Receive payment working.

TODO: Nested subscribe in Receive Payment in sales-home-component.ts should be refactored into something more readable.

bookie/src/app/sales/receive-payment/receive-payment-datasource.ts

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+import { DataSource } from '@angular/cdk/collections';
+import { Observable, of as observableOf } from 'rxjs';
+
+export class ReceivePaymentDatasource extends DataSource<{name: string, discount: number}> {
+
+  constructor(private data: {name: string, discount: number}[]) {
+    super();
+  }
+
+  connect(): Observable<{name: string, discount: number}[]> {
+    return observableOf(this.data);
+  }
+
+  disconnect() {
+  }
+}

bookie/src/app/sales/receive-payment/receive-payment.component.css

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+.right {
+  display: flex;
+  justify-content: flex-end;
+}
+.bold {
+  font-weight: bold;
+}

bookie/src/app/sales/receive-payment/receive-payment.component.html

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+<h2 mat-dialog-title>Receive Payment</h2>
+<mat-dialog-content>
+  <form [formGroup]="form" fxLayout="column">
+    <mat-table #table [dataSource]="dataSource" formArrayName="amounts">
+
+      <!-- Name Column -->
+      <ng-container matColumnDef="name">
+        <mat-header-cell *matHeaderCellDef class="bold">Amount</mat-header-cell>
+        <mat-cell *matCellDef="let row">{{row.name}}</mat-cell>
+        <mat-footer-cell *matFooterCellDef class="bold">Balance</mat-footer-cell>
+      </ng-container>
+
+      <!-- Discount Column -->
+      <ng-container matColumnDef="amount">
+        <mat-header-cell *matHeaderCellDef class="center bold" fxFlex>{{ amount | currency:'INR'}}</mat-header-cell>
+        <mat-cell *matCellDef="let row; let i = index" class="center" [formGroupName]="i" fxFlex>
+          <mat-form-field>
+            <input matInput type="number" formControlName="amount" autocomplete="off">
+          </mat-form-field>
+        </mat-cell>
+        <mat-footer-cell *matFooterCellDef class="bold">{{ balance | currency:'INR' }}</mat-footer-cell>
+      </ng-container>
+
+      <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
+      <mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row>
+      <mat-footer-row *matFooterRowDef="displayedColumns"></mat-footer-row>
+    </mat-table>
+  </form>
+</mat-dialog-content>
+<mat-dialog-actions align="end">
+  <button mat-button [mat-dialog-close]="false">Cancel</button>
+  <button mat-button (click)="accept()" color="primary" [disabled]="!!balance">Ok</button>
+</mat-dialog-actions>

bookie/src/app/sales/receive-payment/receive-payment.component.spec.ts

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

bookie/src/app/sales/receive-payment/receive-payment.component.ts

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+import { Component, Inject } from '@angular/core';
+import { MAT_DIALOG_DATA, MatDialogRef } from '@angular/material';
+import { FormArray, FormBuilder, FormGroup } from "@angular/forms";
+import { distinctUntilChanged } from "rxjs/operators";
+import { ReceivePaymentDatasource } from "./receive-payment-datasource";
+import { PrintType } from "../bills/bill";
+
+@Component({
+  selector: 'app-receive-payment',
+  templateUrl: './receive-payment.component.html',
+  styleUrls: ['./receive-payment.component.css']
+})
+export class ReceivePaymentComponent {
+  choices = {
+    REGULAR_BILL: [
+      {
+        id: 2,
+        name: "Cash",
+        amount: 0
+      },
+      {
+        id: 3,
+        name: "Credit Card",
+        amount: 0
+      },
+      {
+        id: 5,
+        name: "Bill To Company",
+        amount: 0
+      },
+      {
+        id: 6,
+        name: "Tip",
+        amount: 0
+      }
+    ]
+    ,
+    NO_CHARGE: [
+      {
+        id: 4,
+        name: "No Charge",
+        amount: 0
+      }
+    ],
+    STAFF: [
+      {
+        id: 10,
+        name: "Staff Account",
+        amount: 0
+      }
+    ]
+  };
+  type: PrintType;
+  amount: number;
+  balance: number;
+  form: FormGroup;
+  dataSource: ReceivePaymentDatasource;
+
+  displayedColumns = ['name', 'amount'];
+
+  constructor(
+    public dialogRef: MatDialogRef<ReceivePaymentComponent>,
+    private fb: FormBuilder,
+    @Inject(MAT_DIALOG_DATA) public data: {type: PrintType, amount: number}
+  ) {
+    this.createForm();
+    this.type = data.type;
+    this.amount = data.amount;
+    this.balance = data.amount;
+    this.form.setControl('amounts', this.fb.array(
+      this.choices[this.type].map(
+        x => this.fb.group({
+          name: [x.name],
+          amount: [""]
+        })
+      )
+    ));
+    this.dataSource = new ReceivePaymentDatasource(this.choices[this.type]);
+    this.listenToAmountChange();
+  }
+
+  createForm() {
+    this.form = this.fb.group({
+      amounts: ''
+    });
+  }
+
+  listenToAmountChange() {
+    const array = this.form.get('amounts') as FormArray;
+    this.choices[this.type].forEach(
+      (z, i) => array.controls[i].valueChanges.pipe(
+        distinctUntilChanged()
+      ).subscribe(x => {
+        this.choices[this.type].find(s => s.name == x.name).amount = (x.amount === "" ? 0 : parseInt(x.amount, 10));
+        this.balance = this.amount - this.choices[this.type].reduce((a, c) => a + c.amount, 0);
+      })
+    );
+  }
+
+
+  accept(): void {
+    this.dialogRef.close(this.choices[this.type]);
+  }
+}