refactor validation (json-schema mostly)

Change json-schema validation to be able to push in different schemas
Tweak semantic validation to allow overriding the validators that are run

Author: ponelat

src/plugins/json-schema-validator/index.js

@@ -0,0 +1,165 @@
+// JSON-Schema ( draf04 ) validator
+import JsonSchemaWebWorker from "./validator.worker.js"
+import PromiseWorker from "promise-worker"
+import debounce from "lodash/debounce"
+import swagger2Schema from "./swagger2-schema.js"
+import oas3Schema from "./oas3-schema"
+
+// Lazily created promise worker
+let _promiseWorker
+const promiseWorker = () => {
+  if(!_promiseWorker)
+    _promiseWorker = new PromiseWorker(new JsonSchemaWebWorker())
+  return _promiseWorker
+}
+
+export const addSchema = (schema, schemaPath=[]) => () => {
+  promiseWorker().postMessage({
+    type: "add-schema",
+    payload: {
+      schemaPath,
+      schema
+    }
+  })
+}
+
+// Figure out what schema we need to use ( we're making provision to be able to do sub-schema validation later on)
+// ...for now we just pick which base schema to use (eg: openapi-2-0, openapi-3.0, domain-2-0, etc)
+export const getSchemaBasePath = () => ({ specSelectors }) => {
+  // Eg: openapiDomain-3.0
+  //     openapi-3.0
+  // later on... ['openapi-2.0', 'paths', 'get']
+  const isOAS3 = specSelectors.isOAS3 ? specSelectors.isOAS3() : false
+  const isSwagger2 = specSelectors.isSwagger2 ? specSelectors.isSwagger2() : false
+  const isAmbiguousVersion = isOAS3 && isSwagger2
+
+  // Refuse to handle ambiguity
+  if(isAmbiguousVersion)
+    return []
+
+  if(isSwagger2)
+    return ["openapi-2.0"]
+
+  if(isOAS3)
+    return ["openapi-3.0"]
+
+}
+
+
+export const setup = () => ({jsonSchemaValidatorActions}) => {
+  // Add schemas , once off
+  jsonSchemaValidatorActions.addSchema(swagger2Schema, ["openapi-2.0"])
+  jsonSchemaValidatorActions.addSchema(oas3Schema, ["openapi-3.0"])
+}
+
+
+export const validate = ({spec, path=[], ...rest}) => system => {
+  // stagger clearing errors, in case there is another debounced validation
+  // run happening, which can occur when the user's typing cadence matches
+  // the latency of validation
+  // TODO: instead of using a timeout, be aware of any pending validation
+  // promises, and use them to schedule error clearing.
+  setTimeout(() => {
+    system.errActions.clear({
+      source: system.jsonSchemaValidatorSelectors.errSource()
+    })
+  }, 50)
+  system.jsonSchemaValidatorActions.validateDebounced({spec, path, ...rest})
+}
+
+// Create a debounced validate, that is lazy
+let _debValidate
+export const validateDebounced = (...args) => system => {
+  // Lazily create one...
+  if(!_debValidate) {
+    _debValidate = debounce((...args) => {
+      system.jsonSchemaValidatorActions.validateImmediate(...args)
+    }, 200)
+  }
+  return _debValidate(...args)
+}
+
+export const validateImmediate = ({spec, path=[]}) => system => {
+  // schemaPath refers to type of schema, and later might refer to sub-schema
+  const baseSchemaPath = system.jsonSchemaValidatorSelectors.getSchemaBasePath()
+
+  // No base path? Then we're unable to do anything...
+  if(!baseSchemaPath.length)
+    throw new Error("Ambiguous schema path, unable to run validation")
+
+  return system.jsonSchemaValidatorActions.validateWithBaseSchema({spec, path: [...baseSchemaPath, ...path]})
+}
+
+export const validateWithBaseSchema = ({spec, path=[]}) => system => {
+  const errSource = system.jsonSchemaValidatorSelectors.errSource()
+
+  return promiseWorker().postMessage({
+    type: "validate",
+    payload: {
+      jsSpec: spec,
+      specStr: system.specSelectors.specStr(),
+      schemaPath: path,
+      source: errSource,
+    }
+  }).then(({results, path}) => {
+    system.jsonSchemaValidatorActions.handleResults(null, {results, path})
+  }, err => {
+    system.jsonSchemaValidatorActions.handleResults(err, {})
+  })
+}
+
+export const handleResults = (err, {results}) => system => {
+  if(err) {
+    // Something bad happened with validation.
+    throw err
+  }
+
+  system.errActions.clear({
+    source: system.jsonSchemaValidatorSelectors.errSource()
+  })
+
+  if(!Array.isArray(results)) {
+    results = [results]
+  }
+
+  // Filter out anything funky
+  results = results.filter(val => typeof val === "object" && val !== null)
+
+  if(results.length) {
+    system.errActions.newSpecErrBatch(results)
+  }
+}
+
+export default function() {
+  return {
+    statePlugins: {
+      jsonSchemaValidator: {
+        actions: {
+          addSchema,
+          validate,
+          handleResults,
+          validateDebounced,
+          validateImmediate,
+          validateWithBaseSchema,
+          setup,
+        },
+        selectors: {
+          getSchemaBasePath,
+          errSource() {
+            // Used to identify the errors generated by this plugin
+            return "json-schema"
+          }
+        }
+      },
+      spec: {
+        wrapActions: {
+          validateSpec: (ori,system) => (...args) => {
+            ori(...args)
+            const [ spec, path ] = args
+            system.jsonSchemaValidatorActions.validate({spec,path})
+          }
+        },
+      }
+    }
+  }
+}

src/plugins/validate-json-schema/structural-validation/oas3-schema.js renamed to src/plugins/json-schema-validator/oas3-schema.js

@@ -0,0 +1,24 @@
+import "src/polyfills"
+import registerPromiseWorker from "promise-worker/register"
+import Validator from "./validator"
+
+const validator = new Validator()
+
+registerPromiseWorker(({ type, payload }) => {
+
+  if(type == "add-schema") {
+    const { schema, schemaPath } = payload
+    validator.addSchema(schema, schemaPath)
+    return
+  }
+
+  if(type == "validate") {
+    const { jsSpec, specStr, schemaPath, source } = payload
+    let validationResults = validator.validate({
+      jsSpec, specStr, schemaPath, source
+    })
+
+    return { results: validationResults }
+  }
+
+})