Backport v2 MessageBox

telethon/_updates/entitycache.py

@@ -0,0 +1,54 @@
+from .session import EntityType, Entity
+
+
+_sentinel = object()
+
+
+class EntityCache:
+    def __init__(
+        self,
+        hash_map: dict = _sentinel,
+        self_id: int = None,
+        self_bot: bool = False
+    ):
+        self.hash_map = {} if hash_map is _sentinel else hash_map
+        self.self_id = self_id
+        self.self_bot = self_bot
+
+    def set_self_user(self, id, bot):
+        self.self_id = id
+        self.self_bot = bot
+
+    def get(self, id):
+        try:
+            hash, ty = self.hash_map[id]
+            return Entity(ty, id, hash)
+        except KeyError:
+            return None
+
+    def extend(self, users, chats):
+        # See https://core.telegram.org/api/min for "issues" with "min constructors".
+        self.hash_map.update(
+            (u.id, (
+                u.access_hash,
+                EntityType.BOT if u.bot else EntityType.USER,
+            ))
+            for u in users
+            if getattr(u, 'access_hash', None) and not u.min
+        )
+        self.hash_map.update(
+            (c.id, (
+                c.access_hash,
+                EntityType.MEGAGROUP if c.megagroup else (
+                    EntityType.GIGAGROUP if getattr(c, 'gigagroup', None) else EntityType.CHANNEL
+                ),
+            ))
+            for c in chats
+            if getattr(c, 'access_hash', None) and not getattr(c, 'min', None)
+        )
+
+    def get_all_entities(self):
+        return [Entity(ty, id, hash) for id, (hash, ty) in self.hash_map.items()]
+
+    def put(self, entity):
+        self.hash_map[entity.id] = (entity.hash, entity.ty)