280 lines
10 KiB
Swift
280 lines
10 KiB
Swift
// Copyright © 2020 Metabolist. All rights reserved.
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import Foundation
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import Combine
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import GRDB
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enum IdentityDatabaseError: Error {
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case identityNotFound
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}
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struct IdentityDatabase {
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private let databaseQueue: DatabaseQueue
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init(inMemory: Bool = false) throws {
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guard
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let documentsDirectory = NSSearchPathForDirectoriesInDomains(
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.documentDirectory,
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.userDomainMask, true)
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.first
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else { throw DatabaseError.documentsDirectoryNotFound }
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if inMemory {
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databaseQueue = DatabaseQueue()
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} else {
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databaseQueue = try DatabaseQueue(path: "\(documentsDirectory)/IdentityDatabase.sqlite3")
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}
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try Self.migrate(databaseQueue)
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}
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}
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extension IdentityDatabase {
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func createIdentity(id: UUID, url: URL) -> AnyPublisher<Void, Error> {
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databaseQueue.writePublisher(
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updates: StoredIdentity(
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id: id,
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url: url,
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lastUsedAt: Date(),
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preferences: Identity.Preferences(),
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instanceURI: nil,
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lastRegisteredDeviceToken: nil,
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pushSubscriptionAlerts: .initial)
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.save)
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.eraseToAnyPublisher()
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}
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func deleteIdentity(id: UUID) -> AnyPublisher<Void, Error> {
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return databaseQueue.writePublisher(updates: StoredIdentity.filter(Column("id") == id).deleteAll)
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.map { _ in () }
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.eraseToAnyPublisher()
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}
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func updateLastUsedAt(identityID: UUID) -> AnyPublisher<Void, Error> {
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databaseQueue.writePublisher {
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try StoredIdentity
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.filter(Column("id") == identityID)
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.updateAll($0, Column("lastUsedAt").set(to: Date()))
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}
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.eraseToAnyPublisher()
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}
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func updateInstance(_ instance: Instance, forIdentityID identityID: UUID) -> AnyPublisher<Void, Error> {
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databaseQueue.writePublisher {
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try Identity.Instance(
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uri: instance.uri,
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streamingAPI: instance.urls.streamingApi,
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title: instance.title,
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thumbnail: instance.thumbnail)
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.save($0)
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try StoredIdentity
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.filter(Column("id") == identityID)
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.updateAll($0, Column("instanceURI").set(to: instance.uri))
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}
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.eraseToAnyPublisher()
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}
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func updateAccount(_ account: Account, forIdentityID identityID: UUID) -> AnyPublisher<Void, Error> {
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databaseQueue.writePublisher(
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updates: Identity.Account(
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id: account.id,
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identityID: identityID,
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username: account.username,
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displayName: account.displayName,
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url: account.url,
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avatar: account.avatar,
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avatarStatic: account.avatarStatic,
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header: account.header,
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headerStatic: account.headerStatic,
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emojis: account.emojis)
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.save)
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.eraseToAnyPublisher()
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}
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func updatePreferences(_ preferences: Identity.Preferences,
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forIdentityID identityID: UUID) -> AnyPublisher<Void, Error> {
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databaseQueue.writePublisher {
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let data = try StoredIdentity.databaseJSONEncoder(for: "preferences").encode(preferences)
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try StoredIdentity
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.filter(Column("id") == identityID)
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.updateAll($0, Column("preferences").set(to: data))
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}
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.eraseToAnyPublisher()
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}
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func updatePushSubscription(alerts: PushSubscription.Alerts,
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deviceToken: String? = nil,
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forIdentityID identityID: UUID) -> AnyPublisher<Void, Error> {
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databaseQueue.writePublisher {
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let data = try StoredIdentity.databaseJSONEncoder(for: "pushSubscriptionAlerts").encode(alerts)
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try StoredIdentity
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.filter(Column("id") == identityID)
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.updateAll($0, Column("pushSubscriptionAlerts").set(to: data))
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if let deviceToken = deviceToken {
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try StoredIdentity
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.filter(Column("id") == identityID)
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.updateAll($0, Column("lastRegisteredDeviceToken").set(to: deviceToken))
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}
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}
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.eraseToAnyPublisher()
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}
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func identityObservation(id: UUID) -> AnyPublisher<Identity, Error> {
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ValueObservation.tracking(
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StoredIdentity
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.filter(Column("id") == id)
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.including(optional: StoredIdentity.instance)
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.including(optional: StoredIdentity.account)
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.asRequest(of: IdentityResult.self)
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.fetchOne)
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.removeDuplicates()
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.publisher(in: databaseQueue, scheduling: .immediate)
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.tryMap {
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guard let result = $0 else { throw IdentityDatabaseError.identityNotFound }
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return Identity(result: result)
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}
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.eraseToAnyPublisher()
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}
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func identitiesObservation() -> AnyPublisher<[Identity], Error> {
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ValueObservation.tracking(Self.identitiesRequest().fetchAll)
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.removeDuplicates()
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.publisher(in: databaseQueue, scheduling: .immediate)
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.map { $0.map(Identity.init(result:)) }
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.eraseToAnyPublisher()
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}
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func recentIdentitiesObservation(excluding: UUID) -> AnyPublisher<[Identity], Error> {
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ValueObservation.tracking(
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Self.identitiesRequest()
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.filter(Column("id") != excluding)
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.limit(9)
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.fetchAll)
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.removeDuplicates()
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.publisher(in: databaseQueue, scheduling: .immediate)
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.map { $0.map(Identity.init(result:)) }
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.eraseToAnyPublisher()
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}
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func mostRecentlyUsedIdentityIDObservation() -> AnyPublisher<UUID?, Error> {
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ValueObservation.tracking(StoredIdentity.select(Column("id")).order(Column("lastUsedAt").desc).fetchOne)
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.removeDuplicates()
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.publisher(in: databaseQueue, scheduling: .immediate)
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.eraseToAnyPublisher()
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}
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func identitiesWithOutdatedDeviceTokens(deviceToken: String) -> AnyPublisher<[Identity], Error> {
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databaseQueue.readPublisher(
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value: Self.identitiesRequest()
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.filter(Column("lastRegisteredDeviceToken") != deviceToken)
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.fetchAll)
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.map { $0.map(Identity.init(result:)) }
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.eraseToAnyPublisher()
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}
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}
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private extension IdentityDatabase {
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private static func identitiesRequest() -> QueryInterfaceRequest<IdentityResult> {
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StoredIdentity
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.order(Column("lastUsedAt").desc)
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.including(optional: StoredIdentity.instance)
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.including(optional: StoredIdentity.account)
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.asRequest(of: IdentityResult.self)
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}
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private static func migrate(_ writer: DatabaseWriter) throws {
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var migrator = DatabaseMigrator()
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migrator.registerMigration("createIdentities") { db in
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try db.create(table: "instance", ifNotExists: true) { t in
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t.column("uri", .text).notNull().primaryKey(onConflict: .replace)
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t.column("streamingAPI", .text)
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t.column("title", .text)
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t.column("thumbnail", .text)
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}
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try db.create(table: "storedIdentity", ifNotExists: true) { t in
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t.column("id", .text).notNull().primaryKey(onConflict: .replace)
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t.column("url", .text).notNull()
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t.column("lastUsedAt", .datetime).notNull()
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t.column("instanceURI", .text)
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.indexed()
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.references("instance", column: "uri")
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t.column("preferences", .blob).notNull()
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t.column("pushSubscriptionAlerts", .blob).notNull()
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t.column("lastRegisteredDeviceToken", .text)
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}
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try db.create(table: "account", ifNotExists: true) { t in
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t.column("id", .text).notNull().primaryKey(onConflict: .replace)
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t.column("identityID", .text)
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.notNull()
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.indexed()
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.references("storedIdentity", column: "id", onDelete: .cascade)
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t.column("username", .text).notNull()
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t.column("displayName", .text).notNull()
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t.column("url", .text).notNull()
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t.column("avatar", .text).notNull()
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t.column("avatarStatic", .text).notNull()
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t.column("header", .text).notNull()
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t.column("headerStatic", .text).notNull()
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t.column("emojis", .blob).notNull()
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}
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}
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try migrator.migrate(writer)
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}
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}
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private struct StoredIdentity: Codable, Hashable, TableRecord, FetchableRecord, PersistableRecord {
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let id: UUID
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let url: URL
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let lastUsedAt: Date
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let preferences: Identity.Preferences
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let instanceURI: String?
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let lastRegisteredDeviceToken: String?
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let pushSubscriptionAlerts: PushSubscription.Alerts
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}
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extension StoredIdentity {
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static let instance = belongsTo(Identity.Instance.self, key: "instance")
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static let account = hasOne(Identity.Account.self, key: "account")
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var instance: QueryInterfaceRequest<Identity.Instance> {
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request(for: Self.instance)
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}
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var account: QueryInterfaceRequest<Identity.Account> {
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request(for: Self.account)
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}
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}
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private struct IdentityResult: Codable, Hashable, FetchableRecord {
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let identity: StoredIdentity
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let instance: Identity.Instance?
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let account: Identity.Account?
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let pushSubscriptionAlerts: PushSubscription.Alerts
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}
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private extension Identity {
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init(result: IdentityResult) {
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self.init(
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id: result.identity.id,
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url: result.identity.url,
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lastUsedAt: result.identity.lastUsedAt,
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preferences: result.identity.preferences,
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instance: result.instance,
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account: result.account,
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lastRegisteredDeviceToken: result.identity.lastRegisteredDeviceToken,
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pushSubscriptionAlerts: result.pushSubscriptionAlerts)
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}
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}
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extension Identity.Instance: TableRecord, FetchableRecord, PersistableRecord {}
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extension Identity.Account: TableRecord, FetchableRecord, PersistableRecord {}
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