overleaf/services/web/frontend/js/features/file-tree/contexts/file-tree-actionable.js

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import React, {
createContext,
useCallback,
useMemo,
useReducer,
useContext,
} from 'react'
import PropTypes from 'prop-types'
import { mapSeries } from '../../../infrastructure/promise'
import {
syncRename,
syncDelete,
syncMove,
syncCreateEntity,
} from '../util/sync-mutation'
import { findInTreeOrThrow } from '../util/find-in-tree'
import { isNameUniqueInFolder } from '../util/is-name-unique-in-folder'
import { isBlockedFilename, isCleanFilename } from '../util/safe-path'
import { useFileTreeMainContext } from './file-tree-main'
import { useFileTreeMutable } from './file-tree-mutable'
import { useFileTreeSelectable } from './file-tree-selectable'
import {
InvalidFilenameError,
BlockedFilenameError,
DuplicateFilenameError,
DuplicateFilenameMoveError,
} from '../errors'
const FileTreeActionableContext = createContext()
const ACTION_TYPES = {
START_RENAME: 'START_RENAME',
START_DELETE: 'START_DELETE',
DELETING: 'DELETING',
START_CREATE_FILE: 'START_CREATE_FILE',
START_CREATE_FOLDER: 'START_CREATE_FOLDER',
CREATING_FILE: 'CREATING_FILE',
CREATING_FOLDER: 'CREATING_FOLDER',
MOVING: 'MOVING',
CANCEL: 'CANCEL',
CLEAR: 'CLEAR',
ERROR: 'ERROR',
}
const defaultState = {
isDeleting: false,
isRenaming: false,
isCreatingFile: false,
isCreatingFolder: false,
isMoving: false,
inFlight: false,
actionedEntities: null,
newFileCreateMode: null,
error: null,
}
function fileTreeActionableReadOnlyReducer(state) {
return state
}
function fileTreeActionableReducer(state, action) {
switch (action.type) {
case ACTION_TYPES.START_RENAME:
return { ...defaultState, isRenaming: true }
case ACTION_TYPES.START_DELETE:
return {
...defaultState,
isDeleting: true,
actionedEntities: action.actionedEntities,
}
case ACTION_TYPES.START_CREATE_FILE:
return {
...defaultState,
isCreatingFile: true,
newFileCreateMode: action.newFileCreateMode,
}
case ACTION_TYPES.START_CREATE_FOLDER:
return { ...defaultState, isCreatingFolder: true }
case ACTION_TYPES.CREATING_FILE:
return {
...defaultState,
isCreatingFile: true,
newFileCreateMode: state.newFileCreateMode,
inFlight: true,
}
case ACTION_TYPES.CREATING_FOLDER:
return { ...defaultState, isCreatingFolder: true, inFlight: true }
case ACTION_TYPES.DELETING:
// keep `actionedEntities` so the entities list remains displayed in the
// delete modal
return {
...defaultState,
isDeleting: true,
inFlight: true,
actionedEntities: state.actionedEntities,
}
case ACTION_TYPES.MOVING:
return {
...defaultState,
isMoving: true,
inFlight: true,
}
case ACTION_TYPES.CLEAR:
return { ...defaultState }
case ACTION_TYPES.CANCEL:
if (state.inFlight) return state
return { ...defaultState }
case ACTION_TYPES.ERROR:
return { ...state, inFlight: false, error: action.error }
default:
throw new Error(`Unknown user action type: ${action.type}`)
}
}
export function FileTreeActionableProvider({ hasWritePermissions, children }) {
const [state, dispatch] = useReducer(
hasWritePermissions
? fileTreeActionableReducer
: fileTreeActionableReadOnlyReducer,
defaultState
)
const { projectId } = useFileTreeMainContext()
const { fileTreeData, dispatchRename, dispatchMove } = useFileTreeMutable()
const { selectedEntityIds } = useFileTreeSelectable()
const startRenaming = useCallback(() => {
dispatch({ type: ACTION_TYPES.START_RENAME })
}, [])
// update the entity with the new name immediately in the tree, but revert to
// the old name if the sync fails
const finishRenaming = useCallback(
newName => {
const selectedEntityId = Array.from(selectedEntityIds)[0]
const found = findInTreeOrThrow(fileTreeData, selectedEntityId)
const oldName = found.entity.name
if (newName === oldName) {
return dispatch({ type: ACTION_TYPES.CLEAR })
}
const error = validateRename(fileTreeData, found, newName)
if (error) return dispatch({ type: ACTION_TYPES.ERROR, error })
dispatch({ type: ACTION_TYPES.CLEAR })
dispatchRename(selectedEntityId, newName)
return syncRename(projectId, found.type, found.entity._id, newName).catch(
error => {
dispatchRename(selectedEntityId, oldName)
// The state from this error action isn't used anywhere right now
// but we need to handle the error for linting
dispatch({ type: ACTION_TYPES.ERROR, error })
}
)
},
[dispatchRename, fileTreeData, projectId, selectedEntityIds]
)
const isDuplicate = useCallback(
(parentFolderId, name) => {
return !isNameUniqueInFolder(fileTreeData, parentFolderId, name)
},
[fileTreeData]
)
// init deletion flow (this will open the delete modal).
// A copy of the selected entities is set as `actionedEntities` so it is kept
// unchanged as the entities are deleted and the selection is updated
const startDeleting = useCallback(() => {
const actionedEntities = Array.from(selectedEntityIds).map(
entityId => findInTreeOrThrow(fileTreeData, entityId).entity
)
dispatch({ type: ACTION_TYPES.START_DELETE, actionedEntities })
}, [fileTreeData, selectedEntityIds])
// deletes entities in series. Tree will be updated via the socket event
const finishDeleting = useCallback(() => {
dispatch({ type: ACTION_TYPES.DELETING })
return mapSeries(Array.from(selectedEntityIds), id => {
const found = findInTreeOrThrow(fileTreeData, id)
return syncDelete(projectId, found.type, found.entity._id).catch(
error => {
// throw unless 404
if (error.info.statusCode !== 404) {
throw error
}
}
)
})
.then(() => {
dispatch({ type: ACTION_TYPES.CLEAR })
})
.catch(error => {
// set an error and allow user to retry
dispatch({ type: ACTION_TYPES.ERROR, error })
})
}, [fileTreeData, projectId, selectedEntityIds])
// moves entities. Tree is updated immediately and data are sync'd after.
const finishMoving = useCallback(
(toFolderId, draggedEntityIds) => {
dispatch({ type: ACTION_TYPES.MOVING })
// find entities and filter out no-ops
const founds = Array.from(draggedEntityIds)
.map(draggedEntityId =>
findInTreeOrThrow(fileTreeData, draggedEntityId)
)
.filter(found => found.parentFolderId !== toFolderId)
// make sure all entities can be moved, return early otherwise
const isMoveToRoot = toFolderId === fileTreeData._id
const validationError = founds
.map(found =>
validateMove(fileTreeData, toFolderId, found, isMoveToRoot)
)
.find(error => error)
if (validationError) {
return dispatch({ type: ACTION_TYPES.ERROR, error: validationError })
}
// dispatch moves immediately
founds.forEach(found => dispatchMove(found.entity._id, toFolderId))
// sync dispatched moves after
return mapSeries(founds, found =>
syncMove(projectId, found.type, found.entity._id, toFolderId)
)
.then(() => {
dispatch({ type: ACTION_TYPES.CLEAR })
})
.catch(error => {
dispatch({ type: ACTION_TYPES.ERROR, error })
})
},
[dispatchMove, fileTreeData, projectId]
)
const startCreatingFolder = useCallback(() => {
dispatch({ type: ACTION_TYPES.START_CREATE_FOLDER })
}, [])
const parentFolderId = useMemo(
() => getSelectedParentFolderId(fileTreeData, selectedEntityIds),
[fileTreeData, selectedEntityIds]
)
const finishCreatingEntity = useCallback(
entity => {
const error = validateCreate(fileTreeData, parentFolderId, entity)
if (error) {
return Promise.reject(error)
}
return syncCreateEntity(projectId, parentFolderId, entity)
},
[fileTreeData, parentFolderId, projectId]
)
const finishCreatingFolder = useCallback(
name => {
dispatch({ type: ACTION_TYPES.CREATING_FOLDER })
return finishCreatingEntity({ endpoint: 'folder', name })
.then(() => {
dispatch({ type: ACTION_TYPES.CLEAR })
})
.catch(error => {
dispatch({ type: ACTION_TYPES.ERROR, error })
})
},
[finishCreatingEntity]
)
const startCreatingFile = useCallback(newFileCreateMode => {
dispatch({ type: ACTION_TYPES.START_CREATE_FILE, newFileCreateMode })
}, [])
const startCreatingDocOrFile = useCallback(() => {
startCreatingFile('doc')
}, [startCreatingFile])
const startUploadingDocOrFile = useCallback(() => {
startCreatingFile('upload')
}, [startCreatingFile])
const finishCreatingDocOrFile = useCallback(
entity => {
dispatch({ type: ACTION_TYPES.CREATING_FILE })
return finishCreatingEntity(entity)
.then(() => {
dispatch({ type: ACTION_TYPES.CLEAR })
})
.catch(error => {
dispatch({ type: ACTION_TYPES.ERROR, error })
})
},
[finishCreatingEntity]
)
const finishCreatingDoc = useCallback(
entity => {
entity.endpoint = 'doc'
return finishCreatingDocOrFile(entity)
},
[finishCreatingDocOrFile]
)
const finishCreatingLinkedFile = useCallback(
entity => {
entity.endpoint = 'linked_file'
return finishCreatingDocOrFile(entity)
},
[finishCreatingDocOrFile]
)
const cancel = useCallback(() => {
dispatch({ type: ACTION_TYPES.CANCEL })
}, [])
const value = {
canDelete: selectedEntityIds.size > 0,
canRename: selectedEntityIds.size === 1,
canCreate: selectedEntityIds.size < 2,
...state,
parentFolderId,
isDuplicate,
startRenaming,
finishRenaming,
startDeleting,
finishDeleting,
finishMoving,
startCreatingFile,
startCreatingFolder,
finishCreatingFolder,
startCreatingDocOrFile,
startUploadingDocOrFile,
finishCreatingDoc,
finishCreatingLinkedFile,
cancel,
}
return (
<FileTreeActionableContext.Provider value={value}>
{children}
</FileTreeActionableContext.Provider>
)
}
FileTreeActionableProvider.propTypes = {
hasWritePermissions: PropTypes.bool.isRequired,
children: PropTypes.oneOfType([
PropTypes.arrayOf(PropTypes.node),
PropTypes.node,
]).isRequired,
}
export function useFileTreeActionable() {
const context = useContext(FileTreeActionableContext)
if (!context) {
throw new Error(
'useFileTreeActionable is only available inside FileTreeActionableProvider'
)
}
return context
}
function getSelectedParentFolderId(fileTreeData, selectedEntityIds) {
// we expect only one entity to be selected in that case, so we pick the first
const selectedEntityId = Array.from(selectedEntityIds)[0]
if (!selectedEntityId) {
// in some cases no entities are selected. Return the root folder id then.
return fileTreeData._id
}
const found = findInTreeOrThrow(fileTreeData, selectedEntityId)
return found.type === 'folder' ? found.entity._id : found.parentFolderId
}
function validateCreate(fileTreeData, parentFolderId, entity) {
if (!isCleanFilename(entity.name)) {
return new InvalidFilenameError()
}
if (!isNameUniqueInFolder(fileTreeData, parentFolderId, entity.name)) {
return new DuplicateFilenameError()
}
// check that the name of a file is allowed, if creating in the root folder
const isMoveToRoot = parentFolderId === fileTreeData._id
const isFolder = entity.endpoint === 'folder'
if (isMoveToRoot && !isFolder && isBlockedFilename(entity.name)) {
return new BlockedFilenameError()
}
}
function validateRename(fileTreeData, found, newName) {
if (!isCleanFilename(newName)) {
return new InvalidFilenameError()
}
if (!isNameUniqueInFolder(fileTreeData, found.parentFolderId, newName)) {
return new DuplicateFilenameError()
}
const isTopLevel = found.path.length === 1
const isFolder = found.type === 'folder'
if (isTopLevel && !isFolder && isBlockedFilename(newName)) {
return new BlockedFilenameError()
}
}
function validateMove(fileTreeData, toFolderId, found, isMoveToRoot) {
if (!isNameUniqueInFolder(fileTreeData, toFolderId, found.entity.name)) {
const error = new DuplicateFilenameMoveError()
error.entityName = found.entity.name
return error
}
const isFolder = found.type === 'folder'
if (isMoveToRoot && !isFolder && isBlockedFilename(found.entity.name)) {
return new BlockedFilenameError()
}
}