feat(schema): Initial version of schema definitions and resolvers

_templates/package/new/README.md.t

@@ -5,7 +5,7 @@ to: packages/<%= name %>/README.md
 # @feathersjs/<%= name %>
 
 [![CI](https://github.com/feathersjs/feathers/workflows/CI/badge.svg)](https://github.com/feathersjs/feathers/actions?query=workflow%3ACI)
-[![Dependency Status](https://img.shields.io/david/feathersjs/feathers.svg?style=flat-square&path=packages/socketio)](https://david-dm.org/feathersjs/feathers?path=packages/<%= name %>)
+[![Dependency Status](https://img.shields.io/david/feathersjs/feathers.svg?style=flat-square&path=packages/<%= name %>)](https://david-dm.org/feathersjs/feathers?path=packages/<%= name %>)
 [![Download Status](https://img.shields.io/npm/dm/@feathersjs/<%= name %>.svg?style=flat-square)](https://www.npmjs.com/package/@feathersjs/<%= name %>)
 
 > <%= description %>

packages/memory/src/index.ts

@@ -21,7 +21,7 @@ const _select = (data: any, params: any, ...args: any[]) => {
   return base(JSON.parse(JSON.stringify(data)));
 };
 
-export class Service<T = any, D = Partial<any>> extends AdapterService<T, D> implements InternalServiceMethods<T> {
+export class Service<T = any, D = Partial<T>> extends AdapterService<T, D> implements InternalServiceMethods<T> {
   options: MemoryServiceOptions;
   store: MemoryServiceStore<T>;
   _uId: number;

packages/schema/LICENSE

@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2021 Feathers
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

packages/schema/README.md

@@ -0,0 +1,23 @@
+# @feathersjs/schema
+
+[![CI](https://github.com/feathersjs/feathers/workflows/CI/badge.svg)](https://github.com/feathersjs/feathers/actions?query=workflow%3ACI)
+[![Dependency Status](https://img.shields.io/david/feathersjs/feathers.svg?style=flat-square&path=packages/socketio)](https://david-dm.org/feathersjs/feathers?path=packages/schema)
+[![Download Status](https://img.shields.io/npm/dm/@feathersjs/schema.svg?style=flat-square)](https://www.npmjs.com/package/@feathersjs/schema)
+
+> A common data schema definition format
+
+## Installation
+
+```
+npm install @feathersjs/schema --save
+```
+
+## Documentation
+
+Refer to the [Feathers documentation](https://docs.feathersjs.com) for more details.
+
+## License
+
+Copyright (c) 2021 [Feathers contributors](https://github.com/feathersjs/feathers/graphs/contributors)
+
+Licensed under the [MIT license](LICENSE).

packages/schema/package.json

@@ -0,0 +1,67 @@
+{
+  "name": "@feathersjs/schema",
+  "description": "A common data schema definition format",
+  "version": "0.0.0",
+  "homepage": "https://feathersjs.com",
+  "main": "lib/",
+  "keywords": [
+    "feathers",
+    "feathers-plugin"
+  ],
+  "license": "MIT",
+  "funding": {
+    "type": "github",
+    "url": "https://github.com/sponsors/daffl"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/feathersjs/feathers.git"
+  },
+  "author": {
+    "name": "Feathers contributors",
+    "email": "hello@feathersjs.com",
+    "url": "https://feathersjs.com"
+  },
+  "contributors": [],
+  "bugs": {
+    "url": "https://github.com/feathersjs/feathers/issues"
+  },
+  "engines": {
+    "node": ">= 12"
+  },
+  "files": [
+    "CHANGELOG.md",
+    "LICENSE",
+    "README.md",
+    "src/**",
+    "lib/**",
+    "*.d.ts",
+    "*.js"
+  ],
+  "scripts": {
+    "prepublish": "npm run compile",
+    "compile": "shx rm -rf lib/ && tsc",
+    "test": "mocha --config ../../.mocharc.json --recursive test/**.test.ts test/**/*.test.ts"
+  },
+  "directories": {
+    "lib": "lib"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "dependencies": {
+    "@feathersjs/errors": "^5.0.0-pre.9",
+    "@feathersjs/feathers": "^5.0.0-pre.9",
+    "ajv": "^8.6.2",
+    "json-schema": "^0.3.0",
+    "json-schema-to-ts": "^1.6.4"
+  },
+  "devDependencies": {
+    "@feathersjs/memory": "^5.0.0-pre.9",
+    "@types/mocha": "^9.0.0",
+    "@types/node": "^16.6.1",
+    "mocha": "^9.0.3",
+    "shx": "^0.3.3",
+    "typescript": "^4.3.5"
+  }
+}

packages/schema/src/hooks.ts

@@ -0,0 +1,117 @@
+import { HookContext, NextFunction } from '@feathersjs/feathers';
+import { BadRequest } from '../../errors/lib';
+import { Resolver } from './resolver';
+import { Schema } from './schema';
+
+const getContext = (context: HookContext) => {
+  return {
+    ...context,
+    params: {
+      ...context.params,
+      query: {}
+    }
+  }
+}
+
+export const resolveQuery = <T> (resolver: Resolver<T, HookContext>) =>
+  async (context: HookContext, next: NextFunction) => {
+    const ctx = getContext(context);
+    const data = context?.params?.query || {};
+    const query = await resolver.resolve(data, ctx, {
+      originalContext: context
+    });
+
+    context.params = {
+      ...context.params,
+      query
+    }
+
+    return next();
+  };
+
+export const resolveData = <T> (resolver: Resolver<T, HookContext>) =>
+  async (context: HookContext, next: NextFunction) => {
+    const ctx = getContext(context);
+    const data = context.data;
+    const status = {
+      originalContext: context
+    };
+
+    if (Array.isArray(data)) {
+      context.data = await Promise.all(data.map(current =>
+        resolver.resolve(current, ctx, status)
+      ));
+    } else {
+      context.data = await resolver.resolve(data, ctx, status);
+    }
+
+    return next();
+  };
+
+export const resolveResult = <T> (resolver: Resolver<T, HookContext>) =>
+  async (context: HookContext, next: NextFunction) => {
+    const { $resolve: properties, ...query } = context.params?.query || {};
+    const { resolve } = context.params;
+    const status = {
+      originalContext: context,
+      ...resolve,
+      properties
+    };
+
+    context.params = {
+      ...context.params,
+      query
+    }
+
+    await next();
+
+    const ctx = getContext(context);
+    const data = context.method === 'find' && context.result.data
+      ? context.result.data
+      : context.result;
+
+    if (Array.isArray(data)) {
+      context.result = await Promise.all(data.map(current =>
+        resolver.resolve(current, ctx, status)
+      ));
+    } else {
+      context.result = await resolver.resolve(data, ctx, status);
+    }
+  };
+
+export const validateQuery = (schema: Schema<any>) =>
+  async (context: HookContext, next: NextFunction) => {
+    const data = context?.params?.query || {};
+
+    try {
+      const query = await schema.validate(data);
+
+      context.params = {
+        ...context.params,
+        query
+      }
+
+      return next();
+    } catch (error: any) {
+      throw (error.ajv ? new BadRequest(error.message, error.errors) : error);
+    }
+  };
+
+export const validateData = (schema: Schema<any>) =>
+  async (context: HookContext, next: NextFunction) => {
+    const data = context.data;
+
+    try {
+      if (Array.isArray(data)) {
+        context.data = await Promise.all(data.map(current =>
+          schema.validate(current)
+        ));
+      } else {
+        context.data = await schema.validate(data);
+      }
+    } catch (error: any) {
+      throw (error.ajv ? new BadRequest(error.message, error.errors) : error);
+    }
+
+    return next();
+  };

packages/schema/src/index.ts

@@ -0,0 +1,14 @@
+import { ResolverStatus  } from './resolver';
+
+export * from './schema';
+export * from './resolver';
+export * from './hooks';
+export * from './query';
+
+export type Infer<S extends { _type: any }> = S['_type'];
+
+declare module '@feathersjs/feathers/lib/declarations' {
+  interface Params {
+    resolve?: ResolverStatus<any, HookContext>;
+  }
+}

packages/schema/src/query.ts

@@ -0,0 +1,34 @@
+import { JSONSchema } from 'json-schema-to-ts';
+
+export const queryProperty = <T extends JSONSchema> (definition: T) => ({
+  oneOf: [
+    definition,
+    {
+      type: 'object',
+      additionalProperties: false,
+      properties: {
+        $gt: definition,
+        $gte: definition,
+        $lt: definition,
+        $lte: definition,
+        $ne: definition,
+        $in: {
+          type: 'array',
+          items: definition
+        },
+        $nin: {
+          type: 'array',
+          items: definition
+        }
+      }
+    }
+  ]
+} as const);
+
+export const queryArray = <T extends readonly string[]> (fields: T) => ({
+  type: 'array',
+  items: {
+    type: 'string',
+    enum: fields
+  }
+} as const);