Made further documentation and safety changes. Scraper classes (StudIPParser.kt, StwParser.kt) still need to be checked for safety.

app/src/main/java/com/denizk0461/studip/sheet/AppSheet.kt

@@ -19,7 +19,9 @@ open class AppSheet(@LayoutRes private val layoutId: Int) : BottomSheetDialogFra
     // Internal context object
     private lateinit var _context: Context
 
-    // Get non-null context. Only valid after onAttach()
+    /**
+     * Get non-null context. Only valid after onAttach().
+     */
     override fun getContext(): Context = _context
 
     override fun onAttach(context: Context) {
@@ -27,7 +29,6 @@ open class AppSheet(@LayoutRes private val layoutId: Int) : BottomSheetDialogFra
         _context = context
     }
 
-    // Inflate the given layout
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View =
         LayoutInflater.from(context).inflate(layoutId, container, false)
 }

app/src/main/java/com/denizk0461/studip/sheet/ScheduleUpdateSheet.kt

@@ -6,14 +6,15 @@ import android.view.ViewGroup
 import androidx.fragment.app.FragmentActivity
 import androidx.transition.TransitionManager
 import com.denizk0461.studip.R
+import com.denizk0461.studip.data.getTimestampAcademicQuarterEnd
+import com.denizk0461.studip.data.getTimestampAcademicQuarterStart
 import com.denizk0461.studip.data.parseToMinutes
 import com.denizk0461.studip.data.showToast
 import com.denizk0461.studip.data.timeslotsAcademicQuarter
-import com.denizk0461.studip.data.timeslotsAcademicQuarterEnd
-import com.denizk0461.studip.data.timeslotsAcademicQuarterStart
 import com.denizk0461.studip.data.viewBinding
 import com.denizk0461.studip.databinding.SheetScheduleUpdateBinding
 import com.denizk0461.studip.dialog.TimePickerFragment
+import com.denizk0461.studip.exception.AcademicQuarterNotApplicableException
 import com.denizk0461.studip.model.StudIPEvent
 
 /**
@@ -60,10 +61,8 @@ class ScheduleUpdateSheet(
             binding.buttonAcademicQuarter.setOnClickListener {
                 try {
                     // Retrieve new timestamps with the academic quarter applied, or throw a tantrum
-                    val newStart = timeslotsAcademicQuarterStart[timeslotStart]
-                        ?: throw NullPointerException()
-                    val newEnd = timeslotsAcademicQuarterEnd[timeslotEnd]
-                        ?: throw NullPointerException()
+                    val newStart = getTimestampAcademicQuarterStart(timeslotStart)
+                    val newEnd = getTimestampAcademicQuarterEnd(timeslotEnd)
 
                     // Set the buttons to the new timesatmps
                     timeslotStart = newStart
@@ -79,7 +78,7 @@ class ScheduleUpdateSheet(
                     binding.buttonAcademicQuarter.visibility = View.GONE
 
                 // Catch if a timeslot couldn't be found in the list, and tell the user
-                } catch (e: NullPointerException) {
+                } catch (e: AcademicQuarterNotApplicableException) {
                     showToast(context, getString(R.string.sheet_schedule_update_hint_quarter_error))
                 }
             }

app/src/main/java/com/denizk0461/studip/sheet/TextSheet.kt

@@ -2,7 +2,6 @@ package com.denizk0461.studip.sheet
 
 import android.os.Bundle
 import android.view.View
-import androidx.annotation.StringRes
 import com.denizk0461.studip.R
 import com.denizk0461.studip.data.viewBinding
 import com.denizk0461.studip.databinding.SheetTextBinding