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Preventing voting twice accept for changing vote.

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Ajay Ramachandran
2019-07-19 17:00:50 -04:00
parent 6850414a27
commit a0e63e7326
1 changed files with 48 additions and 17 deletions
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65
index.js
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@@ -140,26 +140,57 @@ app.get('/api/voteOnSponsorTime', function (req, res) {
return;
}
//-1 for downvote, 1 for upvote. Maybe more depending on reputation in the future
let incrementAmount = 0;
//check if vote has already happened
db.prepare("SELECT type FROM votes WHERE userID = ? AND UUID = ?").get(userID, UUID, function(err, row) {
if (err) console.log(err);
if (row != undefined && row.type == type) {
//they have already done this exact vote
res.status(405).send("Duplicate Vote");
return;
}
//don't use userID for now, and just add the vote
if (type == 1) {
//upvote
incrementAmount = 1;
} else if (type == 0) {
//downvote
incrementAmount = -1;
} else {
//unrecongnised type of vote
req.sendStatus(400);
return;
}
//-1 for downvote, 1 for upvote. Maybe more depending on reputation in the future
let incrementAmount = 0;
let oldIncrementAmount = 0;
db.prepare("UPDATE sponsorTimes SET votes = votes + ? WHERE UUID = ?").run(incrementAmount, UUID);
if (type == 1) {
//upvote
incrementAmount = 1;
} else if (type == 0) {
//downvote
incrementAmount = -1;
} else {
//unrecongnised type of vote
res.sendStatus(400);
return;
}
if (row != undefined) {
if (row.type == 1) {
//upvote
oldIncrementAmount = 1;
} else if (row.type == 0) {
//downvote
oldIncrementAmount = -1;
}
}
//added to db
res.sendStatus(200);
//update the votes table
if (row != undefined) {
db.prepare("UPDATE votes SET type = ? WHERE userID = ? AND UUID = ?").run(type, userID, UUID);
} else {
db.prepare("INSERT INTO votes VALUES(?, ?, ?)").run(userID, UUID, type);
}
//update the vote count on this sponsorTime
//oldIncrementAmount will be zero is row is null
db.prepare("UPDATE sponsorTimes SET votes = votes + ? WHERE UUID = ?").run(incrementAmount - oldIncrementAmount, UUID);
//update the votes table
//added to db
res.sendStatus(200);
});
});
app.get('/database.db', function (req, res) {