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