49 lines
969 B
Swift
49 lines
969 B
Swift
//
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// AuthorsTable.swift
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// Database
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//
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// Created by Brent Simmons on 7/13/17.
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// Copyright © 2017 Ranchero Software. All rights reserved.
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//
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import Foundation
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import RSDatabase
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import Data
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final class AuthorsTable: DatabaseTable {
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let name: String
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let queue: RSDatabaseQueue
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private let cache = ObjectCache<Author>(keyPathForID: \Author.databaseID)
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init(name: String, queue: RSDatabaseQueue) {
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self.name = name
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self.queue = queue
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}
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func authorWithRow(_ row: FMResultSet) -> Author? {
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// Since:
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// 1. anything to do with an FMResultSet runs inside the database serial queue, and
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// 2. the cache is referenced only within this method,
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// this is safe.
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guard let databaseID = row.string(forColumn: DatabaseKey.databaseID) else {
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return nil
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}
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if let cachedAuthor = cache[databaseID] {
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return cachedAuthor
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}
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guard let author = Author(row: row) else {
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return nil
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}
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cache[databaseID] = author
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return author
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}
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}
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