Problem with snippet based in TV using ditto

11 Posts

haniel Reply #1, 12 years, 6 months ago

Hope someone can help with this. I have a snippet that the number of facebook likes for a url. This outputs as a number i.e. '1'. How can I get ditto to order child documents based on these numbers? I have tried placing the snippet call in a TV and ordering by that TV, but it doesn't work.

Snippet:

<?php
$source_url = $modx->makeUrl($modx->documentIdentifier, '', '', 'full');

$url = "http://api.facebook.com/restserver.php?method=links.getStats&urls=".urlencode($source_url);
$xml = file_get_contents($url);
$xml = simplexml_load_string($xml);
$shares = $xml->link_stat->share_count;
$likes = $xml->link_stat->like_count;
$comments = $xml->link_stat->comment_count;
$total = $xml->link_stat->total_count;
$max = max($shares,$likes,$comments);

echo $likes;
?>

24,544 Posts

BobRay Reply #2, 12 years, 6 months ago

The problem is that your snippet always gets the likes for the current page (the one with the Ditto tag on it).

I think you might be able to do it with an @EVAL TV with runSnippet if the snippet just returned number of likes for that individual resource.

If not, the only thing I can think of is a plugin connected to OnWebPageRender that gets the "likes" for that page and writes them into the TV. Then the TV could be used to sort them, but the numbers would not be current except for recently visited pages.

I can't think of any other way to do it without either hacking the Ditto code or replacing Ditto with your own custom snippet that calculated the likes for all pages and then sorted them.

Maybe someone else has a better idea.

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11 Posts

haniel Reply #3, 12 years, 6 months ago

I haven't used @EVAL before, do you know of a tutorial?

11 Posts

haniel Reply #4, 12 years, 6 months ago

Got @EVAL working. Unfortunately it didn't work. Thanks for your input.

24,544 Posts

BobRay Reply #5, 12 years, 6 months ago

I don't see any reason why it shouldn't work with @EVAL. Change 'echo' to 'return'.

You'll also have to send the correct Resource ID as an argument to your snippet in the runSnippet() call instead of using documentIdentifier.

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11 Posts

haniel Reply #6, 12 years, 6 months ago

Ok I have changed 'echo' to be 'return', still the same result.

Do you mean I also need to change the code like this?

$source_url = $modx->makeUrl($modx->documentIdentifier, '', '', 'full');

to

$source_url = $modx->makeUrl($modx->runSnippet(), '', '', 'full');

My EVAL code is as follows:

@EVAL return $modx->runSnippet('get_like_count');

24,544 Posts

BobRay Reply #7, 12 years, 6 months ago

I meant to use something like this:

@EVAL return $modx->runSnippet('get_like_count', array('docId'=>'12'));

Then in the snippet:

<?php
$source_url = $modx->makeUrl($scriptProperties['docId'], '', '', 'full');

The rest of the snippet would look like your original one (but with return instead of echo).

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11 Posts

haniel Reply #8, 12 years, 6 months ago

I seem to be getting a parse error

MODx encountered the following error while attempting to parse the requested resource:
« `` is not numeric and may not be passed to makeUrl() »

11 Posts

haniel Reply #9, 12 years, 6 months ago

I changed the line

$source_url = $modx->makeUrl($scriptProperties['docId'], '', '', 'full');

to

$source_url = $modx->makeUrl($docId, '', '', 'full');

and now it gets the like numbers again but still not ordering correctly using script. I have tried putting numbers 0,1,2 into my TV's (for three child documents) and ditto is sorting properly, so ditto still seems to be running before script is parsed.

11 Posts

haniel Reply #10, 12 years, 6 months ago

Anyone got any further suggestions?