1 var genobj = require('generate-object-property')
2 var genfun = require('generate-function')
3 var jsonpointer = require('jsonpointer')
4 var xtend = require('xtend')
5 var formats = require('./formats')
7 var get = function(obj, additionalSchemas, ptr) {
9 var visit = function(sub) {
10 if (sub && sub.id === ptr) return sub
11 if (typeof sub !== 'object' || !sub) return null
12 return Object.keys(sub).reduce(function(res, k) {
13 return res || visit(sub[k])
20 ptr = ptr.replace(/^#/, '')
21 ptr = ptr.replace(/\/$/, '')
24 return jsonpointer.get(obj, decodeURI(ptr))
26 var end = ptr.indexOf('#')
30 // fragment doesn't exist.
32 other = additionalSchemas[ptr]
34 var ext = ptr.slice(0, end)
35 other = additionalSchemas[ext]
36 var fragment = ptr.slice(end).replace(/^#/, '')
38 return jsonpointer.get(other, fragment)
42 other = additionalSchemas[ptr]
48 var formatName = function(field) {
49 field = JSON.stringify(field)
50 var pattern = /\[([^\[\]"]+)\]/
51 while (pattern.test(field)) field = field.replace(pattern, '."+$1+"')
57 types.any = function() {
61 types.null = function(name) {
62 return name+' === null'
65 types.boolean = function(name) {
66 return 'typeof '+name+' === "boolean"'
69 types.array = function(name) {
70 return 'Array.isArray('+name+')'
73 types.object = function(name) {
74 return 'typeof '+name+' === "object" && '+name+' && !Array.isArray('+name+')'
77 types.number = function(name) {
78 return 'typeof '+name+' === "number"'
81 types.integer = function(name) {
82 return 'typeof '+name+' === "number" && (Math.floor('+name+') === '+name+' || '+name+' > 9007199254740992 || '+name+' < -9007199254740992)'
85 types.string = function(name) {
86 return 'typeof '+name+' === "string"'
89 var unique = function(array) {
91 for (var i = 0; i < array.length; i++) {
92 list.push(typeof array[i] === 'object' ? JSON.stringify(array[i]) : array[i])
94 for (var i = 1; i < list.length; i++) {
95 if (list.indexOf(list[i]) !== i) return false
100 var isMultipleOf = function(name, multipleOf) {
102 var factor = ((multipleOf | 0) !== multipleOf) ? Math.pow(10, multipleOf.toString().split('.').pop().length) : 1
104 var factorName = ((name | 0) !== name) ? Math.pow(10, name.toString().split('.').pop().length) : 1
105 if (factorName > factor) res = true
106 else res = Math.round(factor * name) % (factor * multipleOf)
108 else res = name % multipleOf;
112 var toType = function(node) {
116 var compile = function(schema, cache, root, reporter, opts) {
117 var fmts = opts ? xtend(formats, opts.formats) : formats
118 var scope = {unique:unique, formats:fmts, isMultipleOf:isMultipleOf}
119 var verbose = opts ? !!opts.verbose : false;
120 var greedy = opts && opts.greedy !== undefined ?
124 var gensym = function(name) {
125 return name+(syms[name] = (syms[name] || 0)+1)
128 var reversePatterns = {}
129 var patterns = function(p) {
130 if (reversePatterns[p]) return reversePatterns[p]
131 var n = gensym('pattern')
132 scope[n] = new RegExp(p)
133 reversePatterns[p] = n
137 var vars = ['i','j','k','l','m','n','o','p','q','r','s','t','u','v','x','y','z']
138 var genloop = function() {
144 var visit = function(name, node, reporter, filter) {
145 var properties = node.properties
149 if (Array.isArray(node.items)) { // tuple type
151 node.items.forEach(function(item, i) {
159 var error = function(msg, prop, value) {
161 if (reporter === true) {
162 validate('if (validate.errors === null) validate.errors = []')
164 validate('validate.errors.push({field:%s,message:%s,value:%s,type:%s})', formatName(prop || name), JSON.stringify(msg), value || name, JSON.stringify(type))
166 validate('validate.errors.push({field:%s,message:%s})', formatName(prop || name), JSON.stringify(msg))
171 if (node.required === true) {
173 validate('if (%s === undefined) {', name)
178 validate('if (%s !== undefined) {', name)
181 var valid = [].concat(type)
183 return types[t || 'any'](name)
185 .join(' || ') || 'true'
187 if (valid !== 'true') {
189 validate('if (!(%s)) {', valid)
190 error('is the wrong type')
195 if (node.additionalItems === false) {
196 validate('if (%s.length > %d) {', name, node.items.length)
197 error('has additional items')
199 } else if (node.additionalItems) {
201 validate('for (var %s = %d; %s < %s.length; %s++) {', i, node.items.length, i, name, i)
202 visit(name+'['+i+']', node.additionalItems, reporter, filter)
207 if (node.format && fmts[node.format]) {
208 if (type !== 'string' && formats[node.format]) validate('if (%s) {', types.string(name))
209 var n = gensym('format')
210 scope[n] = fmts[node.format]
212 if (typeof scope[n] === 'function') validate('if (!%s(%s)) {', n, name)
213 else validate('if (!%s.test(%s)) {', n, name)
214 error('must be '+node.format+' format')
216 if (type !== 'string' && formats[node.format]) validate('}')
219 if (Array.isArray(node.required)) {
220 var isUndefined = function(req) {
221 return genobj(name, req) + ' === undefined'
224 var checkRequired = function (req) {
225 var prop = genobj(name, req);
226 validate('if (%s === undefined) {', prop)
227 error('is required', prop)
228 validate('missing++')
231 validate('if ((%s)) {', type !== 'object' ? types.object(name) : 'true')
232 validate('var missing = 0')
233 node.required.map(checkRequired)
236 validate('if (missing === 0) {')
241 if (node.uniqueItems) {
242 if (type !== 'array') validate('if (%s) {', types.array(name))
243 validate('if (!(unique(%s))) {', name)
244 error('must be unique')
246 if (type !== 'array') validate('}')
250 var complex = node.enum.some(function(e) {
251 return typeof e === 'object'
254 var compare = complex ?
256 return 'JSON.stringify('+name+')'+' !== JSON.stringify('+JSON.stringify(e)+')'
259 return name+' !== '+JSON.stringify(e)
262 validate('if (%s) {', node.enum.map(compare).join(' && ') || 'false')
263 error('must be an enum value')
267 if (node.dependencies) {
268 if (type !== 'object') validate('if (%s) {', types.object(name))
270 Object.keys(node.dependencies).forEach(function(key) {
271 var deps = node.dependencies[key]
272 if (typeof deps === 'string') deps = [deps]
274 var exists = function(k) {
275 return genobj(name, k) + ' !== undefined'
278 if (Array.isArray(deps)) {
279 validate('if (%s !== undefined && !(%s)) {', genobj(name, key), deps.map(exists).join(' && ') || 'true')
280 error('dependencies not set')
283 if (typeof deps === 'object') {
284 validate('if (%s !== undefined) {', genobj(name, key))
285 visit(name, deps, reporter, filter)
290 if (type !== 'object') validate('}')
293 if (node.additionalProperties || node.additionalProperties === false) {
294 if (type !== 'object') validate('if (%s) {', types.object(name))
297 var keys = gensym('keys')
299 var toCompare = function(p) {
300 return keys+'['+i+'] !== '+JSON.stringify(p)
303 var toTest = function(p) {
304 return '!'+patterns(p)+'.test('+keys+'['+i+'])'
307 var additionalProp = Object.keys(properties || {}).map(toCompare)
308 .concat(Object.keys(node.patternProperties || {}).map(toTest))
309 .join(' && ') || 'true'
311 validate('var %s = Object.keys(%s)', keys, name)
312 ('for (var %s = 0; %s < %s.length; %s++) {', i, i, keys, i)
313 ('if (%s) {', additionalProp)
315 if (node.additionalProperties === false) {
316 if (filter) validate('delete %s', name+'['+keys+'['+i+']]')
317 error('has additional properties', null, JSON.stringify(name+'.') + ' + ' + keys + '['+i+']')
319 visit(name+'['+keys+'['+i+']]', node.additionalProperties, reporter, filter)
326 if (type !== 'object') validate('}')
330 var sub = get(root, opts && opts.schemas || {}, node.$ref)
332 var fn = cache[node.$ref]
334 cache[node.$ref] = function proxy(data) {
337 fn = compile(sub, cache, root, false, opts)
339 var n = gensym('ref')
341 validate('if (!(%s(%s))) {', n, name)
342 error('referenced schema does not match')
348 var prev = gensym('prev')
349 validate('var %s = errors', prev)
350 visit(name, node.not, false, filter)
351 validate('if (%s === errors) {', prev)
352 error('negative schema matches')
354 ('errors = %s', prev)
358 if (node.items && !tuple) {
359 if (type !== 'array') validate('if (%s) {', types.array(name))
362 validate('for (var %s = 0; %s < %s.length; %s++) {', i, i, name, i)
363 visit(name+'['+i+']', node.items, reporter, filter)
366 if (type !== 'array') validate('}')
369 if (node.patternProperties) {
370 if (type !== 'object') validate('if (%s) {', types.object(name))
371 var keys = gensym('keys')
374 ('var %s = Object.keys(%s)', keys, name)
375 ('for (var %s = 0; %s < %s.length; %s++) {', i, i, keys, i)
377 Object.keys(node.patternProperties).forEach(function(key) {
378 var p = patterns(key)
379 validate('if (%s.test(%s)) {', p, keys+'['+i+']')
380 visit(name+'['+keys+'['+i+']]', node.patternProperties[key], reporter, filter)
385 if (type !== 'object') validate('}')
389 var p = patterns(node.pattern)
390 if (type !== 'string') validate('if (%s) {', types.string(name))
391 validate('if (!(%s.test(%s))) {', p, name)
392 error('pattern mismatch')
394 if (type !== 'string') validate('}')
398 node.allOf.forEach(function(sch) {
399 visit(name, sch, reporter, filter)
403 if (node.anyOf && node.anyOf.length) {
404 var prev = gensym('prev')
406 node.anyOf.forEach(function(sch, i) {
408 validate('var %s = errors', prev)
410 validate('if (errors !== %s) {', prev)
411 ('errors = %s', prev)
413 visit(name, sch, false, false)
415 node.anyOf.forEach(function(sch, i) {
418 validate('if (%s !== errors) {', prev)
419 error('no schemas match')
423 if (node.oneOf && node.oneOf.length) {
424 var prev = gensym('prev')
425 var passes = gensym('passes')
428 ('var %s = errors', prev)
429 ('var %s = 0', passes)
431 node.oneOf.forEach(function(sch, i) {
432 visit(name, sch, false, false)
433 validate('if (%s === errors) {', prev)
436 ('errors = %s', prev)
440 validate('if (%s !== 1) {', passes)
441 error('no (or more than one) schemas match')
445 if (node.multipleOf !== undefined) {
446 if (type !== 'number' && type !== 'integer') validate('if (%s) {', types.number(name))
448 validate('if (!isMultipleOf(%s, %d)) {', name, node.multipleOf)
450 error('has a remainder')
453 if (type !== 'number' && type !== 'integer') validate('}')
456 if (node.maxProperties !== undefined) {
457 if (type !== 'object') validate('if (%s) {', types.object(name))
459 validate('if (Object.keys(%s).length > %d) {', name, node.maxProperties)
460 error('has more properties than allowed')
463 if (type !== 'object') validate('}')
466 if (node.minProperties !== undefined) {
467 if (type !== 'object') validate('if (%s) {', types.object(name))
469 validate('if (Object.keys(%s).length < %d) {', name, node.minProperties)
470 error('has less properties than allowed')
473 if (type !== 'object') validate('}')
476 if (node.maxItems !== undefined) {
477 if (type !== 'array') validate('if (%s) {', types.array(name))
479 validate('if (%s.length > %d) {', name, node.maxItems)
480 error('has more items than allowed')
483 if (type !== 'array') validate('}')
486 if (node.minItems !== undefined) {
487 if (type !== 'array') validate('if (%s) {', types.array(name))
489 validate('if (%s.length < %d) {', name, node.minItems)
490 error('has less items than allowed')
493 if (type !== 'array') validate('}')
496 if (node.maxLength !== undefined) {
497 if (type !== 'string') validate('if (%s) {', types.string(name))
499 validate('if (%s.length > %d) {', name, node.maxLength)
500 error('has longer length than allowed')
503 if (type !== 'string') validate('}')
506 if (node.minLength !== undefined) {
507 if (type !== 'string') validate('if (%s) {', types.string(name))
509 validate('if (%s.length < %d) {', name, node.minLength)
510 error('has less length than allowed')
513 if (type !== 'string') validate('}')
516 if (node.minimum !== undefined) {
517 validate('if (%s %s %d) {', name, node.exclusiveMinimum ? '<=' : '<', node.minimum)
518 error('is less than minimum')
522 if (node.maximum !== undefined) {
523 validate('if (%s %s %d) {', name, node.exclusiveMaximum ? '>=' : '>', node.maximum)
524 error('is more than maximum')
529 Object.keys(properties).forEach(function(p) {
530 if (Array.isArray(type) && type.indexOf('null') !== -1) validate('if (%s !== null) {', name)
532 visit(genobj(name, p), properties[p], reporter, filter)
534 if (Array.isArray(type) && type.indexOf('null') !== -1) validate('}')
538 while (indent--) validate('}')
541 var validate = genfun
542 ('function validate(data) {')
543 ('validate.errors = null')
546 visit('data', schema, reporter, opts && opts.filter)
549 ('return errors === 0')
552 validate = validate.toFunction(scope)
553 validate.errors = null
555 if (Object.defineProperty) {
556 Object.defineProperty(validate, 'error', {
558 if (!validate.errors) return ''
559 return validate.errors.map(function(err) {
560 return err.field + ' ' + err.message;
566 validate.toJSON = function() {
573 module.exports = function(schema, opts) {
574 if (typeof schema === 'string') schema = JSON.parse(schema)
575 return compile(schema, {}, schema, true, opts)
578 module.exports.filter = function(schema, opts) {
579 var validate = module.exports(schema, xtend(opts, {filter: true}))
580 return function(sch) {