END;
$func$ LANGUAGE plpgsql;
+CREATE OR REPLACE FUNCTION permission.usr_has_perm_at_nd(
+ user_id IN INTEGER,
+ perm_code IN TEXT
+)
+RETURNS SETOF INTEGER AS $$
+--
+-- Return a set of all the org units for which a given user has a given
+-- permission, granted directly (not through inheritance from a parent
+-- org unit).
+--
+-- The permissions apply to a minimum depth of the org unit hierarchy,
+-- for the org unit(s) to which the user is assigned. (They also apply
+-- to the subordinates of those org units, but we don't report the
+-- subordinates here.)
+--
+-- For purposes of this function, the permission.usr_work_ou_map table
+-- defines which users belong to which org units. I.e. we ignore the
+-- home_ou column of actor.usr.
+--
+-- The result set may contain duplicates, which should be eliminated
+-- by a DISTINCT clause.
+--
+DECLARE
+ b_super BOOLEAN;
+ n_perm INTEGER;
+ n_min_depth INTEGER;
+ n_work_ou INTEGER;
+ n_curr_ou INTEGER;
+ n_depth INTEGER;
+ n_curr_depth INTEGER;
+BEGIN
+ --
+ -- Check for superuser
+ --
+ SELECT INTO b_super
+ super_user
+ FROM
+ actor.usr
+ WHERE
+ id = user_id;
+ --
+ IF NOT FOUND THEN
+ return; -- No user? No permissions.
+ ELSIF b_super THEN
+ --
+ -- Super user has all permissions everywhere
+ --
+ FOR n_work_ou IN
+ SELECT
+ id
+ FROM
+ actor.org_unit
+ WHERE
+ parent_ou IS NULL
+ LOOP
+ RETURN NEXT n_work_ou;
+ END LOOP;
+ RETURN;
+ END IF;
+ --
+ -- Translate the permission name
+ -- to a numeric permission id
+ --
+ SELECT INTO n_perm
+ id
+ FROM
+ permission.perm_list
+ WHERE
+ code = perm_code;
+ --
+ IF NOT FOUND THEN
+ RETURN; -- No such permission
+ END IF;
+ --
+ -- Find the highest-level org unit (i.e. the minimum depth)
+ -- to which the permission is applied for this user
+ --
+ -- This query is modified from the one in permission.usr_perms().
+ --
+ SELECT INTO n_min_depth
+ min( depth )
+ FROM (
+ SELECT depth
+ FROM permission.usr_perm_map upm
+ WHERE upm.usr = user_id
+ AND (upm.perm = n_perm OR upm.perm = -1)
+ UNION
+ SELECT gpm.depth
+ FROM permission.grp_perm_map gpm
+ WHERE (gpm.perm = n_perm OR gpm.perm = -1)
+ AND gpm.grp IN (
+ SELECT (permission.grp_ancestors(
+ (SELECT profile FROM actor.usr WHERE id = user_id)
+ )).id
+ )
+ UNION
+ SELECT p.depth
+ FROM permission.grp_perm_map p
+ WHERE (p.perm = n_perm OR p.perm = -1)
+ AND p.grp IN (
+ SELECT (permission.grp_ancestors(m.grp)).id
+ FROM permission.usr_grp_map m
+ WHERE m.usr = user_id
+ )
+ ) AS x;
+ --
+ IF NOT FOUND THEN
+ RETURN; -- No such permission for this user
+ END IF;
+ --
+ -- Identify the org units to which the user is assigned. Note that
+ -- we pay no attention to the home_ou column in actor.usr.
+ --
+ FOR n_work_ou IN
+ SELECT
+ work_ou
+ FROM
+ permission.usr_work_ou_map
+ WHERE
+ usr = user_id
+ LOOP -- For each org unit to which the user is assigned
+ --
+ -- Determine the level of the org unit by a lookup in actor.org_unit_type.
+ -- We take it on faith that this depth agrees with the actual hierarchy
+ -- defined in actor.org_unit.
+ --
+ SELECT INTO n_depth
+ type.depth
+ FROM
+ actor.org_unit_type type
+ INNER JOIN actor.org_unit ou
+ ON ( ou.ou_type = type.id )
+ WHERE
+ ou.id = n_work_ou;
+ --
+ IF NOT FOUND THEN
+ CONTINUE; -- Maybe raise exception?
+ END IF;
+ --
+ -- Compare the depth of the work org unit to the
+ -- minimum depth, and branch accordingly
+ --
+ IF n_depth = n_min_depth THEN
+ --
+ -- The org unit is at the right depth, so return it.
+ --
+ RETURN NEXT n_work_ou;
+ ELSIF n_depth > n_min_depth THEN
+ --
+ -- Traverse the org unit tree toward the root,
+ -- until you reach the minimum depth determined above
+ --
+ n_curr_depth := n_depth;
+ n_curr_ou := n_work_ou;
+ WHILE n_curr_depth > n_min_depth LOOP
+ SELECT INTO n_curr_ou
+ parent_ou
+ FROM
+ actor.org_unit
+ WHERE
+ id = n_curr_ou;
+ --
+ IF FOUND THEN
+ n_curr_depth := n_curr_depth - 1;
+ ELSE
+ --
+ -- This can happen only if the hierarchy defined in
+ -- actor.org_unit is corrupted, or out of sync with
+ -- the depths defined in actor.org_unit_type.
+ -- Maybe we should raise an exception here, instead
+ -- of silently ignoring the problem.
+ --
+ n_curr_ou = NULL;
+ EXIT;
+ END IF;
+ END LOOP;
+ --
+ IF n_curr_ou IS NOT NULL THEN
+ RETURN NEXT n_curr_ou;
+ END IF;
+ ELSE
+ --
+ -- The permission applies only at a depth greater than the work org unit.
+ -- Use connectby() to find all dependent org units at the specified depth.
+ --
+ FOR n_curr_ou IN
+ SELECT ou::INTEGER
+ FROM connectby(
+ 'actor.org_unit', -- table name
+ 'id', -- key column
+ 'parent_ou', -- recursive foreign key
+ n_work_ou::TEXT, -- id of starting point
+ (n_min_depth - n_depth) -- max depth to search, relative
+ ) -- to starting point
+ AS t(
+ ou text, -- dependent org unit
+ parent_ou text, -- (ignore)
+ level int -- depth relative to starting point
+ )
+ WHERE
+ level = n_min_depth - n_depth
+ LOOP
+ RETURN NEXT n_curr_ou;
+ END LOOP;
+ END IF;
+ --
+ END LOOP;
+ --
+ RETURN;
+ --
+END;
+$$ LANGUAGE 'plpgsql';
+
+
COMMIT;
-- Ability to import a record with a different TCN
projects / Evergreen.git / commitdiff