provide better control over cursored buffers when getting more items

src/controller/buffersController.py

@@ -351,6 +351,8 @@ class baseBufferController(bufferController):
    items = self.session.get_more_items(self.function, count=self.session.settings["general"]["max_tweets_per_call"], max_id=last_id, *self.args, **self.kwargs)
   except TwythonError as e:
    output.speak(e.message, True)
+  if items == None:
+   return
   for i in items:
    if utils.is_allowed(i, self.session.settings, self.name) == True and utils.find_item(i["id"], self.session.db[self.name]) == None:
     i = self.session.check_quoted_status(i)
@@ -776,6 +778,8 @@ class directMessagesController(baseBufferController):
   except TwythonError as e:
    output.speak(e.message, True)
    return
+  if items == None:
+   return
   sent = []
   for i in items:
    if i["message_create"]["sender_id"] == self.session.db["user_id"]:
@@ -1056,6 +1060,8 @@ class peopleBufferController(baseBufferController):
   except TwythonError as e:
    output.speak(e.message, True)
    return
+  if items == None:
+   return
   for i in items:
    if self.session.settings["general"]["reverse_timelines"] == False:
     self.session.db[self.name]["items"].insert(0, i)
@@ -1178,6 +1184,8 @@ class searchBufferController(baseBufferController):
    items = self.session.search(self.name, count=self.session.settings["general"]["max_tweets_per_call"], max_id=last_id, *self.args, **self.kwargs)
   except TwythonError as e:
    output.speak(e.message, True)
+  if items == None:
+   return
   for i in items:
    if utils.is_allowed(i, self.session.settings, self.name) == True and utils.find_item(i["id"], self.session.db[self.name]) == None:
     i = self.session.check_quoted_status(i)
@@ -1240,6 +1248,8 @@ class searchPeopleBufferController(peopleBufferController):
   except TwythonError as e:
    output.speak(e.message, True)
    return
+  if items == None:
+   return
   for i in items:
    if self.session.settings["general"]["reverse_timelines"] == False:
     self.session.db[self.name]["items"].insert(0, i)

src/sessions/twitter/session.py

@@ -164,15 +164,24 @@ class Session(base.baseSession):
   users, dm bool: If any of these is set to True, the function will treat items as users or dm (they need different handling).
   name str: name of the database item to put new element in."""
   results = []
+  if kwargs.has_key("cursor") and kwargs["cursor"] == 0:
+   output.speak(_(u"There are no more items to retrieve in this buffer."))
+   return
   data = getattr(self.twitter, update_function)(*args, **kwargs)
   if users == True:
    if type(data) == dict and data.has_key("next_cursor"):
-    self.db[name]["cursor"] = data["next_cursor"]
+    if data.has_key("next_cursor"): # There are more objects to retrieve.
+     self.db[name]["cursor"] = data["next_cursor"]
+    else: # Set cursor to 0, wich means no more items available.
+     self.db[name]["cursor"] = 0
     for i in data["users"]: results.append(i)
    elif type(data) == list:
     results.extend(data[1:])
   elif dm == True:
-   self.db[name]["cursor"] = data["next_cursor"]
+   if data.has_key("next_cursor"): # There are more objects to retrieve.
+    self.db[name]["cursor"] = data["next_cursor"]
+   else: # Set cursor to 0, wich means no more items available.
+    self.db[name]["cursor"] = 0
    for i in data["events"]: results.append(i)
   else:
    results.extend(data[1:])
@@ -315,6 +324,8 @@ class Session(base.baseSession):
   # Recently, Twitter's new endpoints have cursor if there are more results.
   if tl.has_key("next_cursor"):
    self.db[name]["cursor"] = tl["next_cursor"]
+  else:
+   self.db[name]["cursor"] = 0
   return num
 
  def check_connection(self):