@overwolf/ow-electron/checksum-validator.js

Build cross platform desktop apps with JavaScript, HTML, and CSS

const fs = require('fs');
const path = require('path');
const crypto = require('crypto');

function calculateFileHash(filePath) {
    return new Promise((resolve, reject) => {
        const hash = crypto.createHash('sha256');
        const stream = fs.createReadStream(filePath);

        stream.on('error', err => reject(err));
        stream.on('data', chunk => hash.update(chunk));
        stream.on('end', () => resolve(hash.digest('hex')));
    });
}

async function validateChecksums(folderPath) {
    try {
        // Read checksums.json from current directory
        const checksumPath = path.join(process.cwd(), 'checksums.json');
        const checksums = JSON.parse(fs.readFileSync(checksumPath, 'utf8'));
        let hasUpdates = false;

        // Check each file
        for (const [fileName, expectedHash] of Object.entries(checksums)) {
            const filePath = path.join(folderPath, fileName);

            if (fs.existsSync(filePath)) {
                const actualHash = await calculateFileHash(filePath);
                const matches = actualHash === expectedHash;
                if (!matches) {
                    console.log(`Actual hash: ${actualHash}`);
                    console.log(`File: ${fileName}`);
                    console.log(`Expected hash: ${expectedHash}`);
                    console.log(`Match: ${matches}`);
                  // Update checksums.json if hashes don't match
                    console.log('Updating checksums.json with new hash...');
                    checksums[fileName] = actualHash;
                    hasUpdates = true;
                } else {
                    console.log(`File: ${fileName} match`);
                }
            } else {
                console.log(`File: ${fileName} not found in specified directory`);
            }
        }

        // Write updated checksums back to file if there were any changes
        if (hasUpdates) {
            fs.writeFileSync(
                checksumPath, 
                JSON.stringify(checksums, null, 2), // Pretty print with 2 spaces
                'utf8'
            );
            console.log('\nChecksums.json has been updated with new hashes.');
        } else {
            console.log('\nNo updates were necessary.');
        }

    } catch (error) {
        console.error('Error:', error.message);
    }
}

// Check if folder path is provided as command line argument
const folderPath = process.argv[2];
if (!folderPath) {
    console.error('Please provide a folder path as an argument');
    console.error('Usage: node checksum-validator.js <folder-path>');
    process.exit(1);
}

validateChecksums(folderPath);