Kumjami / videogames-system-cdk-ts

Videogames System

In this project we have 3 npm workspaces to fix:

1. aws-resources It contains the AWS CDK resources: 1 dynamodb table which contains the videogames and 2 lambdas.

Problem: This workspace contains some build issues.

1. get-ps4-users-lambda It contains the source code of a lambda. This lambda has a multi-layer architecture. This lambda gets the list of users are still playing in PS4.

Problem: Implement a solution that returns an array of strings containing the names of the existing users in dynamo that have not played more than 1 ps5 videogame. Ideally this lambda runtime complexity performance needs to be linear (O(n)).

*Example*:
Given a dynamodb output:
- [
  {
    username: 'Rafe Adler',
    platform: Platform.ps5,
    videogame: 'Uncharted 3'
  },
  {
    username: 'Rafe Adler',
    platform: Platform.ps5,
    videogame: 'Uncharted 4'
  },
  {
    username: 'Elena Fisher',
    platform: Platform.ps5,
    videogame: 'Hogwarts Legacy'
  },
  {
    username: 'Chloe Frazer',
    platform: Platform.ps4,
    videogame: 'Cyberpunk 2077'
  }
]
Output:
- [ 'Elena Fisher', 'Chloe Frazer' ]

3. insert-videogame-admin-lambda It contains the source code of a lambda. This lambda has a multi-layer architecture. This lambda assignes an admin per videogame.

Problem: Implement a solution that given an array of events, it ensures the first admin event is the one assigned to the videogame

  *Example*:
  Input:
  - [
    {
      admin: 'Samuel Drake',
      platform: Platform.ps4,
      videogame: 'The last of us part II'
    },
    {
      admin: 'Elena Fisher',
      platform: Platform.ps4,
      videogame: 'The last of us part II'
    },
    {
      admin: 'Chloe Frazer',
      platform: Platform.ps4,
      videogame: 'Cyberpunk 2077'
    }
  ]
  Output:
  - [
    {
      admin: 'Samuel Drake',
      platform: Platform.ps4,
      videogame: 'The last of us part II'
    },
    {
      admin: 'Chloe Frazer',
      platform: Platform.ps4,
      videogame: 'Cyberpunk 2077'
    }
  ]

To test everything is fine, you can run this command as many times as needed npm run checkSolution.

Useful commands:

• npm run build: Builds every npm workspace
• npm run cdk: Synthesize CDK code to check if it's a valid CFN Stack
• npm run fullClean: Deletes everything (node_modules, dist, docs...) to reset from scratch the repository
• npm run clean: Deletes just dist folders
• npm run lint: Lints every npm workspace
• npm run lint:fix: Lints every npm workspace and tries to fix easy issues
• npm run test: Runs tests for every npm workspace
• npm run test:watch: Runs tests for every npm workspace on watch mode

If any of the previous commands need to be run for a specific workspace just add the flag -w: npm run test -w videogames-system/aws-resources/