48 lines
1.6 KiB
PL/PgSQL
48 lines
1.6 KiB
PL/PgSQL
CREATE OR REPLACE FUNCTION create_item(title TEXT, url TEXT, text TEXT, boost INTEGER, parent_id INTEGER, user_id INTEGER)
|
|
RETURNS "Item"
|
|
LANGUAGE plpgsql
|
|
AS $$
|
|
DECLARE
|
|
user_msats INTEGER;
|
|
cost INTEGER;
|
|
free_posts INTEGER;
|
|
free_comments INTEGER;
|
|
freebie BOOLEAN;
|
|
item "Item";
|
|
BEGIN
|
|
PERFORM ASSERT_SERIALIZED();
|
|
|
|
SELECT msats, "freePosts", "freeComments"
|
|
INTO user_msats, free_posts, free_comments
|
|
FROM users WHERE id = user_id;
|
|
|
|
freebie := (parent_id IS NULL AND free_posts > 0) OR (parent_id IS NOT NULL AND free_comments > 0);
|
|
SELECT 1000 * POWER(10, COUNT(*)) INTO cost FROM "Item" WHERE "parentId" = parent_id AND "userId" = user_id;
|
|
|
|
IF NOT freebie AND cost > user_msats THEN
|
|
RAISE EXCEPTION 'SN_INSUFFICIENT_FUNDS';
|
|
END IF;
|
|
|
|
INSERT INTO "Item" (title, url, text, "userId", "parentId", created_at, updated_at)
|
|
VALUES (title, url, text, user_id, parent_id, now_utc(), now_utc()) RETURNING * INTO item;
|
|
|
|
IF freebie THEN
|
|
IF parent_id IS NULL THEN
|
|
UPDATE users SET "freePosts" = "freePosts" - 1 WHERE id = user_id;
|
|
ELSE
|
|
UPDATE users SET "freeComments" = "freeComments" - 1 WHERE id = user_id;
|
|
END IF;
|
|
ELSE
|
|
UPDATE users SET msats = msats - cost WHERE id = user_id;
|
|
|
|
INSERT INTO "ItemAct" (sats, "itemId", "userId", act, created_at, updated_at)
|
|
VALUES (cost / 1000, item.id, user_id, 'VOTE', now_utc(), now_utc());
|
|
END IF;
|
|
|
|
IF boost > 0 THEN
|
|
PERFORM item_act(item.id, user_id, 'BOOST', boost);
|
|
END IF;
|
|
|
|
RETURN item;
|
|
END;
|
|
$$; |