show relative created time on events

Signed-off-by: William Casarin <jb55@jb55.com>

damus/ContentView.swift

@@ -49,8 +49,9 @@ struct ContentView: View {
         ScrollView {
             ForEach(events, id: \.id) { ev in
                 if ev.is_local && timeline == .debug || (timeline == .global && !ev.is_local) || (timeline == .friends && is_friend(ev.pubkey)) {
-                    NavigationLink(destination: EventDetailView(event: ev)) {
-                        EventView(event: ev, profile: profiles[ev.pubkey]?.profile)
+                    let profile: Profile? = profiles[ev.pubkey]?.profile
+                    NavigationLink(destination: EventDetailView(event: ev, profile: profile)) {
+                        EventView(event: ev, profile: profile)
                     }
                     .buttonStyle(PlainButtonStyle())
                 }

damus/TimeAgo.swift

@@ -0,0 +1,46 @@
+//
+//  TimeAgo.swift
+//  damus
+//
+//  Created by William Casarin on 2022-04-16.
+//
+
+import Foundation
+
+public func time_ago_since(_ date: Date) -> String {
+
+    let calendar = Calendar.current
+    let now = Date()
+    let unitFlags: NSCalendar.Unit = [.second, .minute, .hour, .day, .weekOfYear, .month, .year]
+    let components = (calendar as NSCalendar).components(unitFlags, from: date, to: now, options: [])
+
+    if let year = components.year, year >= 1 {
+        return "\(year)yr"
+    }
+
+    if let month = components.month, month >= 1 {
+        return "\(month)mth"
+    }
+
+    if let week = components.weekOfYear, week >= 1 {
+        return "\(week)wk"
+    }
+
+    if let day = components.day, day >= 1 {
+        return "\(day)d"
+    }
+
+    if let hour = components.hour, hour >= 1 {
+        return "\(hour)h"
+    }
+
+    if let minute = components.minute, minute >= 1 {
+        return "\(minute)m"
+    }
+
+    if let second = components.second, second >= 3 {
+        return "\(second)s"
+    }
+
+    return "now"
+}

damus/Views/EventDetailView.swift

@@ -9,14 +9,21 @@ import SwiftUI
 
 struct EventDetailView: View {
     let event: NostrEvent
+    let profile: Profile?
 
     var body: some View {
-        Text("EventDetailView")
+        HStack {
+            VStack {
+                ProfilePicView(picture: profile?.picture, size: 64)
+
+                Spacer()
+            }
+        }
     }
 }
 
 struct EventDetailView_Previews: PreviewProvider {
     static var previews: some View {
-        EventDetailView(event: NostrEvent(content: "Hello", pubkey: "Guy"))
+        EventDetailView(event: NostrEvent(content: "Hello", pubkey: "Guy"), profile: nil)
     }
 }

damus/Views/EventView.swift

@@ -28,7 +28,8 @@ struct EventView: View {
                         .onTapGesture {
                             UIPasteboard.general.string = event.pubkey
                         }
-                        .frame(maxWidth: .infinity, alignment: .leading)
+                    Text("\(format_relative_time(event.created_at))")
+                        .foregroundColor(.gray)
                     Spacer()
                     if (event.pow ?? 0) >= 10 {
                         Text("\(event.pow ?? 0)")
@@ -56,3 +57,8 @@ func calculate_pow_color(_ pow: Int) -> Color
     let x = Double(pow) / 30.0;
     return Color(.sRGB, red: 2.0 * (1.0 - x), green: 2.0 * x, blue: 0, opacity: 0.5)
 }
+
+func format_relative_time(_ created_at: Int64) -> String
+{
+    return time_ago_since(Date(timeIntervalSince1970: Double(created_at)))
+}