Stub out dns provider usage

lib/vmpooler/dns.rb

@@ -0,0 +1,67 @@
+require 'pathname'
+
+module Vmpooler
+  class Dns
+
+    # Load one or more VMPooler DNS plugin gems by name
+    #
+    # @param names [Array<String>] The list of gem names to load
+    def self.load_by_name(names)
+      names = Array(names)
+      instance = new
+      names.map { |name| instance.load_from_gems(name) }.flatten
+    end
+
+    # Returns the plugin class for the specified dns config by name
+    #
+    # @param config [Object] The entire VMPooler config object
+    # @param name [Symbol] The name of the dns config key to get the dns class
+    # @return [String] The plugin class for the specifid dns config
+    def self.get_dns_plugin_class_by_name(config, name)
+      dns_configs = config[:dns_configs].keys
+      plugin_class = ''
+
+      dns_configs.map do |dns_config_name|
+        if dns_config_name.to_s == name
+          plugin_class = config[:dns_configs][dns_config_name]['dns_class']
+        end
+      end
+
+      plugin_class
+    end
+
+    # Returns a list of DNS plugin classes specified in the vmpooler configuration
+    #
+    # @param config [Object] The entire VMPooler config object
+    # @return [Array<String] A list of DNS plugin classes
+    def self.get_dns_plugin_config_classes(config)
+      if config[:dns_configs]
+        dns_configs = config[:dns_configs].keys
+        dns_plugins = dns_configs.map do |dns_config_name|
+          if config[:dns_configs][dns_config_name] && config[:dns_configs][dns_config_name]['dns_class']
+            config[:dns_configs][dns_config_name]['dns_class'].to_s
+          else
+            dns_config_name.to_s
+          end
+        end.compact.uniq
+        
+        # dynamic-dns is not actually a class, it's just used as a value to denote
+        # that dynamic dns is used so no loading or record management is needed
+        dns_plugins.delete('dynamic-dns')
+      end
+
+      dns_plugins
+    end
+
+    # Load a single DNS plugin gem by name
+    #
+    # @param name [String] The name of the DNS plugin gem to load
+    # @return [String] The full require path to the specified gem
+    def load_from_gems(name = nil)
+      require_path = 'vmpooler/dns/' + name.gsub('-', '/')
+      require require_path
+      $logger.log('d', "[*] [dns_manager] Loading DNS plugins from dns_configs: #{name}")
+      require_path
+    end
+  end
+end