89 lines
3.1 KiB
Swift
89 lines
3.1 KiB
Swift
import Foundation
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// TODO: add versioning (XEP-0237) if needed
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// TODO: implement error catching
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final class RosterModule: XmppModule {
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let id = "Roseter module"
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private weak var storage: (any XMPPStorage)?
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init(_ storage: any XMPPStorage) {
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self.storage = storage
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}
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func reduce(oldState: ClientState, with _: Event) -> ClientState {
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oldState
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}
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func process(state: ClientState, with event: Event) async -> Event? {
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switch event {
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case .streamReady:
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return .requestRoster
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case .requestRoster:
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let req = Stanza.iqGet(
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from: state.jid.full,
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payload: XMLElement(name: "query", xmlns: "jabber:iq:roster", attributes: [:], content: nil, nodes: [])
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)
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if let req {
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return .stanzaOutbound(req)
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} else {
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return nil
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}
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case .stanzaInbound(let stanza):
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if let query = stanza.wrapped.nodes.first(where: { $0.name == "query" }), query.xmlns == "jabber:iq:roster" {
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return await processRoster(state: state, stanza: stanza)
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} else {
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return nil
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}
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default:
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return nil
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}
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}
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}
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private extension RosterModule {
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func processRoster(state: ClientState, stanza: Stanza) async -> Event? {
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// get inner query
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guard let query = stanza.wrapped.nodes.first(where: { $0.name == "query" })
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else { return nil }
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// get exists roster items
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var existItems: [RosterItem] = []
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if let data = await storage?.getRoster(jid: state.jid), let decoded = try? JSONDecoder().decode([XMLElement].self, from: data) {
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existItems = decoded.compactMap { RosterItem(wrap: $0, owner: state.jid) }
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}
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// process push (.set from server)
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if stanza.type == .iq(.set) {
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guard
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let item = query.nodes.first(where: { $0.name == "item" }),
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let new = RosterItem(wrap: item, owner: state.jid)
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else { return nil }
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existItems = existItems.filter { $0.jid != new.jid }
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existItems.append(new)
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guard let data = try? JSONEncoder().encode(existItems.map { $0.wrapped }) else { return nil }
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await storage?.setRoster(jid: state.jid, roster: data)
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return .rosterUpdated
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// process get response (.result from server)
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} else if stanza.type == .iq(.get) {
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let items = query.nodes.filter { $0.name == "item" }
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guard let data = try? JSONEncoder().encode(items) else { return nil }
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await storage?.setRoster(jid: state.jid, roster: data)
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return .rosterUpdated
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} else {
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return nil
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}
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}
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}
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// <iq to='testmon3@test.anal.company/TwtWkVOZ3liz' type='result' id='7l899q9r'>
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// <query ver='27' xmlns='jabber:iq:roster'>
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// <item jid='fmodf@conversations.im' subscription='both' xmlns='jabber:iq:roster'/>
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// <item subscription='to' jid='testmon4@test.anal.company' xmlns='jabber:iq:roster'/>
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// </query>
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// </iq>
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