<?php
/*
class-scc-common-data-export.php

Description: This class is a data export engine whitch exports cached data using wp-cron at regular intervals
Author: Daisuke Maruyama
Author URI: http://marubon.info/
License: GPL2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.txt
*/

/*
Copyright (C) 2014 - 2018 Daisuke Maruyama

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

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 Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

class SCC_Common_Data_Export_Engine extends SCC_Export_Engine {

	/**
	 * Meta key for share second cache
	 */
	const DEF_SHARE_META_KEY_PREFIX = 'scc_share_count_';

	/**
	 * Meta key for follow second cache
	 */
	const DEF_FOLLOW_META_KEY_PREFIX = 'scc_follow_count_';

	/**
	 * Cron name to schedule cache processing
	 */
	const DEF_PRIME_CRON = 'scc_common_dataexport_prime';

	/**
	 * Cron name to execute cache processing
	 */
	const DEF_EXECUTE_CRON = 'scc_common_dataexport_exec';

	/**
	 * Schedule name for cache processing
	 */
	const DEF_EVENT_SCHEDULE = 'common_data_export_event';

  	/**
	 * Schedule description for cache processing
	 */
	const DEF_EVENT_DESCRIPTION = '[SCC] Common Data Export Interval';

	/**
	 * Option flag of data export
	 */
	private $export_activation = 0;

	/**
	 * Interval for data export
	 */
	private $export_interval = 43200;

	/**
	 * Schedule for data export
	 */
	private $export_schedule = '0 0 * * *';

	/**
	 * Excluded keys of data export
	 */
	private $export_exclude_keys = array();

	/**
	 * File name of data export
	 */
	private $export_file_name = 'sns-count-cache-data.csv';

	/**
	 * Cache post types
	 */
	private $post_types = array( 'post', 'page' );

	/**
	 * Cache target of share count
	 */
	private $share_target_sns = array();

	/**
	 * Cache target of follow count
	 */
	private $follow_target_sns = array();

	/**
	 * Initialization
	 *
	 * @since 0.1.1
	 */
	public function initialize( $options = array() ) {
		SCC_Logger::log( '[' . __METHOD__ . '] (line='. __LINE__ . ')' );

		$this->share_cache_key_prefix = self::DEF_SHARE_META_KEY_PREFIX;
		$this->follow_cache_key_prefix = self::DEF_FOLLOW_META_KEY_PREFIX;
		$this->prime_cron = self::DEF_PRIME_CRON;
		$this->execute_cron = self::DEF_EXECUTE_CRON;
		$this->event_schedule = self::DEF_EVENT_SCHEDULE;
		$this->event_description = self::DEF_EVENT_DESCRIPTION;

		if ( isset( $options['export_activation'] ) ) $this->export_activation = $options['export_activation'];
		if ( isset( $options['export_interval'] ) ) $this->export_interval = $options['export_interval'];
		if ( isset( $options['export_schedule'] ) ) $this->export_schedule = $options['export_schedule'];
		if ( isset( $options['prime_cron'] ) ) $this->prime_cron = $options['prime_cron'];
		if ( isset( $options['execute_cron'] ) ) $this->execute_cron = $options['execute_cron'];
		if ( isset( $options['event_schedule'] ) ) $this->event_schedule = $options['event_schedule'];
		if ( isset( $options['event_description'] ) ) $this->event_description = $options['event_description'];
		if ( isset( $options['export_exclude_keys'] ) ) $this->export_exclude_keys = $options['export_exclude_keys'];
		if ( isset( $options['export_file_name'] ) ) $this->export_file_name = $options['export_file_name'];
		if ( isset( $options['post_types'] ) ) $this->post_types = $options['post_types'];
		if ( isset( $options['share_cache_key_prefix'] ) ) $this->share_cache_key_prefix = $options['share_cache_key_prefix'];
		if ( isset( $options['follow_cache_key_prefix'] ) ) $this->follow_cache_key_prefix = $options['follow_cache_key_prefix'];
		if ( isset( $options['share_target_sns'] ) ) $this->share_target_sns = $options['share_target_sns'];
		if ( isset( $options['follow_target_sns'] ) ) $this->follow_target_sns = $options['follow_target_sns'];

		add_filter( 'cron_schedules', array( $this, 'schedule_export_interval' ) );
		add_action( $this->prime_cron, array( $this, 'prime_export' ) );
		add_action( $this->execute_cron, array( $this, 'execute_export' ), 10, 1 );
	}

	/**
	 * Register event schedule for this engine
	 *
	 * @since 0.1.0
	 */
	public function schedule_export_interval( $schedules ) {
		SCC_Logger::log( '[' . __METHOD__ . '] (line='. __LINE__ . ')' );

		$schedules[$this->event_schedule] = array(
			'interval' => $this->export_interval,
			'display' => $this->event_description
			);

			return $schedules;
	}

	/**
	 * Prime data export
	 *
	 * @since 0.4.0
	 */
	public function prime_export() {
		SCC_Logger::log( '[' . __METHOD__ . '] (line='. __LINE__ . ')' );

		//$next_exec_time = time() + $this->export_interval;

		//$next_exec_time = time() + 5;

		$next_exec_time = SCC_WP_Cron::next_exec_time( $this->export_schedule );

		SCC_Logger::log( '[' . __METHOD__ . '] check_interval: ' . $this->export_interval );

		SCC_Logger::log( '[' . __METHOD__ . '] next_exec_time (timesatamp): ' . $next_exec_time );
		SCC_Logger::log( '[' . __METHOD__ . '] next_exec_time (date): ' . date_i18n( 'Y/m/d H:i:s', $next_exec_time ) );

		if ( ! SCC_WP_Cron::is_scheduled_hook( $this->execute_cron ) ) {
			wp_schedule_single_event( $next_exec_time, $this->execute_cron, array( SCC_Hash::short_hash( $next_exec_time ) ) );
		}

		//wp_schedule_single_event( $next_exec_time, $this->execute_cron, array( SCC_Hash::short_hash( $next_exec_time ) ) );
	}


	/**
	 * Execute data export
	 *
	 * @since 0.4.0
	 */
	public function execute_export( $hash ) {
		SCC_Logger::log( '[' . __METHOD__ . '] (line='. __LINE__ . ')' );

		$base_dir = WP_PLUGIN_DIR . '/sns-count-cache/data/';

		$current_date = date_i18n( 'Y/m/d H:i:s' );

		if ( file_exists( $base_dir ) ) {
			$abs_path = $base_dir . $this->export_file_name;

			if ( ! file_exists( $abs_path ) ) {
				if ( touch( $abs_path ) ) {
					SCC_Logger::log( '[' . __METHOD__ . '] export file creation succeeded: ' . $abs_path );
				} else {
					SCC_Logger::log( '[' . __METHOD__ . '] export file creation failed: ' . $abs_path );
				}
				if ( file_exists( $abs_path ) ) {
					SCC_Logger::log( '[' . __METHOD__ . '] file exists: ' . $abs_path );
					$fp = fopen( $abs_path, 'a' );

					$header = '"Retrieval Date","Post ID","Post Type","Post Title","Permalink","Post Date","SNS","Data Type","Data Value",' . "\r\n";

					if ( fwrite( $fp, mb_convert_encoding( $header, "SJIS", "UTF-8" ) ) ) {
						SCC_Logger::log( '[' . __METHOD__ . '] file write succeeded: ' . $header );
					} else {
						SCC_Logger::log( '[' . __METHOD__ . '] file wrote failed: ' . $header );
					}
					if ( fclose( $fp ) ) {
						SCC_Logger::log( '[' . __METHOD__ . '] file close succeeded: ' . $abs_path );
					} else {
						SCC_Logger::log( '[' . __METHOD__ . '] file close failed: ' . $abs_path );
					}
				}
			}

			if ( file_exists( $abs_path ) ) {
				SCC_Logger::log( '[' . __METHOD__ . '] file exists: ' . $abs_path );

				$fp = fopen( $abs_path, 'a' );

				$content = '"' . $current_date . '","' . 'home' . '","' . '-' . '","' . get_bloginfo('name') . '","' . home_url( '/' ) . '","' . '-';

				$option_key = $this->share_cache_key_prefix . strtolower( 'home' );

				if ( false !== ( $sns_counts = get_option( $option_key ) ) ) {

					foreach ( $this->share_target_sns as $sns => $active ) {
						if ( ! in_array( $sns, $this->export_exclude_keys ) ) {
							if ( $active ){
								if ( $sns_counts[$sns] >= 0 ) {
									$data_value = $sns_counts[$sns];
								} else {
									$data_value = '';
								}
								$data = $content . '","' . $sns . '","' . 'Share' . '","' . $data_value . '",' . "\r\n";

								if ( fwrite( $fp, mb_convert_encoding( $data, "SJIS", "UTF-8" ) ) ) {
									SCC_Logger::log( '[' . __METHOD__ . '] file write succeeded: ' . $data );
								} else {
									SCC_Logger::log( '[' . __METHOD__ . '] file wrote failed: ' . $data );
								}
							}
						}
					}
				}

				$query_args = array(
					'post_type' => $this->post_types,
					'post_status' => 'publish',
					'nopaging' => true,
					'update_post_term_cache' => false,
					'update_post_meta_cache' => false
				);

				$posts_query = new WP_Query( $query_args );

				if ( $posts_query->have_posts() ) {
					while ( $posts_query->have_posts() ) {
						$posts_query->the_post();

						$post_ID = get_the_ID();

						$content = '"' . $current_date . '","' . $post_ID . '","' . get_post_type( $post_ID ) . '","' . get_the_title( $post_ID ) . '","' . get_permalink( $post_ID ) . '","' . get_post_time( 'Y/m/d H:i', false, $post_ID );

						foreach ( $this->share_target_sns as $sns => $active ) {
							if ( ! in_array( $sns, $this->export_exclude_keys ) ) {
								$meta_key = $this->share_cache_key_prefix . strtolower( $sns );

								if ( $active ) {
									$data_value = get_post_meta( $post_ID, $meta_key, true );

									if ( SCC_Cache::has_value( $data_value ) && $data_value < 0 ){
										$data_value = '';
									}

									$data = $content . '","' . $sns . '","' . 'Share' . '","' . $data_value . '",' . "\r\n";

									if ( fwrite( $fp, mb_convert_encoding( $data, "SJIS", "UTF-8" ) ) ) {
										SCC_Logger::log( '[' . __METHOD__ . '] file write succeeded: ' . $data );
									} else {
										SCC_Logger::log( '[' . __METHOD__ . '] file wrote failed: ' . $data );
									}
								}
							}
						}

					  /*
					foreach ( $this->follow_target_sns as $key => $value ) {
					$meta_key = $this->follow_cache_key_prefix . strtolower( $key );
					if ( $value ) {
						$data_value = get_post_meta( $post_ID, $meta_key, true );

						if ( $data_value == -1 ){
							$data_value = '';
						}

						$data = $content . '","' . $key . '","' . 'Follow' . '","' . $data_value . '",' . "\r\n";
					}
					if ( fwrite( $fp, mb_convert_encoding( $data, "SJIS", "UTF-8" ) ) ) {
						SCC_Logger::log( '[' . __METHOD__ . '] file write succeeded: ' . $data );
					} else {
						SCC_Logger::log( '[' . __METHOD__ . '] file wrote failed: ' . $data );
					}
				}
						*/

					}
				}
				wp_reset_postdata();

				if ( fclose( $fp ) ) {
					SCC_Logger::log( '[' . __METHOD__ . '] file close succeeded: ' . $abs_path );
				} else {
					SCC_Logger::log( '[' . __METHOD__ . '] file close failed: ' . $abs_path );
				}
			}
		}
	}

	/**
	 * Reset exported file
	 *
	 * @since 0.4.0
	 */
	public function reset_export() {
		SCC_Logger::log( '[' . __METHOD__ . '] (line='. __LINE__ . ')' );

		$base_dir = WP_PLUGIN_DIR . '/sns-count-cache/data/';
		$abs_path = $base_dir . $this->export_file_name;

		if ( file_exists( $abs_path ) ) {
			unlink( $abs_path );
		}
	}
}

?>
