Merge branch 'master' into devel

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

@@ -0,0 +1,27 @@
+package org.koitharu.kotatsu.settings
+
+import okhttp3.Headers
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.network.CommonHeaders
+import org.koitharu.kotatsu.core.util.EditTextValidator
+
+class HeaderValidator : EditTextValidator() {
+
+	private val headers = Headers.Builder()
+
+	override fun validate(text: String): ValidationResult {
+		val trimmed = text.trim()
+		if (trimmed.isEmpty()) {
+			return ValidationResult.Success
+		}
+		return if (!validateImpl(trimmed)) {
+			ValidationResult.Failed(context.getString(R.string.invalid_value_message))
+		} else {
+			ValidationResult.Success
+		}
+	}
+
+	private fun validateImpl(value: String): Boolean = runCatching {
+		headers[CommonHeaders.USER_AGENT] = value
+	}.isSuccess
+}

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

@@ -44,7 +44,7 @@ fun PreferenceFragmentCompat.addPreferencesFromRepository(repository: RemoteMang
 						EditTextBindListener(
 							inputType = EditorInfo.TYPE_CLASS_TEXT,
 							hint = key.defaultValue,
-							validator = null,
+							validator = HeaderValidator(),
 						),
 					)
 					setTitle(R.string.user_agent)

app/src/main/res/values/strings.xml

@@ -423,4 +423,5 @@
 	<string name="address">Address</string>
 	<string name="port">Port</string>
 	<string name="proxy">Proxy</string>
+	<string name="invalid_value_message">Invalid value</string>
 </resources>