Re: Re: Package proposal: Payment_Exchange

Marshall Roch wrote:

Alan Knowles wrote:

I'd turn the thing into a factory patern - defaulting to euro central bank.

I've never even heard of "factory patterns" before. I just looked quickly on Google and found something[1] describing "abstract factory patterns" using PEAR DB as an example, talking about how you call DB::connect('mysql') and it creates a DB_mysql object. Is that what you're referring to?

have a look at Image_Transform, DB etc. class base { function factory($driver) { $class = 'base_'.$driver; include_once 'base/'.$driver.'.php' return new $class; } .. standard methods.... } class base_adriver extends base { .. override driver specific methods. }

How would more drivers be installed? I see this as a good use of subpackages. since drivers are not loaded unless needed.. - and are relatively small, moving to subpackages is not usually necessary.

If someone wanted to write a driver for 'mybank,' but

'mybank' was an Access database (I found some of those),

It would be nice to see someone write bindings to mdbtools for that :) then you'd

probably want to add a dependency on DB.

Imagine in Asia or the US - it's going to be alot better to query a local source... (which may provide the data in a different format)

I'm in the US and the speeds aren't bad across my host's dual-OC12s, but I agree and will work on that. :)

Someone may want to write a driver to do factory('mybank') and get real rates....

What do you mean by "real rates"? The code mentions that you should not rely on the rates for shopping carts etc...

-- Marshall Roch [1] http://www.horde.org/papers/kongress2002-design_patterns/8_abstractfactory.xml.html

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