minor fixes
Backend refactor
api.GraphExport rename
Backend cleanup and refactor
Update and refactor models for DB access.
Removed TABLE 'log' from database
Rename subedgeInfo.originalId to id
Removed vertex originalId
changed group verticesId from vertex.id to vertex.originalId
Removed positions array and added vertex.position and group.positioin item
Removed archetypeIcons array and added icon to vertexArchetypes
Changed vertex.title to vertex.name and removed archetype.name from title
Fix LoadGraphData response codes
SaveDiagram and RemoveDiagram servlets validate diagram_id parameter for both null and empty string
Login and Register servlets return details on why the request failed
fixed isLoggedIn method to be null-proof
minor servlet improvements
modified servlet to use helper methods from BaseServlet
fixed LoadGraphData servlet not to delete JSON from session which caused failure on page reload
backend cleanup
fixed redirect from upload to graph screen to use base app URL
modified RemoveDiagram servlet to use HTTP method DELETE instead of POST
reworked upload screen
moved API servlets to a separate package, made all servlets extend BaseServlet
reworked Register, Login and Logout servlets to work as API
dropped unused servlets
Added remove diagram servlet + minor fixes
LoadGraphData reformat
LoadGraphData user permission check
Added save button
loading of saved diagrams
Created save diagram servlet
Changed diagram table and Diagram class
joined load graph and start visualization steps on uploadFiles page. Removed saving uploaded file to file system.
Vertex/Edge attribute rendering
dropped some unused functionality, merged DefaultPage with UploadFiles servlet
Removed EFP from backend
Removed unnecessarily conversion to string
fixed servlet output encoding
moved backend code to directories following Maven convention