Add json2bin support for different processing modes for optional fields

tools/json2bin/json2bin.py

@@ -3,7 +3,7 @@ import pathlib
 import subprocess
 
 from argparse import ArgumentParser
-from enum import Enum, Flag
+from enum import Enum, Flag, auto
 from types import FunctionType, LambdaType
 
 
@@ -21,6 +21,12 @@ ARGPARSER.add_argument('--output-dir', required=True,
                        help='Output directory where generated files will be written')
 
 
+class OptionalBehavior(Enum):
+    DISALLOW = 0
+    SKIP = auto()
+    PAD = auto()
+
+
 class Parser():
     __slots__ = ('registry', 'padding_index', 'field_index', 'alignment_index')
 
@@ -52,7 +58,7 @@ class Parser():
                  size: int | tuple[int,int],
                  func: FunctionType | LambdaType,
                  const_type: type[Enum] | None = None,
-                 optional: bool = False) -> 'Parser':
+                 optional: OptionalBehavior = OptionalBehavior.DISALLOW) -> 'Parser':
         '''
             Register a function for processing a given key within the JSON
             structure, along with a size of the field in bytes and any
@@ -114,10 +120,14 @@ class Parser():
                 data_key = key[5:] # first 4 characters are a key-prefix
                 data_val = self._walk(data, data_key.split('.'))
                 if data_val == {} or data_val is None:
-                    if optional:
+                    if optional == OptionalBehavior.DISALLOW:
+                        print(json.dumps(data, indent=4))
+                        raise KeyError(data_key)
+                    elif optional == OptionalBehavior.SKIP:
+                        continue
+                    elif optional == OptionalBehavior.PAD:
+                        binary.extend((0).to_bytes(size, 'little'))
                         continue
-                    print(json.dumps(data, indent=4))
-                    raise KeyError(data_key)
 
                 binary.extend(parse_func(data_val, size, const_type))
         return binary

tools/json2bin/pokemon_wotbl_data.py

@@ -11,9 +11,11 @@ from consts.pokemon import (
     species
 )
 
+
 def table_line(move_id: int, level: int) -> bytes:
     return ((move_id & 0x01FF) | ((level & 0x7F) << 9)).to_bytes(2, 'little', signed=False)
 
+
 def parse_level_up_moves(table: dict, _size: int, _enum: None):
     out = []
     for key, value in table.items():
@@ -31,7 +33,7 @@ def parse_level_up_moves(table: dict, _size: int, _enum: None):
 
 SCHEMA = j2b.Parser() \
     .register_name(lambda s: s) \
-    .register('learnset.level_up', 0, parse_level_up_moves, optional=True) \
+    .register('learnset.level_up', 0, parse_level_up_moves, optional=j2b.OptionalBehavior.SKIP) \
     .pad(2, 0xff) \
     .align(4)
 
@@ -60,6 +62,8 @@ FORM_INDICES = {
         'MOW': 507,
     },
 }
+
+
 def indexer(file_path: pathlib.Path) -> int:
     name = file_path.parent.stem.upper()
     if name == '000': return 0