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index.js
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index.js
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'use strict';
const ms = require('ms');
const randomInt = (min, max) =>
Math.floor(Math.random() * (max - min + 1) + min);
const formatTime = (m) => (typeof m === 'string' ? ms(m) : m);
const formatParam = (min, max, option) => {
let time, endTime;
if (typeof max === 'object') {
option = max;
} else if (max) {
endTime = max;
}
if (Array.isArray(min)) {
endTime = min[1];
time = min[0];
} else {
time = min;
}
time = formatTime(time);
if (endTime) {
time = randomInt(time, formatTime(endTime));
}
return [time, option];
};
const createAbortError = () => {
const error = new Error('Randelay aborted');
error.name = 'AbortError';
return error;
};
const createRandelay = ({
clearTimeout: defaultClear,
setTimeout: set,
willResolve,
}) => (time, endTime, option = {}) => {
const [delayTime, opt] = formatParam(time, endTime, option);
const { value, signal } = opt;
if (signal && signal.aborted) {
return Promise.reject(createAbortError());
}
let timeoutId;
let settle;
let rejectFn;
const clear = defaultClear || clearTimeout;
const signalListener = () => {
clear(timeoutId);
rejectFn(createAbortError());
};
const cleanup = () => {
if (signal) {
signal.removeEventListener('abort', signalListener);
}
};
const randelayPromise = new Promise((resolve, reject) => {
settle = () => {
cleanup();
if (willResolve) {
resolve(value);
} else {
reject(value);
}
};
rejectFn = reject;
timeoutId = (set || setTimeout)(settle, delayTime);
});
if (signal) {
signal.addEventListener('abort', signalListener, { once: true });
}
randelayPromise.clear = () => {
clear(timeoutId);
timeoutId = null;
settle();
};
return randelayPromise;
};
const randelay = createRandelay({ willResolve: true });
randelay.reject = createRandelay({ willResolve: false });
randelay.createWithTimers = ({ clearTimeout, setTimeout }) => {
const randelay = createRandelay({
clearTimeout,
setTimeout,
willResolve: true,
});
randelay.reject = createRandelay({
clearTimeout,
setTimeout,
willResolve: false,
});
return randelay;
};
module.exports = randelay;
// TODO: Remove this for the next major release
module.exports.default = randelay;