[177a560] | 1 | <?php |
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| 2 | |
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| 3 | /** |
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| 4 | * @file |
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| 5 | * Defines a nodereference widget for auto-creating nodes. The widget |
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| 6 | * auto-creates a node and then updates its title on change. |
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| 7 | */ |
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| 8 | |
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| 9 | /** |
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| 10 | * Implementation of hook_widget_info(). |
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| 11 | */ |
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| 12 | function nodereference_autocreate_widget_info() { |
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| 13 | return array( |
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| 14 | 'nodereference_autocreate' => array( |
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| 15 | 'label' => t('Auto-create node'), |
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| 16 | 'field types' => array('nodereference'), |
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| 17 | 'multiple values' => CONTENT_HANDLE_CORE, |
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| 18 | 'callbacks' => array( |
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| 19 | 'default value' => CONTENT_CALLBACK_DEFAULT, |
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| 20 | ), |
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| 21 | ), |
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| 22 | ); |
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| 23 | } |
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| 24 | |
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| 25 | /** |
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| 26 | * Implementation of hook_widget(). |
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| 27 | */ |
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| 28 | function nodereference_autocreate_widget(&$form, &$form_state, $field, $items, $delta = 0) { |
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| 29 | switch ($field['widget']['type']) { |
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| 30 | case 'nodereference_autocreate': |
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| 31 | $element = array( |
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| 32 | '#type' => 'text_textfield', |
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| 33 | '#default_value' => isset($items[$delta]) ? $items[$delta] : NULL, |
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| 34 | '#value_callback' => 'nodereference_autocreate_value', |
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| 35 | '#process' => array('nodereference_autocreate_process'), |
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| 36 | ); |
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| 37 | break; |
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| 38 | } |
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| 39 | return $element; |
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| 40 | } |
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| 41 | |
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| 42 | /** |
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| 43 | * Value for a nodereference auto-create element. |
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| 44 | * |
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| 45 | * Substitute in the node title for the node ID. |
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| 46 | */ |
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| 47 | function nodereference_autocreate_value($element, $edit = FALSE) { |
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| 48 | $field_key = $element['#columns'][0]; |
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| 49 | if ($nid = $element['#default_value'][$field_key]) { |
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[8f5c26c] | 50 | $value = db_result(db_query(db_rewrite_sql('SELECT n.title FROM {node} n WHERE n.nid = %d'), $nid)); |
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| 51 | return array($field_key => $value); |
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[177a560] | 52 | } |
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| 53 | return array($field_key => NULL); |
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| 54 | } |
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| 55 | |
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| 56 | /** |
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| 57 | * Process an individual element. |
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| 58 | * |
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| 59 | * @see nodereference_autocomplete_process() |
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| 60 | */ |
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| 61 | function nodereference_autocreate_process($element, $edit, $form_state, $form) { |
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| 62 | $field_key = $element['#columns'][0]; |
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[8f5c26c] | 63 | |
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[177a560] | 64 | $element[$field_key] = array( |
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[8f5c26c] | 65 | '#type' => 'text_textfield', |
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[177a560] | 66 | '#default_value' => isset($element['#value']) ? $element['#value'] : '', |
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| 67 | // The following values were set by the content module and need to be |
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| 68 | // passed down to the nested element. |
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| 69 | '#title' => $element['#title'], |
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| 70 | '#required' => $element['#required'], |
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| 71 | '#description' => $element['#description'], |
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| 72 | '#field_name' => $element['#field_name'], |
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| 73 | '#type_name' => $element['#type_name'], |
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| 74 | '#delta' => $element['#delta'], |
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| 75 | '#columns' => $element['#columns'], |
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| 76 | ); |
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| 77 | if (empty($element[$field_key]['#element_validate'])) { |
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| 78 | $element[$field_key]['#element_validate'] = array(); |
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| 79 | } |
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| 80 | array_unshift($element[$field_key]['#element_validate'], 'nodereference_autocreate_validate'); |
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[8f5c26c] | 81 | |
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[177a560] | 82 | return $element; |
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| 83 | } |
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| 84 | |
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| 85 | /** |
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| 86 | * Validate an individual element. |
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| 87 | * |
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| 88 | * Create a node with the specified value on first save. Update title of |
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| 89 | * referenced node on each additional save. |
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| 90 | */ |
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| 91 | function nodereference_autocreate_validate($element, &$form_state) { |
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| 92 | $field_name = $element['#field_name']; |
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| 93 | $type_name = $element['#type_name']; |
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| 94 | $field = content_fields($field_name, $type_name); |
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| 95 | $field_key = $element['#columns'][0]; |
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| 96 | $delta = $element['#delta']; |
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| 97 | $value = $element['#value'][$field_key]; |
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| 98 | $nid = NULL; |
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[8f5c26c] | 99 | |
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[177a560] | 100 | if ($value) { |
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| 101 | // Load the current value stored in the database. |
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[8f5c26c] | 102 | $self = node_load($form_state['values']['nid']); |
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[177a560] | 103 | $current_nid = $self->$field_name; |
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| 104 | $current_nid = $current_nid[$delta]['nid']; |
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[8f5c26c] | 105 | |
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[177a560] | 106 | if ($current_nid) { |
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| 107 | // Referenced node exists, update its title if changed. |
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| 108 | $referenced_node = node_load($current_nid); |
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[8f5c26c] | 109 | if ($referenced_node->title != $value) { |
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| 110 | $referenced_node->title = $value; |
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[177a560] | 111 | node_save($referenced_node); |
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| 112 | } |
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[8f5c26c] | 113 | |
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[177a560] | 114 | $nid = $referenced_node->nid; |
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| 115 | } |
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| 116 | else { |
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| 117 | // Create a new node with the specified title. |
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| 118 | $node = new stdClass(); |
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| 119 | $node->type = nodereference_autocreate_type_get($field['referenceable_types']); |
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[8f5c26c] | 120 | $node->title = $value; |
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[177a560] | 121 | node_save($node); |
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[8f5c26c] | 122 | |
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[177a560] | 123 | if (!$node->nid) { |
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| 124 | form_error($element[$field_key], t('%name: failed to create sub node.', array('%name' => t($field['widget']['label'])))); |
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| 125 | } |
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| 126 | else { |
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| 127 | $nid = $node->nid; |
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| 128 | } |
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| 129 | } |
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| 130 | } |
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| 131 | form_set_value($element, $nid, $form_state); |
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| 132 | } |
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| 133 | |
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| 134 | /** |
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| 135 | * Implementation of hook_form_FORM_ID_alter(): content_field_edit_form. |
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| 136 | */ |
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| 137 | function nodereference_autocreate_form_content_field_edit_form_alter(&$form, $form_state) { |
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| 138 | if ($form['#field']['widget']['type'] == 'nodereference_autocreate') { |
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| 139 | $form['field']['referenceable_types']['#description'] .= t('Only one type can be referenced when using the ' . |
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| 140 | 'auto-create node widget. The node type referenced will be used when creating a node.'); |
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[8f5c26c] | 141 | |
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[177a560] | 142 | $form['#validate'][] = 'nodereference_autocreate_content_field_edit_form_validate'; |
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| 143 | } |
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| 144 | } |
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| 145 | |
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| 146 | /** |
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| 147 | * Validate nodereference setting form. |
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| 148 | * |
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| 149 | * If widget type is nodereference_autocreate then check for multiple selected |
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| 150 | * referenceable types. |
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| 151 | */ |
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| 152 | function nodereference_autocreate_content_field_edit_form_validate($form, &$form_state) { |
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| 153 | if ($form_state['values']['widget_type'] == 'nodereference_autocreate') { |
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| 154 | $count = 0; |
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| 155 | if ($form_state['values']['referenceable_types']) { |
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| 156 | foreach ($form_state['values']['referenceable_types'] as $type => $enabled) { |
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| 157 | if ($enabled) { |
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| 158 | $count++; |
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| 159 | } |
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| 160 | } |
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[8f5c26c] | 161 | |
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[177a560] | 162 | if ($count > 1) { |
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| 163 | form_set_error('referenceable_types', t('Only one content type can be referenced for widgets of type <em>Auto-create node</em>.')); |
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| 164 | } |
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| 165 | } |
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| 166 | } |
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| 167 | } |
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| 168 | |
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| 169 | /** |
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| 170 | * Get the referenced type. |
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| 171 | * |
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| 172 | * @param $referenceable_types |
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| 173 | * Referenceable types from field form. |
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| 174 | * @return |
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| 175 | * Referenced type. |
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| 176 | */ |
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| 177 | function nodereference_autocreate_type_get(array $referenceable_types) { |
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| 178 | foreach ($referenceable_types as $type => $enabled) { |
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| 179 | if ($enabled) { |
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| 180 | return $type; |
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| 181 | } |
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| 182 | } |
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| 183 | return NULL; |
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| 184 | } |
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