How can I add an image to every page?

Hi *

I'm new to foswiki, discovering and enjoying it. I looks limitless. I wanted to start making extensions, and for starters, I tried with what I thought it would be a simple one.

I wanted insert an image in every page, even new pages. For every page, the image should be http://something.org/image/_the_name_of_the_foswiki_page. If the image is not found, then nothing should be added.

(the whole story is: I have a network monitoring system, that serves graphs via http. I would like to have a foswiki where I can write about the servers/services monitored, and have the graph as the first element in every server/service monitored. So If I go to http://something/foswiki/Main/yahoo_ping_lost, I want http://something/images/yahoo_ping_lost as the first item in the page ).

I would like to avoid having to put a macro every time I start a new page, so I think I have to use a callback. But I'm not really sure where. I read some plugins, but I don't understand them completely.

Can anyone point me to a plugin on which I can base mine, or maybe tell me the best way to insert the image? Any pointer or idea is much appreciated.

Thanks for foswiki, -- Diego

---

One way to do this is with a custom view template. This can be set manually for a topic or web by adding: (Commented here with the #)

* #Set VIEW_TEMPLATE = MyView

The view template then contains the <img tag to insert the image based upon the topic name. the "MyView" corresponds to a topic named MyViewTemplate ... note that the template suffix is omitted. This topic would contain:

%TMPL:INCLUDE{"view"}%

%TMPL:DEF{"content"}%
<img alt="" src="%PUBURL%/images/%TOPIC%" />
%TEXT%

%TMPL:END%

Unfortunately this is absolute and will result in a broken image if the file is not available.

If the topics have a form attached, you can also use the AutoViewTemplatePlugin to automatically associate an alternate view with a topic based upon the attached form. That's how the Foswiki Extensions and Tasks web applications work.

-- GeorgeClark - 21 Jul 2011