evergreen ranking functions

CREATE OR REPLACE FUNCTION evergreen.rank_cp_status(STATUS INT)
RETURNS INTEGER AS $$
    WITH totally_available AS (
        SELECT id, 0 AS avail_rank
        FROM config.copy_status
        WHERE opac_visible IS TRUE
            AND copy_active IS TRUE
            AND id != 1 -- "Checked out"
    ), almost_available AS (
        SELECT id, 10 AS avail_rank
        FROM config.copy_status
        WHERE holdable IS TRUE
            AND opac_visible IS TRUE
            AND copy_active IS FALSE
            OR id = 1 -- "Checked out"
    )
    SELECT COALESCE(
        (SELECT avail_rank FROM totally_available WHERE $1 IN (id)),
        (SELECT avail_rank FROM almost_available WHERE $1 IN (id)),
        100
    );
$$ LANGUAGE SQL STABLE;

CREATE OR REPLACE FUNCTION evergreen.ranked_volumes(
    bibid BIGINT[],
    ouid INT,
    depth INT DEFAULT NULL,
    slimit HSTORE DEFAULT NULL,
    soffset HSTORE DEFAULT NULL,
    pref_lib INT DEFAULT NULL,
    includes TEXT[] DEFAULT NULL::TEXT[]
) RETURNS TABLE (id BIGINT, name TEXT, label_sortkey TEXT, rank BIGINT) AS $$
    SELECT ua.id, ua.name, ua.label_sortkey, MIN(ua.rank) AS rank FROM (
        SELECT acn.id, aou.name, acn.label_sortkey,
            evergreen.rank_ou(aou.id, $2, $6), evergreen.rank_cp_status(acp.STATUS),
            RANK() OVER w
        FROM asset.call_number acn
            JOIN asset.copy acp ON (acn.id = acp.call_number)
            JOIN actor.org_unit_descendants( $2, COALESCE(
                $3, (
                    SELECT depth
                    FROM actor.org_unit_type aout
                        INNER JOIN actor.org_unit ou ON ou_type = aout.id
                    WHERE ou.id = $2
                ), $6)
            ) AS aou ON (acp.circ_lib = aou.id)
        WHERE acn.record = ANY ($1)
            AND acn.deleted IS FALSE
            AND acp.deleted IS FALSE
            AND CASE WHEN ('exclude_invisible_acn' = ANY($7)) THEN
                EXISTS (
                    SELECT 1
                    FROM asset.opac_visible_copies
                    WHERE copy_id = acp.id AND record = acn.record
                ) ELSE TRUE END
        GROUP BY acn.id, acp.STATUS, aou.name, acn.label_sortkey, aou.id
        WINDOW w AS (
            ORDER BY evergreen.rank_ou(aou.id, $2, $6), evergreen.rank_cp_status(acp.STATUS)
        )
    ) AS ua
    GROUP BY ua.id, ua.name, ua.label_sortkey
    ORDER BY rank, ua.name, ua.label_sortkey
    LIMIT ($4 -> 'acn')::INT
    OFFSET ($5 -> 'acn')::INT;
$$
LANGUAGE SQL STABLE;