Move next js project to archive (#207)

archive/next-js-web-app/src/config/cloudinary/CloudinaryStorage.ts

@@ -0,0 +1,95 @@
+/* eslint-disable no-underscore-dangle */
+
+import type { StorageEngine } from 'multer';
+import type { UploadApiOptions, UploadApiResponse, v2 as cloudinary } from 'cloudinary';
+import type { Request } from 'express';
+
+/**
+ * Represents a storage engine for uploading files to Cloudinary.
+ *
+ * @example
+ *   const storage = new CloudinaryStorage({
+ *     cloudinary,
+ *     params: {
+ *       folder: 'my-folder',
+ *       allowed_formats: ['jpg', 'png'],
+ *     },
+ *   });
+ */
+class CloudinaryStorage implements StorageEngine {
+  private cloudinary: typeof cloudinary;
+
+  private params: UploadApiOptions;
+
+  /**
+   * Creates an instance of CloudinaryStorage.
+   *
+   * @param options - The options for configuring the Cloudinary storage engine.
+   * @param options.cloudinary - The Cloudinary instance.
+   * @param options.params - The parameters for uploading files to Cloudinary.
+   */
+  constructor(options: { cloudinary: typeof cloudinary; params: UploadApiOptions }) {
+    this.cloudinary = options.cloudinary;
+    this.params = options.params;
+  }
+
+  /**
+   * Removes the file from Cloudinary.
+   *
+   * @param req - The request object.
+   * @param file - The file to be removed.
+   * @param callback - The callback function to be called if an error occurs.
+   */
+  _removeFile(req: Request, file: Express.Multer.File, callback: (error: Error) => void) {
+    this.cloudinary.uploader.destroy(file.filename, { invalidate: true }, callback);
+  }
+
+  /**
+   * Handles the file upload to Cloudinary.
+   *
+   * @param req - The request object.
+   * @param file - The file to be uploaded.
+   * @param callback - The callback function to be called after the file is uploaded.
+   */
+  _handleFile(
+    req: Request,
+    file: Express.Multer.File,
+    callback: (error?: unknown, info?: Partial<Express.Multer.File>) => void,
+  ) {
+    this.uploadFile(file)
+      .then((cloudResponse) => {
+        callback(null, {
+          path: cloudResponse.secure_url,
+          size: cloudResponse.bytes,
+          filename: cloudResponse.public_id,
+        });
+      })
+      .catch((error) => {
+        callback(error);
+      });
+  }
+
+  /**
+   * Uploads a file to Cloudinary.
+   *
+   * @param file - The file to be uploaded.
+   * @returns A promise that resolves to the upload response.
+   */
+  private uploadFile(file: Express.Multer.File): Promise<UploadApiResponse> {
+    return new Promise((resolve, reject) => {
+      const stream = this.cloudinary.uploader.upload_stream(
+        this.params,
+        (err, response) => {
+          if (err != null) {
+            return reject(err);
+          }
+          return resolve(response!);
+        },
+      );
+
+      file.stream.pipe(stream);
+    });
+  }
+}
+
+export default CloudinaryStorage;