feat: add umpire CRUD service

src/app/services/umpire.service.spec.ts

@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { UmpireService } from './umpire.service';
+
+describe('Umpire', () => {
+  let service: UmpireService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(UmpireService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

src/app/services/umpire.service.ts

@@ -0,0 +1,61 @@
+import { Injectable } from '@angular/core';
+import { db } from 'db';
+import { liveQuery } from 'dexie';
+import { from } from 'rxjs';
+import { Umpire } from '../../../db';
+import { toSignal } from '@angular/core/rxjs-interop';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class UmpireService {
+  /**
+   * Reactive signal with all umpires
+   */
+  readonly umpires = toSignal(
+    from(liveQuery(() => db.umpires.orderBy('lastName').toArray())),
+    {
+      initialValue: []
+    }
+  );
+
+  /**
+   * Create
+   */
+  async create(umpire: Omit<Umpire, 'id'>): Promise<number> {
+    return await db.umpires.add({
+      ...umpire
+    } as Umpire);
+  }
+
+  /**
+   * Read one
+   */
+  async getById(id: number): Promise<Umpire | undefined> {
+    return await db.umpires.get(id);
+  }
+
+  /**
+   * Update
+   */
+  async update(
+    id: number,
+    changes: Partial<Omit<Umpire, 'id'>>
+  ): Promise<number> {
+    return await db.umpires.update(id, changes);
+  }
+
+  /**
+   * Delete
+   */
+  async delete(id: number): Promise<void> {
+    await db.umpires.delete(id);
+  }
+
+  /**
+   * Delete all
+   */
+  async clear(): Promise<void> {
+    await db.umpires.clear();
+  }
+}