# All files / src/app/shared/components/select select.component.ts

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83.33% Branches 20/24
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100% Lines 74/74

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     import { Component, EventEmitter, Input, OnChanges, OnInit, Output } from '@angular/core';
    import { FormControl, ValidatorFn } from '@angular/forms';

    import { I18n } from '@ngx-translate/i18n-polyfill';
    import * as _ from 'lodash';

    import { CdFormGroup } from '../../forms/cd-form-group';
    import { SelectMessages } from './select-messages.model';
    import { SelectOption } from './select-option.model';

    @Component({
      selector: 'cd-select',
      template: require('./select.component.html'),
      styles: []
    })
    export class SelectComponent implements OnInit, OnChanges {
      @Input()
      elemClass: string;
      @Input()
      data: Array<string> = [];
      @Input()
      options: Array<SelectOption> = [];
      @Input()
      messages = new SelectMessages({}, this.i18n);
      @Input()
      selectionLimit: number;
      @Input()
      customBadges = false;
      @Input()
      customBadgeValidators: ValidatorFn[] = [];

      @Output()
      selection = new EventEmitter();

      form: CdFormGroup;
      filter: FormControl;
      Object = Object;
      filteredOptions: Array<SelectOption> = [];

      constructor(private i18n: I18n) {}

      ngOnInit() {
        this.initFilter();
        if (this.data.length > 0) {
          this.initMissingOptions();
        }
        this.options = _.sortBy(this.options, ['name']);
        this.updateOptions();
      }

      private initFilter() {
        this.filter = new FormControl('', { validators: this.customBadgeValidators });
        this.form = new CdFormGroup({ filter: this.filter });
        this.filteredOptions = [...(this.options || [])];
      }

      private initMissingOptions() {
        const options = this.options.map((option) => option.name);
        const needToCreate = this.data.filter((option) => options.indexOf(option) === -1);
        needToCreate.forEach((option) => this.addOption(option));
        this.forceOptionsToReflectData();
      }

      private addOption(name: string) {
        this.options.push(new SelectOption(false, name, ''));
        this.options = _.sortBy(this.options, ['name']);
        this.triggerSelection(this.options.find((option) => option.name === name));
      }

      triggerSelection(option: SelectOption) {
        if (
          !option ||
          (this.selectionLimit && !option.selected && this.data.length >= this.selectionLimit)
        ) {
          return;
        }
        option.selected = !option.selected;
        this.updateOptions();
        this.selection.emit({ option: option });
      }

      private updateOptions() {
        this.data.splice(0, this.data.length);
        this.options.forEach((option: SelectOption) => {
          if (option.selected) {
            this.data.push(option.name);
          }
        });
        this.updateFilter();
      }

      updateFilter() {
        this.filteredOptions = this.options.filter((option) => option.name.includes(this.filter.value));
      }

      private forceOptionsToReflectData() {
        this.options.forEach((option) => {
          if (this.data.indexOf(option.name) !== -1) {
            option.selected = true;
          }
        });
      }

      ngOnChanges() {
        if (this.filter) {
          this.updateFilter();
        }
        if (!this.options || !this.data || this.data.length === 0) {
          return;
        }
        this.forceOptionsToReflectData();
      }

      selectOption() {
        if (this.filteredOptions.length === 0) {
          this.addCustomOption();
        } else {
          this.triggerSelection(this.filteredOptions[0]);
          this.resetFilter();
        }
      }

      addCustomOption() {
        if (!this.isCreatable()) {
          return;
        }
        this.addOption(this.filter.value);
        this.resetFilter();
      }

      isCreatable() {
        return (
          this.customBadges &&
          this.filter.valid &&
          this.filter.value.length > 0 &&
          this.filteredOptions.every((option) => option.name !== this.filter.value)
        );
      }

      private resetFilter() {
        this.filter.setValue('');
        this.updateFilter();
      }

      removeItem(item: string) {
        this.triggerSelection(
          this.options.find((option: SelectOption) => option.name === item && option.selected)
        );
      }
    }