Module:Navbar

local p = {}
local cfg = mw.loadData('Module:Navbar/configuration')

local function get_title_arg(is_collapsible, template)
 local title_arg = 1
 if is_collapsible then title_arg = 2 end
 if template then title_arg = 'template' end
 return title_arg
end

local function choose_links(template, args)
 -- The show table indicates the default displayed items.
 -- view, talk, edit, hist, move, watch
 -- TODO: Move to configuration.
 local show = {true, true, true, false, false, false}
 if template then
  show[2] = false
  show[3] = false
  local index = {t = 2, d = 2, e = 3, h = 4, m = 5, w = 6,
   talk = 2, edit = 3, hist = 4, move = 5, watch = 6}
  -- TODO: Consider removing TableTools dependency.
  for _, v in ipairs(require ('Module:TableTools').compressSparseArray(args)) do
   local num = index[v]
   if num then show[num] = true end
  end
 end

 local remove_edit_link = args.noedit
 if remove_edit_link then show[3] = false end
 
 return show
 
end

local function add_link(link_description, ul, is_mini, font_style)
 local l
 if link_description.url then
  l = {'[', '', ']'}
 else
  l = {'[[', '|', ']]'}
 end
 ul:tag('li')
  :addClass('nv-' .. link_description.full)
  :wikitext(l[1] .. link_description.link .. l[2])
  :tag(is_mini and 'abbr' or 'span')
   :attr('title', link_description.html_title)
   :cssText(font_style)
   :wikitext(is_mini and link_description.mini or link_description.full)
   :done()
  :wikitext(l[3])
  :done()
end

local function make_list(title_text, has_brackets, displayed_links, is_mini, font_style)
 
 local title = mw.title.new(mw.text.trim(title_text), cfg.title_namespace)
 if not title then
  error(cfg.invalid_title .. title_text)
 end
 local talkpage = title.talkPageTitle and title.talkPageTitle.fullText or ''
 
 -- TODO: Get link_descriptions and show into the configuration module.
 -- link_descriptions should be easier...
 local link_descriptions = {
  { ['mini'] = 'v', ['full'] = 'view', ['html_title'] = 'View this template',
   ['link'] = title.fullText, ['url'] = false },
  { ['mini'] = 't', ['full'] = 'talk', ['html_title'] = 'Discuss this template',
   ['link'] = talkpage, ['url'] = false },
  { ['mini'] = 'e', ['full'] = 'edit', ['html_title'] = 'Edit this template',
   ['link'] = 'Special:EditPage/' .. title.fullText, ['url'] = false },
  { ['mini'] = 'h', ['full'] = 'hist', ['html_title'] = 'History of this template',
   ['link'] = 'Special:PageHistory/' .. title.fullText, ['url'] = false },
  { ['mini'] = 'm', ['full'] = 'move', ['html_title'] = 'Move this template',
   ['link'] = mw.title.new('Special:Movepage'):fullUrl('target='..title.fullText), ['url'] = true },
  { ['mini'] = 'w', ['full'] = 'watch', ['html_title'] = 'Watch this template', 
   ['link'] = title:fullUrl('action=watch'), ['url'] = true }
 }

 local ul = mw.html.create('ul')
 if has_brackets then
  ul:addClass(cfg.classes.brackets)
   :cssText(font_style)
 end
 
 for i, _ in ipairs(displayed_links) do
  if displayed_links[i] then add_link(link_descriptions[i], ul, is_mini, font_style) end
 end
 return ul:done()
 
end

function p._navbar(args)
 
 -- TODO: We probably don't need both fontstyle and fontcolor...
 local font_style = args.fontstyle
 local font_color = args.fontcolor
 local is_collapsible = args.collapsible
 local is_mini = args.mini
 local is_plain = args.plain
 
 local collapsible_class = nil
 if is_collapsible then
  collapsible_class = cfg.classes.collapsible
  if not is_plain then is_mini = 1 end
  if font_color then
   font_style = (font_style or '') .. '; color: ' .. font_color .. ';'
  end
 end
 
 local navbar_style = args.style
 local div = mw.html.create():tag('div')
 div
  :addClass(cfg.classes.navbar)
  :addClass(cfg.classes.plainlinks)
  :addClass(cfg.classes.horizontal_list)
  :addClass(collapsible_class) -- we made the determination earlier
  :cssText(navbar_style)

 if is_mini then div:addClass(cfg.classes.mini) end

 local box_text = (args.text or cfg.box_text) .. ' '
  -- the concatenated space guarantees the box text is separated
 if not (is_mini or is_plain) then
  div
   :tag('span')
    :addClass(cfg.classes.box_text)
    :cssText(font_style)
    :wikitext(box_text)
 end
 
 local template = args.template
 local displayed_links = choose_links(template, args)
 local has_brackets = args.brackets
 local title_arg = get_title_arg(is_collapsible, template)
 local title_text = args[title_arg] or (':' .. mw.getCurrentFrame():getParent():getTitle())
 local list = make_list(title_text, has_brackets, displayed_links, is_mini, font_style)
 div:node(list)

 if is_collapsible then
  local title_text_class
  if is_mini then
   title_text_class = cfg.classes.collapsible_title_mini
  else
   title_text_class = cfg.classes.collapsible_title_full
  end
  div:done()
   :tag('div')
   :addClass(title_text_class)
   :cssText(font_style)
   :wikitext(args[1])
 end
 
 local frame = mw.getCurrentFrame()
 -- hlist -> navbar is best-effort to preserve old Common.css ordering.
 return frame:extensionTag{
  name = 'templatestyles', args = { src = cfg.hlist_templatestyles }
 } .. frame:extensionTag{
  name = 'templatestyles', args = { src = cfg.templatestyles }
 } .. tostring(div:done())
end

function p.navbar(frame)
 return p._navbar(require('Module:Arguments').getArgs(frame))
end

return p