61 lines
1.7 KiB
Swift
61 lines
1.7 KiB
Swift
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import Foundation
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import Combine
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/// View model for the presence experience.
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///
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/// Exposes the state the UI needs to render the "am I present?" moment, the
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/// radius tier picker, and the live feed of encounters (silhouettes).
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@MainActor
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final class PresenceViewModel: ObservableObject {
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@Published var isPresent: Bool = false
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@Published var radiusTier: DistanceTier = .rightHere
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@Published private(set) var activeEngines: Set<ProximityEngine> = []
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@Published private(set) var encounters: [Encounter] = []
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@Published private(set) var lastScan: Date?
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private let engine: PresenceEngine
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private var cancellables = Set<AnyCancellable>()
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init(engine: PresenceEngine) {
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self.engine = engine
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engine.$isPresent
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.assign(to: &$isPresent)
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engine.$radiusTier
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.assign(to: &$radiusTier)
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engine.$activeEngines
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.assign(to: &$activeEngines)
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engine.$recentEncounters
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.assign(to: &$encounters)
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engine.$lastScan
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.assign(to: &$lastScan)
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}
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// MARK: - User actions
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func togglePresence() {
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isPresent.toggle()
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Task { await engine.setPresent(isPresent) }
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}
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func setRadius(_ tier: DistanceTier) {
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radiusTier = tier
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Task { await engine.setRadiusTier(tier) }
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}
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/// Send a "wave" to a silhouette — the first step toward mutual reveal.
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func wave(to encounter: Encounter) {
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// In production: POST /v1/wave with the encounter token.
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Task {
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await engine.wave(to: encounter)
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}
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}
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func block(_ encounter: Encounter) {
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Task {
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await engine.block(encounter)
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}
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}
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}
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