),
		);
	}

	public function enqueueTabStyles() {
		parent::enqueueTabStyles();
		wp_enqueue_auto_versioned_style(
			'ame-tweak-manager-css',
			plugins_url('tweaks.css', __FILE__)
		);
	}

	public function handleSettingsForm($post = array()) {
		parent::handleSettingsForm($post);

		$submittedSettings = json_decode($post['settings'], true);

		//To save space, filter out tweaks that are not enabled for anyone and have no other settings.
		//Most tweaks only have "id" and "enabledForActor" properties.
		$basicProperties = array('id' => true, 'enabledForActor' => true);
		$submittedSettings['tweaks'] = array_filter(
			$submittedSettings['tweaks'],
			function ($settings) use ($basicProperties) {
				if ( !empty($settings['enabledForActor']) ) {
					return true;
				}
				$additionalProperties = array_diff_key($settings, $basicProperties);
				return !empty($additionalProperties);
			}
		);

		//User-defined tweaks must have a type.
		$submittedSettings['tweaks'] = array_filter(
			$submittedSettings['tweaks'],
			function ($settings) {
				return empty($settings['isUserDefined']) || !empty($settings['typeId']);
			}
		);

		//TODO: Give other components an opportunity to validate and sanitize tweak settings. E.g. a filter.
		//Sanitize CSS with FILTER_SANITIZE_FULL_SPECIAL_CHARS if unfiltered_html is not enabled. Always strip </style>.

		//Build a lookup array of user-defined tweaks so that we can register them later
		//without iterating through the entire list.
		$userDefinedTweakIds = array();
		foreach ($submittedSettings['tweaks'] as $properties) {
			if ( !empty($properties['isUserDefined']) && !empty($properties['id']) ) {
				$userDefinedTweakIds[$properties['id']] = true;
			}
		}

		//We use an incrementing suffix to ensure each user-defined tweak gets a unique ID.
		$lastUserTweakSuffix = ameUtils::get($this->loadSettings(), 'lastUserTweakSuffix', 0);
		$newSuffix = ameUtils::get($submittedSettings, 'lastUserTweakSuffix', 0);
		if ( is_scalar($newSuffix) && is_numeric($newSuffix) ) {
			$newSuffix = max(intval($newSuffix), 0);
			if ( $newSuffix < 10000000 ) {
				$lastUserTweakSuffix = $newSuffix;
			}
		}

		$this->settings['tweaks'] = $submittedSettings['tweaks'];
		$this->settings['userDefinedTweaks'] = $userDefinedTweakIds;
		$this->settings['lastUserTweakSuffix'] = $lastUserTweakSuffix;
		$this->saveSettings();

		$params = array('updated' => 1);
		if ( !empty($post['selected_actor']) ) {
			$params['selected_actor'] = strval($post['selected_actor']);
		}

		wp_redirect($this->getTabUrl($params));
		exit;
	}
}

class ameTweakSection {
	private $id;
	private $label;

	private $priority = 0;

	public function __construct($id, $label) {
		$this->id = $id;
		$this->label = $label;
	}

	public function getId() {
		return $this->id;
	}

	public function getLabel() {
		return $this->label;
	}

	public function getPriority() {
		return $this->priority;
	}

	public function setPriority($priority) {
		$this->priority = $priority;
		return $this;
	}
}