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46 lines
1.7 KiB
Kotlin
46 lines
1.7 KiB
Kotlin
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.components.settings
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import mozilla.components.support.ktx.android.content.PreferencesHolder
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import mozilla.components.support.ktx.android.content.booleanPreference
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import kotlin.properties.ReadWriteProperty
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import kotlin.reflect.KProperty
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private class DummyProperty : ReadWriteProperty<PreferencesHolder, Boolean> {
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override fun getValue(thisRef: PreferencesHolder, property: KProperty<*>) = false
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override fun setValue(thisRef: PreferencesHolder, property: KProperty<*>, value: Boolean) = Unit
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}
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/**
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* Property delegate for getting and setting a boolean shared preference gated by a feature flag.
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*/
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fun featureFlagPreference(key: String, default: Boolean, featureFlag: Boolean) =
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if (featureFlag) {
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booleanPreference(key, default)
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} else {
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DummyProperty()
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}
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private class LazyPreference(val key: String, val default: () -> Boolean) :
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ReadWriteProperty<PreferencesHolder, Boolean> {
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override fun getValue(thisRef: PreferencesHolder, property: KProperty<*>) =
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thisRef.preferences.getBoolean(key, default())
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override fun setValue(thisRef: PreferencesHolder, property: KProperty<*>, value: Boolean) =
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thisRef.preferences.edit().putBoolean(key, value).apply()
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}
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/**
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* Property delegate for getting and setting lazily a boolean shared preference gated by a feature flag.
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*/
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fun lazyFeatureFlagPreference(key: String, featureFlag: Boolean, default: () -> Boolean) =
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if (featureFlag) {
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LazyPreference(key, default)
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} else {
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DummyProperty()
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}
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