416 lines
19 KiB
Java
416 lines
19 KiB
Java
package nodomain.freeyourgadget.gadgetbridge.service.devices.miband.operations;
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import android.bluetooth.BluetoothGatt;
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import android.bluetooth.BluetoothGattCharacteristic;
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import android.widget.Toast;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.IOException;
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import java.text.DateFormat;
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import java.util.Calendar;
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import java.util.GregorianCalendar;
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import java.util.UUID;
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import java.util.concurrent.TimeUnit;
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import nodomain.freeyourgadget.gadgetbridge.GBApplication;
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import nodomain.freeyourgadget.gadgetbridge.R;
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import nodomain.freeyourgadget.gadgetbridge.database.DBHandler;
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import nodomain.freeyourgadget.gadgetbridge.database.DBHelper;
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import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst;
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import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandDateConverter;
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import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandSampleProvider;
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import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandService;
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import nodomain.freeyourgadget.gadgetbridge.entities.MiBandActivitySample;
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import nodomain.freeyourgadget.gadgetbridge.service.btle.TransactionBuilder;
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import nodomain.freeyourgadget.gadgetbridge.service.btle.actions.SetDeviceBusyAction;
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import nodomain.freeyourgadget.gadgetbridge.service.devices.miband.MiBandSupport;
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import nodomain.freeyourgadget.gadgetbridge.util.DateTimeUtils;
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import nodomain.freeyourgadget.gadgetbridge.util.GB;
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import nodomain.freeyourgadget.gadgetbridge.util.Prefs;
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//import java.util.concurrent.Executors;
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//import java.util.concurrent.ScheduledExecutorService;
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//import java.util.concurrent.ScheduledFuture;
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/**
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* An operation that fetches activity data. For every fetch, a new operation must
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* be created, i.e. an operation may not be reused for multiple fetches.
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*/
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public class FetchActivityOperation extends AbstractMiBandOperation {
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private static final Logger LOG = LoggerFactory.getLogger(FetchActivityOperation.class);
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private static final byte[] fetch = new byte[]{MiBandService.COMMAND_FETCH_DATA};
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//sometimes the Mi Band stops sending data, we confirm the part of the data transfer after some time
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//private ScheduledExecutorService scheduleTaskExecutor;
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//private ScheduledFuture scheduledTask;
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private final int activityMetadataLength = 11;
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//temporary buffer, size is a multiple of 60 because we want to store complete minutes (1 minute = 3 or 4 bytes)
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private final int activityDataHolderSize;
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private final boolean hasExtendedActivityData;
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private static class ActivityStruct {
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private final byte[] activityDataHolder;
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private final int activityDataHolderSize;
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//index of the buffer above
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private int activityDataHolderProgress = 0;
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//number of bytes we will get in a single data transfer, used as counter
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private int activityDataRemainingBytes = 0;
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//same as above, but remains untouched for the ack message
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private int activityDataUntilNextHeader = 0;
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//timestamp of the single data transfer, incremented to store each minute's data
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private GregorianCalendar activityDataTimestampProgress = null;
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//same as above, but remains untouched for the ack message
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private GregorianCalendar activityDataTimestampToAck = null;
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ActivityStruct(int activityDataHolderSize) {
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this.activityDataHolderSize = activityDataHolderSize;
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activityDataHolder = new byte[activityDataHolderSize];
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}
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public boolean hasRoomFor(byte[] value) {
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return activityDataRemainingBytes >= value.length;
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}
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public boolean isValidData(byte[] value) {
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//I don't like this clause, but until we figure out why we get different data sometimes this should work
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return value.length == 20 || value.length == activityDataRemainingBytes;
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}
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public boolean isBufferFull() {
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return activityDataHolderSize == activityDataHolderProgress;
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}
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public void buffer(byte[] value) {
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System.arraycopy(value, 0, activityDataHolder, activityDataHolderProgress, value.length);
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activityDataHolderProgress += value.length;
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activityDataRemainingBytes -= value.length;
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validate();
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}
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private void validate() {
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GB.assertThat(activityDataRemainingBytes >= 0, "Illegal state, remaining bytes is negative");
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}
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public boolean isFirstChunk() {
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return activityDataTimestampProgress == null;
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}
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public void startNewBlock(GregorianCalendar timestamp, int dataUntilNextHeader) {
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GB.assertThat(timestamp != null, "Timestamp must not be null");
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if (isFirstChunk()) {
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activityDataTimestampProgress = timestamp;
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} else {
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if (timestamp.getTimeInMillis() >= activityDataTimestampProgress.getTimeInMillis()) {
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activityDataTimestampProgress = timestamp;
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} else {
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// something is fishy here... better not trust the given timestamp and simply
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// (re)use the current one
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// we do accept the timestamp to ack though, so that the bogus data is properly cleared on the band
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LOG.warn("Got bogus timestamp: " + timestamp.getTime() + " that is smaller than the previous timestamp: " + activityDataTimestampProgress.getTime());
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}
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}
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activityDataTimestampToAck = (GregorianCalendar) timestamp.clone();
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activityDataRemainingBytes = activityDataUntilNextHeader = dataUntilNextHeader;
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validate();
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}
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public boolean isBlockFinished() {
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return activityDataRemainingBytes == 0;
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}
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public void bufferFlushed(int minutes) {
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activityDataTimestampProgress.add(Calendar.MINUTE, minutes);
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activityDataHolderProgress = 0;
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}
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}
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private ActivityStruct activityStruct;
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public FetchActivityOperation(MiBandSupport support) {
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super(support);
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hasExtendedActivityData = support.getDeviceInfo().supportsHeartrate();
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activityDataHolderSize = getBytesPerMinuteOfActivityData() * 60 * 4; // 4h
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activityStruct = new ActivityStruct(activityDataHolderSize);
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}
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@Override
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protected void doPerform() throws IOException {
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// scheduleTaskExecutor = Executors.newScheduledThreadPool(1);
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TransactionBuilder builder = performInitialized("fetch activity data");
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getSupport().setLowLatency(builder);
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builder.add(new SetDeviceBusyAction(getDevice(), getContext().getString(R.string.busy_task_fetch_activity_data), getContext()));
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builder.write(getCharacteristic(MiBandService.UUID_CHARACTERISTIC_CONTROL_POINT), fetch);
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builder.queue(getQueue());
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}
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@Override
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public boolean onCharacteristicChanged(BluetoothGatt gatt,
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BluetoothGattCharacteristic characteristic) {
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UUID characteristicUUID = characteristic.getUuid();
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if (MiBandService.UUID_CHARACTERISTIC_ACTIVITY_DATA.equals(characteristicUUID)) {
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handleActivityNotif(characteristic.getValue());
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return true;
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} else {
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return super.onCharacteristicChanged(gatt, characteristic);
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}
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}
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private void handleActivityFetchFinish() throws IOException {
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LOG.info("Fetching activity data has finished.");
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activityStruct = null;
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operationFinished();
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unsetBusy();
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}
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/**
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* Method to handle the incoming activity data.
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* There are two kind of messages we currently know:
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* - the first one is 11 bytes long and contains metadata (how many bytes to expect, when the data starts, etc.)
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* - the second one is 20 bytes long and contains the actual activity data
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* <p/>
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* The first message type is parsed by this method, for every other length of the value param, bufferActivityData is called.
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*
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* @param value
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* @see #bufferActivityData(byte[])
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*/
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private void handleActivityNotif(byte[] value) {
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if (!isOperationRunning()) {
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LOG.error("ignoring activity data notification because operation is not running. Data length: " + value.length);
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getSupport().logMessageContent(value);
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return;
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}
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if (value.length == activityMetadataLength) {
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handleActivityMetadata(value);
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} else {
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bufferActivityData(value);
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}
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LOG.debug("activity data: length: " + value.length + ", remaining bytes: " + activityStruct.activityDataRemainingBytes);
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GB.updateTransferNotification(getContext().getString(R.string.busy_task_fetch_activity_data), true, (int) (((float) (activityStruct.activityDataUntilNextHeader - activityStruct.activityDataRemainingBytes)) / activityStruct.activityDataUntilNextHeader * 100), getContext());
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if (activityStruct.isBlockFinished()) {
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sendAckDataTransfer(activityStruct.activityDataTimestampToAck, activityStruct.activityDataUntilNextHeader);
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GB.updateTransferNotification("", false, 100, getContext());
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}
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}
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private void handleActivityMetadata(byte[] value) {
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if (value.length != activityMetadataLength) {
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return;
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}
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// byte 0 is the data type: 1 means that each minute is represented by a triplet of bytes
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int dataType = value[0];
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// byte 1 to 6 represent a timestamp
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GregorianCalendar timestamp = MiBandDateConverter.rawBytesToCalendar(value, 1);
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// counter of all data held by the band
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int totalDataToRead = (value[7] & 0xff) | ((value[8] & 0xff) << 8);
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totalDataToRead *= (dataType == MiBandService.MODE_REGULAR_DATA_LEN_MINUTE) ? getBytesPerMinuteOfActivityData() : 1;
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// counter of this data block
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int dataUntilNextHeader = (value[9] & 0xff) | ((value[10] & 0xff) << 8);
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dataUntilNextHeader *= (dataType == MiBandService.MODE_REGULAR_DATA_LEN_MINUTE) ? getBytesPerMinuteOfActivityData() : 1;
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// there is a total of totalDataToRead that will come in chunks (3 or 4 bytes per minute if dataType == 1 (MiBandService.MODE_REGULAR_DATA_LEN_MINUTE)),
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// these chunks are usually 20 bytes long and grouped in blocks
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// after dataUntilNextHeader bytes we will get a new packet of 11 bytes that should be parsed
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// as we just did
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if (activityStruct.isFirstChunk() && dataUntilNextHeader != 0) {
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GB.toast(getContext().getString(R.string.user_feedback_miband_activity_data_transfer,
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DateTimeUtils.formatDurationHoursMinutes((totalDataToRead / getBytesPerMinuteOfActivityData()), TimeUnit.MINUTES),
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DateFormat.getDateTimeInstance().format(timestamp.getTime())), Toast.LENGTH_LONG, GB.INFO);
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}
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LOG.info("total data to read: " + totalDataToRead + " len: " + (totalDataToRead / getBytesPerMinuteOfActivityData()) + " minute(s)");
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LOG.info("data to read until next header: " + dataUntilNextHeader + " len: " + (dataUntilNextHeader / getBytesPerMinuteOfActivityData()) + " minute(s)");
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LOG.info("TIMESTAMP: " + DateFormat.getDateTimeInstance().format(timestamp.getTime()) + " magic byte: " + dataUntilNextHeader);
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activityStruct.startNewBlock(timestamp, dataUntilNextHeader);
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}
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private int getBytesPerMinuteOfActivityData() {
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return hasExtendedActivityData ? 4 : 3;
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}
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/**
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* Method to store temporarily the activity data values got from the Mi Band.
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* <p/>
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* Since we expect chunks of 20 bytes each, we do not store the received bytes it the length is different.
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*
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* @param value
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*/
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private void bufferActivityData(byte[] value) {
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/*
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if (scheduledTask != null) {
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scheduledTask.cancel(true);
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}
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*/
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if (activityStruct.hasRoomFor(value)) {
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if (activityStruct.isValidData(value)) {
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activityStruct.buffer(value);
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/* scheduledTask = scheduleTaskExecutor.schedule(new Runnable() {
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@Override
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public void run() {
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GB.toast(getContext(), "chiederei " + activityStruct.activityDataTimestampToAck + " "+ activityStruct.activityDataUntilNextHeader, Toast.LENGTH_LONG, GB.ERROR);
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//sendAckDataTransfer(activityStruct.activityDataTimestampToAck, activityStruct.activityDataUntilNextHeader);
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LOG.debug("runnable called");
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}
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}, 10l, TimeUnit.SECONDS);
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*/
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if (activityStruct.isBufferFull()) {
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flushActivityDataHolder();
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}
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} else {
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// the length of the chunk is not what we expect. We need to make sense of this data
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LOG.warn("GOT UNEXPECTED ACTIVITY DATA WITH LENGTH: " + value.length + ", EXPECTED LENGTH: " + activityStruct.activityDataRemainingBytes);
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getSupport().logMessageContent(value);
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}
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} else {
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GB.toast(getContext(), "error buffering activity data: remaining bytes: " + activityStruct.activityDataRemainingBytes + ", received: " + value.length, Toast.LENGTH_LONG, GB.ERROR);
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try {
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TransactionBuilder builder = performInitialized("send stop sync data");
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builder.write(getCharacteristic(MiBandService.UUID_CHARACTERISTIC_CONTROL_POINT), new byte[]{MiBandService.COMMAND_STOP_SYNC_DATA});
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builder.queue(getQueue());
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GB.updateTransferNotification("Data transfer failed", false, 0, getContext());
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handleActivityFetchFinish();
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} catch (IOException e) {
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LOG.error("error stopping activity sync", e);
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}
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}
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}
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/**
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* empty the local buffer for activity data, arrange the values received in groups of three and
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* store them in the DB
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*/
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private void flushActivityDataHolder() {
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if (activityStruct == null) {
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LOG.debug("nothing to flush, struct is already null");
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return;
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}
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int bpm = getBytesPerMinuteOfActivityData();
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LOG.debug("flushing activity data samples: " + activityStruct.activityDataHolderProgress / bpm);
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byte category, intensity, steps, heartrate = 0;
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try (DBHandler dbHandler = GBApplication.acquireDB()){
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MiBandSampleProvider provider = new MiBandSampleProvider(getDevice(), dbHandler.getDaoSession());
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Long userId = DBHelper.getUser(dbHandler.getDaoSession()).getId();
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Long deviceId = DBHelper.getDevice(getDevice(), dbHandler.getDaoSession()).getId();
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int minutes = 0;
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try {
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int timestampInSeconds = (int) (activityStruct.activityDataTimestampProgress.getTimeInMillis() / 1000);
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if ((activityStruct.activityDataHolderProgress % bpm) != 0) {
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throw new IllegalStateException("Unexpected data, progress should be multiple of " + bpm + ": " + activityStruct.activityDataHolderProgress);
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}
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int numSamples = activityStruct.activityDataHolderProgress / bpm;
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MiBandActivitySample[] samples = new MiBandActivitySample[numSamples];
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for (int i = 0; i < activityStruct.activityDataHolderProgress; i += bpm) {
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category = activityStruct.activityDataHolder[i];
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intensity = activityStruct.activityDataHolder[i + 1];
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steps = activityStruct.activityDataHolder[i + 2];
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if (hasExtendedActivityData) {
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heartrate = activityStruct.activityDataHolder[i + 3];
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LOG.debug("heartrate received: " + (heartrate & 0xff));
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}
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samples[minutes] = new MiBandActivitySample(
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timestampInSeconds,
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deviceId,
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userId,
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intensity & 0xff,
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steps & 0xff,
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category & 0xff,
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heartrate & 0xff);
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samples[minutes].setProvider(provider);
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if (LOG.isDebugEnabled()) {
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LOG.debug("sample: " + samples[minutes]);
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}
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// next minute
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minutes++;
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timestampInSeconds += 60;
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}
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provider.addGBActivitySamples(samples);
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} finally {
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activityStruct.bufferFlushed(minutes);
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}
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} catch (Exception ex) {
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GB.toast(getContext(), ex.getMessage(), Toast.LENGTH_LONG, GB.ERROR, ex);
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}
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}
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/**
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* Acknowledge the transfer of activity data to the Mi Band.
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* <p/>
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* After receiving data from the band, it has to be acknowledged. This way the Mi Band will delete
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* the data it has on record.
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*
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* @param time
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* @param bytesTransferred
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*/
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private void sendAckDataTransfer(Calendar time, int bytesTransferred) {
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byte[] ackTime = MiBandDateConverter.calendarToRawBytes(time);
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Prefs prefs = GBApplication.getPrefs();
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byte[] ackChecksum = new byte[]{
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(byte) (bytesTransferred & 0xff),
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(byte) (0xff & (bytesTransferred >> 8))
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};
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if (prefs.getBoolean(MiBandConst.PREF_MIBAND_DONT_ACK_TRANSFER, false)) {
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ackChecksum = new byte[]{
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(byte) (~bytesTransferred & 0xff),
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(byte) (0xff & (~bytesTransferred >> 8))
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};
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}
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byte[] ack = new byte[]{
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MiBandService.COMMAND_CONFIRM_ACTIVITY_DATA_TRANSFER_COMPLETE,
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ackTime[0],
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ackTime[1],
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ackTime[2],
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ackTime[3],
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ackTime[4],
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ackTime[5],
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ackChecksum[0],
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ackChecksum[1]
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};
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try {
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TransactionBuilder builder = performInitialized("send acknowledge");
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builder.write(getCharacteristic(MiBandService.UUID_CHARACTERISTIC_CONTROL_POINT), ack);
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builder.queue(getQueue());
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// flush to the DB after queueing the ACK
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flushActivityDataHolder();
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//The last data chunk sent by the miband has always length 0.
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//When we ack this chunk, the transfer is done.
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if (getDevice().isBusy() && bytesTransferred == 0) {
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//if we are not clearing miband's data, we have to stop the sync
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if (prefs.getBoolean(MiBandConst.PREF_MIBAND_DONT_ACK_TRANSFER, false)) {
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builder = performInitialized("send acknowledge");
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builder.write(getCharacteristic(MiBandService.UUID_CHARACTERISTIC_CONTROL_POINT), new byte[]{MiBandService.COMMAND_STOP_SYNC_DATA});
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getSupport().setHighLatency(builder);
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builder.queue(getQueue());
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}
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handleActivityFetchFinish();
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}
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} catch (IOException ex) {
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LOG.error("Unable to send ack to MI", ex);
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}
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}
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}
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