Allow using regexp for model_map and group_map keys

Use case is that the source returns string which has unrelated and variant data
but the actual model is included somewhere in this data

For example source could have space separated list of tags and one of these
tags could be model name. Eg 'procurve switch'.

CHANGELOG.md

@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 ### Added
 - junos: add unit test (@systeembeheerder)
 - apc_aos: support for scp (@robertcheramy)
+- config: allow model_map and group_map keys to be regexp. Fixes #3361 (@ytti)
 
 ### Changed
 - sonicos: accept policy message. Fixes #3339 (@Steve-M-C, @robertcheramy)

docs/Configuration.md

@@ -226,6 +226,7 @@ source:
 model_map:
   cisco: ios
   juniper: junos
+  !ruby/regexp /procurve/: procurve
 ```
 
 ## Advanced Group Configuration

lib/oxidized/source/source.rb

@@ -8,12 +8,20 @@ def initialize
         @group_map = Oxidized.config.group_map || {}
       end
 
+      def map_value(map_hash, original_value)
+        map_hash.each do |key, new_value|
+          mthd = key.instance_of?(Regexp) ? :match : :eql?
+          return new_value if original_value.send(mthd, key)
+        end
+        original_value
+      end
+
       def map_model(model)
-        @model_map.has_key?(model) ? @model_map[model] : model
+        map_value(@model_map, model)
       end
 
       def map_group(group)
-        @group_map.has_key?(group) ? @group_map[group] : group
+        map_value(@group_map, group)
       end
 
       def node_var_interpolate(var)

spec/source/source_spec.rb

@@ -0,0 +1,32 @@
+require_relative '../spec_helper'
+require 'oxidized/source/source'
+
+describe Oxidized::Source do
+  describe '#map_model' do
+    before(:each) do
+      Asetus.any_instance.expects(:load)
+      Asetus.any_instance.expects(:create).returns(false)
+
+      # Set :home_dir to make sure the OXIDIZED_HOME environment variable is not used
+      Oxidized::Config.load({ home_dir: '/cfg_path/' })
+      yaml = %(
+        juniper: junos
+        !ruby/regexp /procurve/: procurve
+      )
+      Oxidized.config.model_map = YAML.unsafe_load(yaml)
+      @source = Oxidized::Source::Source.new
+    end
+
+    it 'returns map value for existing string key' do
+      _(@source.map_model('juniper')).must_equal 'junos'
+    end
+
+    it 'returns its argument for non-existing string key' do
+      _(@source.map_model('ios')).must_equal 'ios'
+    end
+
+    it 'returns map value for existing regexp key' do
+      _(@source.map_model('foo procurve1234 bar')).must_equal 'procurve'
+    end
+  end
+end