Older classic TiddlyWikis are not considered "valid"

[simonbaird]

Some of the methods used to "validate" a TiddlyWiki classic fail for TiddlyWikis older than a certain date.

Not sure what the version is but it's between 2.1.2 and 2.5.0.

This is only an impact for users who upload an old site. Creating a new "classic" site gets you 2.9.2.

The reason is because <script id="versionArea"> doesn't exist.

[simonbaird]

This might be a wontfix.

As well as the versionArea differences, there's some more incompatibilities.

Some things I learned about the older classic TiddlyWikis (I'm looking at http://simon.tiddlyspot.com/ FYI).

1. The tidders themselves are formatted differently:

    <div tiddler="..." ...><pre>
      ...content with line breaks...
    </pre></div>

vs

    <div title="..." ...>...content with escaped line breaks...</div>

2. There is no div#shadowArea.

1 in particular makes the injection of the ThostUploadPlugin not work. It gets added, but it's not recognized by TiddlyWiki.

We could write some more code to detect the tiddler format, and handle it correctly, but maybe it's not worth the effort.

Effectively we'd need to support three types of TiddlyWiki:

• TW5
• "Classic-newer"
• "Classic-older"

[simonbaird]

I'm not sure how much demand there is for supporting TiddlyWikis from 2006 on TiddlyHost.

Perhaps "Classic-older" can remain unsupported.

[simonbaird]

As a workaround, I think probably "Classic newer" supports importing tiddlers from a "Classic older" file. This could be documented, or at least hinted at.

[simonbaird]

Another blocker to supporting these is that the plugin doesn't work. For example doHttp is not defined. So we'd need an older compatible version of that as well.