Merge extension (#10)

* Generate JSON schema from type and merge in extension schema * Rename Extension class
vudodov · Jul 17, 2019 · 56ecf8e · 56ecf8e
1 parent 80cdb4f
commit 56ecf8e
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diff --git a/V.Udodov.Json.Tests/JsonSchemaTests.cs b/V.Udodov.Json.Tests/JsonSchemaTests.cs
@@ -0,0 +1,71 @@
+using Xunit;
+
+namespace V.Udodov.Json.Tests
+{
+    public class JsonSchemaTests
+    {
+        private class TheMock
+        {
+            public string MockProp { get; set; }
+        }
+
+        [Fact]
+        public void WhenGeneratingJsonSchemaFromTypeAndStringItShouldGenerate()
+        {
+            const string schema = @"{
+              'type': 'object',
+              'properties': {
+                'shoe_size': { 'type': 'number', 'minimum': 5, 'maximum': 12, 'multipleOf': 1.0 }
+              }
+            }";
+
+            var result = typeof(TheMock).Merge(schema);
+
+            result.JsonEquals(@"{
+                ""$id"": ""V.Udodov.Json.Tests.JsonSchemaTests+TheMock"",
+                ""type"": ""object"",
+                ""properties"": {
+                    ""mockProp"": {
+                        ""type"": [
+                            ""string"",
+                            ""null""
+                                ]
+                    },
+                    ""shoe_size"": { 
+                        ""type"": ""number"", 
+                        ""minimum"": 5.0, 
+                        ""maximum"": 12.0, 
+                        ""multipleOf"": 1.0 
+                    }
+                },
+                ""required"": [
+                    ""mockProp""
+                    ]
+                }");
+        }
+
+        [Fact]
+        public void WhenGeneratingJsonSchemaFromTypeItShouldGenerate()
+        {
+            const string schema = null;
+
+            var result = typeof(TheMock).Merge(schema);
+
+            result.JsonEquals(@"{
+                ""$id"": ""V.Udodov.Json.Tests.JsonSchemaTests+TheMock"",
+                ""type"": ""object"",
+                ""properties"": {
+                    ""mockProp"": {
+                        ""type"": [
+                            ""string"",
+                            ""null""
+                                ]
+                    }
+                },
+                ""required"": [
+                    ""mockProp""
+                    ]
+                }");
+        }
+    }
+}
diff --git a/V.Udodov.Json/TypeExtensions.cs b/V.Udodov.Json/TypeExtensions.cs
@@ -0,0 +1,30 @@
+using System;
+using System.Linq;
+using Newtonsoft.Json.Schema;
+using Newtonsoft.Json.Schema.Generation;
+using Newtonsoft.Json.Serialization;
+
+namespace V.Udodov.Json
+{
+    public static class TypeExtensions
+    {
+        /// <summary>
+        /// Generates JSON Schema from the type and merges it with JSON Schema provided in <paramref name="jsonSchema"/>.
+        /// Optionally resulting JSON Schema Id might be defined. If not Id will be generated based from the <paramref name="mergeIn"/> full name.  
+        /// </summary>
+        public static string Merge(this Type mergeIn, string jsonSchema, Uri id = null)
+        {
+            var schema = new JSchemaGenerator
+            {
+                SchemaIdGenerationHandling =
+                    id == null ? SchemaIdGenerationHandling.FullTypeName : SchemaIdGenerationHandling.None,
+                ContractResolver = new CamelCasePropertyNamesContractResolver()
+            }.Generate(mergeIn);
+
+            if(!string.IsNullOrWhiteSpace(jsonSchema))
+                JSchema.Parse(jsonSchema).Properties.ToList().ForEach(schema.Properties.Add);
+
+            return schema.ToString();
+        }
+    }
+}