-DECLARE
- x int8; -- quantized x from lon,
- y int8; -- quantized y from lat,
-BEGIN
- x := round(((scaled_lon / 10000000.0) + 180.0) * 65535.0 / 360.0);
- y := round(((scaled_lat / 10000000.0) + 90.0) * 65535.0 / 180.0);
-
- -- these bit-masks are special numbers used in the bit interleaving algorithm.
- -- see https://graphics.stanford.edu/~seander/bithacks.html#InterleaveBMN
- -- for the original algorithm and more details.
- x := (x | (x << 8)) & 16711935; -- 0x00FF00FF
- x := (x | (x << 4)) & 252645135; -- 0x0F0F0F0F
- x := (x | (x << 2)) & 858993459; -- 0x33333333
- x := (x | (x << 1)) & 1431655765; -- 0x55555555
-
- y := (y | (y << 8)) & 16711935; -- 0x00FF00FF
- y := (y | (y << 4)) & 252645135; -- 0x0F0F0F0F
- y := (y | (y << 2)) & 858993459; -- 0x33333333
- y := (y | (y << 1)) & 1431655765; -- 0x55555555
-
- RETURN (x << 1) | y;
-END;
-$$;
+ DECLARE
+ min_changes_per_hour int4 := 100;
+ initial_changes_per_hour int4 := 1000;
+ max_changes_per_hour int4 := 100000;
+ days_to_max_changes int4 := 7;
+ importer_changes_per_hour int4 := 1000000;
+ moderator_changes_per_hour int4 := 1000000;
+ roles text[];
+ last_block timestamp without time zone;
+ first_change timestamp without time zone;
+ active_reports int4;
+ time_since_first_change double precision;
+ max_changes double precision;
+ recent_changes int4;
+ BEGIN
+ SELECT ARRAY_AGG(user_roles.role) INTO STRICT roles FROM user_roles WHERE user_roles.user_id = api_rate_limit.user_id;
+
+ IF 'moderator' = ANY(roles) THEN
+ max_changes := moderator_changes_per_hour;
+ ELSIF 'importer' = ANY(roles) THEN
+ max_changes := importer_changes_per_hour;
+ ELSE
+ SELECT user_blocks.created_at INTO last_block FROM user_blocks WHERE user_blocks.user_id = api_rate_limit.user_id ORDER BY user_blocks.created_at DESC LIMIT 1;
+
+ IF FOUND THEN
+ SELECT changesets.created_at INTO first_change FROM changesets WHERE changesets.user_id = api_rate_limit.user_id AND changesets.created_at > last_block ORDER BY changesets.created_at LIMIT 1;
+ ELSE
+ SELECT changesets.created_at INTO first_change FROM changesets WHERE changesets.user_id = api_rate_limit.user_id ORDER BY changesets.created_at LIMIT 1;
+ END IF;
+
+ IF NOT FOUND THEN
+ first_change := CURRENT_TIMESTAMP AT TIME ZONE 'UTC';
+ END IF;
+
+ SELECT COUNT(*) INTO STRICT active_reports
+ FROM issues INNER JOIN reports ON reports.issue_id = issues.id
+ WHERE issues.reported_user_id = api_rate_limit.user_id AND issues.status = 'open' AND reports.updated_at >= COALESCE(issues.resolved_at, '1970-01-01');
+
+ time_since_first_change := EXTRACT(EPOCH FROM CURRENT_TIMESTAMP AT TIME ZONE 'UTC' - first_change);
+
+ max_changes := max_changes_per_hour * POWER(time_since_first_change, 2) / POWER(days_to_max_changes * 24 * 60 * 60, 2);
+ max_changes := GREATEST(initial_changes_per_hour, LEAST(max_changes_per_hour, FLOOR(max_changes)));
+ max_changes := max_changes / POWER(2, active_reports);
+ max_changes := GREATEST(min_changes_per_hour, LEAST(max_changes_per_hour, max_changes));
+ END IF;
+
+ SELECT COALESCE(SUM(changesets.num_changes), 0) INTO STRICT recent_changes FROM changesets WHERE changesets.user_id = api_rate_limit.user_id AND changesets.created_at >= CURRENT_TIMESTAMP AT TIME ZONE 'UTC' - '1 hour'::interval;
+
+ RETURN max_changes - recent_changes;
+ END;
+ $$;
projects / rails.git / blobdiff