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1 <?php
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2
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3 /**
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4 * @file relationships/term_parent.inc
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5 * Plugin to provide an relationship handler for term parent.
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6 */
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7
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8 /**
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9 * Plugins are described by creating a $plugin array which will be used
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10 * by the system that includes this file.
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11 */
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12 $plugin = array(
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13 'title' => t('Term parent'),
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14 'keyword' => 'parent_term',
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15 'description' => t('Adds a taxonomy term parent from a term context.'),
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16 'required context' => new ctools_context_required(t('Term'), 'entity:taxonomy_term'),
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17 'context' => 'ctools_term_parent_context',
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18 'edit form' => 'ctools_term_parent_settings_form',
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19 'defaults' => array('type' => 'top'),
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20 );
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21
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22 /**
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23 * Return a new context based on an existing context.
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24 */
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25 function ctools_term_parent_context($context, $conf) {
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26 // If unset it wants a generic, unfilled context, which is just NULL.
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27 if (empty($context->data)) {
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28 return ctools_context_create_empty('entity:taxonomy_term');
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29 }
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30
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31 if (isset($context->data)) {
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32 $result = db_query('SELECT t1.* FROM {taxonomy_term_hierarchy} t1 INNER JOIN {taxonomy_term_hierarchy} t2 ON t1.tid = t2.parent WHERE t2.tid = :tid', array(':tid' => $context->data->tid))->fetchAssoc();
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33
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34 // If top level term, keep looking up until we see a top level.
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35 if ($conf['type'] == 'top') {
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36 // If looking for top level, and there are no parents at all, make sure
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37 // the current term is the 'top level'.
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38 if (empty($result)) {
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39 $result['tid'] = $context->data->tid;
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40 }
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41 while (!empty($result['parent'])) {
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42 $result = db_query('SELECT * FROM {taxonomy_term_hierarchy} WHERE tid = :tid', array(':tid' => $result['parent']))->fetchAssoc();
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43 }
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44 }
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45
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46 // Load the term.
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47 if ($result) {
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48 $term = taxonomy_term_load($result['tid']);
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49 return ctools_context_create('entity:taxonomy_term', $term);
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50 }
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51 }
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52 }
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53
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54 /**
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55 * Settings form for the relationship.
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56 */
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57 function ctools_term_parent_settings_form($form, &$form_state) {
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58 $conf = $form_state['conf'];
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59
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60 $form['type'] = array(
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61 '#type' => 'select',
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62 '#title' => t('Relationship type'),
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63 '#options' => array('parent' => t('Immediate parent'), 'top' => t('Top level term')),
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64 '#default_value' => $conf['type'],
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65 );
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66
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67 return $form;
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68 }
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