Support polymorphic anyof (#69)

lib/helpers.js

@@ -112,6 +112,7 @@ function createJSONValidator () {
   ZSchemaValidator.JsonValidators.enum = customValidators.enumValidator;
   ZSchemaValidator.JsonValidators.type = customValidators.typeValidator;
   ZSchemaValidator.JsonValidators.required = customValidators.requiredPropertyValidator;
+  ZSchemaValidator.JsonValidators.oneOf = customValidators.oneOf;
 
   var validator = new ZSchema({
     breakOnFirstError: false,
@@ -195,7 +196,7 @@ var convertValue = module.exports.convertValue = function (schema, options, valu
     (Array.isArray(type) && type.some(function (t) {
       return types.indexOf(t) === -1;
     }))))) {
-      throw new TypeError('Invalid \'type\' value: ' + type);
+    throw new TypeError('Invalid \'type\' value: ' + type);
   }
 
   // Since JSON Schema allows you to not specify a type and it is treated as a wildcard of sorts, we should not do any

lib/validation/custom-zschema-validators.js

@@ -1,5 +1,7 @@
 
 'use strict';
+var Report = require('z-schema/src/Report');
+var ZSchemaValidator = require('z-schema/src/JsonValidation');
 
 function enumValidator (report, schema, json) {
   var match = false;
@@ -45,7 +47,7 @@ function requiredPropertyValidator (report, schema, json) {
   var idx = schema.required.length;
   var requiredPropertyName;
   var xMsMutability;
- 
+
   while (idx--) {
     requiredPropertyName = schema.required[idx];
     xMsMutability = (schema.properties && schema.properties[`${requiredPropertyName}`]) && schema.properties[`${requiredPropertyName}`]['x-ms-mutability'];
@@ -86,6 +88,61 @@ function typeValidator (report, schema, json) {
   }
 }
 
+function oneOf (report, schema, json) {
+  // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.5.2
+  var passes = 0,
+    subReports = [],
+    idx = schema.oneOf.length
+  var subReport
+
+  // first check and handle the case of polymporhic oneOf.
+  if (validateDiscriminator.call(this, report, schema, json)) {
+    return
+  }
+
+  while (idx--) {
+    subReport = new Report(report, {maxErrors: 1})
+    subReports.push(subReport)
+    if (ZSchemaValidator.validate.call(this, subReport, schema.oneOf[idx], json) === true) {
+      passes++
+    }
+  }
+  if (passes === 0) {
+    report.addError('ONE_OF_MISSING', undefined, subReports, schema)
+  } else if (passes > 1) {
+    report.addError('ONE_OF_MULTIPLE', null, null, schema)
+  }
+}
+
+function validateDiscriminator (report, schema, json) {
+  var basePolymorphicSchema = schema.oneOf.find(
+    s => s.__$refResolved && s.__$refResolved.discriminator !== undefined
+  )
+
+  // if none of the oneOf subschemas has a discriminator, we are not in a polymorphic oneOf.
+  if (!basePolymorphicSchema) {
+    return false
+  }
+  var discriminatorPropertyName = basePolymorphicSchema.__$refResolved.discriminator
+
+  // to conform to the Azure specs, we accept a lenient discriminator. if the type is missing in the
+  // payload we use the base class. Also if the type doesn't match anything, we use the base class.
+  var jsonDiscriminatorValue =
+    json[discriminatorPropertyName] ||
+    basePolymorphicSchema.__$refResolved.properties[discriminatorPropertyName].enum[0]
+
+  var schemaToValidate =
+    schema.oneOf.find(
+      s =>
+        s.__$refResolved &&
+        s.__$refResolved.properties[discriminatorPropertyName].enum[0] ===
+        jsonDiscriminatorValue
+    ) || basePolymorphicSchema
+
+  ZSchemaValidator.validate.call(this, report, schemaToValidate, json)
+  return true
+}
+
 function whatIs (what) {
   var to = typeof what;
 
@@ -118,3 +175,4 @@ function whatIs (what) {
 module.exports.enumValidator = enumValidator;
 module.exports.requiredPropertyValidator = requiredPropertyValidator;
 module.exports.typeValidator = typeValidator;
+module.exports.oneOf = oneOf;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "yasway",
-  "version": "1.5.14",
+  "version": "1.6.0",
   "description": "A library that simplifies Swagger integrations.",
   "main": "index.js",
   "types": "index.d.ts",
@@ -13,18 +13,18 @@
     "swagger"
   ],
   "author": {
-    "name": "Amar Zavery",
-    "email": "amzavery@microsoft.com",
-    "url": "https://github.com/amarzavery"
+    "name": "Microsoft Corporation",
+    "email": "azsdkteam@microsoft.com",
+    "url": "https://github.com/Azure/sway"
   },
   "bugs": {
-    "url": "https://github.com/amarzavery/sway/issues"
+    "url": "https://github.com/Azure/sway/issues"
   },
-  "homepage": "https://github.com/amarzavery/sway",
+  "homepage": "https://github.com/Azure/sway",
   "license": "MIT",
   "repository": {
     "type": "git",
-    "url": "git://github.com/amarzavery/sway.git"
+    "url": "git://github.com/Azure/sway.git"
   },
   "files": [
     "index.js",