feat(chat): replace the attachment menu with a media bottom sheet

app/build.gradle.kts

@@ -41,6 +41,7 @@ val androidxTestVersion = "1.5.0"
 val media3Version = "1.11.0"
 val coroutinesVersion = "1.11.0"
 val mockitoKotlinVersion = "6.3.0"
+val cameraXVersion = "1.6.1"
 
 android {
     compileSdk = 37
@@ -244,6 +245,12 @@ dependencies {
     implementation("androidx.lifecycle:lifecycle-common:$lifecycleVersion")
     implementation("androidx.lifecycle:lifecycle-viewmodel-compose:$lifecycleVersion")
 
+    implementation("androidx.camera:camera-core:$cameraXVersion")
+    implementation("androidx.camera:camera-camera2:$cameraXVersion")
+    implementation("androidx.camera:camera-lifecycle:$cameraXVersion")
+    implementation("androidx.camera:camera-video:$cameraXVersion")
+    implementation("androidx.camera:camera-view:$cameraXVersion")
+
     implementation("androidx.biometric:biometric:1.1.0")
 
     implementation("io.reactivex.rxjava2:rxandroid:2.1.1")

app/src/main/AndroidManifest.xml

@@ -65,6 +65,7 @@
         android:maxSdkVersion="32" />
     <uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
     <uses-permission android:name="android.permission.READ_MEDIA_VIDEO" />
+    <uses-permission android:name="android.permission.READ_MEDIA_VISUAL_USER_SELECTED" />
     <uses-permission android:name="android.permission.READ_MEDIA_AUDIO" />
 
     <uses-permission android:name="android.permission.WAKE_LOCK" />

app/src/main/java/com/nextcloud/talk/attachmentsheet/AttachmentAction.kt

@@ -0,0 +1,56 @@
+/*
+ * Nextcloud Talk - Android Client
+ *
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.nextcloud.talk.attachmentsheet
+
+/**
+ * Entries of the attachment sheet that open another screen or flow. The declaration order is the display order.
+ */
+enum class AttachmentAction {
+    PICTURE_FROM_CAM,
+    VIDEO_FROM_CAM,
+    GALLERY,
+    FILE_FROM_LOCAL,
+    FILE_FROM_CLOUD,
+    CREATE_THREAD,
+    CREATE_POLL,
+    SHARE_LOCATION,
+    SHARE_CONTACT
+}
+
+data class AttachmentVisibilityInput(
+    val isRemoteConversation: Boolean,
+    val hasGeoLocationCapability: Boolean,
+    val hasPollsCapability: Boolean,
+    val isOneToOneConversation: Boolean,
+    val hasThreadsCapability: Boolean,
+    val isInsideThread: Boolean,
+    val hasCamera: Boolean
+)
+
+/**
+ * Decides which entries are offered. Federated conversations only allow the gallery, polls and threads; the video
+ * entry additionally needs camera hardware.
+ */
+fun resolveAttachmentActions(input: AttachmentVisibilityInput): List<AttachmentAction> =
+    AttachmentAction.entries.filter { action ->
+        when (action) {
+            AttachmentAction.PICTURE_FROM_CAM,
+            AttachmentAction.FILE_FROM_LOCAL,
+            AttachmentAction.FILE_FROM_CLOUD,
+            AttachmentAction.SHARE_CONTACT -> !input.isRemoteConversation
+
+            AttachmentAction.VIDEO_FROM_CAM -> !input.isRemoteConversation && input.hasCamera
+
+            AttachmentAction.GALLERY -> true
+
+            AttachmentAction.SHARE_LOCATION -> !input.isRemoteConversation && input.hasGeoLocationCapability
+
+            AttachmentAction.CREATE_POLL -> input.hasPollsCapability && !input.isOneToOneConversation
+
+            AttachmentAction.CREATE_THREAD -> input.hasThreadsCapability && !input.isInsideThread
+        }
+    }

app/src/main/java/com/nextcloud/talk/attachmentsheet/AttachmentActionResources.kt

@@ -0,0 +1,42 @@
+/*
+ * Nextcloud Talk - Android Client
+ *
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.nextcloud.talk.attachmentsheet
+
+import androidx.annotation.DrawableRes
+import androidx.annotation.StringRes
+import com.nextcloud.talk.R
+
+@DrawableRes
+internal fun AttachmentAction.iconRes(): Int =
+    when (this) {
+        AttachmentAction.PICTURE_FROM_CAM -> R.drawable.ic_baseline_photo_camera_24
+        AttachmentAction.VIDEO_FROM_CAM -> R.drawable.ic_baseline_videocam_24
+        AttachmentAction.GALLERY -> R.drawable.baseline_photo_library_24
+        AttachmentAction.FILE_FROM_LOCAL -> R.drawable.upload
+        AttachmentAction.FILE_FROM_CLOUD -> R.drawable.ic_share_variant
+        AttachmentAction.CREATE_THREAD -> R.drawable.outline_forum_24
+        AttachmentAction.CREATE_POLL -> R.drawable.ic_baseline_bar_chart_24
+        AttachmentAction.SHARE_LOCATION -> R.drawable.ic_baseline_location_on_24
+        AttachmentAction.SHARE_CONTACT -> R.drawable.ic_baseline_person_24
+    }
+
+/**
+ * Label for the entry, or null when it needs a runtime argument (the cloud entry carries the server name).
+ */
+@StringRes
+internal fun AttachmentAction.labelRes(): Int? =
+    when (this) {
+        AttachmentAction.PICTURE_FROM_CAM -> R.string.nc_upload_picture_from_cam
+        AttachmentAction.VIDEO_FROM_CAM -> R.string.nc_upload_video_from_cam
+        AttachmentAction.GALLERY -> R.string.nc_gallery
+        AttachmentAction.FILE_FROM_LOCAL -> R.string.nc_upload_from_device
+        AttachmentAction.FILE_FROM_CLOUD -> null
+        AttachmentAction.CREATE_THREAD -> R.string.start_thread
+        AttachmentAction.CREATE_POLL -> R.string.nc_create_poll
+        AttachmentAction.SHARE_LOCATION -> R.string.nc_share_location
+        AttachmentAction.SHARE_CONTACT -> R.string.nc_share_contact
+    }