47 lines
2.0 KiB
MySQL
47 lines
2.0 KiB
MySQL
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CREATE OR REPLACE FUNCTION run_auction(item_id INTEGER) RETURNS void AS $$
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DECLARE
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bid INTEGER;
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user_id INTEGER;
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user_msats INTEGER;
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item_status "Status";
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status_updated_at timestamp(3);
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BEGIN
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PERFORM ASSERT_SERIALIZED();
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-- extract data we need
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SELECT "maxBid" * 1000, "userId", status, "statusUpdatedAt" INTO bid, user_id, item_status, status_updated_at FROM "Item" WHERE id = item_id;
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SELECT msats INTO user_msats FROM users WHERE id = user_id;
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-- 0 bid items expire after 30 days unless updated
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IF bid = 0 THEN
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IF item_status <> 'STOPPED' THEN
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IF status_updated_at < now_utc() - INTERVAL '30 days' THEN
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UPDATE "Item" SET status = 'STOPPED', "statusUpdatedAt" = now_utc() WHERE id = item_id;
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ELSEIF item_status = 'NOSATS' THEN
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UPDATE "Item" SET status = 'ACTIVE' WHERE id = item_id;
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END IF;
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END IF;
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RETURN;
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END IF;
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-- check if user wallet has enough sats
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IF bid > user_msats THEN
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-- if not, set status = NOSATS and statusUpdatedAt to now_utc if not already set
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IF item_status <> 'NOSATS' THEN
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UPDATE "Item" SET status = 'NOSATS', "statusUpdatedAt" = now_utc() WHERE id = item_id;
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END IF;
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ELSE
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-- if so, deduct from user
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UPDATE users SET msats = msats - bid WHERE id = user_id;
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-- create an item act
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INSERT INTO "ItemAct" (sats, "itemId", "userId", act, created_at, updated_at)
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VALUES (bid / 1000, item_id, user_id, 'STREAM', now_utc(), now_utc());
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-- update item status = ACTIVE and statusUpdatedAt = now_utc if NOSATS
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IF item_status = 'NOSATS' THEN
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UPDATE "Item" SET status = 'ACTIVE', "statusUpdatedAt" = now_utc() WHERE id = item_id;
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END IF;
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END IF;
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END;
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$$ LANGUAGE plpgsql;
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