Crud groups

Created by: hihubbIe

src/groups/dao/groups.dao.ts

+import { Injectable } from '@nestjs/common';
+import { InjectModel } from '@nestjs/mongoose';
+import { Model } from 'mongoose';
+import { from, map, Observable } from 'rxjs';
+import { CreateGroupDto } from '../dto/create-group.dto';
+import { UpdateGroupDto } from '../dto/update-group.dto';
+import { Group } from '../schemas/group.schema';
+
+@Injectable()
+export class GroupsDao {
+  constructor(
+    @InjectModel(Group.name)
+    private readonly _groupModel: Model<Group>,
+  ) {}
+
+  find = (): Observable<Group[]> =>
+    from(this._groupModel.find({})).pipe(map((groups) => [].concat(groups)));
+
+  findById = (id: string): Observable<Group | void> =>
+    from(this._groupModel.findById(id));
+
+  save = (group: CreateGroupDto): Observable<Group> =>
+    from(new this._groupModel(group).save());
+
+  findByIdAndUpdate = (
+    id: string,
+    group: UpdateGroupDto,
+  ): Observable<Group | void> =>
+    from(
+      this._groupModel.findByIdAndUpdate(id, group, {
+        new: true,
+        runValidators: true,
+      }),
+    );
+
+  findByIdAndRemove = (id: string): Observable<Group | void> =>
+    from(this._groupModel.findByIdAndRemove(id));
+}