ag-grid: Custom Header component - get sort order

<!DOCTYPE html>
 <html lang="en">
<head>
    <title>Angular 2 ag-Grid starter</title>
    <script>document.write('<base href="' + document.location + '" />');</script>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <style> html, body { margin: 0; padding: 0; height: 100%; } </style>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css"/>
    <link rel="stylesheet" href="styles.css">


    <!-- Polyfills -->
    <script src="https://unpkg.com/core-js/client/shim.min.js"></script>
    <script src="https://unpkg.com/zone.js@0.8.17?main=browser"></script>
    <script src="https://unpkg.com/systemjs@0.19.39/dist/system.src.js"></script>

    <script>
        var appLocation = '';
        var boilerplatePath = '';
        var systemJsMap = {"ag-grid":"https:\/\/unpkg.com\/ag-grid@18.1.1\/dist\/ag-grid.js","ag-grid\/main":"https:\/\/unpkg.com\/ag-grid@18.1.1\/dist\/ag-grid.js","ag-grid-enterprise":"https:\/\/unpkg.com\/ag-grid-enterprise@18.1.1\/","ag-grid-react":"npm:ag-grid-react@18.1.0\/","ag-grid-angular":"npm:ag-grid-angular@18.1.0\/","ag-grid-vue":"npm:ag-grid-vue@18.1.0\/"};
    </script>

    <script src="systemjs.config.js"></script>

    <script>
    System.import('main.ts').catch(function(err){ console.error(err); });
    </script>

</head>
<body>
    <my-app>Loading ag-Grid example&hellip;</my-app>
</body>
</html>

import { Component, ViewChild } from "@angular/core";
import { HttpClient } from "@angular/common/http";
import { CustomHeader } from "./custom-header.component";

@Component({
  selector: "my-app",
  template: `


<ag-grid-angular
    #agGrid
    style="width: 100%; height: 100%;"
    id="myGrid"
    [rowData]="rowData"
    class="ag-theme-balham"
    [columnDefs]="columnDefs"
    [enableFilter]="true"
    [enableSorting]="true"
    [enableColResize]="true"
    [suppressMenuHide]="true"
    [frameworkComponents]="frameworkComponents"
    [defaultColDef]="defaultColDef"
    (gridReady)="onGridReady($event)"
    ></ag-grid-angular>


`
})
export class AppComponent {
  private gridApi;
  private gridColumnApi;
  private rowData: any[];

  private columnDefs;
  private frameworkComponents;
  private defaultColDef;

  constructor(private http: HttpClient) {
    this.columnDefs = [
      {
        headerName: "Athlete",
        field: "athlete",
        width: 125,
        suppressMenu: true
      },
      {
        headerName: "Age",
        field: "age",
        width: 90,
        //suppressSorting: true,
        headerComponentParams: { menuIcon: "fa-external-link" }
      },
      {
        headerName: "Country",
        field: "country",
        width: 120,
        suppressMenu: true
      },
      {
        headerName: "Year",
        field: "year",
        width: 90,
        //suppressSorting: true
      },
      {
        headerName: "Date",
        field: "date",
        width: 100,
        suppressMenu: true
      },
      {
        headerName: "Sport",
        field: "sport",
        width: 90,
        suppressSorting: true
      },
      {
        headerName: "Gold",
        field: "gold",
        width: 115,
        headerComponentParams: { menuIcon: "fa-cog" }
      },
      {
        headerName: "Silver",
        field: "silver",
        width: 90,
        suppressSorting: true
      },
      {
        headerName: "Bronze",
        field: "bronze",
        width: 115,
        suppressMenu: true
      },
      {
        headerName: "Total",
        field: "total",
        width: 90,
        suppressSorting: true
      }
    ];
    this.frameworkComponents = { agColumnHeader: CustomHeader };
    this.defaultColDef = {
      width: 100,
      headerComponentParams: { menuIcon: "fa-bars" }
    };
  }

  onGridReady(params) {
    this.gridApi = params.api;
    this.gridColumnApi = params.columnApi;

    this.http
      .get("https://raw.githubusercontent.com/ag-grid/ag-grid-docs/master/src/olympicWinnersSmall.json")
      .subscribe(data => {
        this.rowData = data;
      });
  }
}

import { NgModule } from "@angular/core";
import { BrowserModule } from "@angular/platform-browser";
import { FormsModule } from "@angular/forms"; // <-- NgModel lives here
// HttpClient
import { HttpClientModule } from "@angular/common/http";

// ag-grid
import { AgGridModule } from "ag-grid-angular";
import { AppComponent } from "./app.component";

import { CustomHeader } from "./custom-header.component";

@NgModule({
  imports: [
    BrowserModule,
    FormsModule, // <-- import the FormsModule before binding with [(ngModel)]
    HttpClientModule,
    AgGridModule.withComponents([CustomHeader])
  ],
  declarations: [AppComponent, CustomHeader],
  bootstrap: [AppComponent]
})
export class AppModule {}

import {Component, ViewChild, ElementRef} from '@angular/core';
import {ILoadingOverlayComponentAngularComp} from "ag-grid-angular";

@Component({
    selector: 'app-loading-overlay',
    template: `
        <div>
            <div *ngIf="params.enableMenu" #menuButton class="customHeaderMenuButton" (click)="onMenuClicked($event)"><i class="fa {{params.menuIcon}}"></i></div> 
            <div class="customHeaderLabel">{{params.displayName}}</div> 
            <div class="action-holders__sort-number action-holders__sorting" *ngIf="this.noSort !== 'inactive'">
              <p id="sortingOrder{{colId}}"></p>
            </div>
            <div *ngIf="params.enableSorting" (click)="onSortRequested('asc', $event)" [ngClass]="ascSort" class="customSortDownLabel"><i class="fa fa-long-arrow-down"></i></div> 
            <div *ngIf="params.enableSorting" (click)="onSortRequested('desc', $event)" [ngClass]="descSort" class="customSortUpLabel"><i class="fa fa-long-arrow-up"></i></div> 
            <div *ngIf="params.enableSorting" (click)="onSortRequested('', $event)" [ngClass]="noSort" class="customSortRemoveLabel"><i class="fa fa-times"></i></div>
        </div>
    `,
    styles: [
        `
        .customHeaderMenuButton {
            margin-top: 5px;
            margin-left: 4px;
            float: left;
        }
        .action-holders__sort-number.action-holders__sorting {
            position: relative;
            float: left;
            width: 7px;
            height: 32px;
        }
        .action-holders__sort-number.action-holders__sorting p{
          padding:0;
          margin:0;
        }
    
        .customHeaderLabel {
            margin-left: 5px;
            margin-top: 3px;
        }
    
        .customSortDownLabel {
            float: left;
            margin-left: 10px;
            margin-top: 5px;
        }
    
        .customSortUpLabel {
            float: left;
            margin-left: 3px;
            margin-top: 4px;
        }
    
        .customSortRemoveLabel {
            float: left;
            font-size: 11px;
            margin-left: 3px;
            margin-top: 6px;
        }
    
        .active {
            color: cornflowerblue;
        }
    `
    ]
})
export class CustomHeader {
    private params: any;

    private ascSort: string;
    
    public colId;
    public sortNumber = 0;


    private descSort: string;
    private noSort: string;

    @ViewChild('menuButton', {read: ElementRef}) public menuButton;

    agInit(params): void {
        this.params = params;
        params.column.addEventListener('sortChanged', this.onSortChanged.bind(this));
        this.onSortChanged();
        this.colId = this.params.column.getColId().replace(/\s/g, '');

    }

    onMenuClicked() {
        this.params.showColumnMenu(this.menuButton.nativeElement);
    };

    onSortChanged() {
        this.ascSort = this.descSort = this.noSort = 'inactive';
        if (this.params.column.isSortAscending()) {
            this.ascSort = 'active';
        } else if (this.params.column.isSortDescending()) {
            this.descSort = 'active';
        } else {
            this.noSort = 'active';
        }
    }
    
      /**
   * Check for sort Order
   */
  checkSortOrder() {
    
    const sortingArray = this.params.api.getSortModel();
    let j: number;
    if (sortingArray.length > 1) {
      setTimeout(() => {
        for (j = 0; j < sortingArray.length; j++) {
          this.sortNumber = j + 1;
          console.log(this.sortNumber);
          const sortingDom = <HTMLElement>document.getElementById('sortingOrder' + sortingArray[j].colId.replace(/\s/g, ''))
          sortingDom.innerHTML = this.sortNumber.toString();
        }
      });
    }
    
  }

    onSortRequested(order, event) {
        this.params.setSort(order, event.shiftKey);
        this.checkSortOrder();
    }
}

.customHeaderMenuButton {
  margin-top: 5px;
  margin-left: 4px;
  float: left;
}

.customHeaderLabel {
  margin-left: 5px;
  margin-top: 3px;
  float: left;
}

.customSortDownLabel {
  float: left;
  margin-left: 10px;
  margin-top: 5px;
}

.customSortUpLabel {
  float: left;
  margin-left: 3px;
  margin-top: 4px;
}

.customSortRemoveLabel {
  float: left;
  font-size: 11px;
  margin-left: 3px;
  margin-top: 6px;
}

.active {
  color: cornflowerblue;
}

// Angular entry point file
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from 'app/app.module';

platformBrowserDynamic().bootstrapModule(AppModule);

/**
 * WEB ANGULAR VERSION
 * (based on systemjs.config.js from the angular tutorial - https://angular.io/tutorial)
 * System configuration for Angular samples
 * Adjust as necessary for your application needs.
 */
var templateUrlRegex = /templateUrl\s*:(\s*['"`](.*?)['"`]\s*)/gm;
var stylesRegex = /styleUrls *:(\s*\[[^\]]*?\])/g;
var stringRegex = /(['`"])((?:[^\\]\\\1|.)*?)\1/g;

module.exports.translate = function(load){
  if (load.source.indexOf('moduleId') != -1) return load;

  var url = document.createElement('a');
  url.href = load.address;

  var basePathParts = url.pathname.split('/');

  basePathParts.pop();
  var basePath = basePathParts.join('/');

  var baseHref = document.createElement('a');
  baseHref.href = this.baseURL;
  baseHref = baseHref.pathname;

  if (!baseHref.startsWith('/base/')) { // it is not karma
    basePath = basePath.replace(baseHref, '');
  }

  load.source = load.source
    .replace(templateUrlRegex, function(match, quote, url){
      var resolvedUrl = url;

      if (url.startsWith('.')) {
        resolvedUrl = basePath + url.substr(1);
      }

      return 'templateUrl: "' + resolvedUrl + '"';
    })
    .replace(stylesRegex, function(match, relativeUrls) {
      var urls = [];

      while ((match = stringRegex.exec(relativeUrls)) !== null) {
        if (match[2].startsWith('.')) {
          urls.push('"' + basePath + match[2].substr(1) + '"');
        } else {
          urls.push('"' + match[2] + '"');
        }
      }

      return "styleUrls: [" + urls.join(', ') + "]";
    });

  return load;
};

/**
 * WEB ANGULAR VERSION
 * (based on systemjs.config.js from the angular tutorial - https://angular.io/tutorial)
 * System configuration for Angular samples
 * Adjust as necessary for your application needs.
 */
(function(global) {
    var ANGULAR_VERSION = "5.1.3";
    var ANGULAR_CDK_VERSION = "5.2.5";
    var ANGULAR_MATERIAL_VERSION = "5.2.5";

    System.config({
        // DEMO ONLY! REAL CODE SHOULD NOT TRANSPILE IN THE BROWSER
        transpiler: "ts",
        typescriptOptions: {
            // Copy of compiler options in standard tsconfig.json
            target: "es5",
            module: "system", //gets rid of console warning
            moduleResolution: "node",
            sourceMap: true,
            emitDecoratorMetadata: true,
            experimentalDecorators: true,
            lib: ["es2015", "dom"],
            noImplicitAny: true,
            suppressImplicitAnyIndexErrors: true
        },
        meta: {
            typescript: {
                exports: "ts"
            }
        },
        paths: {
            // paths serve as alias
            "npm:": "https://unpkg.com/"
        },
        // RxJS makes a lot of requests to unpkg. This guy addressed it:
        // https://github.com/OasisDigital/rxjs-system-bundle.
        bundles: {
            "npm:rxjs-system-bundle@5.5.5/Rx.system.js": [
                "rxjs",
                "rxjs/*",
                "rxjs/operator/*",
                "rxjs/operators/*",
                "rxjs/observable/*",
                "rxjs/scheduler/*",
                "rxjs/symbol/*",
                "rxjs/add/operator/*",
                "rxjs/add/observable/*",
                "rxjs/util/*"
            ]
        },
        // map tells the System loader where to look for things
        map: Object.assign(
            {
                // angular bundles
                "@angular/animations": "npm:@angular/animations@" + ANGULAR_VERSION + "/bundles/animations.umd.js",
                "@angular/animations/browser": "npm:@angular/animations@" + ANGULAR_VERSION + "/bundles/animations-browser.umd.js",
                "@angular/core": "npm:@angular/core@" + ANGULAR_VERSION + "/bundles/core.umd.js",
                "@angular/common": "npm:@angular/common@" + ANGULAR_VERSION + "/bundles/common.umd.js",
                "@angular/common/http": "npm:@angular/common@" + ANGULAR_VERSION + "/bundles/common-http.umd.js",
                "@angular/compiler": "npm:@angular/compiler@" + ANGULAR_VERSION + "/bundles/compiler.umd.js",
                "@angular/platform-browser": "npm:@angular/platform-browser@" + ANGULAR_VERSION + "/bundles/platform-browser.umd.js",
                "@angular/platform-browser/animations": "npm:@angular/platform-browser@" + ANGULAR_VERSION + "/bundles/platform-browser-animations.umd.js",
                "@angular/platform-browser-dynamic": "npm:@angular/platform-browser-dynamic@" + ANGULAR_VERSION + "/bundles/platform-browser-dynamic.umd.js",
                "@angular/http": "npm:@angular/http@" + ANGULAR_VERSION + "/bundles/http.umd.js",
                "@angular/router": "npm:@angular/router@" + ANGULAR_VERSION + "/bundles/router.umd.js",
                "@angular/router/upgrade": "npm:@angular/router@" + ANGULAR_VERSION + "/bundles/router-upgrade.umd.js",
                "@angular/forms": "npm:@angular/forms@" + ANGULAR_VERSION + "/bundles/forms.umd.js",
                "@angular/upgrade": "npm:@angular/upgrade@" + ANGULAR_VERSION + "/bundles/upgrade.umd.js",
                "@angular/upgrade/static": "npm:@angular/upgrade@" + ANGULAR_VERSION + "/bundles/upgrade-static.umd.js",
                "angular-in-memory-web-api": "npm:angular-in-memory-web-api/bundles/in-memory-web-api.umd.js",
                // material design
                "@angular/material": "npm:@angular/material@" + ANGULAR_MATERIAL_VERSION + "/bundles/material.umd.js",
                "@angular/cdk/platform": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-platform.umd.js",
                "@angular/cdk/bidi": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-bidi.umd.js",
                "@angular/cdk/coercion": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-coercion.umd.js",
                "@angular/cdk/keycodes": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-keycodes.umd.js",
                "@angular/cdk/a11y": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-a11y.umd.js",
                "@angular/cdk/overlay": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-overlay.umd.js",
                "@angular/cdk/portal": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-portal.umd.js",
                "@angular/cdk/observers": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-observers.umd.js",
                "@angular/cdk/collections": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-collections.umd.js",
                "@angular/cdk/accordion": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-accordion.umd.js",
                "@angular/cdk/scrolling": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-scrolling.umd.js",
                "@angular/cdk/layout": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-layout.umd.js",
                "@angular/cdk/table": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-table.umd.js",
                "@angular/cdk/text-field": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-text-field.umd.js",
                "@angular/cdk/tree": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-tree.umd.js",
                "@angular/cdk/stepper": "npm:@angular/cdk@" + ANGULAR_CDK_VERSION + "/bundles/cdk-stepper.umd.js",
                // ngx bootstrap
                "ngx-bootstrap": "npm:ngx-bootstrap@2.0.0-rc.0",
                // ng2 typeahead
                "ng2-typeahead": "npm:ng2-typeahead@1.2.0",

                ts: "npm:plugin-typescript@5.2.7/lib/plugin.js",
                tslib: "npm:tslib@1.7.1/tslib.js",
                typescript: "npm:typescript@2.3.2/lib/typescript.js",

                // for some of the examples
                lodash: "npm:lodash@4.17.4/lodash.js",

                // our app is within the app folder, appLocation comes from index.html
                app: appLocation + "app",

                rxjs: "npm:rxjs@6.1.0/bundles/rxjs.umd.min.js"
            },
            systemJsMap
        ),
        // packages tells the System loader how to load when no filename and/or no extension
        packages: {
            app: {
                main: "./main.ts",
                defaultExtension: "ts",
                meta: {
                    "./*.ts": {
                        loader: boilerplatePath + "systemjs-angular-loader.js"
                    }
                }
            },
            "ag-grid-angular": {
                main: "./main.js",
                defaultExtension: "js"
            },
            "ag-grid-enterprise": {
                main: "./main.js",
                defaultExtension: "js"
            },
            rxjs: {
                defaultExtension: false
            }
        }
    });
})(this);