Trigger Jenkins execution remotely.js

/**************************************************************
**********ENVIRONMENT HEALTH CHECK SAMPLE SCRIPT *************
**************************************************************
This script will connect to Jenkins using Basic Authentication and trigger the execution of a Job using API' requests. It will then copy the log file from Jenkins to the execution log in Plutora

The script accepts the input parameters below, triggers the execution of a Jenkins job and captures the console output in Plutora.

The paramaters entered into the UI need to be named as follows and are case sensitive:
- host = <This is the url of your instance of Jenkins>
- user = <This is the user to authenticate with Jenkins>
- password = <This is the password to authenticate with Jenkins>
- token = <This is the build authentication token configured under build triggers of the selected job>
- jobName = <This is the name of build job>
- buildWithParamaters = <true or false>

The outcome of your test should return the result via a Promise.Resolve();
    resolve('Online');  Sets the environment health status to 'Online'
    resolve('Offline'); Sets the environment health status to 'Offline'
    resolve('Issue');   Sets the environment health status to 'Issue'
    resolve('Unknown'); Sets the environment health status to 'Unknown'
        
Any thrown errors during script execution or a call to Reject will be treated as a result of Unknown
    reject(true); Sets the environment health status to 'Unknown'
*/
/********************************************************
 *************STEP 1: Import npm's************************
 ********************************************************/
const https = require("https");
const http = require("http");

/********************************************************
 *******STEP 2: Define you API and SSH parameters*********
 ********************************************************/

//EXAMPLE SETTINGS
let options = {
    host: '',
    port: 80,
    path: '',
    method: 'GET',
    headers: {
        accept: 'application/json',
        authorization:''
    }
};

/********************************************************
 ****STEP 3: Create an API Request function********
 ********************************************************/
let req = function (options) {
    return new Promise((resolve, reject) => {
        http.get(options, (resp) => {
            let data = '';
            // A chunk of data has been recieved.
            resp.on('data', (chunk) => {
                data += chunk;
            });
            resp.on('end', () => {
                try {
                    resolve(JSON.parse(data));
                }
                catch (error) {
                    resolve(data);
                }
            });
        }).on("error", (err) => {
            console.log("Error: " + err.message);
            reject(err.message);
        });
    });
}

/********************************************************
 ********STEP 4: Define the main run function ************
 ********************************************************/
let run = function (args) {
    return new Promise((resolve, reject) => {

        //Resolve credentials from paramaters set via Plutora UI.
        options.headers.authorization = "Basic " + new Buffer(`${args.arguments.user}:${args.arguments.password}`).toString('base64');
		options.host = args.arguments.host;
		options.path = `/job/${args.arguments.jobName}/lastBuild/api/json`;
		options.jobName = args.arguments.jobName;
		let buildType = args.arguments.buildWithParamaters === 'true' ? 'buildWithParameters' : 'build';
		
        let number = 0;

        return req(options)
            .then((data) => {
                number = data.number + 1;
            })
            .then(() => {
                options.path = `/job/${options.jobName}/${buildType}?token=${args.arguments.token}`;
                return req(options)
            })
            .then(() => {
                options.path = `/job/${options.jobName}/${number}/api/json?tree=building,number,result,executor[progress]`;
                return pollProgress(number, 100)
            })
            .then(result => resolve(result))
            .catch(err => {
                console.log(err);
                reject(err)
            });
    })
};

/********************************************************
 ******* Optional: Define support functions *************
 ********************************************************/

const pollProgress = async (number, retries) => {
    return new Promise(async (resolve, reject) => {
        let attempts = 0;
        let isBuilding = true;
        let result;

        do {
            ++attempts;
            await sleep(5000);
            await req(options).then(data => {
                if (data.building || data === "") {
                    //notifier.progress('Building...' + (data.executor ? data.executor.progress : 0) + '%');
                    console.log('Execution in progress. Completed...' + (data.executor ? data.executor.progress : 0) + '%');
                } else if (data.building === false) {
                    isBuilding = false;
                    result = data.result;
                }
            }).catch(err => {
                isBuilding = false;
                return reject(err);
            });

        } while (attempts <= retries && isBuilding === true);

        if (!result) {
            console.log("Job not completed in time; Final progress unknown.");
            return resolve('Offline');
        }

        options.path = `/job/${options.jobName}/` + number + "/consoleText";
        return req(options).then((log) => {
            console.log("Build Number: " + number);
            console.log("Build Log: " + log);
            if (result === "SUCCESS") {
                return resolve('Online');
            } else {
                return resolve('Offline');
            }
        }, (err) => {
            return reject(console.log(err));
        });
    });
};

const sleep = (ms) => {
    return new Promise(resolve => setTimeout(resolve, ms));
};

/********************************************************
 ***************STEP 5: EXPORT RUN METHOD ***********************
 ********************************************************/
module.exports = {
    run: run
};