Module:Sandbox/User:Waddie96

local p = {}

-- Mapping of string inputs to boolean values
local STR_BOOL = {
    ["yes"]   = true, ["y"]    = true, ["true"]  = true, ["t"]  = true, ["on"]  = true, ["1"] = true,
    ["no"]    = false, ["n"]   = false, ["false"] = false, ["f"]  = false, ["off"] = false, ["0"] = false
}

-- Converts numeric strings or numbers to boolean
local function num(s)
    local n = tonumber(s)
    if n == nil then return nil end
    return n ~= 0
end

-- Main function
---@param input any Input value to evaluate
---@param default any Default to return if input unrecognized
---@return boolean|any
function p.main(frame)
    local input = frame.args[1]
    local default = frame.args[2]

    -- Convert input to string for consistent lookup
    local s = tostring(input)
    local lower = string.lower(s)

    -- Lookup string in STR_BOOL table
    if STR_BOOL[lower] ~= nil then
        return STR_BOOL[lower]
    end

    -- Try numeric conversion
    local nval = num(s)
    if nval ~= nil then
        return nval
    end

    -- Fallback
    return default
end

return p

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Module:Sandbox/User:Waddie96

Usage