Make PreferenceModel an interface

app/src/main/java/com/topjohnwu/magisk/KConfig.kt

@@ -6,10 +6,9 @@ import com.topjohnwu.magisk.di.Protected
 import com.topjohnwu.magisk.model.preference.PreferenceModel
 import com.topjohnwu.magisk.utils.inject
 
-object KConfig : PreferenceModel() {
+object KConfig : PreferenceModel {
 
     override val context: Context by inject(Protected)
-    override val fileName: String = "${context.packageName}_preferences"
 
     private var internalUpdateChannel by preference(Config.Key.UPDATE_CHANNEL, STABLE.id.toString())
     var useCustomTabs by preference("useCustomTabs", true)

app/src/main/java/com/topjohnwu/magisk/model/preference/BooleanProperty.kt

@@ -16,7 +16,7 @@ class BooleanProperty(
         property: KProperty<*>
     ): Boolean {
         val prefName = name.trimEmptyToNull() ?: property.name
-        return runCatching { thisRef.prefs.get(prefName, default) }.getOrNull() ?: default
+        return thisRef.prefs.get(prefName, default)
     }
 
     override operator fun setValue(

app/src/main/java/com/topjohnwu/magisk/model/preference/FloatProperty.kt

@@ -16,7 +16,7 @@ class FloatProperty(
         property: KProperty<*>
     ): Float {
         val prefName = name.trimEmptyToNull() ?: property.name
-        return runCatching { thisRef.prefs.get(prefName, default) }.getOrNull() ?: default
+        return thisRef.prefs.get(prefName, default)
     }
 
     override operator fun setValue(

app/src/main/java/com/topjohnwu/magisk/model/preference/IntProperty.kt

@@ -16,7 +16,7 @@ class IntProperty(
         property: KProperty<*>
     ): Int {
         val prefName = name.trimEmptyToNull() ?: property.name
-        return runCatching { thisRef.prefs.get(prefName, default) }.getOrNull() ?: default
+        return thisRef.prefs.get(prefName, default)
     }
 
     override operator fun setValue(

app/src/main/java/com/topjohnwu/magisk/model/preference/LongProperty.kt

@@ -16,7 +16,7 @@ class LongProperty(
         property: KProperty<*>
     ): Long {
         val prefName = name.trimEmptyToNull() ?: property.name
-        return runCatching { thisRef.prefs.get(prefName, default) }.getOrNull() ?: default
+        return thisRef.prefs.get(prefName, default)
     }
 
     override operator fun setValue(

app/src/main/java/com/topjohnwu/magisk/model/preference/PreferenceModel.kt

@@ -1,51 +1,53 @@
 package com.topjohnwu.magisk.model.preference
 
 import android.content.Context
-import kotlin.properties.ReadWriteProperty
+import android.content.SharedPreferences
 
-abstract class PreferenceModel(
-    private val commitPrefs: Boolean = false
-) {
+interface PreferenceModel {
 
-    protected abstract val fileName: String
-    protected abstract val context: Context
+    val context: Context
 
-    internal val prefs get() = context.getSharedPreferences(fileName, Context.MODE_PRIVATE)
+    val fileName: String
+        get() = "${context.packageName}_preferences"
+    val commitPrefs: Boolean
+        get() = false
+    val prefs: SharedPreferences
+        get() = context.getSharedPreferences(fileName, Context.MODE_PRIVATE)
 
-    protected fun preference(
+    fun preference(
         name: String,
         default: Boolean,
         commit: Boolean = commitPrefs
-    ): ReadWriteProperty<PreferenceModel, Boolean> = BooleanProperty(name, default, commit)
+    ) = BooleanProperty(name, default, commit)
 
-    protected fun preference(
+    fun preference(
         name: String,
         default: Float,
         commit: Boolean = commitPrefs
-    ): ReadWriteProperty<PreferenceModel, Float> = FloatProperty(name, default, commit)
+    ) = FloatProperty(name, default, commit)
 
-    protected fun preference(
+    fun preference(
         name: String,
         default: Int,
         commit: Boolean = commitPrefs
-    ): ReadWriteProperty<PreferenceModel, Int> = IntProperty(name, default, commit)
+    ) = IntProperty(name, default, commit)
 
-    protected fun preference(
+    fun preference(
         name: String,
         default: Long,
         commit: Boolean = commitPrefs
-    ): ReadWriteProperty<PreferenceModel, Long> = LongProperty(name, default, commit)
+    ) = LongProperty(name, default, commit)
 
-    protected fun preference(
+    fun preference(
         name: String,
         default: String,
         commit: Boolean = commitPrefs
-    ): ReadWriteProperty<PreferenceModel, String> = StringProperty(name, default, commit)
+    ) = StringProperty(name, default, commit)
 
-    protected fun preference(
+    fun preference(
         name: String,
         default: Set<String>,
         commit: Boolean = commitPrefs
-    ): ReadWriteProperty<PreferenceModel, Set<String>> = StringSetProperty(name, default, commit)
+    ) = StringSetProperty(name, default, commit)
 
 }

app/src/main/java/com/topjohnwu/magisk/model/preference/StringProperty.kt

@@ -16,7 +16,7 @@ class StringProperty(
         property: KProperty<*>
     ): String {
         val prefName = name.trimEmptyToNull() ?: property.name
-        return runCatching { thisRef.prefs.get(prefName, default) }.getOrNull() ?: default
+        return thisRef.prefs.get(prefName, default)
     }
 
     override operator fun setValue(

app/src/main/java/com/topjohnwu/magisk/model/preference/StringSetProperty.kt

@@ -16,7 +16,7 @@ class StringSetProperty(
         property: KProperty<*>
     ): Set<String> {
         val prefName = name.trimEmptyToNull() ?: property.name
-        return runCatching { thisRef.prefs.get(prefName, default) }.getOrNull() ?: default
+        return thisRef.prefs.get(prefName, default)
     }
 
     override operator fun setValue(