fd2be632a1
CacheMaintenance prunes the SwiftData caches so they don't grow forever: seen markers >30d, read >90d, cached articles >30d, cached stories >14d — always protecting saved bookmarks. Runs on launch. Settings gains a "Clear offline cache" action (keeps saved) with a count + confirmation. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
62 lines
2.7 KiB
Swift
62 lines
2.7 KiB
Swift
// CacheMaintenance.swift
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// Jarvis — bounds the on-device SwiftData caches so they don't grow forever.
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// Saved (bookmarked) stories are always protected.
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import Foundation
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import SwiftData
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@MainActor
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enum CacheMaintenance {
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private static let day: TimeInterval = 86_400
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// Retention windows.
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private static let seenDays = 30.0 // "seen" markers: only useful while a story is live
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private static let readDays = 90.0 // read history: small, keep longer
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private static let articleDays = 30.0 // offline article bodies
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private static let storyDays = 14.0 // offline story list
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/// Age-based eviction. Run on launch. Cheap; protects saved stories.
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static func prune(_ context: ModelContext) {
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let now = Date()
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let seenCutoff = now.addingTimeInterval(-seenDays * day)
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let readCutoff = now.addingTimeInterval(-readDays * day)
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let articleCutoff = now.addingTimeInterval(-articleDays * day)
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let storyCutoff = now.addingTimeInterval(-storyDays * day)
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// Markers: simple age batch deletes.
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try? context.delete(model: SeenStory.self, where: #Predicate { $0.seenAt < seenCutoff })
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try? context.delete(model: ReadStory.self, where: #Predicate { $0.readAt < readCutoff })
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// Offline content: drop old entries that aren't saved.
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let saved = savedIDs(context)
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if let arts = try? context.fetch(
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FetchDescriptor<CachedArticle>(predicate: #Predicate { $0.cachedAt < articleCutoff })) {
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for a in arts where !saved.contains(a.storyId) { context.delete(a) }
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}
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if let stories = try? context.fetch(
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FetchDescriptor<CachedStory>(predicate: #Predicate { $0.cachedAt < storyCutoff })) {
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for s in stories where !saved.contains(s.id) { context.delete(s) }
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}
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try? context.save()
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}
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/// Manual "Clear cache" — wipes offline stories/articles + seen/read state,
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/// keeps your saved bookmarks (and their articles).
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static func clear(_ context: ModelContext) {
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try? context.delete(model: SeenStory.self)
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try? context.delete(model: ReadStory.self)
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let saved = savedIDs(context)
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if let arts = try? context.fetch(FetchDescriptor<CachedArticle>()) {
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for a in arts where !saved.contains(a.storyId) { context.delete(a) }
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}
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if let stories = try? context.fetch(FetchDescriptor<CachedStory>()) {
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for s in stories where !saved.contains(s.id) { context.delete(s) }
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}
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try? context.save()
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}
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private static func savedIDs(_ context: ModelContext) -> Set<String> {
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Set((try? context.fetch(FetchDescriptor<SavedStory>()))?.map(\.id) ?? [])
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}
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}
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