[WIP] Support JSON output

drive/about.go

@@ -9,6 +9,7 @@ import (
 type AboutArgs struct {
 	Out         io.Writer
 	SizeInBytes bool
+	JsonOutput  int64
 }
 
 func (self *Drive) About(args AboutArgs) (err error) {
@@ -20,6 +21,18 @@ func (self *Drive) About(args AboutArgs) (err error) {
 	user := about.User
 	quota := about.StorageQuota
 
+	if args.JsonOutput > 0 {
+		data := map[string]interface{}{
+			"username":      user.DisplayName,
+			"email":         user.EmailAddress,
+			"used":          quota.Usage,
+			"free":          quota.Limit - quota.Usage,
+			"total":         quota.Limit,
+			"maxuploadsize": about.MaxUploadSize,
+		}
+		return jsonOutput(args.Out, args.JsonOutput == 2, data)
+	}
+
 	fmt.Fprintf(args.Out, "User: %s, %s\n", user.DisplayName, user.EmailAddress)
 	fmt.Fprintf(args.Out, "Used: %s\n", formatSize(quota.Usage, args.SizeInBytes))
 	fmt.Fprintf(args.Out, "Free: %s\n", formatSize(quota.Limit-quota.Usage, args.SizeInBytes))

drive/info.go

@@ -10,6 +10,7 @@ type FileInfoArgs struct {
 	Out         io.Writer
 	Id          string
 	SizeInBytes bool
+	JsonOutput  int64
 }
 
 func (self *Drive) Info(args FileInfoArgs) error {
@@ -24,6 +25,25 @@ func (self *Drive) Info(args FileInfoArgs) error {
 		return err
 	}
 
+	if args.JsonOutput > 0 {
+		data := map[string]interface{}{
+			"Id":          f.Id,
+			"Name":        f.Name,
+			"Path":        absPath,
+			"Description": f.Description,
+			"Mime":        f.MimeType,
+			"Size":        f.Size,
+			"Created":     formatDatetime(f.CreatedTime),
+			"Modified":    formatDatetime(f.ModifiedTime),
+			"Md5sum":      f.Md5Checksum,
+			"Shared":      formatBool(f.Shared),
+			"Parents":     f.Parents,
+			"ViewUrl":     f.WebViewLink,
+			"DownloadUrl": f.WebContentLink,
+		}
+		return jsonOutput(args.Out, args.JsonOutput == 2, data)
+	}
+
 	PrintFileInfo(PrintFileInfoArgs{
 		Out:         args.Out,
 		File:        f,

drive/list.go

@@ -18,6 +18,7 @@ type ListFilesArgs struct {
 	SkipHeader  bool
 	SizeInBytes bool
 	AbsPath     bool
+	JsonOutput  int64
 }
 
 func (self *Drive) List(args ListFilesArgs) (err error) {
@@ -44,6 +45,13 @@ func (self *Drive) List(args ListFilesArgs) (err error) {
 		}
 	}
 
+	if args.JsonOutput > 0 {
+		return OutputFileList(OutputFileListArgs{
+			Out:        args.Out,
+			Files:      files,
+			JsonOutput: args.JsonOutput,
+		})
+	}
 	PrintFileList(PrintFileListArgs{
 		Out:         args.Out,
 		Files:       files,
@@ -97,6 +105,28 @@ func (self *Drive) listAllFiles(args listAllFilesArgs) ([]*drive.File, error) {
 	return files, nil
 }
 
+type OutputFileListArgs struct {
+	Out        io.Writer
+	Files      []*drive.File
+	JsonOutput int64
+}
+
+func OutputFileList(args OutputFileListArgs) error {
+	var data []map[string]interface{}
+
+	for _, f := range args.Files {
+		data = append(data, map[string]interface{}{
+			"id":      f.Id,
+			"name":    f.Name,
+			"type":    filetype(f),
+			"size":    f.Size,
+			"created": formatDatetime(f.CreatedTime),
+		})
+	}
+
+	return jsonOutput(args.Out, args.JsonOutput == 2, data)
+}
+
 type PrintFileListArgs struct {
 	Out         io.Writer
 	Files       []*drive.File

drive/revision_list.go

@@ -13,6 +13,7 @@ type ListRevisionsArgs struct {
 	NameWidth   int64
 	SkipHeader  bool
 	SizeInBytes bool
+	JsonOutput  int64
 }
 
 func (self *Drive) ListRevisions(args ListRevisionsArgs) (err error) {
@@ -21,6 +22,13 @@ func (self *Drive) ListRevisions(args ListRevisionsArgs) (err error) {
 		return fmt.Errorf("Failed listing revisions: %s", err)
 	}
 
+	if args.JsonOutput > 0 {
+		return OutputRevisionList(OutputRevisionListArgs{
+			Out:        args.Out,
+			Revisions:  revList.Revisions,
+			JsonOutput: args.JsonOutput,
+		})
+	}
 	PrintRevisionList(PrintRevisionListArgs{
 		Out:         args.Out,
 		Revisions:   revList.Revisions,
@@ -32,6 +40,28 @@ func (self *Drive) ListRevisions(args ListRevisionsArgs) (err error) {
 	return
 }
 
+type OutputRevisionListArgs struct {
+	Out        io.Writer
+	Revisions  []*drive.Revision
+	JsonOutput int64
+}
+
+func OutputRevisionList(args OutputRevisionListArgs) error {
+	var data []map[string]interface{}
+
+	for _, rev := range args.Revisions {
+		data = append(data, map[string]interface{}{
+			"id":       rev.Id,
+			"name":     rev.OriginalFilename,
+			"size":     rev.Size,
+			"modified": formatDatetime(rev.ModifiedTime),
+			"forever":  rev.KeepForever,
+		})
+	}
+
+	return jsonOutput(args.Out, args.JsonOutput == 2, data)
+}
+
 type PrintRevisionListArgs struct {
 	Out         io.Writer
 	Revisions   []*drive.Revision

drive/util.go

@@ -1,7 +1,9 @@
 package drive
 
 import (
+	"encoding/json"
 	"fmt"
+	"io"
 	"math"
 	"os"
 	"path/filepath"
@@ -56,6 +58,14 @@ func round(n float64) int64 {
 	return int64(math.Floor(n + 0.5))
 }
 
+func jsonOutput(out io.Writer, indent bool, data interface{}) error {
+	enc := json.NewEncoder(out)
+	if indent {
+		enc.SetIndent("", "  ")
+	}
+	return enc.Encode(&data);
+}
+
 func formatBool(b bool) string {
 	return strings.Title(strconv.FormatBool(b))
 }

gdrive.go

@@ -19,6 +19,7 @@ const DefaultTimeout = 5 * 60
 const DefaultQuery = "trashed = false and 'me' in owners"
 const DefaultShareRole = "reader"
 const DefaultShareType = "anyone"
+const DefaultJsonOutput = 0
 
 var DefaultConfigDir = GetDefaultConfigDir()
 
@@ -96,6 +97,12 @@ func main() {
 						Description: "Size in bytes",
 						OmitValue:   true,
 					},
+					cli.IntFlag{
+						Name:         "jsonOutput",
+						Patterns:     []string{"--jsonOutput"},
+						Description:  "Print json output (1: normal, 2: pretty)",
+						DefaultValue: DefaultJsonOutput,
+					},
 				),
 			},
 		},
@@ -371,6 +378,12 @@ func main() {
 						Description: "Show size in bytes",
 						OmitValue:   true,
 					},
+					cli.IntFlag{
+						Name:         "jsonOutput",
+						Patterns:     []string{"--jsonOutput"},
+						Description:  "Print json output (1: normal, 2: pretty)",
+						DefaultValue: DefaultJsonOutput,
+					},
 				),
 			},
 		},
@@ -694,6 +707,12 @@ func main() {
 						Description: "Size in bytes",
 						OmitValue:   true,
 					},
+					cli.IntFlag{
+						Name:         "jsonOutput",
+						Patterns:     []string{"--jsonOutput"},
+						Description:  "Print json output (1: normal, 2: pretty)",
+						DefaultValue: DefaultJsonOutput,
+					},
 				),
 			},
 		},
@@ -810,6 +829,12 @@ func main() {
 						Description: "Show size in bytes",
 						OmitValue:   true,
 					},
+					cli.IntFlag{
+						Name:         "jsonOutput",
+						Patterns:     []string{"--jsonOutput"},
+						Description:  "Print json output (1: normal, 2: pretty)",
+						DefaultValue: DefaultJsonOutput,
+					},
 				),
 			},
 		},

handlers_drive.go

@@ -30,6 +30,7 @@ func listHandler(ctx cli.Context) {
 		SkipHeader:  args.Bool("skipHeader"),
 		SizeInBytes: args.Bool("sizeInBytes"),
 		AbsPath:     args.Bool("absPath"),
+		JsonOutput:  args.Int64("jsonOutput"),
 	})
 	checkErr(err)
 }
@@ -189,6 +190,7 @@ func infoHandler(ctx cli.Context) {
 		Out:         os.Stdout,
 		Id:          args.String("fileId"),
 		SizeInBytes: args.Bool("sizeInBytes"),
+		JsonOutput:  args.Int64("jsonOutput"),
 	})
 	checkErr(err)
 }
@@ -225,6 +227,7 @@ func listRevisionsHandler(ctx cli.Context) {
 		NameWidth:   args.Int64("nameWidth"),
 		SizeInBytes: args.Bool("sizeInBytes"),
 		SkipHeader:  args.Bool("skipHeader"),
+		JsonOutput:  args.Int64("jsonOutput"),
 	})
 	checkErr(err)
 }
@@ -320,6 +323,7 @@ func aboutHandler(ctx cli.Context) {
 	err := newDrive(args).About(drive.AboutArgs{
 		Out:         os.Stdout,
 		SizeInBytes: args.Bool("sizeInBytes"),
+		JsonOutput:  args.Int64("jsonOutput"),
 	})
 	checkErr(err)
 }