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Question.vue
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Question.vue
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<template>
<!-- TODO deprecate all isValidQuestionType checks -->
<transition :name="questions ? 'question' : null">
<div v-if="active" :class="['card', 'question', shakeClass, addClass]">
<div v-if="$scopedSlots.header" class="card-header alert-light border-bottom border-light text-dark">
<slot name="header"></slot>
</div>
<div class="card-body">
<slot></slot>
<!-- Text Question textarea and answer -->
<div v-if="isTextQuestion()" class="mb-2">
<textarea
v-model="textareaText"
class="form-control"
:disabled="qState.answered"
></textarea>
<div v-if="qState.answered">
<hr />
<strong v-if="keywordsSplitTrimmed().length">
Keywords:
<span
v-for="keyword in keywordsSplitTrimmed()"
:key="keyword"
class="badge badge-pill badge-light font-weight-normal"
>
{{ keyword }}
</span>
</strong>
<strong v-else>No answer checking keywords provided</strong>
</div>
</div>
<!--
Gracefully deprecate invalid question types:
This allows the old "answer" slot to show for invalid question types, in addition to text questions
-->
<div v-if="qState.answered && !isMcqOrCheckboxQuestion()" class="answer">
<slot name="answer"></slot>
</div>
<!-- Hint -->
<box
v-if="showHint"
type="tip"
class="mb-0 mt-3"
>
<slot name="hint"></slot>
</box>
</div>
<!--
Gracefully deprecate invalid question types (isValidQuestionType):
This removes the footer for invalid question types,
where both the hint and check button has been clicked
-->
<div
v-if="showCardFooter"
class="card-footer alert-light border-top border-light text-dark"
>
<!--
Gracefully deprecate invalid question types (isValidQuestionType):
This hides the success / wrong circle for invalid question types
-->
<i
v-if="qState.state === 1 && isValidTypeAndNotTextWithoutKeywords()"
class="fa fa-times text-danger border-danger result-icon"
></i>
<i
v-else-if="qState.state === 2 && isValidTypeAndNotTextWithoutKeywords()"
class="fa fa-check text-success border-success result-icon"
></i>
<transition-group
name="q-btn"
tag="div"
class="float-right"
>
<button
v-if="$scopedSlots.hint && !showHint"
key="hint"
type="button"
class="btn btn-success q-btn ml-1"
@click="showHint = true"
>
Hint
</button>
<!-- Gracefully deprecate invalid question types without answers -->
<button
v-if="qState.state === 0 && !(!isValidTypeAndNotTextWithoutKeywords() && !$scopedSlots.answer)"
key="check"
type="button"
class="btn btn-primary q-btn ml-1"
@click="checkAnswer(!!questions)"
>
Check
</button>
<button
v-if="qState.state !== 0 && questions"
key="active"
type="button"
class="btn btn-primary q-btn ml-1"
@click="gotoNextQuestion"
>
Next
</button>
<button
v-if="retryState"
key="show"
type="button"
class="btn btn-info q-btn ml-1"
@click="checkAnswer(true)"
>
Show
</button>
<button
v-if="retryState"
key="retry"
type="button"
class="btn btn-primary q-btn ml-1"
@click="checkAnswer(false)"
>
Retry
</button>
</transition-group>
</div>
</div>
</transition>
</template>
<script>
import { STATE_CORRECT, STATE_FRESH, STATE_WRONG } from './QuestionConstants';
import QuizQuestionMixin from './QuizQuestionMixin';
export default {
name: 'Question',
mixins: [QuizQuestionMixin],
props: {
type: {
type: String,
default: '',
},
addClass: {
type: String,
default: null,
},
// Text question specific props
hasInput: { // Todo deprecate this
type: Boolean,
default: false,
},
keywords: {
type: String,
default: '',
},
threshold: { // The proportion of keywords needed to get the answer correct. Ranges from 0.0 to 1.0.
type: [
String, // to accomodate threshold prop being passed down as a string during SSR
Number,
],
default: 1.0,
},
},
computed: {
retryState() {
// ie. answered wrongly but hasn't clicked 'show' yet, and is not part of a quiz
return this.qState.state === STATE_WRONG && !this.qState.answered && !this.questions;
},
showCardFooter() {
// Hide the card footer when 'there are no more buttons to click',
// and the tick / cross circle is not shown
const isInvalidTypeOrTextWithoutKeyword = !this.isValidTypeAndNotTextWithoutKeywords();
const isHintNotProvidedOrIsShown = !this.$scopedSlots.hint || this.showHint;
return !(isInvalidTypeOrTextWithoutKeyword
&& isHintNotProvidedOrIsShown
&& this.qState.answered
&& !this.questions);
},
},
data() {
const defaultData = {
qState: {
state: STATE_FRESH,
answered: false,
},
showHint: false,
shakeClass: null,
};
if (this.isMcqOrCheckboxQuestion()) {
return {
answers: [],
...defaultData,
};
}
if (this.isTextQuestion()) {
return {
textareaText: '',
...defaultData,
};
}
return defaultData;
},
provide() {
if (this.isMcqOrCheckboxQuestion()) {
return {
answers: this.answers,
qOptionType: this.type,
qState: this.qState,
};
}
return undefined;
},
methods: {
keywordsSplitTrimmed() {
return this.keywords.split(',').filter(keyword => keyword.trim() !== '');
},
isMcqOrCheckboxQuestion() {
return this.type === 'mcq' || this.type === 'checkbox';
},
isTextQuestion() {
return this.type === 'text' || this.hasInput;
},
isValidQuestionType() {
return this.isMcqOrCheckboxQuestion() || this.isTextQuestion();
},
isValidTypeAndNotTextWithoutKeywords() {
return this.isValidQuestionType() && !(this.isTextQuestion() && !this.keywords);
},
markAsCorrect() {
this.qState.state = STATE_CORRECT;
this.qState.answered = true;
},
markAsWrong(markAsAnswered) {
this.qState.state = STATE_WRONG;
if (markAsAnswered) {
this.qState.answered = true;
} else {
// shake the card
this.shakeClass = 'shake';
setTimeout(() => {
this.shakeClass = null;
}, 800);
}
},
checkMcqAnswer(markAsAnsweredIfWrong) {
const selectedAnswer = this.answers.find(answer => answer.selected);
if (!selectedAnswer) {
return;
}
if (selectedAnswer.$props.correct) {
this.markAsCorrect();
} else {
this.markAsWrong(markAsAnsweredIfWrong);
}
},
checkCheckboxAnswer(markAsAnsweredIfWrong) {
const correctAnswers = this.answers.filter(answer => answer.answeredCorrectly);
if (correctAnswers.length === this.answers.length) {
this.markAsCorrect();
} else {
this.markAsWrong(markAsAnsweredIfWrong);
}
},
checkTextAnswer(markAsAnsweredIfWrong) {
// Todo deprecate this guard clause
if (!this.keywords.length) {
this.markAsCorrect();
return;
}
const lowerCasedText = this.textareaText.toLowerCase();
const keywords = this.keywordsSplitTrimmed();
let numMatching = 0;
for (let i = 0; i < keywords.length; i += 1) {
if (lowerCasedText.includes(keywords[i].toLowerCase())) {
numMatching += 1;
}
}
if (numMatching / keywords.length >= this.threshold) {
this.markAsCorrect();
} else {
this.markAsWrong(markAsAnsweredIfWrong);
}
},
checkAnswer(markAsAnsweredIfWrong) {
if (this.type === 'mcq') {
this.checkMcqAnswer(markAsAnsweredIfWrong);
} else if (this.type === 'checkbox') {
this.checkCheckboxAnswer(markAsAnsweredIfWrong);
} else if (this.isTextQuestion()) {
this.checkTextAnswer(markAsAnsweredIfWrong);
} else {
this.markAsCorrect();
}
},
},
};
</script>
<style scoped>
.result-icon {
display: inline-flex;
align-items: center;
justify-content: center;
height: 2em;
width: 2em;
border-width: 2px;
border-style: solid;
border-radius: 2em;
}
.question {
margin-bottom: 1rem;
transition: transform 0.5s ease-out, opacity 0.5s linear;
box-shadow: 0 2px 7px 5px rgba(210, 210, 210, 0.2);
}
.question-enter-active {
opacity: 0;
transform: translateX(-100%);
}
.question-leave-to {
opacity: 0;
transform: translateX(100%);
}
.q-btn {
border-radius: 2.5em;
transition: opacity 0.5s, transform 0.7s;
}
.q-btn-enter {
opacity: 0;
transform: translateY(30px);
}
.q-btn-leave-to {
opacity: 0;
transform: translateX(calc(-100% - 0.25rem));
}
.q-btn-leave-active {
position: absolute;
}
.card-header {
font-size: 1.05em;
font-weight: 500;
}
/* For accomodating block markdown nicely */
.card-header > :last-child,
.answer > :last-child {
margin-bottom: 0;
}
@keyframes shake {
20% { transform: translate(-1px, -1px); }
40% { transform: translate(1px, 1px); }
60% { transform: translate(0, 0); }
80% { transform: translate(-1px, 1px); }
100% { transform: translate(1px, -1px); }
}
.shake {
animation: shake 0.25s;
animation-iteration-count: 2;
}
/* text question text area */
textarea.form-control {
height: auto;
min-height: 75px;
margin-bottom: 10px;
}
</style>