feat: migrated help fragment to mvvm

app/src/main/java/org/mifos/mobile/ui/fragments/HelpFragment.kt

@@ -13,37 +13,37 @@ import android.view.View
 import android.view.ViewGroup
 import android.widget.Toast
 import androidx.appcompat.widget.SearchView
+import androidx.lifecycle.ViewModelProvider
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.github.therajanmaurya.sweeterror.SweetUIErrorHandler
 import dagger.hilt.android.AndroidEntryPoint
 import org.mifos.mobile.R
 import org.mifos.mobile.databinding.FragmentHelpBinding
 import org.mifos.mobile.models.FAQ
-import org.mifos.mobile.presenters.HelpPresenter
 import org.mifos.mobile.ui.activities.base.BaseActivity
 import org.mifos.mobile.ui.adapters.FAQAdapter
 import org.mifos.mobile.ui.fragments.base.BaseFragment
-import org.mifos.mobile.ui.views.HelpView
 import org.mifos.mobile.utils.Constants
 import org.mifos.mobile.utils.DividerItemDecoration
+import org.mifos.mobile.utils.HelpUiState
+import org.mifos.mobile.viewModels.HelpViewModel
 import javax.inject.Inject
 
 /*
 ~This project is licensed under the open source MPL V2.
 ~See https://github.com/openMF/self-service-app/blob/master/LICENSE.md
 */
 @AndroidEntryPoint
-class HelpFragment : BaseFragment(), HelpView {
+class HelpFragment : BaseFragment() {
     private var _binding: FragmentHelpBinding? = null
     private val binding get() = _binding!!
 
     @JvmField
     @Inject
     var faqAdapter: FAQAdapter? = null
 
-    @JvmField
-    @Inject
-    var presenter: HelpPresenter? = null
+    private lateinit var viewModel: HelpViewModel
+
     private var faqArrayList: ArrayList<FAQ?>? = null
     private lateinit var sweetUIErrorHandler: SweetUIErrorHandler
 
@@ -53,18 +53,32 @@ class HelpFragment : BaseFragment(), HelpView {
         savedInstanceState: Bundle?,
     ): View {
         _binding = FragmentHelpBinding.inflate(inflater, container, false)
+        viewModel = ViewModelProvider(this)[HelpViewModel::class.java]
         val rootView = binding.root
         setHasOptionsMenu(true)
-        presenter?.attachView(this)
         setToolbarTitle(getString(R.string.help))
         sweetUIErrorHandler = SweetUIErrorHandler(activity, rootView)
         showUserInterface()
         if (savedInstanceState == null) {
-            presenter?.loadFaq()
+            viewModel.loadFaq(
+                context?.resources?.getStringArray(R.array.faq_qs),
+                context?.resources?.getStringArray(R.array.faq_ans)
+            )
         }
         return rootView
     }
 
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        viewModel.helpUiState.observe(viewLifecycleOwner) {
+            when (it) {
+                is HelpUiState.ShowFaq -> {
+                    showFaq(it.faqArrayList)
+                }
+            }
+        }
+    }
+
     override fun onSaveInstanceState(outState: Bundle) {
         super.onSaveInstanceState(outState)
         outState.putParcelableArrayList(Constants.HELP, ArrayList<Parcelable?>(faqArrayList))
@@ -119,7 +133,7 @@ class HelpFragment : BaseFragment(), HelpView {
         }
     }
 
-    override fun showFaq(faqArrayList: ArrayList<FAQ?>?) {
+    fun showFaq(faqArrayList: ArrayList<FAQ?>?) {
         faqAdapter?.setFaqArrayList(faqArrayList)
         binding.rvFaq.adapter = faqAdapter
         this.faqArrayList = faqArrayList
@@ -136,8 +150,8 @@ class HelpFragment : BaseFragment(), HelpView {
             }
 
             override fun onQueryTextChange(newText: String): Boolean {
-                val filteredFAQList = presenter?.filterList(faqArrayList, newText)
-                filteredFAQList?.let {
+                val filteredFAQList = viewModel.filterList(faqArrayList, newText)
+                filteredFAQList.let {
                     if (it.isNotEmpty()) {
                         sweetUIErrorHandler.hideSweetErrorLayoutUI(
                             binding.rvFaq,
@@ -162,11 +176,11 @@ class HelpFragment : BaseFragment(), HelpView {
         )
     }
 
-    override fun showProgress() {
+    fun showProgress() {
         showProgressBar()
     }
 
-    override fun hideProgress() {
+    fun hideProgress() {
         hideProgressBar()
     }
 

app/src/main/java/org/mifos/mobile/utils/HelpUiState.kt

@@ -0,0 +1,7 @@
+package org.mifos.mobile.utils
+
+import org.mifos.mobile.models.FAQ
+
+sealed class HelpUiState {
+    data class ShowFaq(val faqArrayList: ArrayList<FAQ?>) : HelpUiState()
+}

app/src/main/java/org/mifos/mobile/viewModels/HelpViewModel.kt

@@ -0,0 +1,42 @@
+package org.mifos.mobile.viewModels
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import dagger.hilt.android.lifecycle.HiltViewModel
+import org.mifos.mobile.models.FAQ
+import org.mifos.mobile.utils.HelpUiState
+import java.util.*
+import javax.inject.Inject
+import kotlin.collections.ArrayList
+
+@HiltViewModel
+class HelpViewModel @Inject constructor() : ViewModel() {
+
+    private val _helpUiState = MutableLiveData<HelpUiState>()
+    val helpUiState: LiveData<HelpUiState> get() = _helpUiState
+
+    fun loadFaq(qs: Array<String>?, ans: Array<String>?) {
+        val faqArrayList = ArrayList<FAQ?>()
+        if (qs != null) {
+            for (i in qs.indices) {
+                faqArrayList.add(FAQ(qs[i], ans?.get(i)))
+            }
+        }
+        _helpUiState.value = HelpUiState.ShowFaq(faqArrayList)
+    }
+
+    fun filterList(faqArrayList: ArrayList<FAQ?>?, query: String): ArrayList<FAQ?> {
+        val filteredList = ArrayList<FAQ?>()
+        if (faqArrayList != null) {
+            for (faq in faqArrayList) {
+                if (faq?.question?.lowercase(Locale.ROOT)
+                        ?.contains(query.lowercase(Locale.ROOT)) == true
+                ) {
+                    filteredList.add(faq)
+                }
+            }
+        }
+        return filteredList
+    }
+}