feat(documents): add inbox document preview modal

frontend/components/AuthenticatedFilePreview.client.vue

@@ -1,9 +1,10 @@
 <script setup lang="ts">
-import { onBeforeUnmount, ref, watch } from "vue"
+import { ref, watch } from "vue"
 
 const props = defineProps<{
   fileId: string
   path?: string | null
+  interactive?: boolean
 }>()
 
 const { $api } = useNuxtApp()
@@ -18,39 +19,47 @@ const revokeObjectUrl = () => {
   objectUrl.value = null
 }
 
-const loadFile = async () => {
+watch(() => props.fileId, async (fileId, _previous, onCleanup) => {
   revokeObjectUrl()
   loadFailed.value = false
+  let active = true
+  const controller = new AbortController()
+  onCleanup(() => {
+    active = false
+    controller.abort()
+    revokeObjectUrl()
+  })
 
   try {
-    const blob = await $api<Blob>(`/api/files/content/${encodeURIComponent(props.fileId)}`, {
-      responseType: "blob"
+    const blob = await $api<Blob>(`/api/files/content/${encodeURIComponent(fileId)}`, {
+      responseType: "blob",
+      signal: controller.signal,
     })
+    if (!active) return
     objectUrl.value = URL.createObjectURL(blob)
   } catch (error) {
+    if (!active) return
     loadFailed.value = true
     console.error("Dateivorschau konnte nicht geladen werden:", error)
   }
-}
-
-watch(() => props.fileId, loadFile, { immediate: true })
-onBeforeUnmount(revokeObjectUrl)
+}, { immediate: true })
 </script>
 
 <template>
-  <div class="authenticated-file-preview">
+  <div class="authenticated-file-preview" :class="{ 'is-interactive': interactive }">
     <iframe
-        v-if="objectUrl && isPdf"
-        :src="`${objectUrl}#toolbar=0&navpanes=0&scrollbar=0`"
+        v-if="objectUrl && isPdf && !loadFailed"
+        :src="interactive ? objectUrl : `${objectUrl}#toolbar=0&navpanes=0&scrollbar=0`"
         title="PDF-Vorschau"
         loading="lazy"
     />
-    <img v-else-if="objectUrl" :src="objectUrl" alt="Dateivorschau" />
-    <div v-else-if="loadFailed" class="preview-placeholder">
+    <img v-else-if="objectUrl && !loadFailed" :src="objectUrl" alt="Dateivorschau" @error="loadFailed = true" />
+    <div v-else-if="loadFailed" class="preview-placeholder" role="status">
       <UIcon name="i-heroicons-document" class="h-10 w-10" />
       <span>Keine Vorschau verfügbar</span>
+      <span v-if="interactive">Du kannst das Dokument herunterladen oder in einem neuen Tab öffnen.</span>
     </div>
-    <USkeleton v-else class="h-full min-h-32 w-full" />
+    <USkeleton v-else class="h-full min-h-32 w-full" aria-label="Dokumentvorschau wird geladen" />
   </div>
 </template>
 
@@ -67,6 +76,10 @@ onBeforeUnmount(revokeObjectUrl)
   pointer-events: none;
 }
 
+.authenticated-file-preview.is-interactive iframe {
+  pointer-events: auto;
+}
+
 .authenticated-file-preview img {
   object-fit: contain;
 }
@@ -80,5 +93,8 @@ onBeforeUnmount(revokeObjectUrl)
   gap: 0.5rem;
   color: rgb(107 114 128);
   font-size: 0.875rem;
+  height: 100%;
+  padding: 1rem;
+  text-align: center;
 }
 </style>

frontend/pages/organisation/dokumentenablage.vue

@@ -26,6 +26,8 @@ const password = ref("")
 const confirmReset = ref(false)
 const scannerPath = ref("/scanner-inbox/")
 const origin = ref("")
+const previewOpen = ref(false)
+const previewDocument = ref<InboxDocument | null>(null)
 const filingOpen = ref(false)
 const filingDocument = ref<InboxDocument | null>(null)
 const filingLoading = ref(false)
@@ -101,6 +103,18 @@ const load = async (silent = false) => {
   }
 }
 
+const openPreview = (entry: InboxDocument) => {
+  previewDocument.value = entry
+  previewOpen.value = true
+}
+
+const filePreviewDocument = () => {
+  const entry = previewDocument.value
+  if (!entry) return
+  previewOpen.value = false
+  openFiling(entry)
+}
+
 const openFiling = async (entry: InboxDocument) => {
   filingOpen.value = true
   filingDocument.value = entry
@@ -231,6 +245,9 @@ watch(search, () => {
 watch(setupOpen, open => {
   if (!open) { setupVersion++; password.value = ""; confirmReset.value = false }
 })
+watch(previewOpen, open => {
+  if (!open) previewDocument.value = null
+})
 watch(filingFolder, () => {
   const defaultType = selectedFolder.value?.standardFiletype
   if (defaultType) filingType.value = defaultType
@@ -250,6 +267,8 @@ watch(() => auth.activeTenant, () => {
   requestVersion++
   setupVersion++
   filingVersion++
+  previewOpen.value = false
+  previewDocument.value = null
   filingOpen.value = false
   clearTimeout(searchTimer)
   clearTimeout(pollTimer)
@@ -305,10 +324,10 @@ onBeforeUnmount(() => {
         </thead>
         <tbody class="divide-y divide-default">
           <tr v-for="entry in documents" :key="entry.id" class="hover:bg-elevated/30">
-            <td class="max-w-sm px-4 py-4"><button class="flex items-center gap-3 text-left font-medium text-highlighted hover:text-primary" @click="fileAction(entry, false)"><UIcon name="i-heroicons-document-text" class="h-5 w-5 shrink-0 text-muted" /><span class="break-all">{{ entry.name }}</span></button></td>
+            <td class="max-w-sm px-4 py-4"><button class="flex items-center gap-3 text-left font-medium text-highlighted hover:text-primary" :aria-label="`${entry.name} als Vorschau anzeigen`" @click="openPreview(entry)"><UIcon name="i-heroicons-document-text" class="h-5 w-5 shrink-0 text-muted" /><span class="break-all">{{ entry.name }}</span></button></td>
             <td class="whitespace-nowrap px-4 py-4 text-muted">{{ dayjs(entry.receivedAt).format('DD.MM.YYYY HH:mm') }}</td>
             <td class="whitespace-nowrap px-4 py-4 text-muted">{{ formatSize(entry.size) }}</td>
-            <td class="px-4 py-4"><div class="flex justify-end gap-1"><UButton icon="i-heroicons-folder-arrow-down" variant="soft" :aria-label="`${entry.name} ablegen`" @click="openFiling(entry)">Ablegen</UButton><UButton icon="i-heroicons-arrow-top-right-on-square" color="neutral" variant="ghost" :aria-label="`${entry.name} öffnen`" @click="fileAction(entry, false)" /><UButton icon="i-heroicons-arrow-down-tray" color="neutral" variant="ghost" :aria-label="`${entry.name} herunterladen`" @click="fileAction(entry, true)" /></div></td>
+            <td class="px-4 py-4"><div class="flex justify-end gap-1"><UButton icon="i-heroicons-folder-arrow-down" variant="soft" :aria-label="`${entry.name} ablegen`" @click="openFiling(entry)">Ablegen</UButton><UButton icon="i-heroicons-eye" color="neutral" variant="ghost" :aria-label="`${entry.name} als Vorschau anzeigen`" @click="openPreview(entry)">Vorschau</UButton><UButton icon="i-heroicons-arrow-down-tray" color="neutral" variant="ghost" :aria-label="`${entry.name} herunterladen`" @click="fileAction(entry, true)" /></div></td>
           </tr>
         </tbody>
       </table>
@@ -323,12 +342,31 @@ onBeforeUnmount(() => {
     </div>
   </UDashboardPanelContent>
 
+  <UModal v-model:open="previewOpen" :title="previewDocument?.name || 'Dokumentvorschau'" description="Vorschau des eingegangenen Dokuments" :ui="{ content: 'w-[calc(100vw-2rem)] max-w-6xl h-[90dvh]', body: 'min-h-0 flex-1 overflow-hidden p-0 sm:p-0', title: 'break-all pr-8', footer: 'flex-wrap justify-end' }">
+    <template #body>
+      <AuthenticatedFilePreview
+          v-if="previewOpen && previewDocument"
+          :key="previewDocument.id"
+          :file-id="previewDocument.id"
+          :path="previewDocument.name"
+          interactive
+      />
+    </template>
+    <template #footer>
+      <template v-if="previewDocument">
+        <UButton icon="i-heroicons-arrow-top-right-on-square" color="neutral" variant="ghost" @click="fileAction(previewDocument, false)">In neuem Tab öffnen</UButton>
+        <UButton icon="i-heroicons-arrow-down-tray" color="neutral" variant="outline" @click="fileAction(previewDocument, true)">Herunterladen</UButton>
+        <UButton v-if="!filingOpen" icon="i-heroicons-folder-arrow-down" @click="filePreviewDocument">In Dateien ablegen</UButton>
+      </template>
+    </template>
+  </UModal>
+
   <UModal v-model:open="filingOpen" title="In Dateien ablegen" description="Wähle den Zielordner und klassifiziere das Dokument." :dismissible="!filingSaving" :close="!filingSaving">
     <template #body>
       <form class="space-y-5" @submit.prevent="fileDocument">
         <div v-if="filingDocument" class="flex items-center justify-between gap-3 rounded-lg bg-elevated/50 p-3">
           <span class="break-all text-sm font-medium">{{ filingDocument.name }}</span>
-          <UButton icon="i-heroicons-arrow-top-right-on-square" color="neutral" variant="ghost" aria-label="Dokument öffnen" @click="fileAction(filingDocument, false)" />
+          <UButton icon="i-heroicons-eye" color="neutral" variant="ghost" aria-label="Dokumentvorschau öffnen" @click="openPreview(filingDocument)" />
         </div>
         <UAlert v-if="filingError" :title="filingError" color="error" variant="subtle" />
         <USkeleton v-if="filingLoading" class="h-32 w-full" />