Avoid re-loading fragments on the current week/day (#191)

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceFragment.kt

@@ -71,6 +71,10 @@ class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildVie
         attendanceAdapter.clear()
     }
 
+    override fun resetView() {
+        attendanceAdapter.smoothScrollToPosition(0)
+    }
+
     override fun onFragmentReselected() {
         presenter.onViewReselected()
     }

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendancePresenter.kt

@@ -56,8 +56,12 @@ class AttendancePresenter @Inject constructor(
     }
 
     fun onViewReselected() {
-        loadData(now().previousOrSameSchoolDay)
+        now().previousOrSameSchoolDay.also {
+            if (currentDate != it) {
+                loadData(it)
                 reloadView()
+            } else view?.resetView()
+        }
     }
 
     fun onAttendanceItemSelected(item: AbstractFlexibleItem<*>?) {

app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceView.kt

@@ -17,6 +17,8 @@ interface AttendanceView : BaseView {
 
     fun hideRefresh()
 
+    fun resetView()
+
     fun showEmpty(show: Boolean)
 
     fun showProgress(show: Boolean)

app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamFragment.kt

@@ -77,6 +77,10 @@ class ExamFragment : BaseFragment(), ExamView, MainView.MainChildView, MainView.
         examAdapter.clear()
     }
 
+    override fun resetView() {
+        examAdapter.smoothScrollToPosition(0)
+    }
+
     override fun onFragmentReselected() {
         presenter.onViewReselected()
     }

app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamPresenter.kt

@@ -59,8 +59,13 @@ class ExamPresenter @Inject constructor(
     }
 
     fun onViewReselected() {
-        loadData(now().nextOrSameSchoolDay)
+        now().nextOrSameSchoolDay.also {
+            if (currentDate != it) {
+                loadData(it)
                 reloadView()
+                view?.resetView()
+            } else view?.resetView()
+        }
     }
 
     private fun loadData(date: LocalDate, forceRefresh: Boolean = false) {

app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamView.kt

@@ -17,6 +17,8 @@ interface ExamView : BaseView {
 
     fun hideRefresh()
 
+    fun resetView()
+
     fun showEmpty(show: Boolean)
 
     fun showProgress(show: Boolean)

app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableFragment.kt

@@ -35,6 +35,9 @@ class TimetableFragment : BaseFragment(), TimetableView, MainView.MainChildView,
     override val roomString: String
         get() = getString(R.string.timetable_room)
 
+    override val isViewEmpty: Boolean
+        get() = timetableAdapter.isEmpty
+
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         return inflater.inflate(R.layout.fragment_timetable, container, false)
     }
@@ -71,12 +74,14 @@ class TimetableFragment : BaseFragment(), TimetableView, MainView.MainChildView,
         timetableNavDate.text = date
     }
 
-    override fun isViewEmpty() = timetableAdapter.isEmpty
-
     override fun hideRefresh() {
         timetableSwipe.isRefreshing = false
     }
 
+    override fun resetView() {
+        timetableAdapter.smoothScrollToPosition(0)
+    }
+
     override fun onFragmentReselected() {
         presenter.onViewReselected()
     }

app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetablePresenter.kt

@@ -54,8 +54,12 @@ class TimetablePresenter @Inject constructor(
     }
 
     fun onViewReselected() {
-        loadData(now().nextOrSameSchoolDay)
+        now().nextOrSameSchoolDay.also {
+            if (currentDate != it) {
+                loadData(it)
                 reloadView()
+            } else view?.resetView()
+        }
     }
 
     fun onTimetableItemSelected(item: AbstractFlexibleItem<*>?) {
@@ -88,7 +92,7 @@ class TimetablePresenter @Inject constructor(
                     }
                     logEvent("Timetable load", mapOf("items" to it.size, "forceRefresh" to forceRefresh, "date" to currentDate.toFormattedString()))
                 }) {
-                    view?.run { showEmpty(isViewEmpty()) }
+                    view?.run { showEmpty(isViewEmpty) }
                     errorHandler.dispatch(it)
                 })
         }

app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableView.kt

@@ -7,18 +7,20 @@ interface TimetableView : BaseView {
 
     val roomString: String
 
+    val isViewEmpty: Boolean
+
     fun initView()
 
     fun updateData(data: List<TimetableItem>)
 
     fun updateNavigationDay(date: String)
 
-    fun isViewEmpty(): Boolean
-
     fun clearData()
 
     fun hideRefresh()
 
+    fun resetView()
+
     fun showEmpty(show: Boolean)
 
     fun showProgress(show: Boolean)