mai2: implement event reader for pre-dx games

docs/game_specific_info.md

@@ -145,7 +145,7 @@ python read.py --series <Game Code> --version <Version ID> --binfolder /path/to/
 ```
 The importer for maimai DX will import Events, Music and Tickets.
 
-The importer for maimai Pre-DX will import Events and Music. Not all games will have patch data. Milk - Finale have file encryption, and need an AES key. That key is not provided by the developers.
+The importer for maimai Pre-DX will import Events and Music. Not all games will have patch data. Milk - Finale have file encryption, and need an AES key. That key is not provided by the developers. For games that do use encryption, provide the key, as a hex string, with the `--extra` flag. Ex `--extra 00112233445566778899AABBCCDDEEFF`
 
 **Important: It is required to use the importer because some games may not function properly or even crash without Events!**
 

titles/mai2/const.py

@@ -82,5 +82,5 @@ class Mai2Constants:
     @classmethod
     def game_ver_to_string(cls, ver: int):
         if ver >= 1000:
-            return cls.VERSION_STRING_OLD[ver / 1000]
+            return cls.VERSION_STRING_OLD[ver - 1000]
         return cls.VERSION_STRING[ver]

titles/mai2/read.py

@@ -4,6 +4,9 @@ import os
 import re
 import xml.etree.ElementTree as ET
 from typing import Any, Dict, List, Optional
+from Crypto.Cipher import AES
+import zlib
+import codecs
 
 from core.config import CoreConfig
 from core.data import Data
@@ -34,6 +37,7 @@ class Mai2Reader(BaseReader):
 
     def read(self) -> None:
         data_dirs = []
+        if self.version < Mai2Constants.VER_MAIMAI:
             if self.bin_dir is not None:
                 data_dirs += self.get_data_directories(self.bin_dir)
 
@@ -47,6 +51,126 @@ class Mai2Reader(BaseReader):
                 self.read_music(f"{dir}/music")
                 self.read_tickets(f"{dir}/ticket")
         
+        else:
+            self.logger.warn("Pre-DX Readers are not yet implemented!")
+            if not os.path.exists(f"{self.bin_dir}/tables"):
+                self.logger.error(f"tables directory not found in {self.bin_dir}")
+                return
+            
+            if self.version >= Mai2Constants.VER_MAIMAI_MILK:
+                if self.extra is None:
+                    self.logger.error("Milk - Finale requre an AES key via a hex string send as the --extra flag")
+                    return
+                
+                key = bytes.fromhex(self.extra)
+            
+            else:
+                key = None
+            
+            evt_table = self.load_table_raw(f"{self.bin_dir}/tables", "mmEvent.bin", key)
+            txt_table = self.load_table_raw(f"{self.bin_dir}/tables", "mmtextout_jp.bin", key)
+            score_table = self.load_table_raw(f"{self.bin_dir}/tables", "mmScore.bin", key)
+            
+            self.read_old_events(evt_table)
+
+            return
+    
+    def load_table_raw(self, dir: str, file: str, key: Optional[bytes]) -> Optional[List[Dict[str, str]]]:
+        if not os.path.exists(f"{dir}/{file}"):
+            self.logger.warn(f"file {file} does not exist in directory {dir}, skipping")
+            return
+        
+        self.logger.info(f"Load table {file} from {dir}")
+        if key is not None:
+            cipher = AES.new(key, AES.MODE_CBC)
+            with open(f"{dir}/{file}", "rb") as f:
+                f_encrypted = f.read()
+                f_data = cipher.decrypt(f_encrypted)[0x10:]
+        
+        else:
+            with open(f"{dir}/{file}", "rb") as f:
+                f_data = f.read()[0x10:]
+        
+        if f_data is None or not f_data:
+            self.logger.warn(f"file {dir} could not be read, skipping")
+            return
+        
+        f_data_deflate = zlib.decompress(f_data, wbits = zlib.MAX_WBITS | 16)
+        f_decoded = codecs.utf_16_le_decode(f_data_deflate)[0]
+        f_split = f_decoded.splitlines()
+
+        has_struct_def = "struct " in f_decoded
+        is_struct = False
+        struct_def = []
+        tbl_content = []
+
+        if has_struct_def:
+            for x in f_split:
+                if x.startswith("struct "):
+                    is_struct = True
+                    struct_name = x[7:-1]
+                    continue
+                
+                if x.startswith("};"):
+                    is_struct = False
+                    break
+
+                if is_struct:
+                    try:
+                        struct_def.append(x[x.rindex("  ") + 2: -1])
+                    except ValueError:
+                        self.logger.warn(f"rindex failed on line {x}")
+            
+            if is_struct:
+                self.logger.warn("Struct not formatted properly")
+            
+            if not struct_def:
+                self.logger.warn("Struct def not found")
+                    
+        name = file[:file.index(".")]
+        if "_" in name:
+            name = name[:file.index("_")]
+        
+        for x in f_split:
+            if not x.startswith(name.upper()):
+                continue
+            
+            line_match = re.match(r"(\w+)\((.*?)\)([ ]+\/{3}<[ ]+(.*))?", x)
+            if line_match is None:
+                continue
+
+            if not line_match.group(1) == name.upper():
+                self.logger.warn(f"Strange regex match for line {x} -> {line_match}")
+                continue
+            
+            vals = line_match.group(2)
+            comment = line_match.group(4)
+            line_dict = {}
+            
+            vals_split = vals.split(",")
+            for y in range(len(vals_split)):
+                stripped = vals_split[y].strip().lstrip("L\"").lstrip("\"").rstrip("\"")
+                if not stripped or stripped is None:
+                    continue
+
+                if has_struct_def and len(struct_def) > y:
+                    line_dict[struct_def[y]] = stripped
+                
+                else:
+                    line_dict[f'item_{y}'] = stripped
+            
+            if comment:
+                line_dict['comment'] = comment
+            
+            tbl_content.append(line_dict)
+
+        if tbl_content:
+            return tbl_content
+        
+        else:
+            self.logger.warning("Failed load table content, skipping")
+            return
+
     def get_events(self, base_dir: str) -> None:
         self.logger.info(f"Reading events from {base_dir}...")
 
@@ -188,3 +312,16 @@ class Mai2Reader(BaseReader):
                             self.version, id, ticket_type, price, name
                         )
                         self.logger.info(f"Added ticket {id}...")
+
+    def read_old_events(self, events: List[Dict[str, str]]) -> None:
+        for event in events:
+            evt_id = int(event.get('イベントID', '0'))
+            evt_expire_time = float(event.get('オフ時強制時期', '0.0'))
+            is_exp = bool(int(event.get('海外許可', '0')))
+            is_aou = bool(int(event.get('AOU許可', '0')))
+            name = event.get('comment', f'evt_{evt_id}')
+
+            self.data.static.put_game_event(self.version, 0, evt_id, name)
+            
+            if not (is_exp or is_aou):
+                self.data.static.toggle_game_event(self.version, evt_id, False)