50 lines
1.4 KiB
JavaScript
50 lines
1.4 KiB
JavaScript
/*
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* Copyright (C) 2014 - present Instructure, Inc.
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*
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* This file is part of Canvas.
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*
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* Canvas is free software: you can redistribute it and/or modify it under
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* the terms of the GNU Affero General Public License as published by the Free
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* Software Foundation, version 3 of the License.
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*
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* Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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* A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Affero General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import numberHelper from 'jsx/shared/helpers/numberHelper'
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export default class QuizFormulaSolution {
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constructor(result) {
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this.result = result
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}
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rawValue() {
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return numberHelper.parse(this.rawText())
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}
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rawText() {
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if (this.result === null || this.result === undefined) {
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return 'NaN'
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}
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return this.result.substring(1).trim()
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}
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isValid() {
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return !!(this._wellFormedString() && this._appropriateSolutionValue())
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}
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_wellFormedString() {
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const result = this.result
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return !!(result.match(/^=/) && result != '= NaN' && result != '= Infinity')
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}
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_appropriateSolutionValue() {
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const rawVal = this.rawValue()
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return !!(rawVal == 0 || rawVal)
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}
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}
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