feat: initial commit

queries/functions/update_days_read.psql

@@ -0,0 +1,26 @@
+CREATE OR REPLACE FUNCTION update_days_read()
+RETURNS TRIGGER AS $$
+DECLARE
+  pacific_now TIMESTAMPTZ;
+  pacific_today DATE;
+  last_read DATE;
+BEGIN
+  SELECT (NOW() AT TIME ZONE 'America/Los_Angeles')::DATE INTO pacific_today;
+
+  SELECT COALESCE(last_read_date::DATE, pacific_today - INTERVAL '1 day') INTO last_read FROM reading_streak LIMIT 1;
+
+  IF last_read < pacific_today - INTERVAL '1 day' THEN
+    UPDATE reading_streak
+    SET days_read = 0, last_read_date = NOW() AT TIME ZONE 'America/Los_Angeles'
+    WHERE id = 1;
+  END IF;
+
+  IF last_read IS DISTINCT FROM pacific_today THEN
+    UPDATE reading_streak
+    SET days_read = days_read + 1, last_read_date = NOW() AT TIME ZONE 'America/Los_Angeles'
+    WHERE id = 1;
+  END IF;
+
+  RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;