test

#include <algorithm>

#include <cstdlib>

#include <stack>

#include <functional>

#include <authdb/client.h>

#include <authdb/user.h>

            }

        }

        // Register image widget preview sizes in MEDIA_ALLOWED_SIZES

        if (DocRoot) {

            std::string sizesJson;

            try { getConfig(*Args.database[tid], "MEDIA_ALLOWED_SIZES", sizesJson); } catch (...) {}

            json_object *sizesArr = nullptr;

            if (!sizesJson.empty())

                sizesArr = json_tokener_parse(sizesJson.c_str());

            if (!sizesArr || !json_object_is_type(sizesArr, json_type_array)) {

                if (sizesArr) json_object_put(sizesArr);

                sizesArr = json_object_new_array();

            }

            bool sizesChanged = false;

            // Recursive lambda to traverse widget tree

            std::function<void(const EditPlugin*)> collectImageSizes = [&](const EditPlugin *el) {

                while (el) {

                    if (el->getName() == "Image") {

                        tinyxml2::XMLDocument tmpDoc;

                        tinyxml2::XMLElement *xmlEl = const_cast<EditPlugin*>(el)->toXmlObject(&tmpDoc);

                        if (xmlEl) {

                            int rw = 0, rh = 0;

                            xmlEl->QueryIntAttribute("real_width", &rw);

                            xmlEl->QueryIntAttribute("real_height", &rh);

                            if (rw > 0 || rh > 0) {

                                // Check for duplicates

                                bool found = false;

                                size_t len = json_object_array_length(sizesArr);

                                for (size_t i = 0; i < len; ++i) {

                                    json_object *item = json_object_array_get_idx(sizesArr, i);

                                    json_object *jw = nullptr, *jh = nullptr;

                                    json_object_object_get_ex(item, "w", &jw);

                                    json_object_object_get_ex(item, "h", &jh);

                                    if (json_object_get_int(jw) == rw && json_object_get_int(jh) == rh) {

                                        found = true;

                                        break;

                                    }

                                }

                                if (!found) {

                                    json_object *entry = json_object_new_object();

                                    json_object_object_add(entry, "w", json_object_new_int(rw));

                                    json_object_object_add(entry, "h", json_object_new_int(rh));

                                    json_object_array_add(sizesArr, entry);

                                    sizesChanged = true;

                                }

                            }

                        }

                    }

                    if (el->getChildElement())

                        collectImageSizes(el->getChildElement());

                    el = el->nextElement();

                }

            };

            collectImageSizes(DocRoot);

            if (sizesChanged) {

                setConfig(*Args.database[tid], "MEDIA_ALLOWED_SIZES",

                          json_object_to_json_string_ext(sizesArr, JSON_C_TO_STRING_NOSLASHESCAPE));

            }

            json_object_put(sizesArr);

        }

        // Inject click-to-select and highlight script into rendered preview

        libhtmlpp::HtmlElement selectScript("script");

        selectScript.appendChild(libhtmlpp::TextElement(