This method is attached to a server-side inversify service that retrieves a list of executable's depending on the provided parameters. It returns a list of those executables (after parsing them) to the called. This snippet makes use of several string methods (split, pop, replace) as well as array methods (filter, forEach).

getModuleVersions.ts

public async getModuleVersions(modulePrefix: string): Promise<any> {
    try {
        let fileExtension: string;
        let moduleLocation: string;

        switch (modulePrefix) {
            case 'module1':
                fileExtension = 'exe';
                moduleLocation = '';
                break;
            case 'module2':
                fileExtension = 'exe';
                moduleLocation = '';
                break;
            case 'module3':
                fileExtension = 'exe';
                moduleLocation = '';
                break;
            case 'module4':
                fileExtension = 'dll';
                moduleLocation = '';
                break;
            default:
                fileExtension = 'file';
                moduleLocation = '';
                break;
        }

        const options = { prefix: `modules/${modulePrefix}/` };
        const [files]: Array<any> = await storage
            .bucket(process.env.GOOGLE_STORAGE_ASSETS_BUCKET_NAME)
            .getFiles(options);
        const versions: Array<any> = [];
        files
            .filter(file => file.metadata.name.includes(fileExtension))
            .forEach(file => {
                let md5Hex: string;
                try {
                    md5Hex = Buffer.from(file.metadata.md5Hash, 'base64').toString('hex');
                } catch {
                    md5Hex = 'unable-to-parse';
                }
                const stringVersion = file.metadata.name
                    .split('/')
                    .pop()
                    .replace(`.${fileExtension}`, '');
                const numberVersion = parseInt(stringVersion.replace(/\./g, ''), 10);
                versions.push({
                    modulePrefix: modulePrefix,
                    stringVersion: stringVersion,
                    numberVerion: numberVersion,
                    filename: file.metadata.name,
                    moduleName: `${moduleLocation}${modulePrefix}.${fileExtension}`,
                    md5: md5Hex,
                    url: `https://filestore.com/${file.metadata.name}`
                });
            });

        return versions;
    } catch (e) {
        console.log(e);
    }
}