Add log_level option (#39)

README.md

@@ -78,6 +78,18 @@ log_file.sync = true
 logger Logger.new GrapeLogging::MultiIO.new(STDOUT, log_file)
 ```
 
+### Set the log level
+
+You can control the level used to log. The default is `info`.
+
+```ruby
+class MyAPI < Grape::API
+  use GrapeLogging::Middleware::RequestLogger,
+    logger: logger,
+    log_level: 'debug'
+end
+```
+
 ### Logging via Rails instrumentation
 
 You can choose to not pass the logger to ```grape_logging``` but instead send logs to Rails instrumentation in order to let Rails and its configured Logger do the log job, for example.

lib/grape_logging/middleware/request_logger.rb

@@ -16,7 +16,7 @@ module GrapeLogging
         @reporter = if options[:instrumentation_key]
           Reporters::ActiveSupportReporter.new(@options[:instrumentation_key])
         else
-          Reporters::LoggerReporter.new(@options[:logger], @options[:formatter])
+          Reporters::LoggerReporter.new(@options[:logger], @options[:formatter], @options[:log_level])
         end
       end
 

lib/grape_logging/reporters/logger_reporter.rb

@@ -1,14 +1,15 @@
 module Reporters
   class LoggerReporter
-    def initialize(logger, formatter)
+    def initialize(logger, formatter, log_level)
       @logger = logger || Logger.new(STDOUT)
+      @log_level = log_level || :info
       if @logger.respond_to?(:formatter=)
         @logger.formatter = formatter || @logger.formatter || GrapeLogging::Formatters::Default.new
       end
     end
 
     def perform(params)
-      @logger.info params
+      @logger.send(@log_level, params)
     end
   end
 end

spec/lib/grape_logging/middleware/request_logger_spec.rb

@@ -38,6 +38,16 @@ describe GrapeLogging::Middleware::RequestLogger do
     end
   end
 
+  %w[info error debug].each do |level|
+    context "with level #{level}" do
+      it 'should log at correct level' do
+        options[:log_level] = level
+        expect(logger).to receive(level)
+        subject
+      end
+    end
+  end
+
   context 'with a nil response' do
     let(:app) { proc{ [500, {} , nil] } }
     it 'should log "fail" instead of a status' do