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| ///////////////////////////////////////////////////////////////////////////
// //
// Copyright (c) 2015 by Charta Software B.V. //
// All rights reserved //
// //
// Version: 1.7.0.83525 //
// Web site: https://pascal.chartasoftware.com/ //
// //
// This code and information are provided "as is" without warranty of //
// any kind. Dissemination of this information or reproduction of //
// this material is strictly forbidden unless prior written permission //
// is obtained from Charta Software B.V.. //
// //
///////////////////////////////////////////////////////////////////////////
unit WebSite.Request;
interface
uses
Authorization.Authorizer,
Collection.List,
Collection.Stack.List,
ContentManagement.Article.UriProducer,
Dictionary,
Dom.Element,
Html.Element,
Http.Request,
Http.Response.Html,
Integer._32,
Language.Translator,
Localizer,
Mail,
Parser.Problem.Handler,
Resource,
Sql.Database,
Sql.Database.Connector,
Sql.Transaction,
StructuredDocument.Compiler,
StructuredDocument.Node,
StructuredDocument.Parser,
Table.Model.Factory,
Text,
Uri,
Uri.Producer,
Uuid,
WebSite.InterfaceType,
WebSite.Menu.Item,
WebSite.Module.Interaction,
WebSite.Preferences,
WebSite.Request.Handler,
WebSite.Request.Handler.Factory,
WebSite.Session,
WebSite.User.Account.Connection;
type
TWebSiteRequest = class;
TWebSiteRequestHandlerPath = class;
TWebSiteTemplate = class(TObject)
public
function Apply(Request: TWebSiteRequest; ContentStatus: THtmlContentStatus; Title: TDocumentNode; Content: THtmlElement; InterfaceType: TWebSiteInterfaceType): THtmlElement; virtual; abstract;
function GetWebSiteName(): TText; virtual; abstract;
function GetSlogan(): TText; virtual; abstract;
function GetTitle(Request: TWebSiteRequest): TText; virtual; abstract;
function GetDomain(): TText; virtual; abstract;
function GetLogo(): TResource; virtual; abstract;
function GetPasswordEmailTemplate(): TText; virtual; abstract;
function GetNewUserEmailTemplate(): TText; virtual; abstract;
end;
TStructuredDocumentToHtmlCompilerFactory = class(TObject)
public
function CreateParser(ProblemHandler: TParseProblemHandler): TStructuredDocumentParser; virtual; abstract;
function CreateHtmlCompiler(Request: TWebSiteRequest; Contents: THtmlElementList): TDocumentCompiler; virtual; abstract;
procedure CompileToHtml(Request: TWebSiteRequest; Contents: THtmlElementList; Value: TText);
end;
TAlternativeWebSiteOptionsFactory = class(TObject)
public
procedure AddOptions(Request: TWebSiteRequest; Target: TMenuItem); virtual; abstract;
function CreateConnection(Request: TWebSiteRequest): TAccountConnection; virtual; abstract;
end;
TWebSiteRequest = class(TObject)
public
HttpRequest: THttpRequest;
Session: TWebSiteSession;
Template: TWebSiteTemplate;
Path: TUriPath;
HandlerPath: TWebSiteRequestHandlerPath;
GetParameters: TDictionary;
PostParameters: TDictionary;
Preferences: TWebSitePreferences;
SqlDatabase: TSqlDatabase;
SqlDatabaseConnector: TSqlDatabaseConnector;
MaintenanceDatabaseConnector: TSqlDatabaseConnector;
Transaction: TSqlTransaction;
Translator: TTranslator;
Localizer: TLocalizer;
UriProducer: TUriProducer;
ArticleUriProducer: TAbstractArticleUriProducer;
Authorizer: TAuthorizer;
Domain: TText;
FilterValues: TList<TText>; // TODO: We really should provide a better data structure to keep track of filter values
StructuredDocument: TStructuredDocumentToHtmlCompilerFactory;
AlternativeWebSiteOptionFactory: TAlternativeWebSiteOptionsFactory;
TableModelFactory: TTableModelFactory;
HandlerFactory: TWebSiteRequestHandlerFactory;
Interaction: TWebSiteModuleInteraction;
constructor Create(); virtual;
destructor Destroy(); override;
function Resource(): TUri;
function AcquireModuleStorage(): TDomElement;
procedure ReleaseModuleStorage();
function SendMail(Mail: TMail): TUuid; // TODO: We should probably introduce something like an abstract class TMailSender instead
end;
TWebSiteRequestHandlerPath = class(TListStack<TWebSiteRequestHandler>)
protected
function GetTop(): TWebSiteRequestHandler; override;
function GetElements(Index: TInteger32): TWebSiteRequestHandler; override;
public
function Pop(): TWebSiteRequestHandler; override;
end deprecated 'An ordinary stack should be sufficient';
threadvar
ActiveWebSiteRequest: TWebSiteRequest;
implementation
uses
Configuration,
Email.Table.Set_,
Html.Document,
Internet.MediaType.Text,
Mail.Address,
Mail.Entity.Html,
Mail.Protocol.Smtp.Client,
Mail.Writer.Database,
Object_.Reference.Counter,
Sql,
Sql.Result,
StructuredDocument.Compiler.Html.Factory.Default,
Text.Document.Problem,
Text.Document.Problem.Handler,
Text.List,
WebSite.Request.Handler.Factory.Default;
{ TStructuredDocumentToHtmlCompilerFactory }
procedure TStructuredDocumentToHtmlCompilerFactory.CompileToHtml(Request: TWebSiteRequest; Contents: THtmlElementList; Value: TText);
var
Parser: TStructuredDocumentParser;
Nodes: TList<TDocumentNode>;
Compiler: TDocumentCompiler;
Problems: TSortedTextDocumentProblemList;
ProblemHandler: TTextDocumentProblemHandler;
begin
Problems := TSortedTextDocumentProblemList.Create();
ProblemHandler := TTextDocumentProblemHandler.Create(nil, Problems); // TODO: We should provide a valid document here
Parser := Request.StructuredDocument.CreateParser(ProblemHandler);
Nodes := Parser.ParseText(Value);
Compiler := Request.StructuredDocument.CreateHtmlCompiler(Request, Contents);
Compiler.CompileNodes(Nodes);
Compiler.RenderProblems(Problems);
Compiler.Free();
Nodes.Free();
Parser.Free();
ProblemHandler.Free();
Problems.Free();
end;
{ TWebSiteRequest }
constructor TWebSiteRequest.Create();
begin
inherited Create();
HandlerPath := TWebSiteRequestHandlerPath.Create();
HandlerPath.ElementManager := TReferenceCounter<TWebSiteRequestHandler>.Create();
Translator := TTranslator.Create();
Preferences := TWebSitePreferences.Create();
UriProducer := TUriProducer.Create();
FilterValues := TTextList.Create();
StructuredDocument := TDefaultStructuredDocumentToHtmlCompilerFactory.Create();
HandlerFactory := TDefaultWebSiteRequestHandlerFactory.Create(Self);
Localizer := TLocalizer.Create();
Localizer.Text := Translator;
end;
destructor TWebSiteRequest.Destroy();
begin
Preferences.Free();
Translator.Free();
Localizer.Free();
HandlerPath.Free();
UriProducer.Free();
FilterValues.Free();
StructuredDocument.Free();
GetParameters.Free();
PostParameters.Free();
AlternativeWebSiteOptionFactory.Free();
HandlerFactory.Free();
inherited Destroy();
end;
function TWebSiteRequest.AcquireModuleStorage(): TDomElement;
var
Uri: TUri;
Key: TText;
begin
// TODO: We currently lock the entire session here to prevent the module storage to become corrupt, however, we still can
// encounter "the lost update" problem because module storage is locked only briefly now. Probably we should revisit
// this approach once we persist the session and its module storage to the database.
Session.Lock.Acquire();
Uri := UriProducer.RelativeUri([], TUriResourceType.Directory);
Key := Uri.ToText();
Result := Session.ModuleStorage[Key];
if Result = nil then
begin
Result := TDomElement.Create('ModuleStorage');
Result.Attributes.Add('Uri', Key);
Session.ModuleStorage[Key] := Result;
end;
end;
procedure TWebSiteRequest.ReleaseModuleStorage();
begin
Session.Lock.Release();
end;
function TWebSiteRequest.Resource(): TUri;
begin
Result := UriProducer.RelativeUri(Path);
end;
function TWebSiteRequest.SendMail(Mail: TMail): TUuid;
var
HtmlMailEntity: THtmlMailEntity;
Document: THtmlDocument;
Style: THtmlStyle;
SmtpClient: TSmtpClient;
Configuration: TDomElement;
SmtpElement: TDomElement;
MailWriter: TMailDatabaseWriter;
SqlResult: TSqlResult;
SmtpUserId: TInteger32;
Name: TText;
EmailAddress: TText;
begin
// TODO: This is an awful function and we should provide for a much better abstraction
if Mail.Entity is THtmlMailEntity then
begin
HtmlMailEntity := Mail.Entity as THtmlMailEntity;
Document := THtmlDocument.Create();
Document.DocumentType := THtmlDocumentType.Create('', TUri.New());
Style := THtmlStyle.Create();
Style.ContentType := TMediaTypeTextCss.Create();
Style.Contents.Add('html, body {background-color: #FFFFFF;}');
Style.Contents.Add('table {text-align: left;}');
Document.Html.Head.Contents.Add(Style);
Document.Html.Body.Contents.Add(HtmlMailEntity.Element);
HtmlMailEntity.Element := Document;
end;
SqlResult :=
SqlDatabase.Query(
Select(
[
EmailTableSet.SmtpUsersTable.Name,
EmailTableSet.SmtpUsersTable.EmailAddress
],
[ EmailTableSet.SmtpUsersTable ],
[ EmailTableSet.SmtpUsersTable.ID = 1 ]
)
);
if SqlResult.FetchRow() then
begin
Name := SqlResult.ReadText();
EmailAddress := SqlResult.ReadText();
end
else
begin
Configuration := LoadDefaultConfiguration();
SmtpElement := Configuration.ElementWithName('Smtp');
Name := SmtpElement.Attributes.Get('Name').AsText();
EmailAddress := SmtpElement.Attributes.Get('Address').AsText();
Configuration.Free();
end;
Mail.From.Add(TMailAddress.Create(Name, EmailAddress));
SqlResult.Free();
// The implementation does not consider multiple users can have the same SMTP server assigned.
// Instead, an arbitrary user with server id 1 is taken.
SqlResult := SqlDatabase.Query(
Select(
[ EmailTableSet.SmtpUsersTable.Id ],
[
EmailTableSet.SmtpServersTable,
EmailTableSet.SmtpUsersTable
],
[
EmailTableSet.SmtpServersTable.ID = 1,
EmailTableSet.SmtpServersTable.ID = EmailTableSet.SmtpUsersTable.Server
]
)
);
if SqlResult.FetchRow() then
begin
SmtpUserId := SqlResult.ReadInteger();
SmtpClient := TSmtpClient.LoadFromDatabase(SqlDatabase, SmtpUserId);
end
else
SmtpClient := nil;
SqlResult.Free();
if SmtpClient = nil then
begin
Configuration := LoadDefaultConfiguration();
SmtpClient := TSmtpClient.LoadFromElement(Configuration.ElementWithName('Smtp'));
Configuration.Free();
end;
SmtpClient.Send(Mail);
SmtpClient.Quit();
SmtpClient.Free();
MailWriter := TMailDatabaseWriter.Create();
Result := MailWriter.Write(SqlDatabase, Mail);
MailWriter.Free();
end;
{ TWebSiteRequestHandlerPath }
function TWebSiteRequestHandlerPath.GetElements(Index: TInteger32): TWebSiteRequestHandler;
begin
// TODO: This inverses the implementation of the base class, however, this should not be necessary
Result := inherited GetElements(Count - 1 - Index);
end;
function TWebSiteRequestHandlerPath.GetTop(): TWebSiteRequestHandler;
begin
// TODO: This implementation circumvents exceptions caused by an empty path, this should not happen and this implementation
// should be removed
if Count > 0 then
Result := inherited GetTop()
else
Result := nil;
end;
function TWebSiteRequestHandlerPath.Pop(): TWebSiteRequestHandler;
begin
// TODO: This implementation circumvents exceptions caused by popping too many items, this should not happen and this implementation
// should be removed
if Count > 0 then
Result := inherited Pop()
else
Result := nil;
end;
end.
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