protected function showDeleteTagForm($tag)
{
$user = $this->getUser();
if (!$user->isAllowed('deletechangetags')) {
throw new PermissionsError('deletechangetags');
}
$out = $this->getOutput();
$out->setPageTitle($this->msg('tags-delete-title'));
$out->addBacklinkSubtitle($this->getPageTitle());
// is the tag actually able to be deleted?
$canDeleteResult = ChangeTags::canDeleteTag($tag, $user);
if (!$canDeleteResult->isGood()) {
$out->addWikiText("<div class=\"error\">\n" . $canDeleteResult->getWikiText() . "\n</div>");
if (!$canDeleteResult->isOK()) {
return;
}
}
$preText = $this->msg('tags-delete-explanation-initial', $tag)->parseAsBlock();
$tagUsage = ChangeTags::tagUsageStatistics();
if (isset($tagUsage[$tag]) && $tagUsage[$tag] > 0) {
$preText .= $this->msg('tags-delete-explanation-in-use', $tag, $tagUsage[$tag])->parseAsBlock();
}
$preText .= $this->msg('tags-delete-explanation-warning', $tag)->parseAsBlock();
// see if the tag is in use
$this->extensionActivatedTags = array_fill_keys(ChangeTags::listExtensionActivatedTags(), true);
if (isset($this->extensionActivatedTags[$tag])) {
$preText .= $this->msg('tags-delete-explanation-active', $tag)->parseAsBlock();
}
$fields = [];
$fields['Reason'] = ['type' => 'text', 'label' => $this->msg('tags-delete-reason')->plain(), 'size' => 50];
$fields['HiddenTag'] = ['type' => 'hidden', 'name' => 'tag', 'default' => $tag, 'required' => true];
$form = new HTMLForm($fields, $this->getContext());
$form->setAction($this->getPageTitle('delete')->getLocalURL());
$form->tagAction = 'delete';
// custom property on HTMLForm object
$form->setSubmitCallback([$this, 'processTagForm']);
$form->setSubmitTextMsg('tags-delete-submit');
$form->setSubmitDestructive();
// nasty!
$form->addPreText($preText);
$form->show();
}
