feature: primera version

.gitattributes

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+* text=auto eol=lf

.gitignore

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+node_modules/

.vscode/settings.json

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+{
+    "typescript.tsdk": "node_modules/typescript/lib"
+}

LICENSE.md

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+MIT License
+
+Copyright (c) 2020 Luis Diego
+
+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.

README.md

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+```
+libs/
+    @micro/logger
+    @micro/kernel
+modules/
+    countries
+        domain
+            entities
+            exceptions
+            aggregation-roots
+            value-objects
+            events
+            repositories-interfaces
+        infraestructure
+            repositories
+            logger
+            dtos *
+            mappers
+        application
+            commands
+            queries
+            handlers
+            uses-cases
+        interfaces
+            rest
+                controllers
+                routers
+                server.js
+            graphl
+                queries
+                mutations
+                server.js
+            console
+                commands
+                cli.js
+        app
+            app.js
+    pokemon
+    customers
+    products
+    orders
+```

libs/kernel/.editorconfig

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+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+max_line_length = off
+trim_trailing_whitespace = false

libs/kernel/.gitignore

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+node_modules/
+reports/
+lib/

libs/kernel/.npmignore

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+# Directories
+/src
+/test
+
+# Others
+.babelrc
+.editorconfig
+.eslintignore
+.eslintrc.yml
+.gitattributes
+.gitignore
+.npmignore
+.prettierrc
+babel.config.js
+tsconfig.json
+webpack.config.js

libs/kernel/.prettierrc

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+{
+  "endOfLine": "auto",
+  "semi": true,
+  "singleQuote": true,
+  "tabWidth": 2,
+  "trailingComma": "es5"
+}

libs/kernel/LICENSE.md

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+MIT License
+
+Copyright (c) 2020 Luis Diego
+
+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.

libs/kernel/jest.config.json

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+{
+  "transform": {
+    "^.+\\.tsx?$": "ts-jest"
+  },
+  "testRegex": "(/__tests__/.*|(\\.|/)(test|spec))\\.ts?$",
+  "testEnvironment": "node",
+  "moduleFileExtensions": [
+    "ts",
+    "js"
+  ],
+  "collectCoverage": true,
+  "coverageReporters": [
+    "json",
+    "text",
+    "html"
+  ],
+  "coverageDirectory": "reports"
+}

libs/kernel/package.json

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+{
+  "name": "@micro/kernel",
+  "version": "1.0.0",
+  "description": "Micro kernel for Microservices using DDD",
+  "author": {
+    "name": "Luis Diego",
+    "email": "[email protected]",
+    "url": "http://github.com/ldiego73"
+  },
+  "license": "MIT",
+  "main": "lib/index.js",
+  "types": "lib/index.d.ts",
+  "files": [
+    "lib/"
+  ],
+  "scripts": {
+    "clean": "rimraf lib",
+    "prebuild": "yarn clean",
+    "build": "webpack",
+    "test": "jest --passWithNoTests"
+  },
+  "dependencies": {
+    "@types/uuid": "^7.0.3",
+    "fast-deep-equal": "^3.1.1",
+    "uuid": "^8.0.0"
+  },
+  "devDependencies": {
+    "@types/jest": "^25.2.1",
+    "@types/node": "^13.13.5",
+    "glob": "^7.1.6",
+    "jest": "^26.0.1",
+    "rimraf": "^3.0.2",
+    "ts-jest": "^25.5.0",
+    "ts-loader": "^7.0.2",
+    "typescript": "^3.8.3",
+    "webpack": "^4.43.0",
+    "webpack-cli": "^3.3.11",
+    "webpack-node-externals": "^1.7.2"
+  }
+}

libs/kernel/src/application/index.ts

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+export * from './use-case';
+export * from './use-case.error';
+export * from './transform';

libs/kernel/src/application/transform.ts

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+export interface Transform<T, U> {
+  toDto(t: T): U;
+  toColletion?(t: T[]): U[];
+}

libs/kernel/src/application/use-case.error.ts

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+import { Failure } from '../result';
+
+export interface UseCaseError {
+  message: string;
+  error: any;
+}
+
+export class UseCaseUnexpectedError extends Failure<UseCaseError> {
+  public constructor(error: any) {
+    super({
+      message: 'An unexpected error occurred.',
+      error,
+    });
+  }
+
+  public static create(error: any): UseCaseUnexpectedError {
+    return new UseCaseUnexpectedError(error);
+  }
+}

libs/kernel/src/application/use-case.ts

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+export interface UseCase<Request, Response> {
+  execute(request?: Request): Promise<Response> | Response;
+}

libs/kernel/src/domain/aggregate-root.ts

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+import { Entity } from './entity';
+import { UniqueEntityId } from './unique-entity-id';
+
+export abstract class AggregateRoot<T> extends Entity<T> {
+  get id(): UniqueEntityId {
+    return this._id;
+  }
+}

libs/kernel/src/domain/domain.error.ts

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+export interface DomainError {
+  message: string;
+  error?: any;
+}

libs/kernel/src/domain/entity.ts

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+import { UniqueEntityId } from './unique-entity-id';
+
+const isEntity = (v: any): v is Entity<any> => {
+  return v instanceof Entity;
+};
+
+export abstract class Entity<T> {
+  protected readonly _id: UniqueEntityId;
+  public readonly props: T;
+
+  constructor(props: T, id?: UniqueEntityId) {
+    this._id = id ?? new UniqueEntityId();
+    this.props = props;
+  }
+
+  equals(object?: Entity<T>): boolean {
+    if (object === null || object === undefined) {
+      return false;
+    }
+
+    if (this === object) {
+      return true;
+    }
+
+    /* istanbul ignore next */
+    if (!isEntity(object)) {
+      return false;
+    }
+
+    return this._id.equals(object._id);
+  }
+}

libs/kernel/src/domain/identifier.ts

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+export class Identifier<T> {
+  constructor(private value: T) {
+    this.value = value;
+  }
+
+  equals(id?: Identifier<T>): boolean {
+    if (id === null || id === undefined) {
+      return false;
+    }
+
+    /* istanbul ignore next */
+    if (!(id instanceof this.constructor)) {
+      return false;
+    }
+
+    return id.toValue() === this.value;
+  }
+
+  toString() {
+    return String(this.value);
+  }
+
+  toValue(): T {
+    return this.value;
+  }
+}

libs/kernel/src/domain/index.ts

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+export * from './aggregate-root';
+export * from './entity';
+export * from './identifier';
+export * from './unique-entity-id';
+export * from './value-object';
+export * from './domain.error';

libs/kernel/src/domain/unique-entity-id.ts

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+import { v4 as uuid } from 'uuid';
+import { Identifier } from './identifier';
+
+export class UniqueEntityId extends Identifier<string | number> {
+  constructor(id?: string | number) {
+    super(id ?? uuid());
+  }
+}

libs/kernel/src/domain/value-object.ts

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+import equal from 'fast-deep-equal';
+
+interface ValueObjectProps {
+  [index: string]: any;
+}
+
+export abstract class ValueObject<T extends ValueObjectProps> {
+  public readonly props: T;
+
+  constructor(props: T) {
+    this.props = Object.freeze(props);
+  }
+
+  public equals(vo?: ValueObject<T>): boolean {
+    if (vo === null || vo === undefined) {
+      return false;
+    }
+
+    /* istanbul ignore next */
+    if (vo.props === undefined) {
+      return false;
+    }
+    return equal(this.props, vo.props);
+  }
+}

libs/kernel/src/index.ts

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+export * from './domain';
+export * from './infraestructure';
+export * from './application';
+export * from './result';

libs/kernel/src/infraestructure/index.ts

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+export * from './repository';
+export * from './mapper';

libs/kernel/src/infraestructure/mapper.ts

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+export interface Mapper<T> {
+  toDomain(raw: any): T;
+  toPersistence(t: T): any;
+}

libs/kernel/src/infraestructure/repository.ts

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+export interface Repository<T> {
+  findAll(): Promise<T[]>;
+
+  save(t: T): Promise<void>;
+  create(t: T): Promise<void>;
+  update(t: T): Promise<void>;
+}