Docker.Daemon.js

const Security = require('Security');
const { spawnSync } = require('child_process')

const Docker =
{
    Daemon:
    {
        Execute: (args, parsingCb) =>
        {
            args = Security.Array(Security.String)(args)
            Security.OptionalCallback(parsingCb)

            Docker.Daemon.Check()

            const { stdout, stderr, status } = spawnSync("docker", args, {shell: true})

            const stderrStr = stderr.toString()
            const stdoutStr = stdout.toString()

            if (status !== 0) {
                throw new Error(`An error has occurred whilst running docker command.\nSTDERR: "${stderrStr}"\n with arguments:\n${JSON.stringify(args)}`)
            }
            else if( parsingCb ) {
                return parsingCb(stdoutStr)
            }
            else {
                return stdoutStr
            }
        },

        /**
         * Checks that the Docker daemon is running
         *
         * @throws Error if the daemon is not running
         */
        Check: () =>
        {
            const { stdout, stderr, status } = spawnSync("docker", ['-v'], {shell: true})

            const stderrStr = stderr.toString()
            const stdoutStr = stdout.toString()

            if (status !== 0) {
                throw new Error(`An error has occurred whilst running docker command \n${stderrStr}'\n`)
            }
            else {
                let inputSplitByLines = Docker.Daemon.SplitOutput( stdoutStr )
                let filteredLines = inputSplitByLines.filter( line => line.includes("version") )
                if ( filteredLines.length===0 ) {
                    throw new Error("Docker is not installed on this machine")
                }
            }
        },

        SplitOutput: (outputProvided) =>
        {
            outputProvided = Security.String(outputProvided)

            const inputSplitByLines = outputProvided.split("\n")
            const inputCleaned = inputSplitByLines.filter( line => line!=="" )
            if (inputCleaned.length===0) {
                throw new Error("This command returned empty result")
            }
            return  inputCleaned;
        }
    }
}

module.exports = Docker.Daemon