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    1 /**
    2  * JSONSchema Validator - Validates JavaScript objects using JSON Schemas
    3  *  (http://www.json.com/json-schema-proposal/)
    4  *
    5  * Copyright (c) 2007 Kris Zyp SitePen (www.sitepen.com)
    6  * Licensed under the MIT (MIT-LICENSE.txt) license.
    7 To use the validator call the validate function with an instance object and an optional schema object.
    8 If a schema is provided, it will be used to validate. If the instance object refers to a schema (self-validating),
    9 that schema will be used to validate and the schema parameter is not necessary (if both exist,
   10 both validations will occur).
   11 The validate method will return an array of validation errors. If there are no errors, then an
   12 empty list will be returned. A validation error will have two properties:
   13 "property" which indicates which property had the error
   14 "message" which indicates what the error was
   15  */
   16 (function (root, factory) {
   17     if (typeof define === 'function' && define.amd) {
   18         // AMD. Register as an anonymous module.
   19         define([], function () {
   20             return factory();
   21         });
   22     } else if (typeof module === 'object' && module.exports) {
   23         // Node. Does not work with strict CommonJS, but
   24         // only CommonJS-like environments that support module.exports,
   25         // like Node.
   26         module.exports = factory();
   27     } else {
   28         // Browser globals
   29         root.jsonSchema = factory();
   30     }
   31 }(this, function () {// setup primitive classes to be JSON Schema types
   32 var exports = validate
   33 exports.Integer = {type:"integer"};
   34 var primitiveConstructors = {
   35     String: String,
   36     Boolean: Boolean,
   37     Number: Number,
   38     Object: Object,
   39     Array: Array,
   40     Date: Date
   41 }
   42 exports.validate = validate;
   43 function validate(/*Any*/instance,/*Object*/schema) {
   44         // Summary:
   45         //      To use the validator call JSONSchema.validate with an instance object and an optional schema object.
   46         //      If a schema is provided, it will be used to validate. If the instance object refers to a schema (self-validating),
   47         //      that schema will be used to validate and the schema parameter is not necessary (if both exist,
   48         //      both validations will occur).
   49         //      The validate method will return an object with two properties:
   50         //          valid: A boolean indicating if the instance is valid by the schema
   51         //          errors: An array of validation errors. If there are no errors, then an
   52         //                  empty list will be returned. A validation error will have two properties:
   53         //                      property: which indicates which property had the error
   54         //                      message: which indicates what the error was
   55         //
   56         return validate(instance, schema, {changing: false});//, coerce: false, existingOnly: false});
   57     };
   58 exports.checkPropertyChange = function(/*Any*/value,/*Object*/schema, /*String*/property) {
   59         // Summary:
   60         //      The checkPropertyChange method will check to see if an value can legally be in property with the given schema
   61         //      This is slightly different than the validate method in that it will fail if the schema is readonly and it will
   62         //      not check for self-validation, it is assumed that the passed in value is already internally valid.
   63         //      The checkPropertyChange method will return the same object type as validate, see JSONSchema.validate for
   64         //      information.
   65         //
   66         return validate(value, schema, {changing: property || "property"});
   67     };
   68 var validate = exports._validate = function(/*Any*/instance,/*Object*/schema,/*Object*/options) {
   69 
   70     if (!options) options = {};
   71     var _changing = options.changing;
   72 
   73     function getType(schema){
   74         return schema.type || (primitiveConstructors[schema.name] == schema && schema.name.toLowerCase());
   75     }
   76     var errors = [];
   77     // validate a value against a property definition
   78     function checkProp(value, schema, path,i){
   79 
   80         var l;
   81         path += path ? typeof i == 'number' ? '[' + i + ']' : typeof i == 'undefined' ? '' : '.' + i : i;
   82         function addError(message){
   83             errors.push({property:path,message:message});
   84         }
   85 
   86         if((typeof schema != 'object' || schema instanceof Array) && (path || typeof schema != 'function') && !(schema && getType(schema))){
   87             if(typeof schema == 'function'){
   88                 if(!(value instanceof schema)){
   89                     addError("is not an instance of the class/constructor " + schema.name);
   90                 }
   91             }else if(schema){
   92                 addError("Invalid schema/property definition " + schema);
   93             }
   94             return null;
   95         }
   96         if(_changing && schema.readonly){
   97             addError("is a readonly field, it can not be changed");
   98         }
   99         if(schema['extends']){ // if it extends another schema, it must pass that schema as well
  100             checkProp(value,schema['extends'],path,i);
  101         }
  102         // validate a value against a type definition
  103         function checkType(type,value){
  104             if(type){
  105                 if(typeof type == 'string' && type != 'any' &&
  106                         (type == 'null' ? value !== null : typeof value != type) &&
  107                         !(value instanceof Array && type == 'array') &&
  108                         !(value instanceof Date && type == 'date') &&
  109                         !(type == 'integer' && value%1===0)){
  110                     return [{property:path,message:(typeof value) + " value found, but a " + type + " is required"}];
  111                 }
  112                 if(type instanceof Array){
  113                     var unionErrors=[];
  114                     for(var j = 0; j < type.length; j++){ // a union type
  115                         if(!(unionErrors=checkType(type[j],value)).length){
  116                             break;
  117                         }
  118                     }
  119                     if(unionErrors.length){
  120                         return unionErrors;
  121                     }
  122                 }else if(typeof type == 'object'){
  123                     var priorErrors = errors;
  124                     errors = [];
  125                     checkProp(value,type,path);
  126                     var theseErrors = errors;
  127                     errors = priorErrors;
  128                     return theseErrors;
  129                 }
  130             }
  131             return [];
  132         }
  133         if(value === undefined){
  134             if(schema.required){
  135                 addError("is missing and it is required");
  136             }
  137         }else{
  138             errors = errors.concat(checkType(getType(schema),value));
  139             if(schema.disallow && !checkType(schema.disallow,value).length){
  140                 addError(" disallowed value was matched");
  141             }
  142             if(value !== null){
  143                 if(value instanceof Array){
  144                     if(schema.items){
  145                         var itemsIsArray = schema.items instanceof Array;
  146                         var propDef = schema.items;
  147                         for (i = 0, l = value.length; i < l; i += 1) {
  148                             if (itemsIsArray)
  149                                 propDef = schema.items[i];
  150                             if (options.coerce)
  151                                 value[i] = options.coerce(value[i], propDef);
  152                             errors.concat(checkProp(value[i],propDef,path,i));
  153                         }
  154                     }
  155                     if(schema.minItems && value.length < schema.minItems){
  156                         addError("There must be a minimum of " + schema.minItems + " in the array");
  157                     }
  158                     if(schema.maxItems && value.length > schema.maxItems){
  159                         addError("There must be a maximum of " + schema.maxItems + " in the array");
  160                     }
  161                 }else if(schema.properties || schema.additionalProperties){
  162                     errors.concat(checkObj(value, schema.properties, path, schema.additionalProperties));
  163                 }
  164                 if(schema.pattern && typeof value == 'string' && !value.match(schema.pattern)){
  165                     addError("does not match the regex pattern " + schema.pattern);
  166                 }
  167                 if(schema.maxLength && typeof value == 'string' && value.length > schema.maxLength){
  168                     addError("may only be " + schema.maxLength + " characters long");
  169                 }
  170                 if(schema.minLength && typeof value == 'string' && value.length < schema.minLength){
  171                     addError("must be at least " + schema.minLength + " characters long");
  172                 }
  173                 if(typeof schema.minimum !== undefined && typeof value == typeof schema.minimum &&
  174                         schema.minimum > value){
  175                     addError("must have a minimum value of " + schema.minimum);
  176                 }
  177                 if(typeof schema.maximum !== undefined && typeof value == typeof schema.maximum &&
  178                         schema.maximum < value){
  179                     addError("must have a maximum value of " + schema.maximum);
  180                 }
  181                 if(schema['enum']){
  182                     var enumer = schema['enum'];
  183                     l = enumer.length;
  184                     var found;
  185                     for(var j = 0; j < l; j++){
  186                         if(enumer[j]===value){
  187                             found=1;
  188                             break;
  189                         }
  190                     }
  191                     if(!found){
  192                         addError("does not have a value in the enumeration " + enumer.join(", "));
  193                     }
  194                 }
  195                 if(typeof schema.maxDecimal == 'number' &&
  196                     (value.toString().match(new RegExp("\\.[0-9]{" + (schema.maxDecimal + 1) + ",}")))){
  197                     addError("may only have " + schema.maxDecimal + " digits of decimal places");
  198                 }
  199             }
  200         }
  201         return null;
  202     }
  203     // validate an object against a schema
  204     function checkObj(instance,objTypeDef,path,additionalProp){
  205 
  206         if(typeof objTypeDef =='object'){
  207             if(typeof instance != 'object' || instance instanceof Array){
  208                 errors.push({property:path,message:"an object is required"});
  209             }
  210             
  211             for(var i in objTypeDef){ 
  212                 if(objTypeDef.hasOwnProperty(i)){
  213                     var value = instance[i];
  214                     // skip _not_ specified properties
  215                     if (value === undefined && options.existingOnly) continue;
  216                     var propDef = objTypeDef[i];
  217                     // set default
  218                     if(value === undefined && propDef["default"]){
  219                         value = instance[i] = propDef["default"];
  220                     }
  221                     if(options.coerce && i in instance){
  222                         value = instance[i] = options.coerce(value, propDef);
  223                     }
  224                     checkProp(value,propDef,path,i);
  225                 }
  226             }
  227         }
  228         for(i in instance){
  229             if(instance.hasOwnProperty(i) && !(i.charAt(0) == '_' && i.charAt(1) == '_') && objTypeDef && !objTypeDef[i] && additionalProp===false){
  230                 if (options.filter) {
  231                     delete instance[i];
  232                     continue;
  233                 } else {
  234                     errors.push({property:path,message:(typeof value) + "The property " + i +
  235                         " is not defined in the schema and the schema does not allow additional properties"});
  236                 }
  237             }
  238             var requires = objTypeDef && objTypeDef[i] && objTypeDef[i].requires;
  239             if(requires && !(requires in instance)){
  240                 errors.push({property:path,message:"the presence of the property " + i + " requires that " + requires + " also be present"});
  241             }
  242             value = instance[i];
  243             if(additionalProp && (!(objTypeDef && typeof objTypeDef == 'object') || !(i in objTypeDef))){
  244                 if(options.coerce){
  245                     value = instance[i] = options.coerce(value, additionalProp);
  246                 }
  247                 checkProp(value,additionalProp,path,i);
  248             }
  249             if(!_changing && value && value.$schema){
  250                 errors = errors.concat(checkProp(value,value.$schema,path,i));
  251             }
  252         }
  253         return errors;
  254     }
  255     if(schema){
  256         checkProp(instance,schema,'',_changing || '');
  257     }
  258     if(!_changing && instance && instance.$schema){
  259         checkProp(instance,instance.$schema,'','');
  260     }
  261     return {valid:!errors.length,errors:errors};
  262 };
  263 exports.mustBeValid = function(result){
  264     //  summary:
  265     //      This checks to ensure that the result is valid and will throw an appropriate error message if it is not
  266     // result: the result returned from checkPropertyChange or validate
  267     if(!result.valid){
  268         throw new TypeError(result.errors.map(function(error){return "for property " + error.property + ': ' + error.message;}).join(", \n"));
  269     }
  270 }
  271 
  272 return exports;
  273 }));