Initial commit

lib/barong/string.rb

@@ -0,0 +1,49 @@
+class String
+  CHARACTER_MAPPING = {
+    'ك' => 'ک',
+    'دِ' => 'د',
+    'بِ' => 'ب',
+    'زِ' => 'ز',
+    'ذِ' => 'ذ',
+    'شِ' => 'ش',
+    'سِ' => 'س',
+    'ى' => 'ی',
+    'ي' => 'ی',
+    '١' => '۱',
+    '٢' => '۲',
+    '٣' => '۳',
+    '٤' => '۴',
+    '٥' => '۵',
+    '٦' => '۶',
+    '٧' => '۷',
+    '٨' => '۸',
+    '٩' => '۹',
+    '٠' => '۰'
+  }.freeze
+
+  def to_persian
+    gsub(Regexp.union(CHARACTER_MAPPING.keys), CHARACTER_MAPPING)
+  end
+
+  def percent_match(mold)
+    mold = mold.to_s.to_persian
+    str = self.to_persian
+    char_cost = (100.to_f / length).round(2)
+    matching = 0
+    str_index = 0
+    mold_index = 0
+    str.each_char.with_index do |_char, index|
+      break if mold[mold_index].blank?
+
+      if mold[mold_index] != str[str_index]
+        mold_index = index - 1 if mold.length < str.length
+        str_index = index - 1 if mold.length > str.length
+      else
+        matching += char_cost
+      end
+      str_index += 1
+      mold_index += 1
+    end
+    matching.round
+  end
+end