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resource_download_allowed()

Description

For the given resource and size, can the current user download it?
resource type and access may already be available in the case of search, so pass them along to get_resource_access to avoid extra queries
$resource can be a resource-specific search result array.

Parameters

ColumnTypeDefaultDescription
$resource int ID of resource
$size string ID of size
$resource_type int ID of resource type
$alternative int -1 Use alternative?

Return

boolean

Location

include/resource_functions.php lines 5657 to 5728

Definition

 
function resource_download_allowed($resource,$size,$resource_type,$alternative=-1)
    {
    global $userref, $usergroup, $user_dl_limit, $user_dl_days, $noattach, $sizes_always_allowed;

    $access=get_resource_access($resource);

    if(resource_has_access_denied_by_RT_size($resource_type, $size))
        {
        return false;
        }

    if (checkperm('X' . $resource_type . "_" . $size) && $alternative == -1) {
        # Block access to this resource type / size? Not if an alternative file
        # Only if no specific user access override (i.e. they have successfully requested this size).
        $usercustomaccess = get_custom_access_user($resource, $userref);
        $usergroupcustomaccess = get_custom_access($resource, $usergroup);
        if (
            ($usercustomaccess === false || $usercustomaccess !== 0) && 
            ($usergroupcustomaccess === false || $usergroupcustomaccess !== 0)
        ) {
            return false;
        }
    }

    if(($size == "" || $size == "hpr" || getval("noattach","") == "")  && intval($user_dl_limit) > 0)
        {
        $download_limit_check = get_user_downloads($userref,$user_dl_days);
        if($download_limit_check >= $user_dl_limit)
            {
            return false;
            }
        }

    # Full access
    if ($access==0)
        {
        return true;
        }

    # Restricted
    if(1 == $access)
        {
        // The system should always allow these sizes to be downloaded as these are needed for search results and it makes
        // sense to allow them if a request for one of them is received. For example when $hide_real_filepath is enabled.
        // 'videojs' represents the preview loaded by videojs viewer.

        if('' == $size)
            {
            # Original file - access depends on the 'restricted_full_download' config setting.
            global $restricted_full_download;
            return $restricted_full_download;
            }
        elseif('' != $size && in_array($size, $sizes_always_allowed))
            {
            return true;
            }
        else
            {
            # Return the restricted access setting for this resource type.
            return ps_value("SELECT allow_restricted value FROM preview_size WHERE id = ?", array("s", $size), 0, "schema") == 1;
            }
        }

    # Confidential
    if ($access==2)
        {
        return false;
        }

    # Unable to determine access
    return false;
    }

This article was last updated 4th December 2024 08:35 Europe/London time based on the source file dated 28th November 2024 12:10 Europe/London time.