overleaf/services/web/frontend/js/shared/context/file-tree-data-context.js

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import {
createContext,
useCallback,
useReducer,
useContext,
useMemo,
useState,
} from 'react'
import PropTypes from 'prop-types'
import useScopeValue from '../hooks/use-scope-value'
import {
renameInTree,
deleteInTree,
moveInTree,
createEntityInTree,
} from '../../features/file-tree/util/mutate-in-tree'
import { countFiles } from '../../features/file-tree/util/count-in-tree'
import useDeepCompareEffect from '../../shared/hooks/use-deep-compare-effect'
const FileTreeDataContext = createContext()
const fileTreeDataPropType = PropTypes.shape({
_id: PropTypes.string.isRequired,
name: PropTypes.string.isRequired,
docs: PropTypes.array.isRequired,
fileRefs: PropTypes.array.isRequired,
folders: PropTypes.array.isRequired,
})
FileTreeDataContext.Provider.propTypes = {
value: PropTypes.shape({
// fileTreeData is the up-to-date representation of the files list, updated
// by the file tree
fileTreeData: fileTreeDataPropType,
hasFolders: PropTypes.bool,
}),
}
const ACTION_TYPES = {
RENAME: 'RENAME',
RESET: 'RESET',
DELETE: 'DELETE',
MOVE: 'MOVE',
CREATE: 'CREATE',
}
function fileTreeMutableReducer({ fileTreeData }, action) {
switch (action.type) {
case ACTION_TYPES.RESET: {
const newFileTreeData = action.fileTreeData
return {
fileTreeData: newFileTreeData,
fileCount: countFiles(newFileTreeData),
}
}
case ACTION_TYPES.RENAME: {
const newFileTreeData = renameInTree(fileTreeData, action.id, {
newName: action.newName,
})
return {
fileTreeData: newFileTreeData,
fileCount: countFiles(newFileTreeData),
}
}
case ACTION_TYPES.DELETE: {
const newFileTreeData = deleteInTree(fileTreeData, action.id)
return {
fileTreeData: newFileTreeData,
fileCount: countFiles(newFileTreeData),
}
}
case ACTION_TYPES.MOVE: {
const newFileTreeData = moveInTree(
fileTreeData,
action.entityId,
action.toFolderId
)
return {
fileTreeData: newFileTreeData,
fileCount: countFiles(newFileTreeData),
}
}
case ACTION_TYPES.CREATE: {
const newFileTreeData = createEntityInTree(
fileTreeData,
action.parentFolderId,
action.entity
)
return {
fileTreeData: newFileTreeData,
fileCount: countFiles(newFileTreeData),
}
}
default: {
throw new Error(`Unknown mutable file tree action type: ${action.type}`)
}
}
}
const initialState = rootFolder => {
const fileTreeData = rootFolder?.[0]
return {
fileTreeData,
fileCount: countFiles(fileTreeData),
}
}
export function useFileTreeData(propTypes) {
const context = useContext(FileTreeDataContext)
if (!context) {
throw new Error(
'useFileTreeData is only available inside FileTreeDataProvider'
)
}
PropTypes.checkPropTypes(
propTypes,
context,
'data',
'FileTreeDataContext.Provider'
)
return context
}
export function FileTreeDataProvider({ children }) {
const [project] = useScopeValue('project', true)
const { rootFolder } = project || {}
const [{ fileTreeData, fileCount }, dispatch] = useReducer(
fileTreeMutableReducer,
rootFolder,
initialState
)
const [selectedEntities, setSelectedEntities] = useState([])
useDeepCompareEffect(() => {
dispatch({
type: ACTION_TYPES.RESET,
fileTreeData: rootFolder?.[0],
})
}, [rootFolder])
const dispatchCreateFolder = useCallback((parentFolderId, entity) => {
entity.type = 'folder'
dispatch({
type: ACTION_TYPES.CREATE,
parentFolderId,
entity,
})
}, [])
const dispatchCreateDoc = useCallback((parentFolderId, entity) => {
entity.type = 'doc'
dispatch({
type: ACTION_TYPES.CREATE,
parentFolderId,
entity,
})
}, [])
const dispatchCreateFile = useCallback((parentFolderId, entity) => {
entity.type = 'fileRef'
dispatch({
type: ACTION_TYPES.CREATE,
parentFolderId,
entity,
})
}, [])
const dispatchRename = useCallback((id, newName) => {
dispatch({
type: ACTION_TYPES.RENAME,
newName,
id,
})
}, [])
const dispatchDelete = useCallback(id => {
dispatch({ type: ACTION_TYPES.DELETE, id })
}, [])
const dispatchMove = useCallback((entityId, toFolderId) => {
dispatch({ type: ACTION_TYPES.MOVE, entityId, toFolderId })
}, [])
const value = useMemo(() => {
return {
dispatchCreateDoc,
dispatchCreateFile,
dispatchCreateFolder,
dispatchDelete,
dispatchMove,
dispatchRename,
fileCount,
fileTreeData,
hasFolders: fileTreeData?.folders.length > 0,
selectedEntities,
setSelectedEntities,
}
}, [
dispatchCreateDoc,
dispatchCreateFile,
dispatchCreateFolder,
dispatchDelete,
dispatchMove,
dispatchRename,
fileCount,
fileTreeData,
selectedEntities,
setSelectedEntities,
])
return (
<FileTreeDataContext.Provider value={value}>
{children}
</FileTreeDataContext.Provider>
)
}
FileTreeDataProvider.propTypes = {
children: PropTypes.any,
}