50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
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"""تبدیل تاریخ میلادی به شمسی برای نمایش تاریخ انتشار مقاله — بدون وابستگی
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به پکیج خارجی (همان الگوریتم استاندارد تبدیل جلالی)."""
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_PERSIAN_MONTHS = [
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"فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور",
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"مهر", "آبان", "آذر", "دی", "بهمن", "اسفند",
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]
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_PERSIAN_DIGITS = str.maketrans("0123456789", "۰۱۲۳۴۵۶۷۸۹")
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def gregorian_to_jalali(date) -> tuple[int, int, int]:
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gy, gm, gd = date.year, date.month, date.day
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g_days_in_month = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
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gy2 = gy - 1600
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gm2 = gm - 1
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gd2 = gd - 1
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g_day_no = 365 * gy2 + (gy2 + 3) // 4 - (gy2 + 99) // 100 + (gy2 + 399) // 400
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for i in range(gm2):
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g_day_no += g_days_in_month[i]
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if gm2 > 1 and ((gy % 4 == 0 and gy % 100 != 0) or gy % 400 == 0):
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g_day_no += 1
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g_day_no += gd2
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j_day_no = g_day_no - 79
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j_np = j_day_no // 12053
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j_day_no %= 12053
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jy = 979 + 33 * j_np + 4 * (j_day_no // 1461)
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j_day_no %= 1461
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if j_day_no >= 366:
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jy += (j_day_no - 1) // 365
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j_day_no = (j_day_no - 1) % 365
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j_days_in_month = [31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29]
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jm = 0
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for i, days in enumerate(j_days_in_month):
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if j_day_no < days:
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jm = i
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break
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j_day_no -= days
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else:
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jm = 11
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jd = j_day_no + 1
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return jy, jm + 1, jd
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def format_jalali(date) -> str:
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jy, jm, jd = gregorian_to_jalali(date)
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text = f"{jd} {_PERSIAN_MONTHS[jm - 1]} {jy}"
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return text.translate(_PERSIAN_DIGITS)
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