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links_diff.go
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/
links_diff.go
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package diff
import (
"fmt"
"github.com/rjmohammad/kin-openapi/openapi3"
)
// LinksDiff describes the changes between a pair of sets of link objects: https://swagger.io/specification/#link-object
type LinksDiff struct {
Added StringList `json:"added,omitempty" yaml:"added,omitempty"`
Deleted StringList `json:"deleted,omitempty" yaml:"deleted,omitempty"`
Modified ModifiedLinks `json:"modified,omitempty" yaml:"modified,omitempty"`
}
// Empty indicates whether a change was found in this element
func (diff *LinksDiff) Empty() bool {
if diff == nil {
return true
}
return len(diff.Added) == 0 &&
len(diff.Deleted) == 0 &&
len(diff.Modified) == 0
}
// ModifiedLinks is map of link values to their respective diffs
type ModifiedLinks map[string]*LinkDiff
func newLinksDiff() *LinksDiff {
return &LinksDiff{
Added: StringList{},
Deleted: StringList{},
Modified: ModifiedLinks{},
}
}
func getLinksDiff(config *Config, state *state, links1, links2 openapi3.Links) (*LinksDiff, error) {
diff, err := getLinksDiffsInternal(config, state, links1, links2)
if err != nil {
return nil, err
}
if diff.Empty() {
return nil, nil
}
return diff, nil
}
func getLinksDiffsInternal(config *Config, state *state, links1, links2 openapi3.Links) (*LinksDiff, error) {
result := newLinksDiff()
for name1, ref1 := range links1 {
if ref2, ok := links2[name1]; ok {
value1, err := derefLink(ref1)
if err != nil {
return nil, err
}
value2, err := derefLink(ref2)
if err != nil {
return nil, err
}
diff, err := getLinkDiff(config, state, value1, value2)
if err != nil {
return nil, err
}
if !diff.Empty() {
result.Modified[name1] = diff
}
} else {
result.Deleted = append(result.Deleted, name1)
}
}
for name2 := range links2 {
if _, ok := links1[name2]; !ok {
result.Added = append(result.Added, name2)
}
}
return result, nil
}
func derefLink(ref *openapi3.LinkRef) (*openapi3.Link, error) {
if ref == nil || ref.Value == nil {
return nil, fmt.Errorf("link reference is nil")
}
return ref.Value, nil
}
func (diff *LinksDiff) getSummary() *SummaryDetails {
return &SummaryDetails{
Added: len(diff.Added),
Deleted: len(diff.Deleted),
Modified: len(diff.Modified),
}
}