Comments on: MODx Evolution: Creating a Simple Custom Snippet Part 3 – MODx API, Placeholders, Chunks

By: Abner

Abner — Tue, 08 Feb 2011 02:32:22 +0000

Hi Mary! I found a solution and as I told you,here it goes in case you would like to look at it:
Chunk: myrssChunk

<li class=”feedfetcher”><a class=’feedfetcher’
href=”[+fflink+]”
title=’[+fftitle+]‘>[+fftitle+]</a></li>

Chunk: rssOutTpl

Snippets
[!RSSFetchFeed!]
$RSSFetchFeed_base =
$modx->config['base_path'].’assets/snippets/RSSFetchFeed/’;
include_once $RSSFetchFeed_base . ‘RSSFetchFeed.inc.php’;
if (class_exists(‘RSSFeed’))
$rss = new RSSFeed;
else
return ‘La clase no existe’;
// limit existe?
$limit = (isset($limit))? $limit : 10;
// Se definió chunk CSS o uso el default?
//default parameter values
$cssStyle = (isset($cssChunk)) ? $modx->getChunk($cssChunk) :
file_get_contents($RSSFetchFeed_base.’Defaultstyle.css’);
$tplChunk = (!isset($tplChunk)) ? ‘rssfeedFetchertpl’: $tplChunk ;
$outTpl = isset($outTpl) ? $outTpl : ”;
//Inject the CSS code into the head section
$modx->regClientCSS($cssStyle);

// Argumento URL?
if (isset($URL))
    {
        $URL=
str_replace(array(‘|xq|’,'|xe|’,'|xa|’), array(‘?’,'=’,'&’), $URL);
        $output=$rss->FetchFeed($URL,
$limit, $tplChunk,$outTpl);
    }
else
    $output = ‘y la URL?’;
return $output;
?>

RSSFetchFeed.inc.php
class RSSFeed {
    function fetchFeed($feed_url,$limit,$Chunk,$outTpl)
    {
         global $modx;
        //create a variable to hold the
output
        $output = ”;

        //retrieve file and return as
string
        $content =
file_get_contents($feed_url);

        try {
            //all is good,
we parse the feed
            $feeditems =
new SimpleXMLElement($content);//
            //iterate over
item in the channel and get the title of each item
            $i=0;
            $rowOutput =
”;

foreach($feeditems->channel->item as $entry){

    if($i<$limit){


$modx->setPlaceholder(“fftitle”, $entry->title);


$modx->setPlaceholder(“fflink”, $entry->link);

        $rowOutput .=
$modx->parseChunk($Chunk, $modx->placeholders, ‘[+', '+]‘);

    }

    $i++;

    }
            if(!$outTpl)

    $output = $rowOutput;
            else

    {


$modx->setPlaceholder(‘rows’,$rowOutput);

        $output =
$modx->parseChunk($outTpl,$modx->placeholders,’[+','+]‘);

    }
        }
        catch (Exception $e) {
            //some error
occured, we output an error message and a description of the error
            $output .= ‘An
error occurred. The feed ‘ . $feed_url . ‘ could not be read: ‘ .
$e->getMessage();
        }

        return $output;
    }
}
?>

By: Abner

Abner — Sat, 05 Feb 2011 15:11:35 +0000

hI Mary, thanks for your prompt reply!
Seeing how wayfinder behaves I guess I need to use an outer template which isparsed only once, containing a wrapper placeholder…
I’m not sure but I guess I know how to do it. If I success, I’ll come back to you with my solution if you like…
Abner

By: mary

mary — Sat, 05 Feb 2011 07:06:50 +0000

I’m not entirely sure I understand your question since it seems like some things got cut out of your comment.
From what I gather though, I can say that yes, you can add as many templating chunks as you want. These chunks should come out of the HTML you’re using to set up the formatting of your output. Does this make sense? If you have a specific example of what you’re trying to do I can try to help you further

mary

By: Abner

Abner — Sat, 05 Feb 2011 06:08:01 +0000

I meant including

and

By: Abner

Abner — Sat, 05 Feb 2011 06:04:30 +0000

Hi Mary! thanks for this!
This chunk is repeated for each item in the list.
including and
for unordered lists itś no big deal if you don’t setup a different margin top and margin bottom for
I guess but I am not sure how to do this that we need to use two separate chunks, an outer tpl and a rowTpl, like wayfinder does
Do you know how it could be done?

By: mary

mary — Sat, 01 May 2010 16:31:47 +0000

Thanks for the feedback Jon!

mary

By: Jon

Jon — Sun, 25 Apr 2010 17:12:11 +0000

Wow what can I say, thank you for another brilliant set of tutorials, I find them very easy to follow and have learned more about MODx in the past few days than ever before, I will definitely use MODx for my current project, I hadn’t realised just how flexible it could be.

Thanks again Mary for all of your hard work and I look forward to going through more of your tutorials, I really like your writing style.

By: mary

mary — Tue, 16 Feb 2010 01:02:55 +0000

Thanks Bruce! Don’t know how I missed that