config: unique selection value

app/src/main/kotlin/me/rhunk/snapenhance/config/ConfigAccessor.kt

@@ -44,6 +44,10 @@ open class ConfigAccessor(
         return get(key).value() as Map<String, Boolean>
     }
 
+    fun state(key: ConfigProperty): String {
+        return get(key).value() as String
+    }
+
     fun get(key: ConfigProperty): ConfigValue<*> {
         return configMap[key]!!
     }

app/src/main/kotlin/me/rhunk/snapenhance/config/impl/ConfigStateSelection.kt

@@ -0,0 +1,28 @@
+package me.rhunk.snapenhance.config.impl
+
+import me.rhunk.snapenhance.config.ConfigValue
+
+class ConfigStateSelection(
+    private val keys: List<String>,
+    var state: String = ""
+) : ConfigValue<String>() {
+
+    fun keys(): List<String> {
+        return keys
+    }
+    override fun value(): String {
+        return state
+    }
+
+    fun value(key: String) {
+        state = key
+    }
+
+    override fun write(): String {
+        return state
+    }
+
+    override fun read(value: String) {
+        state = value
+    }
+}

app/src/main/kotlin/me/rhunk/snapenhance/features/impl/ui/menus/impl/SettingsMenu.kt

@@ -13,6 +13,7 @@ import me.rhunk.snapenhance.Constants
 import me.rhunk.snapenhance.config.ConfigProperty
 import me.rhunk.snapenhance.config.impl.ConfigIntegerValue
 import me.rhunk.snapenhance.config.impl.ConfigStateListValue
+import me.rhunk.snapenhance.config.impl.ConfigStateSelection
 import me.rhunk.snapenhance.config.impl.ConfigStateValue
 import me.rhunk.snapenhance.config.impl.ConfigStringValue
 import me.rhunk.snapenhance.features.impl.ui.menus.AbstractMenu
@@ -89,6 +90,30 @@ class SettingsMenu : AbstractMenu() {
                 ViewAppearanceHelper.applyTheme(viewModel, switch)
                 switch
             }
+            is ConfigStateSelection -> {
+                val button = Button(viewModel.context)
+                updateButtonText(button, property.valueContainer.value())
+
+                button.setOnClickListener {_ ->
+                    val builder = AlertDialog.Builder(viewModel.context)
+                    builder.setTitle(context.translation.get(property.nameKey))
+
+                    builder.setSingleChoiceItems(
+                        property.valueContainer.keys().toTypedArray(),
+                        property.valueContainer.keys().indexOf(property.valueContainer.value())
+                    ) { _, which ->
+                        property.valueContainer.value(property.valueContainer.keys()[which])
+                    }
+
+                    builder.setPositiveButton("OK") { _, _ ->
+                        updateButtonText(button, property.valueContainer.value())
+                    }
+
+                    builder.show()
+                }
+                ViewAppearanceHelper.applyTheme(viewModel, button)
+                button
+            }
             is ConfigStateListValue -> {
                 val button = Button(viewModel.context)
                 updateButtonText(button, property.valueContainer.toString())