<?php 

if( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly

if( ! class_exists('ACF_Admin_Updates') ) :

class ACF_Admin_Updates {
	
	/** @var array Data used in the view. */
	var $view = array();
	
	/**
	 * __construct
	 *
	 * Sets up the class functionality.
	 *
	 * @date	23/06/12
	 * @since	5.0.0
	 *
	 * @param	void
	 * @return	void
	 */
	function __construct() {
	
		// Add actions.
		add_action( 'admin_menu', array($this, 'admin_menu'), 20 );
	}
	
	/**
	 * display_wp_error
	 *
	 * Adds an admin notice using the provided WP_Error.
	 *
	 * @date	14/1/19
	 * @since	5.7.10
	 *
	 * @param	WP_Error $wp_error The error to display.
	 * @return	void
	 */
	function display_wp_error( $wp_error ) {
		
		// Only show one error on page.
		if( acf_has_done('display_wp_error') ) {
			return;
		}
		
		// Create new notice.
		acf_new_admin_notice(array(
			'text'	=> __('<b>Error</b>. Could not connect to update server', 'acf') . ' <span class="description">(' . esc_html( $wp_error->get_error_message() ) . ').</span>',
			'type'	=> 'error'
		));	
	}
	
	/**
	 * get_changelog_changes
	 *
	 * Finds the specific changes for a given version from the provided changelog snippet.
	 *
	 * @date	14/1/19
	 * @since	5.7.10
	 *
	 * @param	string $changelog The changelog text.
	 * @param	string $version The version to find.
	 * @return	string
	 */
	function get_changelog_changes( $changelog = '', $version = '' ) {
		
		// Explode changelog into sections.
		$bits = array_filter( explode('<h4>', $changelog) );
		
		// Loop over each version chunk.
		foreach( $bits as $bit ) {
			
			// Find the version number for this chunk.
			$bit = explode('</h4>', $bit);
			$bit_version = trim( $bit[0] );
	    	$bit_text = trim( $bit[1] );
			
			// Compare the chunk version number against param and return HTML.
			if( acf_version_compare($bit_version, '==', $version) ) {
	        	return '<h4>' . esc_html($bit_version) . '</h4>' . acf_esc_html($bit_text);
	    	}
		}
		
		// Return.
		return '';
	}
	
	/**
	 * admin_menu
	 *
	 * Adds the admin menu subpage.
	 *
	 * @date	28/09/13
	 * @since	5.0.0
	 *
	 * @param	void
	 * @return	void
	 */
	function admin_menu() {
		
		// Bail early if no show_admin.
		if( !acf_get_setting('show_admin') ) {
			return;
		}
		
		// Bail early if no show_updates.
		if( !acf_get_setting('show_updates') ) {
			return;
		}
		
		// Bail early if not a plugin (included in theme).
		if( !acf_is_plugin_active() ) {
			return;
		}
		
		// Add submenu.
		$page = add_submenu_page( 'edit.php?post_type=acf-field-group', __('Updates','acf'), __('Updates','acf'), acf_get_setting('capability'), 'acf-settings-updates', array($this,'html') );
		
		// Add actions to page.
		add_action( "load-$page", array($this,'load') );
	}
	
	/**
	 * load
	 *
	 * Runs when loading the submenu page.
	 *
	 * @date	7/01/2014
	 * @since	5.0.0
	 *
	 * @param	void
	 * @return	void
	 */
	function load() {
		
		// Check activate.
		if( acf_verify_nonce('activate_pro_licence') ) {
			$this->activate_pro_licence();
		
		// Check deactivate.
		} elseif( acf_verify_nonce('deactivate_pro_licence') ) {
			$this->deactivate_pro_licence();
		}
		
		// vars
		$license = acf_pro_get_license_key();
		$this->view = array(
			'license'			=> $license,
			'active'			=> $license ? 1 : 0,
			'current_version'	=> acf_get_setting('version'),
			'remote_version'	=> '',
			'update_available'	=> false,
			'changelog'			=> '',
			'upgrade_notice'	=> ''
		);
		
		// get plugin updates
		$force_check = !empty( $_GET['force-check'] );
		$info = acf_updates()->get_plugin_info('pro', $force_check);
		
		// Display error.
		if( is_wp_error($info) ) {
			return $this->display_wp_error( $info );
		}
		
        // add info to view
        $this->view['remote_version'] = $info['version'];
        
        // add changelog if the remote version is '>' than the current version
        $version = acf_get_setting('version');
		
	    // check if remote version is higher than current version
		if( version_compare($info['version'], $version, '>') ) {
			
			// update view
        	$this->view['update_available'] = true;
        	$this->view['changelog'] = $this->get_changelog_changes($info['changelog'], $info['version']);
        	$this->view['upgrade_notice'] = $this->get_changelog_changes($info['upgrade_notice'], $info['version']);
        	
        	// perform update checks if license is active
        	$basename = acf_get_setting('basename');
        	$update = acf_updates()->get_plugin_update( $basename );
        	if( $license ) {
	        	
	        	// display error if no package url
	        	// - possible if license key has been modified
	        	if( $update && !$update['package'] ) {
		        	$this->view['update_available'] = false;
		        	acf_new_admin_notice(array(
						'text'	=> __('<b>Error</b>. Could not authenticate update package. Please check again or deactivate and reactivate your ACF PRO license.', 'acf'),
						'type'	=> 'error'
					));	
	        	}
	        	
	        	// refresh transient
	        	// - if no update exists in the transient
	        	// - or if the transient 'new_version' is stale
	        	if( !$update || $update['new_version'] !== $info['version'] ) {
		        	acf_updates()->refresh_plugins_transient();
	        	}
        	}
        }
	}
	
	/**
	 * activate_pro_licence
	 *
	 * Activates the submitted license key.
	 *
	 * @date	16/01/2014
	 * @since	5.0.0
	 *
	 * @param	void
	 * @return	void
	 */
	function activate_pro_licence() {
		
		// Connect to API.
		$post = array(
			'acf_license'	=> trim($_POST['acf_pro_licence']),
			'acf_version'	=> acf_get_setting('version'),
			'wp_name'		=> get_bloginfo('name'),
			'wp_url'		=> home_url(),
			'wp_version'	=> get_bloginfo('version'),
			'wp_language'	=> get_bloginfo('language'),
			'wp_timezone'	=> get_option('timezone_string'),
		);
		$response = acf_updates()->request('v2/plugins/activate?p=pro', $post);
		
		// Check response is expected JSON array (not string).
		if( is_string($response) ) {
			$response = new WP_Error( 'server_error', esc_html($response) );
		}
		
		// Display error.
		if( is_wp_error($response) ) {
			return $this->display_wp_error( $response );
		}

		// On success.
		if( $response['status'] == 1 ) {
			
			// Update license.
			acf_pro_update_license( $response['license'] );
			
			// Refresh plugins transient to fetch new update data.
			acf_updates()->refresh_plugins_transient();
			
			// Show notice.
			acf_add_admin_notice( $response['message'], 'success' );
		
		// On failure.	
		} else {
			
			// Show notice.
			acf_add_admin_notice( $response['message'], 'warning' );
		}
	}
	
	/**
	 * activate_pro_licence
	 *
	 * Deactivates the registered license key.
	 *
	 * @date	16/01/2014
	 * @since	5.0.0
	 *
	 * @param	void
	 * @return	void
	 */
	function deactivate_pro_licence() {
		
		// Get license key.
		$license = acf_pro_get_license_key();
		
		// Bail early if no key.
		if( !$license ) {
			return;
		}
		
		// Connect to API.
		$post = array(
			'acf_license'	=> $license,
			'wp_url'		=> home_url(),
		);
		$response = acf_updates()->request('v2/plugins/deactivate?p=pro', $post);
		
		
		// Check response is expected JSON array (not string).
		if( is_string($response) ) {
			$response = new WP_Error( 'server_error', esc_html($response) );
		}
		
		// Display error.
		if( is_wp_error($response) ) {
			return $this->display_wp_error( $response );
		}
		
		// Remove license key from DB.
		acf_pro_update_license('');
		
		// Refresh plugins transient to fetch new update data.
		acf_updates()->refresh_plugins_transient();
			
		// On success.
		if( $response['status'] == 1 ) {
			
			// Show notice.
			acf_add_admin_notice( $response['message'], 'info' );
			
		// On failure.	
		} else {
			
			// Show notice.
			acf_add_admin_notice( $response['message'], 'warning' );
		}
	}
	
	/**
	 * html
	 *
	 * Displays the submenu page's HTML.
	 *
	 * @date	7/01/2014
	 * @since	5.0.0
	 *
	 * @param	void
	 * @return	void
	 */
	function html() {
		acf_get_view( dirname(__FILE__) . '/views/html-settings-updates.php', $this->view);
	}
}

// Initialize.
acf_new_instance('ACF_Admin_Updates');

endif; // class_exists check
