Get the latest releae

github_releases.rb

require 'net/https'
require 'json'
require 'uri'

module MightyOctocat
  class Releases
    attr_reader :owner, :repo

    # ==== Arguments
    #
    #   * owner - String: the repo owner name
    #   * repo  - String: the name of the repo
    #
    # ==== Returns
    #
    #   * Hash - contains all the information for the latest release
    #
    def self.latest_for(owner, repo)
      new(owner, repo).get_latest_release
    end


    # ==== Arguments
    #
    #   * owner - String: the repo owner name
    #   * repo  - String: the name of the repo
    #
    # ==== Returns
    #
    #   * String - URL of the latest tarball
    #
    def self.latest_tarball(owner, repo)
      new(owner, repo).get_latest_tarball
    end


    #
    # ==== Arguments
    #
    #   * owner - String: the repo owner name
    #   * repo  - String: the name of the repo
    #
    def initialize(owner, repo)
      @owner, @repo = owner, repo
    end


    # Gets the latest tarball
    #
    # ==== Returns
    #
    #   * String that represents the URL of the tarball
    #
    def get_latest_tarball
      get_releases.first["tarball_url"]
    end


    # Gets the latest release
    #
    # ==== Returns
    #
    #   * Hash - contains all the information for the latest release
    #
    def get_latest_release
      get_releases.first
    end


    # Gets the all the releases
    #
    # ==== Returns
    #
    #   * Array of Hashes containing all the releases for a given repo
    #
    def get_all_releases
      get_releases
    end

    private

    def get_releases
      parse(send_request.body)
    end

    def uri
      @uri ||= URI.parse("https://api.github.com/repos/#{owner}/#{repo}/releases")
    end

    def parse(body)
      ::JSON.parse(body)
    end

    def send_request
      @send_request ||= http.request(request)
    end

    def http
      @http ||= begin
        http              = ::Net::HTTP.new(uri.host, uri.port)
        http.use_ssl      = true
        http.verify_mode  = ::OpenSSL::SSL::VERIFY_PEER
        http
      end
    end

    def request
      @request ||= begin
        request               = ::Net::HTTP::Get.new(uri.path)
        request["User-Agent"] = "The Mighty Octocat"
        request["Accept"]     = "application/vnd.github.manifold-preview"
        request
      end
    end

  end
end

## Usage
#
# Using class methods:
#
# latest_release = MightyOctocat::Releases.latest_for('twbs', 'bootstrap')
# puts latest_release.inspect
#
# latest_tarball = MightyOctocat::Releases.latest_tarball('twbs', 'bootstrap')
# puts latest_tarball
#
# Using instance methods
#
# releases = MightyOctocat::Releases.new('twbs', 'bootstrap')
# releases.get_all_releases
# releases.get_latest_release
# releases.get_latest_tarball