Implemented first usable draft for #10

system/discourse/discourse.go

@@ -259,21 +259,24 @@ func (sys *System) LoadPost(p *post.Post) error {
 	// first 20 posts otherwise.
 	p.TotalReplies = len(item.PostStream.Stream)
 	if p.TotalReplies > 20 {
+		var postIDs []int
+
 		if p.CurrentRepliesStartIDX == -1 ||
 			// Explain to me standard GoFmt logic:
 			p.CurrentRepliesStartIDX > (p.TotalReplies-20) {
 			p.CurrentRepliesStartIDX = (p.TotalReplies - 20)
 			// /)_-)
+		} else if p.CurrentRepliesStartIDX < -1 {
+			p.CurrentRepliesStartIDX = 0
 		}
 
-		var postIDs []int
 		if p.CurrentRepliesStartIDX > 0 {
 			postIDs = append(postIDs,
 				item.PostStream.Stream[0])
 			p.CurrentRepliesStartIDX++
 		}
 		postIDs = append(postIDs,
-			item.PostStream.Stream[p.CurrentRepliesStartIDX:]...)
+			item.PostStream.Stream[p.CurrentRepliesStartIDX:(p.CurrentRepliesStartIDX+20)]...)
 
 		replies, err := sys.client.Topics.ShowPosts(
 			context.Background(),

system/hackernews/hackernews.go

@@ -223,7 +223,10 @@ func (sys *System) ListPosts(forumID string) ([]post.Post, error) {
 				SysIDX: sys.ID,
 			},
 
-			Replies: replies,
+			// TODO: Implement chunks loading
+			TotalReplies:           0,
+			CurrentRepliesStartIDX: -1,
+			Replies:                replies,
 
 			URL: fmt.Sprintf("https://news.ycombinator.com/item?id=%d", i.ID),
 

system/lemmy/lemmy.go

@@ -202,6 +202,10 @@ func (sys *System) ListPosts(forumID string) ([]post.Post, error) {
 				SysIDX: sys.ID,
 			},
 
+			// TODO: Implement chunks loading
+			TotalReplies:           0,
+			CurrentRepliesStartIDX: -1,
+
 			URL: fmt.Sprintf("%s/post/%d", baseURL, i.Post.ID),
 
 			SysIDX: sys.ID,

system/lobsters/lobsters.go

@@ -182,6 +182,10 @@ func (sys *System) ListPosts(forumID string) ([]post.Post, error) {
 				SysIDX: sys.ID,
 			},
 
+			// TODO: Implement chunks loading
+			TotalReplies:           0,
+			CurrentRepliesStartIDX: -1,
+
 			URL: i.ShortIDURL,
 
 			SysIDX: sys.ID,

ui/windows/postshow/handlers.go

@@ -109,6 +109,16 @@ func handleOpen(mi interface{}) (bool, []tea.Cmd) {
 	return true, cmds
 }
 
+func handleOlder(mi interface{}) (bool, []tea.Cmd) {
+	var m *Model = mi.(*Model)
+	var cmds []tea.Cmd
+
+	m.activePost.CurrentRepliesStartIDX -= 20
+	m.ctx.Loading = true
+	cmds = append(cmds, m.loadPost(m.activePost))
+	return true, cmds
+}
+
 func handleNumberKeys(mi interface{}, n int8) (bool, []tea.Cmd) {
 	var m *Model = mi.(*Model)
 	var cmds []tea.Cmd

ui/windows/postshow/postshow.go

@@ -63,6 +63,7 @@ func NewModel(c *ctx.Ctx) Model {
 
 	m.tk.KeymapAdd("reply", "reply (prefix with #, e.g. '2r')", "r")
 	m.tk.KeymapAdd("open", "open", "o")
+	m.tk.KeymapAdd("older", "older replies", "z")
 
 	m.a, _ = aggregator.New(m.ctx)
 
@@ -77,6 +78,10 @@ func NewModel(c *ctx.Ctx) Model {
 				ID:      "open",
 				Handler: handleOpen,
 			},
+			{
+				ID:      "older",
+				Handler: handleOlder,
+			},
 		},
 		OnAnyNumberKey:      handleNumberKeys,
 		OnAnyUncaughtKey:    handleUncaughtKeys,

ui/windows/postshow/view.go

@@ -71,6 +71,10 @@ func (m *Model) renderViewport(p *post.Post) string {
 
 	caps := (*m.ctx.Systems[p.SysIDX]).GetCapabilities()
 	if caps.IsCapableOf("list:replies") {
+		if m.activePost.CurrentRepliesStartIDX > 0 {
+			tmp, _ := m.glam.Render(fmt.Sprintf("\n---\nOlder replies available, press `z` to load\n\n---\n"))
+			out += tmp
+		}
 		out += m.renderReplies(0, p.Author.Name, &p.Replies)
 	}