FoodLoop-Web/src/app/panels/pie-panel.component.ts

import { Component, OnInit, Input, Output, EventEmitter } from '@angular/core';
import { CurrencyPipe } from '@angular/common';
import { ApiService } from '../providers/api-service';
import { CustPiesService } from '../providers/cust-pies.service';
import { DataType } from '../shared/data-types.enum';
import { ChartData } from '../_interfaces/chart-data';
import * as moment from 'moment';
import 'rxjs/add/operator/map';

@Component({
  selector: 'panel-pie',
  templateUrl: 'pie-panel.component.html',
})
export class PiePanel implements OnInit {

  public chartType = 'doughnut';
  public chartLegend = true;
  public doughnutChartDataLocal: number[] = [];
  public doughnutChartLabelsLocal: string[] = [];
  public doughnutChartDataCategory: number[] = [];
  public doughnutChartLabelsCategory: string[] = [];

  public doughtnutChartOptionsCategory:any = {
    tooltips: {
      callbacks: {
        label: (tooltip, data) => {
          return this.tooltipLabelCallback(tooltip, data);
        },
      },
    },
  }

  dayList: any[] = [];
  valueList: number[] = [];
  myWeek1: any;
  myWeek2: any;
  myWeek3: any;
  myWeek4: any;

  weekList1 = [];

  public purchaseNotEssential: number;
  public purchaseEssential: number;
  public showEssentialBarChart = false;
  public showCategoryBarChart = false;
  public showCategoryDoughnutChart = false;

  public barChartDataEssential:any[]=[
    {data: 0, label: 'Essential', stack: '1'},
    {data: 0, label: 'Non-Essential', stack: '1'},
  ];
  public barChartLabelsEssential:string[] = ['All Purchases'];
  public barChartOptionsEssential:any = {
      responsive: true,
      scales:{
          xAxes:[{
              stacked:true
          }],
          yAxes:[{
              stacked:true
          }]
      }
    };
  public barChartTypeEssential:string = 'horizontalBar';

  public barChartOptionsCategory:any = {
    scaleShowVerticalLines: false,
    responsive: true,
    scales: {
      yAxes: [{
        ticks: {
          beginAtZero: true,
          callback: label => `£${label}`
        }
      }]
    },
    tooltips: {
      callbacks: {
        label: (tooltip, data) => {
          return this.tooltipLabelCallback(tooltip, data);
        },
      },
    },
  };
  public barChartTypeCategory:string = 'bar';
  public barChartLegendCategory:boolean = false;
  public barChartDataCategory:any[]=[
    {data: [], label: 'Series A'},
  ];
  public barChartLabelsCategory:string[] = [];

  //Old

  // public mainChartElements = 7;

  constructor(
    private api: ApiService,
    private pieService: CustPiesService,
    private currencyPipe: CurrencyPipe,
  ) {
    this.setDate();
    this.pieService.getPie().subscribe(
      result => {
        this.setWeekData(result);
        this.setChartData(result.data.local_all, result.data.cat_total);
        this.purchaseEssential = result.data.essentials.purchase_no_essential_total;
        this.purchaseNotEssential = result.data.essentials.purchase_no_total - this.purchaseEssential;
        this.barChartDataEssential = [
          {data: [this.purchaseEssential], label: 'Essential', stack: '1'},
          {data: [this.purchaseNotEssential], label: 'Non-Essential', stack: '1'},
        ];
        this.showEssentialBarChart = true;

      },
      error => {
        console.log('Retrieval Error');
        console.log( error._body );
      }
    );
  }

  public ngOnInit(): void {

  }

  private setChartData(dataLocal: any, dataCat: any) {
    this.doughnutChartDataLocal = Object.keys(dataLocal).map(key => dataLocal[key]);
    this.barChartLabelsCategory = Object.keys(dataCat);
    let barChartDataCategoryInitial = Object.keys(dataCat).map(key => dataCat[key]);
    this.barChartDataCategory = [
      {data: barChartDataCategoryInitial, label: 'Series A'},
    ];
    let doughnutChartDataCategoryInitial = this.weekList1.map(function(a) {return a.value;});
    this.doughnutChartDataCategory = [
      {data: doughnutChartDataCategoryInitial, label: 'Series A'},
    ];
    // setTimeout is currently a workaround for ng2-charts labels
    setTimeout(() => this.doughnutChartLabelsLocal = Object.keys(dataLocal), 0);
    setTimeout(() => this.doughnutChartLabelsCategory = this.weekList1.map(function(a) {return a.category;}), 0);
    this.showCategoryDoughnutChart = true;
    this.showCategoryBarChart = true;
  }

  private setDate () {
    this.myWeek1 = moment().startOf('isoWeek').format('YYYY-MM-DD');
  }

  private setWeekData (data: any) {
    function prop<T, K extends keyof T>(obj: T, key: K) {
      return obj[key];
    }
    this.weekList1 = prop(data.data.categories, this.myWeek1);
  }

  // convert Hex to RGBA
  public convertHex(hex: string, opacity: number) {
    hex = hex.replace('#', '');
    const r = parseInt(hex.substring(0, 2), 16);
    const g = parseInt(hex.substring(2, 4), 16);
    const b = parseInt(hex.substring(4, 6), 16);

    const rgba = 'rgba(' + r + ', ' + g + ', ' + b + ', ' + opacity / 100 + ')';
    return rgba;
  }

  // events
  public chartClicked(e: any): void {
    console.log(e);
  }

  public chartHovered(e: any): void {
    console.log(e);
  }

  private prop<T, K extends keyof T>(obj: T, key: K) {
    return obj[key];
  }

  private tooltipLabelCallback(tooltipItem: any, data: any) {
    var dataset = data.datasets[tooltipItem.datasetIndex];
    var value = dataset.data[tooltipItem.index];
    return this.currencyPipe.transform(value, 'GBP', 'symbol', '1.2-2');
    return value || '0';
  }

}