simplex-chat/apps/ios/Shared/Views/Chat/ChatItem/CIFeaturePreferenceView.swift

//
//  CIFeaturePreferenceView.swift
//  SimpleX (iOS)
//
//  Created by Evgeny on 21/12/2022.
//  Copyright © 2022 SimpleX Chat. All rights reserved.
//
// Spec: spec/client/chat-view.md

import SwiftUI
import SimpleXChat

// Spec: spec/client/chat-view.md#CIFeaturePreferenceView
struct CIFeaturePreferenceView: View {
    @ObservedObject var chat: Chat
    @EnvironmentObject var theme: AppTheme
    @Environment(\.terminalLayout) private var terminal
    var chatItem: ChatItem
    var feature: ChatFeature
    var allowed: FeatureAllowed
    var param: Int?

    var body: some View {
        ChatEventWithMeta(chatItem: chatItem) { ts in
            HStack(alignment: .center, spacing: 4) {
                Image(systemName: feature.icon)
                    .foregroundColor(theme.colors.secondary)
                    .scaleEffect(feature.iconScale)
                    .if(terminal) { $0.frame(height: 0) }
                if let ct = chat.chatInfo.contact,
                   allowed != .no && ct.allowsFeature(feature) && !ct.userAllowsFeature(feature) {
                    let setParam = feature == .timedMessages && ct.mergedPreferences.timedMessages.userPreference.preference.ttl == nil
                    featurePreferenceView(acceptText: setParam ? "Set 1 day" : "Accept", ts: ts)
                        .simultaneousGesture(TapGesture().onEnded {
                            allowFeatureToContact(ct, feature, param: setParam ? 86400 : nil)
                        })
                } else {
                    featurePreferenceView(ts: ts)
                }
            }
            .if(terminal) { $0.modifier(terminalLineBox(UIFont.preferredFont(forTextStyle: .caption1), theme.colors.secondary, theme)) }
            .padding(terminal ? terminalEventPadding : EdgeInsets(top: 0, leading: 6, bottom: 6, trailing: 0))
            .textSelection(.disabled)
        }
    }

    private func featurePreferenceView(acceptText: LocalizedStringKey? = nil, ts: Text) -> some View {
        var r = Text(CIContent.preferenceText(feature, allowed, param) + "  ")
            .fontWeight(.light)
            .foregroundColor(theme.colors.secondary)
        if let acceptText {
            r = r
            + Text(acceptText)
                .fontWeight(.medium)
                .foregroundColor(theme.colors.primary)
            + Text(verbatim: "  ")
        }
        r = r + ts
            .fontWeight(.light)
            .foregroundColor(theme.colors.secondary)
        return r.font(.caption)
    }
}

func allowFeatureToContact(_ contact: Contact, _ feature: ChatFeature, param: Int? = nil) {
    Task {
        do {
            let prefs = contactUserPreferencesToPreferences(contact.mergedPreferences).setAllowed(feature, param: param)
            if let toContact = try await apiSetContactPrefs(contactId: contact.contactId, preferences: prefs) {
                await MainActor.run {
                    ChatModel.shared.updateContact(toContact)
                }
            }
        } catch {
            logger.error("allowFeatureToContact apiSetContactPrefs error: \(responseError(error))")
        }
    }
}

struct CIFeaturePreferenceView_Previews: PreviewProvider {
    static var previews: some View {
        let content = CIContent.rcvChatPreference(feature: .timedMessages, allowed: .yes, param: 30)
        let chatItem = ChatItem(
            chatDir: .directRcv,
            meta: CIMeta.getSample(1, previewDate, content.text, .rcvRead),
            content: content,
            quotedItem: nil,
            file: nil
        )
        CIFeaturePreferenceView(chat: Chat.sampleData, chatItem: chatItem, feature: ChatFeature.timedMessages, allowed: .yes, param: 30)
    }
}