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66 lines
2.1 KiB
66 lines
2.1 KiB
/** |
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* JSON Schema link handler |
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* Copyright (c) 2007 Kris Zyp SitePen (www.sitepen.com) |
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* Licensed under the MIT (MIT-LICENSE.txt) license. |
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*/ |
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(function (root, factory) { |
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if (typeof define === 'function' && define.amd) { |
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// AMD. Register as an anonymous module. |
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define([], function () { |
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return factory(); |
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}); |
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} else if (typeof module === 'object' && module.exports) { |
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// Node. Does not work with strict CommonJS, but |
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// only CommonJS-like environments that support module.exports, |
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// like Node. |
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module.exports = factory(); |
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} else { |
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// Browser globals |
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root.jsonSchemaLinks = factory(); |
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} |
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}(this, function () {// setup primitive classes to be JSON Schema types |
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var exports = {}; |
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exports.cacheLinks = true; |
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exports.getLink = function(relation, instance, schema){ |
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// gets the URI of the link for the given relation based on the instance and schema |
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// for example: |
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// getLink( |
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// "brother", |
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// {"brother_id":33}, |
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// {links:[{rel:"brother", href:"Brother/{brother_id}"}]}) -> |
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// "Brother/33" |
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var links = schema.__linkTemplates; |
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if(!links){ |
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links = {}; |
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var schemaLinks = schema.links; |
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if(schemaLinks && schemaLinks instanceof Array){ |
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schemaLinks.forEach(function(link){ |
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/* // TODO: allow for multiple same-name relations |
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if(links[link.rel]){ |
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if(!(links[link.rel] instanceof Array)){ |
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links[link.rel] = [links[link.rel]]; |
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} |
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}*/ |
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links[link.rel] = link.href; |
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}); |
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} |
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if(exports.cacheLinks){ |
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schema.__linkTemplates = links; |
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} |
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} |
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var linkTemplate = links[relation]; |
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return linkTemplate && exports.substitute(linkTemplate, instance); |
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}; |
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|
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exports.substitute = function(linkTemplate, instance){ |
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return linkTemplate.replace(/\{([^\}]*)\}/g, function(t, property){ |
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var value = instance[decodeURIComponent(property)]; |
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if(value instanceof Array){ |
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// 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 |
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return '(' + value.join(',') + ')'; |
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} |
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return value; |
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}); |
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}; |
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return exports; |
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})); |