From e6c62eae0954808bdcfd418c3c2175b3eb652047 Mon Sep 17 00:00:00 2001
From: Polianin Nikita <nikitkapolyanin@yandex.ru>
Date: Fri, 26 Jan 2024 08:44:48 +0300
Subject: [PATCH] feat: add swagger configuration

---
 Endpoint/ConfigureSwaggerOptions.cs | 36 +++++++++++++++++++
 Endpoint/SwaggerDefaultValues.cs    | 55 +++++++++++++++++++++++++++++
 2 files changed, 91 insertions(+)
 create mode 100644 Endpoint/ConfigureSwaggerOptions.cs
 create mode 100644 Endpoint/SwaggerDefaultValues.cs

diff --git a/Endpoint/ConfigureSwaggerOptions.cs b/Endpoint/ConfigureSwaggerOptions.cs
new file mode 100644
index 0000000..9b53140
--- /dev/null
+++ b/Endpoint/ConfigureSwaggerOptions.cs
@@ -0,0 +1,36 @@
+using Microsoft.AspNetCore.Mvc.ApiExplorer;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Options;
+using Microsoft.OpenApi.Models;
+using Swashbuckle.AspNetCore.SwaggerGen;
+using System;
+
+namespace Mirea.Api.Endpoint;
+
+public class ConfigureSwaggerOptions(IApiVersionDescriptionProvider provider) : IConfigureOptions<SwaggerGenOptions>
+{
+    public void Configure(SwaggerGenOptions options)
+    {
+        foreach (var description in provider.ApiVersionDescriptions)
+        {
+            options.SwaggerDoc(description.GroupName, CreateInfoForApiVersion(description));
+        }
+    }
+
+    private static OpenApiInfo CreateInfoForApiVersion(ApiVersionDescription description)
+    {
+        var info = new OpenApiInfo()
+        {
+            Title = "MIREA Schedule Web API",
+            Version = description.ApiVersion.ToString(),
+            Description = "This API provides a convenient interface for retrieving data stored in the database. Special attention was paid to the lightweight and easy transfer of all necessary data. Made by the Winsomnia team.",
+            Contact = new OpenApiContact { Name = "Author name", Email = "support@winsomnia.net" },
+            License = new OpenApiLicense { Name = "MIT", Url = new Uri("https://opensource.org/licenses/MIT") }
+        };
+
+        if (description.IsDeprecated)
+            info.Description += " This API version has been deprecated.";
+
+        return info;
+    }
+}
\ No newline at end of file
diff --git a/Endpoint/SwaggerDefaultValues.cs b/Endpoint/SwaggerDefaultValues.cs
new file mode 100644
index 0000000..d47c591
--- /dev/null
+++ b/Endpoint/SwaggerDefaultValues.cs
@@ -0,0 +1,55 @@
+using Microsoft.AspNetCore.Mvc.ApiExplorer;
+using Microsoft.AspNetCore.Mvc.ModelBinding;
+using Microsoft.OpenApi.Models;
+using Swashbuckle.AspNetCore.SwaggerGen;
+using System;
+using System.Linq;
+using System.Text.Json;
+
+namespace Mirea.Api.Endpoint;
+
+public class SwaggerDefaultValues : IOperationFilter
+{
+    public void Apply(OpenApiOperation operation, OperationFilterContext context)
+    {
+        var apiDescription = context.ApiDescription;
+        operation.Deprecated |= apiDescription.IsDeprecated();
+
+        foreach (var responseType in context.ApiDescription.SupportedResponseTypes)
+        {
+            var responseKey = responseType.IsDefaultResponse ? "default" : responseType.StatusCode.ToString();
+            var response = operation.Responses[responseKey];
+
+            foreach (var contentType in response.Content.Keys)
+            {
+                if (responseType.ApiResponseFormats.All(x => x.MediaType != contentType))
+                {
+                    response.Content.Remove(contentType);
+                }
+            }
+        }
+
+        if (operation.Parameters == null)
+        {
+            return;
+        }
+
+        foreach (var parameter in operation.Parameters)
+        {
+            var description = apiDescription.ParameterDescriptions.First(p => p.Name == parameter.Name);
+
+            parameter.Description ??= description.ModelMetadata?.Description;
+
+            if (parameter.Schema.Default == null &&
+                description.DefaultValue != null &&
+                description.DefaultValue is not DBNull &&
+                description.ModelMetadata is ModelMetadata modelMetadata)
+            {
+                var json = JsonSerializer.Serialize(description.DefaultValue, modelMetadata.ModelType);
+                parameter.Schema.Default = OpenApiAnyFactory.CreateFromJson(json);
+            }
+
+            parameter.Required |= description.IsRequired;
+        }
+    }
+}
\ No newline at end of file