Adding upstream version 1.1.1.upstream/1.1.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 1552 insertions, 0 deletions

diff --git a/public/js/action-list.js b/public/js/action-list.js
new file mode 100644
index 0000000..69cab05
--- /dev/null
+++ b/public/js/action-list.js
@@ -0,0 +1,788 @@
+/* Icinga DB Web | (c) 2020 Icinga GmbH | GPLv2 */
+
+;(function (Icinga) {
+
+    "use strict";
+
+    try {
+        var notjQuery = require('icinga/icinga-php-library/notjQuery');
+    } catch (e) {
+        console.warn('Unable to provide input enrichments. Libraries not available:', e);
+        return;
+    }
+
+    Icinga.Behaviors = Icinga.Behaviors || {};
+
+    class ActionList extends Icinga.EventListener {
+        constructor(icinga) {
+            super(icinga);
+
+            this.on('click', '.action-list [data-action-item]:not(.page-separator), .action-list [data-action-item] a[href]', this.onClick, this);
+            this.on('close-column', '#main > #col2', this.onColumnClose, this);
+            this.on('column-moved', this.onColumnMoved, this);
+
+            this.on('rendered', '#main .container', this.onRendered, this);
+            this.on('keydown', '#body', this.onKeyDown, this);
+
+            this.on('click', '.load-more[data-no-icinga-ajax] a', this.onLoadMoreClick, this);
+            this.on('keypress', '.load-more[data-no-icinga-ajax] a', this.onKeyPress, this);
+
+            this.lastActivatedItemUrl = null;
+            this.lastTimeoutId = null;
+            this.isProcessingLoadMore = false;
+            this.activeRequests = {};
+        }
+
+        /**
+         * Parse the filter query contained in the given URL query string
+         *
+         * @param {string} queryString
+         *
+         * @returns {array}
+         */
+        parseSelectionQuery(queryString) {
+            return queryString.split('|');
+        }
+
+        /**
+         * Suspend auto refresh for the given item's container
+         *
+         * @param {Element} item
+         *
+         * @return {string} The container's id
+         */
+        suspendAutoRefresh(item) {
+            const container = item.closest('.container');
+            container.dataset.suspendAutorefresh = '';
+
+            return container.id;
+        }
+
+        /**
+         * Enable auto refresh on the given container
+         *
+         * @param {string} containerId
+         */
+        enableAutoRefresh(containerId) {
+            delete document.getElementById(containerId).dataset.suspendAutorefresh;
+        }
+
+        onClick(event) {
+            let _this = event.data.self;
+            let target = event.currentTarget;
+
+            if (target.matches('a') && (! target.matches('.subject') || event.ctrlKey || event.metaKey)) {
+                return true;
+            }
+
+            event.preventDefault();
+            event.stopImmediatePropagation();
+            event.stopPropagation();
+
+            let item = target.closest('[data-action-item]');
+            let list = target.closest('.action-list');
+            let activeItems = _this.getActiveItems(list);
+            let toActiveItems = [],
+                toDeactivateItems = [];
+
+            const isBeingMultiSelected = list.matches('[data-icinga-multiselect-url]')
+                && (event.ctrlKey || event.metaKey || event.shiftKey);
+
+            if (isBeingMultiSelected) {
+                if (event.ctrlKey || event.metaKey) {
+                    if (item.classList.contains('active')) {
+                        toDeactivateItems.push(item);
+                    } else {
+                        toActiveItems.push(item);
+                    }
+                } else {
+                    document.getSelection().removeAllRanges();
+
+                    let allItems = _this.getAllItems(list);
+
+                    let startIndex = allItems.indexOf(item);
+                    if(startIndex < 0) {
+                        startIndex = 0;
+                    }
+
+                    let endIndex = activeItems.length ? allItems.indexOf(activeItems[0]) : 0;
+                    if (startIndex > endIndex) {
+                        toActiveItems = allItems.slice(endIndex, startIndex + 1);
+                    } else {
+                        endIndex = activeItems.length ? allItems.indexOf(activeItems[activeItems.length - 1]) : 0;
+                        toActiveItems = allItems.slice(startIndex, endIndex + 1);
+                    }
+
+                    toDeactivateItems = activeItems.filter(item => ! toActiveItems.includes(item));
+                    toActiveItems = toActiveItems.filter(item => ! activeItems.includes(item));
+                }
+            } else {
+                toDeactivateItems = activeItems;
+                toActiveItems.push(item);
+            }
+
+            if (activeItems.length === 1
+                && toActiveItems.length === 0
+                && _this.icinga.loader.getLinkTargetFor($(target)).attr('id') === 'col2'
+            ) {
+                _this.icinga.ui.layout1col();
+                _this.enableAutoRefresh('col1');
+                return;
+            }
+
+            let dashboard = list.closest('.dashboard');
+            if (dashboard) {
+                dashboard.querySelectorAll('.action-list').forEach(otherList => {
+                    if (otherList !== list) {
+                        toDeactivateItems.push(..._this.getAllItems(otherList));
+                    }
+                })
+            }
+
+            let lastActivatedUrl = null;
+            if (toActiveItems.includes(item)) {
+                lastActivatedUrl = item.dataset.icingaDetailFilter;
+            } else if (activeItems.length > 1) {
+                lastActivatedUrl = activeItems[activeItems.length - 1] === item
+                    ? activeItems[activeItems.length - 2].dataset.icingaDetailFilter
+                    : activeItems[activeItems.length - 1].dataset.icingaDetailFilter;
+            }
+
+            _this.clearSelection(toDeactivateItems);
+            _this.setActive(toActiveItems);
+
+            if (! dashboard) {
+                _this.addSelectionCountToFooter(list);
+            }
+
+            _this.setLastActivatedItemUrl(lastActivatedUrl);
+            _this.loadDetailUrl(list, target.matches('a') ? target.getAttribute('href') : null);
+        }
+
+        /**
+         * Add the selection count to footer if list allow multi selection
+         *
+         * @param list
+         */
+        addSelectionCountToFooter(list) {
+            if (! list.matches('[data-icinga-multiselect-url]')) {
+                return;
+            }
+
+            let activeItemCount = this.getActiveItems(list).length;
+            let footer = list.closest('.container').querySelector('.footer');
+
+            // For items that do not have a bottom status bar like Downtimes, Comments...
+            if (footer === null) {
+                footer = notjQuery.render(
+                    '<div class="footer" data-action-list-automatically-added>' +
+                            '<div class="selection-count"><span class="selected-items"></span></div>' +
+                        '</div>'
+                )
+
+                list.closest('.container').appendChild(footer);
+            }
+
+            let selectionCount = footer.querySelector('.selection-count');
+            if (selectionCount === null) {
+                selectionCount = notjQuery.render(
+                    '<div class="selection-count"><span class="selected-items"></span></div>'
+                );
+
+                footer.prepend(selectionCount);
+            }
+
+            let selectedItems = selectionCount.querySelector('.selected-items');
+            selectedItems.innerText = activeItemCount
+                ? list.dataset.icingaMultiselectCountLabel.replace('%d', activeItemCount)
+                : list.dataset.icingaMultiselectHintLabel;
+
+            if (activeItemCount === 0) {
+                selectedItems.classList.add('hint');
+            } else {
+                selectedItems.classList.remove('hint');
+            }
+        }
+
+        /**
+         * Key navigation for .action-list
+         *
+         * - `Shift + ArrowUp|ArrowDown` = Multiselect
+         * - `ArrowUp|ArrowDown` = Select next/previous
+         * - `Ctrl|cmd + A` = Select all on currect page
+         *
+         * @param event
+         */
+        onKeyDown(event) {
+            let _this = event.data.self;
+            let list = null;
+            let pressedArrowDownKey = event.key === 'ArrowDown';
+            let pressedArrowUpKey = event.key === 'ArrowUp';
+            let focusedElement = document.activeElement;
+
+            if (
+                _this.isProcessingLoadMore
+                || ! event.key // input auto-completion is triggered
+                || (event.key.toLowerCase() !== 'a' && ! pressedArrowDownKey && ! pressedArrowUpKey)
+            ) {
+                return;
+            }
+
+            if (focusedElement && (
+                focusedElement.matches('#main > :scope')
+                || focusedElement.matches('#body'))
+            ) {
+                let activeItem = document.querySelector(
+                    '#main > .container > .content > .action-list [data-action-item].active'
+                );
+                if (activeItem) {
+                    list = activeItem.closest('.action-list');
+                } else {
+                    list = focusedElement.querySelector('#main > .container > .content > .action-list');
+                }
+            } else if (focusedElement) {
+                list = focusedElement.closest('.content > .action-list');
+            }
+
+            if (! list) {
+                return;
+            }
+
+            let isMultiSelectableList = list.matches('[data-icinga-multiselect-url]');
+
+            if ((event.ctrlKey || event.metaKey) && event.key.toLowerCase() === 'a') {
+                if (! isMultiSelectableList) {
+                    return;
+                }
+
+                event.preventDefault();
+                _this.selectAll(list);
+                return;
+            }
+
+            event.preventDefault();
+
+            let allItems = _this.getAllItems(list);
+            let firstListItem = allItems[0];
+            let lastListItem = allItems[allItems.length -1];
+            let activeItems = _this.getActiveItems(list);
+            let markAsLastActive = null; // initialized only if it is different from toActiveItem
+            let toActiveItem = null;
+            let wasAllSelected = activeItems.length === allItems.length;
+            let lastActivatedItem = list.querySelector(
+                `[data-icinga-detail-filter="${ _this.lastActivatedItemUrl }"]`
+            );
+
+            if (! lastActivatedItem && activeItems.length) {
+                lastActivatedItem = activeItems[activeItems.length - 1];
+            }
+
+            let directionalNextItem = _this.getDirectionalNext(lastActivatedItem, event.key);
+
+            if (activeItems.length === 0) {
+                toActiveItem = pressedArrowDownKey ? firstListItem : lastListItem;
+                // reset all on manual page refresh
+                _this.clearSelection(activeItems);
+                if (toActiveItem.classList.contains('load-more')) {
+                    toActiveItem = toActiveItem.previousElementSibling;
+                }
+            } else if (isMultiSelectableList && event.shiftKey) {
+                if (activeItems.length === 1) {
+                    toActiveItem = directionalNextItem;
+                } else if (wasAllSelected && (
+                    (lastActivatedItem !== firstListItem && pressedArrowDownKey)
+                    || (lastActivatedItem !== lastListItem && pressedArrowUpKey)
+                )) {
+                    if (pressedArrowDownKey) {
+                        toActiveItem = lastActivatedItem === lastListItem ? null : lastListItem;
+                    } else {
+                        toActiveItem = lastActivatedItem === firstListItem ? null : lastListItem;
+                    }
+
+                } else if (directionalNextItem && directionalNextItem.classList.contains('active')) {
+                    // deactivate last activated by down to up select
+                    _this.clearSelection([lastActivatedItem]);
+                    if (wasAllSelected) {
+                        _this.scrollItemIntoView(lastActivatedItem, event.key);
+                    }
+
+                    toActiveItem = directionalNextItem;
+                } else {
+                    [toActiveItem, markAsLastActive] = _this.findToActiveItem(lastActivatedItem, event.key);
+                }
+            } else {
+                toActiveItem = directionalNextItem ?? lastActivatedItem;
+
+                if (toActiveItem) {
+                    if (toActiveItem.classList.contains('load-more')) {
+                        clearTimeout(_this.lastTimeoutId);
+                        _this.handleLoadMoreNavigate(toActiveItem, lastActivatedItem, event.key);
+                        return;
+                    }
+
+                    _this.clearSelection(activeItems);
+                    if (toActiveItem.classList.contains('page-separator')) {
+                        toActiveItem = _this.getDirectionalNext(toActiveItem, event.key);
+                    }
+                }
+            }
+
+            if (! toActiveItem) {
+                return;
+            }
+
+            _this.setActive(toActiveItem);
+            _this.setLastActivatedItemUrl(
+                markAsLastActive ? markAsLastActive.dataset.icingaDetailFilter : toActiveItem.dataset.icingaDetailFilter
+            );
+            _this.scrollItemIntoView(toActiveItem, event.key);
+            _this.addSelectionCountToFooter(list);
+            _this.loadDetailUrl(list);
+        }
+
+        /**
+         * Get the next list item according to the pressed key (`ArrowUp` or `ArrowDown`)
+         *
+         * @param item The list item from which we want the next item
+         * @param eventKey Pressed key (`ArrowUp` or `ArrowDown`)
+         *
+         * @returns {Element|null}
+         */
+        getDirectionalNext(item, eventKey) {
+            if (! item) {
+                return null;
+            }
+
+            return eventKey === 'ArrowUp' ? item.previousElementSibling : item.nextElementSibling;
+        }
+
+        /**
+         * Find the list item that should be activated next
+         *
+         * @param lastActivatedItem
+         * @param eventKey Pressed key (`ArrowUp` or `ArrowDown`)
+         *
+         * @returns {Element[]}
+         */
+        findToActiveItem(lastActivatedItem, eventKey) {
+            let toActiveItem;
+            let markAsLastActive;
+
+            toActiveItem = this.getDirectionalNext(lastActivatedItem, eventKey);
+
+            while (toActiveItem) {
+                if (! toActiveItem.classList.contains('active')) {
+                    break;
+                }
+
+                toActiveItem = this.getDirectionalNext(toActiveItem, eventKey);
+            }
+
+            markAsLastActive = toActiveItem;
+            // if the next/previous sibling element is already active,
+            // mark the last/first active element in list as last active
+            while (markAsLastActive && this.getDirectionalNext(markAsLastActive, eventKey)) {
+                if (! this.getDirectionalNext(markAsLastActive, eventKey).classList.contains('active')) {
+                    break;
+                }
+
+                markAsLastActive = this.getDirectionalNext(markAsLastActive, eventKey);
+            }
+
+            return [toActiveItem, markAsLastActive];
+        }
+
+        /**
+         * Select All list items
+         *
+         * @param list The action list
+         */
+        selectAll(list) {
+            let allItems = this.getAllItems(list);
+            let activeItems = this.getActiveItems(list);
+            this.setActive(allItems.filter(item => ! activeItems.includes(item)));
+            this.setLastActivatedItemUrl(allItems[allItems.length -1].dataset.icingaDetailFilter);
+            this.addSelectionCountToFooter(list);
+            this.loadDetailUrl(list);
+        }
+
+        /**
+         * Clear the selection by removing .active class
+         *
+         * @param selectedItems The items with class active
+         */
+        clearSelection(selectedItems) {
+            selectedItems.forEach(item => item.classList.remove('active'));
+        }
+
+        /**
+         * Set the last activated item Url
+         *
+         * @param url
+         */
+        setLastActivatedItemUrl (url) {
+            this.lastActivatedItemUrl = url;
+        }
+
+        /**
+         * Scroll the given item into view
+         *
+         * @param item Item to scroll into view
+         * @param pressedKey Pressed key (`ArrowUp` or `ArrowDown`)
+         */
+        scrollItemIntoView(item, pressedKey) {
+            item.scrollIntoView({block: "nearest"});
+            let directionalNext = this.getDirectionalNext(item, pressedKey);
+
+            if (directionalNext) {
+                directionalNext.scrollIntoView({block: "nearest"});
+            }
+        }
+
+        /**
+         * Load the detail url with selected items
+         *
+         * @param list The action list
+         * @param anchorUrl If any anchor is clicked (e.g. host in service list)
+         */
+        loadDetailUrl(list, anchorUrl = null) {
+            let url = anchorUrl;
+            let activeItems = this.getActiveItems(list);
+
+            if (url === null) {
+                if (activeItems.length > 1) {
+                    url = this.createMultiSelectUrl(activeItems);
+                } else {
+                    let anchor = activeItems[0].querySelector('[href]');
+                    url = anchor ? anchor.getAttribute('href') : null;
+                }
+            }
+
+            if (url === null) {
+                return;
+            }
+
+            const suspendedContainer = this.suspendAutoRefresh(list);
+
+            clearTimeout(this.lastTimeoutId);
+            this.lastTimeoutId = setTimeout(() => {
+                const requestNo = this.lastTimeoutId;
+                this.activeRequests[requestNo] = suspendedContainer;
+                this.lastTimeoutId = null;
+
+                let req = this.icinga.loader.loadUrl(
+                    url,
+                    this.icinga.loader.getLinkTargetFor($(activeItems[0]))
+                );
+
+                req.always((_, __, errorThrown) => {
+                    if (errorThrown !== 'abort') {
+                        this.enableAutoRefresh(this.activeRequests[requestNo]);
+                    }
+
+                    delete this.activeRequests[requestNo];
+                });
+            }, 250);
+        }
+
+        /**
+         * Add .active class to given list item
+         *
+         * @param toActiveItem The list item(s)
+         */
+        setActive(toActiveItem) {
+            if (toActiveItem instanceof HTMLElement) {
+                toActiveItem.classList.add('active');
+            } else {
+                toActiveItem.forEach(item => item.classList.add('active'));
+            }
+        }
+
+        /**
+         * Get the active items from given list
+         *
+         * @param list The action list
+         *
+         * @return array
+         */
+        getActiveItems(list)
+        {
+            let items;
+            if (list.tagName.toLowerCase() === 'table') {
+                items = list.querySelectorAll(':scope > tbody > [data-action-item].active');
+            } else {
+                items = list.querySelectorAll(':scope > [data-action-item].active');
+            }
+
+            return Array.from(items);
+        }
+
+        /**
+         * Get all available items from given list
+         *
+         * @param list The action list
+         *
+         * @return array
+         */
+        getAllItems(list)
+        {
+            let items;
+            if (list.tagName.toLowerCase() === 'table') {
+                items = list.querySelectorAll(':scope > tbody > [data-action-item]');
+            } else {
+                items = list.querySelectorAll(':scope > [data-action-item]');
+            }
+
+            return Array.from(items);
+        }
+
+        /**
+         * Handle the navigation on load-more button
+         *
+         * @param loadMoreElement
+         * @param lastActivatedItem
+         * @param pressedKey Pressed key (`ArrowUp` or `ArrowDown`)
+         */
+        handleLoadMoreNavigate(loadMoreElement, lastActivatedItem, pressedKey) {
+            let req = this.loadMore(loadMoreElement.firstChild);
+            this.isProcessingLoadMore = true;
+            req.done(() => {
+                this.isProcessingLoadMore = false;
+                // list has now new items, so select the lastActivatedItem and then move forward
+                let toActiveItem = lastActivatedItem.nextElementSibling;
+                while (toActiveItem) {
+                    if (toActiveItem.hasAttribute('data-action-item')) {
+                        this.clearSelection([lastActivatedItem]);
+                        this.setActive(toActiveItem);
+                        this.setLastActivatedItemUrl(toActiveItem.dataset.icingaDetailFilter);
+                        this.scrollItemIntoView(toActiveItem, pressedKey);
+                        this.addSelectionCountToFooter(toActiveItem.parentElement);
+                        this.loadDetailUrl(toActiveItem.parentElement);
+                        return;
+                    }
+
+                    toActiveItem = toActiveItem.nextElementSibling;
+                }
+            });
+        }
+
+        /**
+         * Click on load-more button
+         *
+         * @param event
+         *
+         * @returns {boolean}
+         */
+        onLoadMoreClick(event) {
+            event.stopPropagation();
+            event.preventDefault();
+
+            event.data.self.loadMore(event.target);
+
+            return false;
+        }
+
+        onKeyPress(event) {
+            if (event.key === ' ') { // space
+                event.data.self.onLoadMoreClick(event);
+            }
+        }
+
+        /**
+         * Load more list items based on the given anchor
+         *
+         * @param anchor
+         *
+         * @returns {*|{getAllResponseHeaders: function(): *|null, abort: function(*): this, setRequestHeader: function(*, *): this, readyState: number, getResponseHeader: function(*): null|*, overrideMimeType: function(*): this, statusCode: function(*): this}|jQuery|boolean}
+         */
+        loadMore(anchor) {
+            let showMore = anchor.parentElement;
+            var progressTimer = this.icinga.timer.register(function () {
+                var label = anchor.innerText;
+
+                var dots = label.substr(-3);
+                if (dots.slice(0, 1) !== '.') {
+                    dots = '.  ';
+                } else {
+                    label = label.slice(0, -3);
+                    if (dots === '...') {
+                        dots = '.  ';
+                    } else if (dots === '.. ') {
+                        dots = '...';
+                    } else if (dots === '.  ') {
+                        dots = '.. ';
+                    }
+                }
+
+                anchor.innerText = label + dots;
+            }, null, 250);
+
+            let url = anchor.getAttribute('href');
+            let req = this.icinga.loader.loadUrl(
+                // Add showCompact, we don't want controls in paged results
+                this.icinga.utils.addUrlFlag(url, 'showCompact'),
+                $(showMore.parentElement),
+                undefined,
+                undefined,
+                'append',
+                false,
+                progressTimer
+            );
+            req.addToHistory = false;
+            req.done(function () {
+                showMore.remove();
+
+                // Set data-icinga-url to make it available for Icinga.History.getCurrentState()
+                req.$target.closest('.container').data('icingaUrl', url);
+
+                this.icinga.history.replaceCurrentState();
+            });
+
+            return req;
+        }
+
+        /**
+         * Create the detail url for multi selectable list
+         *
+         * @param items List items
+         * @param withBaseUrl Default to true
+         *
+         * @returns {string} The url
+         */
+        createMultiSelectUrl(items, withBaseUrl = true) {
+            let filters = [];
+            items.forEach(item => {
+                filters.push(item.getAttribute('data-icinga-multiselect-filter'));
+            });
+
+            let url = '?' + filters.join('|');
+
+            if (withBaseUrl) {
+                return items[0].closest('.action-list').getAttribute('data-icinga-multiselect-url') + url;
+            }
+
+            return url;
+        }
+
+        onColumnClose(event) {
+            let _this = event.data.self;
+            let list = _this.findDetailUrlActionList(document.getElementById('col1'));
+            if (list && list.matches('[data-icinga-multiselect-url], [data-icinga-detail-url]')) {
+                _this.clearSelection(_this.getActiveItems(list));
+                _this.addSelectionCountToFooter(list);
+            }
+        }
+
+        /**
+         * Find the action list using the detail url
+         *
+         * @param {Element} container
+         *
+         * @return Element|null
+         */
+        findDetailUrlActionList(container) {
+            let detailUrl = this.icinga.utils.parseUrl(
+                this.icinga.history.getCol2State().replace(/^#!/, '')
+            );
+
+            let detailItem = container.querySelector(
+                '[data-icinga-detail-filter="'
+                + detailUrl.query.replace('?', '') + '"],' +
+                '[data-icinga-multiselect-filter="'
+                + detailUrl.query.split('|', 1).toString().replace('?', '') + '"]'
+            );
+
+            return detailItem ? detailItem.parentElement : null;
+        }
+
+        /**
+         * Triggers when column is moved to left or right
+         *
+         * @param event
+         * @param sourceId The content is moved from
+         */
+        onColumnMoved(event, sourceId) {
+            let _this = event.data.self;
+
+            if (event.target.id === 'col2' && sourceId === 'col1') { // only for browser-back (col1 shifted to col2)
+                _this.clearSelection(event.target.querySelectorAll('.action-list .active'));
+            } else if (event.target.id === 'col1' && sourceId === 'col2') {
+                for (const requestNo of Object.keys(_this.activeRequests)) {
+                    if (_this.activeRequests[requestNo] === sourceId) {
+                        _this.enableAutoRefresh(_this.activeRequests[requestNo]);
+                        _this.activeRequests[requestNo] = _this.suspendAutoRefresh(event.target);
+                    }
+                }
+            }
+        }
+
+        onRendered(event, isAutoRefresh) {
+            let _this = event.data.self;
+            let container = event.target;
+            let isTopLevelContainer = container.matches('#main > :scope');
+
+            let list;
+            if (event.currentTarget !== container || Object.keys(_this.activeRequests).length) {
+                // Nested containers are not processed multiple times || still processing selection/navigation request
+                return;
+            } else if (isTopLevelContainer && container.id !== 'col1') {
+                if (isAutoRefresh) {
+                    return;
+                }
+
+                // only for browser back/forward navigation
+                list = _this.findDetailUrlActionList(document.getElementById('col1'));
+            } else {
+                list = _this.findDetailUrlActionList(container);
+            }
+
+            if (list && list.matches('[data-icinga-multiselect-url], [data-icinga-detail-url]')) {
+                let detailUrl = _this.icinga.utils.parseUrl(
+                    _this.icinga.history.getCol2State().replace(/^#!/, '')
+                );
+                let toActiveItems = [];
+                if (list.dataset.icingaMultiselectUrl === detailUrl.path) {
+                    for (const filter of _this.parseSelectionQuery(detailUrl.query.slice(1))) {
+                        let item = list.querySelector(
+                            '[data-icinga-multiselect-filter="' + filter + '"]'
+                        );
+
+                        if (item) {
+                            toActiveItems.push(item);
+                        }
+                    }
+                } else if (_this.matchesDetailUrl(list.dataset.icingaDetailUrl, detailUrl.path)) {
+                    let item = list.querySelector(
+                        '[data-icinga-detail-filter="' + detailUrl.query.slice(1) + '"]'
+                    );
+
+                    if (item) {
+                        toActiveItems.push(item);
+                    }
+                }
+
+                _this.clearSelection(_this.getAllItems(list).filter(item => !toActiveItems.includes(item)));
+                _this.setActive(toActiveItems);
+            }
+
+            if (isTopLevelContainer) {
+                let footerList = list ?? container.querySelector('.content > .action-list');
+                if (footerList) {
+                    _this.addSelectionCountToFooter(footerList);
+                }
+            }
+        }
+
+        matchesDetailUrl(itemUrl, detailUrl) {
+            if (itemUrl === detailUrl) {
+                return true;
+            }
+
+            // The slash is used to avoid false positives (e.g. icingadb/hostgroup and icingadb/host)
+            return detailUrl.startsWith(itemUrl + '/');
+        }
+    }
+
+    Icinga.Behaviors.ActionList = ActionList;
+
+}(Icinga));
diff --git a/public/js/migrate.js b/public/js/migrate.js
new file mode 100644
index 0000000..dddbaed
--- /dev/null
+++ b/public/js/migrate.js
@@ -0,0 +1,654 @@
+/* Icinga DB Web | (c) 2020 Icinga GmbH | GPLv2 */
+
+;(function(Icinga, $) {
+
+    'use strict';
+
+    const ANIMATION_LENGTH = 350;
+
+    const POPUP_HTML = '<div class="icinga-module module-icingadb">\n' +
+        '   <div id="migrate-popup">\n' +
+        '       <div class="suggestion-area">\n' +
+        '           <button type="button" class="close">Don\'t show this again</button>\n' +
+        '           <ul class="search-migration-suggestions"></ul>\n' +
+        '           <p class="search-migration-hint">Miss some results? Try the link(s) below</p>\n' +
+        '           <ul class="monitoring-migration-suggestions"></ul>\n' +
+        '           <p class="monitoring-migration-hint">Preview this in Icinga DB</p>\n' +
+        '       </div>\n' +
+        '       <div class="minimizer"><i class="icon-"></i></div>\n' +
+        '    </div>\n' +
+        '</div>';
+
+    const SUGGESTION_HTML = '<li>\n' +
+        '   <button type="button" value="1"></button>\n' +
+        '   <button type="button" value="0"><i class="icon-"></i></button>\n' +
+        '</li>';
+
+    Icinga.Behaviors = Icinga.Behaviors || {};
+
+    /**
+     * Icinga DB Migration behavior.
+     *
+     * @param icinga {Icinga} The current Icinga Object
+     */
+    class Migrate extends Icinga.EventListener {
+        constructor(icinga) {
+            super(icinga);
+
+            this.knownMigrations = {};
+            this.knownBackendSupport = {};
+            this.urlMigrationReadyState = null;
+            this.backendSupportReadyState = null;
+            this.searchMigrationReadyState = null;
+            this.backendSupportRelated = {};
+            this.$popup = null;
+
+            // Some persistence, we don't want to annoy our users too much
+            this.storage = Icinga.Storage.BehaviorStorage('icingadb.migrate');
+            this.tempStorage = Icinga.Storage.BehaviorStorage('icingadb.migrate');
+            this.tempStorage.setBackend(window.sessionStorage);
+            this.previousMigrations = {};
+
+            // We don't want to ask the server to migrate non-monitoring urls
+            this.isMonitoringUrl = new RegExp('^' + icinga.config.baseUrl + '/monitoring/');
+
+            this.on('rendered', this.onRendered, this);
+            this.on('close-column', this.onColumnClose, this);
+            this.on('click', '#migrate-popup button.close', this.onClose, this);
+            this.on('click', '#migrate-popup li button', this.onDecision, this);
+            this.on('click', '#migrate-popup .minimizer', this.onHandleClicked, this);
+            this.storage.onChange('minimized', this.onMinimized, this);
+        }
+
+        update(data) {
+            if (data !== 'bogus') {
+                return;
+            }
+
+            $.each(this.backendSupportRelated, (id, _) => {
+                let $container = $('#' + id);
+                let req = this.icinga.loader.loadUrl($container.data('icingaUrl'), $container);
+                req.addToHistory = false;
+                req.scripted = true;
+            });
+        }
+
+        onRendered(event) {
+            var _this = event.data.self;
+            var $target = $(event.target);
+
+            if (_this.tempStorage.get('closed') || $('#layout.fullscreen-layout').length) {
+                // Don't bother in case the user closed the popup or we're in fullscreen
+                return;
+            }
+
+            if (!$target.is('#main > .container')) {
+                if ($target.is('#main .container')) {
+                    var attrUrl = $target.attr('data-icinga-url');
+                    var dataUrl = $target.data('icingaUrl');
+                    if (!! attrUrl && attrUrl !== dataUrl) {
+                        // Search urls are redirected, update any migration suggestions
+                        _this.prepareMigration($target);
+                        return;
+                    }
+                }
+
+                // We are else really only interested in top-level containers
+                return;
+            }
+
+            var $dashboard = $target.children('.dashboard');
+            if ($dashboard.length) {
+                // After a page load dashlets have no id as `renderContentToContainer()` didn't ran yet
+                _this.icinga.ui.assignUniqueContainerIds();
+
+                $target = $dashboard.children('.container');
+            }
+
+            _this.prepareMigration($target);
+        }
+
+        prepareMigration($target) {
+            let monitoringUrls = {};
+            let searchUrls = {};
+            let modules = {}
+
+            $target.each((_, container) => {
+                let $container = $(container);
+                let href = decodeURIComponent($container.data('icingaUrl'));
+                let containerId = $container.attr('id');
+
+                if (!!href) {
+                    if (
+                        typeof this.previousMigrations[containerId] !== 'undefined'
+                        && this.previousMigrations[containerId] === href
+                    ) {
+                        delete this.previousMigrations[containerId];
+                    } else {
+                        if (href.match(this.isMonitoringUrl)) {
+                            monitoringUrls[containerId] = href;
+                        } else if ($container.find('[data-enrichment-type="search-bar"]').length) {
+                            searchUrls[containerId] = href;
+                        }
+                    }
+                }
+
+                let moduleName = $container.data('icingaModule');
+                if (!! moduleName && moduleName !== 'default' && moduleName !== 'monitoring' && moduleName !== 'icingadb') {
+                    modules[containerId] = moduleName;
+                }
+            });
+
+            if (Object.keys(monitoringUrls).length) {
+                this.setUrlMigrationReadyState(false);
+                this.migrateUrls(monitoringUrls, 'monitoring');
+            } else {
+                this.setUrlMigrationReadyState(null);
+            }
+
+            if (Object.keys(searchUrls).length) {
+                this.setSearchMigrationReadyState(false);
+                this.migrateUrls(searchUrls, 'search');
+            } else {
+                this.setSearchMigrationReadyState(null);
+            }
+
+            if (Object.keys(modules).length) {
+                this.setBackendSupportReadyState(false);
+                this.prepareBackendCheckboxForm(modules);
+            } else {
+                this.setBackendSupportReadyState(null);
+            }
+
+            if (
+                this.urlMigrationReadyState === null
+                && this.backendSupportReadyState === null
+                && this.searchMigrationReadyState === null
+            ) {
+                this.cleanupPopup();
+            }
+        }
+
+        onColumnClose(event) {
+            var _this = event.data.self;
+            _this.Popup().find('.suggestion-area > ul li').each(function () {
+                var $suggestion = $(this);
+                var suggestionUrl = $suggestion.data('containerUrl');
+                var $container = $('#' + $suggestion.data('containerId'));
+
+                var containerUrl = '';
+                if ($container.length) {
+                    containerUrl = decodeURIComponent($container.data('icingaUrl'));
+                }
+
+                if (suggestionUrl !== containerUrl) {
+                    var $newContainer = $('#main > .container').filter(function () {
+                        return decodeURIComponent($(this).data('icingaUrl')) === suggestionUrl;
+                    });
+                    if ($newContainer.length) {
+                        // Container moved
+                        $suggestion.attr('id', 'suggest-' + $newContainer.attr('id'));
+                        $suggestion.data('containerId', $newContainer.attr('id'));
+                    }
+                }
+            });
+
+            let backendSupportRelated = { ..._this.backendSupportRelated };
+            $.each(backendSupportRelated, (id, module) => {
+                let $container = $('#' + id);
+                if (! $container.length || $container.data('icingaModule') !== module) {
+                    let $newContainer = $('#main > .container').filter(function () {
+                        return $(this).data('icingaModule') === module;
+                    });
+                    if ($newContainer.length) {
+                        _this.backendSupportRelated[$newContainer.attr('id')] = module;
+                    }
+
+                    delete _this.backendSupportRelated[id];
+                }
+            });
+
+            _this.cleanupPopup();
+        }
+
+        onClose(event) {
+            var _this = event.data.self;
+            _this.tempStorage.set('closed', true);
+            _this.hidePopup();
+        }
+
+        onDecision(event) {
+            var _this = event.data.self;
+            var $button = $(event.target).closest('button');
+            var $suggestion = $button.parent();
+            var $container = $('#' + $suggestion.data('containerId'));
+            var containerUrl = decodeURIComponent($container.data('icingaUrl'));
+
+            if ($button.attr('value') === '1') {
+                // Yes
+                var newHref = _this.knownMigrations[containerUrl];
+                _this.icinga.loader.loadUrl(newHref, $container);
+
+                _this.previousMigrations[$suggestion.data('containerId')] = containerUrl;
+
+                if ($container.parent().is('.dashboard')) {
+                    $container.find('h1 a').attr('href', _this.icinga.utils.removeUrlParams(newHref, ['showCompact']));
+                }
+            } else {
+                // No
+                _this.knownMigrations[containerUrl] = false;
+            }
+
+            if (_this.Popup().find('li').length === 1 && ! _this.Popup().find('#setAsBackendForm').length) {
+                _this.hidePopup(function () {
+                    // Let the transition finish first, looks cleaner
+                    $suggestion.remove();
+                });
+            } else {
+                $suggestion.remove();
+            }
+        }
+
+        onHandleClicked(event) {
+            var _this = event.data.self;
+            if (_this.togglePopup()) {
+                _this.storage.set('minimized', true);
+            } else {
+                _this.storage.remove('minimized');
+            }
+        }
+
+        onMinimized(isMinimized, oldValue) {
+            if (isMinimized && isMinimized !== oldValue && this.isShown()) {
+                this.minimizePopup();
+            }
+        }
+
+        migrateUrls(urls, type) {
+            var _this = this,
+                containerIds = [],
+                containerUrls = [];
+
+            $.each(urls, function (containerId, containerUrl) {
+                if (typeof _this.knownMigrations[containerUrl] === 'undefined') {
+                    containerUrls.push(containerUrl);
+                    containerIds.push(containerId);
+                }
+            });
+
+            let endpoint, changeCallback;
+            if (type === 'monitoring') {
+                endpoint = 'monitoring-url';
+                changeCallback = this.changeUrlMigrationReadyState.bind(this);
+            } else {
+                endpoint = 'search-url';
+                changeCallback = this.changeSearchMigrationReadyState.bind(this);
+            }
+
+            if (containerUrls.length) {
+                var req = $.ajax({
+                    context: this,
+                    type: 'post',
+                    url: this.icinga.config.baseUrl + '/icingadb/migrate/' + endpoint,
+                    headers: {'Accept': 'application/json'},
+                    contentType: 'application/json',
+                    data: JSON.stringify(containerUrls)
+                });
+
+                req.urls = urls;
+                req.suggestionType = type;
+                req.urlIndexToContainerId = containerIds;
+                req.done(this.processUrlMigrationResults);
+                req.always(() => changeCallback(true));
+            } else {
+                // All urls have already been migrated once, show popup immediately
+                this.addSuggestions(urls, type);
+                changeCallback(true);
+            }
+        }
+
+        processUrlMigrationResults(data, textStatus, req) {
+            var _this = this;
+            var result, containerId;
+
+            if (data.status === 'success') {
+                result = data.data;
+            } else {  // if (data.status === 'fail')
+                result = data.data.result;
+
+                $.each(data.data.errors, function (k, error) {
+                    _this.icinga.logger.error('[Migrate] Erroneous url "' + k + '": ' + error[0] + '\n' + error[1]);
+                });
+            }
+
+            $.each(result, function (i, migratedUrl) {
+                containerId = req.urlIndexToContainerId[i];
+                _this.knownMigrations[req.urls[containerId]] = migratedUrl;
+            });
+
+            this.addSuggestions(req.urls, req.suggestionType);
+        }
+
+        prepareBackendCheckboxForm(modules) {
+            let containerIds = [];
+            let moduleNames = [];
+
+            $.each(modules, (id, module) => {
+                if (typeof this.knownBackendSupport[module] === 'undefined') {
+                    containerIds.push(id);
+                    moduleNames.push(module);
+                }
+            });
+
+            if (moduleNames.length) {
+                let req = $.ajax({
+                    context     : this,
+                    type        : 'post',
+                    url         : this.icinga.config.baseUrl + '/icingadb/migrate/backend-support',
+                    headers     : { 'Accept': 'application/json' },
+                    contentType : 'application/json',
+                    data        : JSON.stringify(moduleNames)
+                });
+
+                req.modules = modules;
+                req.moduleIndexToContainerId = containerIds;
+                req.done(this.processBackendSupportResults);
+                req.always(() => this.changeBackendSupportReadyState(true));
+            } else {
+                // All modules have already been checked once, show popup immediately
+                this.setupBackendCheckboxForm(modules);
+                this.changeBackendSupportReadyState(true);
+            }
+        }
+
+        processBackendSupportResults(data, textStatus, req) {
+            let result = data.data;
+
+            $.each(result, (i, state) => {
+                let containerId = req.moduleIndexToContainerId[i];
+                this.knownBackendSupport[req.modules[containerId]] = state;
+            });
+
+            this.setupBackendCheckboxForm(req.modules);
+        }
+
+        setupBackendCheckboxForm(modules) {
+            let supportedModules = {};
+
+            $.each(modules, (id, module) => {
+                if (this.knownBackendSupport[module]) {
+                    supportedModules[id] = module;
+                }
+            });
+
+            if (Object.keys(supportedModules).length) {
+                this.backendSupportRelated = { ...this.backendSupportRelated, ...supportedModules };
+
+                let req = $.ajax({
+                    context : this,
+                    type    : 'get',
+                    url     : this.icinga.config.baseUrl + '/icingadb/migrate/checkbox-state?showCompact'
+                });
+
+                req.done(this.setCheckboxState);
+            }
+        }
+
+        setCheckboxState(html, textStatus, req) {
+            let $form = this.Popup().find('.suggestion-area > #setAsBackendForm');
+            if (! $form.length) {
+                $form = $(html);
+                $form.attr('data-base-target', 'migrate-popup-backend-submit-blackhole');
+                $form.append('<div id="migrate-popup-backend-submit-blackhole"></div>');
+
+                this.Popup().find('.monitoring-migration-suggestions').before($form);
+            } else {
+                let $newForm = $(html);
+                $form.find('[name=backend]').prop('checked', $newForm.find('[name=backend]').is(':checked'));
+            }
+
+            this.showPopup();
+        }
+
+        addSuggestions(urls, type) {
+            var where;
+            if (type === 'monitoring') {
+                where = '.monitoring-migration-suggestions';
+            } else {
+                where = '.search-migration-suggestions';
+            }
+
+            var _this = this,
+                hasSuggestions = false,
+                $ul = this.Popup().find('.suggestion-area > ul' + where);
+            $.each(urls, function (containerId, containerUrl) {
+                // No urls for which the user clicked "No" or an error occurred and only migrated urls please
+                if (_this.knownMigrations[containerUrl] !== false && _this.knownMigrations[containerUrl] !== containerUrl) {
+                    var $container = $('#' + containerId);
+
+                    var $suggestion = $ul.find('li#suggest-' + containerId);
+                    if ($suggestion.length) {
+                        if ($suggestion.data('containerUrl') === containerUrl) {
+                            // There's already a suggestion for this exact container and url
+                            hasSuggestions = true;
+                            return;
+                        }
+
+                        $suggestion.data('containerUrl', containerUrl);
+                    } else {
+                        $suggestion = $(SUGGESTION_HTML);
+                        $suggestion.attr('id', 'suggest-' + containerId);
+                        $suggestion.data('containerId', containerId);
+                        $suggestion.data('containerUrl', containerUrl);
+                        $ul.append($suggestion);
+                    }
+
+                    hasSuggestions = true;
+
+                    var title;
+                    if ($container.data('icingaTitle')) {
+                        title = $container.data('icingaTitle').split(' :: ').slice(0, -1).join(' :: ');
+                    } else if ($container.parent().is('.dashboard')) {
+                        title = $container.find('h1 a').text();
+                    } else {
+                        title = $container.find('.tabs li.active a').text();
+                    }
+
+                    $suggestion.find('button:first-of-type').text(title);
+                }
+            });
+
+            if (hasSuggestions) {
+                this.showPopup();
+                if (type === 'search') {
+                    this.maximizePopup();
+                }
+            }
+        }
+
+        cleanupSuggestions() {
+            var _this = this,
+                toBeRemoved = [];
+            this.Popup().find('li').each(function () {
+                var $suggestion = $(this);
+                var $container = $('#' + $suggestion.data('containerId'));
+                var containerUrl = decodeURIComponent($container.data('icingaUrl'));
+                if (
+                    // Unknown url, yet
+                    typeof _this.knownMigrations[containerUrl] === 'undefined'
+                    // User doesn't want to migrate
+                    || _this.knownMigrations[containerUrl] === false
+                    // Already migrated or no migration necessary
+                    || containerUrl === _this.knownMigrations[containerUrl]
+                    // The container URL changed
+                    || containerUrl !== $suggestion.data('containerUrl')
+                ) {
+                    toBeRemoved.push($suggestion);
+                }
+            });
+
+            return toBeRemoved;
+        }
+
+        cleanupBackendForm() {
+            let $form = this.Popup().find('#setAsBackendForm');
+            if (! $form.length) {
+                return false;
+            }
+
+            let stillRelated = {};
+            $.each(this.backendSupportRelated, (id, module) => {
+                let $container = $('#' + id);
+                if ($container.length && $container.data('icingaModule') === module) {
+                    stillRelated[id] = module;
+                }
+            });
+
+            this.backendSupportRelated = stillRelated;
+
+            if (Object.keys(stillRelated).length) {
+                return true;
+            }
+
+            return $form;
+        }
+
+        cleanupPopup() {
+            let toBeRemoved = this.cleanupSuggestions();
+            let hasBackendForm = this.cleanupBackendForm();
+
+            if (hasBackendForm !== true && this.Popup().find('li').length === toBeRemoved.length) {
+                this.hidePopup(() => {
+                    // Let the transition finish first, looks cleaner
+                    $.each(toBeRemoved, function (_, $suggestion) {
+                        $suggestion.remove();
+                    });
+
+                    if (typeof hasBackendForm === 'object') {
+                        hasBackendForm.remove();
+                    }
+                });
+            } else {
+                $.each(toBeRemoved, function (_, $suggestion) {
+                    $suggestion.remove();
+                });
+
+                if (typeof hasBackendForm === 'object') {
+                    hasBackendForm.remove();
+                }
+
+                // Let showPopup() handle the automatic minimization in case all search suggestions have been removed
+                this.showPopup();
+            }
+        }
+
+        showPopup() {
+            var $popup = this.Popup();
+            if (this.storage.get('minimized') && ! this.forceFullyMaximized()) {
+                if (this.isShown()) {
+                    this.minimizePopup();
+                } else {
+                    $popup.addClass('active minimized hidden');
+                }
+            } else {
+                $popup.addClass('active');
+            }
+        }
+
+        hidePopup(after) {
+            this.Popup().removeClass('active minimized hidden');
+
+            if (typeof after === 'function') {
+                setTimeout(after, ANIMATION_LENGTH);
+            }
+        }
+
+        isShown() {
+            return this.Popup().is('.active');
+        }
+
+        minimizePopup() {
+            var $popup = this.Popup();
+            $popup.addClass('minimized');
+            setTimeout(function () {
+                $popup.addClass('hidden');
+            }, ANIMATION_LENGTH);
+        }
+
+        maximizePopup() {
+            this.Popup().removeClass('minimized hidden');
+        }
+
+        forceFullyMaximized() {
+            return this.Popup().find('.search-migration-suggestions:not(:empty)').length > 0;
+        }
+
+        togglePopup() {
+            if (this.Popup().is('.minimized')) {
+                this.maximizePopup();
+                return false;
+            } else {
+                this.minimizePopup();
+                return true;
+            }
+        }
+
+        setUrlMigrationReadyState(state) {
+            this.urlMigrationReadyState = state;
+        }
+
+        changeUrlMigrationReadyState(state) {
+            this.setUrlMigrationReadyState(state);
+
+            if (this.backendSupportReadyState !== false && this.searchMigrationReadyState !== false) {
+                this.searchMigrationReadyState = null;
+                this.backendSupportReadyState = null;
+                this.urlMigrationReadyState = null;
+                this.cleanupPopup();
+            }
+        }
+
+        setSearchMigrationReadyState(state) {
+            this.searchMigrationReadyState = state;
+        }
+
+        changeSearchMigrationReadyState(state) {
+            this.setSearchMigrationReadyState(state);
+
+            if (this.backendSupportReadyState !== false && this.urlMigrationReadyState !== false) {
+                this.searchMigrationReadyState = null;
+                this.backendSupportReadyState = null;
+                this.urlMigrationReadyState = null;
+                this.cleanupPopup();
+            }
+        }
+
+        setBackendSupportReadyState(state) {
+            this.backendSupportReadyState = state;
+        }
+
+        changeBackendSupportReadyState(state) {
+            this.setBackendSupportReadyState(state);
+
+            if (this.urlMigrationReadyState !== false && this.searchMigrationReadyState !== false) {
+                this.searchMigrationReadyState = null;
+                this.backendSupportReadyState = null;
+                this.urlMigrationReadyState = null;
+                this.cleanupPopup();
+            }
+        }
+
+        Popup() {
+            // Node.contains() is used due to `?renderLayout`
+            if (this.$popup === null || ! document.body.contains(this.$popup[0])) {
+                $('#layout').append($(POPUP_HTML));
+                this.$popup = $('#migrate-popup');
+            }
+
+            return this.$popup;
+        }
+    }
+
+    Icinga.Behaviors.Migrate = Migrate;
+
+})(Icinga, jQuery);
diff --git a/public/js/progress-bar.js b/public/js/progress-bar.js
new file mode 100644
index 0000000..be24f1c
--- /dev/null
+++ b/public/js/progress-bar.js
@@ -0,0 +1,110 @@
+(function (Icinga) {
+
+    "use strict";
+
+    class ProgressBar extends Icinga.EventListener {
+        constructor(icinga)
+        {
+            super(icinga);
+
+            /**
+             * Frame update threshold. If it reaches zero, the view is updated
+             *
+             * Currently, only every third frame is updated.
+             *
+             * @type {number}
+             */
+            this.frameUpdateThreshold = 3;
+
+            /**
+             * Threshold at which animations get smoothed out (in milliseconds)
+             *
+             * @type {number}
+             */
+            this.smoothUpdateThreshold = 250;
+
+            this.on('rendered', '#main > .container', this.onRendered, this);
+        }
+
+        onRendered(event)
+        {
+            const _this = event.data.self;
+            const container = event.target;
+
+            container.querySelectorAll('[data-animate-progress]').forEach(progress => {
+                const frequency = (
+                    (Number(progress.dataset.endTime) - Number(progress.dataset.startTime)
+                ) * 1000) / progress.parentElement.offsetWidth;
+
+                _this.updateProgress(
+                    now => _this.animateProgress(progress, now), frequency);
+            });
+        }
+
+        animateProgress(progress, now)
+        {
+            if (! progress.isConnected) {
+                return false; // Exit early if the node is removed from the DOM
+            }
+
+            const durationScale = 100;
+
+            const startTime = Number(progress.dataset.startTime);
+            const endTime = Number(progress.dataset.endTime);
+            const duration = endTime - startTime;
+            const end = new Date(endTime * 1000.0);
+
+            let leftNow = durationScale * (1 - (end - now) / (duration * 1000.0));
+            if (leftNow > durationScale) {
+                leftNow = durationScale;
+            } else if (leftNow < 0) {
+                leftNow = 0;
+            }
+
+            const switchAfter = Number(progress.dataset.switchAfter);
+            if (! isNaN(switchAfter)) {
+                const switchClass = progress.dataset.switchClass;
+                const switchAt = new Date((startTime * 1000.0) + (switchAfter * 1000.0));
+                if (now < switchAt) {
+                    progress.classList.add(switchClass);
+                } else if (progress.classList.contains(switchClass)) {
+                    progress.classList.remove(switchClass);
+                }
+            }
+
+            const bar = progress.querySelector(':scope > .bar');
+            bar.style.width = leftNow + '%';
+
+            return leftNow !== durationScale;
+        }
+
+        updateProgress(callback, frequency, now = null)
+        {
+            if (now === null) {
+                now = new Date();
+            }
+
+            if (! callback(now)) {
+                return;
+            }
+
+            if (frequency < this.smoothUpdateThreshold) {
+                let counter = this.frameUpdateThreshold;
+                const onNextFrame = timeSinceOrigin => {
+                    if (--counter === 0) {
+                        this.updateProgress(callback, frequency, new Date(performance.timeOrigin + timeSinceOrigin));
+                    } else {
+                        requestAnimationFrame(onNextFrame);
+                    }
+                };
+                requestAnimationFrame(onNextFrame);
+            } else {
+                setTimeout(() => this.updateProgress(callback, frequency), frequency);
+            }
+        }
+    }
+
+    Icinga.Behaviors = Icinga.Behaviors || {};
+
+    Icinga.Behaviors.ProgressBar = ProgressBar;
+})(Icinga);