Add SavedStateHandle.getLongOrNull() helper

Author: lukstbit

AnkiDroid/src/main/java/com/ichi2/anki/ui/windows/reviewer/ReviewerViewModel.kt

@@ -64,6 +64,7 @@ import com.ichi2.anki.utils.CollectionPreferences
 import com.ichi2.anki.utils.Destination
 import com.ichi2.anki.utils.ext.answerCard
 import com.ichi2.anki.utils.ext.flag
+import com.ichi2.anki.utils.ext.getLongOrNull
 import com.ichi2.anki.utils.ext.setUserFlagForCards
 import kotlinx.coroutines.CompletableDeferred
 import kotlinx.coroutines.Deferred

AnkiDroid/src/main/java/com/ichi2/anki/utils/ext/SavedStateHandle.kt

@@ -21,3 +21,16 @@ fun <T> SavedStateHandle.require(key: String): T =
     checkNotNull(get(key)) {
         "Wrong type or key '$key' not found"
     }
+
+/**
+ * Retrieves the [Long] value for the provided [key], returns null if not found.
+ *
+ * @param key the key to use
+ * @return the long value, or null if not found
+ */
+fun SavedStateHandle.getLongOrNull(key: String): Long? =
+    if (contains(key)) {
+        get(key) as Long?
+    } else {
+        null
+    }