Moved to a "cleaner" directory structure

ref #11

src/models/entities/UserAction.ts

@@ -0,0 +1,52 @@
+import { PrimaryGeneratedColumn, Column, OneToMany, Entity, ManyToOne } from "typeorm";
+import {
+  IsInt,
+  IsNotEmpty,
+  IsOptional,
+  IsString,
+} from "class-validator";
+import { User } from './User';
+
+/**
+ * Defines the UserAction interface.
+*/
+@Entity()
+export class UserAction {
+  /**
+   * Autogenerated unique id (primary key).
+   */
+  @PrimaryGeneratedColumn()
+  @IsOptional()
+  @IsInt()
+  id: number;
+
+  /**
+   * user
+   */
+  @ManyToOne(() => User, user => user.actions)
+  user: User
+
+  /**
+   * The actions's target (e.g. Track#2)
+   */
+  @Column()
+  @IsNotEmpty()
+  @IsString()
+  target: string;
+
+  /**
+   * The actions's action (e.g. UPDATE)
+   */
+  @Column()
+  @IsNotEmpty()
+  @IsString()
+  action: string;
+
+  /**
+   * The description of change (before-> after; e.g. distance:15->17)
+   */
+  @Column({ nullable: true })
+  @IsOptional()
+  @IsString()
+  changed: string;
+}