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format.go
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format.go
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package deepdiff
import (
"bytes"
"encoding/json"
"fmt"
"io"
"strings"
)
// FormatPrettyString is a convenience wrapper that outputs to a string instead
// of an io.Writer
func FormatPrettyString(changes Deltas, colorTTY bool) (string, error) {
buf := &bytes.Buffer{}
if err := FormatPretty(buf, changes, colorTTY); err != nil {
return "", err
}
return buf.String(), nil
}
// FormatPretty writes a text report to w. if colorTTY is true it will add
// red "-" for deletions
// green "+" for insertions
// blue "~" for changes (an insert & delete at the same path)
// This is very much a work in progress
func FormatPretty(w io.Writer, changes Deltas, colorTTY bool) error {
var colorMap map[Operation]string
if colorTTY {
colorMap = ttyColorMap()
}
return formatPretty(w, changes, 0, colorMap)
}
func ttyColorMap() map[Operation]string {
return map[Operation]string{
Operation("close"): "\x1b[0m", // end color tag
DTContext: "\x1b[37m", // netural
DTInsert: "\x1b[32m", // green
DTDelete: "\x1b[31m", // red
DTUpdate: "\x1b[34m", // blue
}
}
func formatPretty(w io.Writer, changes Deltas, indent int, colorMap map[Operation]string) error {
for _, d := range changes {
dataStr := ""
if d.Value != nil {
d, err := json.Marshal(d.Value)
if err != nil {
return err
}
dataStr = string(d)
}
fmt.Fprintf(w, "%s%s%s%s: %s%s\n", strings.Repeat(" ", indent), colorMap[d.Type], d.Type, d.Path, dataStr, colorMap[Operation("close")])
if len(d.Deltas) > 0 {
if err := formatPretty(w, d.Deltas, indent+1, colorMap); err != nil {
return err
}
}
}
return nil
}
// FormatPrettyStatsString prints a string of stats info
func FormatPrettyStatsString(diffStat *Stats, colorTTY bool) string {
buf := &bytes.Buffer{}
FormatPrettyStats(buf, diffStat, colorTTY)
return buf.String()
}
// FormatPrettyStats writes stats info to a supplied writer destination,
// optionally adding terminal color tags
func FormatPrettyStats(w io.Writer, diffStat *Stats, colorTTY bool) {
var colorMap map[Operation]string
if colorTTY {
colorMap = ttyColorMap()
}
formatStats(w, diffStat, colorMap)
}
func formatStats(w io.Writer, ds *Stats, colorMap map[Operation]string) {
if ds == nil {
return
}
closeColor := colorMap[Operation("close")]
elsColor := colorMap[DTInsert]
change := ds.NodeChange()
elementsWord := "elements"
sign := "+"
if change < 0 {
elsColor = colorMap[DTDelete]
sign = ""
} else if change == 0 {
elsColor = colorMap[DTContext]
sign = ""
}
if change == 1 || change == -1 {
elementsWord = "element"
}
fmt.Fprintf(w, "%s%s%d %s%s%s%s.",
elsColor, sign, change, closeColor,
colorMap[DTContext], elementsWord, closeColor,
)
insertsWord := "inserts"
if ds.Inserts == 1 {
insertsWord = "insert"
}
fmt.Fprintf(w, " %s%d %s.%s", colorMap[DTInsert], ds.Inserts, insertsWord, closeColor)
deletesWord := "deletes"
if ds.Deletes == 1 {
deletesWord = "delete"
}
fmt.Fprintf(w, " %s%d %s.%s", colorMap[DTDelete], ds.Deletes, deletesWord, closeColor)
if ds.Updates > 0 {
updatesWord := "updates"
if ds.Updates == 1 {
updatesWord = "update"
}
fmt.Fprintf(w, " %s%d %s.%s", colorMap[DTUpdate], ds.Updates, updatesWord, closeColor)
}
fmt.Fprintf(w, "\n")
}