stacker.news/prisma/migrations/20230914005420_variable_dow.../migration.sql

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2023-09-14 02:08:03 +00:00
DROP FUNCTION weighted_downvotes_after_act(item_id INTEGER, user_id INTEGER, sats INTEGER);
CREATE OR REPLACE FUNCTION weighted_downvotes_after_act(item_id INTEGER, user_id INTEGER, sats INTEGER) RETURNS INTEGER AS $$
DECLARE
user_trust DOUBLE PRECISION;
sats_past INTEGER;
multiplier DOUBLE PRECISION;
BEGIN
-- grab user's trust who is upvoting
SELECT trust INTO user_trust FROM users WHERE id = user_id;
-- in order to add this to weightedVotes, we need to do log((satsN+satsPrior)/satsPrior)
-- so compute sats prior
SELECT SUM(msats) / 1000 INTO sats_past
FROM "ItemAct"
WHERE "userId" = user_id AND "itemId" = item_id AND act IN ('DONT_LIKE_THIS');
IF sats_past IS NULL OR sats_past = 0 THEN
multiplier := LOG(sats);
ELSE
multiplier := LOG((sats+sats_past)/sats_past::FLOAT);
END IF;
-- update item
UPDATE "Item"
SET "weightedDownVotes" = "weightedDownVotes" + (user_trust * multiplier)
WHERE id = item_id AND "userId" <> user_id;
RETURN 0;
END;
$$ LANGUAGE plpgsql;
-- Update item_act to support multiple dont_like_this
CREATE OR REPLACE FUNCTION item_act(item_id INTEGER, user_id INTEGER, act "ItemActType", act_sats INTEGER)
RETURNS INTEGER
LANGUAGE plpgsql
AS $$
DECLARE
user_msats BIGINT;
act_msats BIGINT;
fee_msats BIGINT;
item_act_id INTEGER;
fwd_entry record; -- for loop iterator variable to iterate across forward recipients
fwd_msats BIGINT; -- for loop variable calculating how many msats to give each forward recipient
total_fwd_msats BIGINT := 0; -- accumulator to see how many msats have been forwarded for the act
BEGIN
PERFORM ASSERT_SERIALIZED();
act_msats := act_sats * 1000;
SELECT msats INTO user_msats FROM users WHERE id = user_id;
IF act_msats > user_msats THEN
RAISE EXCEPTION 'SN_INSUFFICIENT_FUNDS';
END IF;
-- deduct msats from actor
UPDATE users SET msats = msats - act_msats WHERE id = user_id;
IF act = 'TIP' THEN
-- call to influence weightedVotes ... we need to do this before we record the acts because
-- the priors acts are taken into account
PERFORM weighted_votes_after_tip(item_id, user_id, act_sats);
-- call to denormalize sats and commentSats
PERFORM sats_after_tip(item_id, user_id, act_msats);
-- take 10% and insert as FEE
fee_msats := CEIL(act_msats * 0.1);
act_msats := act_msats - fee_msats;
-- save the fee act into item_act_id so we can record referral acts
INSERT INTO "ItemAct" (msats, "itemId", "userId", act, created_at, updated_at)
VALUES (fee_msats, item_id, user_id, 'FEE', now_utc(), now_utc())
RETURNING id INTO item_act_id;
-- leave the rest as a tip
INSERT INTO "ItemAct" (msats, "itemId", "userId", act, created_at, updated_at)
VALUES (act_msats, item_id, user_id, 'TIP', now_utc(), now_utc());
-- denormalize bounty paid (if applicable)
PERFORM bounty_paid_after_act(item_id, user_id);
-- add sats to actees' balance and stacked count
FOR fwd_entry IN SELECT "userId", "pct" FROM "ItemForward" WHERE "itemId" = item_id
LOOP
-- fwd_msats represents the sats for this forward recipient from this particular tip action
fwd_msats := act_msats * fwd_entry.pct / 100;
-- keep track of how many msats have been forwarded, so we can give any remaining to OP
total_fwd_msats := fwd_msats + total_fwd_msats;
UPDATE users
SET msats = msats + fwd_msats, "stackedMsats" = "stackedMsats" + fwd_msats
WHERE id = fwd_entry."userId";
END LOOP;
-- Give OP any remaining msats after forwards have been applied
IF act_msats - total_fwd_msats > 0 THEN
UPDATE users
SET msats = msats + act_msats - total_fwd_msats, "stackedMsats" = "stackedMsats" + act_msats - total_fwd_msats
WHERE id = (SELECT "userId" FROM "Item" WHERE id = item_id);
END IF;
ELSE -- BOOST, POLL, DONT_LIKE_THIS, STREAM
-- call to influence if DONT_LIKE_THIS weightedDownVotes
IF act = 'DONT_LIKE_THIS' THEN
PERFORM weighted_downvotes_after_act(item_id, user_id, act_sats);
END IF;
INSERT INTO "ItemAct" (msats, "itemId", "userId", act, created_at, updated_at)
VALUES (act_msats, item_id, user_id, act, now_utc(), now_utc())
RETURNING id INTO item_act_id;
END IF;
-- store referral effects
PERFORM referral_act(item_act_id);
RETURN 0;
END;
$$;