v2 and v3 response model now in place.

Closing in around the branch soon, all the leaves and twigs are just about in place.

what-changed/model/examples.go

@@ -0,0 +1,77 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package model
+
+import (
+    "github.com/pb33f/libopenapi/datamodel/low"
+    v2 "github.com/pb33f/libopenapi/datamodel/low/v2"
+)
+
+// v2 Examples object.
+type ExamplesChanges struct {
+    PropertyChanges
+}
+
+func (a *ExamplesChanges) TotalChanges() int {
+    return a.PropertyChanges.TotalChanges()
+}
+
+func (a *ExamplesChanges) TotalBreakingChanges() int {
+    return 0 // not supported.
+}
+
+func CompareExamplesV2(l, r *v2.Examples) *ExamplesChanges {
+
+    lHashes := make(map[string]string)
+    rHashes := make(map[string]string)
+    lValues := make(map[string]low.ValueReference[any])
+    rValues := make(map[string]low.ValueReference[any])
+
+    for k := range l.Values {
+        lHashes[k.Value] = low.GenerateHashString(l.Values[k].Value)
+        lValues[k.Value] = l.Values[k]
+    }
+
+    for k := range r.Values {
+        rHashes[k.Value] = low.GenerateHashString(r.Values[k].Value)
+        rValues[k.Value] = r.Values[k]
+    }
+    var changes []*Change
+
+    // check left example hashes
+    for k := range lHashes {
+        rhash := rHashes[k]
+        if rhash == "" {
+            CreateChange(&changes, ObjectRemoved, k,
+                lValues[k].GetValueNode(), nil, false,
+                lValues[k].GetValue(), nil)
+            continue
+        }
+        if lHashes[k] == rHashes[k] {
+            continue
+        }
+        CreateChange(&changes, Modified, k,
+            lValues[k].GetValueNode(), rValues[k].GetValueNode(), false,
+            lValues[k].GetValue(), lValues[k].GetValue())
+
+    }
+
+    //check right example hashes
+    for k := range rHashes {
+        lhash := lHashes[k]
+        if lhash == "" {
+            CreateChange(&changes, ObjectAdded, k,
+                nil, lValues[k].GetValueNode(), false,
+                nil, lValues[k].GetValue())
+            continue
+        }
+    }
+
+    ex := new(ExamplesChanges)
+    ex.Changes = changes
+    if ex.TotalChanges() <= 0 {
+        return nil
+    }
+    return ex
+}