57 lines
1.7 KiB
JavaScript
57 lines
1.7 KiB
JavaScript
// # Has Helper
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// Usage: `{{#has tag="video, music"}}`, `{{#has author="sam, pat"}}`
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//
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// Checks if a post has a particular property
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var _ = require('lodash'),
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errors = require('../errors'),
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has;
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has = function (options) {
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options = options || {};
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options.hash = options.hash || {};
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var tags = _.pluck(this.tags, 'name'),
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author = this.author ? this.author.name : null,
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tagList = options.hash.tag || false,
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authorList = options.hash.author || false,
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tagsOk,
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authorOk;
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function evaluateTagList(expr, tags) {
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return expr.split(',').map(function (v) {
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return v.trim();
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}).reduce(function (p, c) {
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return p || (_.findIndex(tags, function (item) {
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// Escape regex special characters
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item = item.replace(/[\-\/\\\^$*+?.()|\[\]{}]/g, '\\$&');
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item = new RegExp('^' + item + '$', 'i');
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return item.test(c);
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}) !== -1);
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}, false);
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}
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function evaluateAuthorList(expr, author) {
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var authorList = expr.split(',').map(function (v) {
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return v.trim().toLocaleLowerCase();
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});
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return _.contains(authorList, author.toLocaleLowerCase());
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}
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if (!tagList && !authorList) {
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errors.logWarn('Invalid or no attribute given to has helper');
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return;
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}
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tagsOk = tagList && evaluateTagList(tagList, tags) || false;
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authorOk = authorList && evaluateAuthorList(authorList, author) || false;
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if (tagsOk || authorOk) {
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return options.fn(this);
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}
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return options.inverse(this);
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};
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module.exports = has;
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