Fix listener minutes tracking for accurate geo stats

- Add register-web-listener to now-playing-json API endpoint
  This keeps listeners registered during continuous playback instead of
  timing out after 5 minutes of inactivity

- Fix listen_minutes calculation to increment by listener_count per poll
  Previously incremented by 1 regardless of how many listeners, now properly
  tracks listener-minutes (1 minute per listener per 60s poll interval)

- Add migration 009 documenting the calculation fix

frontend-partials.lisp

@@ -138,6 +138,8 @@
 (define-api-with-limit asteroid/partial/now-playing-json (&optional mount) (:limit 2 :timeout 1)
   "Get JSON with now playing info including track ID for favorites.
    Optional MOUNT parameter specifies which stream to get metadata from."
+  ;; Register web listener for geo stats (keeps listener active during playback)
+  (register-web-listener)
   (with-error-handling
     (let* ((mount-name (or mount "asteroid.mp3"))
            (now-playing-stats (icecast-now-playing *stream-base-url* mount-name)))

listener-stats.lisp

@@ -268,18 +268,18 @@
 (defun update-geo-stats (country-code listener-count &optional city)
   "Update geo stats for today, optionally including city.
    listener_count tracks peak concurrent listeners (max seen today).
-   listen_minutes increments by 1 per poll (approximates total listen time)."
+   listen_minutes increments by listener_count per poll (1 minute per listener per poll)."
   (when country-code
     (handler-case
         (with-db
           (let ((city-sql (if city (format nil "'~a'" city) "NULL")))
             (postmodern:execute
              (format nil "INSERT INTO listener_geo_stats (date, country_code, city, listener_count, listen_minutes)
-                        VALUES (CURRENT_DATE, '~a', ~a, ~a, 1)
+                        VALUES (CURRENT_DATE, '~a', ~a, ~a, ~a)
                         ON CONFLICT (date, country_code, city) 
                         DO UPDATE SET listener_count = GREATEST(listener_geo_stats.listener_count, ~a),
-                                      listen_minutes = listener_geo_stats.listen_minutes + 1"
-                     country-code city-sql listener-count listener-count))))
+                                      listen_minutes = listener_geo_stats.listen_minutes + ~a"
+                     country-code city-sql listener-count listener-count listener-count listener-count))))
       (error (e)
         (log:error "Failed to update geo stats: ~a" e)))))
 

migrations/009-fix-listen-minutes-calculation.sql

@@ -0,0 +1,28 @@
+-- Migration: Fix Listen Minutes Calculation
+-- Version: 009
+-- Date: 2026-01-11
+-- Description: Document the fix for listen_minutes calculation
+--
+-- ISSUE: listen_minutes was incrementing by 1 per poll regardless of listener count.
+--        This meant a country with 5 listeners for 1 hour would only show 60 minutes,
+--        not 300 listener-minutes.
+--
+-- FIX: Application code in listener-stats.lisp now increments listen_minutes by
+--      the listener_count value (1 minute per listener per poll interval).
+--
+-- ADDITIONAL FIX: register-web-listener is now called from the now-playing-json API
+--                 endpoint, keeping listeners registered during continuous playback
+--                 instead of timing out after 5 minutes.
+--
+-- No schema changes required - this migration documents the application logic fix.
+
+-- Add a comment to the table for future reference
+COMMENT ON COLUMN listener_geo_stats.listen_minutes IS 
+    'Total listener-minutes: increments by listener_count per poll (1 min per listener per 60s poll)';
+
+-- Success message
+DO $$
+BEGIN
+    RAISE NOTICE 'Migration 009: listen_minutes calculation fix documented';
+    RAISE NOTICE 'listen_minutes now represents true listener-minutes (count * time)';
+END $$;