51 lines
1.8 KiB
Swift
51 lines
1.8 KiB
Swift
import Foundation
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struct HistoryEntry: Codable, Equatable {
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let role: String
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let text: String
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let timestamp: Date
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}
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/// Last 50 final transcript entries persisted as JSON in UserDefaults.
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///
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/// Persistence-only store. The visible transcript is the single canonical
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/// collection owned by `TranscriptHandler.events`; this class provides the
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/// durable snapshot it initializes from and syncs to. It performs no dedupe —
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/// all suppression is source-aware and time-bounded in the handler.
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@MainActor
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final class TranscriptHistory: ObservableObject {
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@Published private(set) var entries: [HistoryEntry] = []
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static let key = "voice_history"
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static let maxEntries = 50
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init() {
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if let raw = UserDefaults.standard.string(forKey: Self.key),
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let data = raw.data(using: .utf8),
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let decoded = try? JSONDecoder().decode([HistoryEntry].self, from: data) {
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entries = Array(decoded.suffix(Self.maxEntries))
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}
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}
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/// Replaces the persisted snapshot with exactly the finals currently in the
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/// canonical visible collection. Called by `TranscriptHandler` after every
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/// change so persistence and the UI never diverge. No dedupe is applied here:
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/// same-source repeats are legitimate entries.
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func sync(finals: [(role: String, text: String, timestamp: Date)]) {
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entries = Array(finals.suffix(Self.maxEntries).map {
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HistoryEntry(role: $0.role, text: $0.text, timestamp: $0.timestamp)
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})
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persist()
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}
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func clear() {
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entries.removeAll()
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persist()
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}
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private func persist() {
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guard let data = try? JSONEncoder().encode(entries) else { return }
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UserDefaults.standard.set(String(decoding: data, as: UTF8.self), forKey: Self.key)
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}
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}
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