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function addEventListener(elements, events, handler) {\n    _addOrRemoveListener('add', elements, events, handler);\n}\n\nexport function removeEventListener(elements, events, handler) {\n    _addOrRemoveListener('remove', elements, events, handler);\n}\n\nexport function _addOrRemoveListener(action, elements, events, handler) {\n    const eventsArray = events.split(' ');\n\n    for (let i = 0; i < elements.length; i++) {\n        const element = elements[i];\n\n        for (let j = 0; j < eventsArray.length; j++) {\n            const event = eventsArray[j];\n\n            if (action === 'add') {\n                element.addEventListener(event, handler);\n            } else {\n                element.removeEventListener(event, handler);\n            }\n        }\n    }\n}\n","// See: https://developer.mozilla.org/en-US/docs/Web/API/Background_Tasks_API#Concepts_and_usage -> Falling back to setTimeout\n\nexport function init() {\n    if (!window.requestIdleCallback) {\n        window.requestIdleCallback =\n            window.requestIdleCallback ||\n            function (handler) {\n                const startTime = Date.now();\n\n                return setTimeout(function () {\n                    handler({\n                        didTimeout: false,\n                        timeRemaining: function () {\n                            return Math.max(0, 50.0 - (Date.now() - startTime));\n                        }\n                    });\n                }, 1) as unknown as number;\n            };\n    }\n\n    if (!window.cancelIdleCallback) {\n        window.cancelIdleCallback =\n            window.cancelIdleCallback ||\n            function (id) {\n                clearTimeout(id);\n            };\n    }\n}\n","export const onArrayPush = <T>(target: T[], callback: (added: T[]) => void) => {\n    target.push = (...items: T[]) => {\n        const res = Array.prototype.push.call(target, ...items);\n        callback(items);\n        return res;\n    };\n};\n","import type { DataLayerItemWidget, WoDataLayerItem } from '../@types/WoDataLayer';\nimport { onArrayPush } from './array';\n\nexport function pushDataLayerItem(item: WoDataLayerItem) {\n    window.woDataLayer = window.woDataLayer || [];\n    window.woDataLayer.push(item);\n}\n\nexport function pushDataLayerItemWidget(item: DataLayerItemWidget) {\n    pushDataLayerItem(item);\n}\n\nfunction getWidgetType() {\n    const pathName = window.location.pathname;\n    const matches = /^\\/widgets\\/(\\w+)([/|?].+)?/i.exec(pathName);\n    return matches ? matches[1] : undefined;\n}\n\nexport function initDataLayer() {\n    window.woDataLayer = window.woDataLayer ?? [];\n\n    // Set default values, reset unused (not explicitly set) parameters\n    onArrayPush(window.woDataLayer, items => {\n        for (let index = 0; index < items.length; index++) {\n            const item = items[index];\n            item['duration'] ??= undefined;\n            item['error'] ??= undefined;\n            item['widget_type'] ??= undefined;\n            item['widget_placement'] ??= undefined;\n\n            item['widget_type'] ??= getWidgetType();\n        }\n    });\n}\n","import '../../Shared/js/polyfills';\n\nimport { onArrayPush } from '../../Shared/js/utils/array';\nimport { pushDataLayerItemWidget } from '../../Shared/js/utils/datalayer';\nimport * as EventHelper from './common/utils/EventHelper';\nimport * as ViewportHelper from './common/utils/ViewportHelper';\n\nconst createController = function () {\n    return {\n        getContainer: function () {\n            let container;\n\n            if (this.args.containerId === '') {\n                container = this.findScript();\n            } else {\n                container = document.getElementById(this.args.containerId);\n            }\n\n            if (!container) {\n                throw new Error('Container not found!');\n            }\n\n            return container;\n        },\n\n        uuid: function () {\n            return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {\n                const r = (Math.random() * 16) | 0,\n                    v = c === 'x' ? r : (r & 0x3) | 0x8;\n                return v.toString(16);\n            });\n        },\n\n        findScript: function () {\n            const url = this.args.scriptUrl.replace(/&amp;/g, '&');\n            const urlParts = url.split('?');\n            const paramsMatch = this.paramsMatch.bind(this);\n\n            for (let i = 0; i < document.scripts.length; i++) {\n                const src = document.scripts[i].src.replace(/&amp;/g, '&');\n                const srcParts = src.split('?');\n\n                if (urlParts.length === srcParts.length && urlParts[0] === srcParts[0]) {\n                    if (urlParts.length === 1) {\n                        return document.scripts[i];\n                    }\n                    if (paramsMatch(urlParts[1].split('&'), srcParts[1].split('&'))) {\n                        return document.scripts[i];\n                    }\n                }\n            }\n            return null;\n        },\n\n        // TODO: Use Lodash\n        paramsMatch: function (urlParams: unknown[], srcParams: unknown[]) {\n            if (urlParams.length !== srcParams.length) return false;\n            const inArray = this.inArray;\n            for (let x = 0; x < urlParams.length; x++) {\n                if (!inArray(urlParams[x], srcParams)) {\n                    return false;\n                }\n            }\n            return true;\n        },\n\n        // TODO: Use Lodash\n        inArray: function (value: string, array: string[]) {\n            for (let x = 0; x < array.length; x++) {\n                if (value.toLowerCase() === array[x].toLowerCase()) {\n                    return true;\n                }\n            }\n            return false;\n        },\n\n        appendQuery: function (url: string, query: string) {\n            if (url.indexOf('?') === -1) {\n                return url + '?' + query;\n            }\n            return url + '&' + query;\n        },\n\n        addDataAttribute: function (frame: HTMLIFrameElement, name: string) {\n            const container = this.getContainer();\n            const value = container.getAttribute('data-' + name);\n            if (value) {\n                frame.src = this.appendQuery(frame.src, name + '=' + encodeURIComponent(value));\n            }\n        },\n\n        onLoad: function () {\n            const container = this.getContainer();\n            if (!container) {\n                return;\n            }\n\n            const parent = this.getParentContainer(container);\n            if (ViewportHelper.isInViewport(parent)) {\n                this.loadWidget();\n                return;\n            }\n\n            this.onScrollHandler = this.onScroll.bind(this);\n\n            const options = <IntersectionObserverInit>{\n                root: null, // viewport\n                threshold: 0.1\n            };\n\n            this.observer = new IntersectionObserver(this.onScrollHandler, options);\n            this.observer.observe(parent);\n        },\n\n        getParentContainer(el: HTMLElement) {\n            const parent = el.parentElement;\n            if (!parent) {\n                return el;\n            }\n\n            if (parent.clientHeight === 0) {\n                return this.getParentContainer(parent);\n            }\n\n            return parent;\n        },\n\n        onScroll: function (entries: IntersectionObserverEntry[]) {\n            if (this.loadTriggered) {\n                return;\n            }\n\n            for (let i = 0; i < entries.length; i++) {\n                const entry = entries[i];\n                if (entry.isIntersecting) {\n                    this.observer.disconnect();\n                    this.loadWidget();\n                    return;\n                }\n            }\n        },\n\n        loadWidget: function () {\n            this.loadTriggered = true;\n\n            const container = this.getContainer();\n\n            const startTime = Date.now();\n            pushDataLayerItemWidget({\n                event: 'widget_preload_begin',\n                widget_placement: 'iframe'\n            });\n\n            const location = this.getLocation(container);\n\n            console.debug({\n                'wo->_loadWidget': this.args.frameSource,\n                location: location\n            });\n\n            const frame = document.createElement('iframe');\n            frame.id = this.uid;\n\n            const referrer = `_r=${encodeURIComponent(location)}`;\n            frame.src = this.appendQuery(this.args.frameSource, referrer);\n\n            frame.setAttribute('width', '100%');\n            frame.setAttribute('scrolling', 'no');\n            frame.setAttribute('frameborder', '0');\n            frame.setAttribute('seamless', 'seamless');\n            frame.setAttribute('allowtransparency', 'true');\n            frame.style.height = this.args.isCta ? '34px' : '260px';\n\n            if (this.args.allowFullscreen) {\n                frame.setAttribute('allowfullscreen', '');\n            }\n\n            this.addDataAttribute(frame, 'query');\n\n            const parentNode = container.parentNode;\n            parentNode.replaceChild(frame, container);\n\n            frame.onload = () => {\n                const onMessage = (event: Event) => {\n                    this.resize(frame, event);\n                };\n\n                EventHelper.addEventListener([window], 'message', onMessage);\n\n                const endTime = Date.now();\n                pushDataLayerItemWidget({\n                    event: 'widget_preload_end',\n                    widget_placement: 'iframe',\n                    duration: (endTime - startTime) / 1000\n                });\n            };\n        },\n\n        getLocation(el: HTMLElement) {\n            const defaultLocation = window.top.location.href;\n\n            // TODO: Support list of attributes for different website implementations\n            const key = 'data-article-permalink';\n            const article = el.closest(`[${key}]`);\n            if (!article) {\n                return defaultLocation;\n            }\n\n            const permalink = article.getAttribute(key);\n            return permalink || defaultLocation;\n        },\n\n        resize: function (frame: HTMLIFrameElement, event: Event) {\n            const callback = () => this._resize(frame, event);\n            requestIdleCallback(callback, { timeout: 500 });\n        },\n\n        _resize: function (frame: HTMLIFrameElement, event: Event & { data: ResizeEventArgs; source: unknown }) {\n            const newSize = `${event.data.height}px`;\n\n            if (\n                event.data &&\n                event.data.height &&\n                Object.prototype.hasOwnProperty.call(event.data, 'sentinel') &&\n                event.data.sentinel === 'whistleout-widget' &&\n                event.data.url === frame.src &&\n                event.source === frame.contentWindow &&\n                frame.style.height !== newSize\n            ) {\n                console.debug(`Resizing widget: ${frame.style.height}->${newSize}`, new URL(event.data.url));\n                frame.style.height = newSize;\n            }\n        },\n\n        init: function (args: ApiParams) {\n            this.args = args;\n            this.uid = this.uuid();\n\n            this.loadTriggered = false;\n            this.loadWidgetTaskId = null;\n            this.resizeTaskId = null;\n\n            pushDataLayerItemWidget({\n                event: 'widget_preload_init',\n                widget_placement: 'iframe'\n            });\n\n            this.onLoad();\n        }\n    };\n};\n\nconst supportedAPI = ['show'];\n\nfunction apiHandler(api: string, params: ApiParams) {\n    if (!api) {\n        throw Error('API method required');\n    }\n\n    api = api.toLowerCase();\n    if (supportedAPI.indexOf(api) === -1) {\n        throw Error(`Method ${api} is not supported`);\n    }\n\n    console.debug(`Handling API call ${api}`, params);\n\n    const controller = createController();\n    switch (api) {\n        case 'show':\n            controller.init(params);\n            break;\n        default:\n            console.warn(`No handler defined for ${api}`);\n    }\n}\n\n// Based on: https://blog.jenyay.com/building-javascript-widget/\nfunction processQueue(queue: ApiQueueItem[]) {\n    console.debug('Processing widget preload queue...');\n\n    if (!queue) {\n        console.debug('Processing widget preload queue: empty queue. SKIP');\n        return;\n    }\n\n    for (let i = 0; i < queue.length; i++) {\n        const queueItem = queue[i];\n        if (queueItem.isProcessed) {\n            continue;\n        }\n\n        console.debug(`Processing widget preload queue, item ${i}...: ${queueItem[0]}`, queueItem);\n        apiHandler(queueItem[0], queueItem[1]);\n\n        // TODO: Consider removing processed items for better performance\n        queueItem.isProcessed = true;\n\n        console.debug(`Processing widget preload queue, item ${i}... DONE`);\n    }\n\n    console.debug('Processing widget preload queue... DONE');\n}\n\nfunction main() {\n    const queue = window['wo-widget'].pq;\n    onArrayPush(queue, added => {\n        processQueue(added);\n    });\n\n    processQueue(queue);\n}\n\nmain();\n","export function isInViewport(el: HTMLElement) {\n    if (window.getComputedStyle(el).display === 'none') {\n        return false;\n    }\n\n    // See: https://developer.mozilla.org/en-US/docs/Web/API/Element/getBoundingClientRect\n    // Based on: https://github.com/Emmaccen/isElementInView/blob/main/view.js\n\n    const rect = el.getBoundingClientRect();\n    const viewportHeight = window.innerHeight || document.documentElement.clientHeight;\n    return rect.bottom > 0 && rect.top >= 0 && rect.top <= viewportHeight;\n}\n"],"names":["addEventListener","elements","events","handler","action","eventsArray","split","i","length","element","j","event","_addOrRemoveListener","window","requestIdleCallback","startTime","Date","now","setTimeout","didTimeout","timeRemaining","Math","max","cancelIdleCallback","id","clearTimeout","onArrayPush","target","callback","push","items","res","Array","prototype","call","pushDataLayerItem","item","woDataLayer","pushDataLayerItemWidget","getWidgetType","pathName","location","pathname","matches","exec","undefined","initDataLayer","o","index","supportedAPI","apiHandler","api","params","Error","toLowerCase","indexOf","getContainer","container","this","args","containerId","findScript","document","getElementById","uuid","replace","c","r","random","toString","urlParts","scriptUrl","paramsMatch","bind","scripts","srcParts","src","urlParams","srcParams","inArray","x","value","array","appendQuery","url","query","addDataAttribute","frame","name","getAttribute","encodeURIComponent","onLoad","parent","getParentContainer","loadWidget","onScrollHandler","onScroll","observer","IntersectionObserver","root","threshold","observe","el","parentElement","clientHeight","entries","loadTriggered","isIntersecting","disconnect","widget_placement","getLocation","createElement","uid","referrer","frameSource","setAttribute","style","height","isCta","allowFullscreen","parentNode","replaceChild","onload","resize","endTime","duration","defaultLocation","top","href","key","article","closest","_resize","timeout","newSize","data","Object","hasOwnProperty","sentinel","source","contentWindow","init","loadWidgetTaskId","resizeTaskId","processQueue","queue","queueItem","isProcessed","pq","added","main","isInViewport","getComputedStyle","display","rect","getBoundingClientRect","viewportHeight","innerHeight","documentElement","bottom"],"sourceRoot":""}