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<?php
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/**
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* @file
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* Functionality for the computed field.
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*/
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/**
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* Implements hook_field_info().
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*/
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function computed_field_field_info() {
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return array(
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'computed' => array(
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'label' => t('Computed'),
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'description' => t('Create field data via PHP code.'),
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'settings' => array(
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'code' => '$entity_field[0][\'value\'] = "";',
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'display_format' => '$display_output = $entity_field_item[\'value\'];',
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'store' => 1,
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'recalculate' => FALSE,
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'database' => array(
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'data_type' => 'varchar',
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'data_length' => 32,
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'data_size' => 'normal',
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'data_precision' => 10,
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'data_scale' => 2,
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'data_not_NULL' => FALSE,
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'data_default' => NULL,
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'data_index' => FALSE,
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),
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),
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'default_widget' => 'computed',
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'default_formatter' => 'computed_field_plain',
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// If we followed the core convention of separate fields for each data
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// type we could make Entity API happy by just setting a property_type.
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// Instead we have to use our own callback to determine the type then
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// rerun theirs to setup the rest of the field properties.
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'property_callbacks' => array('computed_field_entity_property_callback'),
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),
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);
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}
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/**
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* Callback to setup Entity API's field properties.
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*/
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function computed_field_entity_property_callback(&$info, $entity_type, $field, $instance, $field_type) {
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$property_types = array(
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'int' => 'integer',
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'float' => 'decimal',
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'numeric' => 'decimal',
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'varchar' => 'text',
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'text' => 'text',
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'longtext' => 'text',
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);
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if (isset($field['columns']['value']) && isset($property_types[$field['columns']['value']['type']])) {
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// Entity API's defaults are pretty good so set the property_type and let them do the work for us.
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$field_type['property_type'] = $property_types[$field['columns']['value']['type']];
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entity_metadata_field_default_property_callback($info, $entity_type, $field, $instance, $field_type);
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// The only thing is that a setter doesn't make sense, so let's disable it.
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$property = &$info[$entity_type]['bundles'][$instance['bundle']]['properties'][$field['field_name']];
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unset($property['setter callback']);
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}
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}
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/**
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* Implements hook_field_settings_form().
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*/
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function computed_field_field_settings_form($field, $instance, $has_data) {
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$form = array();
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$compute_func = 'computed_field_' . $field['field_name'] . '_compute';
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$display_func = 'computed_field_' . $field['field_name'] . '_display';
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$settings = $field['settings'];
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$form['#element_validate'] = array('computed_field_field_settings_form_validate');
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$form['code'] = array(
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'#type' => 'textarea',
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'#rows' => 15,
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'#title' => t('Computed Code (PHP)'),
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'#description' => t('<p>The variables available to your code include: <code>@fields</code>. To set the value of the field, set <code>@entity_field</code>. For multi-value computed fields continue with <code>@entity_field_multi</code>. Here\'s a simple example which sets the computed field\'s value to the value of the sum of the number fields (<code>@field_a</code> and <code>@field_b</code>) in a node entity:</p> !example <p>Alternately, this code can be supplied by your own custom function named: <code>@compute_func(&$entity_field, $entity_type, $entity, $field, $instance, $langcode, $items)</code>.</p>', array(
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'@fields' => '&$entity_field, $entity_type, $entity, $field, $instance, $langcode, and $items',
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'@entity_field' => '$entity_field[0][\'value\']',
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'@entity_field_multi' => '$entity_field[1][\'value\']',
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'@field_a' => 'field_a',
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'@field_b' => 'field_b',
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'!example' => '<p><code>$field_a = field_get_items($entity_type, $entity, "field_a");<br />
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$field_b = field_get_items($entity_type, $entity, "field_b");<br />
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$entity_field[0]["value"] = $field_a[0]["value"] + $field_b[0]["value"];</code></p>
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',
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'@compute_func' => $compute_func,
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)),
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'#default_value' => !empty($settings['code']) ? $settings['code'] : '$entity_field[0][\'value\'] = "";',
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'#access' => !function_exists($compute_func),
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);
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if (function_exists($compute_func)) {
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$form['compute_func'] = array(
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'#type' => 'item',
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'#markup' => t('<strong>This field is COMPUTED using <code>@compute_func()</code>.</strong>', array('@compute_func' => $compute_func)),
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);
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}
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$form['display_format'] = array(
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'#type' => 'textarea',
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'#title' => t('Display Code (PHP)'),
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'#description' => t('This code should assign a string to the <code>@display_output</code> variable, which will be printed when the field is displayed. The raw computed value of the field is in <code>@value</code>. <strong>Note:</strong> this code has no effect if you use the "Raw computed value" display formatter.<p> Alternately, this code can be supplied by your own custom function named: <code>@display_func($field, $entity_field_item, $entity_lang, $langcode, $entity)</code>. Return the value to be displayed. Original value is in $entity_field_item[\'value\'].', array(
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'@display_output' => '$display_output',
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'@value' => '$entity_field_item[\'value\']',
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'@display_func' => $display_func,
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)),
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'#default_value' => !empty($settings['display_format']) ? $settings['display_format'] : '$display_output = $entity_field_item[\'value\'];',
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'#access' => !function_exists($display_func),
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);
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if (function_exists($display_func)) {
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$form['display_func'] = array(
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'#type' => 'item',
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'#markup' => t('<strong>This field is DISPLAYED using <code>@display_func()</code>.</strong>', array('@display_func' => $display_func)),
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);
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}
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$form['recalculate'] = array(
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'#type' => 'checkbox',
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'#title' => t('Recalculate the field value every time.'),
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'#description' => t('By default, Drupal will cache the value of this field even if it is not stored in the database (and even if Page Caching is disabled). This option will cause computed_field to recalculate the value every time this field is displayed. For example, a time-based calculated value may change more often than field cache is cleared. (Note that Drupal page caching will still cache the field value.)'),
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'#default_value' => is_numeric($settings['recalculate']) ? $settings['recalculate'] : FALSE,
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);
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$form['store'] = array(
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'#type' => 'checkbox',
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'#title' => t('Store value in the database'),
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'#description' => t('The value will be stored in the database with the settings below. As a result, it will only be recalculated when the entity is updated. This option is required when accessing the field through Views.'),
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'#default_value' => is_numeric($settings['store']) ? $settings['store'] : 1 ,
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'#disabled' => $has_data,
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);
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$form['database'] = array('#type' => 'fieldset', '#title' => t('Database Storage Settings'));
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if ($has_data) {
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$form['database']['warning'] = array(
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'#type' => 'item',
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'#markup' => t('<strong>**This field currently has stored data, so modifications to its DB settings are not allowed.**</strong>'),
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);
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}
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$form['database']['data_type'] = array(
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'#type' => 'radios',
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'#title' => t('Data Type'),
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'#description' => t('The SQL datatype to store this field in.'),
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'#default_value' => !empty($settings['database']['data_type']) ? $settings['database']['data_type'] : 'varchar',
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'#options' => array(
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'varchar' => 'varchar',
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'text' => 'text',
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'longtext' => 'longtext',
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'int' => 'int',
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'float' => 'float',
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'numeric' => 'decimal',
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),
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'#required' => FALSE,
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'#disabled' => $has_data,
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);
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$form['database']['data_length'] = array(
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'#type' => 'textfield',
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'#title' => t('Data Length (varchar/text)'),
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'#description' => t('<strong>Only</strong> valid for <strong>varchar</strong> or <strong>text</strong> fields. The length of the field stored in the database.'),
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'#default_value' => !empty($settings['database']['data_length']) ? $settings['database']['data_length'] : 32,
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'#required' => FALSE,
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'#disabled' => $has_data,
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);
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$form['database']['data_size'] = array(
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'#type' => 'select',
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'#title' => t('Data Size (int/float)'),
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'#description' => t('<strong>Only</strong> valid for <strong>int</strong> or <strong>float</strong> fields. The size of the field stored in the database.'),
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'#default_value' => !empty($settings['database']['data_size']) ? $settings['database']['data_size'] : 'normal',
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'#options' => array(
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'tiny' => 'tiny',
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'small' => 'small',
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'medium' => 'medium',
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'normal' => 'normal',
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'big' => 'big',
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),
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'#required' => FALSE,
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'#disabled' => $has_data,
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);
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$form['database']['data_precision'] = array(
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'#type' => 'select',
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'#title' => t('Decimal Precision (decimal)'),
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'#description' => t('<strong>Only</strong> valid for <strong>decimal</strong> fields. The total number of digits to store in the database, including those to the right of the decimal.'),
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'#options' => drupal_map_assoc(range(10, 32)),
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'#default_value' => !empty($settings['database']['data_precision']) ? $settings['database']['data_precision'] : 10,
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'#required' => FALSE,
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'#disabled' => $has_data,
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);
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$form['database']['data_scale'] = array(
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'#type' => 'select',
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'#title' => t('Decimal Scale (decimal)'),
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'#description' => t('<strong>Only</strong> valid for <strong>decimal</strong> fields. The number of digits to the right of the decimal. '),
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'#options' => drupal_map_assoc(range(0, 10)),
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'#default_value' => !empty($settings['database']['data_scale']) ? $settings['database']['data_scale'] : 2,
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'#required' => FALSE,
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'#disabled' => $has_data,
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);
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$form['database']['data_default'] = array(
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'#type' => 'textfield',
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'#title' => t('Default Value'),
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'#default_value' => $settings['database']['data_default'],
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200
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'#required' => FALSE,
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201
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'#disabled' => $has_data,
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202
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);
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203
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$form['database']['data_not_NULL'] = array(
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'#type' => 'checkbox',
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'#title' => t('Not NULL'),
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'#default_value' => is_numeric($settings['database']['data_not_NULL']) ? $settings['database']['data_not_NULL'] : FALSE,
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'#disabled' => $has_data,
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);
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209
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$form['database']['data_index'] = array(
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210
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'#type' => 'checkbox',
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'#title' => t('Index computed values in the database (Does not apply to text or longtext fields.)'),
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212
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'#default_value' => is_numeric($settings['database']['data_index']) ? $settings['database']['data_index'] : FALSE,
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213
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'#disabled' => $has_data,
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214
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);
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215
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return $form;
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216
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}
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217
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218
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/**
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219
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* #element_validate callback for computed_field_field_settings_form().
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220
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*/
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221
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function computed_field_field_settings_form_validate($element, &$form_state) {
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222
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$settings = $form_state['values']['field']['settings'];
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223
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if ($settings['store']) {
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224
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if (empty($settings['database']['data_type'])) {
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225
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form_set_error('field][settings][data_type', t('To store this field in the database, please specify a data type.'));
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226
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}
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227
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if (($settings['database']['data_type'] == 'text' || $settings['database']['data_type'] == 'varchar') && empty($settings['database']['data_length'])) {
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228
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form_set_error('field][settings][database][data_length', t('To store this field in the database, please specify the data length.'));
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229
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}
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230
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if (($settings['database']['data_type'] == 'int' || $settings['database']['data_type'] == 'float') && (!empty($settings['database']['data_default']) && !is_numeric($settings['database']['data_default']))) {
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231
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form_set_error('field][settings][database][data_default', t('Your default value should be numeric given your data type.'));
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232
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}
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233
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}
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234
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}
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|
235
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236
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/**
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237
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* Implements hook_field_load().
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238
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*/
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239
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function computed_field_field_load($entity_type, $entities, $field, $instances, $langcode, &$items, $age) {
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240
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$settings = $field['settings'];
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241
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// Compute field values on load if they aren't stored in the database.
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242
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if (!$settings['store']) {
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243
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foreach ($entities as $etid => $entity) {
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244
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_computed_field_compute_value($entity_type, $entity, $field, $instances, $langcode, $items[$etid]);
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245
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}
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246
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}
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247
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}
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|
248
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249
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/**
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250
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* Implements hook_field_prepare_view().
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251
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*/
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252
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function computed_field_field_prepare_view($entity_type, $entities, $field, $instances, $langcode, &$items) {
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253
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$settings = $field['settings'];
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254
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// Compute field values in case user is "previewing" an entity.
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255
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foreach ($entities as $etid => $entity) {
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256
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if ((isset($entity->op) && $entity->op == 'Preview') || $settings['recalculate']) {
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257
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_computed_field_compute_value($entity_type, $entity, $field, $instances, $langcode, $items[$etid]);
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258
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}
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259
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}
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260
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}
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|
261
|
|
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262
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/**
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263
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* Implements hook_field_insert().
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264
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*/
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265
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function computed_field_field_insert($entity_type, $entity, $field, $instance, $langcode, &$items) {
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266
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_computed_field_compute_value($entity_type, $entity, $field, $instance, $langcode, $items);
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|
267
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}
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|
268
|
|
|
269
|
/**
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270
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* Implements hook_field_update().
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271
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*/
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272
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function computed_field_field_update($entity_type, $entity, $field, $instance, $langcode, &$items) {
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273
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_computed_field_compute_value($entity_type, $entity, $field, $instance, $langcode, $items);
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274
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}
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|
275
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|
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276
|
/**
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277
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* Implements hook_field_widget_info().
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278
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*/
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279
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function computed_field_field_widget_info() {
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280
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return array(
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281
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'computed' => array(
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282
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'label' => t('Computed'),
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283
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'field types' => array('computed'),
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284
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'behaviors' => array(
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285
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'multiple values' => FIELD_BEHAVIOR_CUSTOM,
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286
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'default value' => FIELD_BEHAVIOR_NONE,
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287
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),
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288
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),
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289
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);
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290
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}
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291
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|
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292
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/**
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293
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* Implements hook_field_widget_form().
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294
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*/
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295
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function computed_field_field_widget_form(&$form, &$form_state, $field, $instance, $langcode, $items, $delta, $element) {
|
|
296
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|
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297
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// If there are no items yet, add a null item value to avoid
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298
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// preview errors when selecting a different language.
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|
299
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if (empty($items)) {
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300
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$items[0]['value'] = NULL;
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301
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}
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302
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303
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foreach ($items as $item_delta => $item) {
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304
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$element[$item_delta]['value'] = array(
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305
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'#type' => 'value',
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306
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'#tree' => TRUE,
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307
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'#default_value' => isset($item['value']) ? $item['value'] : NULL,
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308
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);
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309
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}
|
|
310
|
return $element;
|
|
311
|
}
|
|
312
|
|
|
313
|
/**
|
|
314
|
* Implements hook_field_formatter_info().
|
|
315
|
*/
|
|
316
|
function computed_field_field_formatter_info() {
|
|
317
|
return array(
|
|
318
|
'computed_field_unsanitized' => array(
|
|
319
|
'label' => t('Unsanitized'),
|
|
320
|
'field types' => array('computed'),
|
|
321
|
),
|
|
322
|
'computed_field_plain' => array(
|
|
323
|
'label' => t('Plain text'),
|
|
324
|
'field types' => array('computed'),
|
|
325
|
),
|
|
326
|
'computed_field_markup' => array(
|
|
327
|
'label' => t('Filtered markup'),
|
|
328
|
'field types' => array('computed'),
|
|
329
|
),
|
|
330
|
'computed_field_computed_value' => array(
|
|
331
|
'label' => t('Raw value, no display code'),
|
|
332
|
'field types' => array('computed'),
|
|
333
|
),
|
|
334
|
);
|
|
335
|
}
|
|
336
|
|
|
337
|
/**
|
|
338
|
* Implements hook_field_formatter_view().
|
|
339
|
*/
|
|
340
|
function computed_field_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
|
|
341
|
$element = array();
|
|
342
|
$data_to_display = FALSE;
|
|
343
|
|
|
344
|
// Special case formatter that returns the raw computed values without any display code processing.
|
|
345
|
if ($display['type'] == "computed_field_computed_value") {
|
|
346
|
foreach ($items as $delta => $item) {
|
|
347
|
if (!isset($entity_field_item['value'])) {
|
|
348
|
$entity_field_item['value'] = NULL;
|
|
349
|
}
|
|
350
|
$element[$delta] = array('#markup' => $item['value']);
|
|
351
|
}
|
|
352
|
return $element;
|
|
353
|
}
|
|
354
|
|
|
355
|
// Other display formatters which run through display code processing.
|
|
356
|
// Check if the value is to be formatted by a display function outside the DB.
|
|
357
|
$display_func = 'computed_field_' . $field['field_name'] . '_display';
|
|
358
|
$display_in_code = function_exists($display_func) ? TRUE : FALSE;
|
|
359
|
|
|
360
|
// Loop the items to display.
|
|
361
|
foreach ($items as $delta => $item) {
|
|
362
|
|
|
363
|
// For "some" backwards compatibility.
|
|
364
|
$entity_field_item = $item;
|
|
365
|
|
|
366
|
// Setup a variable with the entity language if available.
|
|
367
|
if (isset($entity->language)) {
|
|
368
|
$entity_lang = $entity->language;
|
|
369
|
}
|
|
370
|
else {
|
|
371
|
$entity_lang = LANGUAGE_NONE;
|
|
372
|
}
|
|
373
|
|
|
374
|
// If there are value "holes" in the field array let's set the value to NULL.
|
|
375
|
// to avoid undefined index errors in typical PHP display code.
|
|
376
|
if (!isset($entity_field_item['value'])) {
|
|
377
|
$entity_field_item['value'] = NULL;
|
|
378
|
}
|
|
379
|
|
|
380
|
// Execute the display code.
|
|
381
|
$display_output = NULL;
|
|
382
|
if ($display_in_code) {
|
|
383
|
$display_output = $display_func($field, $entity_field_item, $entity_lang, $langcode, $entity);
|
|
384
|
}
|
|
385
|
else {
|
|
386
|
eval($field['settings']['display_format']);
|
|
387
|
}
|
|
388
|
|
|
389
|
// Track if any of our items produce non-empty output.
|
|
390
|
if (!empty($display_output) || is_numeric($display_output)) {
|
|
391
|
$data_to_display = TRUE;
|
|
392
|
}
|
|
393
|
|
|
394
|
// Output the formatted display item.
|
|
395
|
switch ($display['type']) {
|
|
396
|
case 'computed_field_unsanitized':
|
|
397
|
$element[$delta] = array('#markup' => $display_output);
|
|
398
|
break;
|
|
399
|
|
|
400
|
case 'computed_field_plain':
|
|
401
|
$element[$delta] = array('#markup' => check_plain($display_output));
|
|
402
|
break;
|
|
403
|
|
|
404
|
case 'computed_field_markup':
|
|
405
|
$element[$delta] = array('#markup' => check_markup($display_output));
|
|
406
|
break;
|
|
407
|
}
|
|
408
|
}
|
|
409
|
// If all items are empty then we should not return anything. This helps
|
|
410
|
// ensure that empty fields are not displayed at all. This check does not
|
|
411
|
// apply to fields stored in the DB as those are instead checked on save.
|
|
412
|
if (isset($field['settings']['store']) && !$field['settings']['store'] && !$data_to_display) {
|
|
413
|
return;
|
|
414
|
}
|
|
415
|
return $element;
|
|
416
|
}
|
|
417
|
|
|
418
|
/**
|
|
419
|
* Implements hook_field_is_empty().
|
|
420
|
*/
|
|
421
|
function computed_field_field_is_empty($item, $field) {
|
|
422
|
unset($empty);
|
|
423
|
|
|
424
|
// This will depend on the class of data type.
|
|
425
|
switch ($field['settings']['database']['data_type']) {
|
|
426
|
|
|
427
|
case 'int':
|
|
428
|
case 'float':
|
|
429
|
case 'numeric':
|
|
430
|
// For numbers, the field is empty if the value isn't numeric.
|
|
431
|
$empty = !is_numeric($item['value']);
|
|
432
|
break;
|
|
433
|
|
|
434
|
case 'varchar':
|
|
435
|
case 'text':
|
|
436
|
case 'longtext':
|
|
437
|
// For strings, the field is empty if it doesn't match the empty string.
|
|
438
|
$empty = ($item['value'] === "");
|
|
439
|
break;
|
|
440
|
}
|
|
441
|
return $empty;
|
|
442
|
}
|
|
443
|
|
|
444
|
/**
|
|
445
|
* Private function to compute the fields value.
|
|
446
|
*/
|
|
447
|
function _computed_field_compute_value($entity_type, $entity, $field, $instance, $langcode, &$items) {
|
|
448
|
$settings = $field['settings'];
|
|
449
|
|
|
450
|
// Setup a variable with the field values.
|
|
451
|
$entity_field =& $items;
|
|
452
|
|
|
453
|
// Setup a variable with the entity language if available.
|
|
454
|
if (isset($entity->language)) {
|
|
455
|
$entity_lang = $entity->language;
|
|
456
|
}
|
|
457
|
else {
|
|
458
|
$entity_lang = LANGUAGE_NONE;
|
|
459
|
}
|
|
460
|
|
|
461
|
// Allow the value to be computed from code not stored in DB.
|
|
462
|
$compute_func = 'computed_field_' . $field['field_name'] . '_compute';
|
|
463
|
if (function_exists($compute_func)) {
|
|
464
|
$compute_func($entity_field, $entity_type, $entity, $field, $instance, $langcode, $items);
|
|
465
|
}
|
|
466
|
else {
|
|
467
|
if (isset($settings['code'])) {
|
|
468
|
eval($settings['code']);
|
|
469
|
}
|
|
470
|
}
|
|
471
|
}
|
