Implement LessonSave mutation

TeacherWorkout.Api/GraphQL/Inputs/LessonSaveInput.cs

@@ -0,0 +1,13 @@
+using GraphQL.Types;
+
+namespace TeacherWorkout.Api.GraphQL.Inputs
+{
+    public class LessonSaveInput : InputObjectGraphType
+    {
+        public LessonSaveInput()
+        {
+            Name = "LessonSaveInput";
+            Field<IdGraphType>("lessonId");
+        }
+    }
+}

TeacherWorkout.Api/GraphQL/Resolvers/LessonSaveResolver.cs

@@ -0,0 +1,42 @@
+using TeacherWorkout.Api.Models;
+
+namespace TeacherWorkout.Api.GraphQL.Resolvers
+
+{
+    public static class LessonSaveResolver
+    {
+        public static LessonSavePayload Resolve(LessonSave lessonSave)
+        {
+            return new() {Lesson = MockData(lessonSave)};
+        }
+
+        private static Lesson MockData(LessonSave lessonSave)
+        {
+            return new()
+            {
+                Id = lessonSave.LessonId,
+                Title = "Lorem Ipsum",
+                Thumbnail = new Image
+                {
+                    Description = "For Challenged People",
+                    Url = "https://example.com"
+                },
+                Theme = new Theme
+                {
+                    Id = "1",
+                    Title = "Lorem Ipsum",
+                    Thumbnail = new Image
+                    {
+                        Description = "For Challenged People",
+                        Url = "https://example.com"
+                    }
+                },
+                Duration = new Duration
+                {
+                    Value = 45,
+                    Unit = DurationUnit.Minutes
+                }
+            };
+        }
+    }
+}

TeacherWorkout.Api/GraphQL/TeacherWorkoutMutation.cs

@@ -0,0 +1,28 @@
+using GraphQL;
+using GraphQL.Types;
+using TeacherWorkout.Api.GraphQL.Resolvers;
+using TeacherWorkout.Api.GraphQL.Types;
+using TeacherWorkout.Api.Models;
+using LessonSaveInput = TeacherWorkout.Api.GraphQL.Inputs.LessonSaveInput;
+
+namespace TeacherWorkout.Api.GraphQL
+{
+    public class TeacherWorkoutMutation : ObjectGraphType<object>
+    {
+        public TeacherWorkoutMutation(LessonSaveInput input)
+        {
+            Name = "Mutation";
+
+            Field<LessonSavePayloadType>(
+                "lessonSave",
+                arguments: new QueryArguments(
+                    new QueryArgument<NonNullGraphType<LessonSaveInput>> {Name = "input"}
+                ),
+                resolve: context =>
+                {
+                    var lessonSave = context.GetArgument<LessonSave>("input");
+                    return LessonSaveResolver.Resolve(lessonSave);
+                });
+        }
+    }
+}

TeacherWorkout.Api/GraphQL/TeacherWorkoutSchema.cs

@@ -13,6 +13,7 @@ public TeacherWorkoutSchema(IServiceProvider provider)
             : base(provider)
         {
             Query = provider.GetRequiredService<TeacherWorkoutQuery>();
+            Mutation = provider.GetRequiredService<TeacherWorkoutMutation>();
             AddTypeMappings();
 
             RegisterTypeMapping(typeof(ILessonStep), typeof(LessonStepInterface));

TeacherWorkout.Api/GraphQL/Types/LessonSavePayloadType.cs

@@ -0,0 +1,15 @@
+using GraphQL.Types;
+using TeacherWorkout.Api.Models;
+
+namespace TeacherWorkout.Api.GraphQL.Types
+{
+    public class LessonSavePayloadType : ObjectGraphType<LessonSavePayload>
+    {
+        public LessonSavePayloadType()
+        {
+            Name = "LessonSavePayload";
+
+            Field(x => x.Lesson).Description("The newly created lesson.");
+        }
+    }
+}

TeacherWorkout.Api/Models/LessonSave.cs

@@ -0,0 +1,14 @@
+using TeacherWorkout.Api.GraphQL.Types;
+
+namespace TeacherWorkout.Api.Models
+{
+    public class LessonSave
+    {
+        private string _lessonId;
+        public dynamic LessonId
+        {
+            get => _lessonId;
+            set => _lessonId = value.ToString();
+        }
+    }
+}

TeacherWorkout.Api/Models/LessonSavePayload.cs

@@ -0,0 +1,9 @@
+using TeacherWorkout.Api.GraphQL.Types;
+
+namespace TeacherWorkout.Api.Models
+{
+    public class LessonSavePayload
+    {
+        public Lesson Lesson { get; set; }
+    }
+}

TeacherWorkout.Api/Startup.cs

@@ -8,6 +8,7 @@
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using TeacherWorkout.Api.GraphQL;
+using TeacherWorkout.Api.GraphQL.Inputs;
 
 namespace TeacherWorkout.Api
 {
@@ -36,6 +37,8 @@ public void ConfigureServices(IServiceCollection services)
             services.AddControllers();
 
             services.AddSingleton<TeacherWorkoutQuery>();
+            services.AddSingleton<TeacherWorkoutMutation>();
+            services.AddSingleton<LessonSaveInput>();
             services.AddSingleton<ISchema, TeacherWorkoutSchema>();
             AddGraphTypes(services);
 

TeacherWorkout.Api/TeacherWorkout.Api.csproj

@@ -10,6 +10,7 @@
 
   <ItemGroup>
     <Folder Include="Controllers" />
+    <Folder Include="GraphQL\Mutations" />
   </ItemGroup>
 
 </Project>