Thomas Kaul
3 years ago
committed by
GitHub
parent
d5ba624403
commit
23f2ac472e
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<div class="container p-0">
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<div class="row">
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<div class="col-md-3">
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<form class="" [formGroup]="calculatorForm">
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<!--<mat-form-field appearance="outline">
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<input formControlName="principalInvestmentAmount" matInput />
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</mat-form-field>-->
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<mat-form-field appearance="outline" class="w-100">
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<mat-label i18n>Savings Rate</mat-label>
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<input
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formControlName="paymentPerPeriod"
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matInput
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step="100"
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type="number"
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/>
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<span class="ml-2" i18n matSuffix>{{ currency }} per month</span>
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</mat-form-field>
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<mat-form-field appearance="outline" class="w-100">
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<mat-label i18n>Investment Horizon</mat-label>
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<input formControlName="time" matInput type="number" />
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<span class="ml-2" i18n matSuffix>years</span>
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</mat-form-field>
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<mat-form-field appearance="outline" class="w-100">
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<mat-label i18n>Annual Interest Rate</mat-label>
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<input
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formControlName="annualInterestRate"
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matInput
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step="0.25"
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type="number"
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/>
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<span class="ml-2" i18n matSuffix>%</span>
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</mat-form-field>
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<gf-value
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label="Projected Total Amount"
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size="large"
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[currency]="currency"
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[isCurrency]="true"
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[locale]="locale"
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[value]="projectedTotalAmount"
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></gf-value>
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</form>
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</div>
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<div class="col-md-9 text-center">
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<div class="chart-container mb-4">
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<ngx-skeleton-loader
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*ngIf="isLoading"
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animation="pulse"
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[theme]="{
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height: '100%',
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width: '100%'
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}"
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></ngx-skeleton-loader>
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<canvas
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#chartCanvas
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class="h-100"
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[ngStyle]="{ display: isLoading ? 'none' : 'block' }"
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></canvas>
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</div>
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</div>
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</div>
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</div>
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@ -0,0 +1,11 @@
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:host {
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display: block;
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.chart-container {
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aspect-ratio: 16 / 9;
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ngx-skeleton-loader {
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height: 100%;
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}
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}
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}
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@ -0,0 +1,48 @@
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import { CommonModule } from '@angular/common';
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import { FormsModule, ReactiveFormsModule } from '@angular/forms';
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import { MatButtonModule } from '@angular/material/button';
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import { MatFormFieldModule } from '@angular/material/form-field';
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import { MatInputModule } from '@angular/material/input';
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import { NoopAnimationsModule } from '@angular/platform-browser/animations';
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import { baseCurrency, locale } from '@ghostfolio/common/config';
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import { Meta, Story, moduleMetadata } from '@storybook/angular';
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import { NgxSkeletonLoaderModule } from 'ngx-skeleton-loader';
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import { GfValueModule } from '../value';
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import { FireCalculatorComponent } from './fire-calculator.component';
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import { FireCalculatorService } from './fire-calculator.service';
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export default {
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title: 'FIRE Calculator',
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component: FireCalculatorComponent,
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decorators: [
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moduleMetadata({
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declarations: [FireCalculatorComponent],
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imports: [
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CommonModule,
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FormsModule,
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GfValueModule,
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MatButtonModule,
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MatFormFieldModule,
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MatInputModule,
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NgxSkeletonLoaderModule,
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NoopAnimationsModule,
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ReactiveFormsModule
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],
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providers: [FireCalculatorService]
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})
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]
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} as Meta<FireCalculatorComponent>;
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const Template: Story<FireCalculatorComponent> = (
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args: FireCalculatorComponent
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) => ({
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props: args
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});
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export const Simple = Template.bind({});
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Simple.args = {
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currency: baseCurrency,
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fireWealth: 0,
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locale: locale
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};
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import 'chartjs-adapter-date-fns';
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import {
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AfterViewInit,
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ChangeDetectionStrategy,
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ChangeDetectorRef,
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Component,
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Input,
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OnChanges,
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OnDestroy,
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ViewChild
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} from '@angular/core';
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import { FormBuilder, FormControl } from '@angular/forms';
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import { primaryColorRgb, secondaryColorRgb } from '@ghostfolio/common/config';
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import {
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BarController,
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BarElement,
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CategoryScale,
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Chart,
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LinearScale,
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Tooltip
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} from 'chart.js';
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import { FireCalculatorService } from './fire-calculator.service';
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import { Subject, takeUntil } from 'rxjs';
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import { transformTickToAbbreviation } from '@ghostfolio/common/helper';
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@Component({
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selector: 'gf-fire-calculator',
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changeDetection: ChangeDetectionStrategy.OnPush,
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templateUrl: './fire-calculator.component.html',
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styleUrls: ['./fire-calculator.component.scss']
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})
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export class FireCalculatorComponent
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implements AfterViewInit, OnChanges, OnDestroy
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{
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@Input() currency: string;
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@Input() deviceType: string;
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@Input() fireWealth: number;
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@Input() locale: string;
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@ViewChild('chartCanvas') chartCanvas;
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public calculatorForm = this.formBuilder.group({
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annualInterestRate: new FormControl(),
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paymentPerPeriod: new FormControl(),
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principalInvestmentAmount: new FormControl(),
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time: new FormControl()
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});
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public chart: Chart;
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public isLoading = true;
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public projectedTotalAmount: number;
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private unsubscribeSubject = new Subject<void>();
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/**
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* @constructor
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*/
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public constructor(
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private changeDetectorRef: ChangeDetectorRef,
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private fireCalculatorService: FireCalculatorService,
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private formBuilder: FormBuilder
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) {
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Chart.register(
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BarController,
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BarElement,
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CategoryScale,
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LinearScale,
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Tooltip
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);
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this.calculatorForm.setValue({
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annualInterestRate: 5,
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paymentPerPeriod: 500,
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principalInvestmentAmount: 0,
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time: 10
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});
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this.calculatorForm.valueChanges
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.pipe(takeUntil(this.unsubscribeSubject))
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.subscribe(() => {
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this.initialize();
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});
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}
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public ngAfterViewInit() {
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if (this.fireWealth >= 0) {
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setTimeout(() => {
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// Wait for the chartCanvas
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this.calculatorForm.patchValue({
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principalInvestmentAmount: this.fireWealth
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});
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this.calculatorForm.get('principalInvestmentAmount').disable();
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this.changeDetectorRef.markForCheck();
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});
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}
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}
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public ngOnChanges() {
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if (this.fireWealth >= 0) {
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setTimeout(() => {
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// Wait for the chartCanvas
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this.calculatorForm.patchValue({
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principalInvestmentAmount: this.fireWealth
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});
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this.calculatorForm.get('principalInvestmentAmount').disable();
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this.changeDetectorRef.markForCheck();
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});
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}
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}
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public ngOnDestroy() {
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this.chart?.destroy();
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this.unsubscribeSubject.next();
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this.unsubscribeSubject.complete();
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}
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private initialize() {
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this.isLoading = true;
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const chartData = this.getChartData();
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if (this.chartCanvas) {
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if (this.chart) {
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this.chart.data.labels = chartData.labels;
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this.chart.data.datasets[0].data = chartData.datasets[0].data;
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this.chart.data.datasets[1].data = chartData.datasets[1].data;
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this.chart.update();
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} else {
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this.chart = new Chart(this.chartCanvas.nativeElement, {
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data: chartData,
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options: {
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plugins: {
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tooltip: {
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callbacks: {
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label: (context) => {
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let label = context.dataset.label || '';
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if (label) {
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label += ': ';
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}
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if (context.parsed.y !== null) {
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label += new Intl.NumberFormat(this.locale, {
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currency: this.currency,
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currencyDisplay: 'code',
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style: 'currency'
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}).format(context.parsed.y);
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}
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return label;
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}
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}
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}
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},
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responsive: true,
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scales: {
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x: {
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grid: {
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display: false
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},
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stacked: true
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},
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y: {
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display: this.deviceType !== 'mobile',
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grid: {
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display: false
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},
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stacked: true,
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ticks: {
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callback: (value: number) => {
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return transformTickToAbbreviation(value);
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}
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}
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}
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}
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},
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type: 'bar'
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});
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}
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}
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this.isLoading = false;
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}
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private getChartData() {
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const currentYear = new Date().getFullYear();
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const labels = [];
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// Principal investment amount
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const P: number =
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this.calculatorForm.get('principalInvestmentAmount').value || 0;
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// Payment per period
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const PMT: number = parseFloat(
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this.calculatorForm.get('paymentPerPeriod').value
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);
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// Annual interest rate
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const r: number = this.calculatorForm.get('annualInterestRate').value / 100;
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// Time
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const t: number = parseFloat(this.calculatorForm.get('time').value);
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for (let year = currentYear; year < currentYear + t; year++) {
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labels.push(year);
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}
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const datasetInterest = {
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backgroundColor: `rgb(${secondaryColorRgb.r}, ${secondaryColorRgb.g}, ${secondaryColorRgb.b})`,
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data: [],
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label: 'Interest'
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};
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const datasetPrincipal = {
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backgroundColor: `rgb(${primaryColorRgb.r}, ${primaryColorRgb.g}, ${primaryColorRgb.b})`,
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data: [],
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label: 'Principal'
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};
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for (let period = 1; period <= t; period++) {
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const { interest, principal, totalAmount } =
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this.fireCalculatorService.calculateCompoundInterest({
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P,
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period,
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PMT,
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r
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});
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datasetPrincipal.data.push(principal.toNumber());
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datasetInterest.data.push(interest.toNumber());
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if (period === t - 1) {
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this.projectedTotalAmount = totalAmount.toNumber();
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}
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}
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return {
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labels,
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datasets: [datasetPrincipal, datasetInterest]
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};
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}
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}
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@ -0,0 +1,28 @@
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import { CommonModule } from '@angular/common';
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import { NgModule } from '@angular/core';
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import { FormsModule, ReactiveFormsModule } from '@angular/forms';
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import { MatButtonModule } from '@angular/material/button';
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import { MatFormFieldModule } from '@angular/material/form-field';
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import { MatInputModule } from '@angular/material/input';
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import { NgxSkeletonLoaderModule } from 'ngx-skeleton-loader';
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import { GfValueModule } from '../value';
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import { FireCalculatorComponent } from './fire-calculator.component';
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import { FireCalculatorService } from './fire-calculator.service';
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@NgModule({
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declarations: [FireCalculatorComponent],
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exports: [FireCalculatorComponent],
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imports: [
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CommonModule,
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FormsModule,
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GfValueModule,
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MatButtonModule,
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MatFormFieldModule,
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MatInputModule,
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NgxSkeletonLoaderModule,
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ReactiveFormsModule
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],
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providers: [FireCalculatorService]
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})
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export class GfFireCalculatorModule {}
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@ -0,0 +1,49 @@
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import { Injectable } from '@angular/core';
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import Big from 'big.js';
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@Injectable()
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export class FireCalculatorService {
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private readonly COMPOUND_PERIOD = 12;
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private readonly CONTRIBUTION_PERIOD = 12;
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/**
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* @constructor
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*/
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public constructor() {}
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public calculateCompoundInterest({
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P,
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period,
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PMT,
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r
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}: {
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P: number;
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period: number;
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PMT: number;
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r: number;
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}) {
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let interest = new Big(0);
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const principal = new Big(P).plus(
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new Big(PMT).mul(this.CONTRIBUTION_PERIOD).mul(period)
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);
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let totalAmount = principal;
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if (r) {
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const compoundInterestForPrincipal = new Big(1)
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.plus(new Big(r).div(this.COMPOUND_PERIOD))
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.pow(new Big(this.COMPOUND_PERIOD).mul(period).toNumber());
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const compoundInterest = new Big(P).mul(compoundInterestForPrincipal);
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const contributionInterest = new Big(
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new Big(PMT).mul(compoundInterestForPrincipal.minus(1))
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).div(new Big(r).div(this.CONTRIBUTION_PERIOD));
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interest = compoundInterest.plus(contributionInterest).minus(principal);
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totalAmount = compoundInterest.plus(contributionInterest);
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}
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return {
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interest,
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principal,
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totalAmount
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};
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}
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}
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@ -0,0 +1 @@
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export * from './fire-calculator.module';
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