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<?php
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/**
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* @file
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* Field handler to present a form field to change quantity of a line item. It's
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* a dummy handler, most part of the implementation is done via post render
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* hook.
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*/
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/**
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* Field handler to present a field to change quantity of a line item.
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*/
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class commerce_line_item_handler_field_edit_quantity extends views_handler_field {
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function construct() {
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parent::construct();
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$this->additional_fields['line_item_id'] = 'line_item_id';
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$this->additional_fields['quantity'] = 'quantity';
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// Set real_field in order to make it generate a field_alias.
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$this->real_field = 'quantity';
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}
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function render($values) {
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return '<!--form-item-' . $this->options['id'] . '--' . $this->view->row_index . '-->';
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}
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/**
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* Returns the form which replaces the placeholder from render().
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*/
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function views_form(&$form, &$form_state) {
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// The view is empty, abort.
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if (empty($this->view->result)) {
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return;
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}
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$form[$this->options['id']] = array(
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'#tree' => TRUE,
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);
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// At this point, the query has already been run, so we can access the results
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// in order to get the base key value (for example, nid for nodes).
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foreach ($this->view->result as $row_id => $row) {
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$line_item_id = $this->get_value($row, 'line_item_id');
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$quantity = $this->get_value($row, 'quantity');
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$form[$this->options['id']][$row_id] = array(
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'#type' => 'textfield',
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'#datatype' => 'integer',
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'#default_value' => round($quantity),
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'#size' => 4,
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'#maxlength' => max(4, strlen($quantity)),
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'#line_item_id' => $line_item_id,
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'#attributes' => array(
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'title' => $this->options['label'],
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),
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);
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}
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}
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function views_form_validate($form, &$form_state) {
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$field_name = $this->options['id'];
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foreach (element_children($form[$field_name]) as $row_id) {
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// Ensure the quantity is actually a numeric value.
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if (!is_numeric($form_state['values'][$field_name][$row_id]) || $form_state['values'][$field_name][$row_id] < 0) {
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form_set_error($field_name . '][' . $row_id, t('You must specify a positive number for the quantity'));
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}
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// If the custom data type attribute of the quantity element is integer,
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// ensure we only accept whole number values.
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if ($form[$field_name][$row_id]['#datatype'] == 'integer' &&
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(int) $form_state['values'][$field_name][$row_id] != $form_state['values'][$field_name][$row_id]) {
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form_set_error($field_name . '][' . $row_id, t('You must specify a whole number for the quantity.'));
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}
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}
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}
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function views_form_submit($form, &$form_state) {
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$field_name = $this->options['id'];
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$deleted_line_items = array();
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$updated_line_items = array();
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foreach (element_children($form[$field_name]) as $row_id) {
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$line_item_id = $form[$field_name][$row_id]['#line_item_id'];
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// If the line item hasn't been deleted...
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if ($line_item = commerce_line_item_load($line_item_id)) {
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$form_quantity = $form_state['values'][$field_name][$row_id];
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// If the quantity on the form is different...
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if ($form_quantity != $line_item->quantity) {
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// If the quantity specified is 0, flag the line item for deletion.
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if ($form_quantity == 0) {
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$deleted_line_items[] = $line_item_id;
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}
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else {
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// Otherwise queue the line item quantity update.
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$updated_line_items[$line_item_id] = $form_quantity;
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}
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}
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}
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}
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// Process the deletes first.
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foreach ($deleted_line_items as $line_item_id) {
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$order = commerce_order_load($form_state['order']->order_id);
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commerce_cart_order_product_line_item_delete($order, $line_item_id);
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}
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// Then process the quantity updates.
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foreach ($updated_line_items as $line_item_id => $quantity) {
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// Load the line item and update it.
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$line_item = commerce_line_item_load($line_item_id);
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$line_item->quantity = $quantity;
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commerce_line_item_save($line_item);
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entity_get_controller('commerce_line_item')->resetCache(array($line_item->line_item_id));
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}
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}
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}
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