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enum_diff.go
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enum_diff.go
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package diff
import (
"reflect"
)
// EnumDiff describes the changes between a pair of enums
type EnumDiff struct {
Added EnumValues `json:"added,omitempty" yaml:"added,omitempty"`
Deleted EnumValues `json:"deleted,omitempty" yaml:"deleted,omitempty"`
}
// EnumValues is a list of enum values
type EnumValues []interface{}
func newEnumDiff() *EnumDiff {
return &EnumDiff{
Added: EnumValues{},
Deleted: EnumValues{},
}
}
// Empty indicates whether a change was found in this element
func (enumDiff *EnumDiff) Empty() bool {
if enumDiff == nil {
return true
}
return len(enumDiff.Added) == 0 &&
len(enumDiff.Deleted) == 0
}
func (enumDiff *EnumDiff) removeNonBreaking() {
if enumDiff.Empty() {
return
}
enumDiff.Added = nil
}
func getEnumDiff(config *Config, state *state, enum1, enum2 EnumValues) *EnumDiff {
diff := getEnumDiffInternal(enum1, enum2)
if config.BreakingOnly {
diff.removeNonBreaking()
}
if diff.Empty() {
return nil
}
return diff
}
func getEnumDiffInternal(enum1, enum2 EnumValues) *EnumDiff {
diff := newEnumDiff()
for _, v1 := range enum1 {
if !findValue(v1, enum2) {
diff.Deleted = append(diff.Deleted, v1)
}
}
for _, v2 := range enum2 {
if !findValue(v2, enum1) {
diff.Added = append(diff.Added, v2)
}
}
return diff
}
func findValue(value interface{}, enum EnumValues) bool {
for _, other := range enum {
if reflect.DeepEqual(value, other) {
return true
}
}
return false
}
// Patch applies the patch to an enum
func (enumDiff *EnumDiff) Patch(enum *[]interface{}) {
if enumDiff.Empty() {
return
}
result := []interface{}{}
for _, value := range *enum {
if !findValue(value, enumDiff.Deleted) {
result = append(result, value)
}
}
for _, value := range enumDiff.Added {
result = append(result, value)
}
*enum = result
}