Re: Displaying chat by punished users only to themselves (db fiddle attached)

[Alexander Farber]

Good morning, this is a very insightful comment (among many) by you, David -

On Wed, May 4, 2022 at 5:40 PM David G. Johnston <david.g.johns...@gmail.com>
wrote:

> Well, that is basically why I was going on about the oddity of having
> social be a part of the main query.  Personally I would write it as
> "myself.uid = in_uid", but you don't have an in_uid to reference.  Decide
> how you want to do something equivalent.
>
>
so I will rewrite the stored functions in my game to be like that, to
separate auth from functionality -

https://dbfiddle.uk/?rdbms=postgres_14&fiddle=dbdf1a6b82f7232be45e23b8139a8f0e

CREATE OR REPLACE FUNCTION words_get_uid(
                in_social integer,
                in_sid    text
        ) RETURNS integer AS
$func$
        SELECT uid
        FROM words_social
        WHERE social = in_social
        AND sid = in_sid;
$func$ LANGUAGE sql IMMUTABLE;

CREATE OR REPLACE FUNCTION words_get_chat(
                in_gid   integer,
                in_uid   integer
        ) RETURNS TABLE (
                out_mine integer,
                out_msg  text
        ) AS
$func$
        SELECT
                CASE WHEN c.uid = in_uid THEN 1 ELSE 0 END,
                c.msg
        FROM    words_chat c
        JOIN    words_games g USING (gid)
        JOIN    words_users opponent ON (opponent.uid IN (g.player1,
g.player2) AND opponent.uid <> in_uid)
        WHERE   c.gid = in_gid
        -- always show myself my own chat messages
        AND     c.uid = in_uid
        -- otherwise only show messages by not muted opponents
        OR      NOT opponent.muted
        ORDER BY c.created ASC;

$func$ LANGUAGE sql;

SELECT words_get_chat(10, words_get_uid(100, 'abc')) AS nice_user;

SELECT words_get_chat(10, words_get_uid(200, 'def')) AS muted_user;

Thanks
Alex