authentication module done

libs/common/src/modules/abstract/dtos/abstract.dto.ts

@@ -0,0 +1,13 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { AbstractEntity } from '../entities/abstract.entity';
+
+export class AbstractDto {
+  @ApiProperty({ format: 'uuid' })
+  readonly uuid: string;
+
+  constructor(abstract: AbstractEntity, options?: { excludeFields?: boolean }) {
+    if (!options?.excludeFields) {
+      this.uuid = abstract.uuid;
+    }
+  }
+}

libs/common/src/modules/abstract/dtos/index.ts

@@ -0,0 +1 @@
+export * from './abstract.dto'

libs/common/src/modules/abstract/entities/abstract.entity.ts

@@ -0,0 +1,47 @@
+import { Exclude } from 'class-transformer';
+import {
+  Column,
+  CreateDateColumn,
+  Generated,
+  PrimaryGeneratedColumn,
+  UpdateDateColumn,
+} from 'typeorm';
+
+import { AbstractDto } from '../dtos';
+import { Constructor } from '@app/common/util/types';
+
+export abstract class AbstractEntity<
+  T extends AbstractDto = AbstractDto,
+  O = never
+> {
+  @PrimaryGeneratedColumn('increment')
+  @Exclude()
+  public id: number;
+
+  @Column()
+  @Generated('uuid')
+  public uuid: string;
+
+  @CreateDateColumn({ type: 'timestamp' })
+  @Exclude()
+  public createdAt: Date;
+
+  @UpdateDateColumn({ type: 'timestamp' })
+  @Exclude()
+  public updatedAt: Date;
+
+  private dtoClass: Constructor<T, [AbstractEntity, O?]>;
+
+  toDto(options?: O): T {
+    const dtoClass = this.dtoClass;
+
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+    if (!dtoClass) {
+      throw new Error(
+        `You need to use @UseDto on class (${this.constructor.name}) be able to call toDto function`
+      );
+    }
+
+    return new this.dtoClass(this, options);
+  }
+}