Implement file repository

Author: rsaladocid

package-lock.json

@@ -10,13 +10,14 @@
     "test": "NODE_ENV=test jest",
     "test:unit": "NODE_ENV=test jest --watch",
     "test:features": "./node_modules/.bin/cucumber-js -p default",
-    "start": "NODE_ENV=production node dist/src/apps/mooc/server",
+    "start": "NODE_ENV=production node dist/src/apps/mooc_backend/server",
     "build": "npm run build:clean && npm run build:tsc && npm run build:di",
     "build:tsc": "tsc -p tsconfig.prod.json",
     "build:di": "copy 'src/**/*.yaml' dist/src",
     "build:clean": "rm -r dist; exit 0"
   },
   "dependencies": {
+    "@types/bson": "^4.0.0",
     "@types/compression": "^1.0.1",
     "@types/convict": "^4.2.1",
     "@types/errorhandler": "0.0.32",
@@ -25,6 +26,7 @@
     "@types/node": "~11.13.0",
     "@types/uuid": "^3.4.5",
     "body-parser": "^1.19.0",
+    "bson": "^4.0.2",
     "compression": "^1.7.4",
     "convict": "^5.1.0",
     "copy": "^0.3.2",

package.json

@@ -0,0 +1,20 @@
+import CourseRepository from '../domain/CourseRepository';
+import Course from '../domain/Course';
+import * as fs from 'fs';
+import BSON from 'bson';
+
+export default class FileCourseRepository implements CourseRepository {
+  private FILE_PATH = `${__dirname}/courses`;
+
+  save(course: Course): void | Promise<void> {
+    fs.writeFileSync(this.filePath(course.id), BSON.serialize(course));
+  }
+
+  search(id: string): Course {
+    return fs.existsSync(this.filePath(id)) ? BSON.deserialize(fs.readFileSync(this.filePath(id))) : null;
+  }
+
+  private filePath(id: string): string {
+    return `${this.FILE_PATH}.${id}.repo`;
+  }
+}

src/Mooc/Courses/infrastructure/FileCourseRepository.ts

@@ -0,0 +1,11 @@
+import Course from '../../../../src/Mooc/Courses/domain/Course';
+import FileCourseRepository from '../../../../src/Mooc/Courses/infrastructure/FileCourseRepository';
+
+describe('Save Course', () => {
+  it('should have a course', () => {
+    const repository = new FileCourseRepository();
+    const course = new Course('id', 'name', 'duration');
+
+    repository.save(course);
+  });
+});