feat: add query and fix bugs

src/query/query-upload/utils/to-file.ts

@@ -0,0 +1,105 @@
+const getFileExtension = (filename: string) => {
+  return filename.split('.').pop();
+};
+const getFileType = (extension: string) => {
+  switch (extension) {
+    case 'js':
+      return 'text/javascript';
+    case 'css':
+      return 'text/css';
+    case 'html':
+      return 'text/html';
+    case 'json':
+      return 'application/json';
+    case 'png':
+      return 'image/png';
+    case 'jpg':
+      return 'image/jpeg';
+    case 'jpeg':
+      return 'image/jpeg';
+    case 'gif':
+      return 'image/gif';
+    case 'svg':
+      return 'image/svg+xml';
+    case 'webp':
+      return 'image/webp';
+    case 'ico':
+      return 'image/x-icon';
+    default:
+      return 'text/plain';
+  }
+};
+const checkIsBase64 = (content: string) => {
+  return content.startsWith('data:');
+};
+/**
+ * 获取文件的目录和文件名
+ * @param filename 文件名
+ * @returns 目录和文件名
+ */
+export const getDirectoryAndName = (filename: string) => {
+  if (!filename) {
+    return null;
+  }
+  if (filename.startsWith('.')) {
+    return null;
+  } else {
+    filename = filename.replace(/^\/+/, ''); // Remove all leading slashes
+  }
+  const hasDirectory = filename.includes('/');
+  if (!hasDirectory) {
+    return { directory: '', name: filename };
+  }
+  const parts = filename.split('/');
+  const name = parts.pop()!; // Get the last part as the file name
+  const directory = parts.join('/'); // Join the remaining parts as the directory
+  return { directory, name };
+};
+/**
+ * 把字符串转为文件流，并返回文件流，根据filename的扩展名，自动设置文件类型.
+ * 当不是文本类型，自动需要把base64的字符串转为blob
+ * @param content 字符串
+ * @param filename 文件名
+ * @returns 文件流
+ */
+export const toFile = (content: string, filename: string) => {
+  // 如果文件名是 a/d/a.js 格式的，则需要把d作为目录，a.js作为文件名
+  const directoryAndName = getDirectoryAndName(filename);
+  if (!directoryAndName) {
+    throw new Error('Invalid filename');
+  }
+  const { name } = directoryAndName;
+  const extension = getFileExtension(name);
+  if (!extension) {
+    throw new Error('Invalid filename');
+  }
+  const isBase64 = checkIsBase64(content);
+  const type = getFileType(extension);
+
+  if (isBase64) {
+    // Decode base64 string
+    const base64Data = content.split(',')[1]; // Remove the data URL prefix
+    const byteCharacters = atob(base64Data);
+    const byteNumbers = new Array(byteCharacters.length);
+    for (let i = 0; i < byteCharacters.length; i++) {
+      byteNumbers[i] = byteCharacters.charCodeAt(i);
+    }
+    const byteArray = new Uint8Array(byteNumbers);
+    const blob = new Blob([byteArray], { type });
+    return new File([blob], filename, { type });
+  } else {
+    const blob = new Blob([content], { type });
+    return new File([blob], filename, { type });
+  }
+};
+
+/**
+ * 把字符串转为文本文件
+ * @param content 字符串
+ * @param filename 文件名
+ * @returns 文件流
+ */
+export const toTextFile = (content: string = 'keep directory exist', filename: string = 'keep.txt') => {
+  const file = toFile(content, filename);
+  return file;
+};