Refactor dashboard fragment

app/src/main/java/in/testpress/testpress/TestpressModule.java

@@ -45,7 +45,7 @@
 import in.testpress.testpress.ui.ProfileDetailsActivity;
 import in.testpress.testpress.ui.ProfilePhotoActivity;
 import in.testpress.testpress.ui.WebViewActivity;
-import in.testpress.testpress.ui.fragments.DashboardFragment;
+import in.testpress.testpress.ui.fragments.DashBoardFragment;
 import in.testpress.testpress.ui.fragments.OTPVerificationFragment;
 import in.testpress.testpress.ui.fragments.PhoneAuthenticationFragment;
 import in.testpress.testpress.ui.fragments.UsernameAuthentication;
@@ -89,7 +89,7 @@
                 ForumActivity.class,
                 CreateForumActivity.class,
                 WebViewActivity.class,
-                DashboardFragment.class,
+                DashBoardFragment.class,
                 DoubtsActivity.class,
                 LoginActivityV2.class,
                 UsernameAuthentication.class,

app/src/main/java/in/testpress/testpress/network/AppService.kt

@@ -5,10 +5,11 @@ import `in`.testpress.network.TestpressApiClient
 import `in`.testpress.testpress.BuildConfig
 import `in`.testpress.testpress.core.Constants
 import `in`.testpress.testpress.models.InstituteSettings
+import `in`.testpress.testpress.models.pojo.DashboardResponse
 import `in`.testpress.testpress.models.pojo.GenerateOTPResponse
 import `in`.testpress.testpress.models.pojo.OTPLoginResponse
 import android.content.Context
-import retrofit.http.GET
+import retrofit2.http.GET
 import retrofit2.http.Body
 import retrofit2.http.POST
 import kotlin.collections.HashMap
@@ -17,6 +18,10 @@ const val OTP_URL = "/api/v2.5/auth/generate-otp/"
 const val VERIFY_OTP_URL = "/api/v2.5/auth/otp-login/"
 
 interface AppService {
+
+    @GET("/api/v2.4/dashboard/")
+    fun getDashBoardData():RetrofitCall<DashboardResponse>
+
     @GET(Constants.Http.URL_INSTITUTE_SETTINGS_FRAG)
     fun getInstituteSettings(): RetrofitCall<InstituteSettings>
 
@@ -31,6 +36,10 @@ interface AppService {
 class AppNetwork(context: Context) : TestpressApiClient(BuildConfig.BASE_URL, context) {
     private fun getAppService() = retrofit.create(AppService::class.java)
 
+    fun getDashBoardData():RetrofitCall<DashboardResponse>{
+        return getAppService().getDashBoardData()
+    }
+
     fun getInstituteSettings(): RetrofitCall<InstituteSettings> {
         return getAppService().getInstituteSettings()
     }

app/src/main/java/in/testpress/testpress/repository/DashBoardRepository.kt

@@ -0,0 +1,46 @@
+package `in`.testpress.testpress.repository
+
+import `in`.testpress.network.NetworkBoundResource
+import `in`.testpress.network.Resource
+import `in`.testpress.network.RetrofitCall
+import `in`.testpress.testpress.models.pojo.DashboardResponse
+import `in`.testpress.testpress.network.AppNetwork
+import `in`.testpress.testpress.util.PreferenceManager
+import android.content.Context
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import com.google.gson.GsonBuilder
+
+class DashBoardRepository(
+    val context: Context
+) {
+    private val service = AppNetwork(context)
+
+    fun loadData(): LiveData<Resource<DashboardResponse>> {
+        return object : NetworkBoundResource<DashboardResponse, DashboardResponse>() {
+
+            override fun loadFromDb(): LiveData<DashboardResponse> {
+                val liveData = MutableLiveData<DashboardResponse>()
+                liveData.postValue(
+                    PreferenceManager.getDashboardDataPreferences(context)
+                )
+                return liveData
+            }
+
+            override fun saveNetworkResponseToDB(item: DashboardResponse) {
+                val gson = GsonBuilder().setPrettyPrinting().create()
+                val json = gson.toJson(item)
+                PreferenceManager.setDashboardData(context, json)
+            }
+
+            override fun shouldFetch(data: DashboardResponse?): Boolean {
+                return true
+            }
+
+            override fun createCall(): RetrofitCall<DashboardResponse> {
+                return service.getDashBoardData()
+            }
+        }.asLiveData()
+    }
+
+}

app/src/main/java/in/testpress/testpress/ui/MainActivity.java

@@ -66,7 +66,7 @@
 import in.testpress.testpress.models.InstituteSettingsDao;
 import in.testpress.testpress.models.SsoUrl;
 import in.testpress.testpress.models.Update;
-import in.testpress.testpress.ui.fragments.DashboardFragment;
+import in.testpress.testpress.ui.fragments.DashBoardFragment;
 import in.testpress.testpress.ui.fragments.DiscussionFragmentv2;
 import in.testpress.testpress.ui.utils.HandleMainMenu;
 import in.testpress.testpress.util.CommonUtils;
@@ -75,7 +75,6 @@
 import in.testpress.testpress.util.Strings;
 import in.testpress.testpress.util.UIUtils;
 import in.testpress.testpress.util.UpdateAppDialogManager;
-import in.testpress.ui.fragments.DiscussionFragment;
 import io.sentry.android.core.SentryAndroid;
 
 import static in.testpress.testpress.BuildConfig.ALLOW_ANONYMOUS_USER;
@@ -335,7 +334,7 @@ private void initScreen() {
         }
 
         if (isUserAuthenticated && mInstituteSettings.getShowGameFrontend()) {
-            addMenuItem(R.string.dashboard, R.drawable.ic_dashboard, new DashboardFragment());
+            addMenuItem(R.string.dashboard, R.drawable.ic_dashboard, new DashBoardFragment());
         } else {
             addMenuItem(R.string.dashboard, R.drawable.profile_default, new MainMenuFragment());
         }

app/src/main/java/in/testpress/testpress/ui/fragments/DashBoardFragment.kt

@@ -0,0 +1,200 @@
+package `in`.testpress.testpress.ui.fragments
+
+import `in`.testpress.enums.Status
+import `in`.testpress.network.Resource
+import `in`.testpress.testpress.BuildConfig
+import `in`.testpress.testpress.Injector
+import `in`.testpress.testpress.R
+import `in`.testpress.testpress.TestpressServiceProvider
+import `in`.testpress.testpress.models.pojo.DashboardResponse
+import `in`.testpress.testpress.models.pojo.DashboardSection
+import `in`.testpress.testpress.repository.DashBoardRepository
+import `in`.testpress.testpress.ui.adapters.DashboardAdapter
+import `in`.testpress.testpress.util.PreferenceManager
+import `in`.testpress.testpress.viewmodel.DashBoardViewModel
+import android.accounts.AccountManager
+import android.content.Context
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+import butterknife.ButterKnife
+import butterknife.InjectView
+import com.facebook.shimmer.ShimmerFrameLayout
+import io.sentry.Sentry
+import io.sentry.protocol.User
+import javax.inject.Inject
+
+class DashBoardFragment : Fragment() {
+
+    @InjectView(R.id.recycler_View)
+    lateinit var recyclerView: RecyclerView
+
+    @InjectView(R.id.empty_container)
+    lateinit var emptyView: LinearLayout
+
+    @InjectView(R.id.empty_title)
+    lateinit var emptyTitleView: TextView
+
+    @InjectView(R.id.empty_description)
+    lateinit var emptyDescView: TextView
+
+    @InjectView(R.id.retry_button)
+    lateinit var retryButton: Button
+
+    @InjectView(R.id.swipe_container)
+    lateinit var swipeRefreshLayout: SwipeRefreshLayout
+
+    @InjectView(R.id.shimmer_view_container)
+    lateinit var loadingPlaceholder: ShimmerFrameLayout
+
+    @Inject
+    lateinit var serviceProvider: TestpressServiceProvider
+    private lateinit var adapter: DashboardAdapter
+    lateinit var exception: Exception
+    lateinit var dashboardResponse: DashboardResponse
+    private lateinit var viewModel: DashBoardViewModel
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        Injector.inject(this)
+        super.onCreate(savedInstanceState)
+
+        initViewModel()
+        setUsernameInSentry()
+    }
+
+    private fun initViewModel() {
+        viewModel = ViewModelProvider(this, object : ViewModelProvider.Factory {
+            override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                return DashBoardViewModel(DashBoardRepository(requireContext())) as T
+            }
+        }).get(DashBoardViewModel::class.java)
+    }
+
+    private fun setUsernameInSentry() {
+        val manager = activity!!.getSystemService(Context.ACCOUNT_SERVICE) as AccountManager
+        val account = manager.getAccountsByType(BuildConfig.APPLICATION_ID)
+        if (account.isNotEmpty()) {
+            val user = User()
+            user.username = account[0].name
+            Sentry.setUser(user)
+        }
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        Injector.inject(this)
+        activity!!.invalidateOptionsMenu()
+        return inflater.inflate(R.layout.dashboard_view, null)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        ButterKnife.inject(this, view)
+
+        setRecycleViewAdapter()
+        showDataFromCacheIfAvailable()
+        addOnClickListeners()
+    }
+
+    private fun setRecycleViewAdapter() {
+        adapter = DashboardAdapter(context, DashboardResponse(), serviceProvider)
+        recyclerView.adapter = adapter
+        recyclerView.layoutManager = LinearLayoutManager(context)
+        swipeRefreshLayout.isEnabled = true
+    }
+
+    private fun showDataFromCacheIfAvailable() {
+        if (getSections().isNotEmpty()) {
+            adapter.setResponse(PreferenceManager.getDashboardDataPreferences(requireContext()))
+        } else {
+            loadData()
+        }
+    }
+
+    private fun getSections(): List<DashboardSection> {
+        return PreferenceManager.getDashboardDataPreferences(context).availableSections
+    }
+
+    private fun addOnClickListeners() {
+        swipeRefreshLayout.setOnRefreshListener {
+            swipeRefreshLayout.isEnabled = true
+            refresh()
+        }
+        retryButton.setOnClickListener {
+            swipeRefreshLayout.visibility = View.VISIBLE
+            swipeRefreshLayout.isRefreshing = true
+            emptyView.visibility = View.GONE
+            refresh()
+        }
+    }
+
+    fun refresh() {
+        if (activity != null) {
+            loadData()
+        }
+    }
+
+    private fun loadData() {
+        viewModel.loadData().observe(
+            viewLifecycleOwner,
+            Observer<Resource<DashboardResponse>> { dashBoard ->
+                showLoadingImage()
+                when (dashBoard.status) {
+                    Status.SUCCESS -> {
+                        swipeRefreshLayout.isRefreshing = false
+                        adapter.setResponse(dashBoard.data)
+                        hideShimmer()
+                    }
+                    Status.ERROR -> {
+                        hideShimmer()
+                        setEmptyText()
+                    }
+                    else -> {}
+                }
+            })
+    }
+
+    private fun showLoadingImage() {
+        loadingPlaceholder.visibility = View.VISIBLE
+        loadingPlaceholder.startShimmer()
+    }
+
+    private fun hideShimmer() {
+        loadingPlaceholder.stopShimmer()
+        loadingPlaceholder.visibility = View.GONE
+    }
+
+    private fun setEmptyText() {
+        setEmptyText(
+            R.string.no_data_available, R.string.try_after_some_time,
+            R.drawable.ic_error_outline_black_18dp
+        )
+    }
+
+    private fun setEmptyText(title: Int, description: Int, icon: Int) {
+        emptyView.visibility = View.VISIBLE
+        emptyTitleView.setText(title)
+        emptyTitleView.setCompoundDrawablesWithIntrinsicBounds(icon, 0, 0, 0)
+        emptyDescView.setText(description)
+        retryButton.visibility = View.VISIBLE
+    }
+
+    override fun onResume() {
+        super.onResume()
+        refresh()
+    }
+}