media: merge tvdb and trakt languages

util/slice.go

@@ -10,3 +10,34 @@ func StringSliceContains(slice []string, val string) bool {
 	}
 	return false
 }
+
+func StringSliceMergeUnique(existingSlice []string, mergeSlice []string) []string {
+	// add existing
+	data := make([]string, 0)
+	for _, es := range existingSlice {
+		if es == "" {
+			continue
+		}
+		data = append(data, es)
+	}
+
+	// add merge items (unique)
+	for _, ms := range mergeSlice {
+		if ms == "" {
+			continue
+		}
+
+		merge := true
+		for _, es := range data {
+			if strings.EqualFold(es, ms) {
+				merge = false
+				break
+			}
+		}
+
+		if merge {
+			data = append(data, ms)
+		}
+	}
+	return data
+}

util/slice_test.go

@@ -1,6 +1,9 @@
 package util
 
-import "testing"
+import (
+	"reflect"
+	"testing"
+)
 
 func TestStringSliceContains(t *testing.T) {
 	type args struct {
@@ -37,3 +40,55 @@ func TestStringSliceContains(t *testing.T) {
 		})
 	}
 }
+
+func TestStringSliceMergeUnique(t *testing.T) {
+	type args struct {
+		existingSlice []string
+		mergeSlice    []string
+	}
+	tests := []struct {
+		name string
+		args args
+		want []string
+	}{
+		{
+			name: "no change",
+			args: args{
+				existingSlice: []string{"test", "test2"},
+				mergeSlice:    []string{"test", "Test2"},
+			},
+			want: []string{"test", "test2"},
+		},
+		{
+			name: "no change empty",
+			args: args{
+				existingSlice: []string{},
+				mergeSlice:    []string{},
+			},
+			want: []string{},
+		},
+		{
+			name: "with change",
+			args: args{
+				existingSlice: []string{"test", "test2"},
+				mergeSlice:    []string{"test", "Test2", "test3"},
+			},
+			want: []string{"test", "test2", "test3"},
+		},
+		{
+			name: "with change no empty",
+			args: args{
+				existingSlice: []string{"", "en"},
+				mergeSlice:    []string{"fr", "", "en"},
+			},
+			want: []string{"en", "fr"},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := StringSliceMergeUnique(tt.args.existingSlice, tt.args.mergeSlice); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("StringSliceMergeUnique() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}