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/**
* JSON Schema link handler
* Licensed under AFL-2.1 OR BSD-3-Clause
*/
(function (root, factory) {
if (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module.
define([], function () {
return factory();
});
} else if (typeof module === 'object' && module.exports) {
// Node. Does not work with strict CommonJS, but
// only CommonJS-like environments that support module.exports,
// like Node.
module.exports = factory();
} else {
// Browser globals
root.jsonSchemaLinks = factory();
}
}(this, function () {// setup primitive classes to be JSON Schema types
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;
}));