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"unless" modifier function

 
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kevinreeves
Smarty n00b


Joined: 10 Mar 2004
Posts: 1

PostPosted: Wed Mar 10, 2004 10:53 pm    Post subject: "unless" modifier function Reply with quote

Hi everyone,
I've found myself wanting a way to do a sort of conditional statement
when displaying things like colors around text. I would really like to
use the common "( if true ) ? true : false;" syntax, but there doesn't
seem to be anything analogous in Smarty. So, I've developed this
modifier function that I've called "unless".

unless.php
--------------------------------------------
Code:

function unless( $string, $if, $else )
{
  $condition = "\$ret = ( $if ) ? \$else : \$string;";
  eval( $condition );
  return( $ret );
}


foo.tpl
--------------------------------------------
Code:

<font style="color:{"green"|unless:"$balance < 0":"red"}">
 {$balance}
</font>


The problem that I'm having is in the use of smarty variables in the
params to the unless function ( i.e. $balance ). When that variable is an
associative array, it does not work as I'd like. For example, when it's
used inside of a {foreach} loop:

Code:

{ foreach from=$transactions item=trans }
<font style="color:{"green"|unless:"$trans.balance < 0":"red"}">
 {$trans.balance}
</font>
{ /foreach }


In this example, "$trans.balance" is not passed in as the value of that
array element, but rather as "Array.balance".

I welcome any opinions on how this could be better written. Or, perhaps,
there's a better "Smarty" way to do this.

Thanks,
-- kevin
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mohrt
Administrator


Joined: 16 Apr 2003
Posts: 7368
Location: Lincoln Nebraska, USA

PostPosted: Wed Mar 10, 2004 11:09 pm    Post subject: Reply with quote

{"green"|unless:"$trans.balance < 0":"red"}

{if $trans.balance gte 0}green{else}red{/if}

What are you gaining besides obfuscation?
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