app.rb

require 'sinatra'
require 'open-uri'
require 'ctags_reader'
require 'json'
require_relative 'ctagger'

configure do
  set :server, :puma
end

CTagger.create_directories

get '/' do
  headers( "Access-Control-Allow-Origin" => "*" )
  "Hello!"
end

get '/definition' do
  headers( "Access-Control-Allow-Origin" => "*" )

  repo_slug = parse_param(params[:repo_slug])
  commit_hash = parse_param(params[:commit])
  tag = parse_param(params[:tag])

  return 400 if repo_slug.nil? || commit_hash.nil? || tag.nil?

  ctagger = CTagger.new(repo_slug, commit_hash)
  ctagger.generate_tags if !ctagger.tags_exist?
  results = ctagger.lookup_tag(tag)

  ctagger.cleanup

  response = {
    :found => results.size > 0,
    :results => results
  }

  response.to_json
end

def parse_param(string)
  return nil if string == 'null'
  string
end