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Fixed JSON encoding and decoding for lists, added empty() method

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The new empty() method retrieves an empty instance of the
given object, with all the attributes set to None
This commit is contained in:
Lonami 2016-09-25 10:50:48 +02:00
parent fddb3e9aac
commit b68772aab5
2 changed files with 25 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
telethon/utils/binary_reader.py
View File

@ -117,14 +117,8 @@ class BinaryReader:
# If there was still no luck, give up
raise TypeNotFoundError(constructor_id)
# Now we need to determine the number of parameters of the class, so we can
# instantiate it with all of them set to None, and still, no need to write
# the default =None in all the classes, thus forcing the user to provide a real value
sig = inspect.signature(clazz.__init__)
params = [None] * (len(sig.parameters) - 1) # Subtract 1 (self)
result = clazz(*params) # https://docs.python.org/3/tutorial/controlflow.html#unpacking-argument-lists
# Finally, read the object and return the result
# Create an empty instance of the class, and read its values
result = clazz.empty()
result.on_response(self)
return result

24
telethon_generator/tl_generator.py
View File

@ -133,6 +133,17 @@ class TLGenerator:
TLGenerator.write_onsend_code(builder, arg, tlobject.args)
builder.end_block()
# Generate the empty() function, which returns an "empty"
# instance, in which all attributes are set to None
builder.writeln('@staticmethod')
builder.writeln('def empty():')
builder.writeln('"""Returns an "empty" instance (all attributes are None)"""')
builder.writeln('return {}({})'.format(
TLGenerator.get_class_name(tlobject),
', '.join('None' for _ in range(len(args)))
))
builder.end_block()
# Write the on_response(self, reader) function
builder.writeln('def on_response(self, reader):')
# Do not read constructor's ID, since that's already been read somewhere else
@ -163,6 +174,10 @@ class TLGenerator:
for arg in args:
if TLGenerator.is_tlobject(arg.type):
if arg.is_vector:
builder.writeln("'{0}': [{0}_item.json_encode() "
"for {0}_item in self.{0}],".format(arg.name))
else:
builder.writeln("'{0}': self.{0}.json_encode(),".format(arg.name))
else:
builder.writeln("'{0}': self.{0},".format(arg.name))
@ -175,14 +190,15 @@ class TLGenerator:
builder.writeln('@staticmethod')
builder.writeln('def json_decode(json_string):')
builder.writeln('# Create an empty instance which will be filled with the JSON values')
builder.writeln('instance = {}({})'.format(
TLGenerator.get_class_name(tlobject),
', '.join('None' for _ in range(len(args)))
))
builder.writeln('instance = {}.empty()'.format(TLGenerator.get_class_name(tlobject)))
builder.writeln('dictionary = json.loads(json_string)')
builder.writeln()
for arg in args:
if TLGenerator.is_tlobject(arg.type):
if arg.is_vector:
builder.writeln("instance.{0} = [{0}_item.json_decode() "
"for {0}_item in dictionary['{0}']]".format(arg.name))
else:
builder.writeln("instance.{0} = dictionary['{0}'].json_decode() if '{0}' in dictionary "
"and dictionary['{0}'] is not None else None".format(arg.name))
else: