Enable log export across multiple sessions for better diagnostic support

VoiceInk/Services/LogExporter.swift

@@ -1,111 +1,140 @@
 import Foundation
 import OSLog
 
-/// Utility class for exporting app logs since launch for diagnostic purposes
 final class LogExporter {
     static let shared = LogExporter()
 
     private let logger = Logger(subsystem: "com.prakashjoshipax.voiceink", category: "LogExporter")
     private let subsystem = "com.prakashjoshipax.voiceink"
+    private let maxSessionsToKeep = 3
+    private let sessionsKey = "logExporter.sessionStartDates.v1"
 
-    /// Timestamp when the app was launched
-    let launchDate: Date
+    private(set) var sessionStartDates: [Date] = []
 
     private init() {
-        self.launchDate = Date()
-        logger.notice("🎙️ LogExporter initialized, launch timestamp recorded")
+        var loadedDates: [Date] = []
+        if let data = UserDefaults.standard.data(forKey: sessionsKey),
+           let dates = try? JSONDecoder().decode([Date].self, from: data) {
+            loadedDates = dates
+        }
+
+        sessionStartDates = [Date()] + loadedDates
+        sessionStartDates = Array(sessionStartDates.prefix(maxSessionsToKeep))
+        saveSessions()
+
+        logger.notice("🎙️ LogExporter initialized, \(self.sessionStartDates.count) session(s) tracked")
+    }
+
+    private func saveSessions() {
+        if let data = try? JSONEncoder().encode(sessionStartDates) {
+            UserDefaults.standard.set(data, forKey: sessionsKey)
+        }
     }
 
-    /// Exports logs since app launch to a file and returns the file URL
     func exportLogs() async throws -> URL {
-        logger.notice("🎙️ Starting log export since \(self.launchDate)")
-
-        let logs = try await fetchLogsSinceLaunch()
+        logger.notice("🎙️ Starting log export")
 
+        let logs = try await fetchLogs()
         let fileURL = try saveLogsToFile(logs)
 
         logger.notice("🎙️ Log export completed: \(fileURL.path)")
-
         return fileURL
     }
 
-    /// Fetches logs from OSLogStore since app launch
-    private func fetchLogsSinceLaunch() async throws -> [String] {
-        let store = try OSLogStore(scope: .currentProcessIdentifier)
-
-        // Get logs since launch
-        let position = store.position(date: launchDate)
-
-        // Create predicate to filter by our subsystem
+    private func fetchLogs() async throws -> [String] {
+        let store = try OSLogStore(scope: .system)
         let predicate = NSPredicate(format: "subsystem == %@", subsystem)
 
-        let entries = try store.getEntries(at: position, matching: predicate)
-
         var logLines: [String] = []
-
-        // Add header
         let dateFormatter = DateFormatter()
         dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss.SSS"
 
         logLines.append("=== VoiceInk Diagnostic Logs ===")
         logLines.append("Export Date: \(dateFormatter.string(from: Date()))")
-        logLines.append("App Launch: \(dateFormatter.string(from: launchDate))")
         logLines.append("Subsystem: \(subsystem)")
+        logLines.append("Total Sessions: \(sessionStartDates.count)")
         logLines.append("================================")
         logLines.append("")
 
+        // Build session ranges with labels
+        let totalSessions = sessionStartDates.count
+        var sessionRanges: [(label: String, start: Date, end: Date?)] = []
+
+        for i in 0..<totalSessions {
+            let start = sessionStartDates[i]
+            let end: Date? = (i == 0) ? nil : sessionStartDates[i - 1]
+            let sessionNumber = totalSessions - i
+
+            let label: String
+            if totalSessions == 1 {
+                label = "Session 1 (Current)"
+            } else if i == 0 {
+                label = "Session \(sessionNumber) (Current)"
+            } else if i == totalSessions - 1 {
+                label = "Session 1 (Oldest)"
+            } else {
+                label = "Session \(sessionNumber)"
+            }
+
+            sessionRanges.append((label, start, end))
+        }
+
+        // Fetch logs for each session (oldest first for chronological order)
+        for (label, startDate, endDate) in sessionRanges.reversed() {
+            logLines.append("--- \(label) ---")
+            logLines.append("")
+
+            let position = store.position(date: startDate)
+            let entries = try store.getEntries(at: position, matching: predicate)
+
+            var sessionLogCount = 0
             for entry in entries {
                 guard let logEntry = entry as? OSLogEntryLog else { continue }
 
+                if let endDate, logEntry.date >= endDate { break }
+
                 let timestamp = dateFormatter.string(from: logEntry.date)
                 let level = logLevelString(logEntry.level)
                 let category = logEntry.category
                 let message = logEntry.composedMessage
 
                 logLines.append("[\(timestamp)] [\(level)] [\(category)] \(message)")
+                sessionLogCount += 1
             }
 
-        if logLines.count <= 6 { // Only header lines
-            logLines.append("No logs found since app launch.")
+            if sessionLogCount == 0 {
+                logLines.append("No logs found for this session.")
+            }
+
+            logLines.append("")
         }
 
         return logLines
     }
 
-    /// Converts OSLogEntryLog.Level to a readable string
     private func logLevelString(_ level: OSLogEntryLog.Level) -> String {
         switch level {
-        case .undefined:
-            return "UNDEFINED"
-        case .debug:
-            return "DEBUG"
-        case .info:
-            return "INFO"
-        case .notice:
-            return "NOTICE"
-        case .error:
-            return "ERROR"
-        case .fault:
-            return "FAULT"
-        @unknown default:
-            return "UNKNOWN"
+        case .undefined: return "UNDEFINED"
+        case .debug: return "DEBUG"
+        case .info: return "INFO"
+        case .notice: return "NOTICE"
+        case .error: return "ERROR"
+        case .fault: return "FAULT"
+        @unknown default: return "UNKNOWN"
         }
     }
 
-    /// Saves logs to a file in the Downloads folder
     private func saveLogsToFile(_ logs: [String]) throws -> URL {
         let dateFormatter = DateFormatter()
         dateFormatter.dateFormat = "yyyy-MM-dd_HH-mm-ss"
         let timestamp = dateFormatter.string(from: Date())
-
         let fileName = "VoiceInk_Logs_\(timestamp).log"
 
-        // Get Downloads folder
         guard let downloadsURL = FileManager.default.urls(for: .downloadsDirectory, in: .userDomainMask).first else {
             throw NSError(domain: "LogExporter", code: 1, userInfo: [NSLocalizedDescriptionKey: "Downloads directory unavailable"])
         }
-        let fileURL = downloadsURL.appendingPathComponent(fileName)
 
+        let fileURL = downloadsURL.appendingPathComponent(fileName)
         let content = logs.joined(separator: "\n")
         try content.write(to: fileURL, atomically: true, encoding: .utf8)