X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/cebda5ffb9bc45171ddc6b4c4a25f14912fdad51..ad2e50fcfb7aab6cb6bbf5518920e4091be5b9a4:/lib/database_functions.rb

diff --git a/lib/database_functions.rb b/lib/database_functions.rb
index f9e09ac70..d58736fdf 100644
--- a/lib/database_functions.rb
+++ b/lib/database_functions.rb
@@ -55,4 +55,58 @@ module DatabaseFunctions
     END;
     $$ LANGUAGE plpgsql STABLE;
   ).freeze
+
+  API_SIZE_LIMIT = %(
+    CREATE OR REPLACE FUNCTION api_size_limit(user_id int8)
+      RETURNS int8
+      AS $$
+    DECLARE
+      min_size_limit int8 := #{Settings.min_size_limit};
+      initial_size_limit int8 := #{Settings.initial_size_limit};
+      max_size_limit int8 := #{Settings.max_size_limit};
+      days_to_max_size_limit int4 := #{Settings.days_to_max_size_limit};
+      importer_size_limit int8 := #{Settings.importer_size_limit};
+      moderator_size_limit int8 := #{Settings.moderator_size_limit};
+      roles text[];
+      last_block timestamp without time zone;
+      first_change timestamp without time zone;
+      active_reports int4;
+      time_since_first_change double precision;
+      size_limit int8;
+    BEGIN
+      SELECT ARRAY_AGG(user_roles.role) INTO STRICT roles FROM user_roles WHERE user_roles.user_id = api_size_limit.user_id;
+
+      IF 'moderator' = ANY(roles) THEN
+        size_limit := moderator_size_limit;
+      ELSIF 'importer' = ANY(roles) THEN
+        size_limit := importer_size_limit;
+      ELSE
+        SELECT user_blocks.created_at INTO last_block FROM user_blocks WHERE user_blocks.user_id = api_size_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_size_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_size_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_size_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);
+
+        size_limit := max_size_limit * POWER(time_since_first_change, 2) / POWER(days_to_max_size_limit * 24 * 60 * 60, 2);
+        size_limit := GREATEST(initial_size_limit, LEAST(max_size_limit, FLOOR(size_limit)));
+        size_limit := size_limit / POWER(2, active_reports);
+        size_limit := GREATEST(min_size_limit, LEAST(max_size_limit, size_limit));
+      END IF;
+
+      RETURN size_limit;
+    END;
+    $$ LANGUAGE plpgsql STABLE;
+  ).freeze
 end