can i solve https://github.com/TandaHQ/work-samples/tree/master/pings%20(backend) in less than an hour

server.rb

# i wish i did this in JS

require 'sinatra'
require 'fileutils'
require 'json'
require 'date'
require 'time'
require 'byebug'

get "/devices" do
  content_type :json
  Dir.glob("files/*").to_json
end

get "/:device_id/:date" do
  content_type :json
  
  files = if params[:device_id] == 'all'
    Dir.glob("files/*").map {|f|
      data = File.read(f).each_line.to_a.map(&:strip).find_all {|t|
    start = Date.parse(params[:date]).to_time
    finish = start + 86400
    t = Time.at(t.to_i)
    t >= start && t <= finish
  }
    [f, data]
    }.to_h
  else
    File.read("files/#{params[:device_id]}").each_line.to_a.map(&:strip).find_all {|t|
    start = Date.parse(params[:date]).to_time
    finish = start + 86400
    t = Time.at(t.to_i)
    t >= start && t <= finish
  }
  end.to_json
  
end

get "/:device_id/:from/:to" do
  content_type :json

  files = if params[:device_id] == 'all'
    Dir.glob("files/*").map {|f|
      data = File.read(f).each_line.to_a.map.find_all {|t|
    start = Date.parse(params[:from]).to_time rescue Time.at(params[:from].to_i)
    finish = Date.parse(params[:to]).to_time rescue Time.at(params[:to].to_i)
    t = Time.at(t.to_i)
    t >= start && t < finish
  }
    [f, data]
    }.to_h
  elsif File.exist?(File.read("files/#{params[:device_id]}"))
    File.read("files/#{params[:device_id]}").each_line.to_a.map(&:strip).find_all {|t|
    start = Date.parse(params[:from]).to_time rescue Time.at(params[:from].to_i)
    finish = Date.parse(params[:to]).to_time rescue Time.at(params[:to].to_i)
    t = Time.at(t.to_i)
    t >= start && t < finish
  }
else
  []
  end.to_json
  
  

end

post "/:device_id/:timestamp" do
  FileUtils.mkdir_p("files")
  File.open("files/#{params[:device_id]}", 'a') { |f| f.puts params[:timestamp]}
  status 200
end

post "/clear_data" do
  FileUtils.rm_rf("files")
  status 200
end

Wow. So much better than JavaScript!

That was fun! We should do live code challenges more often.