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4655
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1 local array = require"util.array";
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2 local st = require"util.stanza";
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3
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4 local tos_version = assert(module:get_option("tos_version"), "tos_version must be set")
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5
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6 local status_storage;
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7 if prosody.process_type == "prosody" or prosody.shutdown then
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8 status_storage = module:open_store("tos_status", "keyval")
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9 end
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10
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11 local documents = array{};
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12
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13 local function validate_doc(doc)
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14 if not doc.title or not doc.sources or #doc.sources < 1 then
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15 return false, "document needs to have a title and at least one source"
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16 end
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17 for _, source in ipairs(doc.sources) do
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18 if not source.url or not source.type then
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19 return false, "document " .. doc.title .. " has a source without url or type"
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20 end
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21 end
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22 return true, doc
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23 end
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24
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25 for _, doc in ipairs(assert(module:get_option("tos_documents"), "tos_documents option is required")) do
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26 local ok, doc_or_err = validate_doc(doc)
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27 if not ok then
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28 error("invalid TOS document: "..doc_or_err)
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29 end
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30 documents:push(doc);
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31 end
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32
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33 local function send_tos_push(session)
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34 local to = session.username .. "@" .. session.host .. "/" .. session.resource;
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35 local push = st.message({
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36 type = "headline",
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37 to = to,
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38 }, "In order to continue to use the service, you have to accept the current version of the Terms of Service.");
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39 local tos = push:tag("tos-push", { xmlns = "urn:xmpp:tos:0" }):tag("tos", { version = tos_version });
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40 for _, doc in ipairs(documents) do
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41 local doc_tag = tos:tag("document"):text_tag("title", doc.title);
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42 for _, source in ipairs(doc.sources) do
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43 doc_tag:tag("source", { url = source.url, type = source.type }):up();
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44 end
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45 doc_tag:up();
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46 end
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47 tos:up():up();
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48 module:send(push);
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49 end
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50
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51 local function check_tos(event)
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52 local user = event.origin.username
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53 assert(user)
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54 local tos_status = status_storage:get(user)
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55 if tos_status and tos_status.version and tos_status.version == tos_version then
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56 module:log("debug", "user %s has signed the current tos", user);
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57 return
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58 end
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59 module:log("debug", "user %s has not signed the current tos, sending tos push", user);
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60 send_tos_push(event.origin)
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61 end
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62
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63 local function handle_accept_tos_iq(event)
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64 local user = event.origin.username;
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65 assert(user);
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66 local accept = event.stanza.tags[1];
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67 local version = accept.attr["version"];
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68 module:log("debug", "user %s has accepted ToS version %s", user, version);
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69 if version ~= tos_version then
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70 local reply = st.error_reply(event.stanza, "modify", "not-allowed", "Only the most recent version of the ToS can be accepted");
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71 module:log("debug", "%s is not the most recent version (%s), rejecting", version, tos_version);
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72 event.origin.send(reply);
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73 return true;
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74 end
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75
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76 status_storage:set(user, { version = tos_version });
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77 local reply = st.reply(event.stanza);
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78 event.origin.send(reply);
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79 return true;
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80 end
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81
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82 module:hook("presence/initial", check_tos, -100);
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83 module:hook("iq-set/bare/urn:xmpp:tos:0:accept", handle_accept_tos_iq);
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