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<?php
/**
* Sitewide configuration.
*
* h2. Translation
*
* To enable translation of configurations alongside the {@link Translatable} extension.
* This also allows assigning language-specific toplevel permissions for viewing and editing
* pages, in addition to the normal `TRANSLATE_*`/`TRANSLATE_ALL` permissions.
*
* Object::add_extension('SiteConfig', 'Translatable');
*
* @author Tom Rix
* @package cms
*/
class SiteConfig extends DataObject implements PermissionProvider {
static $db = array(
"Title" => "Varchar(255)",
"Tagline" => "Varchar(255)",
"Theme" => "Varchar(255)",
"CanViewType" => "Enum('Anyone, LoggedInUsers, OnlyTheseUsers', 'Anyone')",
"CanEditType" => "Enum('LoggedInUsers, OnlyTheseUsers', 'LoggedInUsers')",
"CanCreateTopLevelType" => "Enum('LoggedInUsers, OnlyTheseUsers', 'LoggedInUsers')",
);

static $many_many = array(
"ViewerGroups" => "Group",
"EditorGroups" => "Group",
"CreateTopLevelGroups" => "Group"
);

protected static $disabled_themes = array();

public static function disable_theme($theme) {
self::$disabled_themes[$theme] = $theme;
}

/**
* Get the fields that are sent to the CMS. In
* your extensions: updateCMSFields($fields)
*
* @return FieldList
*/
function getCMSFields($params = null) {
Requirements::javascript(CMS_DIR . "/javascript/SitetreeAccess.js");

$groupsMap = DataList::create('Group')->map('ID', 'Breadcrumbs')->toArray();
asort($groupsMap);

$fields = new FieldList(
new TabSet("Root",
$tabMain = new Tab('Main',
$titleField = new TextField("Title", _t('SiteConfig.SITETITLE', "Site title")),
$taglineField = new TextField("Tagline", _t('SiteConfig.SITETAGLINE', "Site Tagline/Slogan")),
new DropdownField("Theme", _t('SiteConfig.THEME', 'Theme'), $this->getAvailableThemes(), '', null, _t('SiteConfig.DEFAULTTHEME', '(Use default theme)'))
),
$tabAccess = new Tab('Access',
$viewersOptionsField = new OptionsetField("CanViewType", _t('SiteConfig.VIEWHEADER', "Who can view pages on this site?")),
$viewerGroupsField = ListboxField::create("ViewerGroups", _t('SiteTree.VIEWERGROUPS', "Viewer Groups"))
->setMultiple(true)->setSource($groupsMap),
$editorsOptionsField = new OptionsetField("CanEditType", _t('SiteConfig.EDITHEADER', "Who can edit pages on this site?")),
$editorGroupsField = ListboxField::create("EditorGroups", _t('SiteTree.EDITORGROUPS', "Editor Groups"))
->setMultiple(true)->setSource($groupsMap),
$topLevelCreatorsOptionsField = new OptionsetField("CanCreateTopLevelType", _t('SiteConfig.TOPLEVELCREATE', "Who can create pages in the root of the site?")),
$topLevelCreatorsGroupsField = ListboxField::create("CreateTopLevelGroups", _t('SiteTree.TOPLEVELCREATORGROUPS', "Top level creators"))
->setMultiple(true)->setSource($groupsMap)
)
)
);

$viewersOptionsSource = array();
$viewersOptionsSource["Anyone"] = _t('SiteTree.ACCESSANYONE', "Anyone");
$viewersOptionsSource["LoggedInUsers"] = _t('SiteTree.ACCESSLOGGEDIN', "Logged-in users");
$viewersOptionsSource["OnlyTheseUsers"] = _t('SiteTree.ACCESSONLYTHESE', "Only these people (choose from list)");
$viewersOptionsField->setSource($viewersOptionsSource);

$editorsOptionsSource = array();
$editorsOptionsSource["LoggedInUsers"] = _t('SiteTree.EDITANYONE', "Anyone who can log-in to the CMS");
$editorsOptionsSource["OnlyTheseUsers"] = _t('SiteTree.EDITONLYTHESE', "Only these people (choose from list)");
$editorsOptionsField->setSource($editorsOptionsSource);

$topLevelCreatorsOptionsField->setSource($editorsOptionsSource);

// Translatable doesn't handle updateCMSFields on DataObjects,
// so add it here to save the current Locale,
// because onBeforeWrite does not work.
if(class_exists('Translatable') && Object::has_extension('SiteConfig',"Translatable")){
$fields->push(new HiddenField("Locale"));
}

if (!Permission::check('EDIT_SITECONFIG')) {
$fields->makeFieldReadonly($viewersOptionsField);
$fields->makeFieldReadonly($viewerGroupsField);
$fields->makeFieldReadonly($editorsOptionsField);
$fields->makeFieldReadonly($editorGroupsField);
$fields->makeFieldReadonly($topLevelCreatorsOptionsField);
$fields->makeFieldReadonly($topLevelCreatorsGroupsField);
$fields->makeFieldReadonly($taglineField);
$fields->makeFieldReadonly($titleField);
}

if(file_exists(BASE_PATH . '/install.php')) {
$fields->addFieldToTab("Root.Main", new LiteralField("InstallWarningHeader",
"<p class=\"message warning\">" . _t("SiteTree.REMOVE_INSTALL_WARNING",
"Warning: You should remove install.php from this SilverStripe install for security reasons.")
. "</p>"), "Title");
}

$tabMain->setTitle(_t('SiteConfig.TABMAIN', "Main"));
$tabAccess->setTitle(_t('SiteConfig.TABACCESS', "Access"));
$this->extend('updateCMSFields', $fields);

return $fields;
}

/**
* Get all available themes that haven't been marked as disabled.
* @param string $baseDir Optional alternative theme base directory for testing
* @return array of theme directory names
*/
public function getAvailableThemes($baseDir = null) {
$themes = SSViewer::get_themes($baseDir);
foreach(self::$disabled_themes as $theme) {
if(isset($themes[$theme])) unset($themes[$theme]);
}
return $themes;
}

/**
* Get the actions that are sent to the CMS. In
* your extensions: updateEditFormActions($actions)
*
* @return Fieldset
*/
function getCMSActions() {
if (Permission::check('ADMIN') || Permission::check('EDIT_SITECONFIG')) {
$actions = new FieldList(
FormAction::create('save_siteconfig', _t('CMSMain.SAVE','Save'))
->addExtraClass('ss-ui-action-constructive')->setAttribute('data-icon', 'accept')
);
} else {
$actions = new FieldList();
}

$this->extend('updateCMSActions', $actions);

return $actions;
}

/**
* Get the current sites SiteConfig, and creates a new one
* through {@link make_site_config()} if none is found.
*
* @param string $locale
* @return SiteConfig
*/
static function current_site_config($locale = null) {
if(class_exists('Translatable') && Object::has_extension('SiteConfig',"Translatable")){
$locale = isset($locale) ? $locale : Translatable::get_current_locale();
$siteConfig = Translatable::get_one_by_locale('SiteConfig', $locale);
} else {
$siteConfig = DataObject::get_one('SiteConfig');
}

if (!$siteConfig) $siteConfig = self::make_site_config($locale);

return $siteConfig;
}

/**
* Setup a default SiteConfig record if none exists
*/
function requireDefaultRecords() {
parent::requireDefaultRecords();
$siteConfig = DataObject::get_one('SiteConfig');
if(!$siteConfig) {
self::make_site_config();
DB::alteration_message("Added default site config","created");
}
}

/**
* Create SiteConfig with defaults from language file.
* if Translatable is enabled on SiteConfig, see if one already exist
* and use those values for the translated defaults.
*
* @param string $locale
* @return SiteConfig
*/
static function make_site_config($locale = null) {
if(class_exists('Translatable') && !$locale) $locale = Translatable::get_current_locale();

$siteConfig = new SiteConfig();
$siteConfig->Title = _t('SiteConfig.SITENAMEDEFAULT',"Your Site Name");
$siteConfig->Tagline = _t('SiteConfig.TAGLINEDEFAULT',"your tagline here");

if(class_exists('Translatable') && $siteConfig->hasExtension('Translatable')){
$defaultConfig = DataObject::get_one('SiteConfig');
if($defaultConfig){
$siteConfig->Title = $defaultConfig->Title;
$siteConfig->Tagline = $defaultConfig->Tagline;
}

// TODO Copy view/edit group settings

// set the correct Locale
$siteConfig->Locale = $locale;
}

$siteConfig->write();

return $siteConfig;
  }

/**
* Can a user view pages on this site? This method is only
* called if a page is set to Inherit, but there is nothing
* to inherit from.
*
* @param mixed $member
* @return boolean
*/
public function canView($member = null) {
if(!$member) $member = Member::currentUserID();
if($member && is_numeric($member)) $member = DataObject::get_by_id('Member', $member);

if ($member && Permission::checkMember($member, "ADMIN")) return true;

if (!$this->CanViewType || $this->CanViewType == 'Anyone') return true;

// check for any logged-in users
if($this->CanViewType == 'LoggedInUsers' && $member) return true;

// check for specific groups
if($this->CanViewType == 'OnlyTheseUsers' && $member && $member->inGroups($this->ViewerGroups())) return true;

return false;
}

/**
* Can a user edit pages on this site? This method is only
* called if a page is set to Inherit, but there is nothing
* to inherit from.
*
* @param mixed $member
* @return boolean
*/
public function canEdit($member = null) {
if(!$member) $member = Member::currentUserID();
if($member && is_numeric($member)) $member = DataObject::get_by_id('Member', $member);

if ($member && Permission::checkMember($member, "ADMIN")) return true;

// check for any logged-in users
if(!$this->CanEditType || $this->CanEditType == 'LoggedInUsers' && $member) return true;

// check for specific groups
if($this->CanEditType == 'OnlyTheseUsers' && $member && $member->inGroups($this->EditorGroups())) return true;

return false;
}

function providePermissions() {
return array(
'EDIT_SITECONFIG' => array(
'name' => _t('SiteConfig.EDIT_PERMISSION', 'Manage site configuration'),
'category' => _t('Permissions.PERMISSIONS_CATEGORY', 'Roles and access permissions'),
'help' => _t('SiteConfig.EDIT_PERMISSION_HELP', 'Ability to edit global access settings/top-level page permissions.'),
'sort' => 400
)
);
}

/**
* Can a user create pages in the root of this site?
*
* @param mixed $member
* @return boolean
*/
public function canCreateTopLevel($member = null) {
if(!$member || !(is_a($member, 'Member')) || is_numeric($member)) {
$member = Member::currentUserID();
}

if (Permission::check('ADMIN')) return true;

if ($member && Permission::checkMember($member, "ADMIN")) return true;

// check for any logged-in users
if($this->CanCreateTopLevelType == 'LoggedInUsers' && $member) return true;

// check for specific groups
if($member && is_numeric($member)) $member = DataObject::get_by_id('Member', $member);
if($this->CanCreateTopLevelType == 'OnlyTheseUsers' && $member && $member->inGroups($this->CreateTopLevelGroups())) return true;


return false;
}
}
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