wip

..next step would be to support inserting a tiddler with tiddler=
instead of title, and without the pre elemenent.

#83

rails/lib/tw_file.rb

@@ -23,12 +23,10 @@ def self.from_file(file_name)
  # We can't be certain, but we can sanity check a few things to
  # confirm that it at least looks like a legitimate TiddlyWiki
  def looks_valid?
- # The application name is present
- tiddlywiki_title == 'TiddlyWiki' &&
- # Has one or other store divs but not both
- (store.present? ^ encrypted_store.present?) &&
- # We're able to extract a tiddlywiki version
- tiddlywiki_version.present?
+ # Has one or other store divs but not both
+ (store.present? ^ encrypted_store.present?) &&
+ # We're able to extract a tiddlywiki version
+ tiddlywiki_version.present?
  end
 
  def is_classic?
@@ -61,6 +59,8 @@ def tiddlywiki_title_tw5
 
  def tiddlywiki_version_area
  doc.at_xpath("/html/head/script[@id='versionArea']").presence
+ # For older tiddlywikis the script tag doesn't have the id
+ doc.at_xpath("/html/head/script").presence
  end
 
  def tiddlywiki_version_classic
@@ -116,15 +116,21 @@ def insert_or_replace(title, data, shadow)
  if existing_tiddler = tiddler(title, shadow)
  existing_tiddler.replace(tiddler_div)
  else
- (shadow ? shadow_store : store) << tiddler_div
+ choose_store(shadow) << tiddler_div
  end
  end
 
+ def choose_store(shadow)
+ # Old versions of TiddlyWiki classic don't have a shadow store.
+ # For those we'll just use the regular store.
+ shadow ? (shadow_store || store) : store
+ end
+
  def tiddler(title, shadow=false)
  return if encrypted?
 
  # TODO: See how this works for titles with quotes in them
- tiddler_divs = (shadow ? shadow_store : store).xpath("div[@title='#{title}']")
+ tiddler_divs = choose_store(shadow).xpath("div[@title='#{title}']")
  raise 'Multiple tiddlers found!' if tiddler_divs.length > 1
  tiddler_divs.first
  end