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90 lines
3.1 KiB
JavaScript
90 lines
3.1 KiB
JavaScript
/**
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Template helper definitions for Handlebars.
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@license MIT. Copyright (c) 2015 James Devlin / FluentDesk.
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@module handlebars-helpers.js
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*/
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(function() {
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var HANDLEBARS = require('handlebars')
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, MD = require('marked')
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, H2W = require('../utils/html-to-wpml')
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, moment = require('moment')
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, _ = require('underscore');
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/**
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Register useful Handlebars helpers.
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@method registerHelpers
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*/
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module.exports = function() {
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// Set up a date formatting helper so we can do:
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// {{formatDate val 'YYYY-MM'}}
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HANDLEBARS.registerHelper("formatDate", function(datetime, format) {
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return moment ? moment( datetime ).format( format ) : datetime;
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});
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// Set up a Markdown-to-WordProcessingML helper so we can do:
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// {{wmpl val [true|false]}}
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HANDLEBARS.registerHelper("wpml", function( txt, inline ) {
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if(!txt) return '';
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inline = (inline && !inline.hash) || false;
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txt = inline ?
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MD(txt.trim()).replace(/^\s*<p>|<\/p>\s*$/gi, '') :
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MD(txt.trim());
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txt = H2W( txt.trim() );
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return txt;
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});
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// Set up a last-word helper so we can do:
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// {{lastWord val [true|false]}}
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HANDLEBARS.registerHelper("lastWord", function( txt ) {
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return txt && txt.trim() ? _.last( txt.split(' ') ) : '';
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});
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// Set up a Markdown-to-WordProcessingML helper so we can do:
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// {{initialWords val [true|false]}}
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HANDLEBARS.registerHelper("initialWords", function( txt ) {
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return txt && txt.trim() ? _.initial( txt.split(' ') ).join(' ') : '';
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});
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// Set up a URL-trimming helper to drop the protocol so we can do:
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// {{trimURL url}}
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HANDLEBARS.registerHelper("trimURL", function( url ) {
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return url && url.trim() ? url.trim().replace(/^https?:\/\//i, '') : '';
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});
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// Set up a Markdown-to-WordProcessingML helper so we can do:
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// {{either A B}}
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HANDLEBARS.registerHelper("either", function( lhs, rhs, options ) {
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if (lhs || rhs) return options.fn(this);
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});
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// Set up a generic conditional helper so we can do:
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// {{compare val otherVal operator="<"}}
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// http://doginthehat.com.au/2012/02/comparison-block-helper-for-handlebars-templates/
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HANDLEBARS.registerHelper('compare', function(lvalue, rvalue, options) {
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if (arguments.length < 3)
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throw new Error("Handlerbars Helper 'compare' needs 2 parameters");
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var operator = options.hash.operator || "==";
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var operators = {
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'==': function(l,r) { return l == r; },
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'===': function(l,r) { return l === r; },
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'!=': function(l,r) { return l != r; },
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'<': function(l,r) { return l < r; },
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'>': function(l,r) { return l > r; },
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'<=': function(l,r) { return l <= r; },
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'>=': function(l,r) { return l >= r; },
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'typeof': function(l,r) { return typeof l == r; }
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};
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if (!operators[operator])
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throw new Error("Handlerbars Helper 'compare' doesn't know the operator "+operator);
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var result = operators[operator](lvalue,rvalue);
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return result ? options.fn(this) : options.inverse(this);
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});
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};
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}());
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