Update the postgresql cookbook

cookbooks/postgresql/resources/extension.rb

@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 #
 # Cookbook:: postgresql
 # Resource:: extension
@@ -16,42 +15,35 @@
 # limitations under the License.
 #
 
-include Opscode::PostgresqlHelpers
+property :extension,        String, name_property: true
+property :old_version,      String
+property :version,          String
 
-# name property should take the form:
-# database/extension
-
-property :database, String,
-         required: true,
-         default: lazy { name.scan(%r{\A[^/]+(?=/)}).first }
-
-property :extension, String,
-         required: true,
-         default: lazy { name.scan(%r{(?<=/)[^/]+\Z}).first }
+# Connection prefernces
+property :user,     String, default: 'postgres'
+property :database, String, required: true
+property :host,     [String, nil]
+property :port,     Integer, default: 5432
 
 action :create do
-  bash "CREATE EXTENSION #{name}" do
-    code psql("CREATE EXTENSION IF NOT EXISTS \"#{extension}\"")
+  bash "CREATE EXTENSION #{new_resource.name}" do
+    code create_extension_sql(new_resource)
     user 'postgres'
     action :run
-    not_if { extension_installed? }
+    not_if { follower? || extension_installed?(new_resource) }
   end
 end
 
 action :drop do
-  bash "DROP EXTENSION #{name}" do
-    code psql("DROP EXTENSION IF EXISTS \"#{extension}\"")
+  bash "DROP EXTENSION #{new_resource.name}" do
+    code psql_command_string(new_resource, "DROP EXTENSION IF EXISTS \"#{new_resource.extension}\"")
     user 'postgres'
     action :run
-    only_if { extension_installed? }
+    not_if { follower? }
+    only_if { extension_installed?(new_resource) }
   end
 end
 
-def psql(query)
-  "psql -d #{database} <<< '\\set ON_ERROR_STOP on\n#{query};'"
-end
-
-def extension_installed?
-  query = "SELECT 'installed' FROM pg_extension WHERE extname = '#{extension}';"
-  !(execute_sql(query, database) =~ /^installed$/).nil?
+action_class do
+  include PostgresqlCookbook::Helpers
 end