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enum_diff.go
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78 lines (60 loc) · 1.53 KB
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package diff
import (
"reflect"
"slices"
)
// EnumDiff describes the changes between a pair of enums
type EnumDiff struct {
EnumAdded bool `json:"enumAdded,omitempty" yaml:"enumAdded,omitempty"`
EnumDeleted bool `json:"enumDeleted,omitempty" yaml:"enumDeleted,omitempty"`
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 []any
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 getEnumDiff(enum1, enum2 EnumValues) *EnumDiff {
diff := getEnumDiffInternal(enum1, enum2)
if diff.Empty() {
return nil
}
return diff
}
func getEnumDiffInternal(enum1, enum2 EnumValues) *EnumDiff {
diff := newEnumDiff()
if enum1 == nil && enum2 != nil {
diff.EnumAdded = true
}
if enum1 != nil && enum2 == nil {
diff.EnumDeleted = true
}
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 any, enum EnumValues) bool {
return slices.ContainsFunc(enum, func(other any) bool {
return reflect.DeepEqual(value, other)
})
}