Class: Mercury::CLI::Logger

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/mercury/cli/logger.rb

Overview

Mercury::CLI::Logger is a singleton class responsible for generating feedback in the terminal.

Constant Summary collapse

ACTION_COLORS = 
{
  :create         => "\e[1m" + "\e[32m", # bold + green
  :update         => "\e[1m" + "\e[33m", # bold + yellow
  :identical      => "\e[1m",            # bold
  :skip           => "\e[1m",            # bold
  :'not written'  => "\e[1m"             # bold
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Logger

Returns a new instance of Logger.



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# File 'lib/mercury/cli/logger.rb', line 43

def initialize
  @level = :high
  @color = true
end

Instance Attribute Details

#color ⇒ Object Also known as: color?

Whether to use color in log messages or not



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# File 'lib/mercury/cli/logger.rb', line 40

def color
  @color
end

#level ⇒ Object

The log level, which can be :high, :low or :off (which will log all messages, only high-priority messages, or no messages at all, respectively).



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# File 'lib/mercury/cli/logger.rb', line 37

def level
  @level
end

Instance Method Details

#file(level, action, identifier, duration = nil) ⇒ Object

Logs a file-related action.

level

The importance of this action. Can be :high or :low.

action

The kind of file action. Can be :create, :update or :identical.

identifier

The identifier of the item the action was performed on.



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# File 'lib/mercury/cli/logger.rb', line 56

def file(level, action, identifier, duration=nil)
  log(
    level,
    '%s%12s%s  %s%s' % [
      color? ? ACTION_COLORS[action.to_sym] : '',
      action,
      color? ? "\e[0m" : '',
      duration.nil? ? '' : "[%2.2fs]  " % [ duration ],
      identifier
    ]
  )
end

#log(level, s, io = $stdout) ⇒ Object

Logs a message.

level

The importance of this message. Can be :high or :low.

s

The message to be logged.

io

The IO instance to which the message will be written. Defaults to standard output.



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# File 'lib/mercury/cli/logger.rb', line 77

def log(level, s, io=$stdout)
  # Don't log when logging is disabled
  return if @level == :off

  # Log when level permits it
  io.puts(s) if (@level == :low or @level == level)
end