There are different kind of MIGRATE errors that could be
thrown by the Telegram API, as evidenced by this recent
change:
b06f8a8e11
So this rename tries to make it consistent to the new
exception names:
* FILE_MIGRATE_x -> FileMigrationException
* USER_MIGRATE_y -> UserMigrationException
* PHONE_MIGRATE_z -> PhoneMigrationException
Parsing the message of an exception to decide what to do
next is a bad practice, because it's easy that the message
might be changed by mistake in the future. To enforce the
coupling in a stronger way it's better to use exceptions
of different type depending on the kind of error, so that
we rely on the compiler enforcing the behaviour when doing
changes in this error handling areas in the future.
This also makes the code a bit more simple and readable.
Default value of max_id = 0 returns all dialogs
Should return a class with lists of dialog, messages, chats and users.
Add UserForeignConstructor to list of constructors
Add missing detail to DialogConstructor (PeerNotifySettings)
Unpack datastream completely to avoid issue with Ionic exception causing
problems in userForeign parsing
Use more recent code for Dialog construction
