internal/feed: add v2impact, v3impact, and tests

1 files changed, 42 insertions, 0 deletions

diff --git a/internal/feed/v2impact.go b/internal/feed/v2impact.go
new file mode 100644
index 0000000..1585e18
--- /dev/null
+++ b/internal/feed/v2impact.go
@@ -0,0 +1,42 @@
+package feed
+
+//go:generate stringer -linecomment -type=V2Impact
+
+import (
+  "encoding/json"
+  "fmt"
+)
+
+// CVSS v2 impact level.
+type V2Impact byte
+
+const (
+  V2ImpactNone V2Impact = iota // NONE
+  V2ImpactPartial // PARTIAL
+  V2ImpactComplete // COMPLETE
+)
+
+// Unmarshal CVSS v2 impact level from JSON.
+func (me *V2Impact) 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 = V2ImpactNone
+  case "PARTIAL":
+    *me = V2ImpactPartial
+  case "COMPLETE":
+    *me = V2ImpactComplete
+  default:
+    // return error
+    return fmt.Errorf("unknown CVSS v2 impact: %s", s)
+  }
+
+  // return success
+  return nil
+}