,
+                            tags=tags, files=files, tripcode=tripcode,
+                            version=version)
+                        print('Parsed updated post {}'.format(global_id))
+                    else:
                     Post.objects.import_post(
                         title=title, text=text, pub_time=pub_time,
                         opening_post=opening_post, tags=tags,
-                        global_id=global_id, files=files, tripcode=tripcode)
-                print('Parsed post {}'.format(global_id))
+                            global_id=global_id, files=files, tripcode=tripcode,
+                            version=version)
+                        print('Parsed new post {}'.format(global_id))
         else:
             raise SyncException(EXCEPTION_NODE.format(tag_status.text))
 

boards/models/signature.py

@@ -130,6 +130,14 b' class GlobalId(models.Model):'
         return KeyPair.objects.filter(
                 key_type=self.key_type, public_key=self.key).exists()
 
+    def clear_cache(self):
+        """
+        Removes content cache and signatures.
+        """
+        self.content = None
+        self.save()
+        self.signature_set.all().delete()
+
 
 class Signature(models.Model):
     class Meta:

boards/tests/test_sync.py

@@ -1,3 +1,5 b''
+from django.test import TestCase
+
 from boards.models import KeyPair, Post, Tag
 from boards.models.post.sync import SyncManager
 from boards.tests.mocks import MockRequest
@@ -6,9 +8,6 b' from boards.views.sync import response_g'
 __author__ = 'neko259'
 
 
-from django.test import TestCase
-
-
 class SyncTest(TestCase):
     def test_get(self):
         """