Imported From: http://groups.google.com/group/in-portal-dev/browse_thread/thread/491c4eda9652a891#
Routing is a way for application decide what content to show based on
provided request data:
- url
- headers
- form data
It is implemented in one or another form in all major frameworks, like:
Symphony, Zend Framework.
Right now in 5.1.x and 5.2.0-B3 we have rewrite listeners concept. It's a
method inside event handler class, that knows how to build/parse urls.
There are several problems that needs to be solved in current
implementation:
- small build/parse methods are located in usually big class (event
handler) and just to build/parse url you create that class instance and eat
lot of memory
- no way to create custom url caching key, since rewrite listeners don't
put custom data into caching key
- rewrite listeners always create kModRewriteHelper class instance to
use common function for url processing
- if you need to pass some custom parameter to rewrite builder to build
a valid link (e.g. filename), then you need to create 2 copies of code
- in event handler: to ensure correct link after executing event on
item detail page
- in tag processor: to ensure correct link when printing a list of
items
I'm proposing to create base class *kRouter *with these methods:
1. build(...) - builds an url
2. parse(...) - parses an url
3. getLinkParams($object) - returns extra url parameters, extracted from
object, that are required to successfully build a link
4. processParams(&$params) - get parameters, associated with given unit
and remove it from global scope (like kModRewriteHelper::getProcessedParams
method now)
5. patchCachingKey($caching_key) - get caching key as input and return
patched version (allows to put header values into caching key, used to
cache parsed url)
Then in unit config you can register router using this code:
'RouterClass' => Array ('class' => 'WidgetRouter', 'file' =>
'widget_router.php', 'build_event' => 'OnBuild'),
And class, who right now processes all that stuff called kRewriteProcessor
would be renamed to kRoutingManager (maybe not a first) to make it all
sound good.
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Best Regards,