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/*
* Copyright 2018 Allan Wang
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ca.allanwang.kau.kpref
import android.content.Context
import android.content.SharedPreferences
import ca.allanwang.kau.kotlin.ILazyResettable
import ca.allanwang.kau.logging.KL
/**
* Created by Allan Wang on 2017-06-07.
*
* Base class for shared preferences
* All objects extending this class must be called in
* the app's [android.app.Application] class
*
* See the [KPref.kpref] extensions for more details
*
* Furthermore, all kprefs are held in the [prefMap],
* so if you wish to reset a preference, you must also invalidate the kpref
* from that map
*
* You may optionally override [deleteKeys]. This will be called on initialization
* And delete all keys returned from that method
*/
open class KPref(builder: KPrefBuilder = KPrefBuilderAndroid) : KPrefBuilder by builder {
lateinit var PREFERENCE_NAME: String
lateinit var sp: SharedPreferences
fun initialize(
c: Context,
preferenceName: String,
sharedPrefs: SharedPreferences = c.applicationContext.getSharedPreferences(preferenceName, Context.MODE_PRIVATE)
) {
PREFERENCE_NAME = preferenceName
sp = sharedPrefs
KL.d { "Shared Preference $preferenceName has been initialized" }
val toDelete = deleteKeys()
if (toDelete.isNotEmpty()) {
val edit = sp.edit()
toDelete.forEach { edit.remove(it) }
edit.apply()
}
}
internal val prefMap: MutableMap<String, ILazyResettable<*>> = mutableMapOf()
fun reset() {
prefMap.values.forEach { it.invalidate() }
}
operator fun get(key: String): ILazyResettable<*>? = prefMap[key]
open fun deleteKeys(): Array<String> = arrayOf()
}
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