123 lines
2.5 KiB
JavaScript
123 lines
2.5 KiB
JavaScript
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'use strict';
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exports.isInteger = num => {
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if (typeof num === 'number') {
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return Number.isInteger(num);
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}
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if (typeof num === 'string' && num.trim() !== '') {
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return Number.isInteger(Number(num));
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}
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return false;
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};
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/**
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* Find a node of the given type
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*/
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exports.find = (node, type) => node.nodes.find(node => node.type === type);
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/**
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* Find a node of the given type
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*/
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exports.exceedsLimit = (min, max, step = 1, limit) => {
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if (limit === false) return false;
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if (!exports.isInteger(min) || !exports.isInteger(max)) return false;
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return ((Number(max) - Number(min)) / Number(step)) >= limit;
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};
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/**
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* Escape the given node with '\\' before node.value
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*/
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exports.escapeNode = (block, n = 0, type) => {
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const node = block.nodes[n];
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if (!node) return;
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if ((type && node.type === type) || node.type === 'open' || node.type === 'close') {
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if (node.escaped !== true) {
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node.value = '\\' + node.value;
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node.escaped = true;
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}
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}
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};
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/**
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* Returns true if the given brace node should be enclosed in literal braces
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*/
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exports.encloseBrace = node => {
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if (node.type !== 'brace') return false;
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if ((node.commas >> 0 + node.ranges >> 0) === 0) {
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node.invalid = true;
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return true;
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}
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return false;
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};
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/**
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* Returns true if a brace node is invalid.
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*/
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exports.isInvalidBrace = block => {
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if (block.type !== 'brace') return false;
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if (block.invalid === true || block.dollar) return true;
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if ((block.commas >> 0 + block.ranges >> 0) === 0) {
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block.invalid = true;
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return true;
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}
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if (block.open !== true || block.close !== true) {
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block.invalid = true;
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return true;
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}
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return false;
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};
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/**
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* Returns true if a node is an open or close node
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*/
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exports.isOpenOrClose = node => {
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if (node.type === 'open' || node.type === 'close') {
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return true;
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}
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return node.open === true || node.close === true;
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};
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/**
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* Reduce an array of text nodes.
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*/
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exports.reduce = nodes => nodes.reduce((acc, node) => {
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if (node.type === 'text') acc.push(node.value);
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if (node.type === 'range') node.type = 'text';
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return acc;
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}, []);
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/**
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* Flatten an array
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*/
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exports.flatten = (...args) => {
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const result = [];
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const flat = arr => {
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for (let i = 0; i < arr.length; i++) {
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const ele = arr[i];
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if (Array.isArray(ele)) {
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flat(ele);
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continue;
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}
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if (ele !== undefined) {
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result.push(ele);
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}
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}
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return result;
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};
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flat(args);
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return result;
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};
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