Improve error handling of API (#4345)

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* Update attached_notes.ts

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* Refactor

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* Update call.ts

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* ✌️

* Fix

src/server/api/endpoints/notes/polls/vote.ts

@@ -9,6 +9,7 @@ import notify from '../../../../../services/create-notification';
 import define from '../../../define';
 import createNote from '../../../../../services/note/create';
 import User from '../../../../../models/user';
+import { ApiError } from '../../../error';
 
 export const meta = {
 	desc: {
@@ -33,24 +34,52 @@ export const meta = {
 		choice: {
 			validator: $.num
 		},
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: 'ecafbd2e-c283-4d6d-aecb-1a0a33b75396'
+		},
+
+		noPoll: {
+			message: 'The note does not attach a poll.',
+			code: 'NO_POLL',
+			id: '5f979967-52d9-4314-a911-1c673727f92f'
+		},
+
+		invalidChoice: {
+			message: 'Choice ID is invalid.',
+			code: 'INVALID_CHOICE',
+			id: 'e0cc9a04-f2e8-41e4-a5f1-4127293260cc'
+		},
+
+		alreadyVoted: {
+			message: 'You have already voted.',
+			code: 'ALREADY_VOTED',
+			id: '0963fc77-efac-419b-9424-b391608dc6d8'
+		},
 	}
 };
 
-export default define(meta, (ps, user) => new Promise(async (res, rej) => {
+export default define(meta, async (ps, user) => {
 	// Get votee
 	const note = await Note.findOne({
 		_id: ps.noteId
 	});
 
 	if (note === null) {
-		return rej('note not found');
+		throw new ApiError(meta.errors.noSuchNote);
 	}
 
 	if (note.poll == null) {
-		return rej('poll not found');
+		throw new ApiError(meta.errors.noPoll);
 	}
 
-	if (!note.poll.choices.some(x => x.id == ps.choice)) return rej('invalid choice param');
+	if (!note.poll.choices.some(x => x.id == ps.choice)) {
+		throw new ApiError(meta.errors.invalidChoice);
+	}
 
 	// if already voted
 	const exist = await Vote.findOne({
@@ -59,7 +88,7 @@ export default define(meta, (ps, user) => new Promise(async (res, rej) => {
 	});
 
 	if (exist !== null) {
-		return rej('already voted');
+		throw new ApiError(meta.errors.alreadyVoted);
 	}
 
 	// Create vote
@@ -70,9 +99,6 @@ export default define(meta, (ps, user) => new Promise(async (res, rej) => {
 		choice: ps.choice
 	});
 
-	// Send response
-	res();
-
 	const inc: any = {};
 	inc[`poll.choices.${note.poll.choices.findIndex(c => c.id == ps.choice)}.votes`] = 1;
 
@@ -132,4 +158,6 @@ export default define(meta, (ps, user) => new Promise(async (res, rej) => {
 			visibleUsers: [ pollOwner ],
 		});
 	}
-}));
+
+	return;
+});