Module: JalaliDateParser

Defined in:
lib/jalali_date_parser.rb

Defined Under Namespace

Classes: ParseError

Constant Summary collapse

PERSIAN_DIGITS = 
"۰۱۲۳۴۵۶۷۸۹"
ENGLISH_DIGITS = 
"0123456789"
ARABIC_DIGITS = 
"٠١٢٣٤٥٦٧٨٩"
MONTHS = 
{
  "فروردین" => 1,
  "اردیبهشت" => 2,
  "خرداد" => 3,
  "تیر" => 4,
  "مرداد" => 5,
  "شهریور" => 6,
  "مهر" => 7,
  "آبان" => 8,
  "آذر" => 9,
  "دی" => 10,
  "بهمن" => 11,
  "اسفند" => 12
}.freeze
COMMON_PATTERNS = 
[
  # 1403/01/15
  # 1403-01-15
  # 1403.01.15
  {
    regex: /
      (?<year>\d{4})
      [\/\-.]
      (?<month>\d{1,2})
      [\/\-.]
      (?<day>\d{1,2})
      (?:[T\s]+(?<time>\d{1,2}:\d{1,2}(?::\d{1,2})?))?
    /x
  },

  # 15/01/1403
  # 15-01-1403
  {
    regex: /
      (?<day>\d{1,2})
      [\/\-.]
      (?<month>\d{1,2})
      [\/\-.]
      (?<year>\d{4})
      (?:[T\s]+(?<time>\d{1,2}:\d{1,2}(?::\d{1,2})?))?
    /x
  },

  # 15 فروردین 1403
  # فروردین 15 1403
  {
    regex: /
      (?:
        (?<day>\d{1,2})\s+
        (?<month_name>[[:word:]\p{Arabic}]+)\s+
        (?<year>\d{4})
        |
        (?<month_name2>[[:word:]\p{Arabic}]+)\s+
        (?<day2>\d{1,2})\s+
        (?<year2>\d{4})
      )
      (?:.*?(?<time>\d{1,2}:\d{1,2}(?::\d{1,2})?))?
    /x
  }
].freeze

Class Method Summary collapse

Class Method Details

.extract_time(time_str) ⇒ Object 



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# File 'lib/jalali_date_parser.rb', line 162

def extract_time(time_str)
  return [0, 0, 0] unless time_str

  parts = time_str.split(":").map(&:to_i)

  [
    parts[0] || 0,
    parts[1] || 0,
    parts[2] || 0
  ]
end

.normalize(str) ⇒ Object 



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# File 'lib/jalali_date_parser.rb', line 142

def normalize(str)
  s = str.dup

  # Persian/Arabic digits → English
  s.tr!(PERSIAN_DIGITS, ENGLISH_DIGITS)
  s.tr!(ARABIC_DIGITS, ENGLISH_DIGITS)

  # Normalize Arabic chars
  s.gsub!("ي", "ی")
  s.gsub!("ك", "ک")

  # Remove extra words
  s.gsub!(/ساعت|در|،/, " ")

  # Normalize whitespace
  s.gsub!(/\s+/, " ")

  s.strip
end

.parse(input) ⇒ Object

Raises:



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# File 'lib/jalali_date_parser.rb', line 99

def parse(input)
  raise ParseError, "Empty input" if input.nil? || input.strip.empty?

  str = normalize(input)

  COMMON_PATTERNS.each do |pattern|
    match = str.match(pattern[:regex])
    next unless match

    year  = (match[:year] || match[:year2]).to_i
    day   = (match[:day] || match[:day2]).to_i

    month =
      if match.names.include?("month")
        match[:month].to_i
      else
        MONTHS[match[:month_name] || match[:month_name2]]
      end

    hour, min, sec = extract_time(match[:time])

    validate!(year, month, day, hour, min, sec)

    jdate = JalaliDate.new(year, month, day, hour, min, sec)
    gdate = jdate.to_gregorian.to_datetime

    return {
      jalali: jdate,
      gregorian: gdate,
      components: {
        year: year,
        month: month,
        day: day,
        hour: hour,
        min: min,
        sec: sec
      }
    }
  end

  raise ParseError, "Unsupported Jalali date format: #{input}"
end

.validate!(year, month, day, hour, min, sec) ⇒ Object

Raises:



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# File 'lib/jalali_date_parser.rb', line 174

def validate!(year, month, day, hour, min, sec)
  raise ParseError, "Invalid year" unless year > 0
  raise ParseError, "Invalid month" unless month.between?(1, 12)
  raise ParseError, "Invalid day" unless day.between?(1, 31)
  raise ParseError, "Invalid hour" unless hour.between?(0, 23)
  raise ParseError, "Invalid minute" unless min.between?(0, 59)
  raise ParseError, "Invalid second" unless sec.between?(0, 59)
end