From 9c17b97cd0f83be3fff9fa4e87fd1d29052ea616 Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Fri, 4 Feb 2022 00:35:31 -0500
Subject: rename to github.com/pablotron/cvez, remove internal libs

---
 feed/nodeop.go | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 feed/nodeop.go

(limited to 'feed/nodeop.go')

diff --git a/feed/nodeop.go b/feed/nodeop.go
new file mode 100644
index 0000000..8bfa0a0
--- /dev/null
+++ b/feed/nodeop.go
@@ -0,0 +1,39 @@
+package feed
+
+//go:generate stringer -linecomment -type=NodeOp
+
+import (
+  "encoding/json"
+  "fmt"
+)
+
+// Node boolean operator.
+type NodeOp byte
+
+const (
+  OrOp NodeOp = iota  // OR
+  AndOp               // AND
+)
+
+// Unmarshal DataVersion from JSON.
+func (me *NodeOp) 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 "AND":
+    *me = AndOp
+  case "OR":
+    *me = OrOp
+  default:
+    // return error
+    return fmt.Errorf("unknown operator: %s", s)
+  }
+
+  // return success
+  return nil
+}
-- 
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