Added support for data URI

lib/carrierwave/neo4j-data-uri.rb

@@ -0,0 +1,6 @@
+require 'carrierwave'
+require 'neo4j'
+require "carrierwave/neo4j"
+require 'carrierwave/neo4j_data_uri/tempfile'
+require 'carrierwave/neo4j_data_uri/parser'
+require 'carrierwave/neo4j_data_uri/mount'

lib/carrierwave/neo4j_data_uri/mount.rb

@@ -0,0 +1,23 @@
+module CarrierWave
+  module Neo4j
+    extend ActiveSupport::Concern
+
+    module ClassMethods
+      include CarrierWave::Mount
+      ##
+      # See +CarrierWave::Mount#mount_uploader+ for documentation
+      #
+        def mount_uploader(column, uploader=nil, options={}, &block)
+          super
+
+          class_eval <<-RUBY, __FILE__, __LINE__+1
+            attr_accessor :#{column}_data_filename, :#{column}_data_mimetype
+
+            def #{column}_data_uri=(data)
+              self.#{column} = CarrierWave::Neo4j::DataUri::Parser.new(data).to_file original_filename: self.#{column}_data_filename, content_type: self.#{column}_data_mimetype
+            end
+          RUBY
+        end
+    end
+  end
+end

lib/carrierwave/neo4j_data_uri/parser.rb

@@ -0,0 +1,38 @@
+require 'base64'
+
+module CarrierWave
+  module Neo4j
+    module DataUri
+      class Parser
+        attr_reader :type, :encoder, :data, :extension
+
+        def initialize(data_uri)
+          if data_uri.match /^data:(.*?);(.*?),(.*)$/
+            @type = $1
+            @encoder = $2
+            @data = $3
+            @extension = $1.split('/')[1]
+          else
+            raise ArgumentError, 'Invalid data'
+          end
+        end
+
+        def binary_data
+          @binary_data ||= Base64.decode64 data
+        end
+
+        def to_file(options = {})
+          @file ||= begin
+            file = Tempfile.new ['data_uri_upload', ".#{extension}"]
+            file.binmode
+            file << binary_data
+            file.rewind
+            file.original_filename = options[:original_filename]
+            file.content_type = options[:content_type]
+            file
+          end
+        end
+      end
+    end
+  end
+end

lib/carrierwave/neo4j_data_uri/tempfile.rb

@@ -0,0 +1,19 @@
+require 'tempfile'
+
+module CarrierWave
+  module Neo4j
+    module DataUri
+      class Tempfile < ::Tempfile
+        attr_writer :original_filename, :content_type
+
+        def original_filename
+          @original_filename || File.basename(path)
+        end
+
+        def content_type
+          @content_type || MIME::Types.type_for(original_filename).first.content_type
+        end
+      end
+    end
+  end
+end