From e3084567e0c290b79719db0b1ca8e5510419f515 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Mon, 21 Feb 2022 22:51:43 +0100
Subject: [PATCH] Center rotary used for rainbow brightness

---
 ursaryd.c | 46 +++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 45 insertions(+), 1 deletion(-)

diff --git a/ursaryd.c b/ursaryd.c
index 748ddc3..85cde2b 100644
--- a/ursaryd.c
+++ b/ursaryd.c
@@ -39,7 +39,7 @@
  *	6	Albireo Zoom	mute		MPD prev
  *	7	eveyrhing else	mute		MPD next
  *
- *	center	-
+ *	center	rainbow brightness
  *	slider	light color temperature
  */
 
@@ -567,6 +567,31 @@ static void update_lights_from_button(int ch, int on)
     }
 }
 
+/*** Rainbow ***/
+
+static double rainbow_brightness;
+static timestamp_t rainbow_last_update;
+
+static void update_rainbow(void)
+{
+  noct_set_ring(8, RING_MODE_LEFT, rainbow_brightness * 127);
+}
+
+static void send_rainbow(void)
+{
+  char val[100];
+  snprintf(val, sizeof(val), "%.3f", rainbow_brightness);
+  mqtt_publish("burrow/lights/rainbow/brightness", val);
+  rainbow_last_update = main_get_now();
+  update_rainbow();
+}
+
+static void update_rainbow_from_rotary(int delta)
+{
+  rainbow_brightness = CLAMP(rainbow_brightness + 0.015*delta*abs(delta), 0., 1.);
+  send_rainbow();
+}
+
 /*** Main update routines ***/
 
 static struct main_timer update_timer;
@@ -672,6 +697,7 @@ static void do_update(struct main_timer *t)
   update_source_buttons();
   update_mpd();
   update_lights();
+  update_rainbow();
 }
 
 void schedule_update(void)
@@ -716,6 +742,9 @@ void notify_rotary(int rotary, int delta)
     case 3:
       update_lights_from_rotary(0, delta);
       break;
+    case 8:
+      update_rainbow_from_rotary(delta);
+      break;
     case 9:
       update_lights_from_slider(delta);
       break;
@@ -813,6 +842,21 @@ void notify_mqtt(const char *topic, const char *val)
 	  update_lights();
 	}
     }
+
+  if (!strcmp(topic, "burrow/lights/rainbow/brightness"))
+    {
+      double b;
+      if (sscanf(val, "%lf", &b) == 1 && b >= 0 && b <= 1)
+	{
+	  timestamp_t now = main_get_now();
+	  if (!rainbow_last_update || rainbow_last_update + 1000 < now)
+	    {
+	      DBG("Received foreign rainbow settings");
+	      rainbow_brightness = b;
+	      update_rainbow();
+	    }
+	}
+    }
 }
 
 /*** Main entry point ***/
-- 
2.39.2