'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;
};