intval3/lib/sequence/index.js

'use strict';
const uuid = require('uuid').v4;
const log = require('../log')('seq');
/** Object sequence features */
const sequence = {};
sequence._state = {
    arr: [],
    active: false,
    paused: false,
    frame: false,
    delay: false,
    count: 0,
    stop: null
};
sequence._loop = {
    arr: [],
    count: 0,
    max: 0
};
sequence.start = function (options, cb) {
    if (sequence._state.active) {
        return false;
    }
    sequence._state.active = true;
    sequence._state.count = 0;
    if (options.arr) {
        sequence._state.arr = options.arr;
    }
    if (options.loop) {
        sequence._loop.arr = options.loop;
        sequence._loop.count = 0;
    }
    if (options.maxLoop) {
        sequence._loop.max = options.maxLoop;
    }
    else {
        sequence._loop.max = 0;
    }
    sequence._state.stop = cb;
    sequence.step();
    sequence._state.id = uuid();
    return sequence._state.id;
};
sequence.setStop = function () {
    sequence._state.active = false;
};
sequence.stop = function () {
    sequence._state.active = false;
    sequence._state.count = 0;
    sequence._state.arr = [];
    sequence._loop.count = 0;
    sequence._loop.max = 0;
    sequence._loop.arr = [];
    if (sequence._state.stop)
        sequence._state.stop();
    sequence._state.stop = null;
};
sequence.pause = function () {
    sequence._state.paused = true;
};
sequence.resume = function () {
    sequence._state.paused = false;
    sequence.step();
};
sequence.step = function () {
    if (sequence._state.active && !sequence._state.paused) {
        if (sequence._state.arr.length > 0) {
            if (sequence._state.count > sequence._state.arr.length - 1) {
                return sequence.stop();
            }
            log.info('step', { count: sequence._state.count, id: sequence._state.id });
            return sequence._state.arr[sequence._state.count](() => {
                sequence._state.count++;
                sequence.step();
            });
        }
        else if (sequence._loop.arr.length > 0) {
            if (sequence._state.count > sequence._loop.arr.length - 1) {
                sequence._state.count = 0;
                sequence._loop.count++;
            }
            if (sequence._loop.max > 0 && sequence._loop.count > sequence._loop.max) {
                return sequence.stop();
            }
            log.info('step', { count: sequence._state.count, id: sequence._state.id });
            return sequence._loop.arr[sequence._state.count](() => {
                sequence._state.count++;
                sequence.step();
            });
        }
        else {
            return sequence.stop();
        }
    }
    else if (sequence._state.paused) {
        log.info('step', 'Sequence paused', { loop: sequence._loop.count, count: sequence._state.count });
    }
    else if (!sequence._state.active) {
        log.info('step', 'Sequence stopped', { loop: sequence._loop.count, count: sequence._state.count });
    }
};
module.exports = sequence;
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