b17fb3c354
- Revamp whole DB to Display flow - Filter Pipeline, arbitrary filtering and sorting - Binary tree arrays for faster lookup & manipulation - DB: introducing custom functions - DB scheme: split req into heap & cache - cache written by GlassVPN only - heap written by Main App only - Introducing DB separation: DBCore, DBCommon, DBAppOnly - Introducing DB data sources: TestDataSource, GroupedDomainDataSource, RecordingsDB, DomainFilter - Background sync: Move entries from cache to heap and notify all observers - GlassVPN: Binary tree filter lookup - GlassVPN: Reusing prepared statement
45 lines
1.4 KiB
Swift
45 lines
1.4 KiB
Swift
import Foundation
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class SyncUpdate {
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private var timer: Timer!
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private var paused: Int = 1 // first start() will decrement
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private(set) var tsEarliest: Timestamp
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init(periodic interval: TimeInterval) {
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tsEarliest = Pref.DateFilter.lastXMinTimestamp() ?? 0
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NotifyDateFilterChanged.observe(call: #selector(didChangeDateFilter), on: self)
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timer = Timer.repeating(interval, call: #selector(periodicUpdate), on: self)
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}
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@objc private func didChangeDateFilter() {
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let lastXFilter = Pref.DateFilter.lastXMinTimestamp() ?? 0
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if tsEarliest < lastXFilter {
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if let excess = AppDB?.dnsLogsRowRange(between: tsEarliest, and: lastXFilter) {
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NotifySyncRemove.post(excess)
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}
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} else if tsEarliest > lastXFilter {
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if let missing = AppDB?.dnsLogsRowRange(between: lastXFilter, and: tsEarliest) {
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NotifySyncInsert.post(missing)
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}
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}
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tsEarliest = lastXFilter
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}
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func pause() { paused += 1 }
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func start() { if paused > 0 { paused -= 1 } }
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@objc private func periodicUpdate() {
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guard paused == 0, let db = AppDB else { return }
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if let inserted = db.dnsLogsPersist() { // move cache -> heap
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NotifySyncInsert.post(inserted)
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}
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if let lastXFilter = Pref.DateFilter.lastXMinTimestamp(), tsEarliest < lastXFilter {
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if let removed = db.dnsLogsRowRange(between: tsEarliest, and: lastXFilter) {
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NotifySyncRemove.post(removed)
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}
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tsEarliest = lastXFilter
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}
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// TODO: periodic hard delete old logs (will reset rowids!)
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}
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}
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