52 lines
1.6 KiB
JavaScript
52 lines
1.6 KiB
JavaScript
|
/**
|
||
|
|
* 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;
|
||
|
|
});
|