tripal/legacy/tripal_pub/theme/templates/tripal_pub_relationships.tpl.php

<?php
/* Typically in a Tripal template, the data needed is retrieved using a call to
 * chado_expand_var function.  For example, to retrieve all 
 * of the pub relationships for this node, the following function call would be made:
 * 
 *   $pub = chado_expand_var($pub,'table','pub_relationship');
 * 
 * However, this function call can be extremely slow when there are numerous relationships.
 * This is because the chado_expand_var function is recursive and expands 
 * all data following the foreign key relationships tree.  Therefore, to speed retrieval
 * of data, a special variable is provided to this template:
 * 
 *   $pub->all_relationships;
 *   
 * This variable is an array with two sub arrays with the keys 'object' and 'subject'.  The array with
 * key 'object' contains relationships where the pub is the object, and the array with
 * the key 'subject' contains relationships where the pub is the subject
 */
$pub = $variables['node']->pub;

$all_relationships = $pub->all_relationships;
$object_rels = $all_relationships['object'];
$subject_rels = $all_relationships['subject'];

if (count($object_rels) > 0 or count($subject_rels) > 0) { ?>
    <div class="tripal_pub-data-block-desc tripal-data-block-desc"></div> <?php

  // first add in the subject relationships.  
  foreach ($subject_rels as $rel_type => $rels) {
    foreach ($rels as $obj_type => $objects) { ?>
        <p>This <?php print $pub->type_id->name; ?> is <?php print $rel_type ?>
            the following <b><?php print $obj_type ?></b> pub(s): <?php

          // the $headers array is an array of fields to use as the colum headers.
          // additional documentation can be found here
          // https://api.drupal.org/api/drupal/includes%21theme.inc/function/theme_table/7
          $headers = ['Publication'];

          // the $rows array contains an array of rows where each row is an array
          // of values for each column of the table in that row.  Additional documentation
          // can be found here:
          // https://api.drupal.org/api/drupal/includes%21theme.inc/function/theme_table/7
          $rows = [];

          foreach ($objects as $object) {
            // link the pub to it's node
            $title = $object->record->object_id->title;
            if (property_exists($object->record, 'nid')) {
              $title = l($title, "node/" . $object->record->nid, ['attributes' => ['target' => "_blank"]]);
            }

            // get the citation
            $values = [
              'pub_id' => $object->record->object_id->pub_id,
              'type_id' => [
                'name' => 'Citation',
              ],
            ];
            $citation = chado_generate_var('pubprop', $values);
            $citation = chado_expand_var($citation, 'field', 'pubprop.value');

            $rows[] = [
              $title . '<br>' . htmlspecialchars($citation->value),
            ];
          }
          // the $table array contains the headers and rows array as well as other
          // options for controlling the display of the table.  Additional
          // documentation can be found here:
          // https://api.drupal.org/api/drupal/includes%21theme.inc/function/theme_table/7
          $table = [
            'header' => $headers,
            'rows' => $rows,
            'attributes' => [
              'id' => 'tripal_pub-table-relationship-object',
              'class' => 'tripal-data-table',
            ],
            'sticky' => FALSE,
            'caption' => '',
            'colgroups' => [],
            'empty' => '',
          ];

          // once we have our table array structure defined, we call Drupal's theme_table()
          // function to generate the table.
          print theme_table($table); ?>
        </p>
        <br><?php
    }
  }

  // second add in the object relationships.  
  foreach ($object_rels as $rel_type => $rels) {
    foreach ($rels as $subject_type => $subjects) {
      ?>
        <p>The following
            <b><?php print $subjects[0]->record->subject_id->type_id->name ?></b>
            pub(s) are <?php print $rel_type ?>
            this <?php print $pub->type_id->name; ?>: <?php
          // the $headers array is an array of fields to use as the colum headers.
          // additional documentation can be found here
          // https://api.drupal.org/api/drupal/includes%21theme.inc/function/theme_table/7
          $headers = ['Publication'];

          // the $rows array contains an array of rows where each row is an array
          // of values for each column of the table in that row.  Additional documentation
          // can be found here:
          // https://api.drupal.org/api/drupal/includes%21theme.inc/function/theme_table/7
          $rows = [];

          foreach ($subjects as $subject) {
            // link the pub to it's node
            $title = $subject->record->subject_id->title;
            if (property_exists($subject->record, 'nid')) {
              $title = l($title, "node/" . $subject->record->nid, ['attributes' => ['target' => "_blank"]]);
            }

            // get the citation
            $values = [
              'pub_id' => $subject->record->subject_id->pub_id,
              'type_id' => [
                'name' => 'Citation',
              ],
            ];
            $citation = chado_generate_var('pubprop', $values);
            $citation = chado_expand_var($citation, 'field', 'pubprop.value');

            $rows[] = [
              $title . '<br>' . htmlspecialchars($citation->value),
            ];
          }
          // the $table array contains the headers and rows array as well as other
          // options for controlling the display of the table.  Additional
          // documentation can be found here:
          // https://api.drupal.org/api/drupal/includes%21theme.inc/function/theme_table/7
          $table = [
            'header' => $headers,
            'rows' => $rows,
            'attributes' => [
              'id' => 'tripal_pub-table-relationship-subject',
              'class' => 'tripal-data-table',
            ],
            'sticky' => FALSE,
            'caption' => '',
            'colgroups' => [],
            'empty' => '',
          ];

          // once we have our table array structure defined, we call Drupal's theme_table()
          // function to generate the table.
          print theme_table($table); ?>
        </p>
        <br><?php
    }
  }
}