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annotate mod_muc_restrict_media/mod_muc_restrict_media.lua @ 5403:c574aaaa4d57

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mod_http_oauth2: Simplify validation of various URIs Why: diffstat How: Reuse of the redirect_uri_allowed() function
author Kim Alvefur <zash@zash.se>
date Tue, 02 May 2023 16:23:05 +0200
parents 1682166171ff
children
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df2246b15075 mod_muc_restrict_media: Allow hiding inline media from unaffiliated users in MUCs
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1 module:depends"muc";
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2
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3 local restrict_by_default = module:get_option_boolean("muc_room_default_restrict_media", true);
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4
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5 local function should_restrict_media(room)
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6 local restrict_media = room._data.restrict_media;
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7 if restrict_media == nil then
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8 restrict_media = restrict_by_default;
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9 end
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10 return restrict_media;
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11 end
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12
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13 module:hook("muc-config-form", function(event)
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14 local room, form = event.room, event.form;
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15 table.insert(form, {
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16 name = "{xmpp:prosody.im}muc#roomconfig_unaffiliated_media",
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17 type = "boolean",
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18 label = "Display inline media (images, etc.) from non-members",
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19 value = not should_restrict_media(room),
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20 });
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21 end);
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22
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23 module:hook("muc-config-submitted", function(event)
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24 local room, fields, changed = event.room, event.fields, event.changed;
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25 local new_restrict_media = not fields["{xmpp:prosody.im}muc#roomconfig_unaffiliated_media"];
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26 if new_restrict_media ~= should_restrict_media(room) then
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27 if new_restrict_media == restrict_by_default then
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28 room._data.restrict_media = nil;
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29 else
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30 room._data.restrict_media = new_restrict_media;
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31 end
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32 if type(changed) == "table" then
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33 changed["{xmpp:prosody.im}muc#roomconfig_unaffiliated_media"] = true;
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34 else
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35 event.changed = true;
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36 end
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37 end
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38 end);
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39
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40 module:hook("muc-disco#info", function (event)
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41 local room, form, formdata = event.room, event.form, event.formdata;
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42
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43 local allow_unaffiliated_media = not should_restrict_media(room);
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44 table.insert(form, {
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45 name = "{xmpp:prosody.im}muc#roomconfig_unaffiliated_media",
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46 type = "boolean",
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47 });
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48 formdata["{xmpp:prosody.im}muc#roomconfig_unaffiliated_media"] = allow_unaffiliated_media;
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49 end);
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50
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51 local function strip_xhtml_img(tag)
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52 if tag.attr.xmlns == "http://www.w3.org/1999/xhtml" and tag.name == "img" then
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53 tag.name = "i";
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54 tag:text(tag.attr.alt or "<image blocked>");
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55 tag.attr = { xmlns = tag.attr.xmlns, title = tag.attr.title };
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56 tag:maptags(strip_xhtml_img);
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57 else
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58 tag:maptags(strip_xhtml_img);
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59 end
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60
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61 return tag;
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62 end
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63
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64 local function filter_media_tags(tag)
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65 local xmlns = tag.attr.xmlns;
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66 if xmlns == "jabber:x:oob" then
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67 return nil;
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68 elseif xmlns == "urn:xmpp:reference:0" then
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69 if tag:get_child("media-sharing", "urn:xmpp:sims:1") then
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70 return nil;
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71 end
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72 elseif xmlns == "http://jabber.org/protocol/xhtml-im" then
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73 return strip_xhtml_img(tag);
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74 end
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75 return tag;
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76 end
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77
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78 module:hook("muc-occupant-groupchat", function (event)
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79 local stanza = event.stanza;
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80 if stanza.attr.type ~= "groupchat" then return; end
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81 if event.room:get_affiliation(stanza.attr.from) then return end
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82 if should_restrict_media(event.room) then
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83 stanza:maptags(filter_media_tags);
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84 end
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85 end, 20);