@nativescript/template-master-detail-ng/src/app/cars/car-detail-edit/my-list-selector/my-list-selector.component.ts

Master-detail interface to display collection of items from json collection and inspect and edit selected item properties.

import { Component, EventEmitter, Input, OnInit, Output, ViewContainerRef } from '@angular/core'
import { ModalDialogOptions, ModalDialogService, PageRoute } from '@nativescript/angular'
import { switchMap } from 'rxjs/operators'

import { CarEditService } from '../../shared/car-edit.service'
import { Car } from '../../shared/car.model'
import { MyListSelectorModalViewComponent } from './my-list-selector-modal-view.component'

const capitalizeFirstLetter = (s) => s.charAt(0).toUpperCase() + s.slice(1)

@Component({
  providers: [ModalDialogService],
  selector: 'MyListSelector',
  templateUrl: './my-list-selector.component.html',
})
export class MyListSelectorComponent implements OnInit {
  @Input() tag: string
  @Input() items: Array<string>
  @Input() selectedValue: string
  @Output() selectedValueChange = new EventEmitter<string>()

  private _carEditModel: Car

  constructor(
    private _pageRoute: PageRoute,
    private _modalService: ModalDialogService,
    private _vcRef: ViewContainerRef,
    private _carEditService: CarEditService
  ) {}

  ngOnInit(): void {
    let carId = ''

    this._pageRoute.activatedRoute
      .pipe(switchMap((activatedRoute) => activatedRoute.params))
      .forEach((params) => {
        carId = params.id
      })

    this._carEditModel = this._carEditService.getEditableCarById(carId)
  }

  onSelectorTap(): void {
    const title = `Select Car ${capitalizeFirstLetter(this.tag)}`
    const selectedIndex = this.items.indexOf(this.selectedValue)
    const options: ModalDialogOptions = {
      viewContainerRef: this._vcRef,
      context: {
        items: this.items,
        title,
        selectedIndex,
      },
      fullscreen: false,
    }

    this._modalService
      .showModal(MyListSelectorModalViewComponent, options)
      .then((selectedValue: string) => {
        if (selectedValue) {
          this.selectedValue = selectedValue
          this.selectedValueChange.emit(this.selectedValue)
        }
      })
  }
}