show sender and display correct encryption icon

app/src/main/java/im/conversations/android/database/model/MessageWithContentReactions.java

@@ -149,4 +149,26 @@ public class MessageWithContentReactions implements IndividualName {
     public BareJid individualAddress() {
         return sender;
     }
+
+    public String getSender() {
+        return this.fromResource == null ? null : fromResource.toString();
+    }
+
+    public boolean isGroupChat() {
+        return Arrays.asList(ChatType.MUC, ChatType.MULTICAST).contains(this.chatType);
+    }
+
+    public EncryptionTuple getEncryption() {
+        return new EncryptionTuple(this.encryption, this.trust);
+    }
+
+    public static class EncryptionTuple {
+        public final Encryption encryption;
+        public final Trust trust;
+
+        public EncryptionTuple(Encryption encryption, Trust trust) {
+            this.encryption = encryption;
+            this.trust = trust;
+        }
+    }
 }

app/src/main/java/im/conversations/android/ui/BindingAdapters.java

@@ -4,6 +4,7 @@ import android.content.Context;
 import android.text.format.DateUtils;
 import android.view.KeyEvent;
 import android.view.View;
+import android.widget.ImageView;
 import android.widget.TextView;
 import androidx.annotation.NonNull;
 import androidx.databinding.BindingAdapter;
@@ -13,6 +14,9 @@ import com.google.android.material.textfield.TextInputLayout;
 import com.google.common.base.Supplier;
 import im.conversations.android.R;
 import im.conversations.android.database.model.ChatOverviewItem;
+import im.conversations.android.database.model.Encryption;
+import im.conversations.android.database.model.MessageWithContentReactions;
+import im.conversations.android.database.model.Trust;
 import java.time.Duration;
 import java.time.Instant;
 import java.time.LocalDateTime;
@@ -113,4 +117,31 @@ public class BindingAdapters {
             textView.setVisibility(View.VISIBLE);
         }
     }
+
+    @BindingAdapter("encryption")
+    public static void setEncryption(
+            final ImageView imageView,
+            final MessageWithContentReactions.EncryptionTuple encryptionTuple) {
+        if (encryptionTuple == null) {
+            imageView.setVisibility(View.GONE);
+            return;
+        }
+        final var encryption = encryptionTuple.encryption;
+        final var trust = encryptionTuple.trust;
+        if (encryption == null || encryption == Encryption.CLEARTEXT) {
+            imageView.setVisibility(View.GONE);
+        } else if (encryption == Encryption.OMEMO || encryption == Encryption.PGP) {
+            if (trust == Trust.VERIFIED || trust == Trust.VERIFIED_X509) {
+                imageView.setImageResource(R.drawable.ic_verified_user_24dp);
+            } else {
+                imageView.setImageResource(R.drawable.ic_lock_outline_24dp);
+            }
+            imageView.setVisibility(View.VISIBLE);
+        } else if (encryption == Encryption.FAILURE) {
+            imageView.setImageResource(R.drawable.ic_encryption_errorred_24dp);
+            imageView.setVisibility(View.VISIBLE);
+        } else {
+            throw new IllegalArgumentException(String.format("Unknown encryption %s", encryption));
+        }
+    }
 }

app/src/main/res/drawable/ic_encryption_errorred_24dp.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="?attr/colorControlNormal"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M8.9,6c0,-1.71 1.39,-3.1 3.1,-3.1s3.1,1.39 3.1,3.1v2h-4.27L20,17.17V10c0,-1.1 -0.9,-2 -2,-2h-1V6c0,-2.76 -2.24,-5 -5,-5C9.79,1 7.93,2.45 7.27,4.44L8.9,6.07V6zM2.1,2.1L0.69,3.51L5.3,8.13C4.55,8.42 4,9.15 4,10v10c0,1.1 0.9,2 2,2h12c0.34,0 0.65,-0.09 0.93,-0.24l1.56,1.56l1.41,-1.41L2.1,2.1zM12,17c-1.1,0 -2,-0.9 -2,-2c0,-0.59 0.27,-1.12 0.68,-1.49l2.81,2.81C13.12,16.73 12.59,17 12,17z" />
+</vector>

app/src/main/res/drawable/ic_middle_dot_24dp.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+    <solid android:color="?colorControlNormal" />
+</shape>

app/src/main/res/layout/item_message_received.xml

@@ -66,10 +66,38 @@
             android:layout_marginStart="4sp"
             android:src="@drawable/ic_lock_outline_24dp"
             android:visibility="visible"
+            app:encryption="@{message.getEncryption()}"
+            app:layout_constraintBottom_toBottomOf="@+id/time"
+            app:layout_constraintStart_toEndOf="@+id/sender"
+            app:layout_constraintTop_toTopOf="@+id/time"
+            app:tint="?colorOnSurface" />
+
+        <ImageView
+            android:id="@+id/senderSeparator"
+            android:layout_width="3sp"
+            android:layout_height="3sp"
+            android:layout_marginStart="4sp"
+            android:src="@drawable/ic_middle_dot_24dp"
+            android:textAppearance="?textAppearanceTitleLarge"
+            android:visibility="@{message.isGroupChat() ? View.VISIBLE : View.GONE}"
             app:layout_constraintBottom_toBottomOf="@+id/time"
             app:layout_constraintStart_toEndOf="@+id/time"
             app:layout_constraintTop_toTopOf="@+id/time"
-            app:tint="?colorOnSurface" />
+            app:tint="?colorOnSurface"
+            tools:ignore="SmallSp" />
+
+        <TextView
+            android:id="@+id/sender"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="4sp"
+            android:text="@{message.sender}"
+            android:textAppearance="?textAppearanceLabelSmall"
+            android:textColor="?colorOnSurface"
+            android:visibility="@{message.isGroupChat() ? View.VISIBLE : View.GONE}"
+            app:layout_constraintBaseline_toBaselineOf="@+id/time"
+            app:layout_constraintStart_toEndOf="@+id/senderSeparator"
+            tools:text="Juliet" />
 
 
     </androidx.constraintlayout.widget.ConstraintLayout>