mcopy/src/sequencer/index.ts

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'use strict';
import { v4 as uuid } from 'uuid';
import Log = require('log');
import { powerSaveBlocker } from 'electron'
/** @module lib/sequencer **/
let seq : Sequencer;
class Sequencer {
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private running : boolean = false;
private paused : boolean = false;
private grid : any[] = [];
private gridLoops : number = 1;
private arr : any[] = []; //store sequence from gui
private loops : number = 1;
private cfg : any;
private cmd : any;
private CMDS : any = {};
private ipc : any;
private ui : any;
private log : any;
private id : string = 'sequence';
private alerted : boolean = false;
private psbId : any;
/**
* @constructor
* Create a new sequencer and assign command and UI as private sub-classes
*
* @param {object} cfg Configuration object
* @param {object} cmd Shared command class
* @param {object} ui Electron UI, browser window
**/
constructor (cfg : any, cmd : any, ui : any) {
this.cfg = cfg;
this.cmd = cmd;
this.ui = ui;
this.cmds(cfg.cmd);
this.init();
}
/**
* Take configuration object and assign all commands as keys
* in the internal CMDS object.
*
* @param {object} obj Configuration object
**/
private cmds (obj : any) {
let keys : string[] = Object.keys(obj);
for (let key of keys) {
this.CMDS[obj[key]] = key;
}
//
//
}
/**
* Initialize the class by requiring ipcMain from electron
* and creating logger.
*
**/
private async init () {
this.log = await Log({ label : this.id })
this.ipc = require('electron').ipcMain;
this.listen();
}
/**
* Bind ipc listener to channel 'sequencer' or current id of
* class.
**/
private listen () {
this.ipc.on(this.id, this.listener.bind(this));
}
/**
* Listener callback function. Called whenever ipc
* message is sent to channel 'sequencer'.
*
* @param {object} event IPC message event
* @param {object} arg Arguments provided in message
**/
private async listener (event : any, arg : any) {
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if (arg && arg.start) {
this.start(arg);
} else if (arg && arg.stop) {
this.stop();
} else if (arg && arg.pause) {
this.pause();
} else if (arg && arg.set) {
this.setSteps(arg.set);
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} else if (arg && arg.unset) {
this.unsetSteps(arg.unset);
} else if (arg && arg.loops) {
this.setLoops(arg.loops);
}
event.returnValue = true;
}
/**
* Sets the value of the loops in the grid sequence
* to value sent by UI in ipc message.
*
* @param {integer} count Number of loops to set grid sequence to
**/
public setLoops (count : number) {
this.gridLoops = count;
this.log.info(`Set loop count to ${count}`);
}
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/**
* Sets multiple steps at once
*
* @param {array} steps Array of steps to set or update
**/
public setSteps (steps : any[]) {
for (let step of steps) {
this.grid[step.x] = step;
}
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}
/**
* Resets multiple steps to default 'undefined' state
*
* @param {array} steps Array containing the x location of steps to unset
**/
public unsetSteps (steps : number[]) {
for (let x of steps) {
this.grid[x] = undefined;
}
}
/**
* Starts a sequence with the existing grid sequence,
* or if one is provided in the arg object, starts
* that sequence.
*
* @param {object} arg Arguments from ipc message
**/
public async start (arg : any) {
const psbId : number = powerSaveBlocker.start('prevent-display-sleep');
let startTime : number = +new Date();
let ms : number;
if (arg && arg.arr) {
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this.arr = arg.arr; //overwrite sequence
} else {
this.arr = this.grid;
}
if (arg && arg.loops) {
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this.loops = arg.loops; //overwrite loops
} else {
this.loops = this.gridLoops;
}
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this.running = true;
this.paused = false;
//start sequence
this.log.info(`Starting sequence...`);
this.ui.send(this.id, { start : true });
if (this.cmd.proj.filmout.state.enabled === true) {
await this.cmd.proj.filmout.display.open();
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}
for (let x = 0; x < this.loops; x++) {
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//start loop
this.log.info(`Starting loop ${x + 1}`);
this.ui.send(this.id, { loop : x, start : true });
for (let y = 0; y < this.arr.length; y++) {
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//start step
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if (!this.running) {
break;
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}
//UI initiates pause, not planned
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while (this.paused) {
await delay(42);
}
if (typeof this.arr[y] === 'undefined') {
continue;
}
this.log.info(`Starting step ${y + 1} of loop ${x + 1}`);
this.ui.send(this.id, { step : y, loop : x, start : true });
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await this.step(y);
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//end step
this.log.info(`Ended step ${y + 1} of loop ${x + 1}`);
this.ui.send(this.id, { step : y, loop : x, stop : true });
}
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if (!this.running) {
break;
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}
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//end loop
this.log.info(`Ended loop ${x + 1}`);
this.ui.send(this.id, { loop : x, stop : true });
}
if (this.cmd.proj.filmout.state.enabled === true) {
await this.cmd.proj.filmout.display.close();
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}
powerSaveBlocker.stop(psbId)
this.psbId = null
ms = ( +new Date() ) - startTime;
//end sequence
this.log.info(`Ended sequence`);
this.ui.send(this.id, { stop : true, ms });
}
/**
* Pauses sequence from UI.
**/
public pause () {
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this.paused = true;
}
/**
* Stops the sequence
**/
public stop () {
if (this.cmd.proj.filmout.state.enabled === true) {
this.cmd.proj.filmout.display.close();
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}
this.running = false;
if (this.psbId) {
powerSaveBlocker.stop(this.psbId);
}
//clear?
}
/**
* Execute command @ step x. Wrapper with try catch.
*
* @param {integer} x Step to execute command at
**/
private async step ( x: number) {
try {
await this.cmdExec(x)
} catch (err) {
throw err;
}
}
/**
* Locate step @ position x and execute the command.
*
* @param {integer} x Step to execute command at
**/
private async cmdExec (x : number) {
const cmdOriginal : string = this.arr[x].cmd;
const cmd : string = this.CMDS[cmdOriginal];
this.log.info(`CMD: '${cmdOriginal}' -> ${cmd}`);
//I wrote this when I was very tired and delirious
return await this.cmd[cmd]();
}
}
module.exports = function (cfg : any, cmd : any, ui : any) {
return new Sequencer(cfg, cmd, ui);
}