/
googledrive.go
134 lines (116 loc) · 3.18 KB
/
googledrive.go
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package googledrive2hugo
import (
"fmt"
"io/ioutil"
"path/filepath"
"strings"
"google.golang.org/api/drive/v3"
)
func IsDir(f *drive.File) bool {
return f.MimeType == "application/vnd.google-apps.folder"
}
func IsGoogleDoc(f *drive.File) bool {
return f.MimeType == "application/vnd.google-apps.document"
}
type WalkFunc func(srv *drive.Service, path string, info *drive.File, err error) error
func walk(srv *drive.Service, path string, info *drive.File, walkFn WalkFunc) error {
// search returns trashed files...
// skip them
// TODO: can search just skip these automatically?
if info.Trashed {
return nil
}
err := walkFn(srv, path, info, nil)
if err != nil {
if IsDir(info) && err != filepath.SkipDir {
return nil
}
return fmt.Errorf("%s: %s", path, err)
}
if !IsDir(info) {
return nil
}
query := fmt.Sprintf("parents in '%s'", info.Id)
names, err := srv.Files.List().Fields("files(id,name,mimeType,createdTime,modifiedTime,description)").Spaces("drive").Corpora("user").Q(query).Do()
if err != nil {
return walkFn(srv, path, info, err)
}
for _, fileInfo := range names.Files {
// skip trashed files
if fileInfo.Trashed {
continue
}
filename := filepath.Join(path, fileInfo.Name)
if err != nil {
if err := walkFn(srv, filename, fileInfo, err); err != nil && err != filepath.SkipDir {
return err
}
} else {
err = walk(srv, filename, fileInfo, walkFn)
if err != nil {
if !IsDir(fileInfo) || err != filepath.SkipDir {
return err
}
}
}
}
return nil
}
func Walk(srv *drive.Service, root string, walkfn WalkFunc) error {
var info *drive.File
parent := "root"
// TODO -- this may not be exactly right
// but can't find the right thing in golang path module
parts := strings.Split(root, "/")
for _, dir := range parts {
query := fmt.Sprintf("name='%s' and mimeType='application/vnd.google-apps.folder' and '%s' in parents", dir, parent)
r, err := srv.Files.List().Spaces("drive").Corpora("user").Q(query).Do()
if err != nil {
return err
}
if len(r.Files) == 0 {
return fmt.Errorf("%q not found", root)
}
if len(r.Files) > 1 {
return fmt.Errorf("more than file for %q found", root)
}
info = r.Files[0]
parent = info.Id
}
err := walk(srv, "", info, walkfn)
if err == filepath.SkipDir {
return nil
}
return err
}
// ExportHTML downloads a Google Doc as HTML
// Download as Zip and unzip
func ExportHTML(srv *drive.Service, f *drive.File) ([]byte, error) {
resp, err := srv.Files.Export(f.Id, "text/html").Download()
if err != nil {
return nil, err
}
out, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
return out, resp.Body.Close()
}
// output map is the one used by Hugo
func FileInfoToMeta(fileInfo *drive.File) map[string]interface{} {
meta := make(map[string]interface{})
// Google File Metadata:
// https://godoc.org/google.golang.org/api/drive/v3#File
//
// Note: description can only be set via gDrive, not gDocs
//
// Hugo Front Matter:
// https://gohugo.io/content-management/front-matter/
//
meta["date"] = fileInfo.CreatedTime
meta["lastmod"] = fileInfo.ModifiedTime
if fileInfo.Description != "" {
meta["description"] = fileInfo.Description
}
return meta
}