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import { publishNoteStream } from '../../stream';
import { User } from '../../../models/entities/user';
import { Note } from '../../../models/entities/note';
import { PollVotes, NoteWatchings, Polls } from '../../../models';
import { Not } from 'typeorm';
import { genId } from '../../../misc/gen-id';
import { createNotification } from '../../create-notification';
export default async function(user: User, note: Note, choice: number) {
const poll = await Polls.findOne(note.id);
if (poll == null) throw new Error('poll not found');
// Check whether is valid choice
if (poll.choices[choice] == null) throw new Error('invalid choice param');
// if already voted
const exist = await PollVotes.find({
noteId: note.id,
userId: user.id
});
if (poll.multiple) {
if (exist.some(x => x.choice === choice)) {
throw new Error('already voted');
}
} else if (exist.length !== 0) {
throw new Error('already voted');
}
// Create vote
await PollVotes.insert({
id: genId(),
createdAt: new Date(),
noteId: note.id,
userId: user.id,
choice: choice
});
// Increment votes count
const index = choice + 1; // In SQL, array index is 1 based
await Polls.query(`UPDATE poll SET votes[${index}] = votes[${index}] + 1 WHERE "noteId" = '${poll.noteId}'`);
publishNoteStream(note.id, 'pollVoted', {
choice: choice,
userId: user.id
});
// Notify
createNotification(note.userId, 'pollVote', {
notifierId: user.id,
noteId: note.id,
choice: choice
});
// Fetch watchers
NoteWatchings.find({
noteId: note.id,
userId: Not(user.id),
})
.then(watchers => {
for (const watcher of watchers) {
createNotification(watcher.userId, 'pollVote', {
notifierId: user.id,
noteId: note.id,
choice: choice
});
}
});
}
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