| /** | |
| * JSON Schema link handler | |
| * Copyright (c) 2007 Kris Zyp SitePen (www.sitepen.com) | |
| * Licensed under the MIT (MIT-LICENSE.txt) license. | |
| */ | |
| ({define:typeof define!="undefined"?define:function(deps, factory){module.exports = factory();}}). | |
| define([], function(){ | |
| var exports = {}; | |
| exports.cacheLinks = true; | |
| exports.getLink = function(relation, instance, schema){ | |
| // gets the URI of the link for the given relation based on the instance and schema | |
| // for example: | |
| // getLink( | |
| // "brother", | |
| // {"brother_id":33}, | |
| // {links:[{rel:"brother", href:"Brother/{brother_id}"}]}) -> | |
| // "Brother/33" | |
| var links = schema.__linkTemplates; | |
| if(!links){ | |
| links = {}; | |
| var schemaLinks = schema.links; | |
| if(schemaLinks && schemaLinks instanceof Array){ | |
| schemaLinks.forEach(function(link){ | |
| /* // TODO: allow for multiple same-name relations | |
| if(links[link.rel]){ | |
| if(!(links[link.rel] instanceof Array)){ | |
| links[link.rel] = [links[link.rel]]; | |
| } | |
| }*/ | |
| links[link.rel] = link.href; | |
| }); | |
| } | |
| if(exports.cacheLinks){ | |
| schema.__linkTemplates = links; | |
| } | |
| } | |
| var linkTemplate = links[relation]; | |
| return linkTemplate && exports.substitute(linkTemplate, instance); | |
| }; | |
| exports.substitute = function(linkTemplate, instance){ | |
| return linkTemplate.replace(/\{([^\}]*)\}/g, function(t, property){ | |
| var value = instance[decodeURIComponent(property)]; | |
| if(value instanceof Array){ | |
| // the value is an array, it should produce a URI like /Table/(4,5,8) and store.get() should handle that as an array of values | |
| return '(' + value.join(',') + ')'; | |
| } | |
| return value; | |
| }); | |
| }; | |
| return exports; | |
| }); |