-- Stolen from: https://rosettacode.org/wiki/Strip_control_codes_and_extended_characters_from_a_string
function normalizeString(str)

    local s = ""
    for i = 1, str:len() do
        if str:byte(i) >= 32 and str:byte(i) <= 126 then
            s = s .. str:sub(i, i)
        end
    end
    return s

end

exports('normalizeString', normalizeString)

-- Stolen from: https://forums.coronalabs.com/topic/43048-remove-special-characters-from-string/
function urlencode(str)
    if (str) then
        str = string.gsub(str, "\n", "\r\n")
        str = string.gsub(str, "([^%w ])",
                function()
                    return string.format("%%%02X", string.byte)
                end)
        str = string.gsub(str, " ", "+")
    end
    return str
end

exports('urlencode', urlencode)

function round(num, numDecimalPlaces)
    local mult = 10 ^ (numDecimalPlaces or 0)
    return math.floor(num * mult + 0.5) / mult
end

exports('round', round)

--- @param table table
--- @return boolean
function isTable(table)
    if table ~= nil then
        if type(table) == "table" then
            return true
        end
        return false
    else
        return false
    end
end

exports('isTable', isTable)

--- @param func function
--- @return boolean
function isFunction(func)
    if table ~= nil then
        if type(func) == "function" then
            return true
        end
        return false
    else
        return false
    end
end

exports('isFunction', isFunction)

function getKeys()
    return Keys
end

exports('getKeys', getKeys)

--- @param table table
--- @return number
function tableLength(tb)
    local count = 0
    if isTable(tb) then
        for _ in pairs(tb) do
            count = count + 1
        end
        return count
    end
    return nil
end

exports('tableLength', tableLength)

--- @param table table
--- @return number
function tableLastIterator(table)
    local last = 0
    for i, v in pairs(table) do
        last = i
    end
    return last
end

exports('tableLastIterator', tableLastIterator)

function getConfig()
    return Config
end

exports('getConfig', getConfig)

--Taken from ESX
function dumpTable(table, nb)
    if nb == nil then
        nb = 0
    end

    if type(table) == 'table' then
        local s = ''
        for i = 1, nb + 1, 1 do
            s = s .. "    "
        end

        s = '{\n'
        for k, v in pairs(table) do
            if type(k) ~= 'number' then
                k = '"' .. k .. '"'
            end
            for i = 1, nb, 1 do
                s = s .. "    "
            end
            s = s .. '[' .. k .. ' ('.. type(v) .. ')] = ' .. dumpTable(v, nb + 1) .. ',\n'
        end

        for i = 1, nb, 1 do
            s = s .. "    "
        end

        return s .. '}'
    else
        return tostring(table)
    end
end

exports('dumpTable', dumpTable)

function escapeHtml(str)
    str = string.gsub( str, '&', '&amp;' )
    str = string.gsub( str, '<', '&lt;' )
    str = string.gsub( str, '>', '&gt;' )
    str = string.gsub( str, '"', '&quot;' )
    str = string.gsub( str, "'", '&apos;' )
    str = string.gsub( str, "/", '&#47;' )
    return str
end

exports('escapeHtml', escapeHtml)

function triggerName(event)
    return string.format('%s:%s', GetCurrentResourceName(), event)
end