Implemented button to change dates for an event to reflect the academic quarter

app/src/main/java/com/denizk0461/studip/data/Misc.kt

@@ -1,7 +1,9 @@
 package com.denizk0461.studip.data
 
+import android.content.Context
 import android.content.res.Resources
 import android.util.TypedValue
+import android.widget.Toast
 import androidx.annotation.AttrRes
 import com.denizk0461.studip.R
 
@@ -30,24 +32,52 @@ fun Resources.Theme.getThemedColor(@AttrRes id: Int): Int = TypedValue().also {
     resolveAttribute(id, value, true)
 }.data
 
-object Misc {
+/**
+ * Present the user with a toast.
+ *
+ * @param text  text to display
+ */
+fun showToast(context: Context, text: String) {
+    Toast.makeText(context, text, Toast.LENGTH_SHORT).show()
+}
 
-//    private val timeslotAcademicQuarter = mapOf(
-//        "6:00" to "6:15",
-//        "8:00" to "7:45",
-//        "8:00" to "8:15",
-//        "10:00" to "9:45",
-//        "10:00" to "10:15",
-//        "12:00" to "11:45",
-//        "12:00" to "12:15",
-//        "14:00" to "13:45",
-//        "14:00" to "14:15",
-//        "16:00" to "15:45",
-//        "16:00" to "16:15",
-//        "18:00" to "17:45",
-//        "18:00" to "18:15",
-//        "20:00" to "19:45",
-//        "20:00" to "20:15",
-//        "22:00" to "21:45",
-//    )
-}
+/**
+ * Provides a conversion method between a timestamp ending in a full hour, and one with an academic
+ * quarter applied.
+ */
+val timeslotsAcademicQuarter = listOf(
+    "4:00",
+    "6:00",
+    "8:00",
+    "10:00",
+    "12:00",
+    "14:00",
+    "16:00",
+    "18:00",
+    "20:00",
+    "22:00",
+)
+
+val timeslotsAcademicQuarterStart = mapOf(
+    "4:00" to "4:15",
+    "6:00" to "6:15",
+    "8:00" to "8:15",
+    "10:00" to "10:15",
+    "12:00" to "12:15",
+    "14:00" to "14:15",
+    "16:00" to "16:15",
+    "18:00" to "18:15",
+    "20:00" to "20:15",
+)
+
+val timeslotsAcademicQuarterEnd = mapOf(
+    "6:00" to "5:45",
+    "8:00" to "7:45",
+    "10:00" to "9:45",
+    "12:00" to "11:45",
+    "14:00" to "13:45",
+    "16:00" to "15:45",
+    "18:00" to "17:45",
+    "20:00" to "19:45",
+    "22:00" to "21:45",
+)