Improved handling for deleted posts. Now they should display an error

changelog.md

@@ -16,6 +16,7 @@
 * Chats with unread messages will be placed at the top of the chats section. When a chat buffer receives a new message, socializer will move  the buffer to the first position in the chats list. This should make easier for everyone to determine which chats contain unread items. ([#24,](https://code.manuelcortez.net/manuelcortez/socializer/issues/24))
 * In dialogs for displaying posts and comments, and also in the two edit boxes present in chat buffers, it is possible to select all by pressing Control+A.
 * Now it is possible to remove friends directly from the friends buffer. There is a new option for this purpose in the context menu for the focused friend. After being removed, the person will be placed in the subscribers buffer.
+* Deleted posts will display an error message when trying to view details about those. Before, the dialog was created and left blank.
 
 ## Changes in version 0.18 (21.01.2019)
 

src/interactors/postDisplayer.py

@@ -5,6 +5,7 @@ import widgetUtils
 import wx
 from pubsub import pub
 from wxUI import menus
+from wxUI import commonMessages
 from .import base
 
 class displayPostInteractor(base.baseInteractor):
@@ -39,6 +40,9 @@ class displayPostInteractor(base.baseInteractor):
 			raise AttributeError("The control is not present in the view.")
 		getattr(self.view, control).clear()
 
+	def post_deleted(self):
+		msg = commonMessages.post_deleted()
+
 	def install(self, *args, **kwargs):
 		super(displayPostInteractor, self).install(*args, **kwargs)
 		self.view.comments.list.Bind(wx.EVT_LIST_ITEM_ACTIVATED, self.on_show_comment)
@@ -58,6 +62,7 @@ class displayPostInteractor(base.baseInteractor):
 		pub.subscribe(self.add_items, self.modulename+"_add_items")
 		pub.subscribe(self.enable_attachments, self.modulename+"_enable_attachments")
 		pub.subscribe(self.enable_photo_controls, self.modulename+"_enable_photo_controls")
+		pub.subscribe(self.post_deleted, self.modulename+"_post_deleted")
 
 	def uninstall(self):
 		super(displayPostInteractor, self).uninstall()
@@ -66,6 +71,7 @@ class displayPostInteractor(base.baseInteractor):
 		pub.unsubscribe(self.add_items, self.modulename+"_add_items")
 		pub.unsubscribe(self.enable_attachments, self.modulename+"_enable_attachments")
 		pub.unsubscribe(self.enable_photo_controls, self.modulename+"_enable_photo_controls")
+		pub.unsubscribe(self.post_deleted, self.modulename+"_post_deleted")
 
 	def on_focus(self, *args, **kwargs):
 		item = self.view.comments.get_selected()

src/presenters/postDisplayer.py

@@ -56,6 +56,11 @@ class displayPostPresenter(base.basePresenter):
 			else:
 				self.user_identifier = "owner_id"
 			self.post_identifier = "id"
+		result = self.get_post_information()
+		# Stop loading everything else if post was deleted.
+		if result == False:
+			self.interactor.uninstall()
+			return
 		self.worker = threading.Thread(target=self.load_all_components)
 		self.worker.finished = threading.Event()
 		self.worker.start()
@@ -110,6 +115,10 @@ class displayPostPresenter(base.basePresenter):
 		# Retrieve again the post, so we'll make sure to get the most up to date information.
 		# And we add a counter for views.
 		post = self.session.vk.client.wall.getById(posts="{owner_id}_{post_id}".format(owner_id=self.post[self.user_identifier], post_id=self.post[self.post_identifier]))
+		# If this post has been deleted, let's send an event to the interactor so it won't be displayed.
+		if len(post) == 0:
+			self.send_message("post_deleted")
+			return False
 		self.post = post[0]
 		if "views" in self.post and self.post["views"]["count"] > 0:
 			self.send_message("set", control="views", value=str(self.post["views"]["count"]))
@@ -204,7 +213,6 @@ class displayPostPresenter(base.basePresenter):
 		return url
 
 	def load_all_components(self):
-		self.get_post_information()
 		self.get_likes()
 		self.get_reposts()
 		self.get_comments()

src/wxUI/commonMessages.py

@@ -52,3 +52,6 @@ def proxy_question():
 
 def remove_friend(user):
 	return wx.MessageDialog(None, _("Are you sure you want to remove {user1_nom} from your friends?").format(**user), _("Attention"), style=wx.ICON_QUESTION|wx.YES_NO).ShowModal()
+
+def post_deleted():
+	return wx.MessageDialog(None, _("This post has been removed."), _("Error"), wx.ICON_ERROR).ShowModal()