N21 1212 remove user from group (#4454)

* remove user from group:
* remove emptx groups

apps/server/src/modules/group/domain/group.spec.ts

@@ -0,0 +1,138 @@
+import { groupFactory, roleFactory, userDoFactory } from '@shared/testing';
+
+import { ObjectId } from 'bson';
+import { RoleReference, UserDO } from '@shared/domain';
+import { Group } from './group';
+import { GroupUser } from './group-user';
+
+describe('Group (Domain Object)', () => {
+	describe('removeUser', () => {
+		describe('when the user is in the group', () => {
+			const setup = () => {
+				const user: UserDO = userDoFactory.buildWithId();
+				const groupUser1 = new GroupUser({
+					userId: user.id as string,
+					roleId: new ObjectId().toHexString(),
+				});
+				const groupUser2 = new GroupUser({
+					userId: new ObjectId().toHexString(),
+					roleId: new ObjectId().toHexString(),
+				});
+				const group: Group = groupFactory.build({
+					users: [groupUser1, groupUser2],
+				});
+
+				return {
+					user,
+					groupUser1,
+					groupUser2,
+					group,
+				};
+			};
+
+			it('should remove the user', () => {
+				const { user, group, groupUser1 } = setup();
+
+				group.removeUser(user);
+
+				expect(group.users).not.toContain(groupUser1);
+			});
+
+			it('should keep all other users', () => {
+				const { user, group, groupUser2 } = setup();
+
+				group.removeUser(user);
+
+				expect(group.users).toContain(groupUser2);
+			});
+		});
+
+		describe('when the user is not in the group', () => {
+			const setup = () => {
+				const user: UserDO = userDoFactory.buildWithId();
+				const groupUser2 = new GroupUser({
+					userId: new ObjectId().toHexString(),
+					roleId: new ObjectId().toHexString(),
+				});
+				const group: Group = groupFactory.build({
+					users: [groupUser2],
+				});
+
+				return {
+					user,
+					groupUser2,
+					group,
+				};
+			};
+
+			it('should do nothing', () => {
+				const { user, group, groupUser2 } = setup();
+
+				group.removeUser(user);
+
+				expect(group.users).toEqual([groupUser2]);
+			});
+		});
+
+		describe('when the group is empty', () => {
+			const setup = () => {
+				const user: UserDO = userDoFactory.buildWithId();
+				const group: Group = groupFactory.build({ users: [] });
+
+				return {
+					user,
+					group,
+				};
+			};
+
+			it('should stay empty', () => {
+				const { user, group } = setup();
+
+				group.removeUser(user);
+
+				expect(group.users).toEqual([]);
+			});
+		});
+	});
+
+	describe('isEmpty', () => {
+		describe('when no users in group exist', () => {
+			const setup = () => {
+				const group: Group = groupFactory.build({ users: [] });
+
+				return {
+					group,
+				};
+			};
+
+			it('should return true', () => {
+				const { group } = setup();
+
+				const isEmpty = group.isEmpty();
+
+				expect(isEmpty).toEqual(true);
+			});
+		});
+
+		describe('when users in group exist', () => {
+			const setup = () => {
+				const externalUserId = 'externalUserId';
+				const role: RoleReference = roleFactory.buildWithId();
+				const user: UserDO = userDoFactory.buildWithId({ roles: [role], externalId: externalUserId });
+				const group: Group = groupFactory.build({ users: [{ userId: user.id as string, roleId: role.id }] });
+
+				return {
+					group,
+				};
+			};
+
+			it('should return false', () => {
+				const { group } = setup();
+
+				const isEmpty = group.isEmpty();
+
+				expect(isEmpty).toEqual(false);
+			});
+		});
+	});
+});

apps/server/src/modules/group/domain/group.ts

@@ -1,4 +1,4 @@
-import { EntityId, ExternalSource } from '@shared/domain';
+import { EntityId, ExternalSource, type UserDO } from '@shared/domain';
 import { AuthorizableObject, DomainObject } from '@shared/domain/domain-object';
 import { GroupTypes } from './group-types';
 import { GroupUser } from './group-user';
@@ -37,4 +37,12 @@ export class Group extends DomainObject<GroupProps> {
 	get organizationId(): string | undefined {
 		return this.props.organizationId;
 	}
+
+	removeUser(user: UserDO): void {
+		this.props.users = this.props.users.filter((groupUser: GroupUser): boolean => groupUser.userId !== user.id);
+	}
+
+	isEmpty(): boolean {
+		return this.props.users.length === 0;
+	}
 }

apps/server/src/modules/group/repo/group.repo.spec.ts

@@ -1,8 +1,16 @@
 import { EntityManager, ObjectId } from '@mikro-orm/mongodb';
 import { Test, TestingModule } from '@nestjs/testing';
-import { ExternalSource, SchoolEntity } from '@shared/domain';
+import { ExternalSource, SchoolEntity, UserDO, User } from '@shared/domain';
 import { MongoMemoryDatabaseModule } from '@shared/infra/database';
-import { cleanupCollections, groupEntityFactory, groupFactory, schoolFactory } from '@shared/testing';
+import {
+	cleanupCollections,
+	groupEntityFactory,
+	groupFactory,
+	roleFactory,
+	schoolFactory,
+	userDoFactory,
+	userFactory,
+} from '@shared/testing';
 import { Group, GroupProps, GroupTypes, GroupUser } from '../domain';
 import { GroupEntity, GroupEntityTypes } from '../entity';
 import { GroupRepo } from './group.repo';
@@ -82,6 +90,62 @@ describe('GroupRepo', () => {
 		});
 	});
 
+	describe('findByUser', () => {
+		describe('when the user has groups', () => {
+			const setup = async () => {
+				const userEntity: User = userFactory.buildWithId();
+				const user: UserDO = userDoFactory.build({ id: userEntity.id });
+				const groups: GroupEntity[] = groupEntityFactory.buildListWithId(3, {
+					users: [{ user: userEntity, role: roleFactory.buildWithId() }],
+				});
+
+				const otherGroups: GroupEntity[] = groupEntityFactory.buildListWithId(2);
+
+				await em.persistAndFlush([userEntity, ...groups, ...otherGroups]);
+				em.clear();
+
+				return {
+					user,
+					groups,
+				};
+			};
+
+			it('should return the groups', async () => {
+				const { user, groups } = await setup();
+
+				const result: Group[] = await repo.findByUser(user);
+
+				expect(result.map((group) => group.id).sort((a, b) => a.localeCompare(b))).toEqual(
+					groups.map((group) => group.id).sort((a, b) => a.localeCompare(b))
+				);
+			});
+		});
+
+		describe('when the user has no groups exists', () => {
+			const setup = async () => {
+				const userEntity: User = userFactory.buildWithId();
+				const user: UserDO = userDoFactory.build({ id: userEntity.id });
+
+				const otherGroups: GroupEntity[] = groupEntityFactory.buildListWithId(2);
+
+				await em.persistAndFlush([userEntity, ...otherGroups]);
+				em.clear();
+
+				return {
+					user,
+				};
+			};
+
+			it('should return an empty array', async () => {
+				const { user } = await setup();
+
+				const result: Group[] = await repo.findByUser(user);
+
+				expect(result).toHaveLength(0);
+			});
+		});
+	});
+
 	describe('findClassesForSchool', () => {
 		describe('when groups of type class for the school exist', () => {
 			const setup = async () => {

apps/server/src/modules/group/repo/group.repo.ts

@@ -1,6 +1,7 @@
-import { EntityManager } from '@mikro-orm/mongodb';
+import { EntityManager, ObjectId } from '@mikro-orm/mongodb';
 import { Injectable } from '@nestjs/common';
 import { EntityId } from '@shared/domain/types';
+import { type UserDO } from '@shared/domain';
 import { Group, GroupProps } from '../domain';
 import { GroupEntity, GroupEntityProps, GroupEntityTypes } from '../entity';
 import { GroupDomainMapper } from './group-domain.mapper';
@@ -42,6 +43,20 @@ export class GroupRepo {
 		return domainObject;
 	}
 
+	public async findByUser(user: UserDO): Promise<Group[]> {
+		const entities: GroupEntity[] = await this.em.find(GroupEntity, {
+			users: { user: new ObjectId(user.id) },
+		});
+
+		const domainObjects = entities.map((entity) => {
+			const props: GroupProps = GroupDomainMapper.mapEntityToDomainObjectProperties(entity);
+
+			return new Group(props);
+		});
+
+		return domainObjects;
+	}
+
 	public async findClassesForSchool(schoolId: EntityId): Promise<Group[]> {
 		const entities: GroupEntity[] = await this.em.find(GroupEntity, {
 			type: GroupEntityTypes.CLASS,

apps/server/src/modules/group/service/group.service.spec.ts

@@ -2,7 +2,8 @@ import { createMock, DeepMocked } from '@golevelup/ts-jest';
 import { ObjectId } from '@mikro-orm/mongodb';
 import { Test, TestingModule } from '@nestjs/testing';
 import { NotFoundLoggableException } from '@shared/common/loggable-exception';
-import { groupFactory } from '@shared/testing';
+import { groupFactory, userDoFactory } from '@shared/testing';
+import { UserDO } from '@shared/domain';
 import { Group } from '../domain';
 import { GroupRepo } from '../repo';
 import { GroupService } from './group.service';
@@ -120,6 +121,50 @@ describe('GroupService', () => {
 		});
 	});
 
+	describe('findByUser', () => {
+		describe('when groups with the user exists', () => {
+			const setup = () => {
+				const user: UserDO = userDoFactory.buildWithId();
+				const groups: Group[] = groupFactory.buildList(2);
+
+				groupRepo.findByUser.mockResolvedValue(groups);
+
+				return {
+					user,
+					groups,
+				};
+			};
+
+			it('should return the groups', async () => {
+				const { user, groups } = setup();
+
+				const result: Group[] = await service.findByUser(user);
+
+				expect(result).toEqual(groups);
+			});
+		});
+
+		describe('when no groups with the user exists', () => {
+			const setup = () => {
+				const user: UserDO = userDoFactory.buildWithId();
+
+				groupRepo.findByUser.mockResolvedValue([]);
+
+				return {
+					user,
+				};
+			};
+
+			it('should return empty array', async () => {
+				const { user } = setup();
+
+				const result: Group[] = await service.findByUser(user);
+
+				expect(result).toEqual([]);
+			});
+		});
+	});
+
 	describe('findClassesForSchool', () => {
 		describe('when the school has groups of type class', () => {
 			const setup = () => {

apps/server/src/modules/group/service/group.service.ts

@@ -1,6 +1,6 @@
 import { Injectable } from '@nestjs/common';
 import { NotFoundLoggableException } from '@shared/common/loggable-exception';
-import { EntityId } from '@shared/domain';
+import { EntityId, type UserDO } from '@shared/domain';
 import { AuthorizationLoaderServiceGeneric } from '@src/modules/authorization';
 import { Group } from '../domain';
 import { GroupRepo } from '../repo';
@@ -31,6 +31,12 @@ export class GroupService implements AuthorizationLoaderServiceGeneric<Group> {
 		return group;
 	}
 
+	public async findByUser(user: UserDO): Promise<Group[]> {
+		const groups: Group[] = await this.groupRepo.findByUser(user);
+
+		return groups;
+	}
+
 	public async findClassesForSchool(schoolId: EntityId): Promise<Group[]> {
 		const group: Group[] = await this.groupRepo.findClassesForSchool(schoolId);