Basic models for Fizzy do and searches working with them

app/models/command/parser.rb

@@ -0,0 +1,15 @@
+class Command::Parser
+  attr_reader :user
+
+  def initialize(user)
+    @user = user
+  end
+
+  def parse(string)
+    if card = user.accessible_cards.find_by_id(string)
+      Command::GoToCard.new(card: card)
+    else
+      Command::Search.new(query: string)
+    end
+  end
+end