pedwfrontend/pages/api/file/uploadsinglefile.js

import {
    createBlob,
    createRepBlob,
    uploadSingleFile,
} from "../../../actions/azurestorage";

import nextConnect from "next-connect";
import middleware from "../middleware/middleware";
import { consoleLogger } from "../../../actions";
import { fileTypeFromBuffer } from "file-type";
import fs from "fs";
import path from "path";

const ApiProxy = nextConnect();
ApiProxy.use(middleware);

ApiProxy.post(async (req, res) => {
    var checkHash = req.query.hash;
    // console.log(JSON.stringify(req.body));
    // console.log(JSON.stringify(req.body.appealData));
    // console.log(req.files);

    const containerID = req.body.containerID[0];
    const casefolderID = req.body.casefolderID[0];

    console.log("there are files:", Object.keys(req.files).length);

    // Add other mimetypes here
    const allowedMimeTypes = [
        "application/pdf",
        "application/msword",
        "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
        "image/tiff",
        "image/jpeg",
        "application/zip",
        "image/png",
        "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
    ];

    var allowedFilesFormData = {};
    var invalidFiles = []; // To store the names of invalid files

    // for (const [fileName, fileDetails] of Object.entries(req.files)) {
    //     if (allowedMimeTypes.includes(fileDetails[0].headers["content-type"])) {
    //         allowedFilesFormData[fileName] = fileDetails.map((file) => ({
    //             fieldName: file.fieldName,
    //             originalFilename: file.originalFilename,
    //             path: file.path,
    //             size: file.size,
    //             headers: file.headers,
    //             contentType: file.headers["content-type"],
    //         }));
    //     }
    // }

    for (const [fileName, fileDetails] of Object.entries(req.files)) {
        const file = fileDetails[0];
        const filePath = file.path;

        // Check the MIME type from file headers
        const fileMimeType = file.headers["content-type"];
        if (allowedMimeTypes.includes(fileMimeType)) {
            // Check file signature (magic number) using file-type
            const buffer = fs.readFileSync(filePath);

            try {
                const type = await fileTypeFromBuffer(buffer); // Correct usage of fileTypeFromBuffer
                console.log("checking mime type ", type);
                if (type && allowedMimeTypes.includes(type.mime)) {
                    // If the MIME type from the file signature matches the allowed list
                    allowedFilesFormData[fileName] = fileDetails.map(
                        (file) => ({
                            fieldName: file.fieldName,
                            originalFilename: file.originalFilename,
                            path: file.path,
                            size: file.size,
                            headers: file.headers,
                            contentType: fileMimeType,
                        })
                    );
                } else {
                    console.log(
                        `\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n\nFile ${fileName} has an invalid MIME type based on its content.\n\n\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`
                    );
                    invalidFiles.push(fileName); // Track invalid file

                    // return res
                    //     .status(400)
                    //     .json({ error: `Invalid file type for ${fileName}` });
                }
            } catch (error) {
                console.log(
                    `Error reading file ${fileName} for MIME type validation`,
                    error
                );
                // return res
                //     .status(500)
                //     .json({ error: "Failed to validate file type" });
            }
        } else {
            console.log(
                `\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n\nFile ${fileName} has an unsupported MIME type: ${fileMimeType}\n\n\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`
            );
            invalidFiles.push(fileName); // Track invalid file

            // return res.status(400).json({
            //     error: `Unsupported MIME type for ${fileName}`,
            // });
        }
    }
    //console.log("allowedFilesFormData: ", allowedFilesFormData);

    // If no valid files are found
    // if (Object.keys(allowedFilesFormData).length === 0) {
    //     return res.status(400).json({
    //         error: "No valid files found",
    //         invalidFiles: invalidFiles, // Return the list of invalid files
    //     });
    // }

    invalidFiles = invalidFiles.map((fileName) => {
        return `${fileName} - Invalid file`;
    });

    try {
        const data = await uploadSingleFile(
            allowedFilesFormData,
            containerID,
            casefolderID
        ).then((data) => {
            return res.status(200).json({ data, invalidFiles });
        });
        return res.status(200).json({ data, invalidFiles });
    } catch (error) {
        consoleLogger(error);
        return res.status(500).json({ error: "Failed to upload files" });
    }
});

export const config = {
    api: {
        bodyParser: false,
    },
};

export default ApiProxy;