CF7 Abandoned Entries PHP

<?php
/*
 * Export CSV FIle Using Ajax
 */
if( ! defined( 'ABSPATH' ) ) exit;

if( ! class_exists('esb_cf7_custom_ajax') ) {

    class esb_cf7_custom_ajax {

        function esb_cf7_export_csv_form(){
            //For Export CSV File
            add_action( 'wp_ajax_esb_cf7_csv' , array( $this , 'fun_esb_cf7_csv' ) );
            add_action( 'wp_ajax_nopriv_esb_cf7_csv' , array( $this , 'fun_esb_cf7_csv' ) );
            //For Abandoned Entry
            add_action( 'wp_ajax_esb_cf7_abandoned_entry' , array( $this , 'fun_esb_cf7_abandoned_entry' ) );
            add_action( 'wp_ajax_nopriv_esb_cf7_abandoned_entry' , array( $this , 'fun_esb_cf7_abandoned_entry' ) );
            //For Add Note & delete Note
            add_action( 'wp_ajax_esb_cf7_add_delete_note' , array( $this , 'fun_esb_cf7_add_delete_note' ) );
            add_action( 'wp_ajax_nopriv_esb_cf7_add_delete_note' , array( $this , 'fun_esb_cf7_add_delete_note' ) );
        }

        /*
         * Ajax For Add Note $ delete Note
         */
        function fun_esb_cf7_add_delete_note(){
            if( !empty( $_POST ) ){
                $post_id    = $_POST['post_id'];
                $post_note  = $_POST['post_note'];
                $action     = $_POST['do_action'];
                $key_id     = $_POST['key_id'];
            }
            if( $action == "add-note" ){
                $current_time       = current_time( 'mysql' );
                $current_user_id    = get_current_user_id();
                $old_count = get_post_meta( $post_id , 'esb_cf7_note_count', true);
                $count = $old_count + 1;
                update_post_meta( $post_id , 'esb_cf7_note_count', $count );
                add_post_meta( $post_id , 'esb_cf7_note_'.$count , $post_note );
                add_post_meta( $post_id , 'esb_cf7_note_time_'.$count , $current_time );
                add_post_meta( $post_id , 'esb_cf7_note_user_'.$count , $current_user_id );
            }
            if( $action == "remove-note" ){
                delete_post_meta( $post_id, 'esb_cf7_note_'.$key_id );
                delete_post_meta( $post_id, 'esb_cf7_note_time_'.$key_id );
                delete_post_meta( $post_id, 'esb_cf7_note_user_'.$key_id );
            }
            ?>
            <div class="esb-note-display">
                <?php
                    $count = get_post_meta($post_id,'esb_cf7_note_count',true);
                    for($i = $count ; $i >= 1 ; $i-- ){
                        $data_note = get_post_meta( $post_id , 'esb_cf7_note_'.$i , true );
                        $data_time = get_post_meta( $post_id , 'esb_cf7_note_time_'.$i , true );
                        $data_user = get_post_meta( $post_id , 'esb_cf7_note_user_'.$i , true );
                        $user_name = get_userdata($data_user);
                        $user_name = !empty( $user_name ) ? $user_name->data->display_name : $data_user;
                        if( !empty( $data_note ) && !empty( $data_time ) && !empty( $data_user ) ){
                        ?>
                        <div class="esb-cf7-single-note">
                            <p> added by
                                <a href="<?php echo admin_url().'user-edit.php?user_id='.$data_user; ?>" target="_blank">
                                    <?php echo $user_name; ?>
                                </a> on <?php echo $data_time; ?>
                                |
                                <a class="esb-cf7-remove-meta" data-id="<?php echo $i;?>">Delete</a>
                            </p>
                            <p> <?php echo $data_note; ?> </p>
                        </div>
                    <?php } } ?>
            </div>
            <?php
            exit();
        }
        /*
         * Ajax For Abandoned Entry
         */
        function fun_esb_cf7_abandoned_entry(){

            if( !empty( $_POST ) ){
                $title_field_name   = $_POST['title_field_name'];
                $form_id            = $_POST['form_id'];
                $form_data          = json_decode( stripslashes( $_POST['form_value'] ) );
            }
            if( isset( $form_id ) && !empty( $form_id )){
                $prevent_duplicate_val = get_post_meta( $form_id , 'esb_form_prevente_duplicate' , true );
            }

            if( !empty( $prevent_duplicate_val ) ){
                if( $prevent_duplicate_val == 'yes' ){
                    if( isset( $_SESSION['uniq_id'] ) ){
                        $uniq_id = $_SESSION['uniq_id'];
                        $query = new WP_Query(array(
                                                    'post_type'     =>'esb_cf7_entries',
                                                    'posts_per_page'=> -1,
                                                    'meta_query'    => array ( array (
                                                                          'key' => 'entry_uniq_key',
                                                                          'value' => $uniq_id,
                                                                          'compare' => 'IN'
                                                                        ) )
                                                    ));
                        while($query->have_posts()){
                            $query->the_post();
                            $post_id = get_the_ID();
                        }
                        if( !empty( $post_id ) ){
                            $entry_id = $post_id;
                        }
                    }
                    else{
                        $uniq_id = uniqid();
                        $_SESSION['uniq_id'] = $uniq_id;
                        $entry_id = wp_insert_post( array(
                                                'post_type'     => ESB_CF7_ENTRIES_POST_TYPE,
                                                'post_status'   => 'publish',
                                                ));
                        update_post_meta( $entry_id , 'esb_cf7_note_count', 0);
                    }
                }
                if( $prevent_duplicate_val == 'no' ){
                    $entry_id = wp_insert_post( array(
                                                'post_type'     => ESB_CF7_ENTRIES_POST_TYPE,
                                                'post_status'   => 'publish',
                                                ));
                    update_post_meta( $entry_id , 'esb_cf7_note_count', 0);
                }
            }

            $form_fix_key_tmp   = array( '_wpcf7' , '_wpcf7_version' , '_wpcf7_locale' , '_wpcf7_unit_tag' , '_wpcf7_container_post' );
            $form_fix_key       = apply_filters('esb_cf7_add_form_fix_key', $form_fix_key_tmp , $current_form_id );


            if( !empty( $form_data ) && !empty( $entry_id )){

                update_post_meta( $entry_id, 'entry_uniq_key' , $uniq_id );

                $all_key = array();

                foreach ( $form_data as $form_data_key => $form_data_value ) {
                    if( $form_data_value->name == $title_field_name ){
                        update_post_meta( $entry_id, 'esb_post_title', $form_data_value->value );
                        wp_update_post( array(
                                        'ID'           => $entry_id,
                                        'post_title'   => $form_data_value->value
                                        ));
                    }
                    /*
                     * check First 5 field of cf7 fix key
                     */
                    if( in_array( $form_data_value->name, $form_fix_key ) ){
                        update_post_meta( $entry_id, 'esb_' . $form_data_value->name, $form_data_value->value );
                    }else{
                        if(in_array($form_data_value->name, $all_key) ){
                            $old_data = get_post_meta( $entry_id , 'esb_form_field_' . $form_data_value->name , true);
                            $new_data = $old_data .' , '.$form_data_value->value;
                            update_post_meta( $entry_id, 'esb_form_field_' . $form_data_value->name, $new_data );
                        }
                        else{
                            update_post_meta( $entry_id, 'esb_form_field_' . $form_data_value->name, $form_data_value->value );
                            array_push($all_key, $form_data_value->name);
                        }
                    }
                }
            }
            $extra_meta = array(
                        'date_time'         => current_time( 'd/m/Y h:i A' ),
                        'http_user_agent'   => sanitize_text_field( $_SERVER['HTTP_USER_AGENT'] ),
                        'remote_addr'       => sanitize_text_field( $_SERVER['REMOTE_ADDR'] ),
                        'http_referer'      => sanitize_text_field( $_SERVER['HTTP_REFERER'] ),
                        );
            if( !empty( $extra_meta ) && !empty( $entry_id )){
                foreach ( $extra_meta as $key => $value ){
                        update_post_meta( $entry_id, 'esb_extra_' . $key, $value );
                }
            }
            update_post_meta( $entry_id, 'esb_form_status' , 'Abandoned' );
            update_post_meta( $entry_id, 'esb_abandoned_flag' , 'false' );

            exit();
        }

        /*
         * Ajax For Export CSV file
         */
        function fun_esb_cf7_csv(){
            $selected_form      = $_POST['selected_val'];
            $esb_entries_arg    = array(
                                    'post_type'         => ESB_CF7_ENTRIES_POST_TYPE,
                                    'post_status'       => 'publish',
                                    'posts_per_page'    => -1,
                                );
            $esb_cf7_all_entries = get_posts( $esb_entries_arg );
            if ( $esb_cf7_all_entries ) {
                $file = fopen('php://output', 'w');
                foreach ($esb_cf7_all_entries as $form_key => $form_value) {
                    $form_id = get_post_meta( $form_value->ID , 'esb__wpcf7' , true );
                    if( $selected_form == $form_id ) {
                        $all_key    = array();
                        $esb_form   = esb_get_all_entries ( $form_value->ID );
                        foreach ($esb_form as $esb_key => $esb_value) {
                            array_push($all_key, $esb_key);
                        }
                        break;
                    }
                }
                fputcsv($file, $all_key);
                foreach ($esb_cf7_all_entries as $form_key => $form_value) {
                    $all_value  = array();
                    $form_id = get_post_meta( $form_value->ID , 'esb__wpcf7' , true );
                    if( $selected_form == $form_id ) {
                        $esb_form   = esb_get_all_entries ( $form_value->ID );
                        foreach ($esb_form as $esb_key => $esb_value) {
                            array_push($all_value, $esb_value);
                        }
                    fputcsv($file, $all_value);
                    }
                }
            }
            exit();
        }
    }//End Of Class
}// class_exists check
?>