feat: Add GetDestinationNamesForSource

Author: yevgenypats

go.mod

@@ -16,6 +16,7 @@ require (
 	github.com/davecgh/go-spew v1.1.0 // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	golang.org/x/exp v0.0.0-20230425010034-47ecfdc1ba53 // indirect
 	golang.org/x/net v0.8.0 // indirect
 	golang.org/x/sys v0.6.0 // indirect
 	golang.org/x/text v0.8.0 // indirect

go.sum

@@ -15,6 +15,8 @@ github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJy
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/thoas/go-funk v0.9.3 h1:7+nAEx3kn5ZJcnDm2Bh23N2yOtweO14bi//dvRtgLpw=
 github.com/thoas/go-funk v0.9.3/go.mod h1:+IWnUfUmFO1+WVYQWQtIJHeRRdaIyyYglZN7xzUPe4Q=
+golang.org/x/exp v0.0.0-20230425010034-47ecfdc1ba53 h1:5llv2sWeaMSnA3w2kS57ouQQ4pudlXrR0dCgw51QK9o=
+golang.org/x/exp v0.0.0-20230425010034-47ecfdc1ba53/go.mod h1:V1LtkGg67GoY2N1AnLN78QLrzxkLyJw7RJb1gzOOz9w=
 golang.org/x/net v0.8.0 h1:Zrh2ngAOFYneWTAIAPethzeaQLuHwhuBkuV6ZiRnUaQ=
 golang.org/x/net v0.8.0/go.mod h1:QVkue5JL9kW//ek3r6jTKnTFis1tRmNAW2P1shuFdJc=
 golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=

specs/spec_reader.go

@@ -10,6 +10,7 @@ import (
 	"strings"
 
 	"github.com/ghodss/yaml"
+	"golang.org/x/exp/slices"
 )
 
 type SpecReader struct {
@@ -163,6 +164,17 @@ func (r *SpecReader) GetDestinationByName(name string) *Destination {
 	return r.destinationsMap[name]
 }
 
+func (r *SpecReader) GetDestinationNamesForSource(name string) []string {
+	var destinations []string
+	source := r.sourcesMap[name]
+	for _, destinationName := range source.Destinations {
+		if slices.Contains(source.Destinations, destinationName) {
+			destinations = append(destinations, r.destinationsMap[destinationName].Name)
+		}
+	}
+	return destinations
+}
+
 func NewSpecReader(paths []string) (*SpecReader, error) {
 	reader := &SpecReader{
 		sourcesMap:      make(map[string]*Source),