initial commit

.gitignore

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+*.gem
+*.rbc
+.bundle
+.config
+.yardoc
+Gemfile.lock
+InstalledFiles
+_yardoc
+coverage
+doc/
+lib/bundler/man
+pkg
+rdoc
+spec/reports
+test/tmp
+test/version_tmp
+tmp

.rspec

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+--color

.travis.yml

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+language: ruby
+rvm:
+  - jruby-19mode
+  - rbx-19mode
+  - 1.9.3
+  - 2.0.0
+  - ruby-head
+  - jruby-head
+jdk:
+  - openjdk6
+  - openjdk7
+  - oraclejdk7
+matrix:
+  allow_failures:
+    - rvm: ruby-head
+    - rvm: jruby-head
+  exclude:
+    - rvm: 1.9.3
+      jdk: openjdk7
+    - rvm: 1.9.3
+      jdk: oraclejdk7
+    - rvm: 2.0.0
+      jdk: openjdk7
+    - rvm: 2.0.0
+      jdk: oraclejdk7
+    - rvm: ruby-head
+      jdk: openjdk7
+    - rvm: ruby-head
+      jdk: oraclejdk7
+    - rvm: rbx-19mode
+      jdk: openjdk7
+    - rvm: rbx-19mode
+      jdk: oraclejdk7

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in tankard.gemspec
+gemspec

LICENSE.txt

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+Copyright (c) 2013 Matthew Shafer
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Rakefile

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+require "bundler/gem_tasks"
+require "rspec/core/rake_task"
+
+RSpec::Core::RakeTask.new(:spec)
+
+task default: :spec

lib/tankard.rb

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+require "tankard/version"
+require "tankard/configuration"
+require "tankard/error"
+require "tankard/client"
+require "atomic"
+
+module Tankard
+  @client = ::Atomic.new
+
+  class << self
+    include Configuration
+
+    def client
+      @client.compare_and_swap(nil, Tankard::Client.new(credentials)) unless @client.value
+      @client.value
+    end
+
+    def respond_to?(method)
+      return client.respond_to?(method)
+    end
+
+    private
+
+      def method_missing(method_name, *args, &block)
+        return super unless client.respond_to?(method_name)
+        client.send(method_name, *args, &block)
+      end
+  end
+end

lib/tankard/api/beer.rb

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+require 'hashie'
+
+module Tankard
+  module Api
+    class Beer
+      include ::Enumerable
+
+      def initialize(request, options={})
+        @request = request
+        @options = Hashie::Mash.new(options)
+      end
+
+      def each(&block)
+        find_on_single_page(block)
+      end
+
+      def find(beer_id, options={})
+        @options.merge!(options)
+
+        if beer_id.is_a?(Array)
+          beer_id.map { |beer| request_data_with_nil_on_error("beer/#{beer}", @options) }.compact
+        else
+          request_data_with_nil_on_error("beer/#{beer_id}", @options)
+        end
+      end
+
+      def id(beer_id)
+        @options.id = beer_id
+        self
+      end
+
+      def breweries
+        @options.endpoint = "breweries"
+        self
+      end
+
+      def events
+        @options.endpoint = "events"
+        self
+      end
+
+      def ingredients
+        @options.endpoint = "ingredients"
+        self
+      end
+
+      def social_accounts
+        @options.endpoint = "socialaccounts"
+        self
+      end
+
+      def variations
+        @options.endpoint = "variations"
+        self
+      end
+
+      private
+
+        def request_data_from_options
+          endpoint = "beer/#{raise_if_no_id_in_options}"
+
+          if @options.endpoint?
+            endpoint += "/#{@options.delete(:endpoint)}"
+          end
+
+          request_data_with_nil_on_error(endpoint, @options)
+        end
+
+        def raise_if_no_id_in_options
+          raise Tankard::Error::NoBeerId unless @options.id?
+          @options.delete(:id)
+        end
+
+        def find_on_single_page(block)
+          data = request_data_from_options
+          raise Tankard::Error::InvalidResponse unless data
+
+          if data.is_a?(Hash)
+            block.call(data)
+          else
+            data.each { |beer| block.call(beer) }
+          end
+        end
+
+        def request_data_with_nil_on_error(uri, options)
+          begin
+            @request.get(uri, options)["data"]
+          rescue Tankard::Error::HttpError
+            nil
+          end
+        end
+    end
+  end
+end

lib/tankard/api/beers.rb

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+require 'hashie'
+
+module Tankard
+  module Api
+    class Beers
+      include ::Enumerable
+
+      def initialize(request, options={})
+        @request = request
+        @options = Hashie::Mash.new(options)
+      end
+
+      def each(&block)
+        if options_have_page_set
+          find_on_single_page(block)
+        else
+          find_on_all_pages(block)
+        end
+      end
+
+      def name(beer_name)
+        @options[:name] = beer_name
+        self
+      end
+
+      def page(number)
+        @options[:p] = number
+        self
+      end
+
+      private
+
+        def options_have_page_set
+          # need to make the keys respond to both symbol and string
+          @options.has_key?(:p)
+        end
+
+        def find_on_all_pages(block)
+          page = 0
+          options = @options.clone
+          begin
+            page += 1
+            options[:p] = page
+            response = request_with_nil_on_error("beers", options)
+            total_pages = response["numberOfPages"]
+            data = response["data"]
+            data.each { |beer| block.call(beer) }
+          end while page < total_pages
+        end
+
+        def find_on_single_page(block)
+          data = request_data_with_nil_on_error("beers", @options)
+          raise Tankard::Error::InvalidResponse unless data
+
+          if data.is_a?(Hash)
+            block.call(data)
+          else
+            data.each { |beer| block.call(beer) }
+          end
+        end
+
+        def request_data_with_nil_on_error(uri, options)
+          request_body = request_with_nil_on_error(uri, options)
+          request_body ? request_body["data"] : nil
+        end
+
+        def request_with_nil_on_error(uri, options)
+          begin
+            @request.get(uri, options)
+          rescue Tankard::Error::HttpError
+            nil
+          end
+        end
+    end
+  end
+end

lib/tankard/client.rb

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+require 'tankard/request'
+require 'tankard/api/beer'
+require 'tankard/api/beers'
+
+module Tankard
+  class Client
+
+    def initialize(options={})
+      Tankard::Configuration::KEYS.each do |key|
+        instance_variable_set(:"@#{key}", options[key])
+      end
+
+      @tankard_request = Tankard::Request.new(@api_key)
+    end
+
+    def beer(options={})
+      Tankard::Api::Beer.new(@tankard_request, options)
+    end
+
+    def beers(options={})
+      Tankard::Api::Beers.new(@tankard_request, options)
+    end
+  end
+end

lib/tankard/configuration.rb

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+module Tankard
+  module Configuration
+    attr_writer :api_key
+
+    KEYS = [:api_key]
+    BREWERYDB_URL = "http://api.brewerydb.com/v2/"
+
+    def configure
+      yield self
+      validate_api_key!
+      self
+    end
+
+    def reset!
+      Tankard::Configuration::KEYS.each do |key|
+        instance_variable_set(:"@{key}", nil)
+      end
+    end
+
+    private
+
+      def credentials
+        {
+          api_key: @api_key
+        }
+      end
+
+      def validate_api_key!
+        unless @api_key.is_a?(String)
+          raise Tankard::Error::ConfigurationError, "api_key is not a string"
+        end
+      end
+  end
+end

lib/tankard/error.rb

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+module Tankard
+  module Error
+    ConfigurationError = Class.new(::StandardError)
+    NoBeerId = Class.new(::StandardError)
+    HttpError = Class.new(::StandardError)
+    LoadError = Class.new(::StandardError)
+    InvalidResponse = Class.new(::StandardError)
+  end
+end