Initial import

lib/openlib.rb

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+# frozen_string_literal: true
+
+require 'openlib/version'
+require 'openlib/client'
+require 'openlib/book'
+
+module Openlib
+  ID_KINDS = %i[isbn oclc lccn olid].freeze
+  
+  class Error < StandardError; end
+  # Your code goes here...
+  
+  
+end

lib/openlib/book.rb

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+require 'json'
+
+module Openlib
+  class Book    
+    def initialize(id, id_kind: :isbn, user_agent: nil)
+      @id = id
+      @id_kind= id_kind.to_sym
+      @client = Openlib::Client.new(user_agent: user_agent)
+      @view = nil
+      @data = nil
+    end
+
+    ##
+    # Check that we got back the expected data
+    def view
+      @view ||= @client.get(id: @id, id_kind: @id_kind, format: 'viewapi')
+    end
+
+    def data
+      @data ||= @client.get(id: @id, id_kind: @id_kind, format: 'data')
+    end
+
+    def view_data(req: )
+      view.first.last.dig(req.to_s)
+    end
+
+    def data_data(req:)
+      case req
+      when :authors, :publishers, :subjects then data.first.last.dig(req.to_s).map {|p| p.dig('name') }
+      else
+        data.first.last.dig(req.to_s)
+      end
+    end
+    
+    def author
+      authors
+    end
+
+    def method_missing(m, *args, &block)      
+      case m
+      when :info_url, :preview, :preview_url, :thumbnail_url 
+        then self.send('view_data', req: m)
+      when :url, :authors, :identifiers, :classifications, :subjects,
+        :subject_places, :subject_people, :subject_times, :publishers,
+        :publish_places, :publish_date, :excerpts, :links, :cover, :ebooks,
+        :number_of_pages, :weight, :title
+        then self.send('data_data', req: m)
+      else
+        super
+      end
+    end
+ 
+  end
+end

lib/openlib/client.rb

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+# frozen_string_literal: true
+
+module Openlib
+  require 'open-uri'
+  USER_AGENT = "Ruby OpenLib/#{Openlib::VERSION}"
+
+  class Client
+    def initialize(user_agent: nil)
+      @user_agent = user_agent || USER_AGENT
+    end
+
+    def get(id:, format: 'data', id_kind: :isbn)
+      raise ArgumetError, "Kind must be one of #{ID_KINDS}"       unless ID_KINDS.include?(id_kind)
+      
+      resp = URI.open( "https://openlibrary.org/api/books?jscmd=#{format}&format=json&bibkeys=#{id_kind.to_s.upcase}#{id}", 'User-Agent' => @user_agent )
+      
+      byebug unless resp.status.first == '200'
+      
+      JSON.parse(resp.read)
+    end
+
+  end
+end

lib/openlib/version.rb

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+module Openlib
+  VERSION = "0.1.0"
+end