Blog library override : Elgg.org

Blog library override

By TCB 1547 days ago

Hi,

I'm using elgg 2.3.14 and looking for some advice on how to change the behavior of the bundled blog plugin. What I'm trying to do:

When loading the blog view, for each blog entry I need to make a rest call to a webservice.
Process the response of the rest call and check the values of the vars 'validated' and 'address'
If 'validate' is TRUE then update the css of a blog menu icon to change the color to green and change the href address to 'address'
If 'validate' is FALSE then update the css of a blog menu icon to change the color to red and remove the href address tag.
Load the view.

When looking at the core code for blogs I saw that in the /mod/blog/lib/blog.php that there is a function blog_get_page_content_list that I wanted to override to add in my code to call my rest endpoint and process the data as explained above. Is it true that overriding can't be done on a core library? And if so, I'm working on an figuring out an alternate solution.

Thanks.

Nikolai Shcherbin 1546 days ago

Override views which calls this function:

mod\blog\views\default\resources\blog\all.php
mod\blog\views\default\resources\blog\group.php
mod\blog\views\default\resources\blog\owner.php

You can use this hook also:

$options = [
    'type' => 'object',
    'subtype' => 'blog',
    'distinct' => false,
    'no_results' => elgg_echo('blog:none'),
];

$viewer = function ($entities, $options) {
    return theme_elgg_view_entity_list($entities, $options);
};

echo elgg_list_entities($options, 'elgg_get_entities', $viewer);

Where theme_elgg_view_entity_list is your custom function to view entities, e.g.:

function theme_elgg_view_entity_list($entities, array $vars = array()) {
    $offset = (int)get_input('offset', 0);

    // list type can be passed as request parameter
    $list_type = get_input('list_type', 'custom_type');

    $defaults = [
       'items' => $entities,
       'list_class' => 'custom_class',
       'full_view' => true,
       'pagination' => true,
       'list_type' => 'custom_type',
       'list_type_toggle' => false,
       'offset' => $offset,
       'limit' => null,
   ];

   $vars = array_merge($defaults, $vars);

   if (!$vars["limit"] && !$vars["offset"]) {
     // no need for pagination if listing is unlimited
     $vars["pagination"] = false;
   }

   return elgg_view('page/components/custom_view', $vars);
}

Or add any callback which you want to use.

- TCB@tblack06
TCB 1546 days ago
- 0 likes
Thanks RvR... I think we posted at the same time. I had figured after playing around with the code last night that I could override the views to accomplish what I needed to do but I will look at your solution to guide me through some of the parts I haven't figured out yet.

Blog library override

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