Module: CommandSearch::Aliaser

Defined in:
lib/command_search/aliaser.rb

Class Method Summary collapse

Class Method Details

.alias(query, aliases) ⇒ Object 



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# File 'lib/command_search/aliaser.rb', line 42

def alias(query, aliases)
  aliases.reduce(query) { |q, (k, v)| alias_item(q, k, v) }
end

.alias_item(query, alias_key, alias_value) ⇒ Object 



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# File 'lib/command_search/aliaser.rb', line 19

def alias_item(query, alias_key, alias_value)
  if alias_key.is_a?(Regexp)
    pattern = alias_key
  else
    pattern = build_regex(alias_key.to_s)
  end
  current_match = query[pattern]
  return query unless current_match
  offset = Regexp.last_match.offset(0)
  head = query[0...offset.first]
  tail = alias_item(query[offset.last..-1], alias_key, alias_value)
  if opens_quote?(head)
    replacement = current_match
  else
    if alias_value.is_a?(String)
      replacement = alias_value
    elsif alias_value.is_a?(Proc)
      replacement = alias_value.call(current_match).to_s
    end
  end
  head + replacement + tail
end

.build_regex(str) ⇒ Object 



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# File 'lib/command_search/aliaser.rb', line 5

def build_regex(str)
  head_border = '(?<=^|[^:\w])'
  tail_border = '(?=$|\W)'
  Regexp.new(head_border + Regexp.escape(str) + tail_border, 'i')
end

.opens_quote?(str) ⇒ Boolean

Returns:



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# File 'lib/command_search/aliaser.rb', line 11

def opens_quote?(str)
  while str[/".*"/] || str[/'.*'/]
    mark = str[/["']/]
    str.sub(/#{mark}.*#{mark}/, '')
  end
  str[/"/] || str[/\B'/]
end