Add misc.temp.unit and move misc.temp_limit to misc.temp.limit

Signed-off-by: DL6ER <dl6er@dl6er.de>

src/api/docs/content/specs/config.yaml

@@ -302,8 +302,13 @@ components:
                   type: boolean
                 privacylevel:
                   type: integer
-                temp_limit:
-                  type: number
+                temp:
+                  type: object
+                  properties:
+                    limit:
+                      type: number
+                    unit:
+                      type: string
                 check:
                   type: object
                   properties:
@@ -472,7 +477,9 @@ components:
             delay_startup: 10
             addr2line: true
             privacylevel: 0
-            temp_limit: 60.0
+            temp:
+              limit: 60.0
+              unit: "C"
             check:
               load: true
               shmem: 90

src/api/ftl.c

@@ -230,9 +230,20 @@ static int read_temp_sensor(struct ftl_conn *api,
 
 			// Compute actual temperature
 			double temp = raw_temp < 1000 ? raw_temp : 1e-3*raw_temp;
+			const char *unit = "C";
+			if(config.misc.temp.unit.v.s[0] == 'F')
+			{
+				temp = 1.8*temp + 32; // Convert °Celsius to °Fahrenheit
+				unit = "F";
+			}
+			else if(config.misc.temp.unit.v.s[0] == 'K')
+			{
+				temp += 273.15; // Convert °Celsius to Kelvin
+				unit = "K";
+			}
 			JSON_ADD_NUMBER_TO_OBJECT(item, "value", temp);
-			JSON_ADD_NUMBER_TO_OBJECT(item, "hot_limit", config.misc.temp_limit.v.d);
-			JSON_REF_STR_IN_OBJECT(item, "unit", "C");
+			JSON_ADD_NUMBER_TO_OBJECT(item, "hot_limit", config.misc.temp.limit.v.d);
+			JSON_REF_STR_IN_OBJECT(item, "unit", unit);
 			JSON_ADD_ITEM_TO_ARRAY(object, item);
 		}
 	}

src/config/config.c

@@ -643,10 +643,16 @@ void initConfig(void)
 	config.misc.delay_startup.d.ui = 0;
 
 	// sub-struct misc.temp
-	config.misc.temp_limit.k = "misc.temp_limit";
-	config.misc.temp_limit.h = "Which upper temperature limit should be used by Pi-hole [°C]? Temperatures above this limit will be shown as \"hot\"";
-	config.misc.temp_limit.t = CONF_DOUBLE;
-	config.misc.temp_limit.d.d = 60.0; // °C
+	config.misc.temp.limit.k = "misc.temp.limit";
+	config.misc.temp.limit.h = "Which upper temperature limit should be used by Pi-hole? Temperatures above this limit will be shown as \"hot\". The number specified here is in the unit defined below";
+	config.misc.temp.limit.t = CONF_DOUBLE;
+	config.misc.temp.limit.d.d = 60.0; // °C
+
+	config.misc.temp.unit.k = "misc.temp.unit";
+	config.misc.temp.unit.h = "Which temperature unit should be used for temperatures processed by FTL?";
+	config.misc.temp.unit.a = "[ \"C\", \"F\", \"K\" ]";
+	config.misc.temp.unit.t = CONF_STRING;
+	config.misc.temp.unit.d.s = (char*)"C";
 
 	// sub-struct misc.check
 	config.misc.check.load.k = "misc.check.load";

src/config/config.h

@@ -229,7 +229,10 @@ struct config {
 		struct conf_item delay_startup;
 		struct conf_item addr2line;
 		struct conf_item privacylevel;
-		struct conf_item temp_limit;
+		struct {
+			struct conf_item limit;
+			struct conf_item unit;
+		} temp;
 		struct {
 			struct conf_item load;
 			struct conf_item shmem;

src/dnsmasq_interface.c

@@ -3306,7 +3306,7 @@ int check_struct_sizes(void)
 	int result = 0;
 	// sizeof(struct conf_item) is 72 on x86_64 and 52 on x86_32
 	// number of config elements: CONFIG_ELEMENTS
-	result += check_one_struct("struct config", sizeof(struct config), 7920, 5720);
+	result += check_one_struct("struct config", sizeof(struct config), 7992, 5772);
 	result += check_one_struct("queriesData", sizeof(queriesData), 72, 64);
 	result += check_one_struct("upstreamsData", sizeof(upstreamsData), 640, 628);
 	result += check_one_struct("clientsData", sizeof(clientsData), 672, 652);

src/setupVars.c

@@ -116,12 +116,15 @@ void importsetupVarsConf(void)
 	{
 		double lim;
 		if(sscanf(temp_limit, "%lf", &lim) == 1)
-			config.misc.temp_limit.v.d = lim;
+			config.misc.temp.limit.v.d = lim;
 	}
 
 	// Free memory, harmless to call if read_setupVarsconf() didn't return a result
 	clearSetupVarsArray();
 
+	// Try to obtain password hash from setupVars.conf
+	get_conf_string_from_setupVars("TEMPERATURE_UNIT", &config.misc.temp.unit);
+
 
 
 	// Try to obtain boxed-layout boolean