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| 1 | <?php |
| 2 | |
| 3 | namespace Drupal\visitors\Plugin\views\field; |
| 4 | |
| 5 | use Drupal\views\Attribute\ViewsField; |
| 6 | use Drupal\views\Plugin\views\field\FieldPluginBase; |
| 7 | |
| 8 | /** |
| 9 | * Field handler to display bounce rate. |
| 10 | */ |
| 11 | #[ViewsField("visitors_bounce")] |
| 12 | class Bounce extends FieldPluginBase { |
| 13 | |
| 14 | /** |
| 15 | * The formula for this handler. |
| 16 | * |
| 17 | * @var string|null |
| 18 | */ |
| 19 | public $formula = "CASE WHEN ***table***.total_events = 1 THEN 1 ELSE 0 END"; |
| 20 | |
| 21 | /** |
| 22 | * Gets the prepared formula. |
| 23 | * |
| 24 | * @return string |
| 25 | * The formula with the table placeholder replaced. |
| 26 | */ |
| 27 | public function getFormula() { |
| 28 | return str_replace('***table***', $this->tableAlias, $this->formula); |
| 29 | } |
| 30 | |
| 31 | /** |
| 32 | * {@inheritdoc} |
| 33 | */ |
| 34 | public function query() { |
| 35 | $this->ensureMyTable(); |
| 36 | |
| 37 | // Get the formula and add it as a field. |
| 38 | $formula = $this->getFormula(); |
| 39 | |
| 40 | // Add the field with aggregation support. |
| 41 | $params = []; |
| 42 | |
| 43 | // Always set a function for aggregation when grouping is enabled. |
| 44 | if ($this->view->display_handler->useGroupBy()) { |
| 45 | $params['function'] = !empty($this->options['group_type']) && $this->options['group_type'] != 'group' |
| 46 | ? $this->options['group_type'] |
| 47 | : 'sum'; |
| 48 | |
| 49 | $params['orderby'] = FALSE; |
| 50 | $params['no_group'] = TRUE; |
| 51 | } |
| 52 | |
| 53 | // Use addField with NULL table to indicate this is an expression/formula. |
| 54 | // This allows Views to properly apply aggregation functions to |
| 55 | // the expression. |
| 56 | $this->field_alias = $this->query->addField(NULL, $formula, $this->tableAlias . '__bounce', $params); |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * {@inheritdoc} |
| 61 | */ |
| 62 | public function usesGroupBy() { |
| 63 | return FALSE; |
| 64 | } |
| 65 | |
| 66 | } |