huawei: Initial HuaweiInstallHandler

* able to check if there is watchface bin insize zip
* calc sha256
* show watchface preview
* no real install for now

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huawei/HuaweiInstallHandler.java

@@ -0,0 +1,129 @@
+package nodomain.freeyourgadget.gadgetbridge.devices.huawei;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.net.Uri;
+
+import com.google.gson.Gson;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.activities.InstallActivity;
+import nodomain.freeyourgadget.gadgetbridge.devices.InstallHandler;
+
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.model.GenericItem;
+import nodomain.freeyourgadget.gadgetbridge.util.GB;
+import nodomain.freeyourgadget.gadgetbridge.util.GBZipFile;
+import nodomain.freeyourgadget.gadgetbridge.util.UriHelper;
+import nodomain.freeyourgadget.gadgetbridge.util.ZipFileException;
+
+
+public class HuaweiInstallHandler implements InstallHandler {
+    private static final Logger LOG = LoggerFactory.getLogger(HuaweiInstallHandler.class);
+
+    private final Context context;
+    Bitmap previewbMap;
+    byte[] watchfaceBin;
+    byte[] watchfaceSHA256;
+    public HuaweiInstallHandler(Uri uri, Context context) {
+        this.context = context;
+
+        UriHelper uriHelper;
+
+
+
+        try {
+            uriHelper = UriHelper.get(uri, this.context);
+
+            GBZipFile watchfacePackage = new GBZipFile(uriHelper.openInputStream());
+            String watchfaceDescription = new String(watchfacePackage.getFileFromZip("description.xml"));
+            watchfaceBin = watchfacePackage.getFileFromZip("com.huawei.watchface");
+            final byte[] preview = watchfacePackage.getFileFromZip("preview/cover.jpg");
+            previewbMap = BitmapFactory.decodeByteArray(preview, 0, preview.length);
+
+        } catch (ZipFileException e) {
+            LOG.error("Unable to read watchface file.", e);
+            return;
+        } catch (FileNotFoundException e) {
+            LOG.error("The watchface file was not found.", e);
+            return;
+        } catch (IOException e) {
+            LOG.error("General IO error occurred.", e);
+            return;
+        } catch (Exception e) {
+            LOG.error("Unknown error occurred.", e);
+            return;
+        }
+
+
+        try {
+            MessageDigest m = MessageDigest.getInstance("SHA256");
+            m.update(watchfaceBin, 0, watchfaceBin.length);
+            watchfaceSHA256 =  m.digest();
+        } catch (NoSuchAlgorithmException e) {
+            LOG.error("Digest alghoritm not found.", e);
+            return;
+        }
+
+        LOG.info("watchface loaded, SHA256: "+ GB.hexdump(watchfaceSHA256));
+    }
+
+    @Override
+    public void validateInstallation(InstallActivity installActivity, GBDevice device) {
+        installActivity.setInstallEnabled(true);
+
+        GenericItem installItem = new GenericItem();
+
+
+        if (previewbMap != null) {
+            installItem.setPreview(previewbMap);
+        }
+
+        if (device.isBusy()) {
+            LOG.error("Firmware cannot be installed (device busy)");
+            installActivity.setInfoText("Firmware cannot be installed (device busy)");
+            installActivity.setInfoText(device.getBusyTask());
+            installActivity.setInstallEnabled(false);
+            return;
+        }
+
+        if (device.getType() != DeviceType.HUAWEIBAND7 || !device.isConnected()) { //FIXME: Add all tested huawei devices?
+            LOG.error("Firmware cannot be installed (not connected or wrong device)");
+            installActivity.setInfoText("Firmware cannot be installed (not connected or wrong device)");
+            installActivity.setInstallEnabled(false);
+            return;
+        }
+
+        if (!isValid()) {
+            LOG.error("Firmware cannot be installed (not valid)");
+            installActivity.setInfoText("Firmware cannot be installed (not valid)");
+            installActivity.setInstallEnabled(false);
+        }
+
+        installItem.setName("Huawei watchface preview");
+        //installItem.setDetails(getVersion());
+
+        installActivity.setInfoText(context.getString(R.string.firmware_install_warning, "(unknown)"));
+        installActivity.setInstallItem(installItem);
+        LOG.debug("Initialized HuaweiInstallHandler");
+    }
+
+    @Override
+    public boolean isValid() {
+        return true; //FIXME implement real check
+    }
+
+    @Override
+    public void onStartInstall(GBDevice device) {
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huawei/HuaweiLECoordinator.java

@@ -37,6 +37,7 @@ import nodomain.freeyourgadget.gadgetbridge.GBException;
 import nodomain.freeyourgadget.gadgetbridge.devices.AbstractBLEDeviceCoordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.InstallHandler;
 import nodomain.freeyourgadget.gadgetbridge.devices.SampleProvider;
+import nodomain.freeyourgadget.gadgetbridge.devices.huawei.HuaweiInstallHandler;
 import nodomain.freeyourgadget.gadgetbridge.entities.AbstractActivitySample;
 import nodomain.freeyourgadget.gadgetbridge.entities.BaseActivitySummaryDao;
 import nodomain.freeyourgadget.gadgetbridge.entities.DaoSession;
@@ -210,7 +211,9 @@ public abstract class HuaweiLECoordinator extends AbstractBLEDeviceCoordinator i
 
     @Override
     public InstallHandler findInstallHandler(Uri uri, Context context) {
-        return null;
+        HuaweiInstallHandler handler = new HuaweiInstallHandler(uri, context);
+        return handler.isValid() ? handler : null;
+
     }
 
     @Override