<?php

class BetterNavigator extends DataExtension {

	/**
	 * Nominate developers who can access developer tools on live site
	 * Example YAML:
	 * 
	 * BetterNavigator:
	 *   developers:
	 *     - 'dev@yoursite.com'
	 *     - 'otherdev@yoursite.com' 
	 * 
	 * @config
	 * @var array
	 */
	private static $developers;

	/**
	 * Provides a front-end utility menu with administrative functions and developer tools
	 * Relies on SilverStripeNavigator
	 * 
	 * @return string
	 */
	public function BetterNavigator() {
		$isDev = Director::isDev();

		if($isDev || Permission::check('CMS_ACCESS_CMSMain') || Permission::check('VIEW_DRAFT_CONTENT')) {
			if($this->owner && $this->owner->dataRecord && $this->owner->dataRecord instanceof SiteTree) {

				//Get SilverStripeNavigator links & stage info (CMS/Stage/Live/Archive)
				$nav = array();
				$navigator = new SilverStripeNavigator($this->owner->dataRecord);
				$items = $navigator->getItems();
				foreach($items as $item) {
					$nav[$item->getName()] = array(
						'Link' => $item->getLink(),
						'Active' => $item->isActive()
					);
				}
				
				//Is the logged in member nominated as a developer?
				$member = Member::currentUser();
				$devs = Config::inst()->get('BetterNavigator', 'developers');
				$isDeveloper = $member && is_array($devs) ? in_array($member->Email, $devs) : false;
				
				//Add other data for template
				$nav = array_merge($nav, array(
					'Member' => $member,
					'Stage' => Versioned::current_stage(),
					'LoginLink' => Config::inst()->get('Security', 'login_url'),
					'Mode' => Director::get_environment_type(),
					'CanEdit' => Permission::check('BETTERNAVIGATOR_CANEDIT'),
					'IsDeveloper' => $isDeveloper
				));
				
				//Merge with page data, send to template and render
				$nav = new ArrayData($nav);
				$page = $this->owner->customise($nav);
				return $page->renderWith('BetterNavigator');
			}
		}
		return false;
	}
}

class BetterNavigator_Permissions extends Extension implements PermissionProvider
{
	/**
	 * Provide permissions for viewing better navigator on the front end
	 *
	 * @return array
	 */
	public function providePermissions()
	{
		return array(
			"BETTERNAVIGATOR_CANEDIT" => array(
				'name' => 'Show Better Navigator `Edit in CMS` Option',
				'category' => 'Front End'
			)
		);
	}

	public function requireDefaultRecords()
	{
		$contentGroup = Group::get()->filter('code', 'content-authors')->first();
		$previousPermissions = Permission::get()->filter('Code', 'BETTERNAVIGATOR_CANEDIT');

		if ($contentGroup && $contentGroup->exists() && !$previousPermissions->count()) {
			Permission::create(
				array(
					'Code' => 'BETTERNAVIGATOR_CANEDIT',
					'Type' => 1,
					'GroupID' => $contentGroup->ID
				)
			)->write();

			DB::alteration_message('Default Better Navigator permissions created', 'created');
		}
	}
}