(Calendar) Check for conflicting setup data #20

Author: maxkeppeler

app/src/main/java/com/mk/sheets/compose/samples/CalendarSample3.kt

@@ -35,14 +35,14 @@ import java.time.LocalDate
 internal fun CalendarSample3(closeSelection: SheetState.() -> Unit) {
 
     val selectedDateRange = remember {
-        val value = Range(LocalDate.now().minusDays(5), LocalDate.now())
+        val value = Range(LocalDate.now().minusDays(20), LocalDate.now().minusDays(10))
         mutableStateOf(value)
     }
 
     CalendarDialog(
         state = rememberSheetState(visible = true, true, onCloseRequest = closeSelection),
         config = CalendarConfig(
-            disabledTimeline = CalendarTimeline.PAST,
+            disabledTimeline = CalendarTimeline.FUTURE,
             style = CalendarStyle.MONTH,
         ),
         selection = CalendarSelection.Period(

calendar/src/main/java/com/maxkeppeler/sheets/calendar/CalendarState.kt

@@ -50,6 +50,37 @@ internal class CalendarState(
     var calendarData by mutableStateOf(getInitCalendarData())
     var valid by mutableStateOf(isValid())
 
+    init {
+        checkSetup()
+    }
+
+    private fun checkSetup() {
+        val selection = mutableListOf<LocalDate>()
+        when (this.selection) {
+            is CalendarSelection.Date -> date.value?.let { selection.add(it) }
+            is CalendarSelection.Dates -> selection.addAll(dates)
+            is CalendarSelection.Period -> {
+                range.startValue?.let { selection.add(it) }
+                range.endValue?.let { selection.add(it) }
+            }
+        }
+        val overlapDate = selection.firstOrNull { config.disabledDates?.contains(it) == true }
+        overlapDate?.let { throw IllegalStateException("Please correct your setup. Your selection overlaps with a provided disabled date. $it") }
+
+        val today = LocalDate.now()
+        when (config.disabledTimeline) {
+            CalendarTimeline.PAST -> {
+                val overlapTimelineDate = selection.firstOrNull { it.isBefore(today) }
+                overlapTimelineDate?.let { throw IllegalStateException("Please correct your setup. Your selection overlaps with the disabled timeline. ${config.disabledTimeline}") }
+            }
+            CalendarTimeline.FUTURE -> {
+                val overlapTimelineDate = selection.firstOrNull { it.isAfter(today) }
+                overlapTimelineDate?.let { throw IllegalStateException("Please correct your setup. Your selection overlaps with the disabled timeline. ${config.disabledTimeline}") }
+            }
+            null -> Unit
+        }
+    }
+
     private fun getInitYearsRange(): IntRange =
         IntRange(config.minYear, config.maxYear.plus(1))