Forum section init

app/build.gradle

@@ -43,6 +43,8 @@ dependencies {
     }
     compile 'com.mikepenz:fontawesome-typeface:4.7.0.0@aar'
     compile 'pl.droidsonroids.gif:android-gif-drawable:1.2.3'
+    compile 'com.google.code.gson:gson:2.8.0'
+    compile 'com.bignerdranch.android:expandablerecyclerview:3.0.0-RC1'
 }
 
 apply plugin: 'com.google.gms.google-services'

app/src/main/java/gr/thmmy/mthmmy/activities/main/forum/ForumAdapter.java

@@ -1,16 +1,24 @@
 package gr.thmmy.mthmmy.activities.main.forum;
 
 import android.content.Context;
+import android.support.annotation.NonNull;
 import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.ImageView;
 import android.widget.TextView;
 
+import com.bignerdranch.expandablerecyclerview.ChildViewHolder;
+import com.bignerdranch.expandablerecyclerview.ExpandableRecyclerAdapter;
+import com.bignerdranch.expandablerecyclerview.ParentViewHolder;
+
 import java.util.List;
 
 import gr.thmmy.mthmmy.R;
 import gr.thmmy.mthmmy.activities.base.BaseFragment;
+import gr.thmmy.mthmmy.data.Board;
+import gr.thmmy.mthmmy.data.Category;
 import gr.thmmy.mthmmy.data.TopicSummary;
 
 
@@ -18,68 +26,90 @@ import gr.thmmy.mthmmy.data.TopicSummary;
  * {@link RecyclerView.Adapter} that can display a {@link TopicSummary} and makes a call to the
  * specified {@link ForumFragment.ForumFragmentInteractionListener}.
  */
-class ForumAdapter extends RecyclerView.Adapter<ForumAdapter.ViewHolder> {
+class ForumAdapter extends ExpandableRecyclerAdapter<Category, Board, ForumAdapter.CategoryViewHolder, ForumAdapter.BoardViewHolder> {
     private final Context context;
-    private final List<TopicSummary> recentList;
+    private final LayoutInflater layoutInflater;
+
+    private final List<Category> categories;
     private final ForumFragment.ForumFragmentInteractionListener mListener;
 
-    ForumAdapter(Context context, List<TopicSummary> topicSummaryList, BaseFragment.FragmentInteractionListener listener) {
+    ForumAdapter(Context context, @NonNull List<Category> categories, BaseFragment.FragmentInteractionListener listener) {
+        super(categories);
         this.context = context;
-        this.recentList = topicSummaryList;
+        this.categories = categories;
         mListener = (ForumFragment.ForumFragmentInteractionListener)listener;
+        layoutInflater = LayoutInflater.from(context);
     }
 
+    @NonNull
+    @Override
+    public CategoryViewHolder onCreateParentViewHolder(@NonNull ViewGroup parentViewGroup, int viewType) {
+        View categoryView = layoutInflater.inflate(R.layout.fragment_forum_category_row, parentViewGroup, false);
+        return new CategoryViewHolder(categoryView);
+    }
 
+    @NonNull
     @Override
-    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
-        View view = LayoutInflater.from(parent.getContext())
-                .inflate(R.layout.fragment_recent_row, parent, false);
-        return new ViewHolder(view);
+    public BoardViewHolder onCreateChildViewHolder(@NonNull ViewGroup childViewGroup, int viewType) {
+        View boardView = layoutInflater.inflate(R.layout.fragment_forum_board_row, childViewGroup, false);
+        return new BoardViewHolder(boardView);
     }
 
+    @Override
+    public void onBindParentViewHolder(@NonNull CategoryViewHolder parentViewHolder, int parentPosition, @NonNull Category parent) {
+        parentViewHolder.bind(parent);
+    }
 
     @Override
-    public void onBindViewHolder(final ViewHolder holder, final int position) {
+    public void onBindChildViewHolder(@NonNull BoardViewHolder childViewHolder, int parentPosition, int childPosition, @NonNull Board child) {
+        childViewHolder.bind(child);
+    }
 
-        holder.mTitleView.setText(recentList.get(position).getTitle());
-        holder.mDateTimeView.setText(recentList.get(position).getDateTimeModified());
-        holder.mUserView.setText(context.getString(R.string.byUser, recentList.get(position).getLastUser()));
 
-        holder.topic = recentList.get(position);
+    class CategoryViewHolder extends ParentViewHolder {
 
-        holder.mView.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
+        private TextView categoryTextview;
+        private ImageView arrowImageView;
 
-                if (null != mListener) {
-                    // Notify the active callbacks interface (the activity, if the
-                    // fragment is attached to one) that an item has been selected.
-                    mListener.onFragmentInteraction(holder.topic);  //?
+        CategoryViewHolder(View itemView) {
+            super(itemView);
+            categoryTextview = (TextView) itemView.findViewById(R.id.category);
 
+            arrowImageView = (ImageView) itemView.findViewById(R.id.arrow); //todo animated arrow up/down
+            arrowImageView.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    if (isExpanded()) {
+                        collapseView();
+                    } else {
+                        expandView();
                     }
-
                 }
             });
         }
 
+        void bind(Category category) {
+            categoryTextview.setText(category.getName());
+        }
+
         @Override
-    public int getItemCount() {
-        return recentList.size();
+        public boolean shouldItemViewClickToggleExpansion() {
+            return false;
+        }
+
+    }
+
+    class BoardViewHolder extends ChildViewHolder {
+
+        private TextView boardTextView;
+
+        BoardViewHolder(View itemView) {
+            super(itemView);
+            boardTextView = (TextView) itemView.findViewById(R.id.board);
         }
 
-    class ViewHolder extends RecyclerView.ViewHolder {
-        final View mView;
-        final TextView mTitleView;
-        final TextView mUserView;
-        final TextView mDateTimeView;
-        public TopicSummary topic;
-
-        ViewHolder(View view) {
-            super(view);
-            mView = view;
-            mTitleView = (TextView) view.findViewById(R.id.title);
-            mUserView = (TextView) view.findViewById(R.id.lastUser);
-            mDateTimeView = (TextView) view.findViewById(R.id.dateTime);
+        void bind(Board board) {
+            boardTextView.setText(board.getName());
         }
     }
 }

app/src/main/java/gr/thmmy/mthmmy/activities/main/forum/ForumFragment.java

@@ -2,8 +2,8 @@ package gr.thmmy.mthmmy.activities.main.forum;
 
 import android.os.AsyncTask;
 import android.os.Bundle;
-import android.support.v4.widget.SwipeRefreshLayout;
 import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -11,21 +11,23 @@ import android.widget.ProgressBar;
 import android.widget.RelativeLayout;
 import android.widget.Toast;
 
+import com.bignerdranch.expandablerecyclerview.ExpandableRecyclerAdapter;
+
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
 import org.jsoup.select.Elements;
 
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 
 import gr.thmmy.mthmmy.R;
 import gr.thmmy.mthmmy.activities.base.BaseFragment;
+import gr.thmmy.mthmmy.data.Board;
+import gr.thmmy.mthmmy.data.Category;
 import gr.thmmy.mthmmy.data.TopicSummary;
 import gr.thmmy.mthmmy.session.SessionManager;
-import gr.thmmy.mthmmy.utils.CustomRecyclerView;
 import mthmmy.utils.Report;
 import okhttp3.HttpUrl;
 import okhttp3.Request;
@@ -45,10 +47,9 @@ public class ForumFragment extends BaseFragment
     // Fragment initialization parameters, e.g. ARG_SECTION_NUMBER
 
     private ProgressBar progressBar;
-    private SwipeRefreshLayout swipeRefreshLayout;
     private ForumAdapter forumAdapter;
 
-    private List<TopicSummary> topicSummaries;
+    private List<Category> categories;
 
     private ForumTask forumTask;
 
@@ -72,13 +73,13 @@ public class ForumFragment extends BaseFragment
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        topicSummaries = new ArrayList<>();
+        categories = new ArrayList<>();
     }
 
     @Override
     public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);
-        if (topicSummaries.isEmpty())
+        if (categories.isEmpty())
         {
             forumTask =new ForumTask();
             forumTask.execute();
@@ -91,30 +92,36 @@ public class ForumFragment extends BaseFragment
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         // Inflate the layout for this fragment
-        final View rootView = inflater.inflate(R.layout.fragment_recent, container, false);
+        final View rootView = inflater.inflate(R.layout.fragment_forum, container, false);
 
         // Set the adapter
         if (rootView instanceof RelativeLayout) {
             progressBar = (ProgressBar) rootView.findViewById(R.id.progressBar);
-            forumAdapter = new ForumAdapter(getActivity(), topicSummaries, fragmentInteractionListener);
-
-            CustomRecyclerView recyclerView = (CustomRecyclerView) rootView.findViewById(R.id.list);
-            recyclerView.setLayoutManager(new LinearLayoutManager(rootView.findViewById(R.id.list).getContext()));
-            recyclerView.setAdapter(forumAdapter);
-
-            swipeRefreshLayout = (SwipeRefreshLayout) rootView.findViewById(R.id.swiperefresh);
-            swipeRefreshLayout.setOnRefreshListener(
-                    new SwipeRefreshLayout.OnRefreshListener() {
+            forumAdapter = new ForumAdapter(getContext(), categories, fragmentInteractionListener);
+            forumAdapter.setExpandCollapseListener(new ExpandableRecyclerAdapter.ExpandCollapseListener() {
                 @Override
-                        public void onRefresh() {
-                            if (forumTask != null && forumTask.getStatus() != AsyncTask.Status.RUNNING) {
+                public void onParentExpanded(int parentPosition) {
+                    if(forumTask.getStatus()== AsyncTask.Status.RUNNING)
+                        forumTask.cancel(true);
                     forumTask =new ForumTask();
+                    forumTask.setUrl(categories.get(parentPosition).getCategoryURL());
                     forumTask.execute();
                 }
-                        }
 
+                @Override
+                public void onParentCollapsed(int parentPosition) {
+                    if(forumTask.getStatus()== AsyncTask.Status.RUNNING)
+                        forumTask.cancel(true);
+                    forumTask =new ForumTask();
+                    forumTask.setUrl(categories.get(parentPosition).getCategoryURL());
+                    forumTask.execute();
                 }
-            );
+            });
+
+            RecyclerView recyclerView = (RecyclerView) rootView.findViewById(R.id.list);
+            recyclerView.setLayoutManager(new LinearLayoutManager(rootView.findViewById(R.id.list).getContext()));
+            recyclerView.setAdapter(forumAdapter);
+
         }
         return rootView;
     }
@@ -134,25 +141,30 @@ public class ForumFragment extends BaseFragment
 
     public class ForumTask extends AsyncTask<Void, Void, Integer> {
         private static final String TAG = "ForumTask";
-        private final HttpUrl thmmyUrl = SessionManager.indexUrl;
-
+        private HttpUrl forumUrl = SessionManager.forumUrl;   //may change upon collapse/expand
         private Document document;
 
+        private List<Category> fetchedCategories;
 
-        protected void onPreExecute() {
+        ForumTask() {
+            fetchedCategories = new ArrayList<>();
+        }
 
+        protected void onPreExecute() {
             progressBar.setVisibility(ProgressBar.VISIBLE);
         }
 
         protected Integer doInBackground(Void... voids) {
-
             Request request = new Request.Builder()
-                    .url(thmmyUrl)
+                    .url(forumUrl)
                     .build();
             try {
                 Response response = client.newCall(request).execute();
                 document = Jsoup.parse(response.body().string());
                 parse(document);
+                categories.clear();
+                categories.addAll(fetchedCategories);
+                fetchedCategories.clear();
                 return 0;
             } catch (IOException e) {
                 Report.d(TAG, "Network Error", e);
@@ -168,51 +180,46 @@ public class ForumFragment extends BaseFragment
         protected void onPostExecute(Integer result) {
 
             if (result == 0)
-                forumAdapter.notifyDataSetChanged();
+                forumAdapter.notifyParentDataSetChanged(false);
             else if (result == 1)
                 Toast.makeText(getActivity(), "Network error", Toast.LENGTH_SHORT).show();
 
             progressBar.setVisibility(ProgressBar.INVISIBLE);
-            swipeRefreshLayout.setRefreshing(false);
         }
 
-        private void parse(Document document) {
-            Elements recent = document.select("#block8 :first-child div");
-            if (recent.size() == 30) {
-                topicSummaries.clear();
-
-                for (int i = 0; i < recent.size(); i += 3) {
-                    String link = recent.get(i).child(0).attr("href");
-                    String title = recent.get(i).child(0).attr("title");
+        private void parse(Document document)
+        {
+            Elements categoryBlocks = document.select(".tborder:not([style])>table[cellpadding=5]");
+            if (categoryBlocks.size() != 0) {
+                for(Element categoryBlock: categoryBlocks)
+                {
+                    Element categoryElement = categoryBlock.select("td[colspan=2]>[name]").first();
+                    String categoryUrl = categoryElement.attr("href");
+                    Category category = new Category(categoryElement.text(), categoryUrl);
 
-                    String lastUser = recent.get(i + 1).text();
-                    Pattern pattern = Pattern.compile("\\b (.*)");
-                    Matcher matcher = pattern.matcher(lastUser);
-                    if (matcher.find())
-                        lastUser = matcher.group(1);
-                    else {
-                        Report.e(TAG, "Parsing failed (lastUser)!");
-                        return;
+                    category.setExpanded(categoryUrl.contains("sa=collapse"));
+                    if(categoryUrl.contains("sa=collapse"))
+                    {
+                        category.setExpanded(true);
+                        Elements boardsElements = categoryBlock.select("b [name]");
+                        for(Element boardElement: boardsElements) {
+                            Board board = new Board(boardElement.text(), boardElement.attr("href"));
+                            category.getBoards().add(board);
                         }
-
-                    String dateTime = recent.get(i + 2).text();
-                    pattern = Pattern.compile("\\[(.*)\\]");
-                    matcher = pattern.matcher(dateTime);
-                    if (matcher.find())
-                        dateTime = matcher.group(1);
-                    else {
-                        Report.e(TAG, "Parsing failed (dateTime)!");
-                        return;
                     }
+                    else
+                        category.setExpanded(false);
 
-
-                    topicSummaries.add(new TopicSummary(link, title, lastUser, dateTime));
+                    fetchedCategories.add(category);
                 }
-
-                return;
             }
+            else
                 Report.e(TAG, "Parsing failed!");
         }
-    }
 
+        public void setUrl(String string)
+        {
+            forumUrl = HttpUrl.parse(string);
+        }
+    }
 }

app/src/main/java/gr/thmmy/mthmmy/activities/main/recent/RecentAdapter.java

@@ -1,6 +1,7 @@
 package gr.thmmy.mthmmy.activities.main.recent;
 
 import android.content.Context;
+import android.support.annotation.NonNull;
 import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -23,7 +24,7 @@ class RecentAdapter extends RecyclerView.Adapter<RecentAdapter.ViewHolder> {
     private final List<TopicSummary> recentList;
     private final RecentFragment.RecentFragmentInteractionListener mListener;
 
-    RecentAdapter(Context context, List<TopicSummary> topicSummaryList, BaseFragment.FragmentInteractionListener listener) {
+    RecentAdapter(Context context, @NonNull List<TopicSummary> topicSummaryList, BaseFragment.FragmentInteractionListener listener) {
         this.context = context;
         this.recentList = topicSummaryList;
         mListener = (RecentFragment.RecentFragmentInteractionListener) listener;

app/src/main/java/gr/thmmy/mthmmy/activities/main/recent/RecentFragment.java

@@ -135,12 +135,10 @@ public class RecentFragment extends BaseFragment {
     //---------------------------------------ASYNC TASK-----------------------------------
 
     public class RecentTask extends AsyncTask<Void, Void, Integer> {
-        private static final String TAG = "ForumTask";
+        private static final String TAG = "RecentTask";
         private final HttpUrl thmmyUrl = SessionManager.indexUrl;
-
         private Document document;
 
-
         protected void onPreExecute() {
 
             progressBar.setVisibility(ProgressBar.VISIBLE);

app/src/main/java/gr/thmmy/mthmmy/data/Board.java

@@ -0,0 +1,34 @@
+package gr.thmmy.mthmmy.data;
+
+import java.util.ArrayList;
+
+public class Board {
+    private final String name;
+    private final String boardURL;
+
+    private ArrayList <Board> subBoards;
+    private ArrayList <TopicSummary> topicSummaries;
+
+    public Board(String name, String boardURL) {
+        this.name = name;
+        this.boardURL = boardURL;
+        subBoards = new ArrayList<>();
+        topicSummaries = new ArrayList<>();
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getBoardURL() {
+        return boardURL;
+    }
+
+    public ArrayList<Board> getSubBoards() {
+        return subBoards;
+    }
+
+    public ArrayList<TopicSummary> getTopicSummaries() {
+        return topicSummaries;
+    }
+}

app/src/main/java/gr/thmmy/mthmmy/data/Category.java

@@ -0,0 +1,58 @@
+package gr.thmmy.mthmmy.data;
+
+import com.bignerdranch.expandablerecyclerview.model.Parent;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static android.R.attr.id;
+
+public class Category implements Parent<Board>
+{
+    private final String name;
+    private final String categoryURL;
+    private boolean expanded = false;
+    private List<Board> boards;
+
+    public Category(String name, String categoryURL) {
+        this.name = name;
+        this.categoryURL = categoryURL;
+        boards = new ArrayList<>();
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getCategoryURL() {
+        return categoryURL;
+    }
+
+    public boolean isExpanded() {
+        return expanded;
+    }
+
+    public List<Board> getBoards() {
+        return boards;
+    }
+
+    public void setExpanded(boolean expanded) {
+        this.expanded = expanded;
+    }
+
+    @Override
+    public List<Board> getChildList() {
+        return getBoards();
+    }
+
+    @Override
+    public boolean isInitiallyExpanded() {
+        return expanded;
+    }
+
+
+}

app/src/main/java/gr/thmmy/mthmmy/session/SessionManager.java

@@ -36,6 +36,7 @@ public class SessionManager
 
     //Generic constants
     public static final HttpUrl indexUrl = HttpUrl.parse("https://www.thmmy.gr/smf/index.php");
+    public static final HttpUrl forumUrl = HttpUrl.parse("https://www.thmmy.gr/smf/index.php?action=forum");
     private static final HttpUrl loginUrl = HttpUrl.parse("https://www.thmmy.gr/smf/index.php?action=login2");
     private static final String guestName = "Guest";
 

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

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <android.support.v7.widget.RecyclerView
+        android:id="@+id/list"
+        android:name="gr.thmmy.mthmmy.sections.forum.ForumFragment"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="@color/background"
+        android:clipToPadding="false"
+        android:paddingBottom="4dp"
+        android:paddingTop="4dp"
+        app:layoutManager="LinearLayoutManager"
+        tools:context=".activities.main.forum.ForumFragment" />
+
+    <ProgressBar
+        android:id="@+id/progressBar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerHorizontal="true"
+        android:layout_centerVertical="true"
+        android:visibility="invisible"/>
+
+</RelativeLayout>

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

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="wrap_content"
+              android:layout_height="wrap_content"
+              android:orientation="vertical"
+              android:paddingEnd="4dp"
+              android:paddingStart="4dp">
+
+    <TextView
+        android:id="@+id/board"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textAppearance="?attr/textAppearanceListItem"
+        android:textColor="@color/primary_text"/>
+
+</LinearLayout>

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

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:paddingEnd="4dp"
+    android:paddingStart="4dp">
+
+    <TextView
+        android:id="@+id/category"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentStart="true"
+        android:textAppearance="?attr/textAppearanceListItem"
+        android:textColor="@color/md_yellow_600"/>
+
+    <ImageView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentEnd="true"
+        app:srcCompat="@android:drawable/arrow_down_float"
+        android:id="@+id/arrow"
+        android:contentDescription="arrow" />
+
+
+</RelativeLayout>

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

@@ -11,10 +11,9 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
-        <view
+        <gr.thmmy.mthmmy.utils.CustomRecyclerView
             android:id="@+id/list"
             android:name="gr.thmmy.mthmmy.sections.recent.RecentFragment"
-            class="gr.thmmy.mthmmy.utils.CustomRecyclerView"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:background="@color/background"