restore: add basic json progress

internal/ui/backup/json.go

@@ -1,8 +1,6 @@
 package backup
 
 import (
-	"bytes"
-	"encoding/json"
 	"sort"
 	"time"
 
@@ -32,21 +30,12 @@ func NewJSONProgress(term *termstatus.Terminal, verbosity uint) *JSONProgress {
 	}
 }
 
-func toJSONString(status interface{}) string {
-	buf := new(bytes.Buffer)
-	err := json.NewEncoder(buf).Encode(status)
-	if err != nil {
-		panic(err)
-	}
-	return buf.String()
-}
-
 func (b *JSONProgress) print(status interface{}) {
-	b.term.Print(toJSONString(status))
+	b.term.Print(ui.ToJSONString(status))
 }
 
 func (b *JSONProgress) error(status interface{}) {
-	b.term.Error(toJSONString(status))
+	b.term.Error(ui.ToJSONString(status))
 }
 
 // Update updates the status lines.

internal/ui/format.go

@@ -1,6 +1,8 @@
 package ui
 
 import (
+	"bytes"
+	"encoding/json"
 	"fmt"
 	"time"
 )
@@ -53,3 +55,12 @@ func FormatSeconds(sec uint64) string {
 	}
 	return fmt.Sprintf("%d:%02d", min, sec)
 }
+
+func ToJSONString(status interface{}) string {
+	buf := new(bytes.Buffer)
+	err := json.NewEncoder(buf).Encode(status)
+	if err != nil {
+		panic(err)
+	}
+	return buf.String()
+}

internal/ui/restore/json.go

@@ -0,0 +1,69 @@
+package restore
+
+import (
+	"time"
+
+	"github.com/restic/restic/internal/ui"
+)
+
+type jsonPrinter struct {
+	terminal term
+}
+
+func NewJSONProgress(terminal term) ProgressPrinter {
+	return &jsonPrinter{
+		terminal: terminal,
+	}
+}
+
+func (t *jsonPrinter) print(status interface{}) {
+	t.terminal.Print(ui.ToJSONString(status))
+}
+
+func (t *jsonPrinter) Update(filesFinished, filesTotal, allBytesWritten, allBytesTotal uint64, duration time.Duration) {
+	status := statusUpdate{
+		MessageType:    "status",
+		SecondsElapsed: uint64(duration / time.Second),
+		TotalFiles:     filesTotal,
+		FilesDone:      filesFinished,
+		TotalBytes:     allBytesTotal,
+		BytesDone:      allBytesWritten,
+	}
+
+	if allBytesTotal > 0 {
+		status.PercentDone = float64(allBytesWritten) / float64(allBytesTotal)
+	}
+
+	t.print(status)
+}
+
+func (t *jsonPrinter) Finish(filesFinished, filesTotal, allBytesWritten, allBytesTotal uint64, duration time.Duration) {
+	status := summaryOutput{
+		MessageType:    "summary",
+		SecondsElapsed: uint64(duration / time.Second),
+		TotalFiles:     filesTotal,
+		FilesDone:      filesFinished,
+		TotalBytes:     allBytesTotal,
+		BytesDone:      allBytesWritten,
+	}
+	t.print(status)
+}
+
+type statusUpdate struct {
+	MessageType    string  `json:"message_type"` // "status"
+	SecondsElapsed uint64  `json:"seconds_elapsed,omitempty"`
+	PercentDone    float64 `json:"percent_done"`
+	TotalFiles     uint64  `json:"total_files,omitempty"`
+	FilesDone      uint64  `json:"files_done,omitempty"`
+	TotalBytes     uint64  `json:"total_bytes,omitempty"`
+	BytesDone      uint64  `json:"bytes_done,omitempty"`
+}
+
+type summaryOutput struct {
+	MessageType    string `json:"message_type"` // "summary"
+	SecondsElapsed uint64 `json:"seconds_elapsed,omitempty"`
+	TotalFiles     uint64 `json:"total_files,omitempty"`
+	FilesDone      uint64 `json:"files_done,omitempty"`
+	TotalBytes     uint64 `json:"total_bytes,omitempty"`
+	BytesDone      uint64 `json:"bytes_done,omitempty"`
+}

internal/ui/restore/text.go

@@ -11,7 +11,7 @@ type textPrinter struct {
 	terminal term
 }
 
-func NewTextPrinter(terminal term) ProgressPrinter {
+func NewTextProgress(terminal term) ProgressPrinter {
 	return &textPrinter{
 		terminal: terminal,
 	}

internal/ui/restore/text_test.go

@@ -21,21 +21,21 @@ func (m *mockTerm) SetStatus(lines []string) {
 
 func TestPrintUpdate(t *testing.T) {
 	term := &mockTerm{}
-	printer := NewTextPrinter(term)
+	printer := NewTextProgress(term)
 	printer.Update(3, 11, 29, 47, 5*time.Second)
 	test.Equals(t, []string{"[0:05] 61.70%  3 files 29 B, total 11 files 47 B"}, term.output)
 }
 
 func TestPrintSummaryOnSuccess(t *testing.T) {
 	term := &mockTerm{}
-	printer := NewTextPrinter(term)
+	printer := NewTextProgress(term)
 	printer.Finish(11, 11, 47, 47, 5*time.Second)
 	test.Equals(t, []string{"Summary: Restored 11 Files (47 B) in 0:05"}, term.output)
 }
 
 func TestPrintSummaryOnErrors(t *testing.T) {
 	term := &mockTerm{}
-	printer := NewTextPrinter(term)
+	printer := NewTextProgress(term)
 	printer.Finish(3, 11, 29, 47, 5*time.Second)
 	test.Equals(t, []string{"Summary: Restored 3 / 11 Files (29 B / 47 B) in 0:05"}, term.output)
 }