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MOBILE-2427 qtype: Support units in numerical questions

main
Dani Palou 2018-12-10 15:33:44 +01:00
parent 21899c74f7
commit e27e294d5b
2 changed files with 40 additions and 109 deletions
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43
src/addon/qtype/calculated/providers/handler.ts
View File

@ -17,7 +17,6 @@ import { Injectable, Injector } from '@angular/core';
import { CoreDomUtilsProvider } from '@providers/utils/dom';
import { CoreUtilsProvider } from '@providers/utils/utils';
import { CoreQuestionHandler } from '@core/question/providers/delegate';
import { AddonQtypeNumericalHandler } from '@addon/qtype/numerical/providers/handler';
import { AddonQtypeCalculatedComponent } from '../component/calculated';
/**
@ -28,8 +27,7 @@ export class AddonQtypeCalculatedHandler implements CoreQuestionHandler {
name = 'AddonQtypeCalculated';
type = 'qtype_calculated';
constructor(private utils: CoreUtilsProvider, private numericalHandler: AddonQtypeNumericalHandler,
private domUtils: CoreDomUtilsProvider) { }
constructor(private utils: CoreUtilsProvider, private domUtils: CoreDomUtilsProvider) { }
/**
* Return the Component to use to display the question.
@ -51,8 +49,7 @@ export class AddonQtypeCalculatedHandler implements CoreQuestionHandler {
* @return {number} 1 if complete, 0 if not complete, -1 if cannot determine.
*/
isCompleteResponse(question: any, answers: any): number {
// This question type depends on numerical.
if (this.isGradableResponse(question, answers) === 0 || !this.numericalHandler.validateUnits(answers['answer'])) {
if (this.isGradableResponse(question, answers) === 0 || !this.validateUnits(answers['answer'])) {
return 0;
}
@ -81,7 +78,6 @@ export class AddonQtypeCalculatedHandler implements CoreQuestionHandler {
* @return {number} 1 if gradable, 0 if not gradable, -1 if cannot determine.
*/
isGradableResponse(question: any, answers: any): number {
// This question type depends on numerical.
let isGradable = this.isValidValue(answers['answer']);
if (isGradable && this.requiresUnits(question)) {
// The question requires a unit.
@ -100,7 +96,6 @@ export class AddonQtypeCalculatedHandler implements CoreQuestionHandler {
* @return {boolean} Whether they're the same.
*/
isSameResponse(question: any, prevAnswers: any, newAnswers: any): boolean {
// This question type depends on numerical.
return this.utils.sameAtKeyMissingIsBlank(prevAnswers, newAnswers, 'answer') &&
this.utils.sameAtKeyMissingIsBlank(prevAnswers, newAnswers, 'unit');
}
@ -126,4 +121,38 @@ export class AddonQtypeCalculatedHandler implements CoreQuestionHandler {
return !!(element.querySelector('select[name*=unit]') || element.querySelector('input[type="radio"]'));
}
/**
* Validate a number with units. We don't have the list of valid units and conversions, so we can't perform
* a full validation. If this function returns true it means we can't be sure it's valid.
*
* @param {string} answer Answer.
* @return {boolean} False if answer isn't valid, true if we aren't sure if it's valid.
*/
validateUnits(answer: string): boolean {
if (!answer) {
return false;
}
const regexString = '[+-]?(?:\\d+(?:\\.\\d*)?|\\.\\d+)(?:e[-+]?\\d+)?';
// Strip spaces (which may be thousands separators) and change other forms of writing e to e.
answer = answer.replace(' ', '');
answer = answer.replace(/(?:e|E|(?:x|\*|×)10(?:\^|\*\*))([+-]?\d+)/, 'e$1');
// If a '.' is present or there are multiple ',' (i.e. 2,456,789) assume ',' is a thousands separator and stip it.
// Else assume it is a decimal separator, and change it to '.'.
if (answer.indexOf('.') != -1 || answer.split(',').length - 1 > 1) {
answer = answer.replace(',', '');
} else {
answer = answer.replace(',', '.');
}
// We don't know if units should be before or after so we check both.
if (answer.match(new RegExp('^' + regexString)) === null || answer.match(new RegExp(regexString + '$')) === null) {
return false;
}
return true;
}
}

106
src/addon/qtype/numerical/providers/handler.ts
View File

@ -13,113 +13,15 @@
// See the License for the specific language governing permissions and
// limitations under the License.
import { Injectable, Injector } from '@angular/core';
import { CoreUtilsProvider } from '@providers/utils/utils';
import { CoreQuestionHandler } from '@core/question/providers/delegate';
import { AddonQtypeShortAnswerComponent } from '@addon/qtype/shortanswer/component/shortanswer';
import { Injectable } from '@angular/core';
import { AddonQtypeCalculatedHandler } from '@addon/qtype/calculated/providers/handler';
/**
* Handler to support numerical question type.
* This question type depends on calculated question type.
*/
@Injectable()
export class AddonQtypeNumericalHandler implements CoreQuestionHandler {
export class AddonQtypeNumericalHandler extends AddonQtypeCalculatedHandler {
name = 'AddonQtypeNumerical';
type = 'qtype_numerical';
constructor(private utils: CoreUtilsProvider) { }
/**
* Return the Component to use to display the question.
* It's recommended to return the class of the component, but you can also return an instance of the component.
*
* @param {Injector} injector Injector.
* @param {any} question The question to render.
* @return {any|Promise<any>} The component (or promise resolved with component) to use, undefined if not found.
*/
getComponent(injector: Injector, question: any): any | Promise<any> {
// Numerical behaves like a short answer, use the same component.
return AddonQtypeShortAnswerComponent;
}
/**
* Check if a response is complete.
*
* @param {any} question The question.
* @param {any} answers Object with the question answers (without prefix).
* @return {number} 1 if complete, 0 if not complete, -1 if cannot determine.
*/
isCompleteResponse(question: any, answers: any): number {
if (this.isGradableResponse(question, answers) === 0 || !this.validateUnits(answers['answer'])) {
return 0;
}
return -1;
}
/**
* Whether or not the handler is enabled on a site level.
*
* @return {boolean|Promise<boolean>} True or promise resolved with true if enabled.
*/
isEnabled(): boolean | Promise<boolean> {
return true;
}
/**
* Check if a student has provided enough of an answer for the question to be graded automatically,
* or whether it must be considered aborted.
*
* @param {any} question The question.
* @param {any} answers Object with the question answers (without prefix).
* @return {number} 1 if gradable, 0 if not gradable, -1 if cannot determine.
*/
isGradableResponse(question: any, answers: any): number {
return (answers['answer'] || answers['answer'] === '0' || answers['answer'] === 0) ? 1 : 0;
}
/**
* Check if two responses are the same.
*
* @param {any} question Question.
* @param {any} prevAnswers Object with the previous question answers.
* @param {any} newAnswers Object with the new question answers.
* @return {boolean} Whether they're the same.
*/
isSameResponse(question: any, prevAnswers: any, newAnswers: any): boolean {
return this.utils.sameAtKeyMissingIsBlank(prevAnswers, newAnswers, 'answer');
}
/**
* Validate a number with units. We don't have the list of valid units and conversions, so we can't perform
* a full validation. If this function returns true it means we can't be sure it's valid.
*
* @param {string} answer Answer.
* @return {boolean} False if answer isn't valid, true if we aren't sure if it's valid.
*/
validateUnits(answer: string): boolean {
if (!answer) {
return false;
}
const regexString = '[+-]?(?:\\d+(?:\\.\\d*)?|\\.\\d+)(?:e[-+]?\\d+)?';
// Strip spaces (which may be thousands separators) and change other forms of writing e to e.
answer = answer.replace(' ', '');
answer = answer.replace(/(?:e|E|(?:x|\*|×)10(?:\^|\*\*))([+-]?\d+)/, 'e$1');
// If a '.' is present or there are multiple ',' (i.e. 2,456,789) assume ',' is a thousands separator and stip it.
// Else assume it is a decimal separator, and change it to '.'.
if (answer.indexOf('.') != -1 || answer.split(',').length - 1 > 1) {
answer = answer.replace(',', '');
} else {
answer = answer.replace(',', '.');
}
// We don't know if units should be before or after so we check both.
if (answer.match(new RegExp('^' + regexString)) === null || answer.match(new RegExp(regexString + '$')) === null) {
return false;
}
return true;
}
}