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utils.js
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utils.js
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/**
* Gets the attribute's indexes in the array of the attributes
* @param {Array} attrs
* @param {String} attr
* @returns {Array}
*/
function _getIndexesInArray(attrs, attr) {
const res = [];
for (let i = 0; i < attrs.length; i++) {
if (attrs[i].name === attr) res.push(i);
}
return res;
}
/**
* Sorts the attributes in alphabetical order
* @param {Array} attrs
* @returns {Array}
*/
export function sortAttrs(attrs) {
return attrs.sort(function(a, b) {
if (a.name < b.name) {
return -1;
}
if (a.name > b.name) {
return 1;
}
return 0;
});
}
/**
* Sorts values of the attribute 'class'
* @param {Array} attrs
* @returns {Array}
*/
export function sortCssClasses(attrs) {
/**
* Sorts the given CSS class attribute
* @param {String} cssClasses
* @returns {String}
*/
function _sortCssClassesValues(cssClasses) {
const classList = [...new Set((cssClasses || '').split(' ').filter(i => i))];
classList.sort();
return classList.join(' ');
}
const classIndexes = _getIndexesInArray(attrs, 'class');
classIndexes.forEach(function(index) {
attrs[index].value = _sortCssClassesValues(attrs[index].value);
});
return attrs;
}
/**
* Sorts values of attributes which have JSON format
* @param {Array} attrs
* @param {Array} compareAttributesAsJSON
* return {Array}
*/
export function sortAttrsValues(attrs, compareAttributesAsJSON) {
/**
* Recursively sorts the given object by key
* @param {Object} obj
* @returns {Object}
*/
function _sortObj(obj) {
if (obj === null || typeof obj !== 'object') {
return JSON.stringify(obj);
}
if (Array.isArray(obj)) {
return '[' + obj.map(_sortObj).join(',') + ']';
}
const keys = Object.keys(obj);
keys.sort();
return '{'
+ keys
.map(function(key) {
return JSON.stringify(key) + ':' + _sortObj(obj[key]);
})
.join(',')
+ '}';
}
/**
* Parses the given in HTML attribute JSON
* @param {String} val
* @param {Boolean} [isClick]
* @returns {Object}
*/
function _parseAttr(val, isClick) {
try {
if (isClick) {
// eslint-disable-next-line no-new-func
const fn = Function(val);
return fn ? fn() : {};
}
return JSON.parse(val);
} catch (err) {
return undefined;
}
}
compareAttributesAsJSON.forEach(function(attr) {
if (typeof attr === 'string') {
const name = attr;
attr = {};
attr.name = name;
attr.isFunction = false;
}
let attrValue;
const isFunction = (attr.isFunction);
const attrIndexes = _getIndexesInArray(attrs, attr.name);
attrIndexes.forEach(function(index) {
attrValue = _parseAttr(attrs[index].value, isFunction);
attrValue = _sortObj(attrValue);
attrs[index].value = (isFunction && attrValue ? 'return ' : '') + attrValue;
});
});
return attrs;
}
/**
* Replaces the values of attributes on an empty string
* @param {Array} attrs
* @param {Array} ignoreAttributes
* @returns {Array}
*/
export function removeAttrsValues(attrs, ignoreAttributes) {
ignoreAttributes.forEach(function(attr) {
const attrIndexes = _getIndexesInArray(attrs, attr);
attrIndexes.forEach(function(index) {
attrs[index].value = '';
});
});
return attrs;
}
/**
* Removes whitespaces from the text
* @param {String} text
* @returns {String}
*/
export function removeWhitespaces(text) {
return text
.replace(/[\n\r\t\v\f]+/g, ' ')
.replace(/\s+/g, ' ')
.trim();
}
/**
* Processes a conditional comment
* @param {String} comment
* @param {Function} modify
* @param {Object} options
* @returns {String|undefined}
*/
export async function getConditionalComment(comment, modify, options) {
const START_IF = '^\\s*\\[if .*\\]>';
const END_IF = '<!\\[endif\\]\\s*$';
const matchedStartIF = comment.match(new RegExp(START_IF));
const matchedEndIF = comment.match(new RegExp(END_IF));
if (comment.match(new RegExp(START_IF + '\\s*$')) || comment.match(new RegExp(START_IF + '<!\\s*$')) || comment.match(new RegExp('^' + END_IF))) {
return comment.trim();
}
if (matchedStartIF && matchedEndIF) {
const start = matchedStartIF[0];
const end = matchedEndIF[0];
const modified = await modify(comment.substring(start.length, matchedEndIF.index), options);
return (start + modified + end).trim();
}
}
export function htmlEntities(str) {
const map = {
'&': '&',
"'": ''',
'"': '"',
'<': '<',
'>': '>'
};
return str.replace(/[&"'<>]/g, function(c) {
return map[c];
});
}