From 6248963662e938fb9274ecaec7a11ff97eed2ce7 Mon Sep 17 00:00:00 2001
From: Seth Faxon <seth.faxon@gmail.com>
Date: Mon, 22 Aug 2011 11:58:08 -0700
Subject: [PATCH] adding error classes for better error messages

---
 lib/remote_book/amazon.rb           | 6 ++++++
 lib/remote_book/barnes_and_noble.rb | 3 +++
 lib/remote_book/base.rb             | 2 ++
 3 files changed, 11 insertions(+)

diff --git a/lib/remote_book/amazon.rb b/lib/remote_book/amazon.rb
index a65989a..f3aa3c4 100644
--- a/lib/remote_book/amazon.rb
+++ b/lib/remote_book/amazon.rb
@@ -1,4 +1,7 @@
 module RemoteBook
+  class AmazonError < RemoteBook::RemoteBookError #:nodoc:
+  end
+
   class Amazon < RemoteBook::Base
     # FIXME: failed digest support should raise exception.
     # mac os 10.5 does not ship with SHA256 support built into ruby, 10.6 does. 
@@ -8,6 +11,9 @@ class Amazon < RemoteBook::Base
     attr_accessor :large_image, :medium_image, :small_image, :authors, :title
 
     def self.find(options)
+      raise AmazonError.new("RemoteBook::Amazon.associate_keys requires :key_id") unless associate_keys.has_key?(:key_id)
+      raise AmazonError.new("RemoteBook::Amazon.associate_keys requires :associates_id") unless associate_keys.has_key?(:associates_id)
+      raise AmazonError.new("RemoteBook::Amazon.associate_keys requires :secret_key") unless associate_keys.has_key?(:secret_key)
       a = new
       # unless DIGEST_SUPPORT raise "no digest sup"
       if options[:isbn]
diff --git a/lib/remote_book/barnes_and_noble.rb b/lib/remote_book/barnes_and_noble.rb
index 129dece..4b21354 100644
--- a/lib/remote_book/barnes_and_noble.rb
+++ b/lib/remote_book/barnes_and_noble.rb
@@ -1,4 +1,7 @@
 module RemoteBook
+  class BarnesAndNobleError < RemoteBook::RemoteBookError #:nodoc:
+  end
+
   class BarnesAndNoble < RemoteBook::Base
     ISBN_SEARCH_BASE_URI = "http://search.barnesandnoble.com/booksearch/isbnInquiry.asp?ISBSRC=Y&ISBN="
     LINK_SHARE_DEEP_LINK_BASE = "http://getdeeplink.linksynergy.com/createcustomlink.shtml"
diff --git a/lib/remote_book/base.rb b/lib/remote_book/base.rb
index 1cf2b1b..9447e74 100644
--- a/lib/remote_book/base.rb
+++ b/lib/remote_book/base.rb
@@ -28,4 +28,6 @@ def find(options)
       end
     end
   end
+  class RemoteBookError < StandardError #:nodoc:
+  end
 end