fix: #33 don't show empty section

internal/indexer/indexer.go

@@ -56,7 +56,9 @@ func Build(metadata []config.SectionMetadata, option config.ExtractOption) ([]Se
 		}
 		slugs[slug] = true
 
-		sections = append(sections, s)
+		if len(s.ImageSets) > 0 {
+			sections = append(sections, s)
+		}
 	}
 
 	return sections, nil

internal/indexer/indexer_test.go

@@ -61,6 +61,19 @@ func TestBuildDuplicatedSlugs(t *testing.T) {
 	assert.NotNil(t, err)
 }
 
+func TestBuildEmptySection(t *testing.T) {
+	var meta config.SectionMetadata
+	var emptyMeta config.SectionMetadata
+	_ = mapstructure.Decode(testdata.Collection1, &meta)
+	_ = mapstructure.Decode(testdata.EmptyCollection, &emptyMeta)
+
+	data := []config.SectionMetadata{meta, emptyMeta}
+
+	sections, _ := Build(data, defaultOption)
+	assert.Equal(t, 1, len(sections))
+	assert.Equal(t, testdata.Collection1["title"], sections[0].Title)
+}
+
 func TestBuildImageSets(t *testing.T) {
 	expectedAscendingFileNames := []string{
 		testdata.Collection1FileName1,
@@ -89,7 +102,6 @@ func TestBuildImageSets(t *testing.T) {
 		sets[2].FileName,
 	})
 }
-
 func TestInvalidBuildImageSets(t *testing.T) {
 	tmp, _ := os.MkdirTemp("", "foto-test")
 	path := filepath.Join(tmp, "folder-not-exist")

internal/testdata/testdata.go

@@ -102,6 +102,17 @@ var (
 	Collection2FileName3 = "2023-04-29.jpg"
 )
 
+var (
+	EmptyCollection = map[string]interface{}{
+		"title":     "Empty Collection",
+		"text":      "This is an empty collection",
+		"slug":      "empty-slug-section",
+		"folder":    "../../testdata/empty-section",
+		"ascending": true,
+		"imageSets": []map[string]interface{}{},
+	}
+)
+
 var (
 	RotatedImageFile            = "../../testdata/rotated.jpg"
 	RotatedImageWidth           = 1440