Class: Excise::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/excise/base.rb

Constant Summary collapse

TOKEN_EXPRESSION = 
/{([^{}\t\r\n]+)}/.freeze
SPECIAL_CHARACTERS_EXPRESSION = 
/[\\\^\$\*\+\.\?\(\)\[\]]/.freeze

Instance Method Summary collapse

Constructor Details

#initialize(pattern) ⇒ Base

Returns a new instance of Base.



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# File 'lib/excise/base.rb', line 8

def initialize(pattern)
  @pattern = pattern
end

Instance Method Details

#parse(string) ⇒ Object 



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# File 'lib/excise/base.rb', line 12

def parse(string)
  @matches = pattern_expression.match(string)

  output = {}

  tokens.each_with_index do |key, index|
    output[key.to_sym] = @matches[index+1]
  end

  output
end

#pattern_expression ⇒ Object 



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# File 'lib/excise/base.rb', line 28

def pattern_expression
  @pattern_expression ||= Regexp.new(@pattern.gsub(special_characters_expression, '\\\\\0').gsub(token_expression, "(\.+)"))
end

#special_characters_expression ⇒ Object 



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# File 'lib/excise/base.rb', line 36

def special_characters_expression
  SPECIAL_CHARACTERS_EXPRESSION
end

#token_expression ⇒ Object 



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# File 'lib/excise/base.rb', line 32

def token_expression
  TOKEN_EXPRESSION
end

#tokens ⇒ Object 



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# File 'lib/excise/base.rb', line 24

def tokens
  @tokens ||= @pattern.scan(token_expression).flatten
end