feat: support convert uniqueItems, minItems and maxItems keywords in …

…json schema

pkg/tools/gen/genkcl_jsonschema.go

@@ -233,6 +233,20 @@ func convertSchemaFromJsonSchema(ctx convertContext, s *jsonschema.Schema, name
 			result.Validations = append(result.Validations, validation{
 				MultiplyOf: &vInt,
 			})
+		case *jsonschema.UniqueItems:
+			if *v {
+				result.Validations = append(result.Validations, validation{
+					Unique: true,
+				})
+			}
+		case *jsonschema.MinItems:
+			result.Validations = append(result.Validations, validation{
+				MinLength: (*int)(v),
+			})
+		case *jsonschema.MaxItems:
+			result.Validations = append(result.Validations, validation{
+				MaxLength: (*int)(v),
+			})
 		default:
 			logger.GetLogger().Warningf("unknown Keyword: %s", k)
 		}

pkg/tools/gen/templates/validator.gotmpl

@@ -17,4 +17,7 @@
     {{- if .MultiplyOf }}
         multiplyof({{ formatName .Name }}, {{ .MultiplyOf }})
     {{- end }}
+    {{- if .Unique }}
+        isunique({{ formatName .Name }})
+    {{- end }}
 {{- end -}}

pkg/tools/gen/testdata/jsonschema/items/expect.k

@@ -0,0 +1,22 @@
+"""
+This file was generated by the KCL auto-gen tool. DO NOT EDIT.
+Editing this file might prove futile when you re-run the KCL auto-gen generate command.
+"""
+
+schema Book:
+    """
+    Book
+
+    Attributes
+    ----------
+    title : str, optional
+    authors : [str], optional
+    """
+
+    title?: str
+    authors?: [str]
+
+    check:
+        len(authors) <= 5
+        len(authors) >= 1
+        isunique(authors)

pkg/tools/gen/testdata/jsonschema/items/input.json

@@ -0,0 +1,19 @@
+{
+	"$schema": "http://json-schema.org/draft-07/schema#",
+	"$id": "https://example.com/schemas/book.json",
+	"type": "object",
+	"properties": {
+		"title": {
+			"type": "string"
+		},
+		"authors": {
+			"type": "array",
+			"items": {
+				"type": "string"
+			},
+			"minItems": 1,
+			"maxItems": 5,
+			"uniqueItems": true
+		}
+	}
+}

pkg/tools/gen/types.go

@@ -157,6 +157,7 @@ type validation struct {
 	MaxLength        *int
 	Regex            *regexp.Regexp
 	MultiplyOf       *int
+	Unique           bool
 }
 
 // indexSignature is a kcl schema index signature definition.