Class YvluPlugin

yvlu/yvlu.ts:502–1444

    if (isWebmFormat(imageBuffer)) {
      return { width: 512, height: 512 };
    }

    // WebP文件格式解析
    if (imageBuffer.length < 30) {
      throw new Error("Invalid WebP file: too short");
    }

    // 检查RIFF头
    if (imageBuffer.toString("ascii", 0, 4) !== "RIFF") {
      throw new Error("Invalid WebP file: missing RIFF header");
    }

    // 检查WEBP标识
    if (imageBuffer.toString("ascii", 8, 12) !== "WEBP") {
      throw new Error("Invalid WebP file: missing WEBP signature");
    }

    // 读取VP8或VP8L头
    const chunkHeader = imageBuffer.toString("ascii", 12, 16);

    if (chunkHeader === "VP8 ") {
      // VP8格式
      const width = imageBuffer.readUInt16LE(26) & 0x3fff;
      const height = imageBuffer.readUInt16LE(28) & 0x3fff;
      return { width, height };
    } else if (chunkHeader === "VP8L") {
      // VP8L格式
      const data = imageBuffer.readUInt32LE(21);
      const width = (data & 0x3fff) + 1;
      const height = ((data >> 14) & 0x3fff) + 1;
      return { width, height };
    } else if (chunkHeader === "VP8X") {
      // VP8X格式
      const width = (imageBuffer.readUInt32LE(24) & 0xffffff) + 1;
      const height = (imageBuffer.readUInt32LE(27) & 0xffffff) + 1;
      return { width, height };
    }

    // 如果无法解析，返回默认尺寸
    console.warn("Unknown WebP format, using default dimensions");
    return { width: 512, height: 768 };
  } catch (error) {
    console.warn("Failed to parse WebP dimensions:", error);
    return { width: 512, height: 768 };
  }
}

const codeTag = (text: string): string => `<code>${htmlEscape(text)}</code>`;

const getPeerNumericId = (peer?: Api.TypePeer): number | undefined => {
  if (!peer) return undefined;
  if (peer instanceof Api.PeerUser) return peer.userId;
  if (peer instanceof Api.PeerChat) return -peer.chatId;
  if (peer instanceof Api.PeerChannel) return -peer.channelId;
  return undefined;
};

const resolveForwardSenderFromHeader = async (