simplify the driver interface

app/proc/drivers/hwmon.go

@@ -13,11 +13,11 @@ type HwmonDriver struct {
 	hwmonDriver string
 }
 
-func NewHwmonDriver(expectedDrivers []string) *HwmonDriver {
+func NewHwmonDriver(expectedDrivers []string) (*HwmonDriver, error) {
 	// Locate hwmon path
 	dirs, err := filepath.Glob("/sys/class/hwmon/hwmon*")
 	if err != nil {
-		return nil
+		return nil, err
 	}
 
 	for _, dir := range dirs {
@@ -29,16 +29,35 @@ func NewHwmonDriver(expectedDrivers []string) *HwmonDriver {
 					return &HwmonDriver{
 						hwmonDir:    dir,
 						hwmonDriver: driver,
-					}
+					}, nil
 				}
 			}
 		}
 	}
 
+	return nil, fmt.Errorf("could not find %#v in /sys/class/hwmon", expectedDrivers)
+}
+
+func (r *HwmonDriver) Render(console *strings.Builder) error {
+	t, err := r.Read()
+	if err != nil {
+		return err
+	}
+
+	temps := t.([]TemperatureSensor)
+
+	fmt.Fprint(console, "--- Temperature ---\n")
+	for _, sensor := range temps {
+		tempC := sensor.TempC
+		tempF := (tempC * 9 / 5) + 32
+		// \033[K clears from cursor to end of line (prevents lingering chars)
+		fmt.Fprintf(console, "%-16s | %.2f °C (%.3f °F)\033[K\n", sensor.Name, tempC, tempF)
+	}
+
 	return nil
 }
 
-func (r *HwmonDriver) ReadTemperatureSensors() ([]TemperatureSensor, error) {
+func (r *HwmonDriver) Read() (any, error) {
 	inputs, err := filepath.Glob(filepath.Join(r.hwmonDir, "temp*_input"))
 	if err != nil || len(inputs) == 0 {
 		return nil, fmt.Errorf("no temperature inputs found in %s", r.hwmonDir)