damus

nostr ios client
git clone git://jb55.com/damus
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FollowButtonView.swift (3314B)

      1 //
      2 //  FollowButtonView.swift
      3 //  damus
      4 //
      5 //  Created by William Casarin on 2022-05-16.
      6 //
      7 
      8 import SwiftUI
      9 
     10 struct FollowButtonView: View {
     11     
     12     @Environment(\.colorScheme) var colorScheme
     13     
     14     let target: FollowTarget
     15     let follows_you: Bool
     16     @State var follow_state: FollowState
     17     
     18     var body: some View {
     19         Button {
     20             follow_state = perform_follow_btn_action(follow_state, target: target)
     21         } label: {
     22             Text(verbatim: "\(follow_btn_txt(follow_state, follows_you: follows_you))")
     23                 .frame(width: 105, height: 30)
     24                 //.padding(.vertical, 10)
     25                 .font(.caption.weight(.bold))
     26                 .foregroundColor(follow_state == .unfollows ? filledTextColor() : borderColor())
     27                 .background(follow_state == .unfollows ?  fillColor() : emptyColor())
     28                 .cornerRadius(20)
     29                 .overlay {
     30                     RoundedRectangle(cornerRadius: 16)
     31                         .stroke(follow_state == .unfollows ? .clear : borderColor(), lineWidth: 1)
     32                 }
     33         }
     34         .onReceive(handle_notify(.followed)) { follow in
     35             guard case .pubkey(let pk) = follow,
     36                   pk == target.pubkey else { return }
     37 
     38             self.follow_state = .follows
     39         }
     40         .onReceive(handle_notify(.unfollowed)) { unfollow in
     41             guard case .pubkey(let pk) = unfollow,
     42                   pk == target.pubkey else { return }
     43 
     44             self.follow_state = .unfollows
     45         }
     46     }
     47     
     48     func filledTextColor() -> Color {
     49         colorScheme == .light ? DamusColors.white : DamusColors.black
     50     }
     51     
     52     func fillColor() -> Color {
     53         colorScheme == .light ? DamusColors.black : DamusColors.white
     54     }
     55     
     56     func emptyColor() -> Color {
     57         Color.black.opacity(0)
     58     }
     59     
     60     func borderColor() -> Color {
     61         colorScheme == .light ? DamusColors.darkGrey : DamusColors.lightGrey
     62     }
     63 }
     64 
     65 struct FollowButtonPreviews: View {
     66     let target: FollowTarget = .pubkey(test_pubkey)
     67     var body: some View {
     68         VStack {
     69             Text(verbatim: "Unfollows")
     70             FollowButtonView(target: target, follows_you: false, follow_state: .unfollows)
     71             
     72             Text(verbatim: "Following")
     73             FollowButtonView(target: target, follows_you: false, follow_state: .following)
     74            
     75             Text(verbatim: "Follows")
     76             FollowButtonView(target: target, follows_you: false, follow_state: .follows)
     77             
     78             Text(verbatim: "Follows")
     79             FollowButtonView(target: target, follows_you: true, follow_state: .follows)
     80             
     81             Text(verbatim: "Unfollowing")
     82             FollowButtonView(target: target, follows_you: false, follow_state: .unfollowing)
     83         }
     84     }
     85 }
     86 
     87 struct FollowButtonView_Previews: PreviewProvider {
     88     static var previews: some View {
     89         FollowButtonPreviews()
     90     }
     91 }
     92 
     93 func perform_follow_btn_action(_ fs: FollowState, target: FollowTarget) -> FollowState {
     94     switch fs {
     95     case .follows:
     96         notify(.unfollow(target))
     97         return .following
     98     case .following:
     99         return .following
    100     case .unfollowing:
    101         return .following
    102     case .unfollows:
    103         notify(.follow(target))
    104         return .unfollowing
    105     }
    106 }
    107