require 'fileutils'
require 'redcloth_for_tex'
require 'parsedate'
require 'zip/zip'
class WikiController < ApplicationController
before_filter :load_page
caches_action :show, :published, :authors, :recently_revised, :list
cache_sweeper :revision_sweeper
layout 'default', :except => [:rss_feed, :rss_with_content, :rss_with_headlines, :tex, :export_tex, :export_html]
def index
if @web_name
redirect_home
elsif not @wiki.setup?
redirect_to :controller => 'admin', :action => 'create_system'
elsif @wiki.webs.length == 1
redirect_home @wiki.webs.values.first.address
else
redirect_to :action => 'web_list'
end
end
# Outside a single web --------------------------------------------------------
def authenticate
if password_check(params['password'])
redirect_home
else
flash[:info] = password_error(params['password'])
redirect_to :action => 'login', :web => @web_name
end
end
def login
# to template
end
def web_list
@webs = wiki.webs.values.sort_by { |web| web.name }
end
# Within a single web ---------------------------------------------------------
def authors
@page_names_by_author = @web.page_names_by_author
@authors = @page_names_by_author.keys.sort
end
def export_html
stylesheet = File.read(File.join(RAILS_ROOT, 'public', 'stylesheets', 'instiki.css'))
export_pages_as_zip('html') do |page|
renderer = PageRenderer.new(page.revisions.last)
rendered_page = <<-EOL
#{page.plain_name} in #{@web.name}
#{renderer.display_content_for_export}
#{page.revisions? ? "Revised" : "Created" } on #{ page.revised_at.strftime('%B %d, %Y %H:%M:%S') }
by
#{ UrlGenerator.new(self).make_link(page.author.name, @web, nil, { :mode => :export }) }
EOL
rendered_page
end
end
def export_markup
export_pages_as_zip(@web.markup) { |page| page.content }
end
def export_pdf
file_name = "#{@web.address}-tex-#{@web.revised_at.strftime('%Y-%m-%d-%H-%M-%S')}"
file_path = File.join(@wiki.storage_path, file_name)
export_web_to_tex "#{file_path}.tex" unless FileTest.exists? "#{file_path}.tex"
convert_tex_to_pdf "#{file_path}.tex"
send_file "#{file_path}.pdf"
end
def export_tex
file_name = "#{@web.address}-tex-#{@web.revised_at.strftime('%Y-%m-%d-%H-%M-%S')}.tex"
file_path = File.join(@wiki.storage_path, file_name)
export_web_to_tex(file_path) unless FileTest.exists?(file_path)
send_file file_path
end
def feeds
@rss_with_content_allowed = rss_with_content_allowed?
# show the template
end
def list
parse_category
@page_names_that_are_wanted = @pages_in_category.wanted_pages
@pages_that_are_orphaned = @pages_in_category.orphaned_pages
end
def recently_revised
parse_category
@pages_by_revision = @pages_in_category.by_revision
@pages_by_day = Hash.new { |h, day| h[day] = [] }
@pages_by_revision.each do |page|
day = Date.new(page.revised_at.year, page.revised_at.month, page.revised_at.day)
@pages_by_day[day] << page
end
end
def rss_with_content
if rss_with_content_allowed?
render_rss(hide_description = false, *parse_rss_params)
else
render_text 'RSS feed with content for this web is blocked for security reasons. ' +
'The web is password-protected and not published', '403 Forbidden'
end
end
def rss_with_headlines
render_rss(hide_description = true, *parse_rss_params)
end
def search
@query = params['query']
@title_results = @web.select { |page| page.name =~ /#{@query}/i }.sort
@results = @web.select { |page| page.content =~ /#{@query}/i }.sort
all_pages_found = (@results + @title_results).uniq
if all_pages_found.size == 1
redirect_to_page(all_pages_found.first.name)
end
end
# Within a single page --------------------------------------------------------
def cancel_edit
@page.unlock
redirect_to_page(@page_name)
end
def edit
if @page.nil?
redirect_home
elsif @page.locked?(Time.now) and not params['break_lock']
redirect_to :web => @web_name, :action => 'locked', :id => @page_name
else
@page.lock(Time.now, @author)
end
end
def locked
# to template
end
def new
# to template
end
def pdf
page = wiki.read_page(@web_name, @page_name)
safe_page_name = @page.name.gsub(/\W/, '')
file_name = "#{safe_page_name}-#{@web.address}-#{@page.revised_at.strftime('%Y-%m-%d-%H-%M-%S')}"
file_path = File.join(@wiki.storage_path, file_name)
export_page_to_tex("#{file_path}.tex") unless FileTest.exists?("#{file_path}.tex")
# NB: this is _very_ slow
convert_tex_to_pdf("#{file_path}.tex")
send_file "#{file_path}.pdf"
end
def print
if @page.nil?
redirect_home
end
@link_mode ||= :show
@renderer = PageRenderer.new(@page.revisions.last)
# to template
end
def published
if not @web.published?
render(:text => "Published version of web '#{@web_name}' is not available", :status => 404)
return
end
@page_name ||= 'HomePage'
@page ||= wiki.read_page(@web_name, @page_name)
render(:text => "Page '#{@page_name}' not found", :status => 404) and return unless @page
@renderer = PageRenderer.new(@page.revisions.last)
end
def revision
get_page_and_revision
@show_diff = (params[:mode] == 'diff')
@renderer = PageRenderer.new(@revision)
end
def rollback
get_page_and_revision
end
def save
render(:status => 404, :text => 'Undefined page name') and return if @page_name.nil?
unless (request.post? || ENV["RAILS_ENV"] == "test")
headers['Allow'] = 'POST'
render(:status => 405, :text => 'You must use an HTTP POST')
return
end
author_name = params['author']
author_name = 'AnonymousCoward' if author_name =~ /^\s*$/
cookies['author'] = { :value => author_name, :expires => Time.utc(2030) }
begin
filter_spam(params['content'])
if @page
wiki.revise_page(@web_name, @page_name, params['content'], Time.now,
Author.new(author_name, remote_ip), PageRenderer.new)
@page.unlock
else
wiki.write_page(@web_name, @page_name, params['content'], Time.now,
Author.new(author_name, remote_ip), PageRenderer.new)
end
redirect_to_page @page_name
rescue => e
flash[:error] = e
logger.error e
flash[:content] = params['content']
if @page
@page.unlock
redirect_to :action => 'edit', :web => @web_name, :id => @page_name
else
redirect_to :action => 'new', :web => @web_name, :id => @page_name
end
end
end
def show
if @page
begin
@renderer = PageRenderer.new(@page.revisions.last)
@show_diff = (params[:mode] == 'diff')
render_action 'page'
# TODO this rescue should differentiate between errors due to rendering and errors in
# the application itself (for application errors, it's better not to rescue the error at all)
rescue => e
logger.error e
flash[:error] = e.message
if in_a_web?
redirect_to :action => 'edit', :web => @web_name, :id => @page_name
else
raise e
end
end
else
if not @page_name.nil? and not @page_name.empty?
redirect_to :web => @web_name, :action => 'new', :id => @page_name
else
render_text 'Page name is not specified', '404 Not Found'
end
end
end
def tex
@tex_content = RedClothForTex.new(@page.content).to_tex
end
protected
def load_page
@page_name = params['id']
@page = @wiki.read_page(@web_name, @page_name) if @page_name
end
private
def convert_tex_to_pdf(tex_path)
# TODO remove earlier PDF files with the same prefix
# TODO handle gracefully situation where pdflatex is not available
begin
wd = Dir.getwd
Dir.chdir(File.dirname(tex_path))
logger.info `pdflatex --interaction=nonstopmode #{File.basename(tex_path)}`
ensure
Dir.chdir(wd)
end
end
def export_page_to_tex(file_path)
tex
File.open(file_path, 'w') { |f| f.write(render_to_string(:template => 'wiki/tex', :layout => false)) }
end
def export_pages_as_zip(file_type, &block)
file_prefix = "#{@web.address}-#{file_type}-"
timestamp = @web.revised_at.strftime('%Y-%m-%d-%H-%M-%S')
file_path = File.join(@wiki.storage_path, file_prefix + timestamp + '.zip')
tmp_path = "#{file_path}.tmp"
Zip::ZipOutputStream.open(tmp_path) do |zip_out|
@web.select.by_name.each do |page|
zip_out.put_next_entry("#{CGI.escape(page.name)}.#{file_type}")
zip_out.puts(block.call(page))
end
# add an index file, if exporting to HTML
if file_type.to_s.downcase == 'html'
zip_out.put_next_entry 'index.html'
zip_out.puts "" +
""
end
end
FileUtils.rm_rf(Dir[File.join(@wiki.storage_path, file_prefix + '*.zip')])
FileUtils.mv(tmp_path, file_path)
send_file file_path
end
def export_web_to_tex(file_path)
@tex_content = table_of_contents(@web.page('HomePage').content, render_tex_web)
File.open(file_path, 'w') { |f| f.write(render_to_string(:template => 'wiki/tex_web', :layout => nil)) }
end
def get_page_and_revision
if params['rev']
@revision_number = params['rev'].to_i
else
@revision_number = @page.revisions.length
end
@revision = @page.revisions[@revision_number - 1]
end
def parse_category
@categories = WikiReference.list_categories(@web).sort
@category = params['category']
if @category
@set_name = "category '#{@category}'"
pages = WikiReference.pages_in_category(@web, @category).sort.map { |page_name| @web.page(page_name) }
@pages_in_category = PageSet.new(@web, pages)
else
# no category specified, return all pages of the web
@pages_in_category = @web.select_all.by_name
@set_name = 'the web'
end
end
def parse_rss_params
if params.include? 'limit'
limit = params['limit'].to_i rescue nil
limit = nil if limit == 0
else
limit = 15
end
start_date = Time.local(*ParseDate::parsedate(params['start'])) rescue nil
end_date = Time.local(*ParseDate::parsedate(params['end'])) rescue nil
[ limit, start_date, end_date ]
end
def remote_ip
ip = request.remote_ip
logger.info(ip)
ip
end
def render_rss(hide_description = false, limit = 15, start_date = nil, end_date = nil)
if limit && !start_date && !end_date
@pages_by_revision = @web.select.by_revision.first(limit)
else
@pages_by_revision = @web.select.by_revision
@pages_by_revision.reject! { |page| page.revised_at < start_date } if start_date
@pages_by_revision.reject! { |page| page.revised_at > end_date } if end_date
end
@hide_description = hide_description
@link_action = @web.password ? 'published' : 'show'
render :action => 'rss_feed'
end
def render_tex_web
@web.select.by_name.inject({}) do |tex_web, page|
tex_web[page.name] = RedClothForTex.new(page.content).to_tex
tex_web
end
end
def rss_with_content_allowed?
@web.password.nil? or @web.published?
end
def truncate(text, length = 30, truncate_string = '...')
if text.length > length then text[0..(length - 3)] + truncate_string else text end
end
def filter_spam(content)
@@spam_patterns ||= load_spam_patterns
@@spam_patterns.each do |pattern|
raise "Your edit was blocked by spam filtering" if content =~ pattern
end
end
def load_spam_patterns
spam_patterns_file = "#{RAILS_ROOT}/config/spam_patterns.txt"
if File.exists?(spam_patterns_file)
File.readlines(spam_patterns_file).inject([]) { |patterns, line| patterns << Regexp.new(line.chomp, Regexp::IGNORECASE) }
else
[]
end
end
end