Add fallback alarm

src/c/main.c

@@ -2,12 +2,12 @@
 #include <pebble.h>
 
 // types
-typedef struct SetterTime {
+typedef struct TheTime {
 	uint8_t HourWIP;
 	uint8_t MinuteWIP;
 	uint8_t HourSet;
 	uint8_t MinuteSet;
-} __attribute__((__packed__)) SetterTime;
+} __attribute__((__packed__)) TheTime;
 
 // layer-age
 static Window *s_window;
@@ -30,7 +30,7 @@ static GBitmap *s_check_bmp;
 // global vars
 //// setter
 static uint8_t s_highlight_pos = 0;
-static struct SetterTime s_setter_time;
+static struct TheTime s_the_time;
 
 // constants
 //// setter
@@ -42,24 +42,49 @@ static const GColor s_highlight_color = GColorMediumAquamarine;
 
 /////////////////////////////////
 
-static void glance_reload_callback(AppGlanceReloadSession *session, size_t limit, void *context) {
+static void glance_reload_callback(AppGlanceReloadSession *session, size_t limit, void *target) {
 	static char s_glance_buffer[11];
-	snprintf(s_glance_buffer, sizeof(s_glance_buffer), "Up @ %02d:%02d", s_setter_time.HourSet, s_setter_time.MinuteSet);
+	snprintf(s_glance_buffer, sizeof(s_glance_buffer), "Up @ %02d:%02d", s_the_time.HourSet, s_the_time.MinuteSet);
 	AppGlanceSlice slice = {
-	    .expiration_time = time(NULL) + (7 * SECONDS_PER_DAY),
+	    .expiration_time = (time_t)(uintptr_t)target,
 	    .layout.icon = APP_GLANCE_SLICE_DEFAULT_ICON,
 	    .layout.subtitle_template_string = s_glance_buffer,
 	};
 	app_glance_add_slice(session, slice);
 }
 
+// returns (passes through) the negative value from wakeup_schedule
+// when an error is encountered
+static int8_t schedule_main_alarm() {
+	time_t now = time(NULL);
+	struct tm now_tm = *localtime(&now);
+	struct tm target_tm = now_tm;
+	target_tm.tm_hour = s_the_time.HourWIP;
+	target_tm.tm_min = s_the_time.MinuteWIP;
+	target_tm.tm_sec = 0;
+	time_t target = mktime(&target_tm);
+	if (target <= now) {
+		target += SECONDS_PER_DAY;
+	}
+	wakeup_cancel_all();
+	WakeupId status = wakeup_schedule(target, 0, true);
+	if (status < 0) {
+		APP_LOG(APP_LOG_LEVEL_DEBUG, "SCHEDULING ERROR: %d", status);
+		return status;
+	}
+	s_the_time.HourSet = s_the_time.HourWIP;
+	s_the_time.MinuteSet = s_the_time.MinuteWIP;
+	app_glance_reload(glance_reload_callback, (void *)(uintptr_t)target);
+	return 0;
+}
+
 static void setter_seconds_handler(struct tm *tick_time, TimeUnits units_changed) {
 	struct tm now_tm = *tick_time;
 
 	// build the target time today
 	struct tm target_tm = now_tm;
-	target_tm.tm_hour = s_setter_time.HourSet;
+	target_tm.tm_hour = s_the_time.HourSet;
-	target_tm.tm_min = s_setter_time.MinuteSet;
+	target_tm.tm_min = s_the_time.MinuteSet;
 	target_tm.tm_sec = 0;
 
 	time_t now = mktime(&now_tm);
@@ -88,24 +113,24 @@ static void update_countdown_display() {
 
 static void update_setter_display() {
 	static char s_setter_buffer[PBL_IF_ROUND_ELSE(8, 12)];
-	snprintf(s_setter_buffer, sizeof(s_setter_buffer), PBL_IF_ROUND_ELSE("%02d : %02d", "%02d   :   %02d"), s_setter_time.HourWIP, s_setter_time.MinuteWIP);
+	snprintf(s_setter_buffer, sizeof(s_setter_buffer), PBL_IF_ROUND_ELSE("%02d : %02d", "%02d   :   %02d"), s_the_time.HourWIP, s_the_time.MinuteWIP);
 	text_layer_set_text(s_setter_txt_layer, s_setter_buffer);
 }
 
 static void setter_up_click_handler(void *recognizer, void *ctx) {
 	switch (s_highlight_pos) {
 	case 0:
-		if (s_setter_time.HourWIP == 23) {
+		if (s_the_time.HourWIP == 23) {
-			s_setter_time.HourWIP = 0;
+			s_the_time.HourWIP = 0;
 		} else {
-			s_setter_time.HourWIP++;
+			s_the_time.HourWIP++;
 		}
 		break;
 	case 1:
-		if (s_setter_time.MinuteWIP == 59) {
+		if (s_the_time.MinuteWIP == 59) {
-			s_setter_time.MinuteWIP = 0;
+			s_the_time.MinuteWIP = 0;
 		} else {
-			s_setter_time.MinuteWIP++;
+			s_the_time.MinuteWIP++;
 		}
 		break;
 	default:
@@ -117,17 +142,17 @@ static void setter_up_click_handler(void *recognizer, void *ctx) {
 static void setter_down_click_handler(void *recognizer, void *ctx) {
 	switch (s_highlight_pos) {
 	case 0:
-		if (s_setter_time.HourWIP == 0) {
+		if (s_the_time.HourWIP == 0) {
-			s_setter_time.HourWIP = 23;
+			s_the_time.HourWIP = 23;
 		} else {
-			s_setter_time.HourWIP--;
+			s_the_time.HourWIP--;
 		}
 		break;
 	case 1:
-		if (s_setter_time.MinuteWIP == 0) {
+		if (s_the_time.MinuteWIP == 0) {
-			s_setter_time.MinuteWIP = 59;
+			s_the_time.MinuteWIP = 59;
 		} else {
-			s_setter_time.MinuteWIP--;
+			s_the_time.MinuteWIP--;
 		}
 		break;
 	default:
@@ -138,42 +163,20 @@ static void setter_down_click_handler(void *recognizer, void *ctx) {
 
 static void setter_select_click_handler(void *recognizer, void *ctx) {
 	if (s_highlight_pos == 2) {
-		// schedule wakeup
+		int8_t status = schedule_main_alarm();
-		time_t now = time(NULL);
+		if (status < 0) {
-		struct tm now_tm = *localtime(&now);
+			return; // early return to avoid indicating alarm was set when it was not
-		struct tm target_tm = now_tm;
-		target_tm.tm_hour = s_setter_time.HourWIP;
-		target_tm.tm_min = s_setter_time.MinuteWIP;
-		target_tm.tm_sec = 0;
-		time_t target = mktime(&target_tm);
-		if (target <= now) {
-			target += SECONDS_PER_DAY;
-		}
-		wakeup_cancel_all();
-		WakeupId status;
-		for (int i = 0; i < 8; ++i) {
-			status = wakeup_schedule(target, 0, true);
-			if (status < 0) {
-				APP_LOG(APP_LOG_LEVEL_DEBUG, "SCHEDULING ERROR: %d", status);
-				return;
-			}
-			target += SECONDS_PER_DAY;
 		}
 
 		// persist
-		s_setter_time.HourSet = s_setter_time.HourWIP;
+		persist_write_int(STORAGE_KEY_ALARM_HOUR, s_the_time.HourSet);
-		s_setter_time.MinuteSet = s_setter_time.MinuteWIP;
+		persist_write_int(STORAGE_KEY_ALARM_MINUTE, s_the_time.MinuteSet);
-		persist_write_int(STORAGE_KEY_ALARM_HOUR, s_setter_time.HourSet);
-		persist_write_int(STORAGE_KEY_ALARM_MINUTE, s_setter_time.MinuteSet);
 
 		// update countdown immediately
 		update_countdown_display();
 
 		// move selection back to start
 		s_highlight_pos = 0;
-
-		// set app glance
-		app_glance_reload(glance_reload_callback, NULL);
 	} else {
 		s_highlight_pos++;
 	}
@@ -183,7 +186,7 @@ static void setter_select_click_handler(void *recognizer, void *ctx) {
 
 static void setter_back_click_handler(void *recognizer, void *ctx) {
 	if (s_highlight_pos == 0) {
-		window_stack_pop_all(true); // exit app
+		window_stack_pop_all(true);
 	} else {
 		s_highlight_pos--;
 	}
@@ -224,11 +227,6 @@ static void highlight_layer_update_proc(Layer *layer, GContext *ctx) {
 }
 
 static void setter_window_load() {
-	s_setter_time.HourSet = persist_read_int(STORAGE_KEY_ALARM_HOUR);
-	s_setter_time.MinuteSet = persist_read_int(STORAGE_KEY_ALARM_MINUTE);
-	s_setter_time.HourWIP = s_setter_time.HourSet;
-	s_setter_time.MinuteWIP = s_setter_time.MinuteSet;
-
 	Layer *window_layer = window_get_root_layer(s_window);
 
 	// top&bottom bars
@@ -293,7 +291,23 @@ static void setter_window_unload() {
 	layer_destroy(s_top_bar_layer);
 }
 
+static void schedule_fallback_alarm() {
+	wakeup_cancel_all();
+	time_t target_time = time(NULL);
+	WakeupId status;
+	while (true) {
+		target_time += 15;
+		status = wakeup_schedule(target_time, 0, true);
+		if (status >= 0) {
+			break;
+		}
+	}
+}
+
 static void alarm_seconds_handler(struct tm *tick_time, TimeUnits units_changed) {
+	if (tick_time->tm_sec % 15 == 0) {
+		schedule_fallback_alarm();
+	}
 	vibes_short_pulse();
 }
 
@@ -307,6 +321,7 @@ static void alarm_window_load() {
 	text_layer_set_text(s_alarm_txt_layer, "IMAGINE THIS IS A TRIANGLE");
 	layer_add_child(window_layer, text_layer_get_layer(s_alarm_txt_layer));
 
+	schedule_fallback_alarm();
 	tick_timer_service_subscribe(SECOND_UNIT, alarm_seconds_handler);
 }
 
@@ -314,12 +329,35 @@ static void alarm_window_unload() {
 	text_layer_destroy(s_alarm_txt_layer);
 }
 
+// DEBUG: logic will eventually be mapped to when triangle is solved
+static void alarm_select_click_handler(void *recognizer, void *ctx) {
+	wakeup_cancel_all();
+	int8_t status = schedule_main_alarm();
+	while (status < 0) {
+		s_the_time.MinuteWIP++;
+		if (s_the_time.MinuteWIP >= 60) {
+			s_the_time.MinuteWIP = 0;
+			s_the_time.HourWIP++;
+			if (s_the_time.HourWIP >= 24) {
+				s_the_time.HourWIP = 0;
+			}
+		}
+		status = schedule_main_alarm();
+	}
+	window_stack_pop_all(true);
+}
+
 static void alarm_click_config_provider(void *ctx) {
 	window_single_click_subscribe(BUTTON_ID_BACK, NULL);
+	window_long_click_subscribe(BUTTON_ID_SELECT, 5000, alarm_select_click_handler, NULL);
 }
 
 static void init() {
 	s_window = window_create();
+	s_the_time.HourWIP = persist_read_int(STORAGE_KEY_ALARM_HOUR);
+	s_the_time.MinuteWIP = persist_read_int(STORAGE_KEY_ALARM_MINUTE);
+	s_the_time.HourSet = s_the_time.HourWIP;
+	s_the_time.MinuteSet = s_the_time.MinuteWIP;
 
 	switch (launch_reason()) {
 	case APP_LAUNCH_WAKEUP: