mastodon-ios/Mastodon/Persistence/Persistence+Status.swift

221 lines
7.3 KiB
Swift

//
// Persistence+Status.swift
// Persistence+Status
//
// Created by Cirno MainasuK on 2021-8-27.
// Copyright © 2021 Twidere. All rights reserved.
//
import CoreData
import CoreDataStack
import Foundation
import MastodonSDK
import os.log
extension Persistence.Status {
public struct PersistContext {
public let domain: String
public let entity: Mastodon.Entity.Status
public let me: MastodonUser?
public let statusCache: Persistence.PersistCache<Status>?
public let userCache: Persistence.PersistCache<MastodonUser>?
public let networkDate: Date
public let log = OSLog.api
public init(
domain: String,
entity: Mastodon.Entity.Status,
me: MastodonUser?,
statusCache: Persistence.PersistCache<Status>?,
userCache: Persistence.PersistCache<MastodonUser>?,
networkDate: Date
) {
self.domain = domain
self.entity = entity
self.me = me
self.statusCache = statusCache
self.userCache = userCache
self.networkDate = networkDate
}
}
public struct PersistResult {
public let status: Status
public let isNewInsertion: Bool
public let isNewInsertionAuthor: Bool
public init(
status: Status,
isNewInsertion: Bool,
isNewInsertionAuthor: Bool
) {
self.status = status
self.isNewInsertion = isNewInsertion
self.isNewInsertionAuthor = isNewInsertionAuthor
}
#if DEBUG
public let logger = Logger(subsystem: "Persistence.Status.PersistResult", category: "Persist")
public func log() {
let statusInsertionFlag = isNewInsertion ? "+" : "-"
let authorInsertionFlag = isNewInsertionAuthor ? "+" : "-"
let contentPreview = status.content.prefix(32).replacingOccurrences(of: "\n", with: " ")
logger.log(level: .debug, "\((#file as NSString).lastPathComponent, privacy: .public)[\(#line, privacy: .public)], \(#function, privacy: .public): [\(statusInsertionFlag)](\(status.id))[\(authorInsertionFlag)](\(status.author.id))@\(status.author.username): \(contentPreview)")
}
#endif
}
public static func createOrMerge(
in managedObjectContext: NSManagedObjectContext,
context: PersistContext
) -> PersistResult {
let reblog = context.entity.reblog.flatMap { entity -> Status in
let result = createOrMerge(
in: managedObjectContext,
context: PersistContext(
domain: context.domain,
entity: entity,
me: context.me,
statusCache: context.statusCache,
userCache: context.userCache,
networkDate: context.networkDate
)
)
return result.status
}
if let oldStatus = fetch(in: managedObjectContext, context: context) {
merge(mastodonStatus: oldStatus, context: context)
return PersistResult(
status: oldStatus,
isNewInsertion: false,
isNewInsertionAuthor: false
)
} else {
let poll: Poll? = {
guard let entity = context.entity.poll else { return nil }
let result = Persistence.Poll.createOrMerge(
in: managedObjectContext,
context: Persistence.Poll.PersistContext(
domain: context.domain,
entity: entity,
me: context.me,
networkDate: context.networkDate
)
)
return result.poll
}()
let authorResult = Persistence.MastodonUser.createOrMerge(
in: managedObjectContext,
context: Persistence.MastodonUser.PersistContext(
domain: context.domain,
entity: context.entity.account,
cache: context.userCache,
networkDate: context.networkDate
)
)
let author = authorResult.user
let relationship = Status.Relationship(
author: author,
reblog: reblog,
poll: poll
)
let status = create(
in: managedObjectContext,
context: context,
relationship: relationship
)
return PersistResult(
status: status,
isNewInsertion: true,
isNewInsertionAuthor: authorResult.isNewInsertion
)
}
}
}
extension Persistence.Status {
public static func fetch(
in managedObjectContext: NSManagedObjectContext,
context: PersistContext
) -> Status? {
if let cache = context.statusCache {
return cache.dictionary[context.entity.id]
} else {
let request = Status.sortedFetchRequest
request.predicate = Status.predicate(domain: context.domain, id: context.entity.id)
request.fetchLimit = 1
do {
return try managedObjectContext.fetch(request).first
} catch {
assertionFailure(error.localizedDescription)
return nil
}
}
}
@discardableResult
public static func create(
in managedObjectContext: NSManagedObjectContext,
context: PersistContext,
relationship: Status.Relationship
) -> Status {
let property = Status.Property(
entity: context.entity,
domain: context.domain,
networkDate: context.networkDate
)
let status = Status.insert(
into: managedObjectContext,
property: property,
relationship: relationship
)
update(status: status, context: context)
return status
}
public static func merge(
mastodonStatus status: Status,
context: PersistContext
) {
guard context.networkDate > status.updatedAt else { return }
let property = Status.Property(
entity: context.entity,
domain: context.domain,
networkDate: context.networkDate
)
status.update(property: property)
if let poll = status.poll, let entity = context.entity.poll {
Persistence.Poll.merge(
poll: poll,
context: Persistence.Poll.PersistContext(
domain: context.domain,
entity: entity,
me: context.me,
networkDate: context.networkDate
)
)
}
update(status: status, context: context)
}
private static func update(
status: Status,
context: PersistContext
) {
// update friendships
if let user = context.me {
context.entity.reblogged.flatMap { status.update(reblogged: $0, by: user) }
context.entity.favourited.flatMap { status.update(liked: $0, by: user) }
}
}
}