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vehicle-challenge

Quick fun coding challenge!

Quick start

install dependencies

npm install

run API server

npm dev

run tests

npm test

make a post from the CLI

curl -X POST \
  -d '{"startDate":"2023-12-13T00:02:00Z", "endDate":"2023-12-14T17:59:51Z","vehicleId":"sprint-3"}' \
  -H "Content-Type: application/json" \
  "http://localhost:3000/search"

The Challenge

Scope

Load sample data into DB of your choice. Create an API method written in node.js that accepts interval boundaries and vehicle id as parameters and transforms sample data into a sequence of intervals in JSON format that will be later output on a timeline by frontend. Each bar on the graph represents a period of time when a vehicle was in certain status:

Input parameters

  • startDate - date&time in UTC
  • endDate - date&time in UTC
  • vehicleId - given Vehicle ID

Example Response

example response json

Requirements:

  • Response must contain at least 1 interval
  • ‘from’ key of the first interval in the resulting array must be equal to the startDate input param
  • ‘to’ key of the last interval in the resulting array must be equal to the endDate input param
  • Consecutive similar events must be combined into one interval
  • First interval in the response must contain ‘event’ value of the latest event before the startDate
  • If there’s no logged events before the startDate, first interval must contain ‘no_data’ in the ‘event’ field

Edge cases:

  • There are no events within the [startDate;endDate] interval
  • There is only one event within the [startDate;endDate] interval
  • All events within the [startDate;endDate] interval have the same type
  • There are no logged events before the startDate
  • First event’s timestamp within the [startDate;endDate] interval equals startDate
  • Last event’s timestamp within the [startDate;endDate] interval equals endDate

Error handling:

  • Suggest your own error handling
  • Cases that must me handled:
  • startDate > endDate
  • Bad format of startDate / end Date

Folder structure

challenge
+--src/                       * source for search API
+--test/                      * test files
+--CMD.md                     * sample cli command
*--README.md                  * this file
*--sample_data.csv            * the original csv file
*--vehicle_events_data.json   * the converted json used as a dummy DB