Implement News

app/build.gradle

@@ -12,6 +12,7 @@ android {
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         resValue "string", "google_maps_key", (project.findProperty("GOOGLE_MAPS_API_KEY") ?: "")
+        vectorDrawables.useSupportLibrary = true
     }
     buildTypes {
         release {
@@ -36,6 +37,7 @@ ext {
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'com.android.support:support-v4:27.1.1'
     androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })

app/src/main/java/in/ac/iitb/gymkhana/iitbapp/MainActivity.java

@@ -37,6 +37,7 @@ import in.ac.iitb.gymkhana.iitbapp.fragment.GCRankingsFragment;
 import in.ac.iitb.gymkhana.iitbapp.fragment.MapFragment;
 import in.ac.iitb.gymkhana.iitbapp.fragment.MessMenuFragment;
 import in.ac.iitb.gymkhana.iitbapp.fragment.MyEventsFragment;
+import in.ac.iitb.gymkhana.iitbapp.fragment.NewsFragment;
 import in.ac.iitb.gymkhana.iitbapp.fragment.NotificationsFragment;
 import in.ac.iitb.gymkhana.iitbapp.fragment.PeopleFragment;
 import in.ac.iitb.gymkhana.iitbapp.fragment.PlacementBlogFragment;
@@ -203,6 +204,10 @@ public class MainActivity extends AppCompatActivity implements NavigationView.On
                 MyEventsFragment myeventsFragment = new MyEventsFragment();
                 updateFragment(myeventsFragment);
                 break;
+            case R.id.nav_news:
+                NewsFragment newsFragment = new NewsFragment();
+                updateFragment(newsFragment);
+                break;
             case R.id.nav_placement_blog:
                 PlacementBlogFragment placementBlogFragment = new PlacementBlogFragment();
                 updateFragment(placementBlogFragment);

app/src/main/java/in/ac/iitb/gymkhana/iitbapp/adapter/NewsAdapter.java

+package in.ac.iitb.gymkhana.iitbapp.adapter;
+
+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.TextView;
+
+import java.util.List;
+
+import in.ac.iitb.gymkhana.iitbapp.ItemClickListener;
+import in.ac.iitb.gymkhana.iitbapp.R;
+import in.ac.iitb.gymkhana.iitbapp.data.NewsArticle;
+import ru.noties.markwon.Markwon;
+
+public class NewsAdapter extends RecyclerView.Adapter<NewsAdapter.ViewHolder> {
+
+    private List<NewsArticle> newsArticles;
+    private Context context;
+    private ItemClickListener itemClickListener;
+
+    public NewsAdapter(List<NewsArticle> newsArticles, ItemClickListener itemClickListener) {
+        this.newsArticles = newsArticles;
+        this.itemClickListener = itemClickListener;
+    }
+
+    @NonNull
+    @Override
+    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        context = parent.getContext();
+        LayoutInflater inflater = LayoutInflater.from(context);
+        View newsArticleView = inflater.inflate(R.layout.news_article_card, parent, false);
+
+        final NewsAdapter.ViewHolder articleViewHolder = new NewsAdapter.ViewHolder(newsArticleView);
+        newsArticleView.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                itemClickListener.onItemClick(v, articleViewHolder.getAdapterPosition());
+            }
+        });
+        return articleViewHolder;
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
+        NewsArticle article = newsArticles.get(position);
+        Markwon.setMarkdown(holder.articleTitle, article.getTitle());
+        holder.articlePublished.setText(article.getPublished());
+        Markwon.setMarkdown(holder.articleContent, article.getContent());
+    }
+
+    @Override
+    public int getItemCount() {
+        return newsArticles.size();
+    }
+
+    public class ViewHolder extends RecyclerView.ViewHolder {
+        private TextView articleTitle;
+        private TextView articlePublished;
+        private TextView articleContent;
+
+        public ViewHolder(View itemView) {
+            super(itemView);
+
+            articleTitle = (TextView) itemView.findViewById(R.id.article_title);
+            articlePublished = (TextView) itemView.findViewById(R.id.article_published);
+            articleContent = (TextView) itemView.findViewById(R.id.article_content);
+        }
+    }
+}

app/src/main/java/in/ac/iitb/gymkhana/iitbapp/api/RetrofitInterface.java

@@ -9,6 +9,7 @@ import in.ac.iitb.gymkhana.iitbapp.api.model.ImageUploadResponse;
 import in.ac.iitb.gymkhana.iitbapp.api.model.LoginResponse;
 import in.ac.iitb.gymkhana.iitbapp.api.model.NewsFeedResponse;
 import in.ac.iitb.gymkhana.iitbapp.data.HostelMessMenu;
+import in.ac.iitb.gymkhana.iitbapp.data.NewsArticle;
 import in.ac.iitb.gymkhana.iitbapp.data.PlacementBlogPost;
 import in.ac.iitb.gymkhana.iitbapp.data.TrainingBlogPost;
 import in.ac.iitb.gymkhana.iitbapp.data.User;
@@ -50,6 +51,10 @@ public interface RetrofitInterface {
 
     @GET("mess")
     Call<List<HostelMessMenu>> getInstituteMessMenu(@Header("Cookie") String sessionID);
+
+    @GET("news")
+    Call<List<NewsArticle>> getNews(@Header("Cookie") String sessionID);
+
 //    @POST("getNotifications/")
 //    Call<NotificationsResponse> getNotifications(@Body NotificationsRequest notificationsRequest);
 }

app/src/main/java/in/ac/iitb/gymkhana/iitbapp/data/AppDatabase.java

@@ -6,7 +6,7 @@ import android.arch.persistence.room.RoomDatabase;
 import android.arch.persistence.room.TypeConverters;
 import android.content.Context;
 
-@Database(entities = {Event.class, Body.class, Venue.class, User.class, Role.class, PlacementBlogPost.class, TrainingBlogPost.class, HostelMessMenu.class}, version = 1)
+@Database(entities = {Event.class, Body.class, Venue.class, User.class, Role.class, PlacementBlogPost.class, TrainingBlogPost.class, HostelMessMenu.class, NewsArticle.class}, version = 1)
 @TypeConverters({Converters.class})
 public abstract class AppDatabase extends RoomDatabase {
 

app/src/main/java/in/ac/iitb/gymkhana/iitbapp/data/DbDao.java

@@ -33,12 +33,15 @@ public interface DbDao {
     @Query("SELECT * FROM hostelMessMenus")
     List<HostelMessMenu> getAllHostelMessMenus();
 
-    @Query("SELECT * FROM bodies WHERE id == :id")
-    public Body[] getBody(String id);
+    @Query("SELECT * FROM news")
+    List<NewsArticle> getAllNewsArticles();
 
     @Query("SELECT COUNT(*) from events")
     int countEvents();
 
+    @Query("SELECT * FROM bodies WHERE id == :id")
+    public Body[] getBody(String id);
+
     @Query("SELECT COUNT(*) from venues")
     int countVenues();
 
@@ -102,6 +105,12 @@ public interface DbDao {
     @Insert
     void insertHostelMessMenus(List<HostelMessMenu> hostelMessMenus);
 
+    @Insert
+    void insertNewsArticle(NewsArticle newsArticle);
+
+    @Insert
+    void insertNewsArticles(List<NewsArticle> newsArticles);
+
     @Delete
     void deleteEvent(Event event);
 
@@ -140,4 +149,7 @@ public interface DbDao {
 
     @Query("DELETE from hostelMessMenus")
     void deleteHostelMessMenus();
+
+    @Query("DELETE from news")
+    void deleteNewsArticles();
 }

app/src/main/java/in/ac/iitb/gymkhana/iitbapp/data/NewsArticle.java

+package in.ac.iitb.gymkhana.iitbapp.data;
+
+import android.arch.persistence.room.ColumnInfo;
+import android.arch.persistence.room.Entity;
+import android.arch.persistence.room.PrimaryKey;
+
+import com.google.gson.annotations.SerializedName;
+
+import java.util.Map;
+
+@Entity(tableName = "news")
+
+public class NewsArticle {
+
+    @PrimaryKey(autoGenerate = true)
+    int db_id;
+
+    @ColumnInfo(name = "id")
+    @SerializedName("id")
+    private String articleID;
+
+    @ColumnInfo(name = "link")
+    @SerializedName("link")
+    private String link;
+
+    @ColumnInfo(name = "title")
+    @SerializedName("title")
+    private String title;
+
+    @ColumnInfo(name = "content")
+    @SerializedName("content")
+    private String content;
+
+    @ColumnInfo(name = "published")
+    @SerializedName("published")
+    private String published;
+
+    @ColumnInfo(name = "body")
+    @SerializedName("body")
+    private Body body;
+
+    public NewsArticle(String articleID, String link, String title, String content, String published, Body body) {
+        this.articleID = articleID;
+        this.link = link;
+        this.title = title;
+        this.content = content;
+        this.published = published;
+        this.body = body;
+    }
+
+    public String getArticleID() {
+        return articleID;
+    }
+
+    public void setArticleID(String articleID) {
+        this.articleID = articleID;
+    }
+
+    public String getLink() {
+        return link;
+    }
+
+    public void setLink(String link) {
+        this.link = link;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+
+    public String getPublished() {
+        return published;
+    }
+
+    public void setPublished(String published) {
+        this.published = published;
+    }
+
+    public Body getBody() {
+        return body;
+    }
+
+    public void setBody(Body body) {
+        this.body = body;
+    }
+}

app/src/main/java/in/ac/iitb/gymkhana/iitbapp/fragment/NewsFragment.java

+package in.ac.iitb.gymkhana.iitbapp.fragment;
+
+
+import android.app.Activity;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.support.v4.app.Fragment;
+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;
+
+import java.util.List;
+
+import in.ac.iitb.gymkhana.iitbapp.ActivityBuffer;
+import in.ac.iitb.gymkhana.iitbapp.Constants;
+import in.ac.iitb.gymkhana.iitbapp.ItemClickListener;
+import in.ac.iitb.gymkhana.iitbapp.R;
+import in.ac.iitb.gymkhana.iitbapp.adapter.NewsAdapter;
+import in.ac.iitb.gymkhana.iitbapp.api.RetrofitInterface;
+import in.ac.iitb.gymkhana.iitbapp.api.ServiceGenerator;
+import in.ac.iitb.gymkhana.iitbapp.data.AppDatabase;
+import in.ac.iitb.gymkhana.iitbapp.data.NewsArticle;
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
+/**
+ * A simple {@link Fragment} subclass.
+ */
+public class NewsFragment extends BaseFragment {
+
+    private RecyclerView newsRecyclerView;
+    private SwipeRefreshLayout newsSwipeRefreshLayout;
+    private AppDatabase appDatabase;
+
+    public NewsFragment() {
+        // Required empty public constructor
+    }
+
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_news, container, false);
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+
+        appDatabase = AppDatabase.getAppDatabase(getContext());
+        new NewsFragment.showNewsFromDB().execute();
+
+        updateNews();
+
+        newsSwipeRefreshLayout = getActivity().findViewById(R.id.news_swipe_refresh_layout);
+        newsSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
+            @Override
+            public void onRefresh() {
+                updateNews();
+            }
+        });
+    }
+
+    private void updateNews() {
+        RetrofitInterface retrofitInterface = ServiceGenerator.createService(RetrofitInterface.class);
+        retrofitInterface.getNews("sessionid=" + getArguments().getString(Constants.SESSION_ID)).enqueue(new Callback<List<NewsArticle>>() {
+            @Override
+            public void onResponse(Call<List<NewsArticle>> call, Response<List<NewsArticle>> response) {
+                if (response.isSuccessful()) {
+                    List<NewsArticle> articles = response.body();
+                    displayNews(articles);
+
+                    new updateDatabase().execute(articles);
+                }
+                //Server Error
+                newsSwipeRefreshLayout.setRefreshing(false);
+            }
+
+            @Override
+            public void onFailure(Call<List<NewsArticle>> call, Throwable t) {
+                //Network Error
+                newsSwipeRefreshLayout.setRefreshing(false);
+            }
+        });
+    }
+
+    private void displayNews(final List<NewsArticle> result) {
+        final NewsAdapter newsAdapter = new NewsAdapter(result, new ItemClickListener() {
+            @Override
+            public void onItemClick(View v, int position) {
+                openWebURL(result.get(position).getLink());
+            }
+        });
+        getActivityBuffer().safely(new ActivityBuffer.IRunnable() {
+            @Override
+            public void run(Activity pActivity) {
+                try {
+                    newsRecyclerView = getActivity().findViewById(R.id.news_recycler_view);
+                    newsRecyclerView.setAdapter(newsAdapter);
+                    newsRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
+                } catch (NullPointerException e) {
+                    e.printStackTrace();
+                }
+            }
+        });
+    }
+
+    private void openWebURL(String URL) {
+        Intent browse = new Intent(Intent.ACTION_VIEW, Uri.parse(URL));
+        startActivity(browse);
+    }
+
+    private class updateDatabase extends AsyncTask<List<NewsArticle>, Void, Integer> {
+        @Override
+        protected Integer doInBackground(List<NewsArticle>... posts) {
+            appDatabase.dbDao().deleteNewsArticles();
+            appDatabase.dbDao().insertNewsArticles(posts[0]);
+            return 1;
+        }
+    }
+
+    private class showNewsFromDB extends AsyncTask<String, Void, List<NewsArticle>> {
+        @Override
+        protected List<NewsArticle> doInBackground(String... posts) {
+            return appDatabase.dbDao().getAllNewsArticles();
+        }
+
+        protected void onPostExecute(List<NewsArticle> result) {
+            displayNews(result);
+        }
+    }
+}

app/src/main/res/drawable/baseline_rss_feed_24.xml

+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0"
+        android:tint="?attr/colorControlNormal">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M6.18,17.82m-2.18,0a2.18,2.18 0,1 1,4.36 0a2.18,2.18 0,1 1,-4.36 0"/>
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M4,4.44v2.83c7.03,0 12.73,5.7 12.73,12.73h2.83c0,-8.59 -6.97,-15.56 -15.56,-15.56zM4,10.1v2.83c3.9,0 7.07,3.17 7.07,7.07h2.83c0,-5.47 -4.43,-9.9 -9.9,-9.9z"/>
+</vector>

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

+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="in.ac.iitb.gymkhana.iitbapp.fragment.NewsFragment">
+
+    <android.support.v4.widget.SwipeRefreshLayout
+        android:id="@+id/news_swipe_refresh_layout"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        tools:context="in.ac.iitb.gymkhana.iitbapp.fragment.NewsFragment">
+
+        <android.support.v7.widget.RecyclerView
+            android:id="@+id/news_recycler_view"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:paddingTop="8dp" />
+
+    </android.support.v4.widget.SwipeRefreshLayout>
+</RelativeLayout>

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

+<?xml version="1.0" encoding="utf-8"?>
+<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:card_view="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginBottom="4dp"
+    android:layout_marginLeft="8dp"
+    android:layout_marginRight="8dp"
+    android:layout_marginTop="4dp"
+    card_view:cardCornerRadius="4dp"
+    card_view:cardElevation="4dp">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_margin="16dp"
+        android:orientation="vertical">
+
+        <TextView
+            android:id="@+id/article_title"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:textColor="#000000"
+            android:textSize="20sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/article_published"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" />
+
+        <TextView
+            android:id="@+id/article_content"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:textColor="#000000" />
+    </LinearLayout>
+</android.support.v7.widget.CardView>
\ No newline at end of file

app/src/main/res/menu/activity_main_drawer.xml

@@ -14,6 +14,11 @@
             android:icon="@drawable/ic_event"
             android:title="My Events" />
 
+        <item
+            android:id="@+id/nav_news"
+            android:icon="@drawable/baseline_rss_feed_black_48"
+            android:title="News" />
+
         <item
             android:id="@+id/nav_placement_blog"
             android:icon="@drawable/ic_work_black_48dp"