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add ability to check the freshness of a PersistedProfile

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This commit is contained in:
Bryan Montz 2023-05-15 08:31:49 -05:00
parent 3f7b0a4d6e
commit d58a1e0ba3
2 changed files with 21 additions and 1 deletions
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2
damus/Nostr/ProfileDatabase.swift
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@ -66,7 +66,7 @@ final class ProfileDatabase {
background_context?.mergePolicy = NSMergePolicy(merge: .mergeByPropertyObjectTrumpMergePolicyType)
}
private func get_persisted(id: String) -> PersistedProfile? {
func get_persisted(id: String) -> PersistedProfile? {
let request = NSFetchRequest<PersistedProfile>(entityName: entity_name)
request.predicate = NSPredicate(format: "id == %@", id)
request.fetchLimit = 1

20
damus/Nostr/Profiles.swift
View File

@ -9,6 +9,8 @@ import Foundation
class Profiles {
static let db_freshness_threshold: TimeInterval = 24 * 60 * 60
/// This queue is used to synchronize access to the profiles dictionary, which
/// prevents data races from crashing the app.
private var queue = DispatchQueue(label: "io.damus.profiles",
@ -55,4 +57,22 @@ class Profiles {
return profiles[id]
}
}
func has_fresh_profile(id: String) -> Bool {
// check memory first
var profile: Profile?
queue.sync {
profile = profiles[id]?.profile
}
if profile != nil {
return true
}
// then disk
guard let persisted_profile = database.get_persisted(id: id),
let pull_date = persisted_profile.network_pull_date else {
return false
}
return Date.now.timeIntervalSince(pull_date) < Profiles.db_freshness_threshold
}
}