Additional properties now supported.

datamodel/low/3.0/schema.go

@@ -5,11 +5,13 @@ import (
 	"github.com/pb33f/libopenapi/index"
 	"github.com/pb33f/libopenapi/utils"
 	"gopkg.in/yaml.v3"
+	"strconv"
 	"sync"
 )
 
 const (
 	PropertiesLabel           = "properties"
+	AdditionalPropertiesLabel = "additionalProperties"
 	ExampleLabel              = "example"
 	ItemsLabel                = "items"
 	AllOfLabel                = "allOf"
@@ -84,6 +86,20 @@ func (s *Schema) Build(root *yaml.Node, idx *index.SpecIndex, level int) error {
 		s.Example = low.NodeReference[any]{Value: expNode.Value, KeyNode: expLabel, ValueNode: expNode}
 	}
 
+	_, addPLabel, addPNode := utils.FindKeyNodeFull(AdditionalPropertiesLabel, root.Content)
+	if addPNode != nil {
+		if utils.IsNodeMap(addPNode) {
+			var props map[string]interface{}
+			addPNode.Decode(&props)
+			s.AdditionalProperties = low.NodeReference[any]{Value: props, KeyNode: addPLabel, ValueNode: addPNode}
+		}
+
+		if utils.IsNodeBoolValue(addPNode) {
+			b, _ := strconv.ParseBool(addPNode.Value)
+			s.AdditionalProperties = low.NodeReference[any]{Value: b, KeyNode: addPLabel, ValueNode: addPNode}
+		}
+	}
+
 	// handle discriminator if set.
 	_, discLabel, discNode := utils.FindKeyNodeFull(DiscriminatorLabel, root.Content)
 	if discNode != nil {

datamodel/low/3.0/schema_test.go

@@ -87,7 +87,11 @@ properties:
       somethingBProp:
         type: string
         description: something b subprop
-        example: picnics are nice.`
+        example: picnics are nice.
+    additionalProperties: 
+        why: yes
+        thatIs: true    
+additionalProperties: true`
 
 	var rootNode yaml.Node
 	mErr := yaml.Unmarshal([]byte(testSpec), &rootNode)
@@ -100,12 +104,22 @@ properties:
 	schErr := sch.Build(rootNode.Content[0], nil, 0)
 	assert.NoError(t, schErr)
 	assert.Equal(t, "something object", sch.Description.Value)
+	assert.True(t, sch.AdditionalProperties.Value.(bool))
+
+	assert.Len(t, sch.Properties, 2)
+	v := sch.FindProperty("somethingB")
+	assert.NotNil(t, v.Value.AdditionalProperties.Value)
+
+	var addProps map[string]interface{}
+	v.Value.AdditionalProperties.ValueNode.Decode(&addProps)
+	assert.Equal(t, "yes", addProps["why"])
+	assert.Equal(t, true, addProps["thatIs"])
 
 	// check polymorphic values allOf
 	assert.Equal(t, "an allof thing", sch.AllOf[0].Value.Description.Value)
 	assert.Len(t, sch.AllOf[0].Value.Properties, 2)
 
-	v := sch.AllOf[0].Value.FindProperty("allOfA")
+	v = sch.AllOf[0].Value.FindProperty("allOfA")
 	assert.NotNil(t, v)
 	assert.Equal(t, "allOfA description", v.Value.Description.Value)
 	assert.Equal(t, "allOfAExp", v.Value.Example.Value)

utils/utils.go

@@ -244,6 +244,8 @@ func FindKeyNodeFull(key string, nodes []*yaml.Node) (keyNode *yaml.Node, labelN
 		if i%2 == 0 && key == v.Value {
 			return v, nodes[i], nodes[i+1] // next node is what we need.
 		}
+	}
+	for _, v := range nodes {
 		for x, j := range v.Content {
 			if key == j.Value {
 				if IsNodeMap(v) {