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added previous button, binding, and function #9

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Merged
merged 1 commit into from
Apr 22, 2017
Merged

added previous button, binding, and function #9

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6 changes: 3 additions & 3 deletions public/dist/js/bundle.min.js
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2 changes: 1 addition & 1 deletion public/dist/js/bundle.min.js.map
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2 changes: 1 addition & 1 deletion public/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@ <h1 class="site-heading">Practice JavaScript!</h1>
<div class="problem-group">
<div id="problem" class="problem">&zwnj;</div>
<div class="controls">
<!--<img id="prev-problem" class="prev-problem" src="./dist/img/previous.svg" alt="Previous problem" height="80">-->
<img id="prev-problem" class="prev-problem" src="./dist/img/previous.svg" alt="Previous problem" height="80">
<img id="shuffle-problems" class="shuffle-problems" src="./dist/img/shuffle.svg" alt="Shuffle problems" title="Shuffle problems" height="80">
<img id="next-problem" class="next-problem" src="./dist/img/next.svg" alt="Next problem" title="Next problem"height="80">
</div>
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27 changes: 24 additions & 3 deletions src/js/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,7 @@
const evalConsoleEl = document.getElementById('eval-output');
const assertConsoleEl = document.getElementById('assert-output');
const shuffleProblemsButtonEl = document.getElementById('shuffle-problems');
const previousProblemButtonEl = document.getElementById('prev-problem');
const nextProblemButtonEl = document.getElementById('next-problem');

// get indexes
Expand All @@ -79,6 +80,18 @@
return ind;
}

function getPreviousIndex(problemsArr) {
let probInd;
const currentIndex = config.currentIndex;
// if at beginning, go to end
if (currentIndex === 0) {
probInd = problemsArr.length - 1;
} else {
probInd = currentIndex - 1;
}
return probInd;
}

function getNextIndex(problemsArr) {
let probInd;
const currentIndex = config.currentIndex;
Expand All @@ -96,15 +109,22 @@
return problemsArr[config.currentIndex];
}

function previousProblem(e) {
console.log('previousProblem!');
config.currentIndex = config.shuffle
? getRandomIndex(problems)
: getPreviousIndex(problems);
updateLocalstore(config).then(_ => {
window.location.reload();
});
}

function nextProblem(e) {
console.log('nextProblem!');
config.currentIndex = config.shuffle
? getRandomIndex(problems)
: getNextIndex(problems);
console.log('config.currentIndex:', config.currentIndex);
updateLocalstore(config).then(_ => {
console.log('then reload!');
// loadProblem(currentProblem, true);
window.location.reload();
});
}
Expand Down Expand Up @@ -282,6 +302,7 @@
}
});
shuffleProblemsButtonEl.addEventListener('click', toggleShuffle);
previousProblemButtonEl.addEventListener('click', previousProblem);
nextProblemButtonEl.addEventListener('click', nextProblem);

// start it up!
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