luhn-generator
Version:
A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm
98 lines (84 loc) • 2.26 kB
JavaScript
function noAutoplayAudioEvaluate(node, options) {
/**
* if duration cannot be read, this means `preloadMedia` has failed
*/
if (!node.duration) {
console.warn(`axe.utils.preloadMedia did not load metadata`);
return undefined;
}
/**
* Compute playable duration and verify if it within allowed duration
*/
const { allowedDuration = 3 } = options;
const playableDuration = getPlayableDuration(node);
if (playableDuration <= allowedDuration && !node.hasAttribute('loop')) {
return true;
}
/**
* if media element does not provide controls mechanism
* -> fail
*/
if (!node.hasAttribute('controls')) {
return false;
}
return true;
/**
* Compute playback duration
* @param {HTMLMediaElement} elm media element
*/
function getPlayableDuration(elm) {
if (!elm.currentSrc) {
return 0;
}
const playbackRange = getPlaybackRange(elm.currentSrc);
if (!playbackRange) {
return Math.abs(elm.duration - (elm.currentTime || 0));
}
if (playbackRange.length === 1) {
return Math.abs(elm.duration - playbackRange[0]);
}
return Math.abs(playbackRange[1] - playbackRange[0]);
}
/**
* Get playback range from a media elements source, if specified
* See - https://developer.mozilla.org/de/docs/Web/HTML/Using_HTML5_audio_and_video#Specifying_playback_range
*
* Eg:
* src='....someMedia.mp3#t=8'
* -> should yeild [8]
* src='....someMedia.mp3#t=10,12'
* -> should yeild [10,12]
* @param {String} src media src
* @returns {Array|undefined}
*/
function getPlaybackRange(src) {
const match = src.match(/#t=(.*)/);
if (!match) {
return;
}
const [, value] = match;
const ranges = value.split(',');
return ranges.map(range => {
// range is denoted in HH:MM:SS -> convert to seconds
if (/:/.test(range)) {
return convertHourMinSecToSeconds(range);
}
return parseFloat(range);
});
}
/**
* Add HH, MM, SS to seconds
* @param {String} hhMmSs time expressed in HH:MM:SS
*/
function convertHourMinSecToSeconds(hhMmSs) {
let parts = hhMmSs.split(':');
let secs = 0;
let mins = 1;
while (parts.length > 0) {
secs += mins * parseInt(parts.pop(), 10);
mins *= 60;
}
return parseFloat(secs);
}
}
export default noAutoplayAudioEvaluate;