Xiaomi: Fix SpO2

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/AbstractSampleToTimeSampleProvider.java

@@ -41,6 +41,7 @@ public abstract class AbstractSampleToTimeSampleProvider<T extends TimeSample, S
         mSession = session;
     }
 
+    @Nullable
     protected abstract T convertSample(final S sample);
 
     public GBDevice getDevice() {
@@ -57,7 +58,10 @@ public abstract class AbstractSampleToTimeSampleProvider<T extends TimeSample, S
         final List<S> upstreamSamples = mSampleProvider.getAllActivitySamples((int) (timestampFrom / 1000L), (int) (timestampTo / 1000L));
         final List<T> ret = new ArrayList<>();
         for (final S sample : upstreamSamples) {
-            ret.add(convertSample(sample));
+            final T converted = convertSample(sample);
+            if (converted != null) {
+                ret.add(converted);
+            }
         }
         return ret;
     }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/xiaomi/XiaomiCoordinator.java

@@ -76,8 +76,7 @@ public abstract class XiaomiCoordinator extends AbstractBLEDeviceCoordinator {
 
     @Override
     public TimeSampleProvider<? extends Spo2Sample> getSpo2SampleProvider(final GBDevice device, final DaoSession session) {
-        // TODO XiaomiSpo2SampleProvider
-        return super.getSpo2SampleProvider(device, session);
+        return new XiaomiSpo2SampleProvider(device, session);
     }
 
     @Override
@@ -156,24 +155,6 @@ public abstract class XiaomiCoordinator extends AbstractBLEDeviceCoordinator {
         return AppManagerActivity.class;
     }
 
-    @Override
-    public File getAppCacheDir() throws IOException {
-        // TODO we don't need this
-        return new File(FileUtils.getExternalFilesDir(), "xiaomi-app-cache");
-    }
-
-    @Override
-    public String getAppCacheSortFilename() {
-        // TODO we don't need this
-        return "xiaomi-app-cache-order.txt";
-    }
-
-    @Override
-    public String getAppFileExtension() {
-        // TODO we don't need this
-        return ".bin";
-    }
-
     @Override
     public boolean supportsAppListFetching() {
         return true;
@@ -217,8 +198,7 @@ public abstract class XiaomiCoordinator extends AbstractBLEDeviceCoordinator {
 
     @Override
     public boolean supportsSpo2() {
-        // TODO it does, but not yet implemented, so let's not crash
-        return false;
+        return true;
     }
 
     @Override

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/xiaomi/XiaomiSpo2SampleProvider.java

@@ -0,0 +1,66 @@
+/*  Copyright (C) 2023 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.xiaomi;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.AbstractSampleToTimeSampleProvider;
+import nodomain.freeyourgadget.gadgetbridge.entities.DaoSession;
+import nodomain.freeyourgadget.gadgetbridge.entities.XiaomiActivitySample;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.Spo2Sample;
+
+public class XiaomiSpo2SampleProvider extends AbstractSampleToTimeSampleProvider<Spo2Sample, XiaomiActivitySample> {
+    public XiaomiSpo2SampleProvider(final GBDevice device, final DaoSession session) {
+        super(new XiaomiSampleProvider(device, session), device, session);
+    }
+
+    @Override
+    protected Spo2Sample convertSample(final XiaomiActivitySample sample) {
+        if (sample.getSpo2() == 0) {
+            return null;
+        }
+
+        return new XiaomiSpo2Sample(
+                sample.getTimestamp() * 1000L,
+                sample.getSpo2()
+        );
+    }
+
+    protected static class XiaomiSpo2Sample implements Spo2Sample {
+        private final long timestamp;
+        private final int spo2;
+
+        public XiaomiSpo2Sample(final long timestamp, final int spo2) {
+            this.timestamp = timestamp;
+            this.spo2 = spo2;
+        }
+
+        @Override
+        public long getTimestamp() {
+            return timestamp;
+        }
+
+        @Override
+        public Type getType() {
+            return Type.UNKNOWN;
+        }
+
+        @Override
+        public int getSpo2() {
+            return spo2;
+        }
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/model/Spo2Sample.java

@@ -20,6 +20,7 @@ public interface Spo2Sample extends TimeSample {
     enum Type {
         MANUAL(0),
         AUTOMATIC(1),
+        UNKNOWN(2),
         ;
 
         private final int num;