80 lines
2.0 KiB
Swift
80 lines
2.0 KiB
Swift
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//
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// KeyedCache.swift
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// Passepartout
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//
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// Created by Davide De Rosa on 3/17/22.
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// Copyright (c) 2022 Davide De Rosa. All rights reserved.
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//
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// https://github.com/passepartoutvpn
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//
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// This file is part of Passepartout.
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//
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// Passepartout 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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// Passepartout 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 Passepartout. If not, see <http://www.gnu.org/licenses/>.
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//
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import Foundation
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public class KeyedCache<K: Hashable, V> {
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private let query: String
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private var store: [K: V] = [:]
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public var isEmpty: Bool {
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return store.isEmpty
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}
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public var storeValues: [V] {
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return Array(store.values)
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}
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public init(_ query: String) {
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self.query = query
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}
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public func set(_ store: [K: V]) {
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self.store = store
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}
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public func put(_ key: K, value: V) {
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store[key] = value
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}
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public func put(_ key: K, valueBlock: (K) -> V?) -> V? {
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if let cachedValue = store[key] {
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return cachedValue
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}
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guard let value = valueBlock(key) else {
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return nil
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}
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store[key] = value
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pp_log.debug("Cache MISS [\(query)]")
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return value
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}
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public func forget(where condition: (K) -> Bool) {
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let removedKeys = store.keys.filter(condition)
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removedKeys.forEach {
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store.removeValue(forKey: $0)
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}
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}
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public func forget(_ key: K) {
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store.removeValue(forKey: key)
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}
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public func clear() {
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store.removeAll()
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}
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}
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