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1
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const min = require('./min.js'); |
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2
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const max = require('./max.js'); |
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3
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4
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class Match { |
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5
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constructor(find, operator) { |
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6
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this.find = find; |
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7
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this.operator = operator || null; |
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8
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} |
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9
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10
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check(value) { |
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11
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if (Array.isArray(this.find)) { |
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12
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return this.checkOperators(value, this.find.indexOf(value) < 0); |
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13
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} |
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14
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15
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return this.checkOperators(value, value != this.find); |
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16
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} |
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18
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checkOperators(value, find) { |
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const maxValue = max(this.find); |
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20
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const minValue = min(this.find); |
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21
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22
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const notOperator = find && (this.operator === '!=' || this.operator === '<>'); |
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23
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const noInput = !find && !this.operator; |
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24
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const gtOperator = ((value > maxValue && maxValue !== null) || value > this.find) && this.operator === '>'; |
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25
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const gltOperator = ((value >= maxValue && maxValue !== null) || value >= this.find) && this.operator === '>='; |
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26
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const ltOperator = ((value < minValue && minValue !== null) || value < this.find) && this.operator === '<'; |
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27
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const lltOperator = ((value <= minValue && minValue !== null) || value <= this.find) && this.operator === '<='; |
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28
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29
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return notOperator || noInput || gtOperator || gltOperator || ltOperator || lltOperator; |
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30
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} |
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31
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32
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static create(original, key, find, operator) { |
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33
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const matcher = new Match(find, operator); |
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34
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35
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return original.filter((item) => { |
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36
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let values = item[key]; |
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37
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38
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if (!values) { |
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39
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return false; |
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40
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} |
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41
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42
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values = values.toString().split(','); |
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43
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44
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return values.some(matcher.check.bind(matcher)); |
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45
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}); |
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46
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} |
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47
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} |
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48
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49
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module.exports = function multifilter(original, key, find, operator) { |
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50
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return Match.create(original, key, find, operator); |
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}; |
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52
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w3nl /
array-helpers
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The loose comparison such as
==or!=might produce some weird results for some values, unless you explicitly want to have this behavior here, better use the strict alternative.Learn more about loose comparison in Javascript.