86 lines
2.8 KiB
C#
86 lines
2.8 KiB
C#
using Pilz.Data;
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using Pilz.Extensions.Reflection;
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using Pilz.Net.Extensions;
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using System.Diagnostics;
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namespace Pilz.Net.Api.Server;
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public abstract class BaseHandler<TEntity, TUpdateMsg>(IApiServer server)
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: IApiHandlerInitializer
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where TEntity : class, IDataObject
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where TUpdateMsg : ApiMessage
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{
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public class EntityUpdate(TEntity entity, TUpdateMsg message, ApiRequestInfo reqest)
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{
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public TEntity Entity { get; } = entity;
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public TUpdateMsg Message { get; } = message;
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public ApiRequestInfo Request { get; } = reqest;
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}
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/// <summary>
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/// Gets the base route (endpoint) for the most API calls.
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/// </summary>
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public abstract string Route { get; }
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protected virtual bool RegisterGet => true;
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protected virtual bool RegisterPut => true;
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protected virtual bool RegisterDelete => true;
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public virtual void Initialize(IApiServer server)
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{
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var t = GetType();
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if (RegisterGet)
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server.RegisterHandler(t.GetMethod(nameof(Get))!.CreateDelegate(this), new(Route + "/{id}", "GET"), Debugger.IsAttached);
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if (RegisterPut)
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server.RegisterHandler(t.GetMethod(nameof(Put))!.CreateDelegate(this), new(Route + "/{id}", "PUT"), Debugger.IsAttached);
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if (RegisterDelete)
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server.RegisterHandler(t.GetMethod(nameof(Delete))!.CreateDelegate(this), new(Route + "/{id}", "DELETE"), Debugger.IsAttached);
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}
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public virtual ApiResult Get(int id)
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{
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if (!server.Manager.Find(id, out TEntity? entity))
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return ApiResult.NotFound();
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return ToClient(entity).ToItemResult();
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}
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public virtual ApiResult Put(int id, TUpdateMsg msg, ApiRequestInfo req)
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{
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if (!server.Manager.Find(id, out TEntity? entity))
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return ApiResult.NotFound();
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var update = new EntityUpdate(entity, msg, req);
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if (UpdateEntity(update) is ApiResult result)
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return result;
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if (OnSave(update) is ApiResult result2)
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return result2;
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return ToClient(entity).ToItemResult();
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}
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public virtual ApiResult Delete(int id)
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{
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if (server.Manager.Find<TEntity>(id, out var entity) && OnDelete(entity) is ApiResult result)
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return result;
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return ApiResult.Ok();
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}
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protected virtual ApiResult? OnDelete(TEntity entity)
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{
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server.Manager.Delete(entity, true);
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return null;
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}
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protected virtual ApiResult? OnSave(EntityUpdate update)
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{
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server.Manager.Save(update.Entity, true);
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return null;
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}
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protected virtual TEntity CreateNewEntity(TUpdateMsg msg)
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{
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return Activator.CreateInstance<TEntity>();
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}
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protected abstract ApiResult? UpdateEntity(EntityUpdate update);
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protected abstract IDataObject ToClient(TEntity entity);
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}
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