Kundenansicht im Dashboard: Kennung bei jeder Anfrage, Banner mit Beenden, Hinweis bei ersetzter oder abgelaufener Ansicht
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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/* Kundenansicht (Mitarbeiter oeffnet das Portal eines Kunden aus dem Ticketsystem).
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Ein Browser haelt nur eine Portal-Sitzung: oeffnet jemand Kunde B, waehrend Kunde A noch in einem Tab offen ist,
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darf der Tab von A keine Daten von B laden. Deshalb traegt jede eigene /api-Anfrage die Kennung der Ansicht
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(X-Kundenansicht); der Server antwortet bei fremder Kennung mit 409 view_replaced, nach 2 Stunden mit
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401 view_expired. Dann zeigt dieses Skript nur noch einen Hinweis. Klassisches Skript, vor app.js laden. */
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(function () {
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'use strict'
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const HEADER = 'X-Kundenansicht'
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let viewId = ''
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function isOwnApi(url) {
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try {
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const u = new URL(String(url), window.location.href)
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return u.origin === window.location.origin && u.pathname.startsWith('/api/')
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} catch {
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return false
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}
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}
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function overlay(text) {
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const existing = document.getElementById('kb-view-overlay-text')
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if (existing) {
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existing.textContent = text
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return
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}
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const box = document.createElement('div')
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box.id = 'kb-view-overlay'
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box.className = 'kb-view-overlay'
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box.setAttribute('role', 'alertdialog')
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box.setAttribute('aria-modal', 'true')
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const card = document.createElement('div')
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card.className = 'kb-view-overlay-card'
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const p = document.createElement('p')
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p.id = 'kb-view-overlay-text'
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p.textContent = text
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const button = document.createElement('button')
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button.type = 'button'
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button.textContent = 'Tab schließen'
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button.addEventListener('click', () => window.close())
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card.appendChild(p)
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card.appendChild(button)
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box.appendChild(card)
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document.body.appendChild(box)
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}
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function showReplaced(kunde) {
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overlay(`Diese Ansicht wurde durch die Kundenansicht von ${kunde || 'einem anderen Kunden'} ersetzt.`)
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}
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function showExpired() {
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overlay('Die Kundenansicht ist abgelaufen. Bitte im Ticketsystem erneut öffnen.')
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}
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function inspect(status, body) {
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if (status === 409 && body && body.code === 'view_replaced') showReplaced(body.kunde)
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else if (status === 401 && body && body.code === 'view_expired') showExpired()
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}
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const originalFetch = window.fetch.bind(window)
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window.fetch = async function (input, init) {
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const url = typeof input === 'string' ? input : (input && input.url) || String(input)
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const own = isOwnApi(url)
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let options = init || {}
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if (viewId && own) {
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const headers = new Headers(options.headers || (typeof input !== 'string' && input && input.headers) || {})
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headers.set(HEADER, viewId)
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options = { ...options, headers }
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}
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const response = await originalFetch(input, options)
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if (own && (response.status === 409 || response.status === 401)) {
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response.clone().json().then((body) => inspect(response.status, body)).catch(() => {})
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}
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return response
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}
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if (window.XMLHttpRequest) {
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const proto = window.XMLHttpRequest.prototype
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const open = proto.open
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const send = proto.send
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proto.open = function (method, url, ...rest) {
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this.kbOwnApi = isOwnApi(url)
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return open.call(this, method, url, ...rest)
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}
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proto.send = function (...args) {
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if (this.kbOwnApi) {
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if (viewId) this.setRequestHeader(HEADER, viewId)
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this.addEventListener('load', () => {
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if (this.status !== 409 && this.status !== 401) return
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try {
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inspect(this.status, JSON.parse(this.responseText))
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} catch {
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/* keine JSON-Antwort */
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}
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})
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}
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return send.apply(this, args)
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}
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}
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window.KbView = {
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setId(id) {
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viewId = String(id || '')
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},
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id: () => viewId,
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showReplaced,
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showExpired,
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}
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})()
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