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local exports = {}
local lpeg = require 'lpeg'
local split_grammar = {}
exports.rspamd_str_split = function(s, sep)
local gr = split_grammar[sep]
if not gr then
local _sep = lpeg.P(sep)
local elem = lpeg.C((1 - _sep)^0)
local p = lpeg.Ct(elem * (_sep * elem)^0)
gr = p
split_grammar[sep] = gr
end
return gr:match(s)
end
local space = lpeg.S' \t\n\v\f\r'
local nospace = 1 - space
local ptrim = space^0 * lpeg.C((space^0 * nospace^1)^0)
local match = lpeg.match
exports.rspamd_str_trim = function(s)
return match(ptrim, s)
end
-- Robert Jay Gould http://lua-users.org/wiki/SimpleRound
exports.round = function(num, numDecimalPlaces)
local mult = 10^(numDecimalPlaces or 0)
return math.floor(num * mult) / mult
end
exports.template = function(tmpl, keys)
local var_lit = lpeg.P { lpeg.R("az") + lpeg.R("AZ") + lpeg.R("09") + "_" }
local var = lpeg.P { (lpeg.P("$") / "") * ((var_lit^1) / keys) }
local var_braced = lpeg.P { (lpeg.P("${") / "") * ((var_lit^1) / keys) * (lpeg.P("}") / "") }
local template_grammar = lpeg.Cs((var + var_braced + 1)^0)
return lpeg.match(template_grammar, tmpl)
end
exports.remove_email_aliases = function(addr)
local function check_gmail_user(addr)
-- Remove all points
local no_dots_user = string.gsub(addr.user, '.', '')
local cap, pluses = string.match(no_dots_user, '^([^%+][^%+]*)(%+.*)$')
if cap then
return cap, rspamd_str_split(pluses, '+'), nil
elseif no_dots_user ~= addr.user then
return no_dots_user
end
return nil
end
local function check_address(addr)
if addr.user then
local cap, pluses = string.match(addr.user, '^([^%+][^%+]*)(%+.*)$')
if cap then
return cap, rspamd_str_split(pluses, '+'), nil
end
end
return nil
end
local function set_addr(addr, new_user, new_domain)
if new_user then
addr.user = new_user
end
if new_domain then
addr.domain = new_domain
end
if addr.domain then
addr.addr = string.format('%s@%s', addr.user, addr.domain)
else
addr.addr = string.format('%s@', addr.user)
end
if addr.name and #addr.name > 0 then
addr.raw = string.format('"%s" <%s>', addr.name, addr.addr)
else
addr.raw = string.format('<%s>', addr.addr)
end
end
local function check_gmail(addr)
local nu, tags, nd = check_gmail_user(addr)
if nu then
return nu, tags, nd
end
return nil
end
local function check_gmail(addr)
local nd = 'gmail.com'
local nu, tags = check_gmail_user(addr)
if nu then
return nu, tags, nd
end
return nil, nil, nd
end
local specific_domains = {
['gmail.com'] = check_gmail,
['googlemail.com'] = check_googlemail,
}
if addr then
if addr.domain and specific_domains[addr.domain] then
local nu, tags, nd = specific_domains[addr.domain](addr)
if nu or nd then
set_addr(addr, nu, nd)
return nu, tags
end
else
local nu, tags, nd = check_address(addr)
if nu or nd then
set_addr(addr, nu, nd)
return nu, tags
end
end
return nil
end
end
return exports
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