Add baseline validator

Signed-off-by: Adolfo García Veytia (Puerco) <adolfo.garcia@uservers.net>

Author: puerco

cmd/pkg/baseline/validator.go

@@ -0,0 +1,51 @@
+// SPDX-FileCopyrightText: Copyright 2025 The OSPS Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package baseline
+
+import (
+	"fmt"
+	"log"
+	"slices"
+
+	"github.com/ossf/security-baseline/pkg/types"
+)
+
+type Validator struct {
+}
+
+// Check verifies the data parsed for consistency and completeness
+func Check(b *types.Baseline) error {
+	var entryIDs []string
+	var failed bool
+	for _, category := range b.Categories {
+		for _, entry := range category.Criteria {
+			if slices.Contains(entryIDs, entry.ID) {
+				failed = true
+				log.Printf("duplicate ID for 'criterion' for %s", entry.ID)
+			}
+			if entry.ID == "" {
+				failed = true
+				log.Printf("missing ID for 'criterion' %s", entry.ID)
+			}
+			if entry.CriterionText == "" {
+				failed = true
+				log.Printf("missing 'criterion' text for %s", entry.ID)
+			}
+			// For after all fields are populated:
+			// if entry.Rationale == "" {
+			// 	failed = true
+			// 	log.Printf("missing 'rationale' for %s", entry.ID)
+			// }
+			// if entry.Details == "" {
+			// 	failed = true
+			// 	log.Printf("missing 'details' for %s", entry.ID)
+			// }
+			entryIDs = append(entryIDs, entry.ID)
+		}
+	}
+	if failed {
+		return fmt.Errorf("error validating baseline")
+	}
+	return nil
+}