add stubs for subscription handling

app/neighbors.go

@@ -15,32 +15,44 @@ type Neighbors struct {
 	list          ui.List
 	help          string
 	neighbors     []ttbp.User
+	subscriptions *ttbp.Subscriptions
 }
 
 func NewNeighbors() *Neighbors {
 	users := ttbp.SortUsersByRecent(ttbp.GetUsers())
+	subscriptions := ttbp.GetSubscriptions()
 	list := []string{}
 	for _, user := range users {
-		publishDir := ""
-		if user.Publishing {
-			publishDir = fmt.Sprintf("%s%s/%s", ttbp.PathLive, user.Name, user.PublishDir)
-		}
-		list = append(list, fmt.Sprintf(
-			"~%-14s %-15s %-46s",
-			user.Name,
-			"("+humanize.Time(user.LastPublished)+")",
-			publishDir,
-		))
+		list = append(list, formatNeighbor(user, subscriptions))
 	}
 
 	return &Neighbors{
 		title,
 		ui.NewList(list),
-		"↑↓/kj move  ↵ enter  q return",
+		"↑↓/kj move  ↵ enter  s subscribe  q return",
 		users,
+		subscriptions,
 	}
 }
 
+func formatNeighbor(user ttbp.User, subscriptions *ttbp.Subscriptions) string {
+	publishDir := ""
+	if user.Publishing {
+		publishDir = fmt.Sprintf("%s%s/%s", ttbp.PathLive, user.Name, user.PublishDir)
+	}
+	subscribed := " "
+	if subscriptions.IsSubscribed(user) {
+		subscribed = "+"
+	}
+	return fmt.Sprintf(
+		" %s ~%-14s %-15s %-43s",
+		subscribed,
+		user.Name,
+		"("+humanize.Time(user.LastPublished)+")",
+		publishDir,
+	)
+}
+
 func (neighbors *Neighbors) Event(state *ui.State, event vaxis.Event) (processed bool) {
 	if key, ok := event.(vaxis.Key); ok && key.EventType == vaxis.EventPress {
 		switch key.String() {
@@ -59,6 +71,14 @@ func (neighbors *Neighbors) Event(state *ui.State, event vaxis.Event) (processed
 			neighbors.list.SetIndex(i)
 		case "q", "h", "Left":
 			ui.ViewChange <- NewMainMenu()
+		case "s":
+			user := neighbors.neighbors[neighbors.list.Index()]
+			if neighbors.subscriptions.IsSubscribed(user) {
+				neighbors.subscriptions.Unsubscribe(user)
+			} else {
+				neighbors.subscriptions.Subscribe(user)
+			}
+			neighbors.list.SetItem(neighbors.list.Index(), formatNeighbor(user, neighbors.subscriptions))
 		case "Enter", "l", "Right":
 			ui.ViewChange <- NewUserPage(neighbors.neighbors[neighbors.list.Index()].Name)
 		}
@@ -79,5 +99,5 @@ func (neighbors *Neighbors) Draw(state *ui.State) {
 		Width:  80,
 		Height: 10,
 	})
-	win.New(win.Width/2-15, win.Height/2+9, 30, 1).Print(vaxis.Segment{Text: neighbors.help})
+	win.New(win.Width/2-22, win.Height/2+9, 44, 1).Print(vaxis.Segment{Text: neighbors.help})
 }

ttbp/ttbp.go

@@ -137,3 +137,35 @@ func SortPostsByRecent(posts []Post) []Post {
 	})
 	return posts
 }
+
+type Subscriptions struct {
+	users []User
+}
+
+func GetSubscriptions() *Subscriptions {
+	return &Subscriptions{
+		users: []User{},
+	}
+}
+
+func (subscriptions *Subscriptions) IsSubscribed(user User) bool {
+	for _, sub := range subscriptions.users {
+		if sub.Name == user.Name {
+			return true
+		}
+	}
+	return false
+}
+
+func (subscriptions *Subscriptions) Subscribe(user User) {
+	subscriptions.users = append(subscriptions.users, user)
+}
+
+func (subscriptions *Subscriptions) Unsubscribe(user User) {
+	for i, sub := range subscriptions.users {
+		if sub.Name == user.Name {
+			subscriptions.users = append(subscriptions.users[:i], subscriptions.users[i+1:]...)
+			return
+		}
+	}
+}

ui/list.go

@@ -90,6 +90,10 @@ func (m *List) SetItems(items []string) {
 	m.index = min(len(items)-1, m.index)
 }
 
+func (m *List) SetItem(index int, item string) {
+	m.items[index] = item
+}
+
 // Returns the index of the currently selected item.
 func (m *List) Index() int {
 	return m.index