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{ ***************************************************************************
Copyright (c) 2016-2021 Kike Perez
Unit : Quick.Core.Mvc.Extensions.Entity.Rest
Description : Core MVC Extensions TaskControl
Author : Kike Perez
Version : 1.0
Created : 12/03/2020
Modified : 21/05/2021
This file is part of QuickCore: https://github.com/exilon/QuickCore
***************************************************************************
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
************************************************************ *************** }
unit Quick.Core.Mvc.Extensions.Entity.Rest;
{$i QuickCore.inc}
interface
uses
{$IFDEF DEBUG_ENTITY}
Quick.Debug.Utils,
{$ENDIF}
System.SysUtils,
System.Variants,
System.Rtti,
System.Generics.Collections,
Quick.Options,
Quick.Core.MVC,
Quick.Core.Entity,
Quick.HttpServer.Types,
Quick.Core.Mvc.Controller,
Quick.Core.Mvc.ActionResult,
Quick.Core.Entity.Request,
Quick.Core.Entity.DAO;
type
TEntityRestOptions = class(TOptions)
private
fUser : string;
fPassword : string;
fNeedCredentials : Boolean;
published
property User : string read fUser write fUser;
property Password : string read fPassword write fPassword;
property NeedCredentials : Boolean read fNeedCredentials write fNeedCredentials;
end;
TEntityRestMVCServerExtension = class(TMVCServerExtension)
class function UseRestApi(aOptionsProc : TConfigureOptionsProc = nil) : TMVCServer;
end;
[Route('api')]
//[Authorize]
TEntityRestController = class(THttpController)
private
fDBContext : TDBContext;
fOptions : TEntityRestOptions;
function GetWhereId(aModel: TEntityModel; const aId : string): string;
procedure RaiseEntityNotFound(const aMsg : string);
procedure RaiseEntityError(const aMsg : string);
public
constructor Create(aDBContext : T; aOptions : IOptions);
published
[HttpPost('connect')]
function Connect(const [FromBody]request: TEntityConnectRequest) : IActionResult;
[HttpPost('query/select')]
function SelectQuery(const [FromBody]request: TEntitySelectRequest) : IActionResult;
[HttpPost('query/update')]
function UpdateQuery(const [FromBody]request: TEntityUpdateRequest) : IActionResult;
[HttpPost('query/delete')]
function DeleteQuery(const [FromBody]request: TEntityDeleteRequest) : IActionResult;
[HttpPost('query/count')]
function CountQuery(const [FromBody]request: TEntityCountRequest) : IActionResult;
[HttpGet('{table}/{id}')]
function Get(const table : string; id : string) : IActionResult;
[HttpPost('{table}')]
function Add(const table : string; const [FromBody]value : string) : IActionResult;
[HttpPut('{table}/AOU/{id}')]
function AddOrUpdate(const table: string; const id : string; const [FromBody]value: string): IActionResult;
[HttpPut('{table}/{id}')]
function Update(const table: string; const id : string; const [FromBody]value: string): IActionResult;
[HttpDelete('{table}/{id}')]
function Delete(const table : string; id : string) : IActionResult;
end;
EEntityRestError = class(EControlledException);
implementation
{ TEntityRestMVCServerExtension }
class function TEntityRestMVCServerExtension.UseRestApi(aOptionsProc : TConfigureOptionsProc = nil) : TMVCServer;
var
restOptions : TEntityRestOptions;
begin
Result := MVCServer;
if MVCServer.Services.IsRegistered('') then
begin
// restOptions := MVCServer.Services.Resolve>.Value;
restOptions := TEntityRestOptions.Create;
if Assigned(aOptionsProc) then aOptionsProc(restOptions)
else
begin
restOptions.NeedCredentials := True;
restOptions.User := 'admin';
restOptions.Password := 'admin';
end;
MVCServer.Services.Configure(restOptions);
MVCServer.AddController(TEntityRestController);
end
else raise EEntityRestError.Create(nil,'DBContext dependency not found. Need to be added before!');
end;
{ TEntityRestController }
constructor TEntityRestController.Create(aDBContext : T; aOptions : IOptions);
begin
fDBContext := aDBContext as TDBContext;
fOptions := aOptions.Value;
end;
function TEntityRestController.GetWhereId(aModel: TEntityModel; const aId : string): string;
begin
if (aModel.PrimaryKey.DataType >= TFieldDataType.dtInteger) and
(aModel.PrimaryKey.DataType <= TFieldDataType.dtFloat) then Result := Format('%s = %s',[aModel.PrimaryKey.Name,aId])
else Result := Format('%s = "%s"',[aModel.PrimaryKey.Name,aId]);
end;
procedure TEntityRestController.RaiseEntityError(const aMsg: string);
begin
Response.StatusCode := 500;
Response.StatusText := aMsg;
raise EControlledException.Create(nil,aMsg);
end;
procedure TEntityRestController.RaiseEntityNotFound(const aMsg: string);
begin
Response.StatusCode := 404;
Response.StatusText := aMsg;
raise EControlledException.Create(nil,aMsg);
end;
function TEntityRestController.Connect(const [FromBody]request: TEntityConnectRequest) : IActionResult;
begin
//check credentials
if fOptions.NeedCredentials then
begin
if (CompareText(fOptions.User,request.User) <> 0) or (fOptions.Password <> request.Password) then RaiseEntityError('User/Pass not valid!');
end;
//if HttpContext.User.Identity.IsAuthenticated then Writeln('ok');
Result := Content(Integer(fDBContext.Connection.Provider).ToString);
end;
function TEntityRestController.SelectQuery(const request: TEntitySelectRequest): IActionResult;
var
dbset : TDBSet;
linq : IEntityLinqQuery;
reslinq : IEntityResult;
list : TObjectList;
begin
{$IFDEF DEBUG_ENTITY}
TDebugger.Enter(Self,'SelectQuery').TimeIt;
{$ENDIF}
list := nil;
try
dbset := fDBContext.GetDBSet(request.Table);
//set where clause
linq := dbset.Where(request.WhereClause);
//set order clause
if not request.Order.IsEmpty then
begin
if request.OrderAsc then linq.OrderBy(request.Order)
else linq.OrderByDescending(request.Order);
end;
//select
list := TObjectList.Create(True);
try
if request.Limit = 1 then list.Add(linq.SelectFirst)
else if request.Limit = -1 then list.Add(linq.SelectLast)
else
begin
linq.SelectTop(request.Limit).ToObjectList(list);
end;
Result := Json(list,True);
finally
list.Free;
end;
except
on E : Exception do RaiseEntityError(Format('Entity: %s',[e.Message]));
end;
end;
function TEntityRestController.UpdateQuery(const request: TEntityUpdateRequest): IActionResult;
begin
{$IFDEF DEBUG_ENTITY}
TDebugger.Enter(Self,'UpdateQuery');
{$ENDIF}
end;
function TEntityRestController.CountQuery(const request: TEntityCountRequest): IActionResult;
var
dbset : TDBSet;
begin
{$IFDEF DEBUG_ENTITY}
TDebugger.Enter(Self,'CountQuery').TimeIt;
{$ENDIF}
try
dbset := fDBContext.GetDBSet(request.Table);
Result := Content(dbset.Where(request.WhereClause).Count.ToString);
except
on E : Exception do RaiseEntityError(Format('Entity: %s',[e.Message]));
end;
end;
function TEntityRestController.DeleteQuery(const request: TEntityDeleteRequest): IActionResult;
var
dbset : TDBSet;
linq : IEntityLinqQuery;
reslinq : IEntityResult;
begin
{$IFDEF DEBUG_ENTITY}
TDebugger.Enter(Self,'DeleteQuery');
{$ENDIF}
try
dbset := fDBContext.GetDBSet(request.Table);
//set where clause
linq := dbset.Where(request.WhereClause);
//delete
linq.Delete;
Result := Ok;
except
on E : Exception do RaiseEntityError(Format('Entity: %s',[e.Message]));
end;
end;
function TEntityRestController.Get(const table: string; id: string): IActionResult;
var
dbset : TDBSet;
entity : TEntity;
begin
{$IFDEF DEBUG_ENTITY}
TDebugger.Enter(Self,'Get').TimeIt;
{$ENDIF}
dbset := fDBContext.GetDBSet(table);
entity := dbset.Where(GetWhereId(dbset.Model,id),[]).SelectFirst;
if entity = nil then RaiseEntityNotFound('register not found in database');
try
Result := Json(entity,True);
finally
entity.Free;
end;
end;
function TEntityRestController.Add(const table: string; const value: string): IActionResult;
var
dbset : TDBSet;
entity : TEntity;
begin
{$IFDEF DEBUG_ENTITY}
TDebugger.Enter(Self,'Add').TimeIt;
{$ENDIF}
dbset := fDBContext.GetDBSet(table);
entity := dbset.Model.Table.Create;
try
Self.HttpContext.RequestServices.Serializer.Json.ToObject(entity,value);
if dbset.Add(entity) then Result := Self.StatusCode(THttpStatusCode.Created,'')
else RaiseEntityNotFound('Cannot add register to database!');
finally
entity.Free;
end;
end;
function TEntityRestController.AddOrUpdate(const table: string; const id : string; const value: string): IActionResult;
var
dbset : TDBSet;
entity : TEntity;
begin
{$IFDEF DEBUG_ENTITY}
TDebugger.Enter(Self,'AddOrUpdate').TimeIt;
{$ENDIF}
dbset := fDBContext.GetDBSet(table);
entity := dbset.Model.Table.Create;
try
Self.HttpContext.RequestServices.Serializer.Json.ToObject(entity,value);
if entity.FieldValueIsEmpty(dbset.Model.PrimaryKey.Name) then HttpContext.RaiseHttpErrorBadRequest(nil,'not defined Primary Key!');
if dbset.AddOrUpdate(entity) then Result := Ok
else RaiseEntityNotFound('Cannot add or update register to database!');
finally
entity.Free;
end;
end;
function TEntityRestController.Update(const table: string; const id : string; const value: string): IActionResult;
var
dbset : TDBSet;
entity : TEntity;
begin
{$IFDEF DEBUG_ENTITY}
TDebugger.Enter(Self,'Update').TimeIt;
{$ENDIF}
dbset := fDBContext.GetDBSet(table);
entity := dbset.Model.Table.Create;
try
Self.HttpContext.RequestServices.Serializer.Json.ToObject(entity,value);
if entity.FieldValueIsEmpty(dbset.Model.PrimaryKey.Name) then HttpContext.RaiseHttpErrorBadRequest(nil,'not defined Primary Key!');
if dbset.Update(entity) then Result := Ok
else RaiseEntityNotFound('Cannot update register to database!');
finally
entity.Free;
end;
end;
function TEntityRestController.Delete(const table: string; id: string): IActionResult;
var
dbset : TDBSet;
begin
{$IFDEF DEBUG_ENTITY}
TDebugger.Enter(Self,'Delete').TimeIt;
{$ENDIF}
dbset := fDBContext.GetDBSet(table);
if dbset.Where(GetWhereId(dbset.Model,id),[]).Delete then Result := Ok
else RaiseEntityNotFound('register not found in database');
end;
end.