Parse User Agent String Into Relevant Parts (Device, OS, Version)

[nelsonic]

In order to provide valuable insights, we need to split our user_agent.string
into the relevant parts so that we can determine, Operating System, Device and version.
This looks promising: https://github.com/elixir-inspector/ua_inspector
(based on https://github.com/matomo-org/device-detector ...)

iex(1)> UAInspector.parse("Mozilla/5.0 (iPad; CPU OS 7_0_4 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11B554a Safari/9537.53")
%UAInspector.Result{
  client: %UAInspector.Result.Client{
    engine: "WebKit",
    engine_version: "537.51.11",
    name: "Mobile Safari",
    type: "browser",
    version: "7.0"
  },
  device: %UAInspector.Result.Device{
    brand: "Apple",
    model: "iPad",
    type: "tablet"
  },
  os: %UAInspector.Result.OS{
    name: "iOS",
    platform: :unknown,
    version: "7.0.4"
  },
  user_agent: "Mozilla/5.0 (iPad; CPU OS 7_0_4 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11B554a Safari/9537.53"
}

iex(2)> UAInspector.parse("Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html) Safari/537.36")
%UAInspector.Result.Bot{
  category: "Search bot",
  name: "Googlebot",
  producer: %UAInspector.Result.BotProducer{
    name: "Google Inc.",
    url: "http://www.google.com"
  },
  url: "http://www.google.com/bot.html",
  user_agent: "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html) Safari/537.36"
}

Todo

• Borrow from: https://github.com/dwyl/auth/blob/83c286a24d47bd087ba41925a740d4030cf95e19/lib/auth/user_agent.ex
  and extend the user_agents schema to include all the fields extracted by UAInspector.

[nelsonic]

while reading the code: https://github.com/elixir-inspector/ua_inspector/blob/master/lib/ua_inspector.ex
and tests: https://github.com/elixir-inspector/ua_inspector/blob/master/test/ua_inspector/database/init_test.exs

I decided to create a thin wrapper that flattens the user_agent data into the format that we need: https://github.com/dwyl/user_agent

Spoiled for choice:

https://hex.pm/packages/ua

https://hex.pm/packages/user_agent

[nelsonic]

https://raw.githubusercontent.com/dwyl/auth/83c286a24d47bd087ba41925a740d4030cf95e19/lib/auth/user_agent.ex