274 lines
11 KiB
JavaScript
274 lines
11 KiB
JavaScript
/**
|
|
* JSONSchema Validator - Validates JavaScript objects using JSON Schemas
|
|
* (http://www.json.com/json-schema-proposal/)
|
|
*
|
|
* Copyright (c) 2007 Kris Zyp SitePen (www.sitepen.com)
|
|
* Licensed under the MIT (MIT-LICENSE.txt) license.
|
|
To use the validator call the validate function with an instance object and an optional schema object.
|
|
If a schema is provided, it will be used to validate. If the instance object refers to a schema (self-validating),
|
|
that schema will be used to validate and the schema parameter is not necessary (if both exist,
|
|
both validations will occur).
|
|
The validate method will return an array of validation errors. If there are no errors, then an
|
|
empty list will be returned. A validation error will have two properties:
|
|
"property" which indicates which property had the error
|
|
"message" which indicates what the error was
|
|
*/
|
|
(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.jsonSchema = factory();
|
|
}
|
|
}(this, function () {// setup primitive classes to be JSON Schema types
|
|
var exports = validate
|
|
exports.Integer = {type:"integer"};
|
|
var primitiveConstructors = {
|
|
String: String,
|
|
Boolean: Boolean,
|
|
Number: Number,
|
|
Object: Object,
|
|
Array: Array,
|
|
Date: Date
|
|
}
|
|
exports.validate = validate;
|
|
function validate(/*Any*/instance,/*Object*/schema) {
|
|
// Summary:
|
|
// To use the validator call JSONSchema.validate with an instance object and an optional schema object.
|
|
// If a schema is provided, it will be used to validate. If the instance object refers to a schema (self-validating),
|
|
// that schema will be used to validate and the schema parameter is not necessary (if both exist,
|
|
// both validations will occur).
|
|
// The validate method will return an object with two properties:
|
|
// valid: A boolean indicating if the instance is valid by the schema
|
|
// errors: An array of validation errors. If there are no errors, then an
|
|
// empty list will be returned. A validation error will have two properties:
|
|
// property: which indicates which property had the error
|
|
// message: which indicates what the error was
|
|
//
|
|
return validate(instance, schema, {changing: false});//, coerce: false, existingOnly: false});
|
|
};
|
|
exports.checkPropertyChange = function(/*Any*/value,/*Object*/schema, /*String*/property) {
|
|
// Summary:
|
|
// The checkPropertyChange method will check to see if an value can legally be in property with the given schema
|
|
// This is slightly different than the validate method in that it will fail if the schema is readonly and it will
|
|
// not check for self-validation, it is assumed that the passed in value is already internally valid.
|
|
// The checkPropertyChange method will return the same object type as validate, see JSONSchema.validate for
|
|
// information.
|
|
//
|
|
return validate(value, schema, {changing: property || "property"});
|
|
};
|
|
var validate = exports._validate = function(/*Any*/instance,/*Object*/schema,/*Object*/options) {
|
|
|
|
if (!options) options = {};
|
|
var _changing = options.changing;
|
|
|
|
function getType(schema){
|
|
return schema.type || (primitiveConstructors[schema.name] == schema && schema.name.toLowerCase());
|
|
}
|
|
var errors = [];
|
|
// validate a value against a property definition
|
|
function checkProp(value, schema, path,i){
|
|
|
|
var l;
|
|
path += path ? typeof i == 'number' ? '[' + i + ']' : typeof i == 'undefined' ? '' : '.' + i : i;
|
|
function addError(message){
|
|
errors.push({property:path,message:message});
|
|
}
|
|
|
|
if((typeof schema != 'object' || schema instanceof Array) && (path || typeof schema != 'function') && !(schema && getType(schema))){
|
|
if(typeof schema == 'function'){
|
|
if(!(value instanceof schema)){
|
|
addError("is not an instance of the class/constructor " + schema.name);
|
|
}
|
|
}else if(schema){
|
|
addError("Invalid schema/property definition " + schema);
|
|
}
|
|
return null;
|
|
}
|
|
if(_changing && schema.readonly){
|
|
addError("is a readonly field, it can not be changed");
|
|
}
|
|
if(schema['extends']){ // if it extends another schema, it must pass that schema as well
|
|
checkProp(value,schema['extends'],path,i);
|
|
}
|
|
// validate a value against a type definition
|
|
function checkType(type,value){
|
|
if(type){
|
|
if(typeof type == 'string' && type != 'any' &&
|
|
(type == 'null' ? value !== null : typeof value != type) &&
|
|
!(value instanceof Array && type == 'array') &&
|
|
!(value instanceof Date && type == 'date') &&
|
|
!(type == 'integer' && value%1===0)){
|
|
return [{property:path,message:(typeof value) + " value found, but a " + type + " is required"}];
|
|
}
|
|
if(type instanceof Array){
|
|
var unionErrors=[];
|
|
for(var j = 0; j < type.length; j++){ // a union type
|
|
if(!(unionErrors=checkType(type[j],value)).length){
|
|
break;
|
|
}
|
|
}
|
|
if(unionErrors.length){
|
|
return unionErrors;
|
|
}
|
|
}else if(typeof type == 'object'){
|
|
var priorErrors = errors;
|
|
errors = [];
|
|
checkProp(value,type,path);
|
|
var theseErrors = errors;
|
|
errors = priorErrors;
|
|
return theseErrors;
|
|
}
|
|
}
|
|
return [];
|
|
}
|
|
if(value === undefined){
|
|
if(schema.required){
|
|
addError("is missing and it is required");
|
|
}
|
|
}else{
|
|
errors = errors.concat(checkType(getType(schema),value));
|
|
if(schema.disallow && !checkType(schema.disallow,value).length){
|
|
addError(" disallowed value was matched");
|
|
}
|
|
if(value !== null){
|
|
if(value instanceof Array){
|
|
if(schema.items){
|
|
var itemsIsArray = schema.items instanceof Array;
|
|
var propDef = schema.items;
|
|
for (i = 0, l = value.length; i < l; i += 1) {
|
|
if (itemsIsArray)
|
|
propDef = schema.items[i];
|
|
if (options.coerce)
|
|
value[i] = options.coerce(value[i], propDef);
|
|
errors.concat(checkProp(value[i],propDef,path,i));
|
|
}
|
|
}
|
|
if(schema.minItems && value.length < schema.minItems){
|
|
addError("There must be a minimum of " + schema.minItems + " in the array");
|
|
}
|
|
if(schema.maxItems && value.length > schema.maxItems){
|
|
addError("There must be a maximum of " + schema.maxItems + " in the array");
|
|
}
|
|
}else if(schema.properties || schema.additionalProperties){
|
|
errors.concat(checkObj(value, schema.properties, path, schema.additionalProperties));
|
|
}
|
|
if(schema.pattern && typeof value == 'string' && !value.match(schema.pattern)){
|
|
addError("does not match the regex pattern " + schema.pattern);
|
|
}
|
|
if(schema.maxLength && typeof value == 'string' && value.length > schema.maxLength){
|
|
addError("may only be " + schema.maxLength + " characters long");
|
|
}
|
|
if(schema.minLength && typeof value == 'string' && value.length < schema.minLength){
|
|
addError("must be at least " + schema.minLength + " characters long");
|
|
}
|
|
if(typeof schema.minimum !== undefined && typeof value == typeof schema.minimum &&
|
|
schema.minimum > value){
|
|
addError("must have a minimum value of " + schema.minimum);
|
|
}
|
|
if(typeof schema.maximum !== undefined && typeof value == typeof schema.maximum &&
|
|
schema.maximum < value){
|
|
addError("must have a maximum value of " + schema.maximum);
|
|
}
|
|
if(schema['enum']){
|
|
var enumer = schema['enum'];
|
|
l = enumer.length;
|
|
var found;
|
|
for(var j = 0; j < l; j++){
|
|
if(enumer[j]===value){
|
|
found=1;
|
|
break;
|
|
}
|
|
}
|
|
if(!found){
|
|
addError("does not have a value in the enumeration " + enumer.join(", "));
|
|
}
|
|
}
|
|
if(typeof schema.maxDecimal == 'number' &&
|
|
(value.toString().match(new RegExp("\\.[0-9]{" + (schema.maxDecimal + 1) + ",}")))){
|
|
addError("may only have " + schema.maxDecimal + " digits of decimal places");
|
|
}
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
// validate an object against a schema
|
|
function checkObj(instance,objTypeDef,path,additionalProp){
|
|
|
|
if(typeof objTypeDef =='object'){
|
|
if(typeof instance != 'object' || instance instanceof Array){
|
|
errors.push({property:path,message:"an object is required"});
|
|
}
|
|
|
|
for(var i in objTypeDef){
|
|
if(objTypeDef.hasOwnProperty(i)){
|
|
var value = instance[i];
|
|
// skip _not_ specified properties
|
|
if (value === undefined && options.existingOnly) continue;
|
|
var propDef = objTypeDef[i];
|
|
// set default
|
|
if(value === undefined && propDef["default"]){
|
|
value = instance[i] = propDef["default"];
|
|
}
|
|
if(options.coerce && i in instance){
|
|
value = instance[i] = options.coerce(value, propDef);
|
|
}
|
|
checkProp(value,propDef,path,i);
|
|
}
|
|
}
|
|
}
|
|
for(i in instance){
|
|
if(instance.hasOwnProperty(i) && !(i.charAt(0) == '_' && i.charAt(1) == '_') && objTypeDef && !objTypeDef[i] && additionalProp===false){
|
|
if (options.filter) {
|
|
delete instance[i];
|
|
continue;
|
|
} else {
|
|
errors.push({property:path,message:(typeof value) + "The property " + i +
|
|
" is not defined in the schema and the schema does not allow additional properties"});
|
|
}
|
|
}
|
|
var requires = objTypeDef && objTypeDef[i] && objTypeDef[i].requires;
|
|
if(requires && !(requires in instance)){
|
|
errors.push({property:path,message:"the presence of the property " + i + " requires that " + requires + " also be present"});
|
|
}
|
|
value = instance[i];
|
|
if(additionalProp && (!(objTypeDef && typeof objTypeDef == 'object') || !(i in objTypeDef))){
|
|
if(options.coerce){
|
|
value = instance[i] = options.coerce(value, additionalProp);
|
|
}
|
|
checkProp(value,additionalProp,path,i);
|
|
}
|
|
if(!_changing && value && value.$schema){
|
|
errors = errors.concat(checkProp(value,value.$schema,path,i));
|
|
}
|
|
}
|
|
return errors;
|
|
}
|
|
if(schema){
|
|
checkProp(instance,schema,'',_changing || '');
|
|
}
|
|
if(!_changing && instance && instance.$schema){
|
|
checkProp(instance,instance.$schema,'','');
|
|
}
|
|
return {valid:!errors.length,errors:errors};
|
|
};
|
|
exports.mustBeValid = function(result){
|
|
// summary:
|
|
// This checks to ensure that the result is valid and will throw an appropriate error message if it is not
|
|
// result: the result returned from checkPropertyChange or validate
|
|
if(!result.valid){
|
|
throw new TypeError(result.errors.map(function(error){return "for property " + error.property + ': ' + error.message;}).join(", \n"));
|
|
}
|
|
}
|
|
|
|
return exports;
|
|
}));
|