62 lines
1.9 KiB
TypeScript
62 lines
1.9 KiB
TypeScript
import { APIErrorCode, APIException } from "../model/interfaces.ts";
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import { db } from "../model/db.ts";
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export function castVote(dumpId: string, userId: string): number {
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try {
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db.exec("BEGIN;");
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db.prepare(
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`INSERT INTO votes (dump_id, user_id, created_at) VALUES (?, ?, ?);`,
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).run(dumpId, userId, new Date().toISOString());
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db.prepare(
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`UPDATE dumps SET vote_count = vote_count + 1 WHERE id = ?;`,
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).run(dumpId);
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const row = db.prepare(
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`SELECT vote_count FROM dumps WHERE id = ?;`,
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).get(dumpId) as { vote_count: number } | undefined;
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db.exec("COMMIT;");
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return row?.vote_count ?? 0;
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} catch (err) {
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db.exec("ROLLBACK;");
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if (err instanceof Error && err.message.includes("UNIQUE constraint")) {
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throw new APIException(
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APIErrorCode.VALIDATION_ERROR,
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409,
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"Already voted",
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);
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}
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throw err;
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}
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}
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export function removeVote(dumpId: string, userId: string): number {
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try {
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db.exec("BEGIN;");
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const result = db.prepare(
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`DELETE FROM votes WHERE dump_id = ? AND user_id = ?;`,
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).run(dumpId, userId);
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if (result.changes === 0) {
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db.exec("ROLLBACK;");
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throw new APIException(APIErrorCode.NOT_FOUND, 404, "Vote not found");
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}
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db.prepare(
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`UPDATE dumps SET vote_count = vote_count - 1 WHERE id = ?;`,
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).run(dumpId);
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const row = db.prepare(
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`SELECT vote_count FROM dumps WHERE id = ?;`,
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).get(dumpId) as { vote_count: number } | undefined;
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db.exec("COMMIT;");
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return row?.vote_count ?? 0;
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} catch (err) {
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if (err instanceof APIException) throw err;
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db.exec("ROLLBACK;");
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throw err;
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}
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}
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export function getUserVotes(userId: string): string[] {
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const rows = db.prepare(
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`SELECT dump_id FROM votes WHERE user_id = ?;`,
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).all(userId) as { dump_id: string }[];
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return rows.map((r) => r.dump_id);
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}
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