'-',
'single' => 'd F Y',
'single_all_day' => 'd F Y',
'one_day' => 'd F Y',
'one_month' => 'd - {d} F Y',
'several_months' => 'd F - {d} {F} Y',
'several_years' => 'd F Y - {d} {F} {Y}',
] + parent::defaultSettings();
}
/**
* {@inheritdoc}
*/
public function viewElements(FieldItemListInterface $items, $langcode) {
$elements = [];
foreach ($items as $delta => $item) {
if (!empty($item->start_date) && !empty($item->end_date)) {
/** @var \Drupal\Core\Datetime\DrupalDateTime $start_date */
$start_date = $item->start_date->getTimestamp();
/** @var \Drupal\Core\Datetime\DrupalDateTime $end_date */
$end_date = $item->end_date->getTimestamp();
if ($start_date !== $end_date) {
$format = $this->getSetting('several_years');
if (date('Y', $start_date) === date('Y', $end_date)) {
$format = $this->getSetting('several_months');
}
if (date('m.Y', $start_date) === date('m.Y', $end_date)) {
$format = $this->getSetting('one_month');
}
if (date('d.m.Y', $start_date) === date('d.m.Y', $end_date)) {
$format = $this->getSetting('one_day');
}
$date_str = format_date($start_date, 'custom', preg_replace('/\{([a-zA-Z])\}/', '{\\\$1}', t($format)));
$matches = array();
if (preg_match_all('/\{([a-zA-Z])\}/', $date_str, $matches)) {
foreach ($matches[1] as $match) {
$date_str = preg_replace('/\{' . $match . '\}/', format_date($end_date, 'custom', $match), $date_str);
}
}
$elements[$delta] = ['#markup' => '' . $date_str . '',];
}
else {
$format = $this->getSetting('one_day');
$date_str = format_date($start_date, 'custom', $format);
$elements[$delta] = ['#markup' => $date_str];
}
}
}
return $elements;
}
/**
* {@inheritdoc}
*/
public function settingsForm(array $form, FormStateInterface $form_state) {
$form = parent::settingsForm($form, $form_state);
unset($form['date_format']);
$form['single'] = [
'#type' => 'textfield',
'#title' => t('Date format for single date'),
'#default_value' => $this->getSetting('single') ? : 'd F Y',
];
$form['single_all_day'] = [
'#type' => 'textfield',
'#title' => t('Date format for the single date if the date is "all day"'),
'#default_value' => $this->getSetting('single_all_day') ? : 'd F Y',
];
$form['one_day'] = [
'#type' => 'textfield',
'#title' => t('Date format for the single day date range'),
'#default_value' => $this->getSetting('one_day') ? : 'd F Y',
];
$form['one_month'] = [
'#type' => 'textfield',
'#title' => t('Date format for the single month date range'),
'#default_value' => $this->getSetting('one_month') ? : 'd - {d} F Y',
];
$form['several_months'] = [
'#type' => 'textfield',
'#title' => t('Date format for the single year date range'),
'#default_value' => $this->getSetting('several_months') ? : 'd F - {d} {F} Y',
];
$form['several_years'] = [
'#type' => 'textfield',
'#title' => t('Date format for multiple years date range'),
'#default_value' => $this->getSetting('several_years') ? : 'd F Y - {d} {F} {Y}',
];
$form['help'] = [
'#type' => 'markup',
'#markup' => t('A user-defined date format. See the PHP manual for available options.', ['@url' => 'http://php.net/manual/function.date.php']) .
'
' . t('Use letters in braces for end date elements, for example, {d} means the day of the end date.') .
'
' . t('These format values are translated, for example, t("d F Y") instead of "d F Y" will be used as the actual date format.'),
];
return $form;
}
/**
* {@inheritdoc}
*/
public function settingsSummary() {
$summary = parent::settingsSummary();
$summary[] = $this->t('Display date range using formats: @single, @single_all_day, @one_day, @one_month, @several_months, @several_years',
array(
'@single' => $this->getSetting('single') ? : 'd F Y',
'@single_all_day' => $this->getSetting('single_all_day') ? : 'd F Y',
'@one_day' => $this->getSetting('one_day') ? : 'd F Y',
'@one_month' => $this->getSetting('one_month') ? : 'd - {d} F Y',
'@several_months' => $this->getSetting('several_months') ? : 'd F - {d} {F} Y',
'@several_years' => $this->getSetting('several_years') ? : 'd F Y - {d} {F} {Y}',
)
);
return $summary;
}
}