Implemented new Permission system on the DB side.

ref #22

src/models/entities/Permission.ts

@@ -1,12 +1,11 @@
 import {
   IsInt,
-  IsNotEmpty,
-
-  IsString
+  IsNotEmpty
 } from "class-validator";
-import { Column, Entity, OneToMany, PrimaryGeneratedColumn } from "typeorm";
-import { User } from './User';
-import { UserGroup } from './UserGroup';
+import { Column, Entity, ManyToOne, PrimaryGeneratedColumn } from "typeorm";
+import { PermissionAction } from '../enums/PermissionAction';
+import { PermissionTarget } from '../enums/PermissionTargets';
+import { Principal } from './Principal';
 /**
  * Defines the Permission interface.
 */
@@ -20,30 +19,27 @@ export abstract class Permission {
   id: number;
 
   /**
-   * users
+   * The permissions principal
    */
-  @OneToMany(() => User, user => user.permissions, { nullable: true })
-  users: User[]
-
-  /**
-   * groups
-   */
-  @OneToMany(() => UserGroup, group => group.permissions, { nullable: true })
-  groups: UserGroup[]
+  @ManyToOne(() => Principal, principal => principal.permissions)
+  principal: Principal[]
 
   /**
    * The target
    */
-  @Column()
+  @Column({
+    type: 'simple-enum',
+    enum: PermissionTarget
+  })
   @IsNotEmpty()
-  @IsString()
-  target: string;
+  target: PermissionTarget;
 
   /**
    * The action type
    */
-  @Column()
-  @IsNotEmpty()
-  @IsString()
-  action: string;
+  @Column({
+    type: 'simple-enum',
+    enum: PermissionAction
+  })
+  action: PermissionAction;
 }