Fix get_entities_text and allow filtering by type

telethon/tl/custom/message.py

@@ -495,13 +495,31 @@ class Message:
         return self._client.download_media(self.original_message,
                                            *args, **kwargs)
 
-    def get_entities_text(self):
+    def get_entities_text(self, cls=None):
         """
         Returns a list of tuples [(:tl:`MessageEntity`, `str`)], the string
         being the inner text of the message entity (like bold, italics, etc).
+
+        Args:
+            cls (`type`):
+                Returns entities matching this type only. For example,
+                the following will print the text for all ``code`` entities:
+
+                >>> from telethon.tl.types import MessageEntityCode
+                >>>
+                >>> m = Message(...)
+                >>> for _, inner_text in m.get_entities_text(MessageEntityCode):
+                >>>     print(inner_text)
         """
-        texts = get_inner_text(self.original_message.message,
-                               self.original_message.entities)
+        if cls and self.original_message.entities:
+            texts = get_inner_text(
+                self.original_message.message,
+                [c for c in self.original_message.entities
+                 if isinstance(c, cls)]
+            )
+        else:
+            texts = get_inner_text(self.original_message.message,
+                                   self.original_message.entities)
         return list(zip(self.original_message.entities, texts))
 
     def click(self, i=None, j=None, *, text=None, filter=None):

telethon/utils.py

@@ -527,29 +527,23 @@ def del_surrogate(text):
     return text.encode('utf-16', 'surrogatepass').decode('utf-16')
 
 
-def get_inner_text(text, entity):
+def get_inner_text(text, entities):
     """
-    Gets the inner text that's surrounded by the given entity or entities.
+    Gets the inner text that's surrounded by the given entities.
     For instance: text = 'hey!', entity = MessageEntityBold(2, 2) -> 'y!'.
 
-    :param text: the original text.
-    :param entity: the entity or entities that must be matched.
+    :param text:     the original text.
+    :param entities: the entity or entities that must be matched.
     :return: a single result or a list of the text surrounded by the entities.
     """
-    if isinstance(entity, TLObject):
-        entity = (entity,)
-        multiple = True
-    else:
-        multiple = False
-
     text = add_surrogate(text)
     result = []
-    for e in entity:
+    for e in entities:
         start = e.offset
         end = e.offset + e.length
         result.append(del_surrogate(text[start:end]))
 
-    return result if multiple else result[0]
+    return result
 
 
 def get_peer_id(peer):