module ErbLatex

    module File

        # simualar to File.read, except:
        #   * Will search in_directory for file if given, otherwise expects file to be an absolute path
        #   * appends ErbLatex.config.file_extension to the file if it's not found as-is.
        def self.read(file, in_directory = nil)
            if in_directory
                file = Pathname.new(in_directory.to_s).join(file)
            end
            unless file.exist?
                file = Pathname.new(file.to_s + ErbLatex.config.file_extension) unless file.exist?
            end
            unless file.exist?
                msg = "Unable to read from #{@view.to_s}.  Also tried extension #{ErbLatex.config.file_extension}"
                raise LatexError.new(msg)
            end
            file.read
        end

        def self.evaluate(file, context_binding, directory = nil)
            ::ERB.new( self.read(file, directory), 0, '-' ).result( context_binding )
        end

    end

end