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Refactor helpers.

Helpers shouldn't be specific to a given template engine (eg,
Handlebars) in order to allow sharing of helpers between different
template engines. Isolate abstract helpers in another module and apply
them via Handlebars.registerHelper and as necessary for other template
engines.
This commit is contained in:
hacksalot
2015-12-20 18:24:28 -05:00
parent 93456b5f40
commit b92cf7298a
3 changed files with 152 additions and 105 deletions

View File

@ -8,116 +8,17 @@ Template helper definitions for Handlebars.
(function() {
var HANDLEBARS = require('handlebars')
, MD = require('marked')
, H2W = require('../utils/html-to-wpml')
, moment = require('moment')
, _ = require('underscore');
, _ = require('underscore')
, helpers = require('./generic-helpers');
/**
Register useful Handlebars helpers.
@method registerHelpers
*/
module.exports = function() {
module.exports = function( theme ) {
// Set up a date formatting helper so we can do:
// {{formatDate val 'YYYY-MM'}}
HANDLEBARS.registerHelper("formatDate", function(datetime, format) {
return moment ? moment( datetime ).format( format ) : datetime;
});
// Set up a Markdown-to-WordProcessingML helper so we can do:
// {{wmpl val [true|false]}}
HANDLEBARS.registerHelper("wpml", function( txt, inline ) {
if(!txt) return '';
inline = (inline && !inline.hash) || false;
txt = inline ?
MD(txt.trim()).replace(/^\s*<p>|<\/p>\s*$/gi, '') :
MD(txt.trim());
txt = H2W( txt.trim() );
return txt;
});
// Set up a last-word helper so we can do:
// {{lastWord val [true|false]}}
HANDLEBARS.registerHelper("link", function( text, url ) {
return url && url.trim() ?
('<a href="' + url + '">' + text + '</a>') : text;
});
// Set up a last-word helper so we can do:
// {{lastWord val [true|false]}}
HANDLEBARS.registerHelper("lastWord", function( txt ) {
return txt && txt.trim() ? _.last( txt.split(' ') ) : '';
});
// Set up a skill colorizing helper:
// {{skillColor val}}
HANDLEBARS.registerHelper("skillColor", function( lvl ) {
switch(lvl) {
case 'beginner': return '#5CB85C';
case 'intermediate': return '#F1C40F';
case 'advanced': return '#428BCA';
case 'master': return '#C00000';
}
});
// Set up a skill colorizing helper:
// {{skillColor val}}
HANDLEBARS.registerHelper("skillHeight", function( lvl ) {
switch(lvl) {
case 'beginner': return '30';
case 'intermediate': return '16';
case 'advanced': return '8';
case 'master': return '0';
}
});
// Set up a Markdown-to-WordProcessingML helper so we can do:
// {{initialWords val [true|false]}}
HANDLEBARS.registerHelper("initialWords", function( txt ) {
return txt && txt.trim() ? _.initial( txt.split(' ') ).join(' ') : '';
});
// Set up a URL-trimming helper to drop the protocol so we can do:
// {{trimURL url}}
HANDLEBARS.registerHelper("trimURL", function( url ) {
return url && url.trim() ? url.trim().replace(/^https?:\/\//i, '') : '';
});
// Set up a URL-trimming helper to drop the protocol so we can do:
// {{trimURL url}}
HANDLEBARS.registerHelper("toLower", function( txt ) {
return txt && txt.trim() ? txt.toLowerCase() : '';
});
// Set up a Markdown-to-WordProcessingML helper so we can do:
// {{either A B}}
HANDLEBARS.registerHelper("either", function( lhs, rhs, options ) {
if (lhs || rhs) return options.fn(this);
});
// Set up a generic conditional helper so we can do:
// {{compare val otherVal operator="<"}}
// http://doginthehat.com.au/2012/02/comparison-block-helper-for-handlebars-templates/
HANDLEBARS.registerHelper('compare', function(lvalue, rvalue, options) {
if (arguments.length < 3)
throw new Error("Handlerbars Helper 'compare' needs 2 parameters");
var operator = options.hash.operator || "==";
var operators = {
'==': function(l,r) { return l == r; },
'===': function(l,r) { return l === r; },
'!=': function(l,r) { return l != r; },
'<': function(l,r) { return l < r; },
'>': function(l,r) { return l > r; },
'<=': function(l,r) { return l <= r; },
'>=': function(l,r) { return l >= r; },
'typeof': function(l,r) { return typeof l == r; }
};
if (!operators[operator])
throw new Error("Handlerbars Helper 'compare' doesn't know the operator "+operator);
var result = operators[operator](lvalue,rvalue);
return result ? options.fn(this) : options.inverse(this);
});
helpers.theme = theme;
HANDLEBARS.registerHelper( helpers );
};