TECH STACK

• Backend

  -Node.js - Express.js;

• CLI (COMMAND LINE INTERFACE FOR CLIENT)

     - Commander.js ( NODE MODULE FOR PROVIDING A CLI INORDRE TO TEST OUR API)

• Database

  -MongoDB;

POSTMAN TEST (API)

Bonus Features that are added along with required features

• Mutiple filter in single endpoint

• Filter based on range of dates

• Filter based on message log regex

FOLDER STRUCTURE (FOR API)

• App.js (Our main server file)

  -app.js;

• Model (Contains schema for our log ingestor)

  -Model - Log.model.js;

• Controller (Contains the handler function for our endpoints)

    - Controller
      - filters.controller.js (to provide various filters)
      - logs.controller.js (to add logs in bulk)

• Routes (Contains the endpoints through which we could test those api controllers)

  -Routes - Filter - filter.router.js - logs.router.js;

• Errors (Custom errors to handle edge cases in our api, each error is unique for the controller where it's used)

    - Error
      - Database
        - database.error.js (contains the custom database connection error)
      - Filter
        - filter.error.js (contains the custom errors based on various filters)
      - customApi.error.js (main parent custom error class that would be used by other children error class)

FOLDER STRUCTURE (FOR CLIENT CLI)

• Client Cli (contains the code for the entire clint side command line interface)

    - Client Cli (folder name)

• Service (Contains the code i.e functions for performing the api call to our endpoints)

    - Service
      - api.service.js (contains api call to filters endpoints)

• Utils (Contains our api base url)

  -Utils - apiUtils.utils.js;

• cli.js (Heart of our command line interface , contains the code for running diffrent commands to our api for testing)

  -cli.js;

Endpoints

• Logs

  LogRouter.post("/", addBulkLogToDatabase);

  This endpoint add the bulk amount of data to our log ingestor.

• Filter

  Get Single Filter

  FilterRouter.get("/getSingleFilter", getLogsUsingSingleFilter);

  This endpoint filter the log data based on the filter name and filter Value.

  URL FORMAT -: http://localhost:3000/getSingleFilter?filterName=timestamp&filterValue=2023-09-15T18:30:00.000Z
  

  Get Multiple filter

  FilterRouter.get("/getLogUsingMultipleFilters", getLogUsingMultipleFilters);

  This endpoint would retives the logs from logs data using multiple filters.

  URL FORMAT -: http://localhost:3000/getLogUsingMultipleFilters?filters=level,error,message,Network%20outage,timestamp,2023-09-15T19:45:00.000Z
  

  Get filter based on date Range

  FilterRouter.get("/getLogsUsingDateRangeFilter", getLogsUsingDateRangeFilter);

  This endpoint would filter the log data based on the date range given by user in cli.

  URL FORMAT -: http://localhost:3000/getLogsUsingDateRangeFilter?startDate=2023-09-01&endDate=2023-09-23
  

  Get message log filter based on regex

  FilterRouter.get("/getLogsUsingRegexFilter", getMeesageLogsUsingRegexFilter);

  This endpoint would filter the log data using message log based on the regex.

  URL FORMAT -: http://localhost:3000/getLogsUsingRegexFilter?regexFilter=Database corruption
  

COMMAND LINE INTERACE COMMANDS TO TEST FILTERS

1. GO TO THE CLIENT CLI DIRECTORY

   cd Client\ Cli/

2. Run the following command for making our cli.js script executable.

   chmod +x cli.js

3. Run the follwoing commands to test our api endpoinst using CLI.

   SINGLE FILTER ENDPOINT TEST

   ./cli.js getLogsUsingSingleFilter -n level -v error

   You can modify the values accordingly by changing the -n (filter type) and -v (filter value)

   MULTIPLE FILTER ENDPOINT TEST

   ./cli.js getLogsUsingMultipleFilter -f "level,error,message,Network%20outage,timestamp,2023-09-15T19:45:00.000Z"

   You can modify the values accorindingly by seeing the above command where format is "filterName,filterValue" and so on.

   DATE RANGE FILTER ENDPOINT TEST

   ./cli.js getLogsUsingDateRange -s 2023-01-01 -e 2023-12-31

   You can modify the date accordingly.

   MESSAGE LOG FILTER USING REGEX

   ./cli.js getLogsMessageUsingRegex -f "Database corruption"

   You can modify the regex value accoridingly.

STEPS TO RUN THE PROJECT (API AND CLI)

• Clone the repository on your local

• Go the cloned repository.

  mkdir repositoryName

• Run the following command to use the correct node version ( use any version above 14 )

  nvm use (version specified in the .nvmrc)

• Install the node modules on your local

  npm install

• Run the server (api) using the command

  nodemon app.js

• Test the api by using the command line interface by going to -:

  cd Client\ Cli/

• Run the command to make the cli.js script executable.

  chmod +x cli.js

• All command to test the api are specified above .