spb/prisme Public MIT

1//2//  TabStore.swift3//  Prisme4//5//  Author: Simon-Pierre Boucher <contact@spboucher.ai>6//78import Foundation9import Observation1011/// Ordered collection of open tabs plus the active selection.12/// Grouping by intention (P0) will layer on top of this later — the store13/// itself stays a dumb, predictable list.14@MainActor15@Observable16final class TabStore {17    private(set) var tabs: [Tab] = []18    var activeTabID: Tab.ID?1920    var activeTab: Tab? {21        guard let id = activeTabID else { return nil }22        return tabs.first { $0.id == id }23    }2425    func tabs(in containerID: IdentityContainer.ID) -> [Tab] {26        tabs.filter { $0.containerID == containerID }27    }2829    func mostRecentTab(in containerID: IdentityContainer.ID) -> Tab? {30        tabs(in: containerID).max { $0.lastActivatedAt < $1.lastActivatedAt }31    }3233    @discardableResult34    func open(_ url: URL?, in containerID: IdentityContainer.ID, activate: Bool = true) -> Tab {35        let tab = Tab(initialURL: url, containerID: containerID)36        tabs.append(tab)37        if activate {38            self.activate(tab)39        }40        return tab41    }4243    func activate(_ tab: Tab) {44        tab.lastActivatedAt = Date()45        activeTabID = tab.id46    }4748    func close(_ tab: Tab) {49        guard let index = tabs.firstIndex(where: { $0.id == tab.id }) else { return }50        tabs.remove(at: index)51        guard activeTabID == tab.id else { return }52        // Prefer a neighbour from the same container, else none.53        let siblings = tabs(in: tab.containerID)54        activeTabID = siblings.last?.id55    }56}57