bin/burglar in burglar-0.0.2 vs bin/burglar in burglar-0.0.3

@@ -2,10 +2,11 @@
 
 require 'burglar'
 require 'mercenary'
 require 'cymbal'
 require 'yaml'
+require 'date'
 
 def add_common_opts(c)
   c.option :config, '-c FILE', '--config FILE', 'Config file to load'
   c.option :begin, '-b DATE', '--begin DATE', 'Beginning of date range'
   c.option :end, '-e DATE', '--end DATE', 'End of date range'
@@ -15,19 +16,24 @@
   file ||= '~/.burglar.yml'
   file = File.expand_path file
   Cymbal.symbolize YAML.safe_load(File.read(file))
 end
 
+def date_parse_or_default(string, default)
+  return default unless string
+  Date.parse(string)
+end
+
 Mercenary.program(:burglar) do |p|
   p.version Burglar::VERSION
   p.description 'Load data from banks'
   p.syntax 'burglar [options]'
 
   add_common_opts(p)
 
   p.action do |_, options|
-    options[:end] ||= Date.today
-    options[:begin] ||= options[:end] - 30
+    options[:end] = date_parse_or_default(options[:end], Date.today)
+    options[:begin] = date_parse_or_default(options[:begin], options[:end])
     config = load_config(options[:config]).merge(options)
     puts Burglar.new(config).transactions
   end
 end