SNCF CADViewer Architecture

SNCF has the following infrastructure:

• Library of drawings over all stations and railroads in France
• Online search system PAAS which allow users to select drawings from an internal database

SNCF has the following requirement:

• Users will select two drawings in PAAS.
• A button in PAAS will contains a link to CADViewer, with the two drawings as parameters (drawingname1 and drawingname2).
• PAAS (or a script) will create a temp folder with the drawings, and pass this information over to CADViewer
• CADViewer will directly execute the Compare method of the two drawings - alternatively, this can be controlled from the compare button inside CADViewer

Suggested SNCF Overview Architecture

graph TD;
   A[CADViewer Front-End  
 SNCF Compare Extensions 
 1: JavaScript library/npm Script library 
 2:JavaScript API / Callback methods API ] -->|post/get| C[CADViewer RestFUL API
Implements structured request-responses for:
 CAD conversion, Data Extraction and File manipulation  ] 
   C --> |post/get| A

   A--> D[PAAS System
 Calls CADViewer Front-End
Interacts with SNCF Back-end]
   D --> |Trigger call to CADViewer with  
location of compare drawings 
 in folder structure| A


   E[CAD Converter Packages 
Tailor Made c++ native-code core CAD software:
 AutoXchange 2024 - data conversion, data compare] --> C
   C --> E

   
   
   I[PAAS Database
Database containing all information in respect to: 
 SNCF Drawings and content] --> |SNCF internal process| D
   D -->|SNCF internal process| I


   J[Folder structure with DWG drawings for Compare 
 Subfolders /temp names/ for each compare DWG pair ] -->  D
   D -->|move DWG compare files 
 into random named folder| J

   J -->|Load compare drawings|E
   E -->|Directory query|J