Class: Timeliness::Format

Inherits:
Object
  • Object
show all
Includes:
Helpers
Defined in:
lib/timeliness/format.rb

Constant Summary collapse

CompilationFailed = 
Class.new(StandardError)

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Helpers

#abbr_month_names, #full_hour, #i18n_loaded?, #microseconds, #month_index, #month_names, #offset_in_seconds, #unambiguous_year

Constructor Details

#initialize(format_string) ⇒ Format

Returns a new instance of Format.



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# File 'lib/timeliness/format.rb', line 9

def initialize(format_string)
  @format_string = format_string
end

Instance Attribute Details

#format_string ⇒ Object (readonly)

Returns the value of attribute format_string.



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# File 'lib/timeliness/format.rb', line 7

def format_string
  @format_string
end

#regexp ⇒ Object (readonly)

Returns the value of attribute regexp.



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# File 'lib/timeliness/format.rb', line 7

def regexp
  @regexp
end

#regexp_string ⇒ Object (readonly)

Returns the value of attribute regexp_string.



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# File 'lib/timeliness/format.rb', line 7

def regexp_string
  @regexp_string
end

#token_count ⇒ Object (readonly)

Returns the value of attribute token_count.



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# File 'lib/timeliness/format.rb', line 7

def token_count
  @token_count
end

Instance Method Details

#compile! ⇒ Object 



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# File 'lib/timeliness/format.rb', line 13

def compile!
  @token_count = 0
  found_tokens, token_order = [], []

  format = format_string.dup
  format.gsub!(/([\.\\])/, '\\\\\1') # escapes dots and backslashes

  # Substitute tokens with numbered placeholder
  Definitions.sorted_token_keys.each do |token|
    count = 0
    format.gsub!(token) do
      token_regexp_str, arg_key = Definitions.format_tokens[token]
      token_index = found_tokens.size

      if arg_key
        raise CompilationFailed, "Token '#{token}' was found more than once in format '#{format_string}'. This has unexpected effects should be removed." if count > 0
        count += 1

        token_regexp_str = "(#{token_regexp_str})"
        @token_count += 1
      end
      found_tokens << [ token_regexp_str, arg_key ]

      "%<#{token_index}>"
    end
  end

  # Replace placeholders with token regexps
  format.gsub!(/%<(\d+)>/) do
    token_regexp_str, arg_key = found_tokens[$1.to_i]
    token_order << arg_key
    token_regexp_str
  end

  define_process_method(token_order.compact)
  @regexp_string = format
  @regexp = Regexp.new("^(?>#{format})$")
  self
rescue => ex
  raise CompilationFailed, "The format '#{format_string}' failed to compile using regexp string #{format}. Error message: #{ex.inspect}"
end

#process(*args) ⇒ Object

Redefined on compile



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# File 'lib/timeliness/format.rb', line 56

def process(*args); end