First release of open core

pkg/report/parser.go

@@ -0,0 +1,57 @@
+package report
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// ExtractJSONField traverses an unmarshaled JSON object using dot notation.
+func ExtractJSONField(data any, path string) string {
+	if path == "" || data == nil {
+		return ""
+	}
+
+	parts := strings.Split(path, ".")
+	current := data
+
+	for _, part := range parts {
+		if current == nil {
+			return ""
+		}
+
+		switch v := current.(type) {
+		case map[string]any:
+			val, ok := v[part]
+			if !ok {
+				return ""
+			}
+			current = val
+
+		case []any:
+			idx, err := strconv.Atoi(part)
+			if err != nil || idx < 0 || idx >= len(v) {
+				return ""
+			}
+			current = v[idx]
+
+		default:
+			return ""
+		}
+	}
+
+	if current == nil {
+		return ""
+	}
+
+	switch v := current.(type) {
+	case string:
+		return v
+	case float64:
+		return strconv.FormatFloat(v, 'f', -1, 64)
+	case bool:
+		return strconv.FormatBool(v)
+	default:
+		return fmt.Sprintf("%v", v)
+	}
+}