krz/hutch

 1import Foundation
 2
 3struct LookupHistoryEntry: Codable, Hashable, Identifiable, Sendable {
 4    let type: LookupType
 5    let query: String
 6    let createdAt: Date
 7
 8    var id: String {
 9        "\(type.rawValue):\(query)"
10    }
11}
12
13enum LookupHistoryStore {
14    private static let maximumEntries = 20
15
16    static func load(defaults: UserDefaults = .standard) -> [LookupHistoryEntry] {
17        guard let data = defaults.data(forKey: AppStorageKeys.lookupHistory) else {
18            return []
19        }
20
21        do {
22            return try JSONDecoder().decode([LookupHistoryEntry].self, from: data)
23        } catch {
24            defaults.removeObject(forKey: AppStorageKeys.lookupHistory)
25            return []
26        }
27    }
28
29    static func record(
30        type: LookupType,
31        query: String,
32        defaults: UserDefaults = .standard,
33        now: Date = .now
34    ) {
35        let normalizedQuery = query.trimmingCharacters(in: .whitespacesAndNewlines)
36        guard !normalizedQuery.isEmpty else { return }
37
38        var entries = load(defaults: defaults)
39        entries.removeAll { $0.type == type && $0.query == normalizedQuery }
40        entries.insert(
41            LookupHistoryEntry(type: type, query: normalizedQuery, createdAt: now),
42            at: 0
43        )
44
45        if entries.count > maximumEntries {
46            entries = Array(entries.prefix(maximumEntries))
47        }
48
49        save(entries, defaults: defaults)
50    }
51
52    static func clear(defaults: UserDefaults = .standard) {
53        defaults.removeObject(forKey: AppStorageKeys.lookupHistory)
54    }
55
56    private static func save(_ entries: [LookupHistoryEntry], defaults: UserDefaults) {
57        guard let data = try? JSONEncoder().encode(entries) else { return }
58        defaults.set(data, forKey: AppStorageKeys.lookupHistory)
59    }
60}