86 lines
1.9 KiB
Lua
86 lines
1.9 KiB
Lua
local lowers = {}
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local uppers = {}
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for c in ('abcdefghijklmnopqrstuvwxyz'):gmatch '.' do
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lowers[c] = true
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uppers[c:upper()] = true
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end
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---@param input string
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---@param other string
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local function isValidFirstChar(input, other)
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local first = input:sub(1, 1):upper()
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if first == other:sub(1, 1):upper() then
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return true
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end
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local pos = other:find(first, 2, true)
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if not pos and uppers[first] then
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-- word after symbol?
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if other:find('%A' .. first:lower(), 2) then
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return true
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end
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end
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if not pos then
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return false
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end
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local char = other:sub(pos, pos)
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-- symbol?
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if not uppers[char] then
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return true
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end
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-- word boundary?
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local beforeChar = other:sub(pos - 1, pos - 1)
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if not uppers[beforeChar] then
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return true
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end
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return false
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end
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local function isAlmostSame(input, other)
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local lMe = input:lower()
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local lOther = other:lower()
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if lMe == lOther:sub(1, #lMe) then
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return true
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end
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local chars = {}
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for i = 1, #lOther do
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local c = lOther:sub(i, i)
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chars[c] = (chars[c] or 0) + 1
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end
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for i = 1, #lMe do
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local c = lMe:sub(i, i)
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if chars[c] and chars[c] > 0 then
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chars[c] = chars[c] - 1
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else
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return false
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end
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end
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return true
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end
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---@param input string
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---@param other string
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---@param fast? boolean
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---@return boolean isMatch
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---@return number deviation
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return function (input, other, fast)
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if input == other then
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return true, 0
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end
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if input == '' then
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return true, 0
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end
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if #input > #other then
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return false, 0
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end
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if fast and input:sub(1, 1) ~= other:sub(1, 1) then
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return false, 0
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end
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if not isValidFirstChar(input, other) then
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return false, 0
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end
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if not isAlmostSame(input, other) then
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return false, 0
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end
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return true, 1
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end
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