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added dcomprasion pkg which allows to get deep difference of maps
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| /* | ||
| Copyright 2023. | ||
| 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 dcomparison provides a solution for deeply comparing two maps, | ||
| // including their nested maps and slices. It is designed to identify differences | ||
| // between two maps that can contain a variety of data types, such as strings, | ||
| // integers, other maps, and slices. | ||
| package dcomparison | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "reflect" | ||
| ) | ||
|
|
||
| // ObjectDiff stores the path to a value and the differing values from two maps. | ||
| type ObjectDiff struct { | ||
| Field string | ||
| Value1 any | ||
| Value2 any | ||
| } | ||
|
|
||
| // ObjectDiffs is a slice of ObjectDiff | ||
| type ObjectDiffs []ObjectDiff | ||
|
|
||
| func (o *ObjectDiffs) Append(diff ObjectDiff) { | ||
| *o = append(*o, diff) | ||
| } | ||
|
|
||
| // compare recursively compares values and populates diffs. | ||
| func compare(path string, value1, value2 any, diffs *ObjectDiffs) { | ||
| if reflect.DeepEqual(value1, value2) { | ||
| return | ||
| } | ||
|
|
||
| v1Type := reflect.TypeOf(value1) | ||
| v2Type := reflect.TypeOf(value2) | ||
|
|
||
| if v1Type == v2Type && v1Type != nil { | ||
| switch v1Type.Kind() { | ||
| case reflect.Map: | ||
| map1 := reflect.ValueOf(value1) | ||
| map2 := reflect.ValueOf(value2) | ||
|
|
||
| for _, key := range map1.MapKeys() { | ||
| currentField := fmt.Sprintf("%s.%v", path, key) | ||
|
|
||
| map1Value := map1.MapIndex(key) | ||
| map2Value := map2.MapIndex(key) | ||
| if map2Value.IsValid() { | ||
| compare(currentField, map1Value.Interface(), map2Value.Interface(), diffs) | ||
| } else { | ||
| diffs.Append(ObjectDiff{ | ||
| Field: currentField, | ||
| Value1: map1Value.Interface(), | ||
| Value2: nil, | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| for _, key := range map2.MapKeys() { | ||
| if !map1.MapIndex(key).IsValid() { | ||
| subPath := fmt.Sprintf("%s.%v", path, key) | ||
| diffs.Append(ObjectDiff{ | ||
| Field: subPath, | ||
| Value1: nil, | ||
| Value2: map2.MapIndex(key).Interface(), | ||
| }) | ||
| } | ||
| } | ||
| case reflect.Slice: | ||
| slice1 := reflect.ValueOf(value1) | ||
| slice2 := reflect.ValueOf(value2) | ||
| maxLength := max(slice1.Len(), slice2.Len()) | ||
|
|
||
| for i := 0; i < maxLength; i++ { | ||
| elem1, elem2 := getSliceElement(slice1, i), getSliceElement(slice2, i) | ||
| subPath := fmt.Sprintf("%s[%d]", path, i) | ||
| compare(subPath, elem1, elem2, diffs) | ||
| } | ||
| default: | ||
| diffs.Append(ObjectDiff{ | ||
| Field: path, | ||
| Value1: value1, | ||
| Value2: value2, | ||
| }) | ||
| } | ||
| } else { | ||
| diffs.Append(ObjectDiff{ | ||
| Field: path, | ||
| Value1: value1, | ||
| Value2: value2, | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| // getSliceElement safely gets the element at index i from a reflect.Value of a slice. | ||
| func getSliceElement(slice reflect.Value, i int) any { | ||
| if i < slice.Len() { | ||
| return slice.Index(i).Interface() | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // max returns the maximum of two integers. | ||
| func max(a, b int) int { | ||
| if a > b { | ||
| return a | ||
| } | ||
| return b | ||
| } | ||
|
|
||
| // MapsDiff compares two maps and returns a slice of ObjectDiff with the differences. | ||
| func MapsDiff(path string, map1, map2 map[string]any) ObjectDiffs { | ||
| var diffs ObjectDiffs | ||
| compare(path, map1, map2, &diffs) | ||
| return diffs | ||
| } |
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