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Rewrite TUI using page-based DSL

Browse Source 
Each BBS screen is now a declarative `page` block. Shared rendering
logic (wiki list, scroll helpers, wiki page opening) lives in a `helpers`
block. The persistent chrome (header bar, sidebar menu, footer) is
defined once in a `chrome` block rendered every frame.

The main flow no longer reaches into runner internals: context flows
through naturally via the updated rubbs `tui` step.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Zsolt Tasnadi
2026-05-11 21:32:42 +02:00
parent 6c9b249a3a
commit 2a4aafd96f
2 changed files with 283 additions and 329 deletions
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4
Gemfile.lock
View File

@@ -1,8 +1,8 @@
GIT
remote: https://git.teletype.hu/tools/rubbs.git
revision: 8a3e38aa25b29575b7038cdab753cad0a126c698
revision: cac10176a25eb5d917f559d4dfb6c7d9c0dc34da
specs:
bbs (0.1.0)
bbs (0.2.0)
artii (~> 2.1)
GEM

608
bbs.rb
View File

@@ -24,33 +24,289 @@ SEP_X = 21
CONT_X = 23
CONT_Y = 3
def fmt_date(iso)
Time.parse(iso.to_s).strftime('%Y-%m-%d')
rescue
iso.to_s
end
MAIN_TUI = BBS::TUI.define do
helpers do
def cont_w = term_cols - CONT_X - 1
def cont_h = term_rows - CONT_Y - 4
def wrap_wiki(text, width)
clean = text.to_s
.gsub(/\[([^\]]+)\]\([^)]+\)/, '\1')
.gsub(/[#*_`~>|\\]/, '')
.gsub(/\r?\n+/, ' ')
.strip
words = clean.split
lines = []
line = +''
words.each do |word|
if line.empty?
line << word
elsif line.length + 1 + word.length <= width
line << ' ' << word
else
lines << line.dup
line = +word
def fmt_date(iso)
Time.parse(iso.to_s).strftime('%Y-%m-%d')
rescue
iso.to_s
end
def wordwrap(text, width)
words = text.to_s
.gsub(/\[([^\]]+)\]\([^)]+\)/, '\1')
.gsub(/[#*_`~>|\\]/, '')
.gsub(/\r?\n+/, ' ')
.strip
.split
lines, line = [], +''
words.each do |w|
if line.empty? then line << w
elsif line.length + 1 + w.length <= width then line << ' ' << w
else lines << line.dup; line = +w
end
end
lines << line unless line.empty?
lines
end
def wiki_list_render(color:, title:)
text c(color, title), x: CONT_X, y: CONT_Y
if @items.empty?
text c(:gray, 'No items found.'), x: CONT_X, y: CONT_Y + 2
return
end
list_h = cont_h - 5
visible = @items[@scroll, list_h] || []
list visible.map { |p| p.title[0, cont_w - 2] },
x: CONT_X, y: CONT_Y + 2,
selected: @item_sel - @scroll, style: :gray, highlight: :white
if (page = @items[@item_sel])
hint = page.description.to_s.strip[0, cont_w]
text c(:gray, hint), x: CONT_X, y: CONT_Y + cont_h - 2 unless hint.empty?
end
text c(:gray, '↑↓ navigate Enter read q back'), x: CONT_X, y: CONT_Y + cont_h
end
def scroll_list_up
return if @item_sel <= 0
@item_sel -= 1
@scroll = @item_sel if @item_sel < @scroll
end
def scroll_list_down
return if @item_sel >= @items.size - 1
@item_sel += 1
list_h = cont_h - 5
@scroll = @item_sel - list_h + 1 if @item_sel >= @scroll + list_h
end
def open_wiki_page(back:)
return unless (page = @items[@item_sel])
@detail = wordwrap(WIKI.content(page.id), cont_w)
@page_header = page.title
@page_meta = "#{fmt_date(page.created_at)} #{WIKI.page_url(page.locale, page.path)}"
@prev_page = back
@scroll = 0
go :page_view
end
end
lines << line unless line.empty?
lines
init do
@menu_sel = 0
@items = []
@item_sel = 0
@scroll = 0
@detail = []
@page_header = ''
@page_meta = ''
@input = ''
@status = ''
@prev_page = nil
end
chrome do
bar y: 1,
content: " TELETYPE BBS │ #{@username} │ #{ONLINE.count} online",
style: :success
list MENU_ITEMS.map { |i| i[0, 15] }, x: 2, y: CONT_Y,
selected: @menu_sel, style: :gray, highlight: :white
(CONT_Y..CONT_Y + cont_h).each { |r| text c(:gray, '│'), x: SEP_X, y: r }
bar y: term_rows,
content: ' ↑↓ Navigate Enter Select q Back/Quit r Refresh',
style: :muted
end
# ── Pages ───────────────────────────────────────────────────────────────────
page :idle do
render do
text c(:gray, 'Navigate with ↑↓, select with Enter'),
x: CONT_X, y: CONT_Y + cont_h / 2
end
key(:up) { @menu_sel = (@menu_sel - 1) % MENU_ITEMS.size }
key(:down) { @menu_sel = (@menu_sel + 1) % MENU_ITEMS.size }
key(:enter) do
case MENU_ITEMS[@menu_sel]
when 'Messages' then go :messages
when 'Post Message' then go :new_msg
when 'Blog Posts' then go :blog
when 'HowTo Guides' then go :howto
when 'Game Catalog' then go :games
when 'Online Users' then go :online
when 'System Info' then go :sysinfo
when 'Exit' then :halt
end
end
key('q') { :halt }
key(:escape) { :halt }
end
page :messages do
enter do
@items = MESSAGES.last(30).map { |m| "#{c(:yellow, m.timestamp)} #{c(:white, m.username)}: #{m.text}" }
@scroll = 0
end
render do
text c(:cyan, '── Message Board ──'), x: CONT_X, y: CONT_Y
(@items[@scroll, cont_h - 2] || []).each_with_index do |line, i|
text line[0, cont_w], x: CONT_X, y: CONT_Y + 2 + i
end
text c(:gray, "#{@items.size} msg(s) ↑↓ scroll q back"),
x: CONT_X, y: CONT_Y + cont_h
end
key(:up) { @scroll = [@scroll - 1, 0].max }
key(:down) { @scroll = [@scroll + 1, [@items.size - (cont_h - 2), 0].max].min }
key('r') { reload }
key('q') { go :idle }
key(:escape) { go :idle }
end
page :new_msg do
enter { @input = ''; @status = '' }
render do
text c(:cyan, '── Post Message ──'), x: CONT_X, y: CONT_Y
text c(:gray, 'Type message and press Enter. Esc cancels.'), x: CONT_X, y: CONT_Y + 2
text c(:white, "#{@username}: #{@input}_"), x: CONT_X, y: CONT_Y + 4
text c(:green, @status), x: CONT_X, y: CONT_Y + 6 unless @status.empty?
end
key(:enter) do
if @input.strip.empty?
@status = 'Message cannot be empty.'
else
MESSAGES.append(@username, @input.strip[0...200])
@status = 'Sent!'
@input = ''
end
end
key(:backspace) { @input.chop! unless @input.empty? }
key(:escape) { go :idle }
printable { |ch| @input << ch if @input.length < 200 }
end
page :blog do
enter { @items = WIKI.list('blog'); @item_sel = 0; @scroll = 0 }
render { wiki_list_render(color: :blue, title: '── Blog Posts ──') }
key(:up) { scroll_list_up }
key(:down) { scroll_list_down }
key(:enter) { open_wiki_page(back: :blog) }
key('r') { reload }
key('q') { go :idle }
key(:escape) { go :idle }
end
page :howto do
enter { @items = WIKI.list('howto'); @item_sel = 0; @scroll = 0 }
render { wiki_list_render(color: :magenta, title: '── HowTo Guides ──') }
key(:up) { scroll_list_up }
key(:down) { scroll_list_down }
key(:enter) { open_wiki_page(back: :howto) }
key('r') { reload }
key('q') { go :idle }
key(:escape) { go :idle }
end
page :page_view do
render do
text c(:cyan, @page_header[0, cont_w]), x: CONT_X, y: CONT_Y
text c(:gray, @page_meta[0, cont_w]), x: CONT_X, y: CONT_Y + 1
(@detail[@scroll, cont_h - 3] || []).each_with_index do |l, i|
text c(:gray, l[0, cont_w]), x: CONT_X, y: CONT_Y + 3 + i
end
text c(:gray, "#{@scroll + 1}/#{@detail.size} ↑↓ scroll q back"),
x: CONT_X, y: CONT_Y + cont_h
end
key(:up) { @scroll = [@scroll - 1, 0].max }
key(:down) { @scroll = [@scroll + 1, [@detail.size - (cont_h - 3), 0].max].min }
key('q') { @scroll = 0; go(@prev_page || :idle) }
key(:escape) { @scroll = 0; go(@prev_page || :idle) }
end
page :games do
enter { @items = CATALOG.fetch; @item_sel = 0 }
render do
text c(:cyan, '── Game Catalog ──'), x: CONT_X, y: CONT_Y
if @items.empty?
text c(:gray, 'No games found.'), x: CONT_X, y: CONT_Y + 2
else
game = @items[@item_sel]
text c(:white, "#{@item_sel + 1}/#{@items.size} #{game.title}"[0, cont_w]),
x: CONT_X, y: CONT_Y + 1
text c(:gray, "#{game.platform} #{game.author}"[0, cont_w]),
x: CONT_X, y: CONT_Y + 2
wordwrap(game.desc.to_s, cont_w).first(cont_h - 10).each_with_index do |l, i|
text c(:gray, l), x: CONT_X, y: CONT_Y + 4 + i
end
badges = []
badges << c(:green, '[▶ Play]') unless game.play_path.empty?
badges << c(:yellow, '[⬇ Download]') unless game.download_path.empty?
badges << c(:blue, '[Source]') unless game.source_path.empty?
badges << c(:magenta, '[Docs]') unless game.docs_path.empty?
text badges.join(' '), x: CONT_X, y: CONT_Y + cont_h - 5
text c(:gray, '↑↓ navigate q back'), x: CONT_X, y: CONT_Y + cont_h
end
end
key(:up) { @item_sel = (@item_sel - 1) % @items.size if @items.any? }
key(:down) { @item_sel = (@item_sel + 1) % @items.size if @items.any? }
key('r') { reload }
key('q') { go :idle }
key(:escape) { go :idle }
end
page :online do
enter { @items = ONLINE.snapshot.sort.map { |_, name| name } }
render do
text c(:yellow, '── Online Users ──'), x: CONT_X, y: CONT_Y
@items.each_with_index do |uname, i|
you = uname == @username ? c(:gray, ' ← you') : ''
text c(:white, uname) + you, x: CONT_X, y: CONT_Y + 2 + i
end
text c(:gray, "#{@items.size} user(s) online q back"),
x: CONT_X, y: CONT_Y + cont_h
end
key('r') { reload }
key('q') { go :idle }
key(:escape) { go :idle }
end
page :sysinfo do
enter do
@items = [
"Online users #{ONLINE.count}",
"Messages #{MESSAGES.count}",
"Wiki https://wiki.teletypegames.org",
"Games API https://teletypegames.org",
"Platform #{RUBY_PLATFORM}",
"Ruby #{RUBY_VERSION}"
]
end
render do
text c(:magenta, '── System Info ──'), x: CONT_X, y: CONT_Y
@items.each_with_index do |row, i|
text c(:gray, row[0, cont_w]), x: CONT_X, y: CONT_Y + 2 + i
end
text c(:gray, 'q back'), x: CONT_X, y: CONT_Y + cont_h
end
key('q') { go :idle }
key(:escape) { go :idle }
end
start :idle
end
BBS.configure do |c|
@@ -64,309 +320,7 @@ BBS.configure do |c|
call { |ctx| ONLINE.add(ctx[:session_id], ctx[:username]) }
call do |ctx, runner|
session = runner.instance_variable_get(:@session)
username = ctx[:username]
session_id = ctx[:session_id]
tui = BBS::TUI.define do
init do
@menu_sel = 0
@state = :idle
@prev_state = :idle
@items = []
@item_sel = 0
@scroll = 0
@detail = []
@page_header = ''
@page_meta = ''
@input = ''
@status = ''
@username = username
@session_id = session_id
end
render do
cont_w = term_cols - CONT_X - 1
cont_h = term_rows - CONT_Y - 4
clear
bar y: 1,
content: " TELETYPE BBS │ #{@username} │ #{ONLINE.count} online",
style: :success
menu_labels = MENU_ITEMS.map { |item| item[0, 15] }
list menu_labels, x: 2, y: CONT_Y, selected: @menu_sel,
style: :gray, highlight: :white
(CONT_Y..CONT_Y + cont_h).each { |r| text c(:gray, '│'), x: SEP_X, y: r }
case @state
when :idle
text c(:gray, 'Navigate with ↑↓, select with Enter'),
x: CONT_X, y: CONT_Y + cont_h / 2
when :messages
text c(:cyan, '── Message Board ──'), x: CONT_X, y: CONT_Y
(@items[@scroll, cont_h - 2] || []).each_with_index do |line, i|
text line[0, cont_w], x: CONT_X, y: CONT_Y + 2 + i
end
text c(:gray, "#{@items.size} msg(s) ↑↓ scroll q back"),
x: CONT_X, y: CONT_Y + cont_h
when :new_msg
text c(:cyan, '── Post Message ──'), x: CONT_X, y: CONT_Y
text c(:gray,'Type message and press Enter. Esc cancels.'),
x: CONT_X, y: CONT_Y + 2
text c(:white, "#{@username}: #{@input}_"), x: CONT_X, y: CONT_Y + 4
text c(:green, @status), x: CONT_X, y: CONT_Y + 6 unless @status.empty?
when :blog, :howto
color = @state == :blog ? :blue : :magenta
hdr = @state == :blog ? '── Blog Posts ──' : '── HowTo Guides ──'
text c(color, hdr), x: CONT_X, y: CONT_Y
if @items.empty?
text c(:gray, 'No items found.'), x: CONT_X, y: CONT_Y + 2
else
list_h = cont_h - 5
visible = @items[@scroll, list_h] || []
labels = visible.map { |p| p.title[0, cont_w - 2] }
list labels, x: CONT_X, y: CONT_Y + 2,
selected: @item_sel - @scroll, style: :gray, highlight: :white
if (page = @items[@item_sel])
hint = page.description.to_s.strip[0, cont_w]
text c(:gray, hint), x: CONT_X, y: CONT_Y + cont_h - 2 unless hint.empty?
end
text c(:gray, '↑↓ navigate Enter read q back'),
x: CONT_X, y: CONT_Y + cont_h
end
when :page_view
text c(:cyan, @page_header[0, cont_w]), x: CONT_X, y: CONT_Y
text c(:gray, @page_meta[0, cont_w]), x: CONT_X, y: CONT_Y + 1
(@detail[@scroll, cont_h - 3] || []).each_with_index do |l, i|
text c(:gray, l[0, cont_w]), x: CONT_X, y: CONT_Y + 3 + i
end
text c(:gray, "#{@scroll + 1}/#{@detail.size} ↑↓ scroll q back"),
x: CONT_X, y: CONT_Y + cont_h
when :games
text c(:cyan, '── Game Catalog ──'), x: CONT_X, y: CONT_Y
if @items.empty?
text c(:gray, 'No games found.'), x: CONT_X, y: CONT_Y + 2
else
game = @items[@item_sel]
text c(:white, "#{@item_sel + 1}/#{@items.size} #{game.title}"[0, cont_w]),
x: CONT_X, y: CONT_Y + 1
text c(:gray, "#{game.platform} #{game.author}"[0, cont_w]),
x: CONT_X, y: CONT_Y + 2
wrap_wiki(game.desc.to_s, cont_w).first(cont_h - 10).each_with_index do |l, i|
text c(:gray, l), x: CONT_X, y: CONT_Y + 4 + i
end
badges = []
badges << c(:green, '[▶ Play]') unless game.play_path.empty?
badges << c(:yellow, '[⬇ Download]') unless game.download_path.empty?
badges << c(:blue, '[Source]') unless game.source_path.empty?
badges << c(:magenta, '[Docs]') unless game.docs_path.empty?
text badges.join(' '), x: CONT_X, y: CONT_Y + cont_h - 5
text c(:gray, "↑↓ navigate q back"), x: CONT_X, y: CONT_Y + cont_h
end
when :online
text c(:yellow, '── Online Users ──'), x: CONT_X, y: CONT_Y
@items.each_with_index do |uname, i|
you = uname == @username ? c(:gray, ' ← you') : ''
text c(:white, uname) + you, x: CONT_X, y: CONT_Y + 2 + i
end
text c(:gray, "#{@items.size} user(s) online q back"),
x: CONT_X, y: CONT_Y + cont_h
when :sysinfo
text c(:magenta, '── System Info ──'), x: CONT_X, y: CONT_Y
@items.each_with_index do |row, i|
text c(:gray, row[0, cont_w]), x: CONT_X, y: CONT_Y + 2 + i
end
text c(:gray, 'q back'), x: CONT_X, y: CONT_Y + cont_h
end
bar y: term_rows, content: ' ↑↓ Navigate Enter Select q Back/Quit r Refresh',
style: :muted
end
# ── Navigation ────────────────────────────────────────────────────────
key(:up) do
case @state
when :blog, :howto
if @item_sel > 0
@item_sel -= 1
@scroll = @item_sel if @item_sel < @scroll
end
when :games
@item_sel = (@item_sel - 1) % @items.size if @items.any?
when :messages
@scroll = [@scroll - 1, 0].max
when :page_view
@scroll = [@scroll - 1, 0].max
else
@menu_sel = (@menu_sel - 1) % MENU_ITEMS.size
end
end
key(:down) do
case @state
when :blog, :howto
if @item_sel < @items.size - 1
@item_sel += 1
list_h = (term_rows - CONT_Y - 4) - 5
@scroll = @item_sel - list_h + 1 if @item_sel >= @scroll + list_h
end
when :games
@item_sel = (@item_sel + 1) % @items.size if @items.any?
when :messages
cont_h = term_rows - CONT_Y - 4
max = [@items.size - (cont_h - 2), 0].max
@scroll = [@scroll + 1, max].min
when :page_view
cont_h = term_rows - CONT_Y - 4
max = [@detail.size - (cont_h - 3), 0].max
@scroll = [@scroll + 1, max].min
else
@menu_sel = (@menu_sel + 1) % MENU_ITEMS.size
end
end
key(:enter) do
if @state == :new_msg
if @input.strip.empty?
@status = 'Message cannot be empty.'
else
MESSAGES.append(@username, @input.strip[0...200])
@status = 'Sent!'
@input = ''
end
elsif (@state == :blog || @state == :howto) && @items[@item_sel]
page = @items[@item_sel]
body = WIKI.content(page.id)
@detail = wrap_wiki(body, term_cols - CONT_X - 1)
@page_header = page.title
@page_meta = "#{fmt_date(page.created_at)} #{WIKI.page_url(page.locale, page.path)}"
@prev_state = @state
@scroll = 0
@state = :page_view
else
case MENU_ITEMS[@menu_sel]
when 'Messages'
@items = MESSAGES.last(30).map do |m|
"#{c(:yellow, m.timestamp)} #{c(:white, m.username)}: #{m.text}"
end
@scroll = 0
@state = :messages
when 'Post Message'
@input = ''
@status = ''
@state = :new_msg
when 'Blog Posts'
@items = WIKI.list('blog')
@item_sel = 0
@scroll = 0
@state = :blog
when 'HowTo Guides'
@items = WIKI.list('howto')
@item_sel = 0
@scroll = 0
@state = :howto
when 'Game Catalog'
@items = CATALOG.fetch
@item_sel = 0
@state = :games
when 'Online Users'
@items = ONLINE.snapshot.sort.map { |_, name| name }
@state = :online
when 'System Info'
@items = [
"Online users #{ONLINE.count}",
"Messages #{MESSAGES.count}",
"Wiki https://wiki.teletypegames.org",
"Games API https://teletypegames.org",
"Platform #{RUBY_PLATFORM}",
"Ruby #{RUBY_VERSION}"
]
@state = :sysinfo
when 'Exit'
:halt
end
end
end
key(:escape) do
if @state == :idle
:halt
elsif @state == :page_view
@scroll = 0
@state = @prev_state
nil
else
@state = :idle
nil
end
end
key('q') do
if @state == :new_msg
@input << 'q' if @input.length < 200
nil
elsif @state == :idle
:halt
elsif @state == :page_view
@scroll = 0
@state = @prev_state
nil
else
@state = :idle
nil
end
end
key('r') do
if @state == :new_msg
@input << 'r' if @input.length < 200
nil
else
case @state
when :messages
@items = MESSAGES.last(30).map do |m|
"#{c(:yellow, m.timestamp)} #{c(:white, m.username)}: #{m.text}"
end
@scroll = 0
when :online
@items = ONLINE.snapshot.sort.map { |_, name| name }
when :blog
@items = WIKI.list('blog'); @item_sel = 0; @scroll = 0
when :howto
@items = WIKI.list('howto'); @item_sel = 0; @scroll = 0
when :games
@items = CATALOG.fetch; @item_sel = 0
end
nil
end
end
key(:backspace) do
@input.chop! if @state == :new_msg && !@input.empty?
end
(' '..'~').each do |ch|
next if ch == 'q' || ch == 'r'
key(ch) do
@input << ch if @state == :new_msg && @input.length < 200
end
end
end
BBS::TUIRunner.new(session, session_id, tui).run
end
tui MAIN_TUI
say 'Goodbye!', style: :muted
end