1 files changed, 44 insertions, 0 deletions
diff --git a/configuration.go b/configuration.go
new file mode 100644
index 0000000..b00d778
--- /dev/null
+++ b/configuration.go
@@ -0,0 +1,44 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"strings"
+)
+
+type Configuration struct {
+	GroupSingleLineFunctions bool   `json:"group_single_line_functions"`
+	CommentMode             string `json:"comment_mode"`
+}
+
+func (configuration Configuration) commentMode() (CommentMode, error) {
+	switch strings.ToLower(configuration.CommentMode) {
+	case "", "follow":
+		return CommentsFollow, nil
+	case "precede":
+		return CommentsPrecede, nil
+	case "standalone":
+		return CommentsStandalone, nil
+	default:
+		return 0, fmt.Errorf("invalid comment_mode: %q (use follow, precede, or standalone)", configuration.CommentMode)
+	}
+}
+
+func loadConfiguration() Configuration {
+	var configuration Configuration
+
+	for _, fileName := range []string{".iku.json", "iku.json"} {
+		fileData, readError := os.ReadFile(fileName)
+
+		if readError != nil {
+			continue
+		}
+
+		_ = json.Unmarshal(fileData, &configuration)
+
+		break
+	}
+
+	return configuration
+}