59 lines
1.7 KiB
Lua
59 lines
1.7 KiB
Lua
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---@class oxstring : stringlib
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lib.string = string
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local string_char = string.char
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local math_random = math.random
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local function getLetter() return string_char(math_random(65, 90)) end
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local function getLowerLetter() return string_char(math_random(97, 122)) end
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local function getInt() return math_random(0, 9) end
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local function getAlphanumeric() return math_random(0, 1) == 1 and getLetter() or getInt() end
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local formatChar = {
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['1'] = getInt,
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['A'] = getLetter,
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['a'] = getLowerLetter,
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['.'] = getAlphanumeric,
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}
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---Creates a random string based on a given pattern.
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---`1` will output a random number from 0-9.
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---`A` will output a random letter from A-Z.
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---`a` will output a random letter from a-z.
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---`.` will output a random letter or number.
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---`^` will output the following character literally.
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---Any other character will output said character.
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---@param pattern string
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---@param length? integer Sets the length of the returned string, either padding it or omitting characters.
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---@return string
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function string.random(pattern, length)
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local len = length or #pattern:gsub('%^', '')
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local arr = table.create(len, 0)
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local size = 0
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local i = 0
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while size < len do
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i += 1
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---@type string | integer
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local char = pattern:sub(i, i)
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if char == '' then
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arr[size + 1] = string.rep(' ', len - size)
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break
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elseif char == '^' then
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i += 1
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char = pattern:sub(i, i)
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else
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local fn = formatChar[char]
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char = fn and fn() or char
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end
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size += 1
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arr[size] = char
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end
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return table.concat(arr)
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end
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return lib.string
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