add JSON API

Gemfile

@@ -1,6 +1,7 @@
 source "https://rubygems.org"
 
 gem "sinatra", "~> 1.4"
+gem "sinatra-contrib", "~> 1.4"
 
 group :test do
   gem "rspec", "~> 3.0"

Gemfile.lock

@@ -2,10 +2,12 @@ GEM
   remote: https://rubygems.org/
   specs:
     addressable (2.4.0)
+    backports (3.6.8)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     diff-lcs (1.2.5)
     hashdiff (0.3.0)
+    multi_json (1.11.2)
     rack (1.6.4)
     rack-protection (1.5.3)
       rack
@@ -29,6 +31,13 @@ GEM
       rack (~> 1.5)
       rack-protection (~> 1.4)
       tilt (>= 1.3, < 3)
+    sinatra-contrib (1.4.6)
+      backports (>= 2.0)
+      multi_json
+      rack-protection
+      rack-test
+      sinatra (~> 1.4.0)
+      tilt (>= 1.3, < 3)
     tilt (2.0.2)
     webmock (1.24.0)
       addressable (>= 2.3.6)
@@ -42,6 +51,7 @@ DEPENDENCIES
   rack-test (~> 0.6)
   rspec (~> 3.0)
   sinatra (~> 1.4)
+  sinatra-contrib (~> 1.4)
   webmock (~> 1.24)
 
 BUNDLED WITH

lib/app.rb

@@ -1,4 +1,5 @@
-require 'sinatra/base'
+require "sinatra/base"
+require "sinatra/json"
 
 require_relative "radar"
 
@@ -16,4 +17,16 @@ class FlightSchool < Sinatra::Base
       erb :no_airport
     end
   end
+
+  get "/api/airports/:code" do
+    begin
+      airport_status = Radar.status_for(params[:code])
+      json code: airport_status.code,
+        name: airport_status.name,
+        city: airport_status.city,
+        weather: airport_status.weather
+    rescue Radar::NoSuchAirport
+      status 404
+    end
+  end
 end

spec/integration_spec.rb

@@ -1,3 +1,4 @@
+require "json"
 require "rack/test"
 
 ENV['RACK_ENV'] = 'test'
@@ -36,4 +37,13 @@ def app
     expect(last_response).to be_not_found
     expect(last_response.body).to include("Couldn't find that airport!")
   end
+
+  it "has a JSON API" do
+    get "/api/airports/SFO"
+    expect(last_response).to be_ok
+
+    parsed_body = JSON.parse(last_response.body)
+
+    expect(parsed_body["city"]).to eq("San Francisco")
+  end
 end