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diff.go
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diff.go
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package util
import (
"cmp"
"fmt"
"slices"
"strings"
"github.com/samber/lo"
)
type Diff struct {
Path string `json:"path"`
Old string `json:"o,omitempty"`
New string `json:"n"`
}
func NewDiff(p string, o string, n string) *Diff {
return &Diff{Path: p, Old: o, New: n}
}
func (d Diff) String() string {
return d.Path
}
func (d Diff) StringVerbose() string {
return fmt.Sprintf("%s (%q != %q)", d.Path, d.Old, d.New)
}
type Diffs []*Diff
func (d Diffs) String() string {
return strings.Join(lo.Map(d, func(x *Diff, _ int) string {
return x.String()
}), "; ")
}
func (d Diffs) Sorted() Diffs {
ret := slices.Clone(d)
slices.SortFunc(ret, func(l *Diff, r *Diff) int {
return cmp.Compare(l.Path, r.Path)
})
return ret
}
func (d Diffs) StringVerbose() string {
return strings.Join(lo.Map(d, func(x *Diff, _ int) string {
return x.StringVerbose()
}), "; ")
}
type DiffsSet map[string]Diffs
func DiffObjects(l any, r any, path ...string) Diffs {
return DiffObjectsIgnoring(l, r, nil, path...)
}
func DiffObjectsIgnoring(l any, r any, ignored []string, path ...string) Diffs {
if len(path) > 0 && lo.Contains(ignored, path[len(path)-1]) {
return nil
}
if l == nil {
return Diffs{NewDiff(strings.Join(path, "."), "", fmt.Sprint(r))}
}
if r == nil {
return Diffs{NewDiff(strings.Join(path, "."), fmt.Sprint(l), "")}
}
if lt, rt := fmt.Sprintf("%T", l), fmt.Sprintf("%T", r); lt != rt {
return Diffs{NewDiff(strings.Join(path, "."), ToJSONCompact(l), ToJSONCompact(r))}
}
return diffType(l, r, ignored, false, path...)
}
func diffType(l any, r any, ignored []string, recursed bool, path ...string) Diffs {
var ret Diffs
switch t := l.(type) {
case ValueMap:
ret = append(ret, diffMaps(t, r, ignored, path...)...)
case map[string]any:
ret = append(ret, diffMaps(t, r, ignored, path...)...)
case map[string]int:
ret = append(ret, diffIntMaps(t, r, ignored, path...)...)
case []any:
ret = append(ret, diffArrays(t, r, ignored, path...)...)
case Diffs:
rm, _ := r.(Diffs)
lo.ForEach(t, func(v *Diff, idx int) {
rv := rm[idx]
ret = append(ret, DiffObjectsIgnoring(v, rv, ignored, append([]string{}, path...)...)...)
})
case int64:
i, _ := r.(int64)
if t != i {
ret = append(ret, NewDiff(strings.Join(path, "."), fmt.Sprint(t), fmt.Sprint(i)))
}
case int:
i, _ := r.(int)
if t != i {
ret = append(ret, NewDiff(strings.Join(path, "."), fmt.Sprint(t), fmt.Sprint(i)))
}
case float64:
i, _ := r.(float64)
if t != i {
ret = append(ret, NewDiff(strings.Join(path, "."), fmt.Sprint(t), fmt.Sprint(i)))
}
case string:
s, _ := r.(string)
if t != s {
ret = append(ret, NewDiff(strings.Join(path, "."), t, s))
}
default:
lj, rj := ToJSONCompact(l), ToJSONCompact(r)
if !recursed && (strings.HasPrefix(lj, "{") || strings.HasPrefix(lj, "[")) {
lx, _ := FromJSONAny([]byte(lj))
rx, _ := FromJSONAny([]byte(rj))
ret = append(ret, diffType(lx, rx, ignored, true, path...)...)
} else if lj != rj {
ret = append(ret, NewDiff(strings.Join(path, "."), lj, rj))
}
}
return ret
}
func diffArrays(l []any, r any, ignored []string, path ...string) Diffs {
var ret Diffs
rm, _ := r.([]any)
lo.ForEach(l, func(v any, idx int) {
if len(rm) > idx {
rv := rm[idx]
ret = append(ret, DiffObjectsIgnoring(v, rv, ignored, append(append([]string{}, path...), fmt.Sprint(idx))...)...)
} else {
ret = append(ret, DiffObjectsIgnoring(v, nil, ignored, append(append([]string{}, path...), fmt.Sprint(idx))...)...)
}
})
if len(rm) > len(l) {
for i := len(l); i < len(rm); i++ {
ret = append(ret, DiffObjectsIgnoring(nil, rm[i], ignored, append(append([]string{}, path...), fmt.Sprint(i))...)...)
}
}
return ret
}
func diffMaps(l map[string]any, r any, ignored []string, path ...string) Diffs {
var ret Diffs
rm, ok := r.(map[string]any)
if !ok {
rm, _ = r.(ValueMap)
}
for k, v := range l {
if lo.Contains(ignored, k) {
continue
}
rv := rm[k]
ret = append(ret, DiffObjectsIgnoring(v, rv, ignored, append(append([]string{}, path...), k)...)...)
}
for k, v := range rm {
if lo.Contains(ignored, k) {
continue
}
if _, exists := l[k]; !exists {
ret = append(ret, DiffObjectsIgnoring(nil, v, ignored, append(append([]string{}, path...), k)...)...)
}
}
return ret
}
func diffIntMaps(l map[string]int, r any, ignored []string, path ...string) Diffs {
var ret Diffs
rm, _ := r.(map[string]int)
for k, v := range l {
if lo.Contains(ignored, k) {
continue
}
rv := rm[k]
ret = append(ret, DiffObjectsIgnoring(v, rv, ignored, append(append([]string{}, path...), k)...)...)
}
for k, v := range rm {
if lo.Contains(ignored, k) {
continue
}
if _, exists := l[k]; !exists {
ret = append(ret, DiffObjectsIgnoring(nil, v, ignored, append(append([]string{}, path...), k)...)...)
}
}
return ret
}