app/authentication/admin.py

@@ -1,3 +0,0 @@
-from django.contrib import admin
-
-# Register your models here.

app/authentication/models.py

@@ -1,3 +0,0 @@
-from django.db import models
-
-# Create your models here.

app/authentication/tests.py

@@ -1,3 +0,0 @@
-from django.test import TestCase
-
-# Create your tests here.

app/authentication/views.py

@@ -108,7 +108,8 @@ def register_continue(request):
                 instance.save()
             request.session.flush()
 
-            # TODO sync withings health data
+            withings_api_account.update_records()
+
             # TODO redirect user to some other page and ask them to log in
             return redirect('dashboard')
 

app/gotify/admin.py

@@ -1,3 +0,0 @@
-from django.contrib import admin
-
-# Register your models here.

app/gotify/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 4.2.3 on 2023-07-27 14:35
+# Generated by Django 4.2.3 on 2023-07-29 18:28
 
 from django.conf import settings
 from django.db import migrations, models

app/gotify/tests.py

@@ -1,3 +0,0 @@
-from django.test import TestCase
-
-# Create your tests here.

app/gotify/views.py

@@ -1,3 +0,0 @@
-from django.shortcuts import render
-
-# Create your views here.

app/medwings/admin.py

@@ -1,3 +0,0 @@
-from django.contrib import admin
-
-# Register your models here.

app/medwings/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 4.2.3 on 2023-07-27 14:35
+# Generated by Django 4.2.3 on 2023-07-29 18:28
 
 from django.conf import settings
 from django.db import migrations, models
@@ -20,7 +20,7 @@ class Migration(migrations.Migration):
             name='BloodPressureRecord',
             fields=[
                 ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('recorded', models.DateTimeField(validators=[medwings.validators.AbstractRecordValidator.recorded], verbose_name='Time at which measurement was taken')),
+                ('recorded', models.DateTimeField(unique=True, validators=[medwings.validators.AbstractRecordValidator.recorded], verbose_name='Time at which measurement was taken')),
                 ('value_systolic_mmhg', models.PositiveIntegerField(validators=[medwings.validators.BloodPressureRecordValidator.value_systolic_mmhg], verbose_name='Systolic Blood Pressure (mmhg)')),
                 ('value_diastolic_mmhg', models.PositiveIntegerField(validators=[medwings.validators.BloodPressureRecordValidator.value_diastolic_mmhg], verbose_name='Diastolic Blood Pressure (mmhg)')),
                 ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
@@ -30,8 +30,8 @@ class Migration(migrations.Migration):
             name='BodyTempRecord',
             fields=[
                 ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('recorded', models.DateTimeField(validators=[medwings.validators.AbstractRecordValidator.recorded], verbose_name='Time at which measurement was taken')),
+                ('recorded', models.DateTimeField(unique=True, validators=[medwings.validators.AbstractRecordValidator.recorded], verbose_name='Time at which measurement was taken')),
-                ('value_celsius', models.PositiveIntegerField(validators=[medwings.validators.BodyTempRecordValidator.value_celsius], verbose_name='Body Temperature (°C)')),
+                ('value_celsius', models.DecimalField(decimal_places=2, max_digits=5, unique=True, validators=[medwings.validators.BodyTempRecordValidator.value_celsius], verbose_name='Body Temperature (°C)')),
                 ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
             ],
         ),
@@ -39,7 +39,7 @@ class Migration(migrations.Migration):
             name='HeartRateRecord',
             fields=[
                 ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('recorded', models.DateTimeField(validators=[medwings.validators.AbstractRecordValidator.recorded], verbose_name='Time at which measurement was taken')),
+                ('recorded', models.DateTimeField(unique=True, validators=[medwings.validators.AbstractRecordValidator.recorded], verbose_name='Time at which measurement was taken')),
                 ('value_bpm', models.PositiveIntegerField(validators=[medwings.validators.HeartRateRecordValidator.value_bpm], verbose_name='Heart Rate (bpm)')),
                 ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
             ],
@@ -56,7 +56,7 @@ class Migration(migrations.Migration):
             name='Spo2LevelRecord',
             fields=[
                 ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('recorded', models.DateTimeField(validators=[medwings.validators.AbstractRecordValidator.recorded], verbose_name='Time at which measurement was taken')),
+                ('recorded', models.DateTimeField(unique=True, validators=[medwings.validators.AbstractRecordValidator.recorded], verbose_name='Time at which measurement was taken')),
                 ('value_percent', models.PositiveIntegerField(validators=[medwings.validators.Spo2LevelRecordValidator.value_percent], verbose_name='SPO2 (%)')),
                 ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
             ],
@@ -65,7 +65,7 @@ class Migration(migrations.Migration):
             name='RespirationScoreRecord',
             fields=[
                 ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('recorded', models.DateTimeField(validators=[medwings.validators.AbstractRecordValidator.recorded], verbose_name='Time at which measurement was taken')),
+                ('recorded', models.DateTimeField(unique=True, validators=[medwings.validators.AbstractRecordValidator.recorded], verbose_name='Time at which measurement was taken')),
                 ('value_severity', models.PositiveIntegerField(choices=[(0, 'No shortness of breath'), (1, 'A little shortness of breath'), (2, 'Severe shortness of breath')], validators=[medwings.validators.RespirationScoreRecordValidator.value_severity], verbose_name='Shortness Of Breath Severity')),
                 ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
             ],
@@ -74,7 +74,7 @@ class Migration(migrations.Migration):
             name='MewsRecord',
             fields=[
                 ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('recorded', models.DateTimeField(validators=[medwings.validators.AbstractRecordValidator.recorded], verbose_name='Time at which measurement was calculated')),
+                ('recorded', models.DateTimeField(unique=True, validators=[medwings.validators.AbstractRecordValidator.recorded], verbose_name='Time at which measurement was calculated')),
                 ('value_n', models.PositiveIntegerField(validators=[medwings.validators.MewsRecordValidator.value_n], verbose_name='Modified Early Warning Score')),
                 ('blood_pressure_record', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='medwings.bloodpressurerecord')),
                 ('body_temp_record', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='medwings.bodytemprecord')),

app/medwings/models.py

@@ -19,23 +19,29 @@ class Profile(models.Model):
 
 class BloodPressureRecord(models.Model):
     user = models.ForeignKey(User, on_delete=models.CASCADE)
-    recorded = models.DateTimeField(validators=[validators.BloodPressureRecordValidator.recorded], verbose_name="Time at which measurement was taken")
+    recorded = models.DateTimeField(validators=[validators.BloodPressureRecordValidator.recorded], unique=True, verbose_name="Time at which measurement was taken")
     value_systolic_mmhg = models.PositiveIntegerField(validators=[validators.BloodPressureRecordValidator.value_systolic_mmhg], verbose_name="Systolic Blood Pressure (mmhg)")
     value_diastolic_mmhg = models.PositiveIntegerField(validators=[validators.BloodPressureRecordValidator.value_diastolic_mmhg], verbose_name="Diastolic Blood Pressure (mmhg)")
 
 
 class BodyTempRecord(models.Model):
     user = models.ForeignKey(User, on_delete=models.CASCADE)
-    recorded = models.DateTimeField(validators=[validators.BodyTempRecordValidator.recorded], verbose_name="Time at which measurement was taken")
+    recorded = models.DateTimeField(validators=[validators.BodyTempRecordValidator.recorded], unique=True, verbose_name="Time at which measurement was taken")
-    value_celsius = models.PositiveIntegerField(validators=[validators.BodyTempRecordValidator.value_celsius], verbose_name="Body Temperature (\u00B0C)")
+    value_celsius = models.DecimalField(max_digits=5, decimal_places=2, validators=[validators.BodyTempRecordValidator.value_celsius], unique=True, verbose_name="Body Temperature (\u00B0C)")
 
 
 class HeartRateRecord(models.Model):
     user = models.ForeignKey(User, on_delete=models.CASCADE)
-    recorded = models.DateTimeField(validators=[validators.HeartRateRecordValidator.recorded], verbose_name="Time at which measurement was taken")
+    recorded = models.DateTimeField(validators=[validators.HeartRateRecordValidator.recorded], unique=True, verbose_name="Time at which measurement was taken")
     value_bpm = models.PositiveIntegerField(validators=[validators.HeartRateRecordValidator.value_bpm], verbose_name="Heart Rate (bpm)")
 
 
+class Spo2LevelRecord(models.Model):
+    user = models.ForeignKey(User, on_delete=models.CASCADE)
+    recorded = models.DateTimeField(validators=[validators.Spo2LevelRecordValidator.recorded], unique=True, verbose_name="Time at which measurement was taken")
+    value_percent = models.PositiveIntegerField(validators=[validators.Spo2LevelRecordValidator.value_percent], verbose_name="SPO2 (\u0025)")
+
+
 class RespirationScoreRecord(models.Model):
     SEVERITY_NONE = 0
     SEVERITY_LOW = 1
@@ -47,19 +53,13 @@ class RespirationScoreRecord(models.Model):
     ]
 
     user = models.ForeignKey(User, on_delete=models.CASCADE)
-    recorded = models.DateTimeField(validators=[validators.RespirationScoreRecordValidator.recorded], verbose_name="Time at which measurement was taken")
+    recorded = models.DateTimeField(validators=[validators.RespirationScoreRecordValidator.recorded], unique=True, verbose_name="Time at which measurement was taken")
     value_severity = models.PositiveIntegerField(choices=SEVERITY_CHOICES, validators=[validators.RespirationScoreRecordValidator.value_severity], verbose_name="Shortness Of Breath Severity")
 
 
-class Spo2LevelRecord(models.Model):
-    user = models.ForeignKey(User, on_delete=models.CASCADE)
-    recorded = models.DateTimeField(validators=[validators.Spo2LevelRecordValidator.recorded], verbose_name="Time at which measurement was taken")
-    value_percent = models.PositiveIntegerField(validators=[validators.Spo2LevelRecordValidator.value_percent], verbose_name="SPO2 (\u0025)")
-
-
 class MewsRecord(models.Model):
     user = models.ForeignKey(User, on_delete=models.CASCADE)
-    recorded = models.DateTimeField(validators=[validators.MewsRecordValidator.recorded], verbose_name="Time at which measurement was calculated")
+    recorded = models.DateTimeField(validators=[validators.MewsRecordValidator.recorded], unique=True, verbose_name="Time at which measurement was calculated")
     value_n = models.PositiveIntegerField(validators=[validators.MewsRecordValidator.value_n], verbose_name="Modified Early Warning Score")
 
     blood_pressure_record = models.ForeignKey(BloodPressureRecord, on_delete=models.CASCADE)

app/medwings/tests.py

@@ -1,3 +0,0 @@
-from django.test import TestCase
-
-# Create your tests here.

app/requirements.txt

@@ -5,6 +5,7 @@ Django==4.2.3
 idna==3.4
 psycopg==3.1.9
 psycopg-binary==3.1.9
+pytz==2023.3
 requests==2.31.0
 sqlparse==0.4.4
 typing_extensions==4.7.1

app/withings/README.md

@@ -0,0 +1,210 @@
+# Withings API
+
+## Token expiry
+
+When the access token expires, HTTP status `200 OK` is returned, but the response body is as follows:
+
+```json
+{
+    "status": 401,
+    "body": {},
+    "error": "XRequestID: Not provided invalid_token: The access token provided is invalid"
+}
+```
+
+## Fetching health data
+
+Health records can be fetched via GET request as follows:
+
+```http
+https://wbsapi.withings.net/measure?action=getmeas&meastypes=9,10,54,71,11
+```
+
+The type of vitals measurement is mapped as follows:
+
+| Code | Type                     | Unit |
+|------|--------------------------|------|
+| 9    | Diastolic Blood Pressure | mmHg |
+| 10   | Systolic Blood Pressure  | mmHg |
+| 11   | Heart Rate               | bpm  |
+| 54   | SP02                     | %    |
+| 71   | Body Temperature         | °C   |
+
+Note the `unit`-field in the response.
+For body temperature, the `unit`-field has the value `-3`.
+This means that to get the body temperature in °C, you must multiply the `value` by `10^(-3)`.
+
+The time of measurement can be parsed from the `measuregrps`'s `date` field.
+
+A successful response looks like so:
+
+```json
+{
+    "status": 0,
+    "body": {
+        "updatetime": 1690491663,
+        "timezone": "Europe/Berlin",
+        "measuregrps": [
+            {
+                "grpid": 4716596696,
+                "attrib": 0,
+                "date": 1690491576,
+                "created": 1690491663,
+                "modified": 1690491663,
+                "category": 1,
+                "deviceid": "c405eb8e0e053f6601e151c7e43c04e29aad6956",
+                "hash_deviceid": "c405eb8e0e053f6601e151c7e43c04e29aad6956",
+                "measures": [
+                    {
+                        "value": 89,
+                        "type": 9,
+                        "unit": 0,
+                        "algo": 0,
+                        "fm": 3
+                    },
+                    {
+                        "value": 109,
+                        "type": 10,
+                        "unit": 0,
+                        "algo": 0,
+                        "fm": 3
+                    },
+                    {
+                        "value": 88,
+                        "type": 11,
+                        "unit": 0,
+                        "algo": 0,
+                        "fm": 3
+                    }
+                ],
+                "modelid": 44,
+                "model": "BPM Core",
+                "comment": null
+            },
+            {
+                "grpid": 4716596681,
+                "attrib": 0,
+                "date": 1690491236,
+                "created": 1690491662,
+                "modified": 1690491662,
+                "category": 1,
+                "deviceid": "c405eb8e0e053f6601e151c7e43c04e29aad6956",
+                "hash_deviceid": "c405eb8e0e053f6601e151c7e43c04e29aad6956",
+                "measures": [
+                    {
+                        "value": 65,
+                        "type": 9,
+                        "unit": 0,
+                        "algo": 0,
+                        "fm": 3
+                    },
+                    {
+                        "value": 92,
+                        "type": 10,
+                        "unit": 0,
+                        "algo": 0,
+                        "fm": 3
+                    },
+                    {
+                        "value": 88,
+                        "type": 11,
+                        "unit": 0,
+                        "algo": 0,
+                        "fm": 3
+                    }
+                ],
+                "modelid": 44,
+                "model": "BPM Core",
+                "comment": null
+            },
+            {
+                "grpid": 4712963495,
+                "attrib": 0,
+                "date": 1690375238,
+                "created": 1690375243,
+                "modified": 1690375243,
+                "category": 1,
+                "deviceid": "dbf7f61809d5fb350a16a50f6af6e826f0746082",
+                "hash_deviceid": "dbf7f61809d5fb350a16a50f6af6e826f0746082",
+                "measures": [
+                    {
+                        "value": 99,
+                        "type": 54,
+                        "unit": 0,
+                        "algo": 33619971,
+                        "fm": 3,
+                        "apppfmid": 9,
+                        "appliver": 2741,
+                        "algo_params": {
+                            "1": 0,
+                            "2": 15
+                        }
+                    }
+                ],
+                "modelid": null,
+                "model": null,
+                "comment": null,
+                "is_inconclusive": false
+            },
+            {
+                "grpid": 4712927310,
+                "attrib": 1,
+                "date": 1690374434,
+                "created": 1690374456,
+                "modified": 1690374486,
+                "category": 1,
+                "deviceid": "1d453daf947378fac40677e7a085eea73750b061",
+                "hash_deviceid": "1d453daf947378fac40677e7a085eea73750b061",
+                "measures": [
+                    {
+                        "value": 37370,
+                        "type": 71,
+                        "unit": -3,
+                        "algo": 0,
+                        "fm": 0
+                    }
+                ],
+                "modelid": null,
+                "model": null,
+                "comment": null
+            },
+            {
+                "grpid": 4712911433,
+                "attrib": 0,
+                "date": 1690373994,
+                "created": 1690374078,
+                "modified": 1690374078,
+                "category": 1,
+                "deviceid": "c405eb8e0e053f6601e151c7e43c04e29aad6956",
+                "hash_deviceid": "c405eb8e0e053f6601e151c7e43c04e29aad6956",
+                "measures": [
+                    {
+                        "value": 88,
+                        "type": 9,
+                        "unit": 0,
+                        "algo": 0,
+                        "fm": 3
+                    },
+                    {
+                        "value": 124,
+                        "type": 10,
+                        "unit": 0,
+                        "algo": 0,
+                        "fm": 3
+                    },
+                    {
+                        "value": 70,
+                        "type": 11,
+                        "unit": 0,
+                        "algo": 0,
+                        "fm": 3
+                    }
+                ],
+                "modelid": null,
+                "model": null,
+                "comment": null
+            }
+        ]
+    }
+}
+```

app/withings/admin.py

@@ -1,3 +0,0 @@
-from django.contrib import admin
-
-# Register your models here.

app/withings/api.py

@@ -1,11 +1,15 @@
-from datetime import timedelta
+from datetime import datetime, timedelta
 from random import randint
 
 import requests
+import pytz
 from django.conf import settings
 from django.utils import timezone
+from django.contrib.auth.models import User
 from urllib.parse import urlencode
 
+from medwings import models as mm
+
 def fetch_initial_tokens(authorization_code, redirect_uri):
     data = {
         'action': 'requesttoken',
@@ -49,3 +53,64 @@ def save_tokens_to_session(request, response_data):
     now = timezone.now()
     request.session['withings_access_token_expiry'] = (now + timedelta(seconds=response_data['body']['expires_in'])).isoformat()
     request.session['withings_refresh_token_expiry'] = (now + timedelta(days=365)).isoformat()
+
+
+def parse_getmeas_response(response_body: dict, user: User) -> list:
+    body = response_body['body']
+    records = []
+
+    timezone = pytz.timezone(body['timezone'])
+
+    for measure_group in body['measuregrps']:
+        recorded = timezone.localize(datetime.fromtimestamp(measure_group['date']))
+
+        blood_pressure_systolic_value = None
+        blood_pressure_diastolic_value = None
+        body_temperature_value = None
+        heart_rate_value = None
+        spo2_level_value = None
+        for measure in measure_group['measures']:
+            measure_type = measure['type']
+            measure_value = measure['value']
+            measure_unit = measure['unit']
+            
+            measure_value_adjusted = measure_value * (10 ** measure_unit)
+
+            if measure_type == 9:
+                blood_pressure_diastolic_value = measure_value_adjusted
+            elif measure_type == 10:
+                blood_pressure_systolic_value = measure_value_adjusted
+            elif measure_type == 11:
+                heart_rate_value = measure_value_adjusted
+            elif measure_type == 54:
+                spo2_level_value = measure_value_adjusted
+            elif measure_type == 71:
+                body_temperature_value = measure_value_adjusted
+
+        if blood_pressure_systolic_value and blood_pressure_diastolic_value:
+            records.append(mm.BloodPressureRecord(
+                user=user,
+                recorded=recorded,
+                value_systolic_mmhg=blood_pressure_systolic_value,
+                value_diastolic_mmhg=blood_pressure_diastolic_value
+            ))
+        if body_temperature_value:
+            records.append(mm.BodyTempRecord(
+                user=user,
+                recorded=recorded,
+                value_celsius=body_temperature_value
+            ))
+        if heart_rate_value:
+            records.append(mm.HeartRateRecord(
+                user=user,
+                recorded=recorded,
+                value_bpm=heart_rate_value
+            ))
+        if spo2_level_value:
+            records.append(mm.Spo2LevelRecord(
+                user=user,
+                recorded=recorded,
+                value_percent=spo2_level_value
+            ))
+
+    return records

app/withings/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 4.2.3 on 2023-07-27 14:35
+# Generated by Django 4.2.3 on 2023-07-29 18:35
 
 from django.conf import settings
 from django.db import migrations, models
@@ -19,6 +19,7 @@ class Migration(migrations.Migration):
             fields=[
                 ('user', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, primary_key=True, serialize=False, to=settings.AUTH_USER_MODEL)),
                 ('userid', models.PositiveIntegerField(verbose_name='Withings API User ID')),
+                ('last_update', models.DateTimeField(default=None, null=True, verbose_name='Time of last synchronization with Withings API')),
             ],
         ),
         migrations.CreateModel(

app/withings/models.py

@@ -1,13 +1,13 @@
-from datetime import timedelta
+from datetime import datetime, timedelta
-import logging
 
-from django.db import models
+from django.db import models, IntegrityError
 from django.contrib.auth.models import User
 from django.conf import settings
 from django.utils import timezone
-
 import requests
 
+from . import api
+
 
 class AccessToken(models.Model):
     account = models.OneToOneField("ApiAccount", on_delete=models.CASCADE, primary_key=True)
@@ -24,6 +24,7 @@ class RefreshToken(models.Model):
 class ApiAccount(models.Model):
     user = models.OneToOneField(User, on_delete=models.CASCADE, primary_key=True)
     userid = models.PositiveIntegerField(verbose_name="Withings API User ID")
+    last_update = models.DateTimeField(null=True, default=None, verbose_name="Time of last synchronization with Withings API")
 
     def refresh_tokens(self):
         data = {
@@ -49,3 +50,41 @@ class ApiAccount(models.Model):
         self.refreshtoken.expires = now + timedelta(days=365)
         self.accesstoken.save()
         self.refreshtoken.save()
+
+
+    def get_measurements(self, since: datetime | None = None) -> list:
+        if self.accesstoken.expires < timezone.now():
+            self.refresh_tokens()
+
+        params={
+            'action': 'getmeas',
+            'meastypes': '9,10,11,54,71'
+        }
+        if since:
+            params['lastupdate'] = str(int(since.timestamp()))
+
+        response = requests.get(
+            url="https://wbsapi.withings.net/measure",
+            params=params,
+            headers={
+                'Authorization': f"Bearer {self.accesstoken.value}"
+            }
+        )
+        if response is not None:
+            response.raise_for_status()
+        data = response.json()
+        if data['status'] != 0:
+            raise RuntimeError(f"Received status {data['status']} while retrieving measurements: {data['error']}")
+
+        return api.parse_getmeas_response(data, self.user)
+
+    
+    def update_records(self):
+        records = self.get_measurements(self.last_update)
+        for record in records:
+            try:
+                record.save()
+            except IntegrityError:
+                pass
+        self.last_update = timezone.now()
+        self.save()

app/withings/tests.py

@@ -1,3 +0,0 @@
-from django.test import TestCase
-
-# Create your tests here.

app/withings/views.py

@@ -1,3 +0,0 @@
-from django.shortcuts import render
-
-# Create your views here.