extensions/objects/templates/fraction-editor.component.ts - develop - githubmirror/oppia

extensions/objects/templates/fraction-editor.component.ts
79 строк3 KB
Hardik Goyal
Fix #7092: Remove downgradeComponent (#21903)
18 фев 2025, 21:22
18 фев 2025, 21:224dbd84c
// Copyright 2017 The Oppia Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/**
 * @fileoverview Component for fraction editor.
 */

import {Component, EventEmitter, Input, OnInit, Output} from '@angular/core';
import {Fraction} from 'domain/objects/fraction.model';
import {EventBusGroup, EventBusService} from 'app-events/event-bus.service';
import {FractionAnswer} from 'interactions/answer-defs';

@Component({
  selector: 'fraction-editor',
  templateUrl: './fraction-editor.component.html',
  styleUrls: [],
})
export class FractionEditorComponent implements OnInit {
  // These properties are initialized using Angular lifecycle hooks
  // and we need to do non-null assertion. For more information, see
  // https://github.com/oppia/oppia/wiki/Guide-on-defining-types#ts-7-1
  @Input() value!: FractionAnswer;
  @Output() valueChanged = new EventEmitter();
  errorMessageI18nKey: string = '';
  fractionString: string = '0';
  currentFractionValueIsValid = false;
  eventBus: EventBusGroup;
  @Output() validityChange = new EventEmitter();

  constructor(private eventBusService: EventBusService) {
    this.eventBus = new EventBusGroup(this.eventBusService);
  }

  ngOnInit(): void {
    if (this.value) {
      this.fractionString = Fraction.fromDict(this.value).toString();
    }
  }

  validateFraction(newFraction: string): void {
    if (newFraction.length === 0) {
      this.errorMessageI18nKey = 'I18N_INTERACTIONS_FRACTIONS_NON_EMPTY';
      this.currentFractionValueIsValid = false;
      this.validityChange.emit({error: false});
      return;
    }
    try {
      const INTERMEDIATE_REGEX = /^\s*-?\s*$/;
      if (!INTERMEDIATE_REGEX.test(newFraction)) {
        this.value = Fraction.fromRawInputString(newFraction);
        this.valueChanged.emit(this.value);
      }
      this.errorMessageI18nKey = '';
      this.currentFractionValueIsValid = true;
      // We use unknown type because we are unsure of the type of error
      // that was thrown. Since the catch block cannot identify the
      // specific type of error, we are unable to further optimise the
      // code by introducing more types of errors.
    } catch (parsingError: unknown) {
      if (parsingError instanceof Error) {
        this.errorMessageI18nKey = parsingError.message;
      }
      this.currentFractionValueIsValid = false;
    } finally {
      this.validityChange.emit({error: this.currentFractionValueIsValid});
    }
  }
}