- MVVM refactor

- Kodein DI added
 - Overhaul dirty code in views
 - Bug fixes

app/src/main/java/com/appttude/h_mal/farmr/base/BaseActivity.kt

@@ -53,6 +53,6 @@ abstract class BaseActivity<V : BaseViewModel> : AppCompatActivity(), KodeinAwar
     }
 
     fun setTitleInActionBar(title: String) {
-        setTitle(title)
+        supportActionBar?.title = title
     }
 }

app/src/main/java/com/appttude/h_mal/farmr/data/legacydb/LegacyDatabase.kt

@@ -1,5 +1,6 @@
 package com.appttude.h_mal.farmr.data.legacydb
 
+import android.content.ContentResolver
 import android.content.ContentUris
 import android.content.ContentValues
 import android.content.Context
@@ -20,8 +21,7 @@ import com.appttude.h_mal.farmr.data.legacydb.ShiftsContract.ShiftsEntry._ID
 import com.appttude.h_mal.farmr.model.Shift
 import com.appttude.h_mal.farmr.model.ShiftType
 
-class LegacyDatabase(context: Context) {
-    private val resolver = context.contentResolver
+class LegacyDatabase(private val resolver: ContentResolver) {
 
     private val projection = arrayOf<String?>(
         _ID,
@@ -44,7 +44,7 @@ class LegacyDatabase(context: Context) {
         val values = ContentValues().apply {
             put(COLUMN_SHIFT_TYPE, shift.type.type)
             put(COLUMN_SHIFT_DESCRIPTION, shift.description)
-            put(COLUMN_SHIFT_DATE, shift.description)
+            put(COLUMN_SHIFT_DATE, shift.date)
             put(COLUMN_SHIFT_TIME_IN, shift.timeIn ?: "00:00")
             put(COLUMN_SHIFT_TIME_OUT, shift.timeOut ?: "00:00")
             put(COLUMN_SHIFT_DURATION, shift.duration ?: 0.00f)
@@ -63,8 +63,9 @@ class LegacyDatabase(context: Context) {
             projection,
             null, null, null
         ) ?: return null
-        cursor.moveToFirst()
-        val shifts = (0..cursor.count).map { cursor.getShift() }
+        val shifts = generateSequence { if (cursor.moveToNext()) cursor else null }
+            .map { it.getShift() }
+            .toList()
         // close cursor after query operations
         cursor.close()
 

app/src/main/java/com/appttude/h_mal/farmr/di/ShiftApplication.kt

@@ -19,7 +19,7 @@ class ShiftApplication: Application(), KodeinAware {
     override val kodein = Kodein.lazy {
         import(androidXModule(this@ShiftApplication))
 
-        bind() from singleton { LegacyDatabase(this@ShiftApplication) }
+        bind() from singleton { LegacyDatabase(contentResolver) }
         bind() from singleton { PreferenceProvider(this@ShiftApplication) }
         bind() from singleton { RepositoryImpl(instance(), instance()) }
 

app/src/main/java/com/appttude/h_mal/farmr/ui/FragmentAddItem.kt

@@ -51,11 +51,13 @@ class FragmentAddItem : BaseFragment<MainViewModel>(R.layout.fragment_add_item),
     private var mDescription: String? = null
     private var mTimeIn: String? = null
     private var mTimeOut: String? = null
-    private var mBreaks = 0
-    private var mUnits = 0f
+    private var mBreaks: Int? = null
+    private var mUnits: Float? = null
     private var mPayRate = 0f
     private var mType: ShiftType? = null
-    private var mDuration: Float = 0f
+    private var mDuration: Float? = null
+
+    private var id: Long? = null
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
@@ -97,7 +99,7 @@ class FragmentAddItem : BaseFragment<MainViewModel>(R.layout.fragment_add_item),
             calculateTotalPay()
         }
         mUnitEditText.doAfterTextChanged {
-            it.toString().toFloatOrNull()?.let { u -> mPayRate = u }
+            it.toString().toFloatOrNull()?.let { u -> mUnits = u }
             calculateTotalPay()
         }
         mPayRateEditText.doAfterTextChanged {
@@ -113,6 +115,8 @@ class FragmentAddItem : BaseFragment<MainViewModel>(R.layout.fragment_add_item),
     }
 
     private fun setupViewAfterViewCreated() {
+        id = arguments?.getLong(ID)
+
         val title = when (arguments?.containsKey(ID)) {
             true -> {
                 // Since we are editing a shift lets load the shift data into the views
@@ -158,6 +162,7 @@ class FragmentAddItem : BaseFragment<MainViewModel>(R.layout.fragment_add_item),
                 hourlyDataView.show()
                 durationHolder.show()
             }
+
             R.id.piecerate -> {
                 mType = ShiftType.PIECE
                 wholeView.show()
@@ -183,13 +188,48 @@ class FragmentAddItem : BaseFragment<MainViewModel>(R.layout.fragment_add_item),
         }
 
         if (mPieceRadioButton.isChecked) {
-            mUnits.validateField({!it.isNaN()}) {
+
+            mUnits.validateField({ it != null && it >= 0 }) {
                 onFailure("Units field cannot be empty")
                 return
             }
-            viewModel.insertPieceRateShift(mDescription!!, mDate!!, mUnits, mPayRate)
+            if (id != null) {
+                // update
+                viewModel.updateShift(
+                    id!!,
+                    description = mDescription,
+                    date = mDate,
+                    units = mUnits,
+                    rateOfPay = mPayRate
+                )
+            } else {
+                // insert
+                viewModel.insertPieceRateShift(mDescription!!, mDate!!, mUnits!!, mPayRate)
+            }
         } else if (mHourlyRadioButton.isChecked) {
-            viewModel.insertHourlyShift(mDescription!!, mDate!!, mPayRate, mTimeIn, mTimeOut, mBreaks)
+            if (id != null) {
+                // update
+                viewModel.updateShift(
+                    id!!,
+                    description = mDescription,
+                    date = mDate,
+                    rateOfPay = mPayRate,
+                    timeIn = mTimeIn,
+                    timeOut = mTimeOut,
+                    breakMins = mBreaks
+                )
+            } else {
+                // insert
+                viewModel.insertHourlyShift(
+                    mDescription!!,
+                    mDate!!,
+                    mPayRate,
+                    mTimeIn,
+                    mTimeOut,
+                    mBreaks
+                )
+            }
+
         }
     }
 
@@ -199,11 +239,13 @@ class FragmentAddItem : BaseFragment<MainViewModel>(R.layout.fragment_add_item),
                 ShiftType.HOURLY -> {
                     // Calculate duration before total pay calculation
                     mDuration = viewModel.retrieveDurationText(mTimeIn, mTimeOut, mBreaks) ?: return
-                    mDurationTextView.text = StringBuilder().append(mDuration).append(" hours").toString()
-                    mDuration * mPayRate
+                    mDurationTextView.text =
+                        StringBuilder().append(mDuration).append(" hours").toString()
+                    mDuration!! * mPayRate
                 }
+
                 ShiftType.PIECE -> {
-                    mUnits * mPayRate
+                    (mUnits ?: 0f) * mPayRate
                 }
             }
             mTotalPayTextView.text = total.formatToTwoDpString()

app/src/main/java/com/appttude/h_mal/farmr/ui/FragmentMain.kt

@@ -27,7 +27,7 @@ import kotlin.system.exitProcess
 class FragmentMain : BaseFragment<MainViewModel>(R.layout.fragment_main), BackPressedListener {
     lateinit var activity: MainActivity
     private lateinit var productListView: RecyclerView
-    private lateinit var mAdapter: ShiftRecyclerAdapter
+    private lateinit var mAdapter: ShiftListAdapter
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -38,7 +38,7 @@ class FragmentMain : BaseFragment<MainViewModel>(R.layout.fragment_main), BackPr
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
-        mAdapter = ShiftRecyclerAdapter(this) {
+        mAdapter = ShiftListAdapter(this) {
             viewModel.deleteShift(it)
         }
         productListView = view.findViewById(R.id.list_item_view)
@@ -49,10 +49,16 @@ class FragmentMain : BaseFragment<MainViewModel>(R.layout.fragment_main), BackPr
         }
     }
 
+    override fun onStart() {
+        super.onStart()
+
+        viewModel.refreshLiveData()
+    }
+
     override fun onSuccess(data: Any?) {
         super.onSuccess(data)
         if (data is List<*>) {
-            mAdapter.updateData(data as List<ShiftObject>)
+            mAdapter.submitList(data as List<ShiftObject>)
         }
     }
 

app/src/main/java/com/appttude/h_mal/farmr/ui/MainActivity.kt

@@ -22,10 +22,6 @@ import kotlin.system.exitProcess
 class MainActivity : BaseActivity<MainViewModel>() {
     private lateinit var toolbar: Toolbar
 
-    var selection: String? = null
-    var args: Array<String>? = null
-
-
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.main_view)
@@ -57,11 +53,6 @@ class MainActivity : BaseActivity<MainViewModel>() {
         }
     }
 
-
-    fun setActionBarTitle(title: String?) {
-        toolbar.title = title
-    }
-
     // Storage Permissions
     private val REQUEST_EXTERNAL_STORAGE = 1
     private val PERMISSIONS_STORAGE = arrayOf(

app/src/main/java/com/appttude/h_mal/farmr/ui/ShiftListAdapter.kt

@@ -2,26 +2,36 @@ package com.appttude.h_mal.farmr.ui
 
 import android.app.AlertDialog
 import android.os.Bundle
-import android.view.View
+import android.view.ViewGroup
 import android.widget.ImageView
 import android.widget.TextView
 import androidx.fragment.app.Fragment
-import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
 import com.appttude.h_mal.farmr.R
 import com.appttude.h_mal.farmr.base.BaseRecyclerAdapter
 import com.appttude.h_mal.farmr.data.legacydb.ShiftObject
 import com.appttude.h_mal.farmr.model.ShiftType
 import com.appttude.h_mal.farmr.utils.ID
+import com.appttude.h_mal.farmr.utils.generateView
 import com.appttude.h_mal.farmr.utils.navigateToFragment
 
-class ShiftRecyclerAdapter(
+class ShiftListAdapter(
     private val fragment: Fragment,
     private val longPressCallback: (Long) -> Unit
-) : BaseRecyclerAdapter<ShiftObject>(
-    emptyViewId = R.layout.empty_list_view,
-    currentViewId = R.layout.list_item_1
-) {
-    override fun bindCurrentView(view: View, position: Int, data: ShiftObject) {
+) : ListAdapter<ShiftObject, BaseRecyclerAdapter.CurrentViewHolder>(diffCallBack) {
+    override fun onCreateViewHolder(
+        parent: ViewGroup,
+        viewType: Int
+    ): BaseRecyclerAdapter.CurrentViewHolder {
+        val currentViewHolder = parent.generateView(R.layout.list_item_1)
+        return BaseRecyclerAdapter.CurrentViewHolder(currentViewHolder)
+    }
+
+    override fun onBindViewHolder(holder: BaseRecyclerAdapter.CurrentViewHolder, position: Int) {
+        val view = holder.itemView
+        val data = getItem(position)
+
         val descriptionTextView: TextView = view.findViewById(R.id.location)
         val dateTextView: TextView = view.findViewById(R.id.date)
         val totalPay: TextView = view.findViewById(R.id.total_pay)
@@ -89,16 +99,15 @@ class ShiftRecyclerAdapter(
         }
     }
 
-//    override fun getItemId(position: Int): Long {
-//        return if (list.isNullOrEmpty()) {
-//            RecyclerView.NO_ID
-//        } else {
-//            list!![position].id
-//        }
-//
-//    }
-//
-//    override fun setHasStableIds(hasStableIds: Boolean) {
-//        super.setHasStableIds(true)
-//    }
+    companion object {
+        val diffCallBack = object : DiffUtil.ItemCallback<ShiftObject>() {
+            override fun areItemsTheSame(oldItem: ShiftObject, newItem: ShiftObject): Boolean {
+                return oldItem.id == newItem.id
+            }
+
+            override fun areContentsTheSame(oldItem: ShiftObject, newItem: ShiftObject): Boolean {
+                return oldItem == newItem
+            }
+        }
+    }
 }

app/src/main/java/com/appttude/h_mal/farmr/utils/Formatting.kt

@@ -20,11 +20,11 @@ fun Float.formatToTwoDpString(): String {
 }
 
 fun String.dateStringIsValid(): Boolean {
-    return DATE_FORMAT.toPattern().matcher(this).matches()
+    return "([0-9]{4})-([0-9]{2})-([0-9]{2})".toPattern().matcher(this).matches()
 }
 
 fun String.timeStringIsValid(): Boolean {
-    return TIME_FORMAT.toPattern().matcher(this).matches()
+    return "^([0-1]?[0-9]|2[0-3]):[0-5][0-9]\$".toPattern().matcher(this).matches()
 }
 
 fun Calendar.getTimeString(): String {

app/src/main/java/com/appttude/h_mal/farmr/utils/ViewUtils.kt

@@ -173,5 +173,7 @@ fun EditText.setDatePicker(onSelected: (String) -> Unit) {
         }, mYear, mMonth, mDay
     )
     mDatePicker.setTitle("Select date")
+    setOnClickListener {
         mDatePicker.show()
     }
+}

app/src/main/java/com/appttude/h_mal/farmr/viewmodel/MainViewModel.kt

@@ -160,7 +160,7 @@ class MainViewModel(
         rateOfPay: Float
     ) {
         // Validate inputs from the edit texts
-        (description.length < 3).validateField {
+        (description.length > 3).validateField {
             onError("Description length should be longer")
             return
         }
@@ -196,11 +196,11 @@ class MainViewModel(
         type: String? = null,
         description: String? = null,
         date: String? = null,
-        rateOfPay: String? = null,
+        rateOfPay: Float? = null,
         timeIn: String? = null,
         timeOut: String? = null,
-        breakMins: String? = null,
-        units: String? = null,
+        breakMins: Int? = null,
+        units: Float? = null,
     ) {
         description?.let {
             (it.length < 3).validateField {
@@ -243,11 +243,11 @@ class MainViewModel(
                 type = type?.let { ShiftType.getEnumByType(it) },
                 description = description,
                 date = date,
-                rateOfPay = rateOfPay?.toFloatOrNull(),
+                rateOfPay = rateOfPay,
                 timeIn = timeIn,
                 timeOut = timeOut,
-                breakMins = breakMins?.toIntOrNull(),
-                units = units?.toFloatOrNull()
+                breakMins = breakMins,
+                units = units
             )
         }
     }
@@ -430,7 +430,7 @@ class MainViewModel(
         return textString
     }
 
-    private fun refreshLiveData() {
+    fun refreshLiveData() {
         _shiftLiveData.postValue(repository.readShiftsFromDatabase())
     }
 
@@ -471,7 +471,7 @@ class MainViewModel(
         return mFilterStore!!
     }
 
-    fun retrieveDurationText(mTimeIn: String?, mTimeOut: String?, mBreaks: Int): Float? {
+    fun retrieveDurationText(mTimeIn: String?, mTimeOut: String?, mBreaks: Int?): Float? {
         try {
             return calculateDuration(mTimeIn,mTimeOut,mBreaks)
         }catch (e: IOException) {