LiveTranscriptMonitor.swift

import Foundation

/// Dedicated monitor for live transcript segments that doesn't trigger global AppState re-renders.
/// Only views that explicitly observe this class will update when transcript changes.
@MainActor
class LiveTranscriptMonitor: ObservableObject {
  static let shared = LiveTranscriptMonitor()

  /// Live speaker segments for real-time transcript display
  @Published private(set) var segments: [SpeakerSegment] = []

  /// Snapshot of segments saved before clear, so the transcript survives recording stop
  @Published private(set) var savedSegments: [SpeakerSegment] = []

  private init() {}

  /// Update segments - called from transcription service
  func updateSegments(_ newSegments: [SpeakerSegment]) {
    segments = newSegments
  }

  /// Clear live segments, automatically snapshotting them to savedSegments
  func clear() {
    if !segments.isEmpty {
      savedSegments = segments
    }
    segments = []
  }

  /// Clear the saved snapshot (e.g. when user collapses the transcript panel)
  func clearSaved() {
    savedSegments = []
  }

  /// Check if there are any segments
  var isEmpty: Bool {
    segments.isEmpty
  }

  /// Get the latest transcript text
  var latestText: String? {
    segments.last?.text
  }
}