[dokuwiki] Re: Specifying page template for new pages in URL

Chris Smith wrote:

Jason Grout wrote:


I looked on the events list page at:

http://wiki.splitbrain.org/wiki:events_list
Are you referring to the HTML_EDITFORM_INJECTION or HTML_PAGE_FROMTEMPLATE events? It seems like the HTML_PAGE_FROMTEMPLATE might be an interesting one to look at.
Let me make sure that I understand the event system. I can register a callback function that will be called when the event is triggered. From the documentation and the source in html_edit, it appears that the only information I have to work with in the HTML_PAGE_FROMTEMPLATE is the ID of the page being created. That's not enough for my purposes (I can't necessarily tell what template I want just from the namespace), though it's a start. Is there a way to access the URL parameters from the event callback? I'm sorry if I seem to have a fixation on the URL parameters, but it's the only way I can think of passing the name of a desired template to the create/edit page. 

Thanks,

Jason


Sure,  $_GET['my_var'] !


Okay, it's done.
There's a newpagetemplate action plugin that will look for the "newpagetemplate" parameter in $_REQUEST. If the parameter exists, then the page is loaded as a template, with the substitutions currently offered by the namespace templates. Note that this overrides the namespace template.
I have a quick question about my implementation. In the following, a BEFORE callback is an event handler registered with the BEFORE advisement (sp?), and similarly for an AFTER callback. I implemented the plugin as a BEFORE callback, then manually set the $event->result variable and called $event->preventDefault(). Is that all right to do in a BEFORE callback? The documentation seems to indicate that you should only mess with $event->result in an AFTER callback. However, I'd just as soon not go through the expense of loading the default namespace template if I know I'm overriding it. I suppose I could make two callbacks, one BEFORE and one AFTER, with the BEFORE callback checking the $_REQUEST variable and preventing the default, while the AFTER callback actually loads the page, but that seems wasteful as well.
I've also patched the addnewpage plugin to take advantage of the newpagetemplate functionality. The new syntax is: 

{{NEWPAGE>ns|:newpage:template}}
where the new page template follows the vertical bar. I posted the patch up to the addnewpage plugin discussion area. 

Thanks again for everyone's help!

Jason
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