<?php
/*
Plugin Name: Pau-Updater
Plugin URI: http://www.paucapo.com
Description: Plugins updater
Version: 0.1
Author: Pau Capó
Author URI:  http://www.paucapo.com
Gitea Host: https://git.paucapo.com/
Gitea URI: wp/pau-updater
*/

/*
TODO:
* access_token saved for host
* branches?
*/


defined( 'ABSPATH' ) or exit;

class Pau_Updater {
   public $update_data = array();
   public $active_plugins = array();


   function __construct() {
      add_action( 'admin_init', array( $this, 'admin_init' ) );
      add_filter( 'plugins_api', array( $this, 'plugins_api' ), 10, 3 );
      add_filter( 'pre_set_site_transient_update_plugins', array( $this, 'set_update_data' ) );
      add_filter( 'upgrader_source_selection', array( $this, 'upgrader_source_selection' ), 10, 4 );
      add_filter( 'extra_plugin_headers', array( $this, 'extra_plugin_headers' ) );
   }


   function admin_init() {
      $now = strtotime( 'now' );
      $last_checked = (int) get_option( 'ghu_last_checked' );
      $check_interval = 0;//apply_filters( 'ghu_check_interval', ( 60 * 60 * 12 ) );
      $this->update_data = (array) get_option( 'ghu_update_data' );
      $active = (array) get_option( 'active_plugins' );

      foreach ( $active as $slug ) {
         $this->active_plugins[ $slug ] = true;
      }

      // transient expiration
      if ( ( $now - $last_checked ) > $check_interval ) {
         $this->update_data = $this->get_gitea_updates();

         update_option( 'ghu_update_data', $this->update_data );
         update_option( 'ghu_last_checked', $now );
      }
   }

   function get_gitea_updates() {
      $plugin_data = array();
      $plugins = get_plugins();
      foreach ( $plugins as $slug => $info ) {
         if ( isset( $this->active_plugins[ $slug ] ) && ! empty( $info['Gitea URI'] ) && ! empty( $info['Gitea Host'] ) ) {
            $temp = array(
               'plugin'            => $slug,
               'slug'              => trim( dirname( $slug ), '/' ),
               'file'              => basename($slug),
               'name'              => $info['Name'],
               'gitea_host'        => $info['Gitea Host'],
               'gitea_repo'        => $info['Gitea URI'],
               'description'       => $info['Description'],
            );


            // TODO
            $access_token = '9ebc78834767d2ce0f95ec8a5ab597bc1fbc9ed6';

            $url = $temp['gitea_host'].'api/v1/repos/'.$temp['gitea_repo'].'/raw/master/'.$temp['file'].'?access_token='.$access_token;
            $request = wp_remote_get( $url );

            // WP error or rate limit exceeded
            if ( is_wp_error( $request ) || 200 != wp_remote_retrieve_response_code( $request ) ) {
               break;
            }

            $headers = $this->get_file_headers($request['body'], 'plugin');

            $temp['new_version'] = $headers['Version'];
            $temp['url'] = $temp['gitea_host'].$temp['gitea_repo'];
            $temp['package'] = $temp['gitea_host'].'api/v1/repos/'.$temp['gitea_repo'].'/archive/master.zip?access_token='.$access_token;

            $plugin_data[ $slug ] = $temp;
         }
      }

      return $plugin_data;
   }

   function get_file_headers( $contents, $type ) {

      $gitea_headers = array(
         'GiteaHost' => 'Gitea Host',
         'GiteaUri' => 'Gitea URI',
      );

      $default_plugin_headers = array(
         'Name'        => 'Plugin Name',
         'PluginURI'   => 'Plugin URI',
         'Version'     => 'Version',
         'Description' => 'Description',
         'Author'      => 'Author',
         'AuthorURI'   => 'Author URI',
         'TextDomain'  => 'Text Domain',
         'DomainPath'  => 'Domain Path',
         'Network'     => 'Network',
      );

      $default_theme_headers = array(
         'Name'        => 'Theme Name',
         'ThemeURI'    => 'Theme URI',
         'Description' => 'Description',
         'Author'      => 'Author',
         'AuthorURI'   => 'Author URI',
         'Version'     => 'Version',
         'Template'    => 'Template',
         'Status'      => 'Status',
         'Tags'        => 'Tags',
         'TextDomain'  => 'Text Domain',
         'DomainPath'  => 'Domain Path',
      );

      if ( false !== strpos( $type, 'plugin' ) ) {
         $all_headers = $default_plugin_headers;
      }

      if ( false !== strpos( $type, 'theme' ) ) {
         $all_headers = $default_theme_headers;
      }

      $file_data = str_replace( "\r", "\n", $contents );

      $all_headers = array_merge( $gitea_headers, (array) $all_headers );
      $all_headers = array_unique( $all_headers );

      foreach ( $all_headers as $field => $regex ) {
         if ( preg_match( '/^[ \t\/*#@]*' . preg_quote( $regex, '/' ) . ':(.*)$/mi', $file_data, $match ) && $match[1] ) {
            $all_headers[ $field ] = _cleanup_header_comment( $match[1] );
         } else {
            $all_headers[ $field ] = '';
         }
      }

      $all_headers = array_filter( $all_headers,
         function( $e ) use ( &$all_headers ) {
            return ! empty( $e );
         } );

      return $all_headers;
   }

   function plugins_api( $default = false, $action, $args ) {
      if ( 'plugin_information' == $action ) {
         if ( isset( $this->update_data[ $args->slug ] ) ) {
            $plugin = $this->update_data[ $args->slug ];

            return (object) array(
               'name'          => $plugin['name'],
               'slug'          => $plugin['plugin'],
               'version'       => $plugin['new_version'],
               'requires'      => '4.4',
               'tested'        => get_bloginfo( 'version' ),
               'last_updated'  => date( 'Y-m-d' ),
               'sections' => array(
                  'description' => $plugin['description']
               )
            );
         }
      }

      return $default;
   }


   function set_update_data( $transient ) {
      if ( empty( $transient->checked ) ) {
         return $transient;
      }

      foreach ( $this->update_data as $plugin => $info ) {
         if ( isset( $this->active_plugins[ $plugin ] ) ) {
            $plugin_data = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin );
            $version = $plugin_data['Version'];

            if ( version_compare( $version, $info['new_version'], '<' ) ) {
               $transient->response[ $plugin ] = (object) $info;
            }
         }
      }

      return $transient;
   }


   function upgrader_source_selection( $source, $remote_source, $upgrader, $hook_extra = null ) {
      global $wp_filesystem;

      $plugin = isset( $hook_extra['plugin'] ) ? $hook_extra['plugin'] : false;
      if ( isset( $this->update_data[ $plugin ] ) && $plugin ) {
         $new_source = trailingslashit( $remote_source ) . dirname( $plugin );
         $wp_filesystem->move( $source, $new_source );
         return trailingslashit( $new_source );
      }

      return $source;
   }

   function extra_plugin_headers( $headers ) {
      $headers[] = 'Gitea URI';
      $headers[] = 'Gitea Host';
      return $headers;
   }

}

new Pau_Updater();