Factor out the description-message-building in the runners.

[mailshears.git] / lib / common / runner.rb

diff --git a/lib/common/runner.rb b/lib/common/runner.rb
index c48f89a4f629168d657142871bc19f46ed781c27..b6fa2e86cafb0d5131bcc687f9edd7e387063814 100644 (file)
--- a/lib/common/runner.rb
+++ b/lib/common/runner.rb
@@ -1,5 +1,73 @@
+# Methods inherited by the various runner classes ({PruneRunner},
+# {MvRunner}, {RmRunner}).
+#

 module Runner
 module Runner

-  def run(plugin, targets)
+
+
+  # The main thing a runner does is <tt>run()</tt>. Each runner will
+  # actually take a different number of arguments, so their
+  # <tt>run()</tt> signatures will differ. This stub is only here to
+  # let you know that it needs to be implemented.
+  #
+  # @param args [Array<Object>] whatever arguments the real implementation
+  #   would take.
+  #
+  def run(*args)

     raise NotImplementedError
   end
     raise NotImplementedError
   end

+
+
+  # When we're describing a user or domain, we often want to output
+  # some additional description of it. But then, sometimes that
+  # additional description is pointless, like when it's exactly the
+  # same as the username that we're already outputting. This function
+  # determines whether or not *desc* is pointless for *target*.
+  #
+  # @param target [User,Domain] the user or domain described by *desc*.
+  #
+  # @param desc [String] a string description of *target*.
+  #
+  # @return [Boolean] true if *desc* is a pointless description of
+  #   *target* and false otherwise.
+  #
+  def pointless?(target, desc)
+    return (desc.nil? or desc.empty? or desc == target.to_s())
+  end
+
+
+  # If *desc* is not a pointless description of *target*, return the
+  # string representation of *target* followed by *desc* in
+  # parentheses. If *desc* is pointless, we return only the string
+  # representation of *target*
+  #
+  # @param target [User,Domain] the user or domain we want to describe
+  #   as a string.
+  #
+  # @param desc [String] a string description of *target*.
+  #
+  # @return [String] the string representation of *target*, possibly
+  #   followed by the non-pointless description *desc*.
+  #
+  def add_description(target, desc)
+    if pointless?(target, desc)
+      return target.to_s()
+    else
+      return target.to_s() + " (#{desc})"
+    end
+  end
+
+
+  # Report a message from the given *plugin*. All this does is prefix
+  # the message with the plugin name and then print it to stdout.
+  #
+  # @param plugin [Object] t plugin object that generated the message
+  #   we're reporting.
+  #
+  # @param msg [String] the message to report.
+  #
+  def report(plugin, msg)
+    print "#{plugin.class.to_s()} - "
+    puts msg
+  end
+

 end
 end