60 lines
1.6 KiB
Swift
60 lines
1.6 KiB
Swift
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import Foundation
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final class HistoryManager {
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private var fm: FileManager {
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.default
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}
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var documentDirectory: URL {
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try! fm.url(
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for: .documentDirectory,
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in: .userDomainMask,
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appropriateFor: nil, create: true)
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}
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private var fileUrl: URL {
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documentDirectory.appendingPathComponent("history.bin")
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}
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func loadEntries() -> [HistoryItem] {
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let url = fileUrl
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guard fm.fileExists(atPath: url.path) else {
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print("No history data found")
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return []
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}
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let content: Data
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do {
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content = try Data(contentsOf: url)
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} catch {
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print("Failed to read history data: \(error)")
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return []
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}
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var index = 0
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var entries = [HistoryItem]()
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while index < content.count {
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guard let entry = HistoryItem(decodeFrom: content, index: &index) else {
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print("Failed to read entry at index \(index)")
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return entries
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}
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entries.append(entry)
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}
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return entries.sorted().reversed()
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}
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func save(item: HistoryItem) throws {
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let url = fileUrl
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let data = item.encoded
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guard fm.fileExists(atPath: url.path) else {
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try data.write(to: url)
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print("First history item written")
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return
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}
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let handle = try FileHandle(forWritingTo: url)
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try handle.seekToEnd()
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try handle.write(contentsOf: data)
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try handle.close()
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print("History item written")
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}
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}
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