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extra.js
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extra.js
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'use strict '
var {
keywordType,
resolutionKeywords,
codecKeywords,
audioKeywords,
lowQualityReleaseKeywords,
highQualityReleaseKeywords,
allKeywords
} = require('./keywords')
// chars without escaping: [](). -;,_/\+
var separatorChars = '([\\[\\](). \\-;,_\\/\\\\+])'
// NOTE: Needs node ^8.10.0 V8 > 6.2 to work with lookbehind ?<=
var leftBoundary = '(^|(?<=' + separatorChars + '{1}))'
var rightBoundary = '((?=' + separatorChars + '{1})|$)'
var allKeywordsPattern = '(' + allKeywords.join('|') + ')'
var allKeywordsRegEx = new RegExp(leftBoundary + allKeywordsPattern + rightBoundary, 'gi')
var keywordsWithType = (function () {
var allKeywordsObj = {}
function addToAllKeywords(arr, type) {
return arr.forEach(element => {
allKeywordsObj[element] = type
})
}
addToAllKeywords(resolutionKeywords, keywordType.resolution)
addToAllKeywords(codecKeywords, keywordType.codec)
addToAllKeywords(audioKeywords, keywordType.audio)
addToAllKeywords(lowQualityReleaseKeywords, keywordType.lowQualitySrc)
addToAllKeywords(highQualityReleaseKeywords, keywordType.highQualitySrc)
return allKeywordsObj
}())
function pushUniqueToArray(arr, val) {
if (arr.indexOf(val) < 0) {
arr.push(val)
}
}
function getExtra(filePath) {
var extraData = { resolution: [], audio: [], codec: [], lowQualitySrc: [], highQualitySrc: [], }
if (!filePath
|| (typeof filePath !== 'string')) {
return extraData
}
var match = filePath.match(allKeywordsRegEx)
if (match)
match.reduce(function (extra, m) {
m = m.toLowerCase()
switch (keywordsWithType[m]) {
case keywordType.resolution:
pushUniqueToArray(extra.resolution, m)
break;
case keywordType.audio:
pushUniqueToArray(extra.audio, m)
break;
case keywordType.codec:
pushUniqueToArray(extra.codec, m)
break;
case keywordType.lowQualitySrc:
pushUniqueToArray(extra.lowQualitySrc, m)
break;
case keywordType.highQualitySrc:
pushUniqueToArray(extra.highQualitySrc, m)
break;
default:
break;
}
return extra
}, extraData)
return extraData
}
module.exports = {
getExtra: getExtra
}