openaire-library/sharedComponents/input/input.component.ts

import {
  AfterViewInit,
  Component,
  ElementRef,
  EventEmitter,
  HostListener,
  Input,
  OnChanges,
  OnDestroy,
  OnInit,
  Output,
  SimpleChanges,
  ViewChild
} from "@angular/core";
import {AbstractControl, FormArray, FormControl, ValidatorFn} from "@angular/forms";
import {HelperFunctions} from "../../utils/HelperFunctions.class";
import {Observable, of, Subscription} from "rxjs";
import {MatSelect} from "@angular/material/select";
import {MatAutocompleteSelectedEvent} from "@angular/material/autocomplete";
import {map, startWith} from "rxjs/operators";
import {MatChipInputEvent} from "@angular/material/chips";
import {EnvProperties} from "../../utils/properties/env-properties";
import {properties} from "../../../../environments/environment";

export interface Option {
  icon?: string,
  iconClass?: string,
  value: any,
  label: string
}

/**
 * WARNING! dashboard-input selector is @deprecated, use input instead
 *
 * */
@Component({
  selector: '[dashboard-input], [input]',
  template: `
    <div class="input-container" [ngClass]="inputClass" [class.disabled]="formControl.disabled"
         [class.focused]="(focused && type !== 'select') || formControl.value" [class.opened]="opened">
      <div #inputBox class="input-wrapper" [class.select]="type === 'select'">
        <div class="placeholder">
          <label>{{placeholder}} <sup *ngIf="required">*</sup></label>
        </div>
        <div class="uk-flex" [class.uk-flex-middle]="type !== 'textarea'">
          <ng-template [ngIf]="type === 'text' || type === 'URL' || type === 'logoURL'">
            <input #input class="input" [formControl]="formAsControl">
          </ng-template>
          <ng-template [ngIf]="type === 'textarea'">
            <textarea #textArea class="input" [rows]="rows" [formControl]="formAsControl"></textarea>
          </ng-template>
          <ng-template [ngIf]="type === 'select'">
            <div class="input">{{getLabel(formControl.value)}}</div>
          </ng-template>
          <div *ngIf="formControl.disabled || icon || type === 'select'" class="uk-margin-small-left uk-margin-right">
            <icon *ngIf="formControl.disabled" [name]="'lock'" [flex]="true"></icon>
            <icon *ngIf="formControl.enabled && icon" [name]="icon" [flex]="true"></icon>
            <icon *ngIf="formControl.enabled && !icon" name="arrow_drop_down" [flex]="true"></icon>
          </div>
        </div>
        <div class="tools">
          <ng-content select="[tools]"></ng-content>
        </div>
      </div>
      <div #optionBox class="options">
        <ul *ngIf="options?.length > 1">
          <li *ngFor="let option of options" [class.uk-active]="formControl.value === option.value">
            <a (click)="selectOption(option)">{{option.label}}</a>
          </li>
        </ul>
      </div>
    </div>
    <!--<ng-template [ngIf]="type === 'select'">
      <div [ngClass]="inputClass"
           [attr.uk-tooltip]="formControl.disabled?'title: This field is not editable; pos: bottom-left':null"
           [class.clickable]="formControl.enabled"
           [class.uk-form-danger]="formControl.invalid && formControl.touched" (click)="openSelect()">
        <mat-form-field class="uk-width-1-1">
          <mat-select #select [required]="required" [value]="null"
                      (openedChange)="stopPropagation()" [formControl]="formAsControl"
                      [disableOptionCentering]="true">
            <mat-option *ngIf="placeholder" class="uk-hidden" [value]="''">{{placeholder}}</mat-option>
            <mat-option *ngFor="let option of options" [value]="option.value"
                        [attr.uk-tooltip]="(tooltip) ? option.label : null">
              {{option.label}}
            </mat-option>
          </mat-select>
        </mat-form-field>
      </div>
    </ng-template>-->
    <ng-template [ngIf]="type === 'autocomplete'">
      <div [ngClass]="inputClass"
           [attr.uk-tooltip]="formControl.disabled?'title: This field is not editable; pos: bottom-left':null"
           [class.clickable]="formControl.enabled"
           [class.uk-form-danger]="formControl.invalid && formControl.touched" (click)="openSelect()">
        <mat-form-field class="uk-width-1-1">
          <mat-chip-list #chipList>
            <mat-chip *ngIf="formControl.value" [selectable]="false" [removable]="removable"
                      [attr.uk-tooltip]="getLabel(formControl.value)">
                  <span class="uk-flex uk-flex-middle uk-width-1-1">
                    <span class="uk-width-expand uk-text-truncate"
                          [class.uk-text-small]="smallChip">{{getLabel(formControl.value)}}</span>
                    <icon name="remove_circle" class="mat-chip-remove" [flex]="true" [ratio]="smallChip?0.8:1"
                          (click)="resetSearch($event)"></icon>
                  </span>
            </mat-chip>
            <div [class.uk-hidden]="formControl.value" class="uk-width-expand uk-position-relative chip-input">
              <input #searchInput [formControl]="searchControl" [matAutocomplete]="auto"
                     [matChipInputFor]="chipList" [matAutocompleteConnectedTo]="origin">
              <div *ngIf="placeholder && !searchInput.value" class="placeholder uk-width-1-1"
                   (click)="searchInput.focus()">{{placeholder}}</div>
            </div>
            <div class="uk-width-1-1 uk-invisible" matAutocompleteOrigin #origin="matAutocompleteOrigin"></div>
          </mat-chip-list>
          <mat-autocomplete #auto="matAutocomplete" (optionSelected)="formControl.setValue($event.option.value)"
                            [class]="panelClass" [panelWidth]="panelWidth">
            <mat-option *ngFor="let option of filteredOptions | async" [value]="option.value"
                        [attr.uk-tooltip]="option.label">
              {{option.label}}
            </mat-option>
          </mat-autocomplete>
        </mat-form-field>
      </div>
    </ng-template>
    <ng-template [ngIf]="type === 'chips'">
      <div [ngClass]="inputClass"
           [attr.uk-tooltip]="formControl.disabled?'title: This field is not editable; pos: bottom-left':null"
           [class.clickable]="formControl.enabled"
           [class.uk-form-danger]="formControl.invalid && searchControl.invalid && searchControl.touched"
           (click)="openSelect()">
        <mat-form-field class="uk-width-1-1">
          <mat-chip-list #chipList>
            <mat-chip *ngFor="let chip of formAsArray.controls; let i=index" [selectable]="false"
                      [removable]="removable" [attr.uk-tooltip]="getLabel(chip.value)">
                  <span class="uk-flex uk-flex-middle uk-width-1-1">
                    <span class="uk-width-expand uk-text-truncate"
                          [class.uk-text-small]="smallChip">{{getLabel(chip.value)}}</span>
                    <icon name="remove_circle" class="mat-chip-remove" [flex]="true" [ratio]="smallChip?0.8:1"
                          (click)="removed(i)"></icon>
                  </span>
            </mat-chip>
            <div class="uk-width-expand uk-position-relative chip-input">
              <input #searchInput style="width: calc(100% - 8px) !important;" [formControl]="searchControl"
                     [matAutocomplete]="auto"
                     [matChipInputFor]="chipList" [matAutocompleteConnectedTo]="origin"
                     [matChipInputAddOnBlur]="addExtraChips && searchControl.value"
                     (matChipInputTokenEnd)="add($event)">
              <div *ngIf="placeholder && !searchControl.value" class="placeholder uk-width-1-1"
                   (click)="searchInput.focus()">{{placeholder}}</div>
            </div>
            <div class="uk-width-1-1 uk-invisible" matAutocompleteOrigin #origin="matAutocompleteOrigin"></div>
          </mat-chip-list>
          <mat-autocomplete #auto="matAutocomplete" (optionSelected)="selected($event)" [class]="panelClass"
                            [panelWidth]="panelWidth">
            <mat-option *ngFor="let option of filteredOptions | async" [value]="option.value"
                        [attr.uk-tooltip]="option.label">
              {{option.label}}
            </mat-option>
          </mat-autocomplete>
        </mat-form-field>
      </div>
    </ng-template>
    <span *ngIf="formControl.invalid && formControl.touched" class="uk-text-danger input-message">
      <span *ngIf="formControl.errors.error">{{formControl.errors.error}}</span>
      <span
          *ngIf="type === 'URL' || type === 'logoURL'">Please provide a valid URL (e.g. https://example.com)</span>
    </span>
    <span class="uk-text-danger uk-text-small">
      <ng-content select="[error]"></ng-content>
    </span>
    <span *ngIf="formControl.valid" class="uk-text-warning uk-text-small">
      <ng-content select="[warning]"></ng-content>
      <span *ngIf="!secure">
        <span class="uk-text-bold">Note:</span> Prefer urls like "<span class="uk-text-bold">https://</span>example.com/my-secure-image.png"
            instead of "<span class="uk-text-bold">http://</span>example.com/my-image.png".
            <span class="uk-text-bold">Browsers may not load non secure content.</span>
      </span>
    </span>
    <span class="uk-text-small">
      <ng-content select="[note]"></ng-content>
    </span>
  `,
  styleUrls: ['input.component.css']
})
export class InputComponent implements OnInit, OnDestroy, AfterViewInit, OnChanges {
  /** Basic information */
  @Input('formInput') formControl: AbstractControl;
  @Input('type') type: 'text' | 'URL' | 'logoURL' | 'autocomplete' | 'textarea' | 'select' | 'chips' = 'text';
  @Input() value: any | any[];
  @Output() valueChange = new EventEmitter<any | any[]>();
  /** @deprecated */
  @Input('label') label: string;
  /** Text */
  @ViewChild('input') input: ElementRef;
  /** Textarea options */
  @ViewChild('textArea') textArea: ElementRef;
  @Input('rows') rows: number = 3;
  /** Select | chips available options */
  @Input('options') options: Option[] = [];
  /** @deprecated */
  @Input('hint') hint = null;
  @Input('placeholder') placeholder = '';
  @Input() inputClass: string = 'inner';
  /** Extra element Right or Left of the input */
  /** @deprecated */
  @Input() extraLeft: boolean = true;
  /** @deprecated */
  @Input() gridSmall: boolean = false;
  /** @deprecated */
  @Input() hideControl: boolean = false;
  /** @deprecated */
  @Input() flex: 'middle' | 'top' | 'bottom' = 'middle';
  /** Icon on the input */
  @Input() icon: string = null;
  /** @deprecated */
  @Input() iconLeft: boolean = false;
  /** Chip options */
  @Input() removable: boolean = true;
  @Input() addExtraChips: boolean = false;
  @Input() smallChip: boolean = false;
  @Input() panelWidth: number = 300;
  @Input() panelClass: string = null;
  @Input() showOptionsOnEmpty: boolean = true;
  @Input() validators: ValidatorFn[] | ValidatorFn;
  @Input() disabled: boolean = false;
  @Output() focusEmitter: EventEmitter<boolean> = new EventEmitter<boolean>();
  /** LogoUrl information */
  public secure: boolean = true;
  /** Internal basic information */
  public required: boolean = false;
  public focused: boolean = false;
  public opened: boolean = false;
  public properties: EnvProperties = properties;
  private initValue: any;
  private subscriptions: any[] = [];
  /** Chips && Autocomplete*/
  public filteredOptions: Observable<Option[]>;
  public searchControl: FormControl;
  @Input() tooltip: boolean = true;
  @ViewChild('inputBox') inputBox: ElementRef;
  @ViewChild('optionBox') optionBox: ElementRef;
  @ViewChild('searchInput') searchInput: ElementRef;
  
  constructor(private elementRef: ElementRef) {
    if (elementRef.nativeElement.hasAttribute('dashboard-input') && this.properties.environment === "development") {
      console.warn("'dashboard-input' selector is deprecated; use 'input' instead.");
    }
  }
  
  @HostListener('document:click', ['$event'])
  click(event) {
    this.focused = (this.inputBox && this.inputBox.nativeElement.contains(event.target));
    if (this.focused) {
      if(this.input) {
        this.input.nativeElement.focus();
      } else if(this.textArea) {
        this.textArea.nativeElement.focus();
      }
      this.open(!this.opened);
    } else {
      this.open(false);
    }
    this.focusEmitter.emit(this.focused);
  }
  
  ngOnInit() {
    if(!this.formControl) {
      if(Array.isArray(this.value)) {
        this.formControl = new FormArray([]);
        this.value.forEach(value => {
          this.formAsArray.push(new FormControl(value, this.validators));
        });
      } else {
        this.formControl = new FormControl(this.value);
        this.formControl.setValidators(this.validators);
      }
      if(this.disabled) {
        this.formControl.disable();
      }
    }
  }
  
  ngAfterViewInit() {
    /** If options are available set max-height base on input-wrapper height */
    if(this.options && this.options.length > 1) {
      this.elementRef.nativeElement.style.maxHeight = this.inputBox.nativeElement.clientHeight + 'px';
    }
    this.reset();
  }
  
  ngOnChanges(changes: SimpleChanges) {
    if (changes.formControl || changes.validators) {
      this.reset();
    }
  }
  
  get formAsControl(): FormControl {
    if (this.formControl instanceof FormControl) {
      return this.formControl;
    } else {
      return null;
    }
  }
  
  get formAsArray(): FormArray {
    if (this.formControl instanceof FormArray) {
      return this.formControl;
    } else {
      return null;
    }
  }
  
  reset() {
    this.secure = true;
    this.unsubscribe();
    this.initValue = HelperFunctions.copy(this.formControl.value);
    if (this.type === 'logoURL') {
      this.secure = (!this.initValue || this.initValue.includes('https://'));
    }
    if (this.type === 'chips' || this.type === 'autocomplete') {
      if (this.options) {
        this.filteredOptions = of(this.options);
        this.searchControl = new FormControl('', this.validators);
        this.subscriptions.push(this.searchControl.valueChanges.subscribe(value => {
          setTimeout(() => {
            this.searchInput.nativeElement.focus();
            this.searchInput.nativeElement.value = value;
          }, 0);
        }));
        this.filteredOptions = this.searchControl.valueChanges.pipe(startWith(''),
          map(option => this.filter(option)));
      }
    }
    if (this.formControl && this.formControl.validator) {
      let validator = this.formControl.validator({} as AbstractControl);
      this.required = (validator && validator.required);
    }
    this.subscriptions.push(this.formControl.valueChanges.subscribe(value => {
      value = (value === '') ? null : value;
      if (this.type === 'logoURL') {
        this.secure = (!value || value.includes('https://'));
      }
      if (this.initValue === value || (this.initValue === '' && value === null)) {
        this.formControl.markAsPristine();
      }
      if (this.searchControl) {
        this.searchControl.setValue(null);
      }
      this.value = this.formControl.value;
      this.valueChange.emit(this.value);
    }));
    if (this.input) {
      this.input.nativeElement.disabled = this.formControl.disabled;
    }
  }
  
  unsubscribe() {
    this.subscriptions.forEach(subscription => {
      if (subscription instanceof Subscription) {
        subscription.unsubscribe();
      }
    });
  }
  
  ngOnDestroy(): void {
    this.unsubscribe();
  }
  
  stopPropagation() {
    event.stopPropagation();
  }
  
  removed(index: number) {
    this.formAsArray.removeAt(index);
    this.formAsArray.markAsDirty();
    this.searchControl.setValue('');
    this.stopPropagation();
  }
  
  selected(event: MatAutocompleteSelectedEvent): void {
    this.formAsArray.push(new FormControl(event.option.value));
    this.formAsArray.markAsDirty();
    this.searchControl.setValue('');
    this.stopPropagation();
  }
  
  private filter(value: string): Option[] {
    let options = this.options;
    if (this.type === "chips") {
      options = options.filter(option => !this.formAsArray.value.find(value => HelperFunctions.equals(option.value, value)));
    }
    if ((!value || value.length == 0)) {
      return (this.showOptionsOnEmpty) ? options : [];
    }
    const filterValue = value.toString().toLowerCase();
    return options.filter(option => option.label.toLowerCase().indexOf(filterValue) != -1);
  }
  
  add(event: MatChipInputEvent) {
    if (this.addExtraChips && event.value && this.searchControl.valid) {
      this.stopPropagation();
      this.formAsArray.push(new FormControl(event.value, this.validators));
      this.formAsArray.markAsDirty();
      this.searchControl.setValue('');
      this.searchInput.nativeElement.value = '';
    }
  }
  
  getLabel(value: any) {
    let option = this.options.find(option => HelperFunctions.equals(option.value, value));
    return (option) ? option.label : value;
  }
  
  open(value: boolean) {
    this.opened = value && this.formControl.enabled;
    setTimeout(() => {
      this.optionBox.nativeElement.style.overflow = this.opened?'auto':'hidden';
    }, this.opened?200:0);
  }
  
  resetSearch(event: any) {
    event.stopPropagation();
    this.searchControl.setValue('');
    this.formControl.markAsDirty();
    this.formControl.setValue(null);
  }
  
  selectOption(option: Option) {
    if(this.formAsControl) {
      this.formAsControl.setValue(option.value);
    }
  }
}