Completely change errors (make one class for each)

telethon/errors/__init__.py

@@ -0,0 +1,43 @@
+import re
+
+from .common import (
+    ReadCancelledError, InvalidParameterError, TypeNotFoundError,
+    InvalidChecksumError
+)
+
+from .rpc_errors import (
+    RPCError, InvalidDCError, BadRequestError, UnauthorizedError,
+    ForbiddenError, NotFoundError, FloodError, ServerError, BadMessageError
+)
+
+from .rpc_errors_303 import *
+from .rpc_errors_400 import *
+from .rpc_errors_401 import *
+from .rpc_errors_420 import *
+
+
+def rpc_message_to_error(code, message):
+    errors = {
+        303: rpc_303_errors,
+        400: rpc_400_errors,
+        401: rpc_401_errors,
+        420: rpc_420_errors
+    }.get(code, None)
+
+    if errors is not None:
+        for msg, cls in errors.items():
+            m = re.match(msg, message)
+            if m:
+                extra = int(m.group(1)) if m.groups() else None
+                return cls(extra=extra)
+
+    elif code == 403:
+        return ForbiddenError()
+
+    elif code == 404:
+        return NotFoundError()
+
+    elif code == 500:
+        return ServerError()
+
+    return RPCError('{} (code {})'.format(message, code))