Fix NPE in SyncSettings

app/src/main/kotlin/org/koitharu/kotatsu/settings/SyncSettingsFragment.kt

@@ -44,6 +44,6 @@ class SyncSettingsFragment : BasePreferenceFragment(R.string.sync_settings), Fra
 
 	private fun bindHostSummary() {
 		val preference = findPreference<Preference>(SyncSettings.KEY_SYNC_URL) ?: return
-		preference.summary = syncSettings.syncURL
+		preference.summary = syncSettings.syncUrl
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/sync/data/SyncAuthenticator.kt

@@ -32,7 +32,7 @@ class SyncAuthenticator(
 	private fun tryRefreshToken() = runCatching {
 		runBlocking {
 			authApi.authenticate(
-				syncSettings.syncURL,
+				syncSettings.syncUrl,
 				account.name,
 				accountManager.getPassword(account),
 			)

app/src/main/kotlin/org/koitharu/kotatsu/sync/data/SyncSettings.kt

@@ -27,13 +27,9 @@ class SyncSettings(
 
 	@get:WorkerThread
 	@set:WorkerThread
-	var syncURL: String
+	var syncUrl: String
 		get() = account?.let {
-			val result = accountManager.getUserData(it, KEY_SYNC_URL)
-			if (!result.startsWith("http://") && !result.startsWith("https://")) {
-				return "http://$result"
-			}
-			return result
+			accountManager.getUserData(it, KEY_SYNC_URL)?.withHttpSchema()
 		}.ifNullOrEmpty { defaultSyncUrl }
 		set(value) {
 			account?.let {
@@ -43,6 +39,12 @@ class SyncSettings(
 
 	companion object {
 
+		private fun String.withHttpSchema(): String = if (!startsWith("http://") && !startsWith("https://")) {
+			"http://$this"
+		} else {
+			this
+		}
+
 		const val KEY_SYNC_URL = "host"
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/sync/domain/SyncHelper.kt

@@ -59,7 +59,7 @@ class SyncHelper @AssistedInject constructor(
 		.addInterceptor(SyncInterceptor(context, account))
 		.build()
 	private val baseUrl: String by lazy {
-		settings.syncURL
+		settings.syncUrl
 	}
 	private val defaultGcPeriod: Long // gc period if sync enabled
 		get() = TimeUnit.DAYS.toMillis(4)

app/src/main/kotlin/org/koitharu/kotatsu/sync/ui/SyncHostDialogFragment.kt

@@ -52,7 +52,7 @@ class SyncHostDialogFragment : AlertDialogFragment<PreferenceDialogAutocompletet
 		binding.message.setText(R.string.sync_host_description)
 		val entries = binding.root.resources.getStringArray(R.array.sync_url_list)
 		val editText = binding.edit
-		editText.setText(arguments?.getString(KEY_SYNC_URL).ifNullOrEmpty { syncSettings.syncURL })
+		editText.setText(arguments?.getString(KEY_SYNC_URL).ifNullOrEmpty { syncSettings.syncUrl })
 		editText.threshold = 0
 		editText.setAdapter(ArrayAdapter(binding.root.context, android.R.layout.simple_spinner_dropdown_item, entries))
 		binding.dropdown.setOnClickListener {
@@ -69,7 +69,7 @@ class SyncHostDialogFragment : AlertDialogFragment<PreferenceDialogAutocompletet
 				if (!result.startsWith("https://") && !result.startsWith("http://")) {
 					scheme = "http://"
 				}
-				syncSettings.syncURL = "$scheme$result"
+				syncSettings.syncUrl = "$scheme$result"
 				parentFragmentManager.setFragmentResult(REQUEST_KEY, bundleOf(KEY_SYNC_URL to "$scheme$result"))
 			}
 		}