colorhug: Add GUIDs for each device

This is required to write fwupd-compatible update descriptions.

lib/colorhug/ch-common.h

@@ -1293,6 +1293,11 @@ G_BEGIN_DECLS
 #define	CH_FIRMWARE_ID_TOKEN_ALS		"84f40464"	/* since 1.2.9 */
 #define	CH_FIRMWARE_ID_TOKEN_PLUS		"6d6f05a9"
 
+#define CH_DEVICE_GUID_COLORHUG			"40338ceb-b966-4eae-adae-9c32edfcc484"	/* since 1.2.9 */
+#define CH_DEVICE_GUID_COLORHUG2		"2082b5e0-7a64-478a-b1b2-e3404fab6dad"	/* since 1.2.9 */
+#define CH_DEVICE_GUID_COLORHUG_ALS		"84f40464-9272-4ef7-9399-cd95f12da696"	/* since 1.2.9 */
+#define CH_DEVICE_GUID_COLORHUG_PLUS		"6d6f05a9-3ecb-43a2-bcbb-3844f1825366"	/* since 1.2.9 */
+
 /* input and output buffer offsets */
 #define	CH_BUFFER_INPUT_CMD			0x00
 #define	CH_BUFFER_INPUT_DATA			0x01

lib/colorhug/ch-device.c

@@ -661,3 +661,33 @@ ch_device_get_runcode_address (GUsbDevice *device)
 	}
 	return 0;
 }
+
+/**
+ * ch_device_get_guid:
+ * @device: A #GUsbDevice
+ *
+ * Returns the GUID for the connected ColorHug device.
+ *
+ * Return value: the GUID address, or %NULL for error
+ *
+ * Since: 1.2.9
+ **/
+const gchar *
+ch_device_get_guid (GUsbDevice *device)
+{
+	ChDeviceMode mode = ch_device_get_mode (device);
+	if (mode == CH_DEVICE_MODE_LEGACY ||
+	    mode == CH_DEVICE_MODE_FIRMWARE ||
+	    mode == CH_DEVICE_MODE_BOOTLOADER)
+		return CH_DEVICE_GUID_COLORHUG;
+	if (mode == CH_DEVICE_MODE_FIRMWARE2 ||
+	    mode == CH_DEVICE_MODE_BOOTLOADER2)
+		return CH_DEVICE_GUID_COLORHUG2;
+	if (mode == CH_DEVICE_MODE_FIRMWARE_PLUS ||
+	    mode == CH_DEVICE_MODE_BOOTLOADER_PLUS)
+		return CH_DEVICE_GUID_COLORHUG_PLUS;
+	if (mode == CH_DEVICE_MODE_FIRMWARE_ALS ||
+	    mode == CH_DEVICE_MODE_BOOTLOADER_ALS)
+		return CH_DEVICE_GUID_COLORHUG_ALS;
+	return NULL;
+}

lib/colorhug/ch-device.h

@@ -69,6 +69,7 @@ gboolean	 ch_device_check_firmware	(GUsbDevice	*device,
 						 GError		**error)
 						 G_GNUC_WARN_UNUSED_RESULT;
 guint16		 ch_device_get_runcode_address	(GUsbDevice	*device);
+const gchar	*ch_device_get_guid		(GUsbDevice	*device);
 
 G_END_DECLS