<?php
/**
 * Plugin Name: Gitium
 * Version: 1.0.3
 * Author: Presslabs
 * Author URI: https://www.presslabs.com
 * License: GPL2
 * Description: Keep all your code on git version control system.
 * Text Domain: gitium
 * Domain Path: /languages/
 */
/*  Copyright 2014-2016 Presslabs SRL <ping@presslabs.com>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License, version 2, as
    published by the Free Software Foundation.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

define( 'GITIUM_LAST_COMMITS', 20 );
define( 'GITIUM_MIN_GIT_VER', '1.7' );
define( 'GITIUM_MIN_PHP_VER', '5.6' );

if ( is_multisite() ) {
	define( 'GITIUM_ADMIN_MENU_ACTION', 'network_admin_menu' );
	define( 'GITIUM_ADMIN_NOTICES_ACTION', 'network_admin_notices' );
	define( 'GITIUM_MANAGE_OPTIONS_CAPABILITY', 'manage_network_options' );
} else {
	define( 'GITIUM_ADMIN_MENU_ACTION', 'admin_menu' );
	define( 'GITIUM_ADMIN_NOTICES_ACTION', 'admin_notices' );
	define( 'GITIUM_MANAGE_OPTIONS_CAPABILITY', 'manage_options' );
}

require_once __DIR__ . '/functions.php';
require_once __DIR__ . '/inc/class-git-wrapper.php';
require_once __DIR__ . '/inc/class-gitium-requirements.php';
require_once __DIR__ . '/inc/class-gitium-admin.php';
require_once __DIR__ . '/inc/class-gitium-help.php';
require_once __DIR__ . '/inc/class-gitium-menu.php';
require_once __DIR__ . '/inc/class-gitium-menu-bubble.php';
require_once __DIR__ . '/inc/class-gitium-submenu-configure.php';
require_once __DIR__ . '/inc/class-gitium-submenu-status.php';
require_once __DIR__ . '/inc/class-gitium-submenu-commits.php';
require_once __DIR__ . '/inc/class-gitium-submenu-settings.php';

function gitium_load_textdomain() {
	load_plugin_textdomain( 'gitium', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );
}
add_action( 'plugins_loaded', 'gitium_load_textdomain' );

function _gitium_make_ssh_git_file_exe() {
	$ssh_wrapper = dirname( __FILE__ ) . '/inc/ssh-git';
	$process = proc_open(
		"chmod -f +x $ssh_wrapper",
		array(
			0 => array( 'pipe', 'r' ),  // stdin
			1 => array( 'pipe', 'w' ),  // stdout
		),
		$pipes
	);
	if ( is_resource( $process ) ) {
		fclose( $pipes[0] );
		proc_close( $process );
	}
}
register_activation_hook( __FILE__, '_gitium_make_ssh_git_file_exe' );

function gitium_deactivation() {
	delete_transient( 'gitium_git_version' );
}
register_deactivation_hook( __FILE__, 'gitium_deactivation' );

function gitium_uninstall_hook() {
	delete_transient( 'gitium_remote_tracking_branch' );
	delete_transient( 'gitium_remote_disconnected' );
	delete_transient( 'gitium_uncommited_changes' );
	delete_transient( 'gitium_git_version' );
	delete_transient( 'gitium_versions' );
	delete_transient( 'gitium_menu_bubble' );
	delete_transient( 'gitium_is_status_working' );

	delete_option( 'gitium_keypair' );
	delete_option( 'gitium_webhook_key' );
}
register_uninstall_hook( __FILE__, 'gitium_uninstall_hook' );

/* Array
(
    [themes] => Array
        (
            [twentytwelve] => `Twenty Twelve` version 1.3
        )
    [plugins] => Array
        (
            [cron-view/cron-gui.php] => `Cron GUI` version 1.03
            [hello-dolly/hello.php] => `Hello Dolly` version 1.6
        )

) */
function gitium_update_versions() {
	$new_versions = [];

	// get all themes from WP
	$all_themes = wp_get_themes( array( 'allowed' => true ) );
	foreach ( $all_themes as $theme_name => $theme ) :
		$theme_versions[ $theme_name ] = array(
			'name'    => $theme->Name,
			'version' => null,
			'msg'     => '',
		);
		$theme_versions[ $theme_name ]['msg'] = '`' . $theme->Name . '`';
		$version = $theme->Version;
		if ( ! empty( $version ) ) {
			$theme_versions[ $theme_name ]['msg']     .= " version $version";
			$theme_versions[ $theme_name ]['version'] .= $version;
		}
	endforeach;

	if ( ! empty( $theme_versions ) ) {
		$new_versions['themes'] = $theme_versions;
	}
	// get all plugins from WP
	if ( ! function_exists( 'get_plugins' ) ) {
		require_once ABSPATH . 'wp-admin/includes/plugin.php';
	}
	$all_plugins = get_plugins();
	foreach ( $all_plugins as $name => $data ) :
		$plugin_versions[ $name ] = array(
			'name'    => $data['Name'],
			'version' => null,
			'msg'     => '',
		);
		$plugin_versions[ $name ]['msg'] = "`{$data['Name']}`";
		if ( ! empty( $data['Version'] ) ) {
			$plugin_versions[ $name ]['msg']     .= ' version ' . $data['Version'];
			$plugin_versions[ $name ]['version'] .= $data['Version'];
		}
	endforeach;

	if ( ! empty( $plugin_versions ) ) {
		$new_versions['plugins'] = $plugin_versions;
	}

	set_transient( 'gitium_versions', $new_versions );

	return $new_versions;
}
add_action( 'load-plugins.php', 'gitium_update_versions', 999 );

function gitium_upgrader_post_install( $res, $hook_extra, $result ) {
	_gitium_make_ssh_git_file_exe();

	$action = null;
	$type   = null;

	// install logic
	if ( isset( $hook_extra['type'] ) && ( 'plugin' === $hook_extra['type'] ) ) {
		$action = 'installed';
		$type   = 'plugin';
	} else if ( isset( $hook_extra['type'] ) && ( 'theme' === $hook_extra['type'] ) ) {
		$action = 'installed';
		$type   = 'theme';
        }

	// update/upgrade logic
	if ( isset( $hook_extra['plugin'] ) ) {
		$action = 'updated';
		$type   = 'plugin';
	} else if ( isset( $hook_extra['theme'] ) ) {
		$action = 'updated';
		$type   = 'theme';
	}

	// get action if missed above
	if ( isset( $hook_extra['action'] ) ) {
		$action = $hook_extra['action'];
		if ( 'install' === $action ) {
			$action = 'installed';
		}
		if ( 'update' === $action ) {
			$action = 'updated';
		}
	}

	if ( WP_DEBUG ) {
		error_log( __FUNCTION__ . ':hook_extra:' . serialize( $hook_extra ) );
		error_log( __FUNCTION__ . ':action:type:' . $action . ':' . $type );
	}

	$git_dir = $result['destination'];
	$version = '';

	if ( ABSPATH == substr( $git_dir, 0, strlen( ABSPATH ) ) ) {
		$git_dir = substr( $git_dir, strlen( ABSPATH ) );
	}
	switch ( $type ) {
		case 'theme':
			wp_clean_themes_cache();
			$theme_data = wp_get_theme( $result['destination_name'] );
			$name       = $theme_data->get( 'Name' );
			$version    = $theme_data->get( 'Version' );
		break;
		case 'plugin':
			foreach ( $result['source_files'] as $file ) :
				if ( '.php' != substr( $file, -4 ) ) { continue; }
				// every .php file is a possible plugin so we check if it's a plugin
				$filepath    = trailingslashit( $result['destination'] ) . $file;
				$plugin_data = get_plugin_data( $filepath );
				if ( $plugin_data['Name'] ) :
					$name    = $plugin_data['Name'];
					$version = $plugin_data['Version'];
					// We get info from the first plugin in the package
					break;
				endif;
			endforeach;
		break;
	}
	if ( empty( $name ) ) {
		$name = $result['destination_name'];
	}
	$commit_message = _gitium_format_message( $name,$version,"$action $type" );
	$commit = _gitium_commit_changes( $commit_message, $git_dir, false );
	gitium_merge_and_push( $commit );

	return $res;
}
add_filter( 'upgrader_post_install', 'gitium_upgrader_post_install', 10, 3 );

// Checks for local changes, tries to group them by plugin/theme and pushes the changes
function gitium_auto_push( $msg_prepend = '' ) {
	global $git;
	list( , $git_private_key ) = gitium_get_keypair();
	if ( ! $git_private_key )
		return;
	$git->set_key( $git_private_key );

	$commits = gitium_group_commit_modified_plugins_and_themes( $msg_prepend );
	gitium_merge_and_push( $commits );
	gitium_update_versions();
}
add_action( 'upgrader_process_complete', 'gitium_auto_push', 11, 0 );

function gitium_check_after_activate_modifications( $plugin ) {
	gitium_check_after_event( $plugin );
}
add_action( 'activated_plugin', 'gitium_check_after_activate_modifications', 999 );

function gitium_check_after_deactivate_modifications( $plugin ) {
	gitium_check_after_event( $plugin, 'deactivation' );
}
add_action( 'deactivated_plugin', 'gitium_check_after_deactivate_modifications', 999 );

function gitium_check_for_plugin_deletions() { // Handle plugin deletion
    // $_GET['deleted'] used to resemble if a plugin has been deleted (true)
    // ...meanwhile commit b28dd45f3dad19f0e06c546fdc89ed5b24bacd72 in github.com/WordPress/WordPress...
    // Now it resembles the number of deleted plugins (a number). Thanks WP
	if ( isset( $_GET['deleted'] ) && ( 1 <= (int) $_GET['deleted'] || 'true' == $_GET['deleted'] ) ) {
		gitium_auto_push();
	}
}
add_action( 'load-plugins.php', 'gitium_check_for_plugin_deletions' );

add_action( 'wp_ajax_wp-plugin-delete-success', 'gitium_auto_push' );
add_action( 'wp_ajax_wp-theme-delete-success', 'gitium_auto_push' );

function gitium_wp_plugin_delete_success() {
?>
	<script type='text/javascript'>
			jQuery(document).ready(function() {
					jQuery(document).on( 'wp-plugin-delete-success', function() {
							jQuery.post(ajaxurl, data={'action': 'wp-plugin-delete-success'});
					});
			});
	</script>
<?php
}
add_action( 'admin_head', 'gitium_wp_plugin_delete_success' );

function gitium_wp_theme_delete_success() {
?>
	<script type='text/javascript'>
			jQuery(document).ready(function() {
					jQuery(document).on( 'wp-theme-delete-success', function() {
							jQuery.post(ajaxurl, data={'action': 'wp-theme-delete-success'});
					});
			});
	</script>
<?php
}
add_action( 'admin_head', 'gitium_wp_theme_delete_success' );

function gitium_check_for_themes_deletions() { // Handle theme deletion
	if ( isset( $_GET['deleted'] ) && 'true' == $_GET['deleted'] ) {
		gitium_auto_push();
	}
}
add_action( 'load-themes.php', 'gitium_check_for_themes_deletions' );

// Deprecated function - backward compatibility
function gitium_hook_plugin_and_theme_editor_page( $hook )
{
    switch ($hook) {
        case 'plugin-editor.php':
            if (isset($_GET['a']) && 'te' == $_GET['a']) {
                gitium_auto_push();
            }
            break;

        case 'theme-editor.php':
            if (isset($_GET['updated']) && 'true' == $_GET['updated']) {
                gitium_auto_push();
            }
            break;
    }

    return;
}

/*
 * We execute the "gitium_auto_push" on "wp_die_ajax_handler" filter to make sure we are
 * at the end of our request and the latest file is saved on disk.
 */
function gitium_check_ajax_success_call($callback)
{
    gitium_auto_push();

    return $callback;
}

/*
 * We add this filer on "wp_die_ajax_handler" since our action executes before the actual file is saved on disk
 * which results in a race condition that would commit only the previously saved data not the
 * currently saved one.
 */
function add_filter_for_ajax_save()
{
	add_filter('wp_die_ajax_handler', 'gitium_check_ajax_success_call', 1);
}

/*
 * We need to apply different filters while checking for WP version to maintain
 * backworks compatibility since the Code Editor has changed drastically
 * with the 4.9 WP update.
 */
if ( version_compare( $GLOBALS['wp_version'], '4.9', '>=' ) )
    add_action( 'wp_ajax_edit-theme-plugin-file', 'add_filter_for_ajax_save', 1, 0 );
else
    add_action( 'admin_enqueue_scripts', 'gitium_hook_plugin_and_theme_editor_page' );

function gitium_options_page_check() {
	global $git;
	if ( ! $git->can_exec_git() ) { wp_die( 'Cannot exec git' ); }
	return true;
}

function gitium_remote_disconnected_notice() {
	if ( current_user_can( GITIUM_MANAGE_OPTIONS_CAPABILITY ) && $message = get_transient( 'gitium_remote_disconnected' ) ) : ?>
		<div class="error-nag error">
			<p>
				Could not connect to remote repository.
				<pre><?php echo esc_html( $message ); ?></pre>
			</p>
		</div>
	<?php endif;
}
add_action( 'admin_notices', 'gitium_remote_disconnected_notice' );