resourcespace/pages/log_entry.php

<?php
include "../include/boot.php";
include "../include/authenticate.php";

$logref = getval("ref", "", true);
$k = getval("k", "");
$modal = (getval("modal", "") == "true");
$log_entry = get_resource_log(null, 1, array("r.ref" => $logref))['data'];

if (!is_array($log_entry) || count($log_entry) == 0) {
    exit($lang['error_invalid_input']);
}

$log_entry = $log_entry[0];
$searchparams = get_search_params();

// Logs can sometimes contain confidential information and the user looking at them must have admin permissions set.
// Some log records can be viewed by all users. Ensure access control by allowing only white listed log codes to bypass
// permissions checks.
$safe_log_codes = array(LOG_CODE_DOWNLOADED);
$resource_access = get_resource_access($log_entry["resource"]);
$bypass_permission_check = in_array($log_entry["type"], $safe_log_codes) && in_array($resource_access, array(0, 1));

if (!checkperm('v') && !$bypass_permission_check) {
    die($lang['log-adminpermissionsrequired']);
}
?>

<div class="RecordBox">
    <div class="RecordPanel">
        <div class="RecordHeader">
            <p>
                <a href="<?php echo generateURL($baseurl_short . "pages/log.php", $searchparams, array("ref" => $log_entry["resource"]));?>"  onclick="return ModalLoad(this,true);">
                    <?php echo LINK_CARET_BACK . escape($lang["back"]); ?>
                </a>
            </p>
            <div class="backtoresults"> 
                <a href="#" onclick="ModalClose();" class="closeLink fa fa-times" title="<?php echo escape($lang["close"]); ?>"></a>
            </div>
            <h1><?php echo escape($lang["log-reference"] . " " . $log_entry["ref"]); ?></h1>
        </div>       
    </div>

    <div class="BasicsBox">
        <div class="Listview">
            <table class="ListviewStyle">
                <tr class="ListviewTitleStyle">
                    <th><?php echo escape($lang["log_column"]); ?></th>
                    <th><?php echo escape($lang["log_value"]); ?></th>
                </tr>
                <?php
                foreach ($log_entry as $column => $value) {
                    $cleanval = true;

                    if (!hook("log_entry_processing", "", array($column, $value, $log_entry))) {
                        switch ($column) {
                            case "type":
                                $name = $lang["type"];

                                if (isset($lang["log-" . $value])) {
                                    $value = $lang["log-" . $value];
                                } elseif (isset($lang["log_code_" . $value])) {
                                    $value = $lang["log_code_" . $value];
                                }
                                break;

                            case "date":
                                $name = $lang["date"];
                                $value = nicedate($log_entry["date"], true, true, true);
                                break;

                            case "username":
                                $name = $lang["username"];

                                if ($log_entry["access_key"] != "") {
                                    $value = $lang["externalusersharing"];
                                }

                                if (trim((string) $value) === "") {
                                    $value = $lang["system_user_default"];
                                }
                                break;

                            case "fullname":
                                $name = $lang["fullname"];

                                if ($log_entry["access_key"] != "") {
                                    // Already shown as username
                                    continue 2;
                                }

                                if (trim((string) $value) === "") {
                                    $value = $lang["system_user_default"];
                                }
                                break;

                            case "resource_type_field":
                                if (in_array($log_entry["type"], array(LOG_CODE_DOWNLOADED))) {
                                    // Not relevant
                                    continue 2;
                                }

                                $name = $lang["admin_resource_type_field"];

                                if (isset($log_entry["title"])) {
                                    $value = $log_entry["title"];
                                }
                                break;

                            case "usageoption":
                                if ($value == -1) {
                                    // Not relevant
                                    continue 2;
                                } else {
                                    $name = $lang["indicateusagemedium"];
                                    if (isset($download_usage_options[$value])) {
                                        $value = i18n_get_translated($download_usage_options[$value]);
                                    }
                                }
                                break;

                            case "diff":
                                if (in_array($log_entry["type"], array(LOG_CODE_DOWNLOADED))) {
                                    // Not relevant, skip
                                    continue 2;
                                }

                                $name = $lang["difference"];
                                $difftext = $value;

                                if (
                                    $log_entry["resource_type_field"] != ""
                                    && in_array($log_entry["resource_type_field"], $FIXED_LIST_FIELD_TYPES)
                                ) {
                                    $transdifflines = array();
                                    $difflines = explode("\n", $value);

                                    foreach ($difflines as $diffline) {
                                        $action = substr($diffline, 0, 1);

                                        if ($log_entry["resource_type_field"] == FIELD_TYPE_CATEGORY_TREE) { // If tree
                                            $nodestrings = explode("/", substr($diffline, 2));
                                            $difftext = [];
                                            foreach ($nodestrings as $nodestring) {
                                                $difftext[] = i18n_get_translated($nodestring);
                                            }
                                            $transdifflines[] = $action . " " . implode("/", $difftext);
                                        } else {
                                            $transdifflines[] = $action . " " . i18n_get_translated(substr($diffline, 2));
                                        }
                                    }
                                    $difftext = implode("\n", $transdifflines);
                                }
                                $value = nl2br(format_string_more_link(escape(wordwrap($difftext, 75, "\n", true))));
                                $cleanval = false;
                                break;

                            case "size":
                                $name = $lang["size"];

                                if (!in_array($log_entry["type"], array(LOG_CODE_DOWNLOADED))) {
                                    // Not relevant
                                    continue 2;
                                } else {
                                    if ($value == "") {
                                        $value = $lang["collection_download_original"];
                                    }
                                }
                                break;

                            case "access_key":
                                if ($value == "") {
                                    continue 2;
                                }

                                $name = $lang["accesskey"];
                                break;

                            case "shared_by":
                                if ($log_entry["access_key"] == "") {
                                    continue 2;
                                }

                                $name = $lang["sharedby"];
                                break;

                            case "ref":
                            case "title": // Used to store resource_type_field name
                            case "revert_enabled":
                            case "previous_value":
                                continue 2;
                            break;

                            default:
                                $name = $column;
                                break;
                        }

                        echo "<tr><td width='50%'>";
                        echo escape((string) $name);
                        echo "</td><td width='50%'>";
                        echo $cleanval ? escape((string) $value) : $value;
                        echo "</td></tr>";
                    }
                }
                ?>
            </table>
        </div>
    </div>
</div>