'use strict';
|
|
var URI = require('uri-js')
|
, equal = require('fast-deep-equal')
|
, util = require('./util')
|
, SchemaObject = require('./schema_obj')
|
, traverse = require('json-schema-traverse');
|
|
module.exports = resolve;
|
|
resolve.normalizeId = normalizeId;
|
resolve.fullPath = getFullPath;
|
resolve.url = resolveUrl;
|
resolve.ids = resolveIds;
|
resolve.inlineRef = inlineRef;
|
resolve.schema = resolveSchema;
|
|
/**
|
* [resolve and compile the references ($ref)]
|
* @this Ajv
|
* @param {Function} compile reference to schema compilation funciton (localCompile)
|
* @param {Object} root object with information about the root schema for the current schema
|
* @param {String} ref reference to resolve
|
* @return {Object|Function} schema object (if the schema can be inlined) or validation function
|
*/
|
function resolve(compile, root, ref) {
|
/* jshint validthis: true */
|
var refVal = this._refs[ref];
|
if (typeof refVal == 'string') {
|
if (this._refs[refVal]) refVal = this._refs[refVal];
|
else return resolve.call(this, compile, root, refVal);
|
}
|
|
refVal = refVal || this._schemas[ref];
|
if (refVal instanceof SchemaObject) {
|
return inlineRef(refVal.schema, this._opts.inlineRefs)
|
? refVal.schema
|
: refVal.validate || this._compile(refVal);
|
}
|
|
var res = resolveSchema.call(this, root, ref);
|
var schema, v, baseId;
|
if (res) {
|
schema = res.schema;
|
root = res.root;
|
baseId = res.baseId;
|
}
|
|
if (schema instanceof SchemaObject) {
|
v = schema.validate || compile.call(this, schema.schema, root, undefined, baseId);
|
} else if (schema !== undefined) {
|
v = inlineRef(schema, this._opts.inlineRefs)
|
? schema
|
: compile.call(this, schema, root, undefined, baseId);
|
}
|
|
return v;
|
}
|
|
|
/**
|
* Resolve schema, its root and baseId
|
* @this Ajv
|
* @param {Object} root root object with properties schema, refVal, refs
|
* @param {String} ref reference to resolve
|
* @return {Object} object with properties schema, root, baseId
|
*/
|
function resolveSchema(root, ref) {
|
/* jshint validthis: true */
|
var p = URI.parse(ref)
|
, refPath = _getFullPath(p)
|
, baseId = getFullPath(this._getId(root.schema));
|
if (Object.keys(root.schema).length === 0 || refPath !== baseId) {
|
var id = normalizeId(refPath);
|
var refVal = this._refs[id];
|
if (typeof refVal == 'string') {
|
return resolveRecursive.call(this, root, refVal, p);
|
} else if (refVal instanceof SchemaObject) {
|
if (!refVal.validate) this._compile(refVal);
|
root = refVal;
|
} else {
|
refVal = this._schemas[id];
|
if (refVal instanceof SchemaObject) {
|
if (!refVal.validate) this._compile(refVal);
|
if (id == normalizeId(ref))
|
return { schema: refVal, root: root, baseId: baseId };
|
root = refVal;
|
} else {
|
return;
|
}
|
}
|
if (!root.schema) return;
|
baseId = getFullPath(this._getId(root.schema));
|
}
|
return getJsonPointer.call(this, p, baseId, root.schema, root);
|
}
|
|
|
/* @this Ajv */
|
function resolveRecursive(root, ref, parsedRef) {
|
/* jshint validthis: true */
|
var res = resolveSchema.call(this, root, ref);
|
if (res) {
|
var schema = res.schema;
|
var baseId = res.baseId;
|
root = res.root;
|
var id = this._getId(schema);
|
if (id) baseId = resolveUrl(baseId, id);
|
return getJsonPointer.call(this, parsedRef, baseId, schema, root);
|
}
|
}
|
|
|
var PREVENT_SCOPE_CHANGE = util.toHash(['properties', 'patternProperties', 'enum', 'dependencies', 'definitions']);
|
/* @this Ajv */
|
function getJsonPointer(parsedRef, baseId, schema, root) {
|
/* jshint validthis: true */
|
parsedRef.fragment = parsedRef.fragment || '';
|
if (parsedRef.fragment.slice(0,1) != '/') return;
|
var parts = parsedRef.fragment.split('/');
|
|
for (var i = 1; i < parts.length; i++) {
|
var part = parts[i];
|
if (part) {
|
part = util.unescapeFragment(part);
|
schema = schema[part];
|
if (schema === undefined) break;
|
var id;
|
if (!PREVENT_SCOPE_CHANGE[part]) {
|
id = this._getId(schema);
|
if (id) baseId = resolveUrl(baseId, id);
|
if (schema.$ref) {
|
var $ref = resolveUrl(baseId, schema.$ref);
|
var res = resolveSchema.call(this, root, $ref);
|
if (res) {
|
schema = res.schema;
|
root = res.root;
|
baseId = res.baseId;
|
}
|
}
|
}
|
}
|
}
|
if (schema !== undefined && schema !== root.schema)
|
return { schema: schema, root: root, baseId: baseId };
|
}
|
|
|
var SIMPLE_INLINED = util.toHash([
|
'type', 'format', 'pattern',
|
'maxLength', 'minLength',
|
'maxProperties', 'minProperties',
|
'maxItems', 'minItems',
|
'maximum', 'minimum',
|
'uniqueItems', 'multipleOf',
|
'required', 'enum'
|
]);
|
function inlineRef(schema, limit) {
|
if (limit === false) return false;
|
if (limit === undefined || limit === true) return checkNoRef(schema);
|
else if (limit) return countKeys(schema) <= limit;
|
}
|
|
|
function checkNoRef(schema) {
|
var item;
|
if (Array.isArray(schema)) {
|
for (var i=0; i<schema.length; i++) {
|
item = schema[i];
|
if (typeof item == 'object' && !checkNoRef(item)) return false;
|
}
|
} else {
|
for (var key in schema) {
|
if (key == '$ref') return false;
|
item = schema[key];
|
if (typeof item == 'object' && !checkNoRef(item)) return false;
|
}
|
}
|
return true;
|
}
|
|
|
function countKeys(schema) {
|
var count = 0, item;
|
if (Array.isArray(schema)) {
|
for (var i=0; i<schema.length; i++) {
|
item = schema[i];
|
if (typeof item == 'object') count += countKeys(item);
|
if (count == Infinity) return Infinity;
|
}
|
} else {
|
for (var key in schema) {
|
if (key == '$ref') return Infinity;
|
if (SIMPLE_INLINED[key]) {
|
count++;
|
} else {
|
item = schema[key];
|
if (typeof item == 'object') count += countKeys(item) + 1;
|
if (count == Infinity) return Infinity;
|
}
|
}
|
}
|
return count;
|
}
|
|
|
function getFullPath(id, normalize) {
|
if (normalize !== false) id = normalizeId(id);
|
var p = URI.parse(id);
|
return _getFullPath(p);
|
}
|
|
|
function _getFullPath(p) {
|
return URI.serialize(p).split('#')[0] + '#';
|
}
|
|
|
var TRAILING_SLASH_HASH = /#\/?$/;
|
function normalizeId(id) {
|
return id ? id.replace(TRAILING_SLASH_HASH, '') : '';
|
}
|
|
|
function resolveUrl(baseId, id) {
|
id = normalizeId(id);
|
return URI.resolve(baseId, id);
|
}
|
|
|
/* @this Ajv */
|
function resolveIds(schema) {
|
var schemaId = normalizeId(this._getId(schema));
|
var baseIds = {'': schemaId};
|
var fullPaths = {'': getFullPath(schemaId, false)};
|
var localRefs = {};
|
var self = this;
|
|
traverse(schema, {allKeys: true}, function(sch, jsonPtr, rootSchema, parentJsonPtr, parentKeyword, parentSchema, keyIndex) {
|
if (jsonPtr === '') return;
|
var id = self._getId(sch);
|
var baseId = baseIds[parentJsonPtr];
|
var fullPath = fullPaths[parentJsonPtr] + '/' + parentKeyword;
|
if (keyIndex !== undefined)
|
fullPath += '/' + (typeof keyIndex == 'number' ? keyIndex : util.escapeFragment(keyIndex));
|
|
if (typeof id == 'string') {
|
id = baseId = normalizeId(baseId ? URI.resolve(baseId, id) : id);
|
|
var refVal = self._refs[id];
|
if (typeof refVal == 'string') refVal = self._refs[refVal];
|
if (refVal && refVal.schema) {
|
if (!equal(sch, refVal.schema))
|
throw new Error('id "' + id + '" resolves to more than one schema');
|
} else if (id != normalizeId(fullPath)) {
|
if (id[0] == '#') {
|
if (localRefs[id] && !equal(sch, localRefs[id]))
|
throw new Error('id "' + id + '" resolves to more than one schema');
|
localRefs[id] = sch;
|
} else {
|
self._refs[id] = fullPath;
|
}
|
}
|
}
|
baseIds[jsonPtr] = baseId;
|
fullPaths[jsonPtr] = fullPath;
|
});
|
|
return localRefs;
|
}
|
