local array = require"util.array";
local st = require"util.stanza";
local tos_version = assert(module:get_option("tos_version"), "tos_version must be set")
local status_storage;
if prosody.process_type == "prosody" or prosody.shutdown then
status_storage = module:open_store("tos_status", "keyval")
end
local documents = array{};
local function validate_doc(doc)
if not doc.title or not doc.sources or #doc.sources < 1 then
return false, "document needs to have a title and at least one source"
end
for _, source in ipairs(doc.sources) do
if not source.url or not source.type then
return false, "document " .. doc.title .. " has a source without url or type"
end
end
return true, doc
end
for _, doc in ipairs(assert(module:get_option("tos_documents"), "tos_documents option is required")) do
local ok, doc_or_err = validate_doc(doc)
if not ok then
error("invalid TOS document: "..doc_or_err)
end
documents:push(doc);
end
local function send_tos_push(session)
local to = session.username .. "@" .. session.host .. "/" .. session.resource;
local push = st.message({
type = "headline",
to = to,
}, "In order to continue to use the service, you have to accept the current version of the Terms of Service.");
local tos = push:tag("tos-push", { xmlns = "urn:xmpp:tos:0" }):tag("tos", { version = tos_version });
for _, doc in ipairs(documents) do
local doc_tag = tos:tag("document"):text_tag("title", doc.title);
for _, source in ipairs(doc.sources) do
doc_tag:tag("source", { url = source.url, type = source.type }):up();
end
doc_tag:up();
end
tos:up():up();
module:send(push);
end
local function check_tos(event)
local user = event.origin.username
assert(user)
local tos_status = status_storage:get(user)
if tos_status and tos_status.version and tos_status.version == tos_version then
module:log("debug", "user %s has signed the current tos", user);
return
end
module:log("debug", "user %s has not signed the current tos, sending tos push", user);
send_tos_push(event.origin)
end
local function handle_accept_tos_iq(event)
local user = event.origin.username;
assert(user);
local accept = event.stanza.tags[1];
local version = accept.attr["version"];
module:log("debug", "user %s has accepted ToS version %s", user, version);
if version ~= tos_version then
local reply = st.error_reply(event.stanza, "modify", "not-allowed", "Only the most recent version of the ToS can be accepted");
module:log("debug", "%s is not the most recent version (%s), rejecting", version, tos_version);
event.origin.send(reply);
return true;
end
status_storage:set(user, { version = tos_version });
local reply = st.reply(event.stanza);
event.origin.send(reply);
return true;
end
module:hook("presence/initial", check_tos, -100);
module:hook("iq-set/bare/urn:xmpp:tos:0:accept", handle_accept_tos_iq);