allow to pick call and call back by clicking call messages

src/main/java/org/thoughtcrime/securesms/ConversationItem.java

@@ -70,11 +70,14 @@ import org.thoughtcrime.securesms.util.MediaUtil;
 import org.thoughtcrime.securesms.util.Util;
 import org.thoughtcrime.securesms.util.ViewUtil;
 import org.thoughtcrime.securesms.util.views.Stub;
+import org.thoughtcrime.securesms.videochat.VideochatUtil;
 
 import java.util.List;
 import java.util.Set;
 
 import chat.delta.rpc.RpcException;
+import chat.delta.rpc.types.CallInfo;
+import chat.delta.rpc.types.CallState;
 import chat.delta.rpc.types.Reactions;
 import chat.delta.rpc.types.VcardContact;
 
@@ -589,7 +592,7 @@ public class ConversationItem extends BaseConversationItem
       } catch (RpcException e) {
         Log.e(TAG, "Error in Rpc.callInfo", e);
       }
-      callViewStub.get().setOnClickListener(passthroughClickListener);
+      callViewStub.get().setCallClickListener(new CallClickListener());
       callViewStub.get().setOnLongClickListener(passthroughClickListener);
 
       callViewStub.get().setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS);
@@ -983,4 +986,21 @@ public class ConversationItem extends BaseConversationItem
       }
     }
   }
+
+  private class CallClickListener implements CallItemView.CallClickListener {
+    public void onClick(final View v, final CallInfo callInfo) {
+      if (shouldInterceptClicks(messageRecord) || !batchSelected.isEmpty()) {
+        performClick();
+      } else {
+          int accId = dcContext.getAccountId();
+          int chatId = messageRecord.getChatId();
+          if (!messageRecord.isOutgoing() && callInfo.state instanceof CallState.Alerting) {
+              int callId = messageRecord.getId();
+              VideochatUtil.openCall(getContext(), accId, chatId, callId, callInfo.sdpOffer);
+          } else {
+              VideochatUtil.startCall(getContext(), accId, chatId);
+          }
+      }
+    }
+  }
 }

src/main/java/org/thoughtcrime/securesms/components/CallItemView.java

@@ -4,6 +4,7 @@ import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Color;
 import android.util.AttributeSet;
+import android.view.View;
 import android.widget.FrameLayout;
 import android.widget.ImageView;
 import android.widget.TextView;
@@ -21,6 +22,8 @@ public class CallItemView extends FrameLayout {
   private final @NonNull ImageView icon;
   private final @NonNull TextView title;
   private final @NonNull ConversationItemFooter footer;
+  private CallInfo callInfo;
+  private CallClickListener viewListener;
 
   public CallItemView(Context context) {
     this(context, null);
@@ -38,9 +41,20 @@ public class CallItemView extends FrameLayout {
     this.icon = findViewById(R.id.call_icon);
     this.title = findViewById(R.id.title);
     this.footer = findViewById(R.id.footer);
+
+    setOnClickListener(v -> {
+      if (viewListener != null && callInfo != null) {
+        viewListener.onClick(v, callInfo);
+      }
+    });
+  }
+
+  public void setCallClickListener(CallClickListener listener) {
+    viewListener = listener;
   }
 
   public void setCallItem(boolean isOutgoing, CallInfo callInfo) {
+    this.callInfo = callInfo;
     if (callInfo.state instanceof CallState.Missed) {
       title.setText(R.string.missed_call);
     } else if (callInfo.state instanceof CallState.Cancelled) {
@@ -77,4 +91,8 @@ public class CallItemView extends FrameLayout {
   public String getDescription() {
     return title.getText() + "\n" + footer.getDescription();
   }
+
+  public interface CallClickListener {
+    void onClick(View v, CallInfo callInfo);
+  }
 }

src/main/java/org/thoughtcrime/securesms/videochat/VideochatUtil.java

@@ -2,13 +2,21 @@ package org.thoughtcrime.securesms.videochat;
 
 import android.Manifest;
 import android.app.Activity;
+import android.content.Context;
 import android.content.Intent;
+import android.util.Base64;
+import android.util.Log;
 
 import org.thoughtcrime.securesms.R;
 import org.thoughtcrime.securesms.connect.DcHelper;
 import org.thoughtcrime.securesms.permissions.Permissions;
 
+import java.io.UnsupportedEncodingException;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+
 public class VideochatUtil {
+  private static final String TAG = VideochatUtil.class.getSimpleName();
 
   public static void startCall(Activity activity, int chatId) {
     Permissions.with(activity)
@@ -17,14 +25,36 @@ public class VideochatUtil {
       .withPermanentDenialDialog(activity.getString(R.string.perm_explain_access_to_camera_denied))
       .onAllGranted(() -> {
           int accId = DcHelper.getContext(activity).getAccountId();
-          Intent intent = new Intent(activity, VideochatActivity.class);
+          startCall(activity, accId, chatId);
-          intent.setAction(Intent.ACTION_VIEW);
-          intent.putExtra(VideochatActivity.EXTRA_ACCOUNT_ID, accId);
-          intent.putExtra(VideochatActivity.EXTRA_CHAT_ID, chatId);
-          intent.putExtra(VideochatActivity.EXTRA_HASH, "#startCall");
-          activity.startActivity(intent);
         })
       .execute();
   }
 
+  public static void startCall(Context context, int accId, int chatId) {
+    Intent intent = new Intent(context, VideochatActivity.class);
+    intent.setAction(Intent.ACTION_VIEW);
+    intent.putExtra(VideochatActivity.EXTRA_ACCOUNT_ID, accId);
+    intent.putExtra(VideochatActivity.EXTRA_CHAT_ID, chatId);
+    intent.putExtra(VideochatActivity.EXTRA_HASH, "#startCall");
+    context.startActivity(intent);
+  }
+
+  public static void openCall(Context context, int accId, int chatId, int callId, String payload) {
+    String base64 = Base64.encodeToString(payload.getBytes(StandardCharsets.UTF_8), Base64.NO_WRAP);
+    String hash = "";
+    try {
+      hash = "#offerIncomingCall=" + URLEncoder.encode(base64, "UTF-8");
+    } catch (UnsupportedEncodingException e) {
+      Log.e(TAG, "Error", e);
+    }
+
+    Intent intent = new Intent(context, VideochatActivity.class);
+    intent.setAction(Intent.ACTION_VIEW);
+    intent.putExtra(VideochatActivity.EXTRA_ACCOUNT_ID, accId);
+    intent.putExtra(VideochatActivity.EXTRA_CHAT_ID, chatId);
+    intent.putExtra(VideochatActivity.EXTRA_CALL_ID, callId);
+    intent.putExtra(VideochatActivity.EXTRA_HASH, hash);
+    context.startActivity(intent);
+  }
+
 }