Class: Logbert::LevelManager

Inherits:
Module
  • Object
show all
Defined in:
lib/logbert/levels.rb

Overview

This class doubles as a mixin. Bazinga!

Instance Method Summary collapse

Constructor Details

#initialize ⇒ LevelManager

Returns a new instance of LevelManager.



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# File 'lib/logbert/levels.rb', line 29

def initialize
  @name_to_level  = {}
  @value_to_level = {}

  @quick_lookup   = {}
  
  Logbert::DefaultLevels.each{|name, value| self.define_level(name, value)}
end

Instance Method Details

#[](x) ⇒ Object 



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# File 'lib/logbert/levels.rb', line 72

def [](x)
  @quick_lookup[x] or begin
    if x.is_a? Integer
      # Return either the pre-defined level, or produce a virtual level.
      level = @value_to_level[x] || Logbert::Level.new("LEVEL_#{x}".to_sym, x)
      return level
    elsif x.is_a? String
      level = @name_to_level[x.to_sym]
      return level if level
    end
    
    raise KeyError, "No Level could be found for input: #{x}"
  end
end

#define_level(name, value) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/logbert/levels.rb', line 51

def define_level(name, value)
  unless name.instance_of?(Symbol) or name.instance_of?(String)
    raise ArgumentError, "The Level's name must be a Symbol or a String"
  end
  raise ArgumentError, "The Level's value must be an Integer" unless value.is_a? Integer
  
  # TODO: Verify that the name/value are not already taken
  raise KeyError, "A Level with that name is already defined: #{name}" if @name_to_level.has_key? name
  raise KeyError, "A Level with that value is already defined: #{value}" if @value_to_level.has_key? value
  
  level = Level.new(name, value)

  @name_to_level[name]   = level
  @value_to_level[value] = level
  @quick_lookup[name] = @quick_lookup[value] = @quick_lookup[level] = level
  
  self.create_logging_method(name)
  self.create_predicate_method(name, value)
end

#levels ⇒ Object 



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# File 'lib/logbert/levels.rb', line 46

def levels
  @name_to_level.values
end

#names ⇒ Object 



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# File 'lib/logbert/levels.rb', line 38

def names
  @name_to_level.keys
end

#values ⇒ Object 



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# File 'lib/logbert/levels.rb', line 42

def values
  @value_to_level.keys
end