<?php
/**
 * user.inc
 *
 * @package   OpenEMR
 * @link      http://www.open-emr.org
 * @author    Brady Miller <brady.g.miller@gmail.com>
 * @copyright Copyright (c) 2010 Brady Miller <brady.g.miller@gmail.com>
 * @license   https://github.com/openemr/openemr/blob/master/LICENSE GNU General Public License 3
 */


// Set effective user - If no user id is provided, then use the currently logged in user
function effectiveUser($user)
{
    return (is_null($user) ? $_SESSION['authUserID'] : $user);
}

/**
 * Return user setting(s) from the 'users' table
 *
 * @param string $label - Setting key
 * @param int $user - user id number from users table
 * @param int $defaultUser - user id to check as alternative/default
 * @return Effective user setting for $label (NULL if does not exist)
 */
function getUserSetting($label, $user = null, $defaultUser = 0)
{

    $user = effectiveUser($user);

  // Collect entry for specified user or 0 (global default user)
    $res = sqlQuery("SELECT setting_value FROM user_settings
      WHERE (setting_user=? OR setting_user=?) AND setting_label=?
      ORDER BY setting_user DESC", array($user, $defaultUser, $label));

  // If no entries exist, then return NULL.
    return (isset($res['setting_value']) ? $res['setting_value'] : null);
}

/**
 * Check if effective user setting matches given value
 *
 * @param string $label - Setting key
 * @param string $value - Setting value
 * @param int $user - user id number from users table
 * @return boolean - true if setting exist and false if does not exist
 */
function checkUserSetting($label, $value, $user = null)
{

    $user = effectiveUser($user);

    $curval = getUserSetting($label, $user);
    if (is_null($curval)) {
        return false;
    } else {
        return ($curval === $value);
    }
}

/**
 * Set a user setting
 *
 * @param string $label - Setting key
 * @param string $value - Setting value
 * @param int $user - user id number from users table
 * @param boolean $createDefault - If no current global default value, create one.
 * @param boolean $overwrite - If this is set to true, then overwrite the current setting
 */
function setUserSetting($label, $value, $user = null, $createDefault = true, $overwrite = true)
{

    $user = effectiveUser($user);

    $cur_value = getUserSetting($label, $user, $user);

  // Check for a custom settings
    if (is_null($cur_value)) {
        sqlStatement("INSERT INTO user_settings(setting_user, setting_label, setting_value) " .
        "VALUES (?,?,?)", array($user, $label, $value));
    } elseif (($cur_value !== $value) && $overwrite) {
        sqlStatement("UPDATE user_settings SET setting_value=? " .
        "WHERE setting_user=? AND setting_label=?", array($value, $user, $label));
    }

  // Call self to create default token
  // (Note this is only done if a default token does not yet exist, thus set overwrite to FALSE))
    if ($createDefault) {
        setUserSetting($label, $value, 0, false, false);
    }
}

//This will remove the selected user setting from the 'user_settings' table.
// $label is used to determine which setting to remove
// $user is the user id number from users table
function removeUserSetting($label, $user = null)
{

    $user = effectiveUser($user);

  // mdsupport - DELETE has implicit select, no need to check and delete
    sqlQuery("DELETE FROM user_settings " .
      "WHERE setting_user=? AND setting_label=?", array($user, $label));
}

function getUserIDInfo($id)
{
    return sqlQuery("SELECT fname, lname, username FROM users where id=?", array($id));
}

/**
 * Function to retain current user's choices from prior sessions
 * @param string $uspfx - Caller specified prefix to be used in settings key, typically script name
 * @param string $postvar - $_POST variable name containing current value
 * @param string $label - Caller specified constant added to $uspfx to create settings key
 * @param string $initval - Initial value to be saved in case user setting does not exist
 * @return Prior setting (if found) or initial value to be used in script
 */
function prevSetting($uspfx, $postvar, $label, $initval)
{

    $setting_key = $uspfx.$label;

    if (isset($_POST[$postvar])) {
        // If script provides current value, store it for future use.
        $pset = $_POST[$postvar];
        if ($pset != getUserSetting($setting_key)) {
            setUserSetting($setting_key, $_POST[$postvar]);
        }
    } else {
        // Script requires prior value
        $pset = getUserSetting($setting_key);
        if (is_null($pset)) {
            setUserSetting($setting_key, $initval);
            $pset = getUserSetting($setting_key);
        }
    }

    return $pset;
}

/**
 * Function to set the state of expandable forms as per user choice, user default or global default
 * @return the current state of the file after updating table user_settings
 */

function collectAndOrganizeExpandSetting($filenames = array())
{
    $current_filename = $filenames[0];
    $global_value = $GLOBALS['expand_form'];

    if (getUserSetting($current_filename) > -1) {
        $current_state = getUserSetting($current_filename);
    } elseif ($global_value) {
        $current_state = $global_value;
    } else {
        $current_state = 0;
    }

    if (count($filenames)) {
        foreach ($filenames as $filename) {
            setUserSetting($filename, $current_state);
        }
    }

     return $current_state;
}