@lenml/char-card-reader/dist/main.mjs.map

SillyTavern character card info reader

{"version":3,"sources":["../src/utils.ts","../src/CharacterBook.ts","../src/metadata/jpeg.ts","../src/metadata/png.ts","../src/metadata/webp.ts","../src/metadata/parser.ts","../src/types.ts","../src/CharacterCard.ts"],"sourcesContent":["export function toBase64(\r\n  input: Blob | Buffer | ArrayBuffer | Uint8Array\r\n): Promise<string> {\r\n  if (typeof Buffer !== \"undefined\" && Buffer.isBuffer(input)) {\r\n    // Node.js Buffer\r\n    return Promise.resolve(input.toString(\"base64\"));\r\n  }\r\n\r\n  if (typeof Blob !== \"undefined\" && input instanceof Blob) {\r\n    // Browser Blob\r\n    return new Promise((resolve, reject) => {\r\n      const reader = new FileReader();\r\n      reader.onload = () => {\r\n        const result = reader.result as string;\r\n        const base64 = result.split(\",\")[1]; // data:*/*;base64,...\r\n        resolve(base64);\r\n      };\r\n      reader.onerror = reject;\r\n      reader.readAsDataURL(input);\r\n    });\r\n  }\r\n\r\n  // ArrayBuffer or Uint8Array\r\n  let uint8: Uint8Array;\r\n  if (input instanceof ArrayBuffer) {\r\n    uint8 = new Uint8Array(input);\r\n  } else if (input instanceof Uint8Array) {\r\n    uint8 = input;\r\n  } else {\r\n    throw new TypeError(\"Unsupported input type\");\r\n  }\r\n\r\n  if (typeof Buffer !== \"undefined\") {\r\n    // Node.js environment\r\n    return Promise.resolve(Buffer.from(uint8).toString(\"base64\"));\r\n  } else {\r\n    // Browser: use btoa\r\n    let binary = \"\";\r\n    for (let i = 0; i < uint8.length; i++) {\r\n      binary += String.fromCharCode(uint8[i]);\r\n    }\r\n    return Promise.resolve(btoa(binary));\r\n  }\r\n}\r\n\r\nexport function isValidImageUrl(url: any) {\r\n  if (typeof url !== \"string\") {\r\n    return false;\r\n  }\r\n  // http 或者 data:\r\n  if (\r\n    url.startsWith(\"http://\") ||\r\n    url.startsWith(\"https://\") ||\r\n    url.startsWith(\"data:\")\r\n  ) {\r\n    return true;\r\n  }\r\n\r\n  return false;\r\n}\r\n\r\nexport const deepClone: <T>(x: T) => T = globalThis.structuredClone\r\n  ? globalThis.structuredClone\r\n  : <T>(x: T): T => JSON.parse(JSON.stringify(x));\r\n\r\nexport class Base64 {\r\n  static encode(input: string): string {\r\n    if (typeof window !== \"undefined\" && typeof window.btoa === \"function\") {\r\n      return window.btoa(unescape(encodeURIComponent(input)));\r\n    } else if (typeof Buffer !== \"undefined\") {\r\n      return Buffer.from(input, \"utf-8\").toString(\"base64\");\r\n    } else {\r\n      throw new Error(\"Base64.encode: Environment not supported.\");\r\n    }\r\n  }\r\n\r\n  static decode(base64: string): string {\r\n    if (typeof window !== \"undefined\" && typeof window.atob === \"function\") {\r\n      return decodeURIComponent(escape(window.atob(base64)));\r\n    } else if (typeof Buffer !== \"undefined\") {\r\n      return Buffer.from(base64, \"base64\").toString(\"utf-8\");\r\n    } else {\r\n      throw new Error(\"Base64.decode: Environment not supported.\");\r\n    }\r\n  }\r\n}\r\n\r\nfunction isDeepEqual(a: any, b: any) {\r\n  if (a === b) {\r\n    return true;\r\n  }\r\n  if (\r\n    a === null ||\r\n    b === null ||\r\n    typeof a !== \"object\" ||\r\n    typeof b !== \"object\"\r\n  ) {\r\n    return false;\r\n  }\r\n  if (Array.isArray(a) && Array.isArray(b)) {\r\n    if (a.length !== b.length) {\r\n      return false;\r\n    }\r\n    for (let i = 0; i < a.length; i++) {\r\n      if (!isDeepEqual(a[i], b[i])) {\r\n        return false;\r\n      }\r\n    }\r\n    return true;\r\n  }\r\n  const keys = Object.keys(a);\r\n  if (keys.length !== Object.keys(b).length) {\r\n    return false;\r\n  }\r\n  for (const key of keys) {\r\n    if (!isDeepEqual(a[key], b[key])) {\r\n      return false;\r\n    }\r\n  }\r\n  return true;\r\n}\r\n\r\nfunction isObject(x: any): x is object {\r\n  return typeof x === \"object\" && x !== null;\r\n}\r\nfunction isNoNone(x: any): x is any {\r\n  return x !== undefined && x !== null;\r\n}\r\n/**\r\n * Recursively merge objects into a single object.\r\n *\r\n * If all values for a key are objects, merge them recursively.\r\n * If any value for a key is not an object, take the last non-null value.\r\n * @param {...any[]} objects objects to merge\r\n * @returns merged object\r\n */\r\nexport function mergeObjects(...objects: any[]): any {\r\n  const keys = new Set(objects.flatMap(Object.keys));\r\n  return Object.fromEntries(\r\n    Array.from(keys).map((key) => {\r\n      const vals = objects.map((x) => x[key]);\r\n      if (vals.some(Array.isArray)) {\r\n        // NOTE: 直接用最后一个非空，数组没有合并逻辑\r\n        return [key, [...vals].reverse().filter(isNoNone).filter(Boolean)[0]];\r\n      }\r\n      if (vals.some(isObject)) {\r\n        return [key, mergeObjects(...vals.filter(isObject))];\r\n      }\r\n      return [key, [...vals].reverse().filter(isNoNone)[0]];\r\n    })\r\n  );\r\n}\r\nexport function uniq<T>(arr: T[]): T[] {\r\n  return Array.from(new Set(arr));\r\n}\r\n","import { SpecV3 } from \"./spec_types/spec_v3\";\r\nimport { deepClone, uniq } from \"./utils\";\r\n\r\n// lorebook\r\nexport class CharacterBook implements SpecV3.Lorebook {\r\n  static from_json(data: any) {\r\n    if (typeof data !== \"object\" || data === null) {\r\n      throw new Error(\"data must be an object\");\r\n    }\r\n    let entries: any[] = [];\r\n    if (Array.isArray(data)) {\r\n      entries = data;\r\n    } else {\r\n      entries =\r\n        // from lorabook.json\r\n        Array.isArray(data?.entries)\r\n          ? data.entries\r\n          : // from character card\r\n          Array.isArray(data?.data?.character_book?.entries)\r\n          ? data.data.character_book.entries\r\n          : [];\r\n    }\r\n    const book = new CharacterBook(entries);\r\n    const character_book =\r\n      data?.character_book ?? data?.data?.character_book ?? data;\r\n    book.name = character_book?.name;\r\n    book.description = character_book?.description;\r\n    book.recursive_scanning = character_book?.recursive_scanning ?? true;\r\n    book.scan_depth = character_book?.scan_depth ?? 10;\r\n    book.extensions = character_book?.extensions ?? {};\r\n    return book;\r\n  }\r\n\r\n  name: string = \"unknown\";\r\n  description: string = \"\";\r\n  // TODO\r\n  token_budget?: number;\r\n  recursive_scanning: boolean = true;\r\n  extensions: SpecV3.Lorebook[\"extensions\"] = {};\r\n  entries: SpecV3.Lorebook[\"entries\"] = [];\r\n  scan_depth?: number | undefined = 10;\r\n\r\n  constructor(entries: SpecV3.Lorebook[\"entries\"] = []) {\r\n    this.entries = deepClone(entries);\r\n    this._keys_fix();\r\n  }\r\n\r\n  public _keys_fix() {\r\n    const pattern = /[,|;，；]/g;\r\n    // 修复 keys ，有部分情况 keys 错误可能导致搜索出错\r\n    for (const entry of this.entries) {\r\n      const { keys } = entry;\r\n      const fixed_keys: string[] = [];\r\n      for (const k of keys) {\r\n        if (pattern.test(k)) {\r\n          fixed_keys.push(\r\n            ...k\r\n              .split(pattern)\r\n              .map((x) => x.trim())\r\n              .filter(Boolean)\r\n          );\r\n        } else {\r\n          fixed_keys.push(k);\r\n        }\r\n      }\r\n      entry.keys = fixed_keys;\r\n    }\r\n  }\r\n\r\n  private _scan(\r\n    context: string,\r\n    matched: SpecV3.Lorebook[\"entries\"] = [],\r\n    current_depth = 1\r\n  ): SpecV3.Lorebook[\"entries\"] {\r\n    if (current_depth >= (this.scan_depth ?? 10)) {\r\n      return uniq(matched);\r\n    }\r\n    const current_context = [\r\n      context,\r\n      ...uniq(matched).map((x) => x.content),\r\n    ].join(\"\\n\");\r\n    const pending_entries = this.entries\r\n      .filter((x) => x.content?.trim())\r\n      .filter((x) => x.enabled && !matched.includes(x));\r\n    if (pending_entries.length === 0) {\r\n      return uniq(matched);\r\n    }\r\n    for (const entry of pending_entries) {\r\n      const is_matched = entry.keys.some((k) => current_context.includes(k));\r\n      if (is_matched) {\r\n        matched.push(entry);\r\n      }\r\n    }\r\n    if (this.recursive_scanning) {\r\n      return this._scan(context, matched, current_depth + 1);\r\n    }\r\n    return uniq(matched);\r\n  }\r\n  public scan(context: string): SpecV3.Lorebook[\"entries\"] {\r\n    const matched = this._scan(context);\r\n    const constant = this.entries.filter(\r\n      (x) => x.constant && x.enabled && x.content?.trim()\r\n    );\r\n    return uniq([...matched, ...constant]).sort(\r\n      (a, b) => a.insertion_order - b.insertion_order\r\n    );\r\n  }\r\n}\r\n","import { JpegSegment } from \"./types\";\r\n\r\nexport namespace JPEG {\r\n  export function parse_chunks(data: Uint8Array): JpegSegment[] {\r\n    const segments: JpegSegment[] = [];\r\n\r\n    let offset = 2;\r\n    while (offset < data.length) {\r\n      if (data[offset] !== 0xff)\r\n        throw new Error(`Invalid marker at offset ${offset}`);\r\n\r\n      let marker = data[offset + 1];\r\n      while (marker === 0xff) {\r\n        offset++;\r\n        marker = data[offset + 1];\r\n      }\r\n\r\n      const markerOffset = offset;\r\n      offset += 2;\r\n\r\n      if (marker === 0xd9 || marker === 0xda) break;\r\n\r\n      const length = (data[offset] << 8) | data[offset + 1];\r\n      const payloadStart = offset + 2;\r\n      const payloadEnd = payloadStart + length - 2;\r\n      const segmentData = data.slice(payloadStart, payloadEnd);\r\n\r\n      const info: JpegSegment = {\r\n        marker: `FF ${marker.toString(16).toUpperCase().padStart(2, \"0\")}`,\r\n        offset: markerOffset,\r\n        length,\r\n        type: \"Other\",\r\n        preview: Array.from(segmentData.slice(0, 16))\r\n          .map((b) => b.toString(16).padStart(2, \"0\"))\r\n          .join(\" \"),\r\n      };\r\n\r\n      if (\r\n        marker === 0xe0 &&\r\n        String.fromCharCode(...segmentData.slice(0, 5)) === \"JFIF\\0\"\r\n      ) {\r\n        info.type = \"JFIF\";\r\n      } else if (marker === 0xe1) {\r\n        const id = String.fromCharCode(...segmentData.slice(0, 6));\r\n        if (id.startsWith(\"Exif\")) info.type = \"EXIF\";\r\n        else if (\r\n          String.fromCharCode(...segmentData.slice(0, 29)).includes(\r\n            \"http://ns.adobe.com/xap/1.0/\"\r\n          )\r\n        ) {\r\n          info.type = \"XMP\";\r\n        } else info.type = \"APP1\";\r\n      } else if (marker === 0xfe) {\r\n        info.type = \"Comment\";\r\n        info.comment = new TextDecoder().decode(segmentData);\r\n      }\r\n\r\n      segments.push(info);\r\n      offset = payloadEnd;\r\n    }\r\n\r\n    return segments;\r\n  }\r\n\r\n  /**\r\n   * 核心：解析 TIFF 结构并提取 UserComment\r\n   * 兼容 JPEG Exif 和 WebP Exif\r\n   * @param buffer 完整文件的二进制数据\r\n   * @param tiffStart TIFF 头 (II/MM) 在 buffer 中的绝对偏移量\r\n   */\r\n  function parseTiffUserComment(\r\n    buffer: Uint8Array,\r\n    tiffStart: number\r\n  ): string | undefined {\r\n    // 1. 边界检查\r\n    if (tiffStart >= buffer.length) return undefined;\r\n\r\n    // 2. 确定字节序 (Endianness)\r\n    // II = 0x4949 (Little Endian), MM = 0x4d4d (Big Endian)\r\n    const byteOrderMarker = (buffer[tiffStart] << 8) | buffer[tiffStart + 1];\r\n    let isLittleEndian = false;\r\n\r\n    if (byteOrderMarker === 0x4949) isLittleEndian = true;\r\n    else if (byteOrderMarker === 0x4d4d) isLittleEndian = false;\r\n    else return undefined; // 不是合法的 TIFF 结构\r\n\r\n    // 定义读取器 (闭包捕获配置)\r\n    const readU16 = (offset: number) => {\r\n      const p = tiffStart + offset;\r\n      if (p + 2 > buffer.length) return 0;\r\n      return isLittleEndian\r\n        ? buffer[p] | (buffer[p + 1] << 8)\r\n        : (buffer[p] << 8) | buffer[p + 1];\r\n    };\r\n\r\n    const readU32 = (offset: number) => {\r\n      const p = tiffStart + offset;\r\n      if (p + 4 > buffer.length) return 0;\r\n      // 使用 >>> 0 转换为无符号整数\r\n      return isLittleEndian\r\n        ? (buffer[p] |\r\n            (buffer[p + 1] << 8) |\r\n            (buffer[p + 2] << 16) |\r\n            (buffer[p + 3] << 24)) >>>\r\n            0\r\n        : ((buffer[p] << 24) |\r\n            (buffer[p + 1] << 16) |\r\n            (buffer[p + 2] << 8) |\r\n            buffer[p + 3]) >>>\r\n            0;\r\n    };\r\n\r\n    // 3. 查找 IFD Tag 的通用函数\r\n    const findTag = (ifdOffset: number, targetId: number) => {\r\n      const count = readU16(ifdOffset);\r\n      for (let i = 0; i < count; i++) {\r\n        const entryOff = ifdOffset + 2 + i * 12;\r\n        if (readU16(entryOff) === targetId) {\r\n          return {\r\n            type: readU16(entryOff + 2),\r\n            count: readU32(entryOff + 4),\r\n            // 注意：这里返回的是 Value 字段的偏移量\r\n            valueOffsetField: entryOff + 8,\r\n          };\r\n        }\r\n      }\r\n      return null;\r\n    };\r\n\r\n    // 4. 执行查找路径：0th IFD -> Exif SubIFD (0x8769) -> UserComment (0x9286)\r\n\r\n    // 获取 0th IFD 偏移量 (TIFF头后的4字节)\r\n    const offset0th = readU32(4);\r\n    if (offset0th === 0) return undefined;\r\n\r\n    // 步骤 A: 找 ExifOffset (0x8769)\r\n    let targetIfd = offset0th;\r\n    const exifTag = findTag(offset0th, 0x8769);\r\n    if (exifTag) {\r\n      targetIfd = readU32(exifTag.valueOffsetField);\r\n    }\r\n\r\n    // 步骤 B: 找 UserComment (0x9286)\r\n    const commentTag = findTag(targetIfd, 0x9286);\r\n    if (!commentTag) return undefined;\r\n\r\n    // 5. 提取数据\r\n    const { count, valueOffsetField } = commentTag;\r\n\r\n    // 获取数据指针\r\n    // UserComment 长度通常远大于4字节，所以 Value Offset 字段存的是数据的指针\r\n    let dataPtr = readU32(valueOffsetField);\r\n\r\n    // 防御性处理：极少数情况数据 <= 4字节会直接存如果不存指针\r\n    if (count <= 4) dataPtr = valueOffsetField; // (虽然 UserComment 基本不可能)\r\n\r\n    const absStart = tiffStart + dataPtr;\r\n    const rawData = buffer.slice(absStart, absStart + count);\r\n\r\n    // 6. 解码 (处理 ASCII\\0\\0\\0 等前缀)\r\n    const header = String.fromCharCode(...rawData.slice(0, 8));\r\n    if (header.startsWith(\"ASCII\\0\\0\\0\")) {\r\n      return new TextDecoder(\"utf-8\").decode(rawData.slice(8));\r\n    } else if (header.startsWith(\"UNICODE\\0\")) {\r\n      return new TextDecoder(\"utf-16\").decode(rawData.slice(8));\r\n    } else {\r\n      // 某些非标写法没有头，直接尝试解码\r\n      return new TextDecoder(\"utf-8\").decode(rawData);\r\n    }\r\n  }\r\n\r\n  /**\r\n   * extract jpeg user comment\r\n   */\r\n  export function extract_user_comment(\r\n    fullFileBuffer: Uint8Array,\r\n    segment: any\r\n  ): string | undefined {\r\n    if (segment.type !== \"EXIF\") return undefined;\r\n\r\n    // segment.offset 指向 FF (Marker Start)\r\n    // +2 bytes = Length\r\n    // +2 bytes = Length Value\r\n    // = +4 bytes 到达 Payload (Exif Header)\r\n    // +6 bytes (Exif\\0\\0) 到达 TIFF Header\r\n    const tiffStart = segment.offset + 10;\r\n\r\n    return parseTiffUserComment(fullFileBuffer, tiffStart);\r\n  }\r\n}\r\n","import { PngChunk } from \"./types\";\r\n\r\nexport namespace PNG {\r\n  export function parse_chunks(data: Uint8Array): PngChunk[] {\r\n    const chunks: PngChunk[] = [];\r\n    let offset = 8;\r\n\r\n    while (offset < data.length) {\r\n      if (offset + 8 > data.length) break;\r\n\r\n      const length =\r\n        ((data[offset] << 24) |\r\n          (data[offset + 1] << 16) |\r\n          (data[offset + 2] << 8) |\r\n          data[offset + 3]) >>>\r\n        0;\r\n\r\n      const type = String.fromCharCode(\r\n        data[offset + 4],\r\n        data[offset + 5],\r\n        data[offset + 6],\r\n        data[offset + 7]\r\n      );\r\n\r\n      const chunkStart = offset + 8;\r\n      const chunkEnd = chunkStart + length;\r\n      if (chunkEnd + 4 > data.length) break;\r\n\r\n      const chunkData = data.slice(chunkStart, chunkEnd);\r\n      const crc =\r\n        ((data[chunkEnd] << 24) |\r\n          (data[chunkEnd + 1] << 16) |\r\n          (data[chunkEnd + 2] << 8) |\r\n          data[chunkEnd + 3]) >>>\r\n        0;\r\n\r\n      const chunk: PngChunk = { type, length, crc };\r\n\r\n      if (type === \"IHDR\") {\r\n        chunk.width =\r\n          ((chunkData[0] << 24) |\r\n            (chunkData[1] << 16) |\r\n            (chunkData[2] << 8) |\r\n            chunkData[3]) >>>\r\n          0;\r\n        chunk.height =\r\n          ((chunkData[4] << 24) |\r\n            (chunkData[5] << 16) |\r\n            (chunkData[6] << 8) |\r\n            chunkData[7]) >>>\r\n          0;\r\n        chunk.bitDepth = chunkData[8];\r\n        chunk.colorType = chunkData[9];\r\n      } else if (type === \"tEXt\") {\r\n        const text = new TextDecoder().decode(chunkData);\r\n        const sep = text.indexOf(\"\\0\");\r\n        if (sep >= 0) {\r\n          chunk.keyword = text.slice(0, sep);\r\n          chunk.text = text.slice(sep + 1);\r\n        } else {\r\n          chunk.rawText = text;\r\n        }\r\n      }\r\n\r\n      chunks.push(chunk);\r\n      offset = chunkEnd + 4;\r\n    }\r\n\r\n    return chunks;\r\n  }\r\n}\r\n","import { WebPChunk } from \"./types\";\r\n\r\nexport namespace WebP {\r\n  export function extract_user_comment(\r\n    fullFileBuffer: Uint8Array,\r\n    chunk: { offset: number; length: number }\r\n  ): string | undefined {\r\n    // 1. 确定数据起始位置\r\n    // 假设 chunk.offset 指向的是 \"EXIF\" 标签的起始位置\r\n    // 结构: [TAG: 4bytes][SIZE: 4bytes][DATA...]\r\n    let tiffStart = chunk.offset + 8;\r\n\r\n    // 边界检查\r\n    if (tiffStart >= fullFileBuffer.length) return undefined;\r\n\r\n    // --- 检测并跳过 \"Exif\\0\\0\" 前缀 ---\r\n    // 0x45('E'), 0x78('x'), 0x69('i'), 0x66('f')\r\n    if (\r\n      fullFileBuffer[tiffStart] === 0x45 &&\r\n      fullFileBuffer[tiffStart + 1] === 0x78 &&\r\n      fullFileBuffer[tiffStart + 2] === 0x69 &&\r\n      fullFileBuffer[tiffStart + 3] === 0x66\r\n    ) {\r\n      // 这是一个脏数据（JPEG APP1 header），WebP 中应当跳过这 6 字节\r\n      tiffStart += 6;\r\n    }\r\n\r\n    // --- 确定字节序 (Endianness) ---\r\n    // MM (0x4D4D) = Big Endian\r\n    // II (0x4949) = Little Endian\r\n    const byteOrderMarker =\r\n      (fullFileBuffer[tiffStart] << 8) | fullFileBuffer[tiffStart + 1];\r\n    let isLittleEndian = false;\r\n\r\n    if (byteOrderMarker === 0x4949) {\r\n      isLittleEndian = true;\r\n    } else if (byteOrderMarker === 0x4d4d) {\r\n      isLittleEndian = false;\r\n    } else {\r\n      console.error(\"无法识别的 TIFF 头:\", byteOrderMarker.toString(16));\r\n      return undefined;\r\n    }\r\n\r\n    // 定义读取器\r\n    const readU16 = (offset: number) => {\r\n      const p = tiffStart + offset;\r\n      if (p + 2 > fullFileBuffer.length) return 0;\r\n      if (isLittleEndian) {\r\n        return fullFileBuffer[p] | (fullFileBuffer[p + 1] << 8);\r\n      } else {\r\n        return (fullFileBuffer[p] << 8) | fullFileBuffer[p + 1];\r\n      }\r\n    };\r\n\r\n    const readU32 = (offset: number) => {\r\n      const p = tiffStart + offset;\r\n      if (p + 4 > fullFileBuffer.length) return 0;\r\n      // 使用 >>> 0 确保是无符号整数\r\n      if (isLittleEndian) {\r\n        return (\r\n          (fullFileBuffer[p] |\r\n            (fullFileBuffer[p + 1] << 8) |\r\n            (fullFileBuffer[p + 2] << 16) |\r\n            (fullFileBuffer[p + 3] << 24)) >>>\r\n          0\r\n        );\r\n      } else {\r\n        return (\r\n          ((fullFileBuffer[p] << 24) |\r\n            (fullFileBuffer[p + 1] << 16) |\r\n            (fullFileBuffer[p + 2] << 8) |\r\n            fullFileBuffer[p + 3]) >>>\r\n          0\r\n        );\r\n      }\r\n    };\r\n\r\n    // 2. 读取第一个 IFD 的偏移量 (Header 之后的 4 字节)\r\n    const firstIFDOffset = readU32(4);\r\n    if (firstIFDOffset === 0) return undefined;\r\n\r\n    // --- 查找 Tag 的通用函数 ---\r\n    const findTagInIFD = (ifdOffset: number, targetTagId: number) => {\r\n      const numEntries = readU16(ifdOffset);\r\n\r\n      for (let i = 0; i < numEntries; i++) {\r\n        // 每个 Entry 12 字节\r\n        const entryOffset = ifdOffset + 2 + i * 12;\r\n        const tag = readU16(entryOffset);\r\n\r\n        if (tag === targetTagId) {\r\n          return {\r\n            type: readU16(entryOffset + 2),\r\n            count: readU32(entryOffset + 4),\r\n            // 注意：valueOffset 是存储“数据指针”或者“直接数据”的位置\r\n            valueOffsetOrData: entryOffset + 8,\r\n          };\r\n        }\r\n      }\r\n      return null;\r\n    };\r\n\r\n    // 3. 逻辑流程：0th IFD -> Exif SubIFD (0x8769) -> UserComment (0x9286)\r\n\r\n    // A. 在 0th IFD 找 ExifOffset\r\n    let targetIFDOffset = firstIFDOffset;\r\n    const exifPtrEntry = findTagInIFD(firstIFDOffset, 0x8769); // 0x8769 = ExifOffset\r\n\r\n    if (exifPtrEntry) {\r\n      // 读取指针指向的位置\r\n      targetIFDOffset = readU32(exifPtrEntry.valueOffsetOrData);\r\n    }\r\n\r\n    // B. 在目标 IFD (Exif IFD) 找 UserComment\r\n    const userCommentEntry = findTagInIFD(targetIFDOffset, 0x9286); // 0x9286 = UserComment\r\n\r\n    if (userCommentEntry) {\r\n      const { count, valueOffsetOrData } = userCommentEntry;\r\n\r\n      // 获取实际数据位置\r\n      // 规则：如果 count * unit_size > 4，则 valueOffsetOrData 存的是指针\r\n      // UserComment 类型是 7 (Undefined)，单位 1 字节。角色卡通常很大，所以一定是指针。\r\n      let rawDataOffset = readU32(valueOffsetOrData);\r\n\r\n      // 防御性编程：万一数据极短（<=4字节），虽然不可能存下有效角色卡\r\n      if (count <= 4) {\r\n        // 数据直接存在这 4 个字节里\r\n        // 但对于 UserComment 来说，这几乎不可能发生\r\n        rawDataOffset = valueOffsetOrData;\r\n      }\r\n\r\n      const absDataStart = tiffStart + rawDataOffset;\r\n      const rawData = fullFileBuffer.slice(absDataStart, absDataStart + count);\r\n\r\n      // 4. 解码数据 (处理 ASCII\\0\\0\\0 头)\r\n      const header = String.fromCharCode(...rawData.slice(0, 8));\r\n\r\n      if (header.startsWith(\"ASCII\\0\\0\\0\")) {\r\n        return new TextDecoder(\"utf-8\").decode(rawData.slice(8));\r\n      } else if (header.startsWith(\"UNICODE\\0\")) {\r\n        return new TextDecoder(\"utf-16\").decode(rawData.slice(8));\r\n      } else {\r\n        // 尝试直接解码（兼容没有 Header 的情况）\r\n        return new TextDecoder(\"utf-8\").decode(rawData);\r\n      }\r\n    }\r\n\r\n    return undefined;\r\n  }\r\n  export function parse_chunks(data: Uint8Array): WebPChunk[] {\r\n    const chunks: WebPChunk[] = [];\r\n\r\n    let offset = 12; // skip RIFF header (12 bytes)\r\n    const len = data.length;\r\n\r\n    while (offset + 8 <= len) {\r\n      const type = String.fromCharCode(\r\n        data[offset],\r\n        data[offset + 1],\r\n        data[offset + 2],\r\n        data[offset + 3]\r\n      );\r\n\r\n      const chunkLength =\r\n        data[offset + 4] |\r\n        (data[offset + 5] << 8) |\r\n        (data[offset + 6] << 16) |\r\n        (data[offset + 7] << 24);\r\n\r\n      const payloadStart = offset + 8;\r\n      const payloadEnd = payloadStart + chunkLength;\r\n\r\n      if (payloadEnd > len) break;\r\n\r\n      chunks.push({\r\n        type,\r\n        offset,\r\n        length: chunkLength,\r\n        preview: Array.from(data.slice(payloadStart, payloadStart + 16))\r\n          .map((b) => b.toString(16).padStart(2, \"0\"))\r\n          .join(\" \"),\r\n      });\r\n\r\n      // chunks are padded to even sizes\r\n      offset = payloadEnd + (chunkLength % 2);\r\n    }\r\n\r\n    return chunks;\r\n  }\r\n}\r\n","import { JPEG } from \"./jpeg\";\r\nimport { PNG } from \"./png\";\r\nimport { ParsedMetadata } from \"./types\";\r\nimport { WebP } from \"./webp\";\r\n\r\nexport function parseImageMetadata(\r\n  buffer: ArrayBuffer | Uint8Array\r\n): ParsedMetadata {\r\n  const data = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);\r\n\r\n  const isPng = data\r\n    .slice(0, 8)\r\n    .every((b, i) => b === [137, 80, 78, 71, 13, 10, 26, 10][i]);\r\n  const isJpeg = data[0] === 0xff && data[1] === 0xd8;\r\n  const isWebP =\r\n    String.fromCharCode(...data.slice(0, 4)) === \"RIFF\" &&\r\n    String.fromCharCode(...data.slice(8, 12)) === \"WEBP\";\r\n\r\n  if (isPng) {\r\n    return {\r\n      format: \"png\",\r\n      chunks: PNG.parse_chunks(data),\r\n    };\r\n  }\r\n\r\n  if (isJpeg) {\r\n    return {\r\n      format: \"jpeg\",\r\n      segments: JPEG.parse_chunks(data),\r\n    };\r\n  }\r\n\r\n  if (isWebP) {\r\n    return {\r\n      format: \"webp\",\r\n      chunks: WebP.parse_chunks(data),\r\n    };\r\n  }\r\n\r\n  throw new Error(\"Unsupported image format\");\r\n}\r\n","export namespace CharacterSpec {\r\n  export interface Root {\r\n    spec: string;\r\n    spec_version: string;\r\n    data: Data;\r\n    name: string;\r\n    description: string;\r\n    personality: string;\r\n    scenario: string;\r\n    first_mes: string;\r\n    mes_example: string;\r\n    creatorcomment: string;\r\n    avatar: string;\r\n    talkativeness: string;\r\n    fav: boolean;\r\n    tags: any[];\r\n    create_date: string;\r\n  }\r\n\r\n  export interface Data {\r\n    name: string;\r\n    description: string;\r\n    personality: string;\r\n    scenario: string;\r\n    first_mes: string;\r\n    mes_example: string;\r\n    creator_notes: string;\r\n    system_prompt: string;\r\n    post_history_instructions: string;\r\n    tags: string[];\r\n    creator: string;\r\n    character_version: string;\r\n    alternate_greetings: string[];\r\n    extensions: Extensions;\r\n    group_only_greetings: any[];\r\n    character_book: CharacterBook;\r\n  }\r\n\r\n  export interface Extensions {\r\n    talkativeness: string;\r\n    fav: boolean;\r\n    world: string;\r\n    depth_prompt: DepthPrompt;\r\n  }\r\n\r\n  export interface DepthPrompt {\r\n    prompt: string;\r\n    depth: number;\r\n    role: string;\r\n  }\r\n\r\n  export interface CharacterBook {\r\n    entries: Entry[];\r\n    name: string;\r\n    extensions: Record<string, any>;\r\n  }\r\n\r\n  export interface Entry {\r\n    id: number;\r\n    keys: string[];\r\n    secondary_keys: any[];\r\n    comment: string;\r\n    content: string;\r\n    constant: boolean;\r\n    selective: boolean;\r\n    insertion_order: number;\r\n    enabled: boolean;\r\n    position: \"before_char\" | \"after_char\";\r\n    use_regex: boolean;\r\n    extensions: Extensions2;\r\n  }\r\n\r\n  export interface Extensions2 {\r\n    position: number;\r\n    exclude_recursion: boolean;\r\n    display_index: number;\r\n    probability: number;\r\n    useProbability: boolean;\r\n    depth: number;\r\n    selectiveLogic: number;\r\n    group: string;\r\n    group_override: boolean;\r\n    group_weight: number;\r\n    prevent_recursion: boolean;\r\n    delay_until_recursion: boolean;\r\n    scan_depth: any;\r\n    match_whole_words: any;\r\n    use_group_scoring: boolean;\r\n    case_sensitive: any;\r\n    automation_id: string;\r\n    role: number;\r\n    vectorized: boolean;\r\n    sticky: number;\r\n    cooldown: number;\r\n    delay: number;\r\n    match_persona_description: boolean;\r\n    match_character_description: boolean;\r\n    match_character_personality: boolean;\r\n    match_character_depth_prompt: boolean;\r\n    match_scenario: boolean;\r\n    match_creator_notes: boolean;\r\n  }\r\n}\r\n\r\nexport type CharRawData = {\r\n  spec: string;\r\n  spec_version: string;\r\n  data: any;\r\n  [key: string]: any;\r\n};\r\n\r\nexport class CharacterCardParserError extends Error {}\r\n","import { CharacterBook } from \"./CharacterBook\";\nimport { parseImageMetadata } from \"./metadata/parser\";\nimport { SpecV1 } from \"./spec_types/spec_v1\";\nimport { SpecV2 } from \"./spec_types/spec_v2\";\nimport { SpecV3 } from \"./spec_types/spec_v3\";\nimport { CharacterCardParserError, CharRawData } from \"./types\";\nimport { ParsedMetadata } from \"./metadata/types\";\nimport { CharacterSpec } from \"./types\";\nimport {\n  Base64,\n  deepClone,\n  isValidImageUrl,\n  mergeObjects,\n  toBase64,\n} from \"./utils\";\nimport { WebP } from \"./metadata/webp\";\nimport { JPEG } from \"./metadata/jpeg\";\n\nexport class CharacterCard {\n  static async from_file(file: ArrayBuffer | Uint8Array) {\n    const exif_data = parseImageMetadata(file);\n    const image_b64: string = await toBase64(file);\n    const fallback_avatar = `data:image/${exif_data.format};base64,${image_b64}`;\n    const raw_data = this.parse_char_info(file, exif_data);\n    return new CharacterCard(\n      {\n        // default as v1\n        spec: \"chara_card_v1\",\n        spec_version: \"1.0\",\n        data: {},\n        ...raw_data,\n      },\n      fallback_avatar\n    );\n  }\n\n  static from_json(raw_data: CharRawData, fallback_avatar = \"\") {\n    return new CharacterCard(raw_data, fallback_avatar);\n  }\n\n  static parse_char_info(file: ArrayBuffer | Uint8Array, exif: ParsedMetadata) {\n    let encoded_text: string | undefined;\n\n    // NOTE: About CCV3 keyword checkout this\n    // https://github.com/kwaroran/character-card-spec-v3/blob/f3a86af019fbd99f788f7a1155f399655b34ab35/SPEC_V3.md?plain=1#L22-L30\n    if (exif.format === \"png\") {\n      const v1or2_keys = [\"chara\", \"character_card\"];\n      const encoded_ccv_1_2 = exif.chunks.find((x) =>\n        v1or2_keys.some((y) => x.keyword?.toLowerCase() === y.toLowerCase())\n      );\n      const encoded_ccv_3 = exif.chunks.find((x) => x.keyword === \"ccv3\");\n\n      encoded_text = encoded_ccv_3?.text ?? encoded_ccv_1_2?.text;\n    } else if (exif.format === \"jpeg\") {\n      const exif_chunk = exif.segments.find((x) => x.type === \"EXIF\");\n      const exif_text = JPEG.extract_user_comment(\n        file instanceof Uint8Array ? file : new Uint8Array(file),\n        exif_chunk\n      );\n      encoded_text = exif_text;\n    } else if (exif.format === \"webp\") {\n      const exif_chunk = exif.chunks.find((x) => x.type === \"EXIF\");\n      if (exif_chunk) {\n        const exif_data = WebP.extract_user_comment(\n          file instanceof Uint8Array ? file : new Uint8Array(file),\n          exif_chunk\n        );\n        encoded_text = exif_data;\n      }\n    }\n\n    if (!encoded_text) {\n      throw new CharacterCardParserError(\n        \"Failed to extract chara card data from image\"\n      );\n    }\n\n    const json_str = Base64.decode(encoded_text);\n    const json = JSON.parse(json_str);\n    return json;\n  }\n\n  constructor(readonly raw_data: CharRawData, readonly fallback_avatar = \"\") {}\n\n  async get_avatar(without_fallback = false): Promise<string> {\n    const fallback = without_fallback ? \"\" : this.fallback_avatar;\n    return [this.raw_data.avatar, this.raw_data.data?.avatar, fallback].filter(\n      isValidImageUrl\n    )[0];\n  }\n\n  get avatar(): CharacterSpec.Root[\"avatar\"] {\n    return [\n      this.raw_data.avatar,\n      this.raw_data.data?.avatar,\n      this.fallback_avatar,\n    ].filter(isValidImageUrl)[0];\n  }\n\n  get spec(): CharacterSpec.Root[\"spec\"] {\n    return this.raw_data.spec || \"unknown\";\n  }\n\n  get spec_version(): CharacterSpec.Root[\"spec_version\"] {\n    return this.raw_data.spec_version || \"unknown\";\n  }\n\n  get name(): CharacterSpec.Data[\"name\"] {\n    switch (this.spec) {\n      case \"chara_card_v2\":\n        return this.raw_data.data?.name ?? this.raw_data.name;\n      case \"chara_card_v3\":\n        return this.raw_data.data?.name ?? this.raw_data.name;\n      default:\n        return this.raw_data.char_name ?? this.raw_data.name ?? \"unknown\";\n    }\n  }\n\n  get description(): CharacterSpec.Data[\"description\"] {\n    switch (this.spec) {\n      case \"chara_card_v2\":\n        return this.raw_data.data?.description ?? this.raw_data.description;\n      case \"chara_card_v3\":\n        return this.raw_data.data?.description ?? this.raw_data.description;\n      default:\n        return this.raw_data.description ?? \"unknown\";\n    }\n  }\n\n  get first_message(): CharacterSpec.Data[\"first_mes\"] {\n    switch (this.spec) {\n      case \"chara_card_v2\":\n        return this.raw_data.data?.first_mes ?? this.raw_data.first_mes;\n      case \"chara_card_v3\":\n        return this.raw_data.data?.first_mes ?? this.raw_data.first_mes;\n      default:\n        return this.raw_data.first_mes ?? \"unknown\";\n    }\n  }\n\n  get message_example(): CharacterSpec.Root[\"mes_example\"] {\n    switch (this.spec) {\n      case \"chara_card_v2\":\n        return this.raw_data.data?.mes_example ?? this.raw_data.mes_example;\n      case \"chara_card_v3\":\n        return this.raw_data.data?.mes_example ?? this.raw_data.mes_example;\n      default:\n        return this.raw_data.mes_example ?? \"unknown\";\n    }\n  }\n\n  get create_date(): CharacterSpec.Root[\"create_date\"] {\n    switch (this.spec) {\n      case \"chara_card_v2\":\n        return this.raw_data.data?.create_date ?? this.raw_data.create_date;\n      case \"chara_card_v3\":\n        return this.raw_data.data?.create_date ?? this.raw_data.create_date;\n      default:\n        return this.raw_data.create_date ?? \"unknown\";\n    }\n  }\n\n  get personality(): CharacterSpec.Data[\"personality\"] {\n    switch (this.spec) {\n      case \"chara_card_v2\":\n        return this.raw_data.data?.personality ?? this.raw_data.personality;\n      case \"chara_card_v3\":\n        return this.raw_data.data?.personality ?? this.raw_data.personality;\n      default:\n        return this.raw_data.personality ?? \"unknown\";\n    }\n  }\n\n  get scenario(): CharacterSpec.Data[\"scenario\"] {\n    switch (this.spec) {\n      case \"chara_card_v2\":\n        return this.raw_data.data?.scenario ?? this.raw_data.scenario;\n      case \"chara_card_v3\":\n        return this.raw_data.data?.scenario ?? this.raw_data.scenario;\n      default:\n        return this.raw_data.scenario ?? \"unknown\";\n    }\n  }\n\n  get alternate_greetings(): CharacterSpec.Data[\"alternate_greetings\"] {\n    switch (this.spec) {\n      case \"chara_card_v2\":\n        return this.raw_data.data?.alternate_greetings;\n      case \"chara_card_v3\":\n        return this.raw_data.data?.alternate_greetings;\n      default:\n        return [];\n    }\n  }\n\n  get character_book(): CharacterSpec.CharacterBook {\n    switch (this.spec) {\n      case \"chara_card_v2\":\n        return this.raw_data.data?.character_book;\n      case \"chara_card_v3\":\n        return this.raw_data.data?.character_book;\n      default:\n        return {\n          entries: [],\n          name: this.name,\n          extensions: {},\n        };\n    }\n  }\n\n  get tags(): CharacterSpec.Data[\"tags\"] {\n    switch (this.spec) {\n      case \"chara_card_v2\":\n        return this.raw_data.data?.tags;\n      case \"chara_card_v3\":\n        return this.raw_data.data?.tags;\n      default:\n        return [];\n    }\n  }\n\n  /**\n   * Converts the current character card data to the SpecV1 format.\n   *\n   * This method constructs a SpecV1.TavernCard object by extracting the necessary\n   * fields from the current instance's raw data using a getter function. The function\n   * retrieves data from multiple sources, including instance properties, the raw data\n   * object, and its nested data object. The resulting object contains fields defined\n   * in the chara_card_v1 specification, such as name, description, personality, scenario,\n   * first message, and example messages.\n   *\n   * @returns A SpecV1.TavernCard object representing the character card data in SpecV1 format.\n   */\n\n  public toSpecV1(): SpecV1.TavernCard {\n    const getter = (key: string) =>\n      (this as any)[key] ?? this.raw_data[key] ?? this.raw_data.data?.[key];\n    return {\n      name: getter(\"name\") ?? getter(\"char_name\"),\n      description: getter(\"description\"),\n      personality: getter(\"personality\"),\n      scenario: getter(\"scenario\"),\n      first_mes: getter(\"first_mes\"),\n      mes_example: getter(\"mes_example\"),\n    };\n  }\n\n  /**\n   * Converts the current character card data to the SpecV2 format.\n   *\n   * This method constructs a SpecV2.TavernCardV2 object by extracting the necessary\n   * fields from the current instance's raw data using a getter function. The function\n   * retrieves data from multiple sources, including instance properties, the raw data\n   * object, and its nested data object. The resulting object contains fields defined\n   * in the chara_card_v2 specification, including additional fields introduced in\n   * later updates.\n   *\n   * @returns A deep-cloned SpecV2.TavernCardV2 object representing the character card\n   *          data in SpecV2 format.\n   */\n\n  public toSpecV2(): SpecV2.TavernCardV2 {\n    const getter = (key: string) =>\n      (this as any)[key] ?? this.raw_data[key] ?? this.raw_data.data?.[key];\n    return deepClone({\n      spec: \"chara_card_v2\",\n      spec_version: \"2.0\",\n      data: {\n        // fields from CCV2\n        name: getter(\"name\") ?? getter(\"char_name\"),\n        description: getter(\"description\"),\n        mes_example: getter(\"mes_example\"),\n        first_mes: getter(\"first_mes\"),\n        personality: getter(\"personality\"),\n        scenario: getter(\"scenario\"),\n        // New fields start here\n        creator_notes: getter(\"creator_notes\"),\n        system_prompt: getter(\"system_prompt\"),\n        post_history_instructions: getter(\"post_history_instructions\"),\n        alternate_greetings: getter(\"alternate_greetings\"),\n        character_book: getter(\"character_book\"),\n        // May 8th additions\n        tags: getter(\"tags\"),\n        creator: getter(\"creator\"),\n        character_version: getter(\"character_version\"),\n        extensions: getter(\"extensions\"),\n      },\n    });\n  }\n\n  /**\n   * Converts the current character card data to the SpecV3 format.\n   *\n   * This function utilizes a getter to retrieve properties from the\n   * character card's raw data and returns a deep-cloned object\n   * conforming to the SpecV3.CharacterCardV3 structure. It includes\n   * fields from the CCV2 specification, changes specific to CCV3,\n   * and new fields introduced in CCV3.\n   *\n   * @returns A deep-cloned object representing the character card data\n   * in SpecV3 format.\n   */\n\n  public toSpecV3(): SpecV3.CharacterCardV3 {\n    const getter = (key: string) =>\n      (this as any)[key] ?? this.raw_data[key] ?? this.raw_data.data?.[key];\n    return deepClone({\n      spec: \"chara_card_v3\",\n      spec_version: \"3.0\",\n      data: {\n        // fields from CCV2\n        name: getter(\"name\") ?? getter(\"char_name\"),\n        description: getter(\"description\"),\n        tags: getter(\"tags\"),\n        creator: getter(\"creator\"),\n        character_version: getter(\"character_version\"),\n        mes_example: getter(\"mes_example\"),\n        extensions: getter(\"extensions\"),\n        system_prompt: getter(\"system_prompt\"),\n        post_history_instructions: getter(\"post_history_instructions\"),\n        first_mes: getter(\"first_mes\"),\n        alternate_greetings: getter(\"alternate_greetings\"),\n        personality: getter(\"personality\"),\n        scenario: getter(\"scenario\"),\n        //Changes from CCV2\n        creator_notes: getter(\"creator_notes\"),\n        character_book: getter(\"character_book\"),\n        //New fields in CCV3\n        assets: getter(\"assets\"),\n        nickname: getter(\"nickname\"),\n        creator_notes_multilingual: getter(\"creator_notes_multilingual\"),\n        source: getter(\"source\"),\n        group_only_greetings: getter(\"group_only_greetings\"),\n        creation_date: getter(\"create_date\") ?? getter(\"creation_date\"),\n        modification_date: getter(\"modify_date\") ?? getter(\"modification_date\"),\n      },\n    });\n  }\n\n  /**\n   *  Returns the maximum compatible version of the character card\n   *\n   *  this card => merge(v1,v2,v3);\n   */\n  public toMaxCompatibleSpec():\n    | SpecV3.CharacterCardV3\n    | SpecV2.TavernCardV2\n    | SpecV1.TavernCard {\n    return mergeObjects(this.toSpecV1(), this.toSpecV2(), this.toSpecV3());\n  }\n\n  /**\n   * Creates a clone of the current CharacterCard instance in the specified version format.\n   *\n   * This method generates a new CharacterCard object with the data formatted to match\n   * the specified version's specification. It supports conversion to SpecV1, SpecV2, and\n   * SpecV3 formats by utilizing the respective `toSpecV1`, `toSpecV2`, and `toSpecV3` methods.\n   *\n   * @param version - The specification version (\"v1\", \"v2\", or \"v3\") to clone the character card into.\n   *                  Defaults to \"v3\" if not specified.\n   *\n   * @returns A new CharacterCard instance formatted according to the specified version.\n   *\n   * @throws Will throw an error if the specified version is unsupported.\n   */\n\n  public clone(version = \"v3\" as \"v1\" | \"v2\" | \"v3\") {\n    let new_raw_data: any = null;\n    switch (version) {\n      case \"v1\": {\n        new_raw_data = this.toSpecV1();\n        break;\n      }\n      case \"v2\": {\n        new_raw_data = this.toSpecV2();\n        break;\n      }\n      case \"v3\": {\n        new_raw_data = this.toSpecV3();\n        break;\n      }\n      default: {\n        throw new Error(`Unsupported version ${version}`);\n      }\n    }\n    return CharacterCard.from_json({\n      spec: \"chara_card_v1\",\n      spec_version: \"1.0\",\n      data: {},\n      ...new_raw_data,\n    });\n  }\n\n  public get_book() {\n    return CharacterBook.from_json(this.raw_data);\n  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