1 | 'use strict';
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2 |
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3 | exports.isInteger = num => {
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4 | if (typeof num === 'number') {
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5 | return Number.isInteger(num);
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6 | }
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7 | if (typeof num === 'string' && num.trim() !== '') {
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8 | return Number.isInteger(Number(num));
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9 | }
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10 | return false;
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11 | };
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12 |
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13 | /**
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14 | * Find a node of the given type
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15 | */
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16 |
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17 | exports.find = (node, type) => node.nodes.find(node => node.type === type);
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18 |
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19 | /**
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20 | * Find a node of the given type
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21 | */
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22 |
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23 | exports.exceedsLimit = (min, max, step = 1, limit) => {
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24 | if (limit === false) return false;
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25 | if (!exports.isInteger(min) || !exports.isInteger(max)) return false;
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26 | return ((Number(max) - Number(min)) / Number(step)) >= limit;
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27 | };
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28 |
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29 | /**
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30 | * Escape the given node with '\\' before node.value
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31 | */
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32 |
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33 | exports.escapeNode = (block, n = 0, type) => {
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34 | let node = block.nodes[n];
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35 | if (!node) return;
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36 |
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37 | if ((type && node.type === type) || node.type === 'open' || node.type === 'close') {
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38 | if (node.escaped !== true) {
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39 | node.value = '\\' + node.value;
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40 | node.escaped = true;
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41 | }
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42 | }
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43 | };
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44 |
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45 | /**
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46 | * Returns true if the given brace node should be enclosed in literal braces
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47 | */
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48 |
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49 | exports.encloseBrace = node => {
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50 | if (node.type !== 'brace') return false;
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51 | if ((node.commas >> 0 + node.ranges >> 0) === 0) {
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52 | node.invalid = true;
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53 | return true;
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54 | }
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55 | return false;
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56 | };
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57 |
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58 | /**
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59 | * Returns true if a brace node is invalid.
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60 | */
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61 |
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62 | exports.isInvalidBrace = block => {
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63 | if (block.type !== 'brace') return false;
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64 | if (block.invalid === true || block.dollar) return true;
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65 | if ((block.commas >> 0 + block.ranges >> 0) === 0) {
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66 | block.invalid = true;
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67 | return true;
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68 | }
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69 | if (block.open !== true || block.close !== true) {
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70 | block.invalid = true;
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71 | return true;
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72 | }
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73 | return false;
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74 | };
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75 |
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76 | /**
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77 | * Returns true if a node is an open or close node
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78 | */
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79 |
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80 | exports.isOpenOrClose = node => {
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81 | if (node.type === 'open' || node.type === 'close') {
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82 | return true;
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83 | }
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84 | return node.open === true || node.close === true;
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85 | };
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86 |
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87 | /**
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88 | * Reduce an array of text nodes.
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89 | */
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90 |
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91 | exports.reduce = nodes => nodes.reduce((acc, node) => {
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92 | if (node.type === 'text') acc.push(node.value);
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93 | if (node.type === 'range') node.type = 'text';
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94 | return acc;
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95 | }, []);
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96 |
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97 | /**
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98 | * Flatten an array
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99 | */
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100 |
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101 | exports.flatten = (...args) => {
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102 | const result = [];
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103 | const flat = arr => {
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104 | for (let i = 0; i < arr.length; i++) {
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105 | let ele = arr[i];
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106 | Array.isArray(ele) ? flat(ele, result) : ele !== void 0 && result.push(ele);
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107 | }
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108 | return result;
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109 | };
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110 | flat(args);
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111 | return result;
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112 | };
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