From 4f27c0bb257d1142f9a319381c01388a0e8ff1ab Mon Sep 17 00:00:00 2001
From: skjnldsv <skjnldsv@protonmail.com>
Date: Thu, 14 Mar 2024 08:56:52 +0100
Subject: [PATCH] fix(files): breadcrumbs dnd

Signed-off-by: skjnldsv <skjnldsv@protonmail.com>
---
 apps/files/src/components/BreadCrumbs.vue   | 80 ++++++++++++++++++++-
 apps/files/src/components/FileEntryMixin.ts | 71 ++++--------------
 apps/files/src/services/DropService.ts      | 75 ++++++++++++++++++-
 3 files changed, 167 insertions(+), 59 deletions(-)

diff --git a/apps/files/src/components/BreadCrumbs.vue b/apps/files/src/components/BreadCrumbs.vue
index 5e4188370c4..dd59b8332ee 100644
--- a/apps/files/src/components/BreadCrumbs.vue
+++ b/apps/files/src/components/BreadCrumbs.vue
@@ -11,7 +11,9 @@
 			:force-icon-text="true"
 			:title="titleForSection(index, section)"
 			:aria-description="ariaForSection(section)"
-			@click.native="onClick(section.to)">
+			@click.native="onClick(section.to)"
+			@dragover.native="onDragOver($event, section.dir)"
+			@dropped="onDrop($event, section.dir)">
 			<template v-if="index === 0" #icon>
 				<NcIconSvgWrapper :size="20"
 					:svg="viewIcon" />
@@ -34,6 +36,9 @@ import NcBreadcrumbs from '@nextcloud/vue/dist/Components/NcBreadcrumbs.js'
 import NcIconSvgWrapper from '@nextcloud/vue/dist/Components/NcIconSvgWrapper.js'
 import Vue from 'vue'
 
+import { onDropExternalFiles, onDropInternalFiles } from '../services/DropService'
+import { showError } from '@nextcloud/dialogs'
+import { useDragAndDropStore } from '../store/dragging.ts'
 import { useFilesStore } from '../store/files.ts'
 import { usePathsStore } from '../store/paths.ts'
 
@@ -46,6 +51,10 @@ export default Vue.extend({
 		NcIconSvgWrapper,
 	},
 
+	mixins: [
+		filesListWidthMixin,
+	],
+
 	props: {
 		path: {
 			type: String,
@@ -54,9 +63,11 @@ export default Vue.extend({
 	},
 
 	setup() {
+		const draggingStore = useDragAndDropStore()
 		const filesStore = useFilesStore()
 		const pathsStore = usePathsStore()
 		return {
+			draggingStore,
 			filesStore,
 			pathsStore,
 		}
@@ -84,6 +95,8 @@ export default Vue.extend({
 					exact: true,
 					name: this.getDirDisplayName(dir),
 					to,
+					// disable drop on current directory
+					disableDrop: index === this.dirs.length - 1,
 				}
 			})
 		},
@@ -117,6 +130,71 @@ export default Vue.extend({
 			}
 		},
 
+		onDragOver(event: DragEvent, path: string) {
+			// Cannot drop on the current directory
+			if (path === this.dirs[this.dirs.length - 1]) {
+				event.dataTransfer.dropEffect = 'none'
+				return
+			}
+
+			// Handle copy/move drag and drop
+			if (event.ctrlKey) {
+				event.dataTransfer.dropEffect = 'copy'
+			} else {
+				event.dataTransfer.dropEffect = 'move'
+			}
+		},
+
+		async onDrop(event: DragEvent, path: string) {
+			// skip if native drop like text drag and drop from files names
+			if (!this.draggingFiles && !event.dataTransfer?.files?.length) {
+				return
+			}
+
+			// Caching the selection
+			const selection = this.draggingFiles
+			const files = event.dataTransfer?.files || new FileList()
+
+			event.preventDefault()
+			event.stopPropagation()
+
+			// We might not have the target directory fetched yet
+			const contents = await this.currentView?.getContents(path)
+			const folder = contents?.folder
+			if (!folder) {
+				showError(this.t('files', 'Target folder does not exist any more'))
+				return
+			}
+
+			const canDrop = (folder.permissions & Permission.CREATE) !== 0
+			const isCopy = event.ctrlKey
+
+			// If another button is pressed, cancel it. This
+			// allows cancelling the drag with the right click.
+			if (!canDrop || event.button !== 0) {
+				return
+			}
+
+			logger.debug('Dropped', { event, folder, selection })
+
+			// Check whether we're uploading files
+			if (files.length > 0) {
+				await onDropExternalFiles(folder, files)
+				return
+			}
+
+			// Else we're moving/copying files
+			const nodes = selection.map(fileid => this.filesStore.getNode(fileid)) as Node[]
+			await onDropInternalFiles(folder, nodes, isCopy)
+
+			// Reset selection after we dropped the files
+			// if the dropped files are within the selection
+			if (selection.some(fileid => this.selectedFiles.includes(fileid))) {
+				logger.debug('Dropped selection, resetting select store...')
+				this.selectionStore.reset()
+			}
+		},
+
 		titleForSection(index, section) {
 			if (section?.to?.query?.dir === this.$route.query.dir) {
 				return t('files', 'Reload current directory')
diff --git a/apps/files/src/components/FileEntryMixin.ts b/apps/files/src/components/FileEntryMixin.ts
index a1e90121c92..93d188b67d9 100644
--- a/apps/files/src/components/FileEntryMixin.ts
+++ b/apps/files/src/components/FileEntryMixin.ts
@@ -22,20 +22,17 @@
 
 import type { PropType } from 'vue'
 
-import { extname, join } from 'path'
+import { extname } from 'path'
 import { FileType, Permission, Folder, File as NcFile, NodeStatus, Node, View } from '@nextcloud/files'
 import { generateUrl } from '@nextcloud/router'
-import { showError, showSuccess } from '@nextcloud/dialogs'
 import { translate as t } from '@nextcloud/l10n'
-import { Upload, getUploader } from '@nextcloud/upload'
 import { vOnClickOutside } from '@vueuse/components'
 import Vue, { defineComponent } from 'vue'
 
 import { action as sidebarAction } from '../actions/sidebarAction.ts'
 import { getDragAndDropPreview } from '../utils/dragUtils.ts'
-import { handleCopyMoveNodeTo } from '../actions/moveOrCopyAction.ts'
 import { hashCode } from '../utils/hashUtils.ts'
-import { MoveCopyAction } from '../actions/moveOrCopyActionUtils.ts'
+import { onDropExternalFiles, onDropInternalFiles } from '../services/DropService.ts'
 import logger from '../logger.js'
 
 Vue.directive('onClickOutside', vOnClickOutside)
@@ -310,11 +307,15 @@ export default defineComponent({
 				return
 			}
 
+			// Caching the selection
+			const selection = this.draggingFiles
+			const files = event.dataTransfer?.files || new FileList()
+
 			event.preventDefault()
 			event.stopPropagation()
 
-			// If another button is pressed, cancel it
-			// This allows cancelling the drag with the right click
+			// If another button is pressed, cancel it. This
+			// allows cancelling the drag with the right click.
 			if (!this.canDrop || event.button !== 0) {
 				return
 			}
@@ -322,63 +323,21 @@ export default defineComponent({
 			const isCopy = event.ctrlKey
 			this.dragover = false
 
-			logger.debug('Dropped', { event, selection: this.draggingFiles })
+			logger.debug('Dropped', { event, selection })
 
 			// Check whether we're uploading files
-			if (event.dataTransfer?.files
-				&& event.dataTransfer.files.length > 0) {
-				const uploader = getUploader()
-
-				// Check whether the uploader is in the same folder
-				// This should never happen™
-				if (!uploader.destination.path.startsWith(uploader.destination.path)) {
-					logger.error('The current uploader destination is not the same as the current folder')
-					showError(t('files', 'An error occurred while uploading. Please try again later.'))
-					return
-				}
-
-				logger.debug(`Uploading files to ${this.source.path}`)
-				const queue = [] as Promise<Upload>[]
-				for (const file of event.dataTransfer.files) {
-					// Because the uploader destination is properly set to the current folder
-					// we can just use the basename as the relative path.
-					queue.push(uploader.upload(join(this.source.basename, file.name), file))
-				}
-
-				const results = await Promise.allSettled(queue)
-				const errors = results.filter(result => result.status === 'rejected')
-				if (errors.length > 0) {
-					logger.error('Error while uploading files', { errors })
-					showError(t('files', 'Some files could not be uploaded'))
-					return
-				}
-
-				logger.debug('Files uploaded successfully')
-				showSuccess(t('files', 'Files uploaded successfully'))
+			if (files.length > 0) {
+				await onDropExternalFiles(this.source as Folder, files)
 				return
 			}
 
-			const nodes = this.draggingFiles.map(fileid => this.filesStore.getNode(fileid)) as Node[]
-			nodes.forEach(async (node: Node) => {
-				Vue.set(node, 'status', NodeStatus.LOADING)
-				try {
-					// TODO: resolve potential conflicts prior and force overwrite
-					await handleCopyMoveNodeTo(node, this.source, isCopy ? MoveCopyAction.COPY : MoveCopyAction.MOVE)
-				} catch (error) {
-					logger.error('Error while moving file', { error })
-					if (isCopy) {
-						showError(t('files', 'Could not copy {file}. {message}', { file: node.basename, message: error.message || '' }))
-					} else {
-						showError(t('files', 'Could not move {file}. {message}', { file: node.basename, message: error.message || '' }))
-					}
-				} finally {
-					Vue.set(node, 'status', undefined)
-				}
-			})
+			// Else we're moving/copying files
+			const nodes = selection.map(fileid => this.filesStore.getNode(fileid)) as Node[]
+			await onDropInternalFiles(this.source as Folder, nodes, isCopy)
 
 			// Reset selection after we dropped the files
 			// if the dropped files are within the selection
-			if (this.draggingFiles.some(fileid => this.selectedFiles.includes(fileid))) {
+			if (selection.some(fileid => this.selectedFiles.includes(fileid))) {
 				logger.debug('Dropped selection, resetting select store...')
 				this.selectionStore.reset()
 			}
diff --git a/apps/files/src/services/DropService.ts b/apps/files/src/services/DropService.ts
index b3371f44337..a2a551f8f5e 100644
--- a/apps/files/src/services/DropService.ts
+++ b/apps/files/src/services/DropService.ts
@@ -2,6 +2,7 @@
  * @copyright Copyright (c) 2023 Ferdinand Thiessen <opensource@fthiessen.de>
  *
  * @author Ferdinand Thiessen <opensource@fthiessen.de>
+ * @author John Molakvoæ <skjnldsv@protonmail.com>
  *
  * @license AGPL-3.0-or-later
  *
@@ -23,13 +24,16 @@
 import type { Upload } from '@nextcloud/upload'
 import type { FileStat, ResponseDataDetailed } from 'webdav'
 
-import { davGetClient, davGetDefaultPropfind, davResultToNode, davRootPath } from '@nextcloud/files'
 import { emit } from '@nextcloud/event-bus'
+import { Folder, Node, NodeStatus, davGetClient, davGetDefaultPropfind, davResultToNode, davRootPath } from '@nextcloud/files'
 import { getUploader } from '@nextcloud/upload'
 import { joinPaths } from '@nextcloud/paths'
-import { showError } from '@nextcloud/dialogs'
+import { showError, showSuccess } from '@nextcloud/dialogs'
 import { translate as t } from '@nextcloud/l10n'
+import Vue from 'vue'
 
+import { handleCopyMoveNodeTo } from '../actions/moveOrCopyAction'
+import { MoveCopyAction } from '../actions/moveOrCopyActionUtils'
 import logger from '../logger.js'
 
 export const handleDrop = async (data: DataTransfer): Promise<Upload[]> => {
@@ -141,3 +145,70 @@ function readDirectory(directory: FileSystemDirectoryEntry) {
 		getEntries()
 	})
 }
+
+export const onDropExternalFiles = async (destination: Folder, files: FileList) => {
+	const uploader = getUploader()
+
+	// Check whether the uploader is in the same folder
+	// This should never happen™
+	if (!uploader.destination.path.startsWith(uploader.destination.path)) {
+		logger.error('The current uploader destination is not the same as the current folder')
+		showError(t('files', 'An error occurred while uploading. Please try again later.'))
+		return
+	}
+
+	const previousDestination = uploader.destination
+	if (uploader.destination.path !== destination.path) {
+		logger.debug('Changing uploader destination', { previous: uploader.destination.path, new: destination.path })
+		uploader.destination = destination
+	}
+
+	logger.debug(`Uploading files to ${destination.path}`)
+	const queue = [] as Promise<Upload>[]
+	for (const file of files) {
+		// Because the uploader destination is properly set to the current folder
+		// we can just use the basename as the relative path.
+		queue.push(uploader.upload(file.name, file))
+	}
+
+	// Wait for all promises to settle
+	const results = await Promise.allSettled(queue)
+
+	// Reset the uploader destination
+	uploader.destination = previousDestination
+
+	// Check for errors
+	const errors = results.filter(result => result.status === 'rejected')
+	if (errors.length > 0) {
+		logger.error('Error while uploading files', { errors })
+		showError(t('files', 'Some files could not be uploaded'))
+		return
+	}
+
+	logger.debug('Files uploaded successfully')
+	showSuccess(t('files', 'Files uploaded successfully'))
+}
+
+export const onDropInternalFiles = async (destination: Folder, nodes: Node[], isCopy = false) => {
+	const queue = [] as Promise<void>[]
+	for (const node of nodes) {
+		Vue.set(node, 'status', NodeStatus.LOADING)
+		// TODO: resolve potential conflicts prior and force overwrite
+		queue.push(handleCopyMoveNodeTo(node, destination, isCopy ? MoveCopyAction.COPY : MoveCopyAction.MOVE))
+	}
+
+	// Wait for all promises to settle
+	const results = await Promise.allSettled(queue)
+	nodes.forEach(node => Vue.set(node, 'status', undefined))
+
+	// Check for errors
+	const errors = results.filter(result => result.status === 'rejected')
+	if (errors.length > 0) {
+		logger.error('Error while copying or moving files', { errors })
+		showError(isCopy ? t('files', 'Some files could not be copied') : t('files', 'Some files could not be moved'))
+		return
+	}
+
+	logger.debug('Files copy/move successful')
+	showSuccess(isCopy ? t('files', 'Files copied successfully') : t('files', 'Files moved successfully'))
+}