Class: Habakiri

Inherits:
Object
  • Object
show all
Defined in:
lib/habakiri.rb,
lib/habakiri/version.rb

Constant Summary collapse

VERSION = 
'0.1.0'.freeze

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(prefix = '{{', suffix = '}}') ⇒ Habakiri

Returns a new instance of Habakiri.



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# File 'lib/habakiri.rb', line 5

def initialize(prefix = '{{', suffix = '}}')
  @prefix = prefix
  @suffix = suffix
end

Class Method Details

.exec(template, text) ⇒ Object 



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# File 'lib/habakiri.rb', line 40

def exec(template, text)
  new.exec(template, text)
end

Instance Method Details

#exec(template, text) ⇒ Object 



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# File 'lib/habakiri.rb', line 10

def exec(template, text)
  diffs = Diff::LCS.sdiff(template.to_s, text.to_s)
  matches = template.to_enum(:scan, /#{@prefix}.+?#{@suffix}/).map{ Regexp.last_match }

  matches.each.with_object({}){|match, object|
    start = match.begin(0)
    last = match.end(0)
    range = start...last
    list = diffs.select{|d| range.include?(d.old_position) }

    # 改行後の追加要素も対応する文字列とみなす
    i = diffs.index{|d| d.old_position == last }
    if i
      loop do
        diff = diffs[i]
        if diff && (diff.action == '+' || (diff.action == '=' && /\R/.match?(diff.old_element)))
          list.push(diff)
          i += 1
        else
          break
        end
      end
    end

    key = match[0].delete_prefix(@prefix).delete_suffix(@suffix).chomp
    object[key] = list.map(&:new_element).join.strip
  }
end