<?php

class HistoryCodes extends Base {

    // Variables.

    private $current_user_serial = 0;
    private $current_user_id = "";
    private $current_user_name = "";
    private $current_user_email = "";
    private $pagination_size = 20;
    private $pagination_page = 1;

    // =================
    // Class Constructor
    // =================

    public function __construct() {

        set_error_handler(array($this, "displayError"));

        date_default_timezone_set(self::TIMEZONE);

        $this->current_user_serial = $_SESSION[self::USER_SERIAL] ?? 0;
        $this->current_user_id = $_SESSION[self::USER_ID] ?? "";
        $this->current_user_name = $_SESSION[self::USER_NAME] ?? "";
        $this->current_user_email = $_SESSION[self::USER_EMAIL] ?? "";

        $this->pagination_page = $_SESSION[self::PAGINATION_PAGE] ?? 1;
    }

    // ===================
    // Setup History Codes
    // ===================

    public function setupHistoryCodes() {

        $historycodes = $this->getHistoryCodesPage();
        $popovers = (new Popovers())->getPopovers();

        $XML = $this->mergeXML($historycodes, "<XML/>");
        $XML = $this->mergeXML($popovers, $XML);

        $content = $this->applyXSL($XML, $this->getXSL("setupHistoryCodes"));

        $this->displayContent($content);
    }

    // ================
    // Add History Code
    // ================

    public function addHistoryCode() {

        $step = filter_input(INPUT_POST, "step") ?: "prompt";

        switch ($step) {

            case "prompt":

                $content = $this->applyXSL("", $this->getXSL("addHistoryCode"));

                $this->displayContent($content);

                break;

            case "add":

                $historycode_code = filter_input(INPUT_POST, "historycode_code") ?: "";
                $historycode_description = filter_input(INPUT_POST, "historycode_description") ?: "";

                $SQL = "insert into historycodes
          
                         (  historycode_code,
                            historycode_description,
                            historycode_active,
                            historycode_creator,
                            historycode_created )
                               
                  VALUES ( :historycode_code,
                           :historycode_description,
                           :historycode_active,
                           :historycode_creator,
                           :historycode_created )";

                $statement = $this->connect()->prepare($SQL);

                $statement->bindValue(":historycode_code", strtoupper($historycode_code));
                $statement->bindValue(":historycode_description", $historycode_description);
                $statement->bindValue(":historycode_active", true, PDO::PARAM_BOOL);
                $statement->bindValue(":historycode_creator", $this->current_user_name);
                $statement->bindValue(":historycode_created", $this->getTimestamp());

                $statement->execute();

                break;

            default:

                $this->displayHome();
        }
    }

    // ===================
    // Edit a History Code
    // ===================

    public function editHistoryCode() {

        $step = filter_input(INPUT_POST, "step") ?: "prompt";

        switch ($step) {

            case "prompt":

                $historycode_serial = filter_input(INPUT_POST, "historycode_serial", FILTER_SANITIZE_NUMBER_INT) ?: 0;

                $historycode = $this->getHistoryCode($historycode_serial);

                if ($historycode->count() == 0) {
                    $this->logError("Invalid History Code ({$historycode_serial}). " . __METHOD__);
                }

                $content = $this->applyXSL($historycode, $this->getXSL("editHistoryCode"));

                $this->displayContent($content);

                break;

            case "update":

                $historycode_serial = filter_input(INPUT_POST, "historycode_serial", FILTER_SANITIZE_NUMBER_INT) ?: 0;
                $historycode_code = filter_input(INPUT_POST, "historycode_code") ?: "";
                $historycode_description = filter_input(INPUT_POST, "historycode_description") ?: "";
                $historycode_active = filter_input(INPUT_POST, "historycode_active", FILTER_VALIDATE_BOOLEAN) ?: false;

                // Verify the HistoryCodes

                $historycode = $this->getHistoryCode($historycode_serial);

                if ($historycode->count() == 0) {
                    $this->logError("Invalid HistoryCodes ({$historycode_serial}). " . __METHOD__);
                }

                $SQL = "update historycodes 
                           set historycode_code        = :historycode_code,
                               historycode_description = :historycode_description,
                               historycode_active      = :historycode_active,
                               historycode_changer     = :historycode_changer,
                               historycode_changed     = :historycode_changed
                         where historycode_serial      = :historycode_serial";

                $statement = $this->connect()->prepare($SQL);

                $statement->bindValue(":historycode_serial", $historycode_serial);
                $statement->bindValue(":historycode_code", strtoupper($historycode_code));
                $statement->bindValue(":historycode_description", $historycode_description);
                $statement->bindValue(":historycode_active", $historycode_active, PDO::PARAM_BOOL);
                $statement->bindValue(":historycode_changer", $this->current_user_name);
                $statement->bindValue(":historycode_changed", $this->getTimestamp());

                $statement->execute();

                break;

            default:

                $this->displayHome();
        }
    }

    // ===================
    // Delete History Code
    // ===================

    public function deleteHistoryCode() {

        $historycode_serial = filter_input(INPUT_POST, "historycode_serial", FILTER_SANITIZE_NUMBER_INT) ?: 0;

        $historycode = $this->getHistoryCode($historycode_serial);

        if ($historycode->count() == 0) {
            $this->logError("Invalid History Code ({$historycode_serial}). " . __METHOD__);
        }

        $SQL = "delete from historycodes where historycode_serial = {$historycode_serial}";

        $this->executeSQL($SQL);
    }

    // =====================================
    // Return an Active History Codes Object
    // =====================================

    public function getActiveHistoryCodes() {

        $SQL = "select view_historycodes.*
                  from view_historycodes
                 where historycode_active is true";

        return $this->getTable("historycodes", $SQL);
    }

    // ==============================
    // Return an History Codes Object
    // ==============================

    public function getHistoryCode($historycode_serial = 0) {

        $SQL = "select view_historycodes.*
                  from view_historycodes
                 where historycode_serial = {$historycode_serial}";

        return $this->getTable("historycodes", $SQL);
    }

    // =============================
    // Return a History Codes Object
    // =============================

    public function getHistoryCodes() {

        $SQL = "select view_historycodes.* 
                  from view_historycodes";

        return $this->getTable("historycodes", $SQL);
    }

    // ==================================
    // Return a History Codes Page Object
    // ==================================

    public function getHistoryCodesPage() {

        // Find Criteria

        $find_historycode = filter_input(INPUT_POST, "find_historycode") ?: "";
        $find_historycode = $this->sanitizeString($find_historycode);

        $find_words = implode("|", explode(" ", $find_historycode));

        // Record Count

        $connection = $this->connect();

        $SQL = "select count(*) as count
                  from view_historycodes
                 where historycode_code        regexp :historycode_code
                    or historycode_description regexp :historycode_description";

        $statement = $connection->prepare($SQL);

        $statement->bindValue(":historycode_code", $find_words);
        $statement->bindValue(":historycode_description", $find_words);

        $statement->execute();

        $recordset = $statement->fetch(PDO::FETCH_ASSOC);

        $count = (count($recordset) > 0) ? (integer) $recordset["count"] : (integer) 0;

        // Pagination

        $pagination = filter_input(INPUT_POST, "pagination") ?: "";

        switch ($pagination) {

            case "first" : $this->pagination_page = 1;
                break;
            case "previous" : $this->pagination_page = max(($this->pagination_page - 1), 1);
                break;
            case "next" : $this->pagination_page = ($this->pagination_page + 1);
                break;
            case "last" : $this->pagination_page = ($count / $this->pagination_size);
                break;
        }

        $offset = (($this->pagination_page * $this->pagination_size) - $this->pagination_size);
        $start = ($offset + 1);
        $end = min($count, (($start + $this->pagination_size) - 1));

        // Data

        $SQL = "select view_historycodes.*
                  from view_historycodes
                 where historycode_code        regexp :historycode_code
                    or historycode_description regexp :historycode_description
              order by historycode_code
                 limit {$this->pagination_size}
                offset {$offset}";

        $statement = $connection->prepare($SQL);

        $statement->bindValue(":historycode_code", $find_words);
        $statement->bindValue(":historycode_description", $find_words);

        $statement->execute();

        $historycodes = $this->getTableXML("historycodes", $statement);

        // Insert Pagination Attributes

        $historycodes->addAttribute("count", $count);
        $historycodes->addAttribute("start", $start);
        $historycodes->addAttribute("end", $end);
        $historycodes->addAttribute("page", $this->pagination_page);

        $_SESSION[self::PAGINATION_PAGE] = $this->pagination_page;

        return $historycodes;
    }
}

?>