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paths.go
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paths.go
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package bernard
import (
"fmt"
"path/filepath"
"github.com/l3uddz/bernard"
"github.com/l3uddz/bernard/datastore"
"github.com/l3uddz/bernard/datastore/sqlite"
)
type Paths struct {
NewFolders []string
OldFolders []string
}
func NewPathsHook(driveID string, store *bds, diff *sqlite.Difference) (bernard.Hook, *Paths) {
var paths Paths
hook := func(drive datastore.Drive, files []datastore.File, folders []datastore.Folder, removed []string) error {
// get folders from diff (that we are interested in)
parents, err := getDiffFolders(store, driveID, diff)
if err != nil {
return fmt.Errorf("getting parents: %w", err)
}
// get roots from folders
rootNewFolders, _ := datastore.RootFolders(parents.New)
rootOldFolders, _ := datastore.RootFolders(parents.Old)
// get new/changed paths
for _, folder := range rootNewFolders {
p, err := getFolderPath(store, driveID, folder.ID, parents.FolderMaps.Current)
if err != nil {
return fmt.Errorf("building folder path: %v: %w", folder.ID, err)
}
paths.NewFolders = append(paths.NewFolders, p)
}
// get removed paths
for _, folder := range rootOldFolders {
p, err := getFolderPath(store, driveID, folder.ID, parents.FolderMaps.Old)
if err != nil {
return fmt.Errorf("building old folder path: %v: %w", folder.ID, err)
}
paths.OldFolders = append(paths.OldFolders, p)
}
return nil
}
return hook, &paths
}
type diffFolderMaps struct {
Current map[string]datastore.Folder
Old map[string]datastore.Folder
}
func getDiffFolderMaps(diff *sqlite.Difference) *diffFolderMaps {
currentFolders := make(map[string]datastore.Folder)
oldFolders := make(map[string]datastore.Folder)
for i, f := range diff.AddedFolders {
currentFolders[f.ID] = diff.AddedFolders[i]
oldFolders[f.ID] = diff.AddedFolders[i]
}
for i, f := range diff.ChangedFolders {
currentFolders[f.New.ID] = diff.ChangedFolders[i].New
oldFolders[f.Old.ID] = diff.ChangedFolders[i].Old
}
for i, f := range diff.RemovedFolders {
oldFolders[f.ID] = diff.RemovedFolders[i]
}
return &diffFolderMaps{
Current: currentFolders,
Old: oldFolders,
}
}
type Parents struct {
New []datastore.Folder
Old []datastore.Folder
FolderMaps *diffFolderMaps
}
func getDiffFolders(store *bds, driveId string, diff *sqlite.Difference) (*Parents, error) {
folderMaps := getDiffFolderMaps(diff)
newParents := make(map[string]datastore.Folder)
oldParents := make(map[string]datastore.Folder)
// changed folders
for _, folder := range diff.ChangedFolders {
newParents[folder.New.ID] = folder.New
oldParents[folder.Old.ID] = folder.Old
}
// removed folders
for _, folder := range diff.RemovedFolders {
oldParents[folder.ID] = folder
}
// added files
for _, file := range diff.AddedFiles {
folder, err := getFolder(store, driveId, file.Parent, folderMaps.Current)
if err != nil {
return nil, fmt.Errorf("added file: %w", err)
}
newParents[folder.ID] = *folder
}
// changed files
for _, file := range diff.ChangedFiles {
// current
currentFolder, err := getFolder(store, driveId, file.New.Parent, folderMaps.Current)
if err != nil {
return nil, fmt.Errorf("changed new file: %w", err)
}
newParents[currentFolder.ID] = *currentFolder
// old
oldFolder, err := getFolder(store, driveId, file.Old.Parent, folderMaps.Old)
if err != nil {
return nil, fmt.Errorf("changed old file: %w", err)
}
oldParents[oldFolder.ID] = *oldFolder
}
// removed files
for _, file := range diff.RemovedFiles {
oldFolder, err := getFolder(store, driveId, file.Parent, folderMaps.Old)
if err != nil {
return nil, fmt.Errorf("removed file: %w", err)
}
oldParents[oldFolder.ID] = *oldFolder
}
// create Parents object
p := &Parents{
New: make([]datastore.Folder, 0),
Old: make([]datastore.Folder, 0),
FolderMaps: folderMaps,
}
for _, folder := range newParents {
p.New = append(p.New, folder)
}
for _, folder := range oldParents {
p.Old = append(p.Old, folder)
}
return p, nil
}
func getFolder(store *bds, driveId string, folderId string, folderMap map[string]datastore.Folder) (*datastore.Folder, error) {
// find folder in map
if folder, ok := folderMap[folderId]; ok {
return &folder, nil
}
if folderId == driveId {
folder := datastore.Folder{
ID: driveId,
Name: "",
Parent: "",
Trashed: false,
}
folderMap[driveId] = folder
return &folder, nil
}
// search datastore
folder, err := store.GetFolder(driveId, folderId)
if err != nil {
return nil, fmt.Errorf("could not get folder: %v: %w", folderId, err)
}
// add folder to map
folderMap[folder.ID] = *folder
return folder, nil
}
func getFolderPath(store *bds, driveId string, folderId string, folderMap map[string]datastore.Folder) (string, error) {
path := ""
// folderId == driveId
if folderId == driveId {
return "/", nil
}
// get top folder
topFolder, ok := folderMap[folderId]
if !ok {
f, err := store.GetFolder(driveId, folderId)
if err != nil {
return filepath.Join("/", path), fmt.Errorf("could not get folder %v: %w", folderId, err)
}
topFolder = *f
}
// set logic variables
path = topFolder.Name
nextFolderId := topFolder.Parent
// get folder paths
for nextFolderId != "" && nextFolderId != driveId {
f, ok := folderMap[nextFolderId]
if !ok {
df, err := store.GetFolder(driveId, nextFolderId)
if err != nil {
return filepath.Join("/", path), fmt.Errorf("could not get folder %v: %w", nextFolderId, err)
}
f = *df
folderMap[f.ID] = f
}
path = filepath.Join(f.Name, path)
nextFolderId = f.Parent
}
return filepath.Join("/", path), nil
}