Remove old diffing package

This commit is contained in:
Tobie Morgan Hitchcock 2017-02-03 19:01:57 +00:00
parent ac95aa1bcd
commit 15cb9f7b96
5 changed files with 0 additions and 1887 deletions

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@ -1,247 +0,0 @@
// Copyright © 2016 Abcum Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package json
import (
"encoding/json"
"fmt"
"reflect"
"strings"
)
type Operation struct {
Op string `json:"op"`
Path string `json:"path"`
Value interface{} `json:"value,omitempty"`
}
type ByPath []Operation
func (a ByPath) Len() int { return len(a) }
func (a ByPath) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a ByPath) Less(i, j int) bool { return a[i].Path < a[j].Path }
func NewPatch(op, path string, value interface{}) Operation {
return Operation{Op: op, Path: path, Value: value}
}
// CreatePatch creates a patch as specified in http://jsonpatch.com/
//
// 'a' is original, 'b' is the modified document. Both are to be given as json encoded content.
// The function will return an array of Operations
//
// An error will be returned if any of the two documents are invalid.
func Diff(a, b interface{}) ([]Operation, error) {
va, oka := a.([]byte)
vb, okb := b.([]byte)
if oka && okb {
ia := map[string]interface{}{}
ib := map[string]interface{}{}
err := json.Unmarshal(va, &ia)
if err != nil {
return nil, err
}
err = json.Unmarshal(vb, &ib)
if err != nil {
return nil, err
}
return diff(ia, ib, "", []Operation{})
}
ma, oka := a.(map[string]interface{})
mb, okb := b.(map[string]interface{})
if oka && okb {
return diff(ma, mb, "", []Operation{})
}
return nil, fmt.Errorf("Invalid input format")
}
// Returns true if the values matches (must be json types)
// The types of the values must match, otherwise it will always return false
// If two map[string]interface{} are given, all elements must match.
func matchesValue(av, bv interface{}) bool {
if reflect.TypeOf(av) != reflect.TypeOf(bv) {
return false
}
switch at := av.(type) {
case string:
bt := bv.(string)
if bt == at {
return true
}
case float64:
bt := bv.(float64)
if bt == at {
return true
}
case bool:
bt := bv.(bool)
if bt == at {
return true
}
case map[string]interface{}:
bt := bv.(map[string]interface{})
for key := range at {
if !matchesValue(at[key], bt[key]) {
return false
}
}
for key := range bt {
if !matchesValue(at[key], bt[key]) {
return false
}
}
return true
case []interface{}:
bt := bv.([]interface{})
if len(bt) != len(at) {
return false
}
for key := range at {
if !matchesValue(at[key], bt[key]) {
return false
}
}
for key := range bt {
if !matchesValue(at[key], bt[key]) {
return false
}
}
return true
}
return false
}
func makePath(path string, newPart interface{}) string {
if path == "" {
return fmt.Sprintf("/%v", newPart)
} else {
if strings.HasSuffix(path, "/") {
path = path + fmt.Sprintf("%v", newPart)
} else {
path = path + fmt.Sprintf("/%v", newPart)
}
}
return path
}
// diff returns the (recursive) difference between a and b as an array of Operations.
func diff(a, b map[string]interface{}, path string, patch []Operation) ([]Operation, error) {
for key, bv := range b {
p := makePath(path, key)
av, ok := a[key]
// value was added
if !ok {
patch = append(patch, NewPatch("add", p, bv))
continue
}
// If types have changed, replace completely
if reflect.TypeOf(av) != reflect.TypeOf(bv) {
patch = append(patch, NewPatch("replace", p, bv))
continue
}
// Types are the same, compare values
var err error
patch, err = handleValues(av, bv, p, patch)
if err != nil {
return nil, err
}
}
// Now add all deleted values as nil
for key := range a {
_, found := b[key]
if !found {
p := makePath(path, key)
patch = append(patch, NewPatch("remove", p, nil))
}
}
return patch, nil
}
func handleValues(av, bv interface{}, p string, patch []Operation) ([]Operation, error) {
var err error
switch at := av.(type) {
case map[string]interface{}:
bt := bv.(map[string]interface{})
patch, err = diff(at, bt, p, patch)
if err != nil {
return nil, err
}
case string, float64, bool:
if !matchesValue(av, bv) {
patch = append(patch, NewPatch("replace", p, bv))
}
case []interface{}:
bt := bv.([]interface{})
if len(at) != len(bt) {
// arrays are not the same
patch = append(patch, compareArray(at, bt, p)...)
} else {
for i, _ := range bt {
patch, err = handleValues(at[i], bt[i], makePath(p, i), patch)
if err != nil {
return nil, err
}
}
}
case nil:
switch bv.(type) {
case nil:
// Both nil, fine.
default:
patch = append(patch, NewPatch("add", p, bv))
}
default:
panic(fmt.Sprintf("Unknown type:%T ", av))
}
return patch, nil
}
func compareArray(av, bv []interface{}, p string) []Operation {
retval := []Operation{}
// var err error
for i, v := range av {
found := false
for _, v2 := range bv {
if reflect.DeepEqual(v, v2) {
found = true
}
}
if !found {
retval = append(retval, NewPatch("remove", makePath(p, i), nil))
}
}
for i, v := range bv {
found := false
for _, v2 := range av {
if reflect.DeepEqual(v, v2) {
found = true
}
}
if !found {
retval = append(retval, NewPatch("add", makePath(p, i), v))
}
}
return retval
}

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// Copyright © 2016 Abcum Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package json
/*import (
"encoding/json"
"fmt"
"reflect"
"strings"
)
func merge(cur, patch *lazyNode) *lazyNode {
curDoc, err := cur.intoDoc()
if err != nil {
pruneNulls(patch)
return patch
}
patchDoc, err := patch.intoDoc()
if err != nil {
return patch
}
mergeDocs(curDoc, patchDoc)
return cur
}
func mergeDocs(doc, patch *partialDoc) {
for k, v := range *patch {
k := decodePatchKey(k)
if v == nil {
delete(*doc, k)
} else {
cur, ok := (*doc)[k]
if !ok || cur == nil {
pruneNulls(v)
(*doc)[k] = v
} else {
(*doc)[k] = merge(cur, v)
}
}
}
}
func pruneNulls(n *lazyNode) {
sub, err := n.intoDoc()
if err == nil {
pruneDocNulls(sub)
} else {
ary, err := n.intoAry()
if err == nil {
pruneAryNulls(ary)
}
}
}
func pruneDocNulls(doc *partialDoc) *partialDoc {
for k, v := range *doc {
if v == nil {
delete(*doc, k)
} else {
pruneNulls(v)
}
}
return doc
}
func pruneAryNulls(ary *partialArray) *partialArray {
newAry := []*lazyNode{}
for _, v := range *ary {
if v != nil {
pruneNulls(v)
newAry = append(newAry, v)
}
}
*ary = newAry
return ary
}
var errBadJSONDoc = fmt.Errorf("Invalid JSON Document")
var errBadJSONPatch = fmt.Errorf("Invalid JSON Patch")
// MergePatch merges the patchData into the docData.
func MergePatch(docData, patchData []byte) ([]byte, error) {
doc := &partialDoc{}
docErr := json.Unmarshal(docData, doc)
patch := &partialDoc{}
patchErr := json.Unmarshal(patchData, patch)
if _, ok := docErr.(*json.SyntaxError); ok {
return nil, errBadJSONDoc
}
if _, ok := patchErr.(*json.SyntaxError); ok {
return nil, errBadJSONPatch
}
if docErr == nil && *doc == nil {
return nil, errBadJSONDoc
}
if patchErr == nil && *patch == nil {
return nil, errBadJSONPatch
}
if docErr != nil || patchErr != nil {
// Not an error, just not a doc, so we turn straight into the patch
if patchErr == nil {
doc = pruneDocNulls(patch)
} else {
patchAry := &partialArray{}
patchErr = json.Unmarshal(patchData, patchAry)
if patchErr != nil {
return nil, errBadJSONPatch
}
pruneAryNulls(patchAry)
out, patchErr := json.Marshal(patchAry)
if patchErr != nil {
return nil, errBadJSONPatch
}
return out, nil
}
} else {
mergeDocs(doc, patch)
}
return json.Marshal(doc)
}
// CreateMergePatch creates a merge patch as specified in http://tools.ietf.org/html/draft-ietf-appsawg-json-merge-patch-07
//
// 'a' is original, 'b' is the modified document. Both are to be given as json encoded content.
// The function will return a mergeable json document with differences from a to b.
//
// An error will be returned if any of the two documents are invalid.
func CreateMergePatch(a, b []byte) ([]byte, error) {
aI := map[string]interface{}{}
bI := map[string]interface{}{}
err := json.Unmarshal(a, &aI)
if err != nil {
return nil, errBadJSONDoc
}
err = json.Unmarshal(b, &bI)
if err != nil {
return nil, errBadJSONDoc
}
dest, err := getDiff(aI, bI)
if err != nil {
return nil, err
}
return json.Marshal(dest)
}
// Returns true if the array matches (must be json types).
// As is idiomatic for go, an empty array is not the same as a nil array.
func matchesArray(a, b []interface{}) bool {
if len(a) != len(b) {
return false
}
if (a == nil && b != nil) || (a != nil && b == nil) {
return false
}
for i := range a {
if !matchesValue(a[i], b[i]) {
return false
}
}
return true
}
// Returns true if the values matches (must be json types)
// The types of the values must match, otherwise it will always return false
// If two map[string]interface{} are given, all elements must match.
func matchesValue(av, bv interface{}) bool {
if reflect.TypeOf(av) != reflect.TypeOf(bv) {
return false
}
switch at := av.(type) {
case string:
bt := bv.(string)
if bt == at {
return true
}
case float64:
bt := bv.(float64)
if bt == at {
return true
}
case bool:
bt := bv.(bool)
if bt == at {
return true
}
case map[string]interface{}:
bt := bv.(map[string]interface{})
for key := range at {
if !matchesValue(at[key], bt[key]) {
return false
}
}
for key := range bt {
if !matchesValue(at[key], bt[key]) {
return false
}
}
return true
case []interface{}:
bt := bv.([]interface{})
return matchesArray(at, bt)
}
return false
}
// getDiff returns the (recursive) difference between a and b as a map[string]interface{}.
func getDiff(a, b map[string]interface{}) (map[string]interface{}, error) {
into := map[string]interface{}{}
for key, bv := range b {
escapedKey := encodePatchKey(key)
av, ok := a[key]
// value was added
if !ok {
into[escapedKey] = bv
continue
}
// If types have changed, replace completely
if reflect.TypeOf(av) != reflect.TypeOf(bv) {
into[escapedKey] = bv
continue
}
// Types are the same, compare values
switch at := av.(type) {
case map[string]interface{}:
bt := bv.(map[string]interface{})
dst := make(map[string]interface{}, len(bt))
dst, err := getDiff(at, bt)
if err != nil {
return nil, err
}
if len(dst) > 0 {
into[escapedKey] = dst
}
case string, float64, bool:
if !matchesValue(av, bv) {
into[escapedKey] = bv
}
case []interface{}:
bt := bv.([]interface{})
if !matchesArray(at, bt) {
into[escapedKey] = bv
}
case nil:
switch bv.(type) {
case nil:
// Both nil, fine.
default:
into[escapedKey] = bv
}
default:
panic(fmt.Sprintf("Unknown type:%T in key %s", av, key))
}
}
// Now add all deleted values as nil
for key := range a {
_, found := b[key]
if !found {
into[key] = nil
}
}
return into, nil
}
// From http://tools.ietf.org/html/rfc6901#section-4 :
//
// Evaluation of each reference token begins by decoding any escaped
// character sequence. This is performed by first transforming any
// occurrence of the sequence '~1' to '/', and then transforming any
// occurrence of the sequence '~0' to '~'.
var (
rfc6901Encoder = strings.NewReplacer("~", "~0", "/", "~1")
rfc6901Decoder = strings.NewReplacer("~1", "/", "~0", "~")
)
func decodePatchKey(k string) string {
return rfc6901Decoder.Replace(k)
}
func encodePatchKey(k string) string {
return rfc6901Encoder.Replace(k)
}
*/

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// Copyright © 2016 Abcum Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package json
// import (
// "strings"
// "testing"
// )
// func mergePatch(doc, patch string) string {
// out, err := MergePatch([]byte(doc), []byte(patch))
// if err != nil {
// panic(err)
// }
// return string(out)
// }
// func TestMergePatchReplaceKey(t *testing.T) {
// doc := `{ "title": "hello" }`
// pat := `{ "title": "goodbye" }`
// res := mergePatch(doc, pat)
// if !compareJSON(pat, res) {
// t.Fatalf("Key was not replaced")
// }
// }
// func TestMergePatchIgnoresOtherValues(t *testing.T) {
// doc := `{ "title": "hello", "age": 18 }`
// pat := `{ "title": "goodbye" }`
// res := mergePatch(doc, pat)
// exp := `{ "title": "goodbye", "age": 18 }`
// if !compareJSON(exp, res) {
// t.Fatalf("Key was not replaced")
// }
// }
// func TestMergePatchNilDoc(t *testing.T) {
// doc := `{ "title": null }`
// pat := `{ "title": {"foo": "bar"} }`
// res := mergePatch(doc, pat)
// exp := `{ "title": {"foo": "bar"} }`
// if !compareJSON(exp, res) {
// t.Fatalf("Key was not replaced")
// }
// }
// func TestMergePatchRecursesIntoObjects(t *testing.T) {
// doc := `{ "person": { "title": "hello", "age": 18 } }`
// pat := `{ "person": { "title": "goodbye" } }`
// res := mergePatch(doc, pat)
// exp := `{ "person": { "title": "goodbye", "age": 18 } }`
// if !compareJSON(exp, res) {
// t.Fatalf("Key was not replaced")
// }
// }
// type nonObjectCases struct {
// doc, pat, res string
// }
// func TestMergePatchReplacesNonObjectsWholesale(t *testing.T) {
// a1 := `[1]`
// a2 := `[2]`
// o1 := `{ "a": 1 }`
// o2 := `{ "a": 2 }`
// o3 := `{ "a": 1, "b": 1 }`
// o4 := `{ "a": 2, "b": 1 }`
// cases := []nonObjectCases{
// {a1, a2, a2},
// {o1, a2, a2},
// {a1, o1, o1},
// {o3, o2, o4},
// }
// for _, c := range cases {
// act := mergePatch(c.doc, c.pat)
// if !compareJSON(c.res, act) {
// t.Errorf("whole object replacement failed")
// }
// }
// }
// func TestMergePatchReturnsErrorOnBadJSON(t *testing.T) {
// _, err := MergePatch([]byte(`[[[[`), []byte(`1`))
// if err == nil {
// t.Errorf("Did not return an error for bad json: %s", err)
// }
// _, err = MergePatch([]byte(`1`), []byte(`[[[[`))
// if err == nil {
// t.Errorf("Did not return an error for bad json: %s", err)
// }
// }
// func TestMergePatchReturnsEmptyArrayOnEmptyArray(t *testing.T) {
// doc := `{ "array": ["one", "two"] }`
// pat := `{ "array": [] }`
// exp := `{ "array": [] }`
// res, err := MergePatch([]byte(doc), []byte(pat))
// if err != nil {
// t.Errorf("Unexpected error: %s, %s", err, string(res))
// }
// if !compareJSON(exp, string(res)) {
// t.Fatalf("Emtpy array did not return not return as empty array")
// }
// }
// var rfcTests = []struct {
// target string
// patch string
// expected string
// }{
// // test cases from https://tools.ietf.org/html/rfc7386#appendix-A
// {target: `{"a":"b"}`, patch: `{"a":"c"}`, expected: `{"a":"c"}`},
// {target: `{"a":"b"}`, patch: `{"b":"c"}`, expected: `{"a":"b","b":"c"}`},
// {target: `{"a":"b"}`, patch: `{"a":null}`, expected: `{}`},
// {target: `{"a":"b","b":"c"}`, patch: `{"a":null}`, expected: `{"b":"c"}`},
// {target: `{"a":["b"]}`, patch: `{"a":"c"}`, expected: `{"a":"c"}`},
// {target: `{"a":"c"}`, patch: `{"a":["b"]}`, expected: `{"a":["b"]}`},
// {target: `{"a":{"b": "c"}}`, patch: `{"a": {"b": "d","c": null}}`, expected: `{"a":{"b":"d"}}`},
// {target: `{"a":[{"b":"c"}]}`, patch: `{"a":[1]}`, expected: `{"a":[1]}`},
// {target: `["a","b"]`, patch: `["c","d"]`, expected: `["c","d"]`},
// {target: `{"a":"b"}`, patch: `["c"]`, expected: `["c"]`},
// // {target: `{"a":"foo"}`, patch: `null`, expected: `null`},
// // {target: `{"a":"foo"}`, patch: `"bar"`, expected: `"bar"`},
// {target: `{"e":null}`, patch: `{"a":1}`, expected: `{"a":1,"e":null}`},
// {target: `[1,2]`, patch: `{"a":"b","c":null}`, expected: `{"a":"b"}`},
// {target: `{}`, patch: `{"a":{"bb":{"ccc":null}}}`, expected: `{"a":{"bb":{}}}`},
// }
// func TestMergePatchRFCCases(t *testing.T) {
// for i, c := range rfcTests {
// out := mergePatch(c.target, c.patch)
// if !compareJSON(out, c.expected) {
// t.Errorf("case[%d], patch '%s' did not apply properly to '%s'. expected:\n'%s'\ngot:\n'%s'", i, c.patch, c.target, c.expected, out)
// }
// }
// }
// var rfcFailTests = `
// {"a":"foo"} | null
// {"a":"foo"} | "bar"
// `
// func TestMergePatchFailRFCCases(t *testing.T) {
// tests := strings.Split(rfcFailTests, "\n")
// for _, c := range tests {
// if strings.TrimSpace(c) == "" {
// continue
// }
// parts := strings.SplitN(c, "|", 2)
// doc := strings.TrimSpace(parts[0])
// pat := strings.TrimSpace(parts[1])
// out, err := MergePatch([]byte(doc), []byte(pat))
// if err != errBadJSONPatch {
// t.Errorf("error not returned properly: %s, %s", err, string(out))
// }
// }
// }
// func TestMergeReplaceKey(t *testing.T) {
// doc := `{ "title": "hello", "nested": {"one": 1, "two": 2} }`
// pat := `{ "title": "goodbye", "nested": {"one": 2, "two": 2} }`
// exp := `{ "title": "goodbye", "nested": {"one": 2} }`
// res, err := CreateMergePatch([]byte(doc), []byte(pat))
// if err != nil {
// t.Errorf("Unexpected error: %s, %s", err, string(res))
// }
// if !compareJSON(exp, string(res)) {
// t.Fatalf("Key was not replaced")
// }
// }
// func TestMergeGetArray(t *testing.T) {
// doc := `{ "title": "hello", "array": ["one", "two"], "notmatch": [1, 2, 3] }`
// pat := `{ "title": "hello", "array": ["one", "two", "three"], "notmatch": [1, 2, 3] }`
// exp := `{ "array": ["one", "two", "three"] }`
// res, err := CreateMergePatch([]byte(doc), []byte(pat))
// if err != nil {
// t.Errorf("Unexpected error: %s, %s", err, string(res))
// }
// if !compareJSON(exp, string(res)) {
// t.Fatalf("Array was not added")
// }
// }
// func TestMergeGetObjArray(t *testing.T) {
// doc := `{ "title": "hello", "array": [{"banana": true}, {"evil": false}], "notmatch": [{"one":1}, {"two":2}, {"three":3}] }`
// pat := `{ "title": "hello", "array": [{"banana": false}, {"evil": true}], "notmatch": [{"one":1}, {"two":2}, {"three":3}] }`
// exp := `{ "array": [{"banana": false}, {"evil": true}] }`
// res, err := CreateMergePatch([]byte(doc), []byte(pat))
// if err != nil {
// t.Errorf("Unexpected error: %s, %s", err, string(res))
// }
// if !compareJSON(exp, string(res)) {
// t.Fatalf("Object array was not added")
// }
// }
// func TestMergeDeleteKey(t *testing.T) {
// doc := `{ "title": "hello", "nested": {"one": 1, "two": 2} }`
// pat := `{ "title": "hello", "nested": {"one": 1} }`
// exp := `{"nested":{"two":null}}`
// res, err := CreateMergePatch([]byte(doc), []byte(pat))
// if err != nil {
// t.Errorf("Unexpected error: %s, %s", err, string(res))
// }
// // We cannot use "compareJSON", since Equals does not report a difference if the value is null
// if exp != string(res) {
// t.Fatalf("Key was not removed")
// }
// }
// func TestMergeEmptyArray(t *testing.T) {
// doc := `{ "array": null }`
// pat := `{ "array": [] }`
// exp := `{"array":[]}`
// res, err := CreateMergePatch([]byte(doc), []byte(pat))
// if err != nil {
// t.Errorf("Unexpected error: %s, %s", err, string(res))
// }
// // We cannot use "compareJSON", since Equals does not report a difference if the value is null
// if exp != string(res) {
// t.Fatalf("Key was not removed")
// }
// }
// func TestMergeObjArray(t *testing.T) {
// doc := `{ "array": [ {"a": {"b": 2}}, {"a": {"b": 3}} ]}`
// exp := `{}`
// res, err := CreateMergePatch([]byte(doc), []byte(doc))
// if err != nil {
// t.Errorf("Unexpected error: %s, %s", err, string(res))
// }
// // We cannot use "compareJSON", since Equals does not report a difference if the value is null
// if exp != string(res) {
// t.Fatalf("Array was not empty, was " + string(res))
// }
// }
// func TestMergeComplexMatch(t *testing.T) {
// doc := `{"hello": "world","t": true ,"f": false, "n": null,"i": 123,"pi": 3.1416,"a": [1, 2, 3, 4], "nested": {"hello": "world","t": true ,"f": false, "n": null,"i": 123,"pi": 3.1416,"a": [1, 2, 3, 4]} }`
// empty := `{}`
// res, err := CreateMergePatch([]byte(doc), []byte(doc))
// if err != nil {
// t.Errorf("Unexpected error: %s, %s", err, string(res))
// }
// // We cannot use "compareJSON", since Equals does not report a difference if the value is null
// if empty != string(res) {
// t.Fatalf("Did not get empty result, was:%s", string(res))
// }
// }
// func TestMergeComplexAddAll(t *testing.T) {
// doc := `{"hello": "world","t": true ,"f": false, "n": null,"i": 123,"pi": 3.1416,"a": [1, 2, 3, 4], "nested": {"hello": "world","t": true ,"f": false, "n": null,"i": 123,"pi": 3.1416,"a": [1, 2, 3, 4]} }`
// empty := `{}`
// res, err := CreateMergePatch([]byte(empty), []byte(doc))
// if err != nil {
// t.Errorf("Unexpected error: %s, %s", err, string(res))
// }
// if !compareJSON(doc, string(res)) {
// t.Fatalf("Did not get everything as, it was:\n%s", string(res))
// }
// }
// func TestMergeComplexRemoveAll(t *testing.T) {
// doc := `{"hello": "world","t": true ,"f": false, "n": null,"i": 123,"pi": 3.1416,"a": [1, 2, 3, 4], "nested": {"hello": "world","t": true ,"f": false, "n": null,"i": 123,"pi": 3.1416,"a": [1, 2, 3, 4]} }`
// exp := `{"a":null,"f":null,"hello":null,"i":null,"n":null,"nested":null,"pi":null,"t":null}`
// empty := `{}`
// res, err := CreateMergePatch([]byte(doc), []byte(empty))
// if err != nil {
// t.Errorf("Unexpected error: %s, %s", err, string(res))
// }
// if exp != string(res) {
// t.Fatalf("Did not get result, was:%s", string(res))
// }
// // FIXME: Crashes if using compareJSON like this:
// /*
// if !compareJSON(doc, string(res)) {
// t.Fatalf("Did not get everything as, it was:\n%s", string(res))
// }
// */
// }
// func TestMergeObjectWithInnerArray(t *testing.T) {
// stateString := `{
// "OuterArray": [
// {
// "InnerArray": [
// {
// "StringAttr": "abc123"
// }
// ],
// "StringAttr": "def456"
// }
// ]
// }`
// patch, err := CreateMergePatch([]byte(stateString), []byte(stateString))
// if err != nil {
// t.Fatal(err)
// }
// if string(patch) != "{}" {
// t.Fatalf("Patch should have been {} but was: %v", string(patch))
// }
// }
// func TestMergeReplaceKeyRequiringEscape(t *testing.T) {
// doc := `{ "title": "hello", "nested": {"title/escaped": 1, "two": 2} }`
// pat := `{ "title": "goodbye", "nested": {"title/escaped": 2, "two": 2} }`
// exp := `{ "title": "goodbye", "nested": {"title~1escaped": 2} }`
// res, err := CreateMergePatch([]byte(doc), []byte(pat))
// if err != nil {
// t.Errorf("Unexpected error: %s, %s", err, string(res))
// }
// if !compareJSON(exp, string(res)) {
// t.Log(string(res))
// t.Fatalf("Key was not replaced")
// }
// }
// func TestMergePatchReplaceKeyRequiringEscaping(t *testing.T) {
// doc := `{ "obj": { "title/escaped": "hello" } }`
// pat := `{ "obj": { "title~1escaped": "goodbye" } }`
// exp := `{ "obj": { "title/escaped": "goodbye" } }`
// res := mergePatch(doc, pat)
// if !compareJSON(exp, res) {
// t.Fatalf("Key was not replaced")
// }
// }

View file

@ -1,601 +0,0 @@
// Copyright © 2016 Abcum Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package json
/*import (
"bytes"
"encoding/json"
"fmt"
"strconv"
"strings"
)
const (
eRaw = iota
eDoc
eAry
)
const LeftBrace byte = 91 // []byte("[")
type lazyNode struct {
raw *json.RawMessage
doc partialDoc
ary partialArray
which int
}
type operation map[string]*json.RawMessage
// Patch is an ordered collection of operations.
type Patch []operation
type partialDoc map[string]*lazyNode
type partialArray []*lazyNode
type container interface {
get(key string) (*lazyNode, error)
set(key string, val *lazyNode) error
add(key string, val *lazyNode) error
remove(key string) error
}
func newLazyNode(raw *json.RawMessage) *lazyNode {
return &lazyNode{raw: raw, doc: nil, ary: nil, which: eRaw}
}
func (n *lazyNode) MarshalJSON() ([]byte, error) {
switch n.which {
case eRaw:
return json.Marshal(n.raw)
case eDoc:
return json.Marshal(n.doc)
case eAry:
return json.Marshal(n.ary)
default:
return nil, fmt.Errorf("Unknown type")
}
}
func (n *lazyNode) UnmarshalJSON(data []byte) error {
dest := make(json.RawMessage, len(data))
copy(dest, data)
n.raw = &dest
n.which = eRaw
return nil
}
func (n *lazyNode) intoDoc() (*partialDoc, error) {
if n.which == eDoc {
return &n.doc, nil
}
err := json.Unmarshal(*n.raw, &n.doc)
if err != nil {
return nil, err
}
n.which = eDoc
return &n.doc, nil
}
func (n *lazyNode) intoAry() (*partialArray, error) {
if n.which == eAry {
return &n.ary, nil
}
err := json.Unmarshal(*n.raw, &n.ary)
if err != nil {
return nil, err
}
n.which = eAry
return &n.ary, nil
}
func (n *lazyNode) compact() []byte {
buf := &bytes.Buffer{}
err := json.Compact(buf, *n.raw)
if err != nil {
return *n.raw
}
return buf.Bytes()
}
func (n *lazyNode) tryDoc() bool {
err := json.Unmarshal(*n.raw, &n.doc)
if err != nil {
return false
}
n.which = eDoc
return true
}
func (n *lazyNode) tryAry() bool {
err := json.Unmarshal(*n.raw, &n.ary)
if err != nil {
return false
}
n.which = eAry
return true
}
func (n *lazyNode) equal(o *lazyNode) bool {
if n.which == eRaw {
if !n.tryDoc() && !n.tryAry() {
if o.which != eRaw {
return false
}
return bytes.Equal(n.compact(), o.compact())
}
}
if n.which == eDoc {
if o.which == eRaw {
if !o.tryDoc() {
return false
}
}
if o.which != eDoc {
return false
}
for k, v := range n.doc {
ov, ok := o.doc[k]
if !ok {
return false
}
if v == nil && ov == nil {
continue
}
if !v.equal(ov) {
return false
}
}
return true
}
if o.which != eAry && !o.tryAry() {
return false
}
if len(n.ary) != len(o.ary) {
return false
}
for idx, val := range n.ary {
if !val.equal(o.ary[idx]) {
return false
}
}
return true
}
func (o operation) kind() string {
if obj, ok := o["op"]; ok {
var op string
err := json.Unmarshal(*obj, &op)
if err != nil {
return "unknown"
}
return op
}
return "unknown"
}
func (o operation) path() string {
if obj, ok := o["path"]; ok {
var op string
err := json.Unmarshal(*obj, &op)
if err != nil {
return "unknown"
}
return op
}
return "unknown"
}
func (o operation) from() string {
if obj, ok := o["from"]; ok {
var op string
err := json.Unmarshal(*obj, &op)
if err != nil {
return "unknown"
}
return op
}
return "unknown"
}
func (o operation) value() *lazyNode {
if obj, ok := o["value"]; ok {
return newLazyNode(obj)
}
return nil
}
func isArray(buf []byte) bool {
Loop:
for _, c := range buf {
switch c {
case ' ':
case '\n':
case '\t':
continue
case '[':
return true
default:
break Loop
}
}
return false
}
func findObject(pd *container, path string) (container, string) {
doc := *pd
split := strings.Split(path, "/")
parts := split[1 : len(split)-1]
key := split[len(split)-1]
var err error
for _, part := range parts {
next, ok := doc.get(decodePatchKey(part))
if next == nil || ok != nil {
return nil, ""
}
if isArray(*next.raw) {
doc, err = next.intoAry()
if err != nil {
return nil, ""
}
} else {
doc, err = next.intoDoc()
if err != nil {
return nil, ""
}
}
}
return doc, decodePatchKey(key)
}
func (d *partialDoc) set(key string, val *lazyNode) error {
(*d)[key] = val
return nil
}
func (d *partialDoc) add(key string, val *lazyNode) error {
(*d)[key] = val
return nil
}
func (d *partialDoc) get(key string) (*lazyNode, error) {
return (*d)[key], nil
}
func (d *partialDoc) remove(key string) error {
_, ok := (*d)[key]
if !ok {
return fmt.Errorf("Unable to remove nonexistent key: %s", key)
}
delete(*d, key)
return nil
}
func (d *partialArray) set(key string, val *lazyNode) error {
if key == "-" {
*d = append(*d, val)
return nil
}
idx, err := strconv.Atoi(key)
if err != nil {
return err
}
sz := len(*d)
if idx+1 > sz {
sz = idx + 1
}
ary := make([]*lazyNode, sz)
cur := *d
copy(ary, cur)
if idx >= len(ary) {
return fmt.Errorf("Unable to access invalid index: %d", idx)
}
ary[idx] = val
*d = ary
return nil
}
func (d *partialArray) add(key string, val *lazyNode) error {
if key == "-" {
*d = append(*d, val)
return nil
}
idx, err := strconv.Atoi(key)
if err != nil {
return err
}
ary := make([]*lazyNode, len(*d)+1)
cur := *d
copy(ary[0:idx], cur[0:idx])
ary[idx] = val
copy(ary[idx+1:], cur[idx:])
*d = ary
return nil
}
func (d *partialArray) get(key string) (*lazyNode, error) {
idx, err := strconv.Atoi(key)
if err != nil {
return nil, err
}
if idx >= len(*d) {
return nil, fmt.Errorf("Unable to access invalid index: %d", idx)
}
return (*d)[idx], nil
}
func (d *partialArray) remove(key string) error {
idx, err := strconv.Atoi(key)
if err != nil {
return err
}
cur := *d
if idx >= len(cur) {
return fmt.Errorf("Unable to remove invalid index: %d", idx)
}
ary := make([]*lazyNode, len(cur)-1)
copy(ary[0:idx], cur[0:idx])
copy(ary[idx:], cur[idx+1:])
*d = ary
return nil
}
func (p Patch) add(doc *container, op operation) error {
path := op.path()
con, key := findObject(doc, path)
if con == nil {
return fmt.Errorf("jsonpatch add operation does not apply: doc is missing path: %s", path)
}
return con.add(key, op.value())
}
func (p Patch) remove(doc *container, op operation) error {
path := op.path()
con, key := findObject(doc, path)
if con == nil {
return fmt.Errorf("jsonpatch remove operation does not apply: doc is missing path: %s", path)
}
return con.remove(key)
}
func (p Patch) replace(doc *container, op operation) error {
path := op.path()
con, key := findObject(doc, path)
if con == nil {
return fmt.Errorf("jsonpatch replace operation does not apply: doc is missing path: %s", path)
}
return con.set(key, op.value())
}
func (p Patch) move(doc *container, op operation) error {
from := op.from()
con, key := findObject(doc, from)
if con == nil {
return fmt.Errorf("jsonpatch move operation does not apply: doc is missing from path: %s", from)
}
val, err := con.get(key)
if err != nil {
return err
}
err = con.remove(key)
if err != nil {
return err
}
path := op.path()
con, key = findObject(doc, path)
if con == nil {
return fmt.Errorf("jsonpatch move operation does not apply: doc is missing destination path: %s", path)
}
return con.set(key, val)
}
func (p Patch) test(doc *container, op operation) error {
path := op.path()
con, key := findObject(doc, path)
if con == nil {
return fmt.Errorf("jsonpatch test operation does not apply: is missing path: %s", path)
}
val, err := con.get(key)
if err != nil {
return err
}
if val == nil {
if op.value().raw == nil {
return nil
} else {
return fmt.Errorf("Testing value %s failed", path)
}
}
if val.equal(op.value()) {
return nil
}
return fmt.Errorf("Testing value %s failed", path)
}
// Equal indicates if 2 JSON documents have the same structural equality.
func Equal(a, b []byte) bool {
ra := make(json.RawMessage, len(a))
copy(ra, a)
la := newLazyNode(&ra)
rb := make(json.RawMessage, len(b))
copy(rb, b)
lb := newLazyNode(&rb)
return la.equal(lb)
}
// DecodePatch decodes the passed JSON document as an RFC 6902 patch.
func DecodePatch(buf []byte) (Patch, error) {
var p Patch
err := json.Unmarshal(buf, &p)
if err != nil {
return nil, err
}
return p, nil
}
// Apply mutates a JSON document according to the patch, and returns the new
// document.
func (p Patch) Apply(doc []byte) ([]byte, error) {
return p.ApplyIndent(doc, "")
}
// ApplyIndent mutates a JSON document according to the patch, and returns the new
// document indented.
func (p Patch) ApplyIndent(doc []byte, indent string) ([]byte, error) {
var pd container
if doc[0] == LeftBrace {
pd = &partialArray{}
} else {
pd = &partialDoc{}
}
err := json.Unmarshal(doc, pd)
if err != nil {
return nil, err
}
err = nil
for _, op := range p {
switch op.kind() {
case "add":
err = p.add(&pd, op)
case "remove":
err = p.remove(&pd, op)
case "replace":
err = p.replace(&pd, op)
case "move":
err = p.move(&pd, op)
case "test":
err = p.test(&pd, op)
default:
err = fmt.Errorf("Unexpected kind: %s", op.kind())
}
if err != nil {
return nil, err
}
}
if indent != "" {
return json.MarshalIndent(pd, "", indent)
}
return json.Marshal(pd)
}
*/

View file

@ -1,311 +0,0 @@
// Copyright © 2016 Abcum Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package json
// import (
// "bytes"
// "encoding/json"
// "fmt"
// "reflect"
// "testing"
// )
// func reformatJSON(j string) string {
// buf := new(bytes.Buffer)
// json.Indent(buf, []byte(j), "", " ")
// return buf.String()
// }
// func compareJSON(a, b string) bool {
// // return Equal([]byte(a), []byte(b))
// var obj_a, obj_b map[string]interface{}
// json.Unmarshal([]byte(a), &obj_a)
// json.Unmarshal([]byte(b), &obj_b)
// // fmt.Printf("Comparing %#v\nagainst %#v\n", obj_a, obj_b)
// return reflect.DeepEqual(obj_a, obj_b)
// }
// func applyPatch(doc, patch string) (string, error) {
// obj, err := DecodePatch([]byte(patch))
// if err != nil {
// panic(err)
// }
// out, err := obj.Apply([]byte(doc))
// if err != nil {
// return "", err
// }
// return string(out), nil
// }
// type Case struct {
// doc, patch, result string
// }
// var Cases = []Case{
// {
// `{ "foo": "bar"}`,
// `[
// { "op": "add", "path": "/baz", "value": "qux" }
// ]`,
// `{
// "baz": "qux",
// "foo": "bar"
// }`,
// },
// {
// `{ "foo": [ "bar", "baz" ] }`,
// `[
// { "op": "add", "path": "/foo/1", "value": "qux" }
// ]`,
// `{ "foo": [ "bar", "qux", "baz" ] }`,
// },
// {
// `{ "baz": "qux", "foo": "bar" }`,
// `[ { "op": "remove", "path": "/baz" } ]`,
// `{ "foo": "bar" }`,
// },
// {
// `{ "foo": [ "bar", "qux", "baz" ] }`,
// `[ { "op": "remove", "path": "/foo/1" } ]`,
// `{ "foo": [ "bar", "baz" ] }`,
// },
// {
// `{ "baz": "qux", "foo": "bar" }`,
// `[ { "op": "replace", "path": "/baz", "value": "boo" } ]`,
// `{ "baz": "boo", "foo": "bar" }`,
// },
// {
// `{
// "foo": {
// "bar": "baz",
// "waldo": "fred"
// },
// "qux": {
// "corge": "grault"
// }
// }`,
// `[ { "op": "move", "from": "/foo/waldo", "path": "/qux/thud" } ]`,
// `{
// "foo": {
// "bar": "baz"
// },
// "qux": {
// "corge": "grault",
// "thud": "fred"
// }
// }`,
// },
// {
// `{ "foo": [ "all", "grass", "cows", "eat" ] }`,
// `[ { "op": "move", "from": "/foo/1", "path": "/foo/3" } ]`,
// `{ "foo": [ "all", "cows", "eat", "grass" ] }`,
// },
// {
// `{ "foo": "bar" }`,
// `[ { "op": "add", "path": "/child", "value": { "grandchild": { } } } ]`,
// `{ "foo": "bar", "child": { "grandchild": { } } }`,
// },
// {
// `{ "foo": ["bar"] }`,
// `[ { "op": "add", "path": "/foo/-", "value": ["abc", "def"] } ]`,
// `{ "foo": ["bar", ["abc", "def"]] }`,
// },
// {
// `{ "foo": "bar", "qux": { "baz": 1, "bar": null } }`,
// `[ { "op": "remove", "path": "/qux/bar" } ]`,
// `{ "foo": "bar", "qux": { "baz": 1 } }`,
// },
// {
// `{ "foo": "bar" }`,
// `[ { "op": "add", "path": "/baz", "value": null } ]`,
// `{ "baz": null, "foo": "bar" }`,
// },
// {
// `{ "foo": ["bar"]}`,
// `[ { "op": "replace", "path": "/foo/0", "value": "baz"}]`,
// `{ "foo": ["baz"]}`,
// },
// {
// `{ "foo": ["bar","baz"]}`,
// `[ { "op": "replace", "path": "/foo/0", "value": "bum"}]`,
// `{ "foo": ["bum","baz"]}`,
// },
// {
// `{ "foo": ["bar","qux","baz"]}`,
// `[ { "op": "replace", "path": "/foo/1", "value": "bum"}]`,
// `{ "foo": ["bar", "bum","baz"]}`,
// },
// {
// `[ {"foo": ["bar","qux","baz"]}]`,
// `[ { "op": "replace", "path": "/0/foo/0", "value": "bum"}]`,
// `[ {"foo": ["bum","qux","baz"]}]`,
// },
// }
// type BadCase struct {
// doc, patch string
// }
// var MutationTestCases = []BadCase{
// {
// `{ "foo": "bar", "qux": { "baz": 1, "bar": null } }`,
// `[ { "op": "remove", "path": "/qux/bar" } ]`,
// },
// {
// `{ "foo": "bar", "qux": { "baz": 1, "bar": null } }`,
// `[ { "op": "replace", "path": "/qux/baz", "value": null } ]`,
// },
// }
// var BadCases = []BadCase{
// {
// `{ "foo": "bar" }`,
// `[ { "op": "add", "path": "/baz/bat", "value": "qux" } ]`,
// },
// {
// `{ "a": { "b": { "d": 1 } } }`,
// `[ { "op": "remove", "path": "/a/b/c" } ]`,
// },
// {
// `{ "a": { "b": { "d": 1 } } }`,
// `[ { "op": "move", "from": "/a/b/c", "path": "/a/b/e" } ]`,
// },
// {
// `{ "a": { "b": [1] } }`,
// `[ { "op": "remove", "path": "/a/b/1" } ]`,
// },
// {
// `{ "a": { "b": [1] } }`,
// `[ { "op": "move", "from": "/a/b/1", "path": "/a/b/2" } ]`,
// },
// }
// func TestAllCases(t *testing.T) {
// for _, c := range Cases {
// out, err := applyPatch(c.doc, c.patch)
// if err != nil {
// t.Errorf("Unable to apply patch: %s", err)
// }
// if !compareJSON(out, c.result) {
// t.Errorf("Patch did not apply. Expected:\n%s\n\nActual:\n%s",
// reformatJSON(c.result), reformatJSON(out))
// }
// }
// for _, c := range MutationTestCases {
// out, err := applyPatch(c.doc, c.patch)
// if err != nil {
// t.Errorf("Unable to apply patch: %s", err)
// }
// if compareJSON(out, c.doc) {
// t.Errorf("Patch did not apply. Original:\n%s\n\nPatched:\n%s",
// reformatJSON(c.doc), reformatJSON(out))
// }
// }
// for _, c := range BadCases {
// _, err := applyPatch(c.doc, c.patch)
// if err == nil {
// t.Errorf("Patch should have failed to apply but it did not")
// }
// }
// }
// type TestCase struct {
// doc, patch string
// result bool
// failedPath string
// }
// var TestCases = []TestCase{
// {
// `{
// "baz": "qux",
// "foo": [ "a", 2, "c" ]
// }`,
// `[
// { "op": "test", "path": "/baz", "value": "qux" },
// { "op": "test", "path": "/foo/1", "value": 2 }
// ]`,
// true,
// "",
// },
// {
// `{ "baz": "qux" }`,
// `[ { "op": "test", "path": "/baz", "value": "bar" } ]`,
// false,
// "/baz",
// },
// {
// `{
// "baz": "qux",
// "foo": ["a", 2, "c"]
// }`,
// `[
// { "op": "test", "path": "/baz", "value": "qux" },
// { "op": "test", "path": "/foo/1", "value": "c" }
// ]`,
// false,
// "/foo/1",
// },
// {
// `{ "baz": "qux" }`,
// `[ { "op": "test", "path": "/foo", "value": 42 } ]`,
// false,
// "/foo",
// },
// {
// `{ "baz": "qux" }`,
// `[ { "op": "test", "path": "/foo", "value": null } ]`,
// true,
// "",
// },
// {
// `{ "baz/foo": "qux" }`,
// `[ { "op": "test", "path": "/baz~1foo", "value": "qux"} ]`,
// true,
// "",
// },
// }
// func TestAllTest(t *testing.T) {
// for _, c := range TestCases {
// _, err := applyPatch(c.doc, c.patch)
// if c.result && err != nil {
// t.Errorf("Testing failed when it should have passed: %s", err)
// } else if !c.result && err == nil {
// t.Errorf("Testing passed when it should have faild: %s", err)
// } else if !c.result {
// expected := fmt.Sprintf("Testing value %s failed", c.failedPath)
// if err.Error() != expected {
// t.Errorf("Testing failed as expected but invalid message: expected [%s], got [%s]", expected, err)
// }
// }
// }
// }