feat: parse kwm v2 key from mmkv

src/util/MMKVParser.ts

@@ -1,3 +1,4 @@
+import type { StagingKWMv2Key } from '~/features/settings/keyFormats';
 import { formatHex } from './formatHex';
 
 const textDecoder = new TextDecoder('utf-8', { ignoreBOM: true });
@@ -85,6 +86,15 @@ export class MMKVParser {
     return result;
   }
 
+  public skipContainer() {
+    // Container [
+    //   len: int,
+    //   data: variant
+    // ]
+    const containerLen = this.readInt();
+    this.offset += containerLen;
+  }
+
   public static toStringMap(view: DataView): Map<string, string> {
     const mmkv = new MMKVParser(view);
     const result = new Map<string, string>();
@@ -96,7 +106,21 @@ export class MMKVParser {
     return result;
   }
 
-  public static parseKuwoEKey(_view: DataView): unknown[] {
-    return [];
+  public static parseKuwoEKey(view: DataView) {
+    const mmkv = new MMKVParser(view);
+    const result: Omit<StagingKWMv2Key, 'id'>[] = [];
+    while (!mmkv.eof) {
+      const key = mmkv.readString();
+      const idMatch = key.match(/^sec_ekey#(\d+)-(.+)/);
+      if (!idMatch) {
+        mmkv.skipContainer();
+        continue;
+      }
+
+      const [_, rid, quality] = idMatch;
+      const ekey = mmkv.readVariantString();
+      result.push({ rid, quality, ekey });
+    }
+    return result;
   }
 }