From 3d70314e8c60baeaf4e6be3dec0ed9eb15ee663c Mon Sep 17 00:00:00 2001
From: Andreas Shimokawa <shimokawa@fsfe.org>
Date: Sun, 19 Aug 2018 00:35:50 +0200
Subject: [PATCH] Mi Band 3: Fix messages not being displayed (send app source
 with notifications and use chunked characteristics where available)

This also sends the app name for Bip and Cor, which is actually displayed when there is no icon (unknown app for the device)

Fixes #1203
---
 .../huami/amazfitbip/AmazfitBipSupport.java   | 56 +++++++++++++++++--
 1 file changed, 51 insertions(+), 5 deletions(-)

diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitbip/AmazfitBipSupport.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitbip/AmazfitBipSupport.java
index ca911f465..dda8d2cfb 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitbip/AmazfitBipSupport.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitbip/AmazfitBipSupport.java
@@ -19,6 +19,8 @@ package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitbip;
 import android.bluetooth.BluetoothGatt;
 import android.bluetooth.BluetoothGattCharacteristic;
 import android.content.Context;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
 import android.net.Uri;
 
 import org.slf4j.Logger;
@@ -92,11 +94,8 @@ public class AmazfitBipSupport extends HuamiSupport {
 
         try {
             TransactionBuilder builder = performInitialized("new notification");
-            AlertNotificationProfile<?> profile = new AlertNotificationProfile(this);
-            profile.setMaxLength(230);
 
             byte customIconId = HuamiIcon.mapToIconId(notificationSpec.type);
-
             AlertCategory alertCategory = AlertCategory.CustomHuami;
 
             // The SMS icon for AlertCategory.SMS is unique and not available as iconId
@@ -108,8 +107,55 @@ public class AmazfitBipSupport extends HuamiSupport {
                 alertCategory = AlertCategory.Email;
             }
 
-            NewAlert alert = new NewAlert(alertCategory, 1, message, customIconId);
-            profile.newAlert(builder, alert);
+            int maxLength = 230;
+            if (characteristicChunked != null) {
+                int prefixlength = 2;
+                int suffixlength = 0;
+
+                byte[] appSuffix = null;
+
+                if (alertCategory == AlertCategory.CustomHuami) {
+                    String appName;
+                    prefixlength = 3;
+                    final PackageManager pm = getContext().getPackageManager();
+                    ApplicationInfo ai = null;
+                    try {
+                        ai = pm.getApplicationInfo(notificationSpec.sourceAppId, 0);
+                    } catch (PackageManager.NameNotFoundException ignored) {
+                    }
+
+                    if (ai != null) {
+                        appName = "\0" + pm.getApplicationLabel(ai) + "\0";
+                    } else {
+                        appName = "\0" + "unknown app" + "\0";
+                    }
+                    appSuffix = appName.getBytes();
+                    suffixlength = appSuffix.length;
+                }
+
+                byte[] rawmessage = message.getBytes();
+                int length = Math.min(rawmessage.length, maxLength - prefixlength);
+
+                byte[] command = new byte[length + prefixlength + suffixlength];
+
+                command[0] = (byte) alertCategory.getId();
+                command[1] = 1;
+                if (alertCategory == AlertCategory.CustomHuami) {
+                    command[2] = customIconId;
+                }
+
+                System.arraycopy(rawmessage, 0, command, prefixlength, length);
+                if (appSuffix != null) {
+                    System.arraycopy(appSuffix, 0, command, prefixlength + length, appSuffix.length);
+                }
+
+                writeToChunked(builder, 0, command);
+            } else {
+                AlertNotificationProfile<?> profile = new AlertNotificationProfile(this);
+                NewAlert alert = new NewAlert(alertCategory, 1, message, customIconId);
+                profile.setMaxLength(maxLength);
+                profile.newAlert(builder, alert);
+            }
             builder.queue(getQueue());
         } catch (IOException ex) {
             LOG.error("Unable to send notification to Amazfit Bip", ex);