132 lines
3.4 KiB
Swift
132 lines
3.4 KiB
Swift
import MultipeerConnectivity
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import Foundation
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import Combine
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struct NoteInvitation: Identifiable {
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struct NoteContent: Codable {
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let title: String
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let noteSnapshot: String
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}
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var id: MCPeerID { invitatorID }
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var noteName: String { note.title }
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let invitatorID: MCPeerID
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let note: NoteContent
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private var invitationHandler: ((Bool) -> Void)?
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init(
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invitatorID: MCPeerID,
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note: NoteContent,
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invitationHandler: ((Bool) -> Void)? = nil
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) {
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self.invitatorID = invitatorID
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self.note = note
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self.invitationHandler = invitationHandler
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}
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mutating func accept() {
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invitationHandler?(true)
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invitationHandler = nil
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}
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mutating func decline() {
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invitationHandler?(false)
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invitationHandler = nil
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}
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}
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@Observable
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final class NoteEditingSessionClient: NSObject {
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private let session: MCSession
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private let advertiser: MCNearbyServiceAdvertiser
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private(set) var ownPeer: MCPeerID
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var invitations: [NoteInvitation] = []
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let noteChangesEmitter = PassthroughSubject<NoteMessage, Never>()
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init(peer: MCPeerID) {
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ownPeer = peer
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session = MCSession(
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peer: peer,
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securityIdentity: nil,
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encryptionPreference: .required
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)
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advertiser = MCNearbyServiceAdvertiser(
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peer: peer,
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discoveryInfo: [:],
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serviceType: "peered"
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)
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super.init()
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advertiser.delegate = self
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session.delegate = self
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}
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func startBrowsingForNotes() {
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advertiser.startAdvertisingPeer()
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}
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func stopBrowsingForNotes() {
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advertiser.stopAdvertisingPeer()
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session.disconnect()
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}
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func send(note: String, to peer: MCPeerID) {
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let message = NoteMessage(senderID: ownPeer.displayName, content: note)
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guard let data = try? JSONEncoder().encode(message) else { return }
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try? session.send(data, toPeers: [peer], with: .reliable)
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}
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}
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extension NoteEditingSessionClient: MCNearbyServiceAdvertiserDelegate {
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func advertiser(
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_ advertiser: MCNearbyServiceAdvertiser,
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didReceiveInvitationFromPeer peerID: MCPeerID,
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withContext context: Data?,
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invitationHandler: @escaping (Bool, MCSession?) -> Void
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) {
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guard
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let context,
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let noteContent = try? JSONDecoder().decode(NoteInvitation.NoteContent.self, from: context)
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else { return }
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DispatchQueue.main.async {
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self.invitations.append(
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.init(
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invitatorID: peerID,
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note: noteContent,
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invitationHandler: { [weak self, invitationHandler] accepted in
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guard let self else { return }
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invitationHandler(accepted, self.session)
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DispatchQueue.main.async {
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self.invitations.removeAll { $0.id == peerID }
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}
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}
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)
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)
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}
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}
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}
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extension NoteEditingSessionClient: MCSessionDelegate {
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func session(
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_ session: MCSession,
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peer peerID: MCPeerID,
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didChange state: MCSessionState
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) {}
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func session(
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_ session: MCSession,
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didReceive data: Data,
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fromPeer peerID: MCPeerID
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) {
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guard let message = try? JSONDecoder().decode(NoteMessage.self, from: data) else { return }
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DispatchQueue.main.async {
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self.noteChangesEmitter.send(message)
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}
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}
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func session(_ session: MCSession, didReceive stream: InputStream, withName streamName: String, fromPeer peerID: MCPeerID) {}
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func session(_ session: MCSession, didStartReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, with progress: Progress) {}
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func session(_ session: MCSession, didFinishReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, at localURL: URL?, withError error: (any Error)?) {}
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}
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