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listener.js
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'use strict';
var path = require('path');
var sanitize = require('./helpers/valueConversion');
var ListenerError = require('./helpers/UwotListenerError');
const STATUS_DISABLED = 'disabled';
const STATUS_ENABLED = 'enabled';
class UwotListener {
static get DEFAULT_UWOT_LISTENER_OPTIONS() {
return {
type: 'default',
parser: 'cmdParser',
parserPath: path.join(global.Uwot.Constants.appRoot, 'parser/defaultCmdParser.js'),
output: 'ansi',
outputPath: path.join(global.Uwot.Constants.appRoot, 'output/ansi.js'),
cmdPath: path.join(global.Uwot.Constants.appRoot, 'cmd.js'),
routeUriPath: '/bin', //path relative to /listeners or /path.........
cmdSet: global.Uwot.Constants.reserved
};
}
constructor(name, instanceSessionId, options) {
if ('string' !== typeof name) {
throw new TypeError('invalid name passed to UwotListener contstructor');
}
else if ('string' !== typeof instanceSessionId) {
throw new TypeError('invalid instanceSessionId passed to UwotListener contstructor');
}
else {
if ('object' !== typeof global.Uwot.Listeners) {
global.Uwot.Listeners = {};
}
if ('object' !== typeof global.Uwot.Listeners[instanceSessionId]) {
global.Uwot.Listeners[instanceSessionId] = {};
}
if ('object' === typeof global.Uwot.Listeners[instanceSessionId][name]) {
throw new Error('listener name "' + name + '" not unique for isid "' + instanceSessionId + '"');
}
else {
this.name = name;
this.isid = instanceSessionId;
if ('object' !== typeof options || null === options) {
options = Object.assign({}, UwotListener.DEFAULT_UWOT_LISTENER_OPTIONS);
}
this.type = 'string' === typeof options.type && -1 !== global.Uwot.Constants.listenerTypes.indexOf(options.type) ? options.type : UwotListener.DEFAULT_UWOT_LISTENER_OPTIONS.type;
if (this.type === 'default' && (this.name !== 'default' || 'object' === typeof global.Uwot.Listeners[instanceSessionId]['default'])) {
throw new Error('default listener already exists for isid "' + instanceSessionId + '"');
}
this.parser = 'string' === typeof options.parser && -1 !== global.Uwot.Constants.listenerParserTypes.indexOf(options.parser) ? options.parser : UwotListener.DEFAULT_UWOT_LISTENER_OPTIONS.parser;
this.parserPath = 'string' === typeof options.parserPath ? sanitize.cleanString(options.parserPath) : UwotListener.DEFAULT_UWOT_LISTENER_OPTIONS.parserPath;
this.output = 'string' === typeof options.output && -1 !== global.Uwot.Constants.listenerOutputTypes.indexOf(options.output) ? options.output : UwotListener.DEFAULT_UWOT_LISTENER_OPTIONS.output;
this.outputPath = 'string' === typeof options.outputPath ? sanitize.cleanString(options.outputPath) : UwotListener.DEFAULT_UWOT_LISTENER_OPTIONS.outputPath;
this.cmdPath = 'string' === typeof options.cmdPath ? sanitize.cleanString(options.cmdPath) : UwotListener.DEFAULT_UWOT_LISTENER_OPTIONS.cmdPath;
this.routeUriPath = 'string' === typeof options.routeUriPath ? sanitize.cleanString(options.routeUriPath) : UwotListener.DEFAULT_UWOT_LISTENER_OPTIONS.routeUriPath;
this.cmdSet = 'object' === typeof options.cmdSet && Array.isArray(options.cmdSet) ? options.cmdSet : UwotListener.DEFAULT_UWOT_LISTENER_OPTIONS.cmdSet;
if ('additional' === this.type) {
// TBD
// verify that each cmdSet entry is unique from global.Uwot.Constants.reserved
// set parser, output, and router to defaults, as additional listeners can only perform custom logic for commands, not custom parsing or output
}
this.cmdFile = require(this.cmdPath);
switch(this.parser) {
case 'internal':
this.parserFunction = this.cmdFile[this.parserPath];
break;
case 'external':
default:
this.parserFunction = require(this.parserPath);
}
switch(this.output) {
case 'internal':
this.outputFunction = this.cmdFile[this.outputPath];
break;
case 'external':
default:
this.outputFunction = require(this.outputPath);
}
if ('default' === this.type) {
this.status = STATUS_ENABLED;
}
else {
this.status = STATUS_DISABLED;
}
}
}
}
handler(args) {
var self = this;
if (self.status !== STATUS_ENABLED) {
return Promise.resolve(null);
}
else {
return new Promise((resolve, reject) => {
if ('string' !== typeof args.cmd) {
return reject(new ListenerError('', {type: 'CMDINV', isid: self.isid, lname: self.name}));
}
else {
args.cmd = sanitize.cleanString(args.cmd, 1024, '');
}
if ('function' !== typeof args.app || null === args.app) {
return reject(new ListenerError('', {type: 'APPINV', isid: self.isid, lname: self.name}));
}
if ('boolean' !== typeof args.isAuthenticated || !args.isAuthenticated) {
args.isAuthenticated = false;
}
args.userId = sanitize.cleanString(args.userId, 255);
args.isid = 'string' === typeof args.isid && '' !== args.isid ? sanitize.cleanString(args.isid) : this.isid;
args.cmdSet = self.cmdSet;
self.parserFunction(args, function(error, parsedObj) {
if (error) {
return reject(error);
}
else {
parsedObj.outputHandler = (outputObj) => {
return new Promise((resolve, reject) => {
if ('object' !== typeof outputObj || null === outputObj) {
return resolve(self.outputFunction(''));
}
else {
try {
return resolve(self.outputFunction(outputObj));
}
catch(e) {
return reject(e);
}
}
});
};
return resolve(parsedObj);
}
});
});
}
}
enable() {
if ('default' !== this.type && 'cmdParser' === this.parser) {
this.cmdSet.forEach((cmd) => {
if ('string' === typeof cmd && -1 === global.Uwot.Constants.reserved.indexOf(cmd)) {
global.Uwot.Bin[cmd] = {
name: cmd,
execute: (args, opts, app, user, callback, isSudo, isid) => {
if ('function' !== typeof callback) {
throw new TypeError('invalid callback passed to listener for ' + cmd);
}
else {
return this.cmdFile.handler(cmd, args, opts, app, user, callback, isSudo, isid);
}
}
};
}
});
}
this.status = STATUS_ENABLED;
return this.status;
}
disable() {
if ('default' !== this.type && 'cmdParser' === this.parser) {
this.cmdSet.forEach((cmd) => {
if ('string' === typeof cmd && -1 === global.Uwot.Constants.reserved.indexOf(cmd)) {
delete global.Uwot.Bin[cmd];
}
});
}
this.status = STATUS_DISABLED;
return this.status;
}
}
module.exports = UwotListener;