Add baoyu-skills package

baoyu-skills/skills/baoyu-post-to-wechat/scripts/wechat-image-loader.ts

@@ -0,0 +1,82 @@
+import fs from "node:fs";
+import path from "node:path";
+import {
+  type WechatUploadAsset,
+  detectImageFormatFromBuffer,
+} from "./wechat-image-processor.ts";
+
+export type { WechatUploadAsset };
+
+const MIME_TYPES_BY_EXT: Record<string, string> = {
+  ".jpg": "image/jpeg",
+  ".jpeg": "image/jpeg",
+  ".png": "image/png",
+  ".gif": "image/gif",
+  ".webp": "image/webp",
+  ".bmp": "image/bmp",
+  ".tiff": "image/tiff",
+  ".tif": "image/tiff",
+  ".svg": "image/svg+xml",
+  ".ico": "image/x-icon",
+};
+
+export async function loadUploadAsset(
+  imagePath: string,
+  baseDir?: string,
+): Promise<WechatUploadAsset> {
+  let fileBuffer: Buffer;
+  let filename: string;
+  let contentType: string;
+  let fileSize = 0;
+  let fileExt = "";
+
+  if (imagePath.startsWith("http://") || imagePath.startsWith("https://")) {
+    const response = await fetch(imagePath);
+    if (!response.ok) {
+      throw new Error(`Failed to download image: ${imagePath}`);
+    }
+    const buffer = await response.arrayBuffer();
+    if (buffer.byteLength === 0) {
+      throw new Error(`Remote image is empty: ${imagePath}`);
+    }
+    fileBuffer = Buffer.from(buffer);
+    fileSize = buffer.byteLength;
+    const urlPath = imagePath.split("?")[0]!;
+    filename = path.basename(urlPath) || "image.jpg";
+    fileExt = path.extname(filename).toLowerCase();
+    contentType = response.headers.get("content-type") || "image/jpeg";
+  } else {
+    const resolvedPath = path.isAbsolute(imagePath)
+      ? imagePath
+      : path.resolve(baseDir || process.cwd(), imagePath);
+
+    if (!fs.existsSync(resolvedPath)) {
+      throw new Error(`Image not found: ${resolvedPath}`);
+    }
+    const stats = fs.statSync(resolvedPath);
+    if (stats.size === 0) {
+      throw new Error(`Local image is empty: ${resolvedPath}`);
+    }
+    fileSize = stats.size;
+    fileBuffer = fs.readFileSync(resolvedPath);
+    filename = path.basename(resolvedPath);
+    fileExt = path.extname(filename).toLowerCase();
+    contentType = MIME_TYPES_BY_EXT[fileExt] || "image/jpeg";
+  }
+
+  const detected = detectImageFormatFromBuffer(fileBuffer);
+  if (detected && detected.contentType !== contentType) {
+    console.error(`[wechat-api] Format mismatch: ${filename} declared as ${contentType}, actual ${detected.contentType}`);
+    contentType = detected.contentType;
+    fileExt = detected.fileExt;
+    filename = `${path.basename(filename, path.extname(filename))}${detected.fileExt}`;
+  }
+
+  return {
+    buffer: fileBuffer,
+    filename,
+    contentType,
+    fileExt,
+    fileSize,
+  };
+}