Feature: Tax Regimes are added so that different bills with different series can be printed for Different regimes such as VAT and GST

Chore: Model relationships updated to make them simpler
Chore: Bill printing majorly refactored for it

Due to the sheer depth of the changes. There can be showstoppers. Please test it carefully

bookie/src/app/regimes/regime-detail/regime-detail.component.css

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+.right-align {
+  text-align: right;
+}

bookie/src/app/regimes/regime-detail/regime-detail.component.html

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+<mat-card class="flex-auto lg:max-w-[50%]">
+  <mat-card-header>
+    <mat-card-title>Regime</mat-card-title>
+  </mat-card-header>
+  <mat-card-content>
+    <form [formGroup]="form" class="flex flex-col">
+      <div class="flex flex-row justify-around content-start items-start">
+        <mat-form-field class="flex-auto">
+          <mat-label>Name</mat-label>
+          <input matInput #nameElement formControlName="name" (keyup.enter)="save()" />
+        </mat-form-field>
+      </div>
+      <div class="flex flex-row justify-around content-start items-start">
+        <mat-form-field class="flex-auto">
+          <mat-label>Header</mat-label>
+          <input matInput formControlName="header" />
+        </mat-form-field>
+      </div>
+      <div class="flex flex-row justify-around content-start items-start">
+        <mat-form-field class="flex-auto">
+          <mat-label>Prefix</mat-label>
+          <input matInput formControlName="prefix" />
+        </mat-form-field>
+      </div>
+    </form>
+  </mat-card-content>
+  <mat-card-actions>
+    <button
+      mat-raised-button
+      [disabled]="item.isFixture"
+      color="primary"
+      class="mr-5"
+      (click)="save()"
+    >
+      Save
+    </button>
+    <button
+      mat-raised-button
+      [disabled]="item.isFixture"
+      color="warn"
+      (click)="confirmDelete()"
+      *ngIf="!!item.id"
+    >
+      Delete
+    </button>
+  </mat-card-actions>
+</mat-card>

bookie/src/app/regimes/regime-detail/regime-detail.component.spec.ts

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+import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
+
+import { RegimeDetailComponent } from './regime-detail.component';
+
+describe('RegimeDetailComponent', () => {
+  let component: RegimeDetailComponent;
+  let fixture: ComponentFixture<RegimeDetailComponent>;
+
+  beforeEach(waitForAsync(() => {
+    TestBed.configureTestingModule({
+      declarations: [RegimeDetailComponent],
+    }).compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(RegimeDetailComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

bookie/src/app/regimes/regime-detail/regime-detail.component.ts

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+import { AfterViewInit, Component, ElementRef, OnInit, ViewChild } from '@angular/core';
+import { FormControl, FormGroup } from '@angular/forms';
+import { MatDialog } from '@angular/material/dialog';
+import { ActivatedRoute, Router } from '@angular/router';
+
+import { Regime } from '../../core/regime';
+import { ToasterService } from '../../core/toaster.service';
+import { ConfirmDialogComponent } from '../../shared/confirm-dialog/confirm-dialog.component';
+import { RegimeService } from '../regime.service';
+
+@Component({
+  selector: 'app-regime-detail',
+  templateUrl: './regime-detail.component.html',
+  styleUrls: ['./regime-detail.component.css'],
+})
+export class RegimeDetailComponent implements OnInit, AfterViewInit {
+  @ViewChild('nameElement', { static: true }) nameElement?: ElementRef;
+  form: FormGroup<{
+    name: FormControl<string>;
+    header: FormControl<string>;
+    prefix: FormControl<string>;
+  }>;
+
+  item: Regime = new Regime();
+
+  constructor(
+    private route: ActivatedRoute,
+    private router: Router,
+    private dialog: MatDialog,
+    private toaster: ToasterService,
+    private ser: RegimeService,
+  ) {
+    // Create form
+    this.form = new FormGroup({
+      name: new FormControl<string>('', { nonNullable: true }),
+      header: new FormControl<string>('', { nonNullable: true }),
+      prefix: new FormControl<string>('', { nonNullable: true }),
+    });
+  }
+
+  ngOnInit() {
+    this.route.data.subscribe((value) => {
+      const data = value as { item: Regime };
+      this.showItem(data.item);
+    });
+  }
+
+  showItem(item: Regime) {
+    this.item = item;
+    this.form.setValue({
+      name: this.item.name ?? '',
+      header: this.item.header ?? '',
+      prefix: this.item.prefix ?? '',
+    });
+  }
+
+  ngAfterViewInit() {
+    setTimeout(() => {
+      if (this.nameElement !== undefined) {
+        this.nameElement.nativeElement.focus();
+      }
+    }, 0);
+  }
+
+  save() {
+    this.ser.saveOrUpdate(this.getItem()).subscribe(
+      () => {
+        this.toaster.show('Success', '');
+        this.router.navigateByUrl('/regimes');
+      },
+      (error) => {
+        this.toaster.show('Error', error);
+      },
+    );
+  }
+
+  delete() {
+    this.ser.delete(this.item.id as number).subscribe(
+      () => {
+        this.toaster.show('Success', '');
+        this.router.navigateByUrl('/regimes');
+      },
+      (error) => {
+        this.toaster.show('Error', error);
+      },
+    );
+  }
+
+  confirmDelete(): void {
+    const dialogRef = this.dialog.open(ConfirmDialogComponent, {
+      width: '250px',
+      data: { title: 'Delete Regime?', content: 'Are you sure? This cannot be undone.' },
+    });
+
+    dialogRef.afterClosed().subscribe((result: boolean) => {
+      if (result) {
+        this.delete();
+      }
+    });
+  }
+
+  getItem(): Regime {
+    const formModel = this.form.value;
+    this.item.name = formModel.name ?? '';
+    this.item.header = formModel.header ?? '';
+    this.item.prefix = formModel.prefix ?? '';
+    return this.item;
+  }
+}

bookie/src/app/regimes/regime-list-resolver.service.spec.ts

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+import { inject, TestBed } from '@angular/core/testing';
+
+import { RegimeListResolver } from './regime-list-resolver.service';
+
+describe('RegimeListResolverService', () => {
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [RegimeListResolver],
+    });
+  });
+
+  it('should be created', inject([RegimeListResolver], (service: RegimeListResolver) => {
+    expect(service).toBeTruthy();
+  }));
+});

bookie/src/app/regimes/regime-list-resolver.service.ts

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+import { Injectable } from '@angular/core';
+import { Resolve } from '@angular/router';
+import { Observable } from 'rxjs';
+
+import { Regime } from '../core/regime';
+
+import { RegimeService } from './regime.service';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class RegimeListResolver implements Resolve<Regime[]> {
+  constructor(private ser: RegimeService) {}
+
+  resolve(): Observable<Regime[]> {
+    return this.ser.list();
+  }
+}

bookie/src/app/regimes/regime-list/regime-list-datasource.ts

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+import { DataSource } from '@angular/cdk/collections';
+import { Observable, of as observableOf } from 'rxjs';
+
+import { Regime } from '../../core/regime';
+
+export class RegimeListDataSource extends DataSource<Regime> {
+  constructor(public data: Regime[]) {
+    super();
+  }
+
+  connect(): Observable<Regime[]> {
+    return observableOf(this.data);
+  }
+
+  disconnect() {}
+}

bookie/src/app/regimes/regime-list/regime-list.component.html

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+<mat-card>
+  <mat-card-header>
+    <mat-card-title-group>
+      <mat-card-title>Regimes</mat-card-title>
+      <a mat-button [routerLink]="['/regimes', 'new']">
+        <mat-icon>add_box</mat-icon>
+        Add
+      </a>
+    </mat-card-title-group>
+  </mat-card-header>
+  <mat-card-content>
+    <mat-table #table [dataSource]="dataSource" aria-label="Elements">
+      <!-- Name Column -->
+      <ng-container matColumnDef="name">
+        <mat-header-cell *matHeaderCellDef>Name</mat-header-cell>
+        <mat-cell *matCellDef="let row"
+          ><a [routerLink]="['/regimes', row.id]">{{ row.name }}</a></mat-cell
+        >
+      </ng-container>
+
+      <!-- Header Column -->
+      <ng-container matColumnDef="header">
+        <mat-header-cell *matHeaderCellDef>Header</mat-header-cell>
+        <mat-cell *matCellDef="let row">{{ row.header }}</mat-cell>
+      </ng-container>
+
+      <!-- Prefix Column -->
+      <ng-container matColumnDef="prefix">
+        <mat-header-cell *matHeaderCellDef>Prefix</mat-header-cell>
+        <mat-cell *matCellDef="let row">{{ row.prefix }}</mat-cell>
+      </ng-container>
+
+      <!-- Is Fixture Column -->
+      <ng-container matColumnDef="isFixture">
+        <mat-header-cell *matHeaderCellDef>Is Fixture?</mat-header-cell>
+        <mat-cell *matCellDef="let row">{{ row.isFixture }}</mat-cell>
+      </ng-container>
+
+      <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
+      <mat-row *matRowDef="let row; columns: displayedColumns"></mat-row>
+    </mat-table>
+  </mat-card-content>
+</mat-card>

bookie/src/app/regimes/regime-list/regime-list.component.spec.ts

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+import { ComponentFixture, fakeAsync, TestBed } from '@angular/core/testing';
+
+import { RegimeListComponent } from './regime-list.component';
+
+describe('RegimeListComponent', () => {
+  let component: RegimeListComponent;
+  let fixture: ComponentFixture<RegimeListComponent>;
+
+  beforeEach(fakeAsync(() => {
+    TestBed.configureTestingModule({
+      declarations: [RegimeListComponent],
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(RegimeListComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  }));
+
+  it('should compile', () => {
+    expect(component).toBeTruthy();
+  });
+});

bookie/src/app/regimes/regime-list/regime-list.component.ts

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+import { Component, OnInit } from '@angular/core';
+import { ActivatedRoute } from '@angular/router';
+
+import { Regime } from '../../core/regime';
+
+import { RegimeListDataSource } from './regime-list-datasource';
+
+@Component({
+  selector: 'app-regime-list',
+  templateUrl: './regime-list.component.html',
+  styleUrls: ['./regime-list.component.css'],
+})
+export class RegimeListComponent implements OnInit {
+  list: Regime[] = [];
+  dataSource: RegimeListDataSource = new RegimeListDataSource(this.list);
+  /** Columns displayed in the table. Columns IDs can be added, removed, or reordered. */
+  displayedColumns = ['name', 'header', 'prefix', 'isFixture'];
+
+  constructor(private route: ActivatedRoute) {}
+
+  ngOnInit() {
+    this.route.data.subscribe((value) => {
+      const data = value as { list: Regime[] };
+      this.list = data.list;
+    });
+    this.dataSource = new RegimeListDataSource(this.list);
+  }
+}

bookie/src/app/regimes/regime-resolver.service.spec.ts

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+import { inject, TestBed } from '@angular/core/testing';
+
+import { RegimeResolver } from './regime-resolver.service';
+
+describe('RegimeResolver', () => {
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [RegimeResolver],
+    });
+  });
+
+  it('should be created', inject([RegimeResolver], (service: RegimeResolver) => {
+    expect(service).toBeTruthy();
+  }));
+});

bookie/src/app/regimes/regime-resolver.service.ts

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+import { Injectable } from '@angular/core';
+import { ActivatedRouteSnapshot, Resolve } from '@angular/router';
+import { Observable } from 'rxjs';
+
+import { Regime } from '../core/regime';
+
+import { RegimeService } from './regime.service';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class RegimeResolver implements Resolve<Regime> {
+  constructor(private ser: RegimeService) {}
+
+  resolve(route: ActivatedRouteSnapshot): Observable<Regime> {
+    const id = route.paramMap.get('id');
+    return this.ser.get(id ? +id : null);
+  }
+}

bookie/src/app/regimes/regime.service.spec.ts

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+import { inject, TestBed } from '@angular/core/testing';
+
+import { RegimeService } from './regime.service';
+
+describe('RegimeService', () => {
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [RegimeService],
+    });
+  });
+
+  it('should be created', inject([RegimeService], (service: RegimeService) => {
+    expect(service).toBeTruthy();
+  }));
+});

bookie/src/app/regimes/regime.service.ts

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+import { HttpClient, HttpHeaders } from '@angular/common/http';
+import { Injectable } from '@angular/core';
+import { Observable } from 'rxjs';
+import { catchError } from 'rxjs/operators';
+
+import { ErrorLoggerService } from '../core/error-logger.service';
+import { Regime } from '../core/regime';
+
+const httpOptions = {
+  headers: new HttpHeaders({ 'Content-Type': 'application/json' }),
+};
+const url = '/api/regimes';
+const serviceName = 'RegimeService';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class RegimeService {
+  constructor(private http: HttpClient, private log: ErrorLoggerService) {}
+
+  get(id: number | null): Observable<Regime> {
+    const getUrl: string = id === null ? url : `${url}/${id}`;
+    return this.http
+      .get<Regime>(getUrl)
+      .pipe(catchError(this.log.handleError(serviceName, `get id=${id}`))) as Observable<Regime>;
+  }
+
+  list(): Observable<Regime[]> {
+    return this.http
+      .get<Regime[]>(`${url}/list`)
+      .pipe(catchError(this.log.handleError(serviceName, 'list'))) as Observable<Regime[]>;
+  }
+
+  save(regime: Regime): Observable<Regime> {
+    return this.http
+      .post<Regime>(url, regime, httpOptions)
+      .pipe(catchError(this.log.handleError(serviceName, 'save'))) as Observable<Regime>;
+  }
+
+  update(regime: Regime): Observable<Regime> {
+    return this.http
+      .put<Regime>(`${url}/${regime.id}`, regime, httpOptions)
+      .pipe(catchError(this.log.handleError(serviceName, 'update'))) as Observable<Regime>;
+  }
+
+  saveOrUpdate(regime: Regime): Observable<Regime> {
+    if (!regime.id) {
+      return this.save(regime);
+    }
+    return this.update(regime);
+  }
+
+  delete(id: number): Observable<Regime> {
+    return this.http
+      .delete<Regime>(`${url}/${id}`, httpOptions)
+      .pipe(catchError(this.log.handleError(serviceName, 'delete'))) as Observable<Regime>;
+  }
+}

bookie/src/app/regimes/regimes-routing.module.spec.ts

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+import { RegimesRoutingModule } from './regimes-routing.module';
+
+describe('RegimesRoutingModule', () => {
+  let regimesRoutingModule: RegimesRoutingModule;
+
+  beforeEach(() => {
+    regimesRoutingModule = new RegimesRoutingModule();
+  });
+
+  it('should create an instance', () => {
+    expect(regimesRoutingModule).toBeTruthy();
+  });
+});

bookie/src/app/regimes/regimes-routing.module.ts

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+import { CommonModule } from '@angular/common';
+import { NgModule } from '@angular/core';
+import { RouterModule, Routes } from '@angular/router';
+
+import { AuthGuard } from '../auth/auth-guard.service';
+
+import { RegimeDetailComponent } from './regime-detail/regime-detail.component';
+import { RegimeListComponent } from './regime-list/regime-list.component';
+import { RegimeListResolver } from './regime-list-resolver.service';
+import { RegimeResolver } from './regime-resolver.service';
+
+const regimesRoutes: Routes = [
+  {
+    path: '',
+    component: RegimeListComponent,
+    canActivate: [AuthGuard],
+    data: {
+      permission: 'Regimes',
+    },
+    resolve: {
+      list: RegimeListResolver,
+    },
+  },
+  {
+    path: 'new',
+    component: RegimeDetailComponent,
+    canActivate: [AuthGuard],
+    data: {
+      permission: 'Regimes',
+    },
+    resolve: {
+      item: RegimeResolver,
+    },
+  },
+  {
+    path: ':id',
+    component: RegimeDetailComponent,
+    canActivate: [AuthGuard],
+    data: {
+      permission: 'Regimes',
+    },
+    resolve: {
+      item: RegimeResolver,
+    },
+  },
+];
+
+@NgModule({
+  imports: [CommonModule, RouterModule.forChild(regimesRoutes)],
+  exports: [RouterModule],
+  providers: [RegimeListResolver, RegimeResolver],
+})
+export class RegimesRoutingModule {}

bookie/src/app/regimes/regimes.module.spec.ts

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+import { RegimesModule } from './regimes.module';
+
+describe('RegimesModule', () => {
+  let regimesModule: RegimesModule;
+
+  beforeEach(() => {
+    regimesModule = new RegimesModule();
+  });
+
+  it('should create an instance', () => {
+    expect(regimesModule).toBeTruthy();
+  });
+});

bookie/src/app/regimes/regimes.module.ts

@@ -0,0 +1,31 @@
+import { CdkTableModule } from '@angular/cdk/table';
+import { CommonModule } from '@angular/common';
+import { NgModule } from '@angular/core';
+import { ReactiveFormsModule } from '@angular/forms';
+import { MatButtonModule } from '@angular/material/button';
+import { MatCardModule } from '@angular/material/card';
+import { MatIconModule } from '@angular/material/icon';
+import { MatInputModule } from '@angular/material/input';
+import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
+import { MatTableModule } from '@angular/material/table';
+
+import { RegimeDetailComponent } from './regime-detail/regime-detail.component';
+import { RegimeListComponent } from './regime-list/regime-list.component';
+import { RegimesRoutingModule } from './regimes-routing.module';
+
+@NgModule({
+  imports: [
+    CommonModule,
+    CdkTableModule,
+    MatButtonModule,
+    MatCardModule,
+    MatIconModule,
+    MatInputModule,
+    MatProgressSpinnerModule,
+    MatTableModule,
+    ReactiveFormsModule,
+    RegimesRoutingModule,
+  ],
+  declarations: [RegimeListComponent, RegimeDetailComponent],
+})
+export class RegimesModule {}