Setup: 
cpanm Carton
carton install

Starting the mojolicious server locally:
    - Open terminal and go to your home directory
    - cd DWS-Test\Project
    - perl CdrApp.pm

Running the test suite:
    - Open terminal and go to your home directory
    - cd DWS-Test\Project
    - carton exec -- prove -v Test\t\* > test.txt
    - Test output will be redirected into a new file test.txt located in your home directory.


Server endpoint documentation:

GET /query
    - Endpoint used to retrieve individual CDR by the CDR reference.
    - For testing purposes I implemented it in such way that it is able to take any key : value pair and query the DB for it.
    -Response: the full CDR as JSON

GET /total
    - Accepts start_date, end_date and type as params
    - Queries the DB for total duration of calls between start_date and end_date
    - Allows for additional filtering based on type param
    - Response as JSON: 
        total_call_duration is the total call duration of calls between the given perioid
        total_number_of_calls is the number of calls between the given perioid

GET /caller_id
    - Accepts caller_id, start_date, end_date and type as params
    - Queries the DB for all CDRs of caller_id param within the given time period
    - Allows for additional filtering based on type param 
    - Response contains all CDRs for the specific caller_id in the given period, as JSON.

GET /calls
    - Accepts caller_id, start_date, end_date, number_of_calls and type as params
    - number_of_calls param represents the number of most expensive calls wanted to be returned in the response
    - Allows for additional filtering based on type param 
    - Response contains the <number_of_calls> most expensive calls(CDRs) for the specific caller_id within the given time period

POST /upload
    - Accepts a file 
    - The file is downloaded into a local csv with a static name, it is read and then inserted into the local DB.
    - Response as JSON:
        OnSuccess - { "Message" : "Success" } , 200
        OnFail - server error, 400