1 files changed, 40 insertions, 0 deletions
diff --git a/internal/feed/v3userinteraction.go b/internal/feed/v3userinteraction.go
new file mode 100644
index 0000000..a6a53ca
--- /dev/null
+++ b/internal/feed/v3userinteraction.go
@@ -0,0 +1,40 @@
+package feed
+
+//go:generate stringer -linecomment -type=V3UserInteraction
+
+import (
+  "encoding/json"
+  "fmt"
+)
+
+// CVSS v3 user interaction
+type V3UserInteraction byte
+
+const (
+  V3UINone V3UserInteraction = iota // NONE
+  V3UIRequired // REQUIRED
+)
+
+// Unmarshal CVSS user interaction from JSON.
+func (me *V3UserInteraction) UnmarshalJSON(b []byte) error {
+  // decode string, check for error
+  var s string
+  if err := json.Unmarshal(b, &s); err != nil {
+    return err
+  }
+
+  // check value
+  switch s {
+  case "NONE":
+    *me = V3UINone
+  case "REQUIRED":
+    *me = V3UIRequired
+  default:
+    // return error
+    return fmt.Errorf("unknown CVSS v3 user interaction: %s", s)
+  }
+
+  // return success
+  return nil
+}
+