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from .utils import burger_type_to_rust_type, write_packet_file
from ..utils import padded_hex, to_snake_case, to_camel_case
from ..mappings import Mappings
def make_packet_mod_rs_line(packet_id: int, packet_class_name: str):
return f' {padded_hex(packet_id)}: {to_snake_case(packet_class_name)}::{to_camel_case(packet_class_name)},'
def fix_state(state: str):
return {'PLAY': 'game'}.get(state, state.lower())
def generate_packet(burger_packets, mappings: Mappings, target_packet_id, target_packet_direction, target_packet_state):
for packet in burger_packets.values():
if packet['id'] != target_packet_id:
continue
direction = packet['direction'].lower() # serverbound or clientbound
state = fix_state(packet['state'])
if state != target_packet_state or direction != target_packet_direction:
continue
generated_packet_code = []
uses = set()
generated_packet_code.append(
f'#[derive(Clone, Debug, McBuf, {to_camel_case(state)}Packet)]')
uses.add(f'packet_macros::{{{to_camel_case(state)}Packet, McBuf}}')
obfuscated_class_name = packet['class'].split('.')[0].split('$')[0]
class_name = mappings.get_class(
obfuscated_class_name).split('.')[-1].split('$')[0]
generated_packet_code.append(
f'pub struct {to_camel_case(class_name)} {{')
for instruction in packet.get('instructions', []):
if instruction['operation'] == 'write':
obfuscated_field_name = instruction['field']
if '.' in obfuscated_field_name or ' ' in obfuscated_field_name or '(' in obfuscated_field_name:
generated_packet_code.append(f'// TODO: {instruction}')
continue
field_name = mappings.get_field(
obfuscated_class_name, obfuscated_field_name)
if not field_name:
generated_packet_code.append(
f'// TODO: unknown field {instruction}')
continue
field_type = instruction['type']
field_type_rs, is_var, instruction_uses = burger_type_to_rust_type(
field_type)
if is_var:
generated_packet_code.append('#[var]')
generated_packet_code.append(
f'pub {to_snake_case(field_name)}: {field_type_rs},')
uses.update(instruction_uses)
else:
generated_packet_code.append(f'// TODO: {instruction}')
continue
generated_packet_code.append('}')
if uses:
# empty line before the `use` statements
generated_packet_code.insert(0, '')
for use in uses:
generated_packet_code.insert(0, f'use {use};')
print(generated_packet_code)
write_packet_file(state, to_snake_case(class_name),
'\n'.join(generated_packet_code))
print()
mod_rs_dir = f'../azalea-protocol/src/packets/{state}/mod.rs'
with open(mod_rs_dir, 'r') as f:
mod_rs = f.read().splitlines()
pub_mod_line = f'pub mod {to_snake_case(class_name)};'
if pub_mod_line not in mod_rs:
mod_rs.insert(0, pub_mod_line)
packet_mod_rs_line = make_packet_mod_rs_line(
packet['id'], class_name)
in_serverbound = False
in_clientbound = False
for i, line in enumerate(mod_rs):
if line.strip() == 'Serverbound => {':
in_serverbound = True
continue
elif line.strip() == 'Clientbound => {':
in_clientbound = True
continue
elif line.strip() in ('}', '},'):
if (in_serverbound and direction == 'serverbound') or (in_clientbound and direction == 'clientbound'):
mod_rs.insert(i, packet_mod_rs_line)
break
in_serverbound = in_clientbound = False
continue
if line.strip() == '' or line.strip().startswith('//') or (not in_serverbound and direction == 'serverbound') or (not in_clientbound and direction == 'clientbound'):
continue
line_packet_id_hex = line.strip().split(':')[0]
assert line_packet_id_hex.startswith('0x')
line_packet_id = int(line_packet_id_hex[2:], 16)
if line_packet_id > packet['id']:
mod_rs.insert(i, packet_mod_rs_line)
break
with open(mod_rs_dir, 'w') as f:
f.write('\n'.join(mod_rs))
def set_packets(packet_ids: list[int], packet_class_names: list[str], direction: str, state: str):
assert len(packet_ids) == len(packet_class_names)
# sort the packets by id
zipped_packets: list[tuple[int, str]] = [list(x) for x in zip(
*sorted(zip(packet_ids, packet_class_names), key=lambda pair: pair[0]))] # type: ignore
mod_rs_dir = f'../azalea-protocol/src/packets/{state}/mod.rs'
with open(mod_rs_dir, 'r') as f:
mod_rs = f.read().splitlines()
new_mod_rs = []
ignore_lines = False
for line in mod_rs:
if line.strip() == 'Serverbound => {':
if direction == 'serverbound':
ignore_lines = True
for packet_id, packet_class_name in zipped_packets:
new_mod_rs.append(
make_packet_mod_rs_line(packet_id, packet_class_name)
)
else:
ignore_lines = False
elif line.strip() == 'Clientbound => {':
if direction == 'serverbound':
ignore_lines = True
for packet_id, packet_class_name in zipped_packets:
new_mod_rs.append(
make_packet_mod_rs_line(packet_id, packet_class_name)
)
else:
ignore_lines = False
elif line.strip() in ('}', '},'):
ignore_lines = False
if not ignore_lines:
new_mod_rs.append(line)
with open(mod_rs_dir, 'w') as f:
f.write('\n'.join(new_mod_rs))
def get_packets(direction: str, state: str):
mod_rs_dir = f'../azalea-protocol/src/packets/{state}/mod.rs'
with open(mod_rs_dir, 'r') as f:
mod_rs = f.read().splitlines()
in_serverbound = False
in_clientbound = False
packet_ids: list[int] = []
packet_class_names: list[str] = []
for line in mod_rs:
if line.strip() == 'Serverbound => {':
in_serverbound = True
continue
elif line.strip() == 'Clientbound => {':
in_clientbound = True
continue
elif line.strip() in ('}', '},'):
if (in_serverbound and direction == 'serverbound') or (in_clientbound and direction == 'clientbound'):
break
in_serverbound = in_clientbound = False
continue
if line.strip() == '' or line.strip().startswith('//') or (not in_serverbound and direction == 'serverbound') or (not in_clientbound and direction == 'clientbound'):
continue
line_packet_id_hex = line.strip().split(':')[0]
assert line_packet_id_hex.startswith('0x')
line_packet_id = int(line_packet_id_hex[2:], 16)
packet_ids.append(line_packet_id)
packet_class_name = line.strip().split(':')[1].strip()
packet_class_names.append(packet_class_name)
return packet_ids, packet_class_names
def change_packet_ids(id_map: dict[int, int], direction: str, state: str):
existing_packet_ids, existing_packet_class_names = get_packets(
direction, state)
new_packet_ids = []
for packet_id in existing_packet_ids:
new_packet_id = id_map.get(packet_id, packet_id)
new_packet_ids.append(new_packet_id)
set_packets(new_packet_ids, existing_packet_class_names, direction, state)
def remove_packet_ids(packet_ids: list[int], direction: str, state: str):
existing_packet_ids, existing_packet_class_names = get_packets(
direction, state)
new_packet_ids = []
new_packet_class_names = []
for packet_id, packet_class_name in zip(existing_packet_ids, existing_packet_class_names):
if packet_id not in packet_ids:
new_packet_ids.append(packet_id)
new_packet_class_names.append(packet_class_name)
set_packets(new_packet_ids, new_packet_class_names, direction, state)
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