Class: Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/my_precious/parser.rb

Constant Summary collapse

WRITER_FILE = 
'output.rb'
PUT_KEYWORDS =

KEYWORDS LINE_KEYWORDS = [‘,’, ‘.’, ‘?’, ‘!’, ‘;’]

['bring forth the ring', 'says', 'screams', 'exclaims', 'sobbs', 'coughs']
COMMENT_KEYWORDS = 
['second breakfast', 'wear the ring']
ASSIGNMENT_KEYWORDS = 
['is', 'are', 'was', 'has']
INCREMENT_KEYWORDS = 
['eats lembas bread', 'fortifies stronghold', 'rests', 'recieves Evenstar', 'reforges Narsil']
DECREMENT_KEYWORDS = 
['runs out of lembas bread', 'lost', 'hunted by orcs']
ADDITION_KEYWORDS = 
['joins', 'join', 'and', 'accompanies']
SUBTRACTION_KEYWORDS = 
['leaves the fellowship', 'stabs', 'banishes', 'steals']
MULTIPLICATION_KEYWORDS = 
['gives aid to', 'procreates', 'bolsters']
DIVISION_KEYWORDS = 
['decapitates', 'dismembers']
COMPARISON_KEYWORDS = 
['equal', 'same', 'similar']
CONDITION_KEYWORDS = 
['does', 'if', 'will']
END_KEYWORDS = 
['you shall not pass']
TRUE_KEYWORDS = 
['precious']
LOOP_KEYWORDS = 
['whilst', 'during the journey']
GREATER_THAN_KEYWORDS = 
['stronger than', 'more']
LESS_THAN_KEYWORDS = 
['weaker than', 'less']
FUNCTION_DEF_KEYWORDS = 
['transcribe', 'tell a story']
FUNCTION_CALL_KEYWORDS = 
["theyre taking the hobbits to"]
PARAM_KEYWORDS = 
['with']
NEGATION_KEYWORDS = 
['not']
CLASS_KEYWORDS = 
['chapter']
OPERATOR_KEYWORDS = 
['#', '+', '-', '=', '*', '/', '+=1', '-=1', 'puts', '==', 'if', 'end', 'true', 'while', '>', '<', '!', 'def', '(', ')', 'class']
ALICIA_KEYS = 
[END_KEYWORDS, PUT_KEYWORDS, ASSIGNMENT_KEYWORDS, INCREMENT_KEYWORDS, DECREMENT_KEYWORDS, ADDITION_KEYWORDS, SUBTRACTION_KEYWORDS, DIVISION_KEYWORDS, MULTIPLICATION_KEYWORDS, COMPARISON_KEYWORDS, CONDITION_KEYWORDS, TRUE_KEYWORDS, LOOP_KEYWORDS, GREATER_THAN_KEYWORDS, LESS_THAN_KEYWORDS, NEGATION_KEYWORDS, FUNCTION_DEF_KEYWORDS, FUNCTION_CALL_KEYWORDS, CLASS_KEYWORDS]
MAP = 
[{'puts': PUT_KEYWORDS}, {'#': COMMENT_KEYWORDS}, {'=': ASSIGNMENT_KEYWORDS}, {'+=1': INCREMENT_KEYWORDS}, {'-=1': DECREMENT_KEYWORDS}, {'+': ADDITION_KEYWORDS}, {'-': SUBTRACTION_KEYWORDS}, {'*': MULTIPLICATION_KEYWORDS}, {'/': DIVISION_KEYWORDS}, {'==': COMPARISON_KEYWORDS}, {'if': CONDITION_KEYWORDS}, {'end': END_KEYWORDS}, {'true': TRUE_KEYWORDS}, {'while': LOOP_KEYWORDS}, {'>': GREATER_THAN_KEYWORDS}, {'<': LESS_THAN_KEYWORDS}, {'!': NEGATION_KEYWORDS}, {'def': FUNCTION_DEF_KEYWORDS}, {'': FUNCTION_CALL_KEYWORDS},{'(': PARAM_KEYWORDS}, {'class': CLASS_KEYWORDS}]

Class Method Summary collapse

Class Method Details

.check_for_keywords(line) ⇒ Object 



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# File 'lib/my_precious/parser.rb', line 121

def self.check_for_keywords(line)
  ALICIA_KEYS.each do |keywords|
    line = parse(line, keywords)
  end
  line
end

.find_replacement(keywords) ⇒ Object 



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# File 'lib/my_precious/parser.rb', line 201

def self.find_replacement(keywords)
  MAP.each do |hash|
    hash.each do |key, value|
      if value == keywords
        return key.to_s
      end
    end
  end
  return nil
end

.format_function(line) ⇒ Object 



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# File 'lib/my_precious/parser.rb', line 212

def self.format_function(line)
  phrase_array = line.split('')
  index = phrase_array.find_index { |i| i == "("}
  phrase_array.delete_at(index - 1)
  phrase_array.delete_at(index - 2)
  phrase_array.join("")
end

.get_quote(phrase) ⇒ Object 



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# File 'lib/my_precious/parser.rb', line 179

def self.get_quote(phrase)
  phrase_array = phrase.split('')
  index = phrase_array.find_index { |i| i == '"'} + 1
  quote = ""
  while phrase_array[index] != '"'
    quote << phrase_array[index]
    index += 1
  end
  quote
end

.only_valuable_words(line) ⇒ Object 



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# File 'lib/my_precious/parser.rb', line 147

def self.only_valuable_words(line)
  important_words = []
  line_array = line.split(" ")
  line_array.each do |word|
    valuable_word = valuable?(word)
    if valuable_word
      important_words << word
    end
  end
  line = important_words.join(" ")
end

.parse(line, keywords) ⇒ Object

METHODS



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# File 'lib/my_precious/parser.rb', line 129

def self.parse(line, keywords)
  keywords.each do |keyword|
    if line.include? keyword
      replacement = find_replacement(keywords)
      line = line.gsub(keyword, replacement)
    end
  end
  return line
end

.parse_file(file, output_file_name) ⇒ Object 



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# File 'lib/my_precious/parser.rb', line 32

def self.parse_file(file, output_file_name)
  str = ""
  writer_file_name = output_file_name
  file.each_with_index do |file, index|
    file.each_line do |line|
      line = parse_line(line, index)
      str << (line + "\n")
    end
  end
  write(str, writer_file_name)
end

.parse_line(line, index) ⇒ Object 



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# File 'lib/my_precious/parser.rb', line 44

def self.parse_line(line, index)
  #error handeling
  #ignore lines of length 1, its empty
  if line.length == 1
    # write("#{line}")
    return line
  else

  #check if there are strings in line
  quote = ""
  if line.include? '"'
    quote = get_quote(line)
    line = line.gsub(quote, 'quote_placeholder')
  end

  #check if line is a comment
  comment = ""
  if COMMENT_KEYWORDS.any? { |word| line.include?(word) }
    line = parse(line, COMMENT_KEYWORDS)
    comment = store_important(line, '#')
    line = line.gsub(comment, 'comment_placeholder')
  end

  #check if line has params
  params = ""
  if ((PARAM_KEYWORDS.any? { |word| line.include?(word) }) &&
    ((FUNCTION_DEF_KEYWORDS.any? { |word| line.include?(word) }) ||
    (FUNCTION_CALL_KEYWORDS.any? { |word| line.include?(word) })))
    line = parse(line, PARAM_KEYWORDS)
    params = remove_newline(store_important(line, '('))
    line = line.gsub(params, 'param_placeholder ')  + ')'
  end

  class_word = ""
  if CLASS_KEYWORDS.any? { |word| line.include?(word) }
    line = parse(line, CLASS_KEYWORDS)
    class_word = store_important(line, ':')
    line = line.gsub(class_word, ' class_word_placeholder')
  end

  #get rid of special chars
  line_array = line.split(" ")
  line_array.each_with_index do |word, index|
    line_array[index] = purify(word)
  end

  #check for keywords
  #calls if statements
  line = line_array.join(" ")
  line = check_for_keywords(line)

  #remove extra english words
  line = only_valuable_words(line).downcase

  #put string back into line
  if line.include? ('"quote_placeholder"')
    line = line.gsub('quote_placeholder', quote)
  end

  if line.include? ('comment_placeholder')
    line = line.gsub('comment_placeholder', comment)
  end

  if line.include? ('param_placeholder')
    line = line.gsub('param_placeholder', params.downcase)
    line = format_function(line)
  end

  if line.include? ('class_word_placeholder')
    line = line.gsub('class_word_placeholder', "#{class_word}")
  end

  # write("#{line}")
  return line
  end
end

.purify(word) ⇒ Object 



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# File 'lib/my_precious/parser.rb', line 139

def self.purify(word)
  word = word.gsub(/[!@%&.?,]/,'')# get rid of special chars
end

.remove_newline(line) ⇒ Object 



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# File 'lib/my_precious/parser.rb', line 143

def self.remove_newline(line)
  line.gsub(/\n/, "")
end

.store_important(phrase, key) ⇒ Object 



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# File 'lib/my_precious/parser.rb', line 190

def self.store_important(phrase, key)
  phrase_array = phrase.split('')
  index = phrase_array.find_index { |i| i == key} + 1
  string = ""
  while index < phrase_array.length
    string << phrase_array[index]
    index += 1
  end
  string
end

.valuable?(word) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/my_precious/parser.rb', line 159

def self.valuable?(word)
  valuable = false
  if /[[:upper:]]/.match(word[0]) #if variable
    valuable = true
  elsif word == '"quote_placeholder"' #if string/quote
    valuable = true
  elsif word == '#comment_placeholder' #if comment
    valuable = true
  elsif word == '(param_placeholder' #if params
    valuable = true
  elsif word == 'class_word_placeholder' #if class
    valuable = true
  elsif word.to_i.to_s == word #if num
    valuable = true
  elsif OPERATOR_KEYWORDS.include? word #if operator
    valuable = true
  end
  valuable
end

.write(str, writer_file_name) ⇒ Object 



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# File 'lib/my_precious/parser.rb', line 220

def self.write(str, writer_file_name)
  writer_file = File.open(writer_file_name, 'w')
  writer_file.write(str)
end