93 lines
2.6 KiB
Kotlin
93 lines
2.6 KiB
Kotlin
/*
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* Pupil, Hitomi.la viewer for Android
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* Copyright (C) 2020 tom5079
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package xyz.quaver.pupil.util
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import com.google.firebase.crashlytics.FirebaseCrashlytics
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import kotlinx.serialization.ExperimentalSerializationApi
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import kotlinx.serialization.KSerializer
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import kotlinx.serialization.builtins.ListSerializer
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import kotlinx.serialization.json.Json
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import kotlinx.serialization.serializer
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import java.io.File
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class SavedSet <T: Any> (private val file: File, private val any: T, private val set: MutableSet<T> = mutableSetOf()) : MutableSet<T> by set {
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@Suppress("UNCHECKED_CAST")
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@OptIn(ExperimentalSerializationApi::class)
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val serializer: KSerializer<List<T>>
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get() = ListSerializer(serializer(any::class.java) as KSerializer<T>)
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init {
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if (!file.exists()) {
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file.parentFile?.mkdirs()
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save()
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}
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load()
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}
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@Synchronized
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fun load() {
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set.clear()
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kotlin.runCatching {
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Json.decodeFromString(serializer, file.readText())
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}.onSuccess {
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set.addAll(it)
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}.onFailure {
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FirebaseCrashlytics.getInstance().recordException(it)
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}
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}
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@Synchronized
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@OptIn(ExperimentalSerializationApi::class)
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fun save() {
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file.writeText(Json.encodeToString(serializer, set.toList()))
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}
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@Synchronized
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override fun add(element: T): Boolean {
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set.remove(element)
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return set.add(element).also {
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save()
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}
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}
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@Synchronized
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override fun addAll(elements: Collection<T>): Boolean {
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set.removeAll(elements)
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return set.addAll(elements).also {
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save()
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}
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}
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@Synchronized
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override fun remove(element: T): Boolean {
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return set.remove(element).also {
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save()
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}
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}
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@Synchronized
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override fun clear() {
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set.clear()
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save()
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}
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} |