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Editing: base.lua

-- encoding: UTF-8

_CHINESE_DIGITS = {
  [0] = "〇",
  [1] = "一",
  [2] = "二",
  [3] = "三",
  [4] = "四",
  [5] = "五",
  [6] = "六",
  [7] = "七",
  [8] = "八",
  [9] = "九",
  [10] = "十",
}
_DATE_PATTERN = "^(%d+)-(%d+)-(%d+)$"
_TIME_PATTERN = "^(%d+):(%d+)$"

function get_chinese_math_num(num)
  local ret
  if num < 10 then
    ret = _CHINESE_DIGITS[num]
  elseif num < 20 then
    ret = _CHINESE_DIGITS[10]
    if num > 10 then
      ret = ret .. _CHINESE_DIGITS[num % 10]
    end
  elseif num < 100 then
    local mod = num % 10
    ret = _CHINESE_DIGITS[(num - mod) / 10] .. _CHINESE_DIGITS[10]
    if mod > 0 then
      ret = ret .. _CHINESE_DIGITS[mod]
    end
  else
    error("Invalid number")
  end
  return ret
end

function get_chinese_non_math_num(num)
  local ret = ""
  for ch in tostring(num):gmatch(".") do
    if ch >= "0" and ch <= "9" then
      ch = _CHINESE_DIGITS[tonumber(ch)]
    end
    ret = ret .. ch
  end
  return ret
end

function _verify_time(hour, minute)
  if hour < 0 or hour > 23 or minute < 0 or minute > 59 then
    error("Invalid time")
  end
end

function _verify_date(month, day)
  if month < 1 or month > 12 or day < 1 or day > _MONTH_TABLE_LEAF[month] then
    error("Invalid date")
  end
end

function _verify_date_with_year(year, month, day)
  _verify_date(month, day)
  if year < 1 or year > 9999 then
    error("Invalid year")
  end
  if month == 2 and day == 29 then
    if year % 400 ~= 0 and year % 100 == 0 then
      error("Invalid lunar day")
    end
    if year % 4 ~= 0 then
      error("Invalid lunar day")
    end
  end
end

function get_chinese_date(y, m, d, full)
  if full then
    return get_chinese_non_math_num(y) .. "年" ..
           get_chinese_math_num(m) .. "月" ..
           get_chinese_math_num(d) .. "日"
  else
    return y .. "年" .. m .. "月" .. d .. "日"
  end
end

function get_chinese_time(h, m, full)
  if full then
    local ret = get_chinese_math_num(h) .. "时"
    if m > 0 then
      ret = ret .. get_chinese_math_num(m) .. "分"
    end
    return ret
  else
    return h .. "时" .. m .. "分"
  end
end

function normalize_date(y, m, d)
  return string.format("%d-%02d-%02d", y, m, d)
end

function normalize_time(h, m)
  return string.format("%02d:%02d", h, m)
end

function get_time(input)
  local now = input
  if #input == 0 then
    now = os.date("%H:%M")
  end
  local hour, minute
  now:gsub(_TIME_PATTERN, function(h, m)
    hour = tonumber(h)
    minute = tonumber(m)
  end)
  _verify_time(hour, minute)
  return {
    normalize_time(hour, minute),
    get_chinese_time(hour, minute, false),
    get_chinese_time(hour, minute, true),
  }
end

function get_date(input)
  local now = input
  if #input == 0 then
    now = os.date("%Y-%m-%d")
  end
  local year, month, day
  now:gsub(_DATE_PATTERN, function(y, m, d)
    year = tonumber(y)
    month = tonumber(m)
    day = tonumber(d)
  end)
  _verify_date_with_year(year, month, day)
  return {
    normalize_date(year, month, day),
    get_chinese_date(year, month, day, false),
    get_chinese_date(year, month, day, true),
  }
end

----------------------------------

_MATH_KEYWORDS = {
  "abs", "acos", "asin", "atan", "atan2", "ceil", "cos", "cosh", "deg", "exp",
  "floor", "fmod", "frexp", "ldexp", "log", "log10", "max", "min", "modf", "pi",
  "pow", "rad", "random", "randomseed", "sin", "sinh", "sqrt", "tan", "tanh",
}

function _add_math_keyword(input)
  local ret = input
  for _, keyword in pairs(_MATH_KEYWORDS) do
    ret = ret:gsub(string.format("([^%%a\.])(%s$.-$)", keyword), "%1math\.%2")
    ret = ret:gsub(string.format("^(%s$.-$)", keyword), "math\.%1")
  end
  return ret
end

function compute(input)
  local expr = "return " .. _add_math_keyword(input)
  local func = loadstring(expr)
  if func == nil then
    return "-- 未完整表达式 --"
  end
  local ret = func()
  if ret == math.huge then -- div/0
    return "-- 计算错误 --"
  end
  if ret ~= ret then
    -- We rely on the property that NaN is the only value not equal to itself.
    return "-- 计算错误 --"
  end
  return ret
end

--------------------------
_ZODIAC_TABLE = {
  [{3, 21, 4, 19}] = "白羊座(Aries) ♈",
  [{4, 20, 5, 20}] = "金牛座(Taurus) ♉",
  [{5, 21, 6, 21}] = "双子座(Gemini) ♊",
  [{6, 22, 7, 22}] = "巨蟹座(Cancer) ♋",
  [{7, 23, 8, 22}] = "狮子座(Leo) ♌",
  [{8, 23, 9, 23}] = "处女座(Virgo) ♍",
  [{9, 24, 10, 23}] = "天秤座(Libra) ♎",
  [{10, 24, 11, 21}] = "天蝎座(Scorpio) ♏",
  [{11, 22, 12, 21}] = "射手座(Sagittarius) ♐",
  [{12, 22, 12, 31}] = "摩羯座(Capricorn) ♑",
  [{1, 1, 1, 19}] = "摩羯座(Capricorn) ♑",
  [{1, 20, 2, 18}] = "水瓶座(Aquarius) ♒",
  [{2, 19, 3, 20}] = "双鱼座(Pisces) ♓",
}

_MONTH_TABLE_NORMAL = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
_MONTH_TABLE_LEAF = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }

function _compute_month_and_day(month1, day1, month2, day2)
  if month1 < month2 then
    return -1
  elseif month1 > month2 then
    return 1
  elseif day1 < day2 then
    return -1
  elseif day1 > day2 then
    return 1
  else
    return 0
  end
end

-- birthday is a string in MM-DD format.
function query_zodiac(birthday)
  local month = 0
  local day = 0
  birthday:gsub("([0-9]+)-([0-9]+)$",
                function(m, d)
                  month = tonumber(m)
                  day = tonumber(d)
                end
               )
  _verify_date(month, day)
  for range, name in pairs(_ZODIAC_TABLE) do
    local from_month = range[1]
    local from_day = range[2]
    local to_month = range[3]
    local to_day = range[4]
    if _compute_month_and_day(month, day, from_month, from_day) >=0 and
       _compute_month_and_day(month, day, to_month, to_day) <=0 then
      return name
    end
  end
  error("Should never reach here")
end

------------
ime.register_command("sj", "get_time", "输入时间", "alpha", "输入可选时间，例如12:34")
ime.register_command("rq", "get_date", "输入日期", "alpha", "输入可选日期，例如2013-01-01")
ime.register_command("js", "compute", "计算模式", "none", "输入表达式，例如log(2)")
ime.register_command("xz", "query_zodiac", "查询星座", "none", "输入您的生日，例如12-3")

print("lua script loaded.")

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