Intuitive Error Handling

[pankajEndee]

Description

Status codes for errors in many apis is giving 400 (Bad Request). Here are the important ones:

• Backup Name conflict in the create backup api gives 400. (Should give 409)
• Restored index name conflict in the restore backup api gives 400. (Should give 409)
• Backup not found in the restore backup api gives 400. (Should give 404)
• Backup not found in the delete backup api gives 400. (Should give 404)
• Index not found in the vector operation (insert, get vector, update filter) api gives 400. (Should give 404)

Steps to Reproduce

1. Hit APIs with conflicted names or backups/index that does not exist.

Cause

A lot of these checks are inside main.cpp and many others in the ndd.hpp. The error which are coming from ndd.hpp do not return a code. It just returns a pair with {success: bool, message: string}. Failure on these, just sends a 400 status code

Fixes and Discussion

• Should make a common exceptions and error handling util.
• Should move all the checks/validations to either main.cpp or ndd.hpp.
• If all the validations move to ndd.hpp, they should return the status codes too.