save unfinished replies as drafts

app/src/main/java/gr/thmmy/mthmmy/activities/topic/TopicActivity.java

@@ -4,6 +4,7 @@ import android.annotation.SuppressLint;
 import android.app.NotificationManager;
 import android.content.Context;
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.graphics.Rect;
 import android.net.Uri;
 import android.os.Build;
@@ -270,6 +271,12 @@ public class TopicActivity extends BaseActivity implements TopicAdapter.OnPostFo
             emojiKeyboard.setVisibility(View.GONE);
             return;
         } else if (viewModel.isWritingReply()) {
+            // persist reply
+            SharedPreferences drafts = getSharedPreferences(getString(R.string.pref_topic_drafts_key), MODE_PRIVATE);
+            TopicAdapter.QuickReplyViewHolder replyHolder = (TopicAdapter.QuickReplyViewHolder)
+                    recyclerView.findViewHolderForAdapterPosition(topicItems.size() - 1);
+            drafts.edit().putString(String.valueOf(viewModel.getTopicId()), replyHolder.replyEditor.getText().toString()).apply();
+
             topicItems.remove(topicItems.size() - 1);
             topicAdapter.notifyItemRemoved(topicItems.size());
             topicAdapter.setBackButtonHidden();
@@ -303,6 +310,18 @@ public class TopicActivity extends BaseActivity implements TopicAdapter.OnPostFo
         viewModel.stopLoading();
     }
 
+    @Override
+    protected void onStop() {
+        super.onStop();
+        // persist reply
+        if (viewModel.isWritingReply()) {
+            SharedPreferences drafts = getSharedPreferences(getString(R.string.pref_topic_drafts_key), MODE_PRIVATE);
+            TopicAdapter.QuickReplyViewHolder replyHolder = (TopicAdapter.QuickReplyViewHolder)
+                    recyclerView.findViewHolderForAdapterPosition(topicItems.size() - 1);
+            drafts.edit().putString(String.valueOf(viewModel.getTopicId()), replyHolder.replyEditor.getText().toString()).apply();
+        }
+    }
+
     @Override
     public void onPostFocusChange(int position) {
         recyclerView.scrollToPosition(position);

app/src/main/java/gr/thmmy/mthmmy/activities/topic/TopicAdapter.java

@@ -4,6 +4,7 @@ import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.graphics.Color;
 import android.graphics.Typeface;
 import android.graphics.drawable.Drawable;
@@ -632,6 +633,10 @@ class TopicAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
                     holder.itemView.setEnabled(false);
                     emojiKeyboard.hide();
 
+                    SharedPreferences drafts = context.getSharedPreferences(context.getString(R.string.pref_topic_drafts_key),
+                            Context.MODE_PRIVATE);
+                    drafts.edit().remove(String.valueOf(viewModel.getTopicId())).apply();
+
                     viewModel.postReply(context, holder.quickReplySubject.getText().toString(),
                             holder.replyEditor.getText().toString());
                 });
@@ -639,8 +644,12 @@ class TopicAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
 
                 if (reply.getContent() != null) {
                     holder.replyEditor.setText(reply.getContent());
-                } else {
+                } else if (viewModel.getBuildedQuotes() != null && !viewModel.getBuildedQuotes().isEmpty()) {
                     holder.replyEditor.setText(viewModel.getBuildedQuotes());
+                } else {
+                    SharedPreferences drafts = context.getSharedPreferences(context.getString(R.string.pref_topic_drafts_key),
+                            Context.MODE_PRIVATE);
+                    holder.replyEditor.setText(drafts.getString(String.valueOf(viewModel.getTopicId()), ""));
                 }
 
                 if (backPressHidden) {

app/src/main/java/gr/thmmy/mthmmy/viewmodel/TopicViewModel.java

@@ -313,6 +313,12 @@ public class TopicViewModel extends BaseViewModel implements TopicTask.OnTopicTa
 
     // <-------------Just getters, setters and helper methods below here---------------->
 
+    public int getTopicId() {
+        if (pageTopicId.getValue() == null)
+            throw  new NullPointerException("No page has been loaded yet!");
+        return pageTopicId.getValue();
+    }
+
 
     public void setRemoveVoteTaskStartedListener(ExternalAsyncTask.OnTaskStartedListener removeVoteTaskStartedListener) {
         this.removeVoteTaskStartedListener = removeVoteTaskStartedListener;

app/src/main/res/values/strings.xml

@@ -75,6 +75,7 @@
         <item quantity="other">You may only select %d options</item>
     </plurals>
     <string name="show_vote_options_button">hide results</string>
+    <string name="pref_topic_drafts_key">preference-topic-drafts-key</string>
 
     <!--Profile Activity-->
     <string name="username">Username</string>