Re: [SMARTY] Creating custom loop block function

On Fri, Dec 23, 2005 at 11:19:21AM +0200, Kaloyan Tsvetkov wrote:
> I need some help from someone who's got more experience than me with
> Smarty. I've been tasked to create a set of block functions for
> rendering tables. Here's what the syntax look like:
> 
> ---proba.html---
> 
>        {list data=$rows}
> 
>                {head}
>                        {column}1{/column}
>                        {column}2{/column}
>                        {column}3{/column}
>                {/head}
> 
>                {rows}
>                        {cell}
>                                0. {$SKU} {$data.SKU}
>                        {/cell}
>                        {cell} 0. {$brand} {$data.brand} {/cell}
>                        {cell} 0. {$model} {$data.model} {/cell}
>                {/rows}
>        {/list}
> 
> ---end-of-file---
> 
> The $rows data is somethink like that:
> 
> ---proba.php---
> .....
> 
> $smarty->assign('rows',
>        array(
>                array(
>                        SKU => 1,
>                        brand => 11,
>                        model => 11,
>                         ),
> 
>                array(
>                        SKU => 2,
>                        brand => 22,
>                        model => 22,
>                        ),
>                )
>        );
> 
> ....
> ---end-of-file---
> 
> I need to make the smarty_block_rows() block function loop over the
> data in $rows. In the same time I need to access the elements (SKU,
> brand, model) on each loop. The HTML for the block components are read
> from an external file. If you want to take a look at the code, please
> follow this link: http://kaloyan.info/loop.zip.


you can access the data attribute from the {list} tag within the {row} tags.
you have to search through $smarty->_tag_stack to find the enclosing {list}:

    for ($i = count($smarty->_tag_stack) - 1; $i >= 0; $i--) {
        $tag =& $smarty->_tag_stack[$i];
        if ($tag[0] == 'list') {
            $data = $tag[1]['data'];
            break;
        }
    }

/* if $data is set here, then we found an enclosing {list} that has a
data attribute set */


then you have to loop yourself over the $data by setting $repeat at each call to {row}

/* we use the formerly unused $tag[2] to save the current row's count */
    if (!isset($tag[2])) {
        $tag[2] = 0;
    } else {
        $tag[2]++;
    }
    $i = $tag[2]; /* index of the current element */

    if (isset($data[$i])) {
        /* there are rows left, we assign one
           this row will be used in the next iteration of the block function */
        $smarty->assign('data', $data[$i]); /* if you want to acces {$data.SKU} */
        $smarty->assign($data[$i]);         /* if you want to acces {$SKU} */
        $repeat = true;

    } else {
        /* we looped through $data and are done */
        $repeat = false;

    }

/* always return the block content's output unmodified
   it contains the last iteration's output.
 */
    return $content;
}


HTH
messju

 
> Thanks in advance to all which will provide any help, comment or
> advice.
> 
> K.

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