From 5614d3b156ddd652eebe6ca1f5e2de5e9d8a7f9e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Diego=20Elio=20Petten=C3=B2?= <flameeyes@flameeyes.com>
Date: Sun, 7 Jul 2019 22:29:13 +0100
Subject: Get and set the patient name on supported meters.

This includes the command line extensions to include the get/set patient
name, as well as the driver support for all FreeStyle devices with the
shared HID protocol, although not all will support this properly.
---
 glucometerutils/drivers/fslibre.py   |  3 ++-
 glucometerutils/glucometer.py        | 22 ++++++++++++++++++++++
 glucometerutils/support/freestyle.py |  9 +++++++++
 3 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/glucometerutils/drivers/fslibre.py b/glucometerutils/drivers/fslibre.py
index 87a6556..2823a2b 100644
--- a/glucometerutils/drivers/fslibre.py
+++ b/glucometerutils/drivers/fslibre.py
@@ -6,7 +6,8 @@
 Supported features:
     - get readings (sensor, flash and blood glucose), including comments;
     - get and set date and time;
-    - get serial number and software version.
+    - get serial number and software version;
+    - get and set patient name.
 
 Expected device path: /dev/hidraw9 or similar HID device. Optional when using
 HIDAPI.
diff --git a/glucometerutils/glucometer.py b/glucometerutils/glucometer.py
index 8cf2555..8f222bc 100755
--- a/glucometerutils/glucometer.py
+++ b/glucometerutils/glucometer.py
@@ -58,6 +58,12 @@ def main():
         '--set', action='store', nargs='?', const='now', default=None,
         help='Set the date rather than just reading it from the device.')
 
+    parser_patient = subparsers.add_parser(
+        'patient', help='Reads or sets the patient information.')
+    parser_patient.add_argument(
+        '--set_name', action='store', required=False,
+        help='Set the patient name, if the meter supports it.')
+
     args = parser.parse_args()
 
     logging.basicConfig(level=args.vlog)
@@ -124,6 +130,22 @@ def main():
                 print(device.set_datetime(new_date))
             else:
                 print(device.get_datetime())
+        elif args.action == 'patient':
+            if args.set_name != None:
+                try:
+                    device.set_patient_name(args.set_name)
+                except NotImplementedError:
+                    print(
+                        'The glucometer does not support setting patient name.')
+            try:
+                patient_name = device.get_patient_name()
+                if patient_name is None:
+                    patient_name = '[N/A]'
+                print('Patient Name: {patient_name}'.format(
+                    patient_name=patient_name))
+            except NotImplementedError:
+                print(
+                    'The glucometer does not support retrieving patient name.')
         elif args.action == 'zero':
             confirm = input('Delete the device data log? (y/N) ')
             if confirm.lower() in ['y', 'ye', 'yes']:
diff --git a/glucometerutils/support/freestyle.py b/glucometerutils/support/freestyle.py
index 4684194..13674df 100644
--- a/glucometerutils/support/freestyle.py
+++ b/glucometerutils/support/freestyle.py
@@ -193,6 +193,15 @@ class FreeStyleHidDevice(hiddevice.HidDevice):
             return None
         return patient_name
 
+    def set_patient_name(self, name):
+        # type: (Text) -> None
+        try:
+            name = name.encode('ascii')
+        except UnicodeDecodeError:
+            raise ValueError('Only ASCII-safe names are tested working')
+
+        result = self._send_text_command(b'$ptname,' + name)
+
     def get_datetime(self):
         # type: () -> datetime.datetime
         """Gets the date and time as reported by the device.
-- 
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