The Google Firebase Cloud Database is used in many mobile and web applications worldwide and there are well-documented libraries for many languages and platforms. For Delphi, the cross-platform library FB4D supports the Firestore Database, the Firebase Realtime Database, the Firebase Storage (for file storage), Firebase Functions (for calling server functions), and Vision ML. For authentication, FB4D currently supports email/password authentication and anonymous login.

The library builds on the Firebase REST-API and provides all functionality with synchronous and asynchronous methods for the usage within GUI application, services and background threads. Both frameworks VCL and Firemonkey are supported. The library is a pure source code library and relies on class interfaces. For clean and short application code it supports fluent interface design.

This project offers a wiki. Seven cross platform example applications based on Firemonkey and three VCL sample applications and a Getting-Started on the wiki will help you to start working with the library. For more detailed questions, the interface reference will provide the answers you need.

You can find more learning videos on the following YouTube channel.

This log informs about interface changes and important library enhancements that need the attention of users of this library.

• October 2024: GeminiAI service added, a new tab in the DemoFB4D App demonstrates the functionality;
• August 2024: Refactoring and many improvements in DemoFB4D App;
• June 2024: Adding TOTDMapperOptions to control the behavior of the Object-To-Doc mapper. The simple FMX demo application FSObj2Doc demonstrates the Object-To-Document Mapper and has been added to the FB4D Samples project group. Add IFirestoreWriteTransaction.TransformDoc for SetServerTime, Increment, Maximum, Minimum;
• Februar 2024: Migrate to Delphi Athene;
• December 2023: The Object to Document Mapper lets you quickly sync your Pascal objects to the Firestore database by deriving your own class from TFirestoreDocument and adding member variables. All member variables are automatically written to the document and read from the document. The sample application FSObj2Doc demonstrates the functionality;
• October 2023: Firestore database write transaction supports delete document too. The Auth_SelfReg_VCL demo application explains all options of the self registration workflow;
• June 2023: Firestore database supports write transactions;
• October 2022: Interface for ML Vision service added;
• April 2021: Revised RT DB Listener;
• March 2021: New optional cache to accelerate the repeated access to storage objects. Additional IFirebaseStorage.GetAndDownload method in order to simplify the download from the storage. See more details
  New option in FB4D.SelfRegistrationFra framework to support enter display name and upload profile image when registering a new user. see more details
  Real Time Database creation has changed within the Firebase Console. The Firebase ID is no longer sufficient to access newly created RT DBs. A Firebase URL is now required, which can also include the server location. See more details.
  A new listener detects changes within the Firestore Database without pooling. See more details.

The sample projects are developed and prepared for Delphi 12.2 Athens.

🔺 This library requires at least Delphi 10.3 Rio Update 2 🔺.

Delphi is a registered trademark of Embarcadero Technologies, Inc.

FB4D is developed in pure object pascal and can be used with Firemonkey on all supported platforms. The library and its sample projects are currently tested with Win64/Win32, Mac64/32, Linux64 by using FMXLinux, iOS64 and Android. (Hint to mobile platforms: The TokenJWT to perform the token verification requires the installation of the OpenSSL libraries). For more information about using OpenSSL see the installation of OpenSSL

In the DemoFB4D app, the Edge web browser is used to display Markdown as HTML and PDF. To do this, it is necessary to install the WebView2 SDK or at least copy the WebView2Loader.dll into your executable directory. Read more about WebView2 and TWebBrowser on Embarcadero's Wiki. This upgrade is only necessary under Win32 and Win64.

AnnotateFile is limited to pdf only, as gif support does not work due RSP-17682, and the tif image format is not yet supported.

AnnotateFile is limited to pdf only, as the gif and tif image format is not yet supported by FMX.Graphics. You cannot convert an TBitmap to one of the image formats required by VisionML with the standard library.

There are no restrictions when using Delphi 11 Alexandria or higher.

For older versions up to 10.4.2, you must note the following RSP: Due to a bug in the Linux RTL, all HTTP requests that transfer data to the server by using the Patch method are not working. Put and Post methods work. This affects the Realtime DB method Patch and the Firestore method InsertOrUpdateDocument for both synchronous and asynchronous accesses. For more information see RSP-33177.

Important note about path changes: Since introduction of Gemini AI (V1.6.5.631) the folder JOSE is moved to submodules/delphi-jose-jwt because the additional submodule Delphi-Markup was added. After GIT pull please update both submodules with the Git Bash command git submodule update --remote --merge or use your favorite Git tool for this update.

For authorization token verification and token content extraction this library uses the Delphi JOSE JWT library. Thank you, Paolo Rossi for your great library!

https://github.com/paolo-rossi/delphi-jose-jwt

For converting markdown formatted text into HTML this library uses the Delphi Markdown Library. Thank you, Grahame Grieve for this great library!

https://github.com/grahamegrieve/delphi-markdown