prosody-modules
d86592775a20
mod_pep_vcard_png_avatar/mod_pep_vcard_png_avatar.lua

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mod_pep_vcard_png_avatar/mod_pep_vcard_png_avatar.lua @ 4406:d86592775a20

mod_groups_internal: Fix unintended global variable (thanks luacheck)
author Matthew Wild <mwild1@gmail.com>
date Wed, 27 Jan 2021 15:13:18 +0000
parent 3222:c22b6283d226
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2014 Matthew Wild
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3 -- Copyright (C) 2008-2014 Waqas Hussain
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4 -- Copyright (C) 2014 Kim Alvefur
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5 --
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6 -- This project is MIT/X11 licensed. Please see the
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7 -- COPYING file in the source package for more information.
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8 --
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9
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10 local st = require "util.stanza"
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11 local jid = require "util.jid";
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12 local base64 = require"util.encodings".base64;
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13 local sha1 = require"util.hashes".sha1;
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14
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15 local mm = require "core.modulemanager";
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17 -- COMPAT w/trunk
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18 local pep_module_name = "pep";
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19 if mm.get_modules_for_host then
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20 if mm.get_modules_for_host(module.host):contains("pep_simple") then
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21 pep_module_name = "pep_simple";
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22 end
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23 end
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25 local mod_pep = module:depends(pep_module_name);
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26 local pep_data = mod_pep.module.save().data;
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28 if not pep_data then
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29 module:log("error", "This module is not compatible with your version of mod_pep");
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30 if mm.get_modules_for_host then
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31 module:log("error", "Please use mod_pep_simple instead of mod_pep to continue using this module");
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32 end
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33 return false;
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34 end
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35
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36 module:add_feature("http://prosody.im/protocol/vcard-pep-integration");
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37 module:depends"vcard";
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38 local vcard_storage = module:open_store("vcard");
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39
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40 local function get_vcard(username)
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41 local vcard, err = vcard_storage:get(username);
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42 if vcard then
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43 vcard = st.deserialize(vcard);
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44 end
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45 if not vcard then
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46 vcard = st.stanza("vCard", { xmlns = "vcard-temp" });
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47 end
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48 return vcard, err;
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49 end
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50
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51 local function replace_tag(s, replacement)
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52 local once = false;
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53 s:maptags(function (tag)
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54 if tag.name == replacement.name and tag.attr.xmlns == replacement.attr.xmlns then
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55 if not once then
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56 once = true;
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57 return replacement;
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58 else
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59 return nil;
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60 end
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61 end
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62 return tag;
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63 end);
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64 if not once then
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65 s:add_child(replacement);
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66 end
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67 end
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68
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69 local function set_vcard(username, vcard)
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70 if vcard then
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71 vcard = st.preserialize(st.clone(vcard));
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72 end
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73 return vcard_storage:set(username, vcard);
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74 end
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75
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76 local function publish(session, node, id, item)
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77 return module:fire_event("pep-publish-item", {
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78 actor = true, user = jid.bare(session.full_jid), session = session, node = node, id = id, item = item;
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79 });
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80 end
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81
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82 -- vCard -> PEP
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83 local function update_pep(session, vcard)
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84 if not vcard then return end
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85 local nickname = vcard:get_child_text("NICKNAME");
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86 if nickname then
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87 publish(session, "http://jabber.org/protocol/nick", "current", st.stanza("item", {id="current"})
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88 :tag("nick", { xmlns="http://jabber.org/protocol/nick" }):text(nickname));
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89 end
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90
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91 local photo = vcard:get_child("PHOTO");
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92 if photo then
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93 local photo_type = photo:get_child_text("TYPE");
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94 local photo_b64 = photo:get_child_text("BINVAL");
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95 local photo_raw = photo_b64 and base64.decode(photo_b64);
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96 if photo_raw and photo_type then -- Else invalid data or encoding
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97 local photo_hash = sha1(photo_raw, true);
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98
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99 publish(session, "urn:xmpp:avatar:data", photo_hash, st.stanza("item", {id=photo_hash})
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100 :tag("data", { xmlns="urn:xmpp:avatar:data" }):text(photo_b64));
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101 publish(session, "urn:xmpp:avatar:metadata", photo_hash, st.stanza("item", {id=photo_hash})
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102 :tag("metadata", { xmlns="urn:xmpp:avatar:metadata" })
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103 :tag("info", { id = photo_hash, bytes = tostring(#photo_raw), type = photo_type,}));
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104 end
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105 end
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106 end
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107
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108 local function handle_vcard(event)
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109 local session, stanza = event.origin, event.stanza;
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110 if not stanza.attr.to and stanza.attr.type == "set" then
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111 return update_pep(session, stanza:get_child("vCard", "vcard-temp"));
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112 end
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113 end
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114
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115 module:hook("iq/bare/vcard-temp:vCard", handle_vcard, 1);
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116
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117 -- PEP Avatar -> vCard
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118 local function on_publish_metadata(event)
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119 local username = event.session.username;
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120 local metadata = event.item:find("{urn:xmpp:avatar:metadata}metadata/info");
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121 if not metadata then
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122 module:log("error", "No info found");
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123 module:log("debug", event.item:top_tag());
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124 return;
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125 end
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126 module:log("debug", metadata:top_tag());
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127 local user_data = pep_data[username.."@"..module.host];
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128 local pep_photo = user_data["urn:xmpp:avatar:data"];
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129 pep_photo = pep_photo and pep_photo[1] == metadata.attr.id and pep_photo[2];
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130 if not pep_photo then
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131 module:log("error", "No photo found");
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132 return;
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133 end -- Publishing in the wrong order?
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134 local image=pep_photo:get_child_text("data", "urn:xmpp:avatar:data");
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135 if pep_photo and metadata.attr.type == "image/webp" then
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136 local file_webp = io.open("/tmp/Prosody_temp_avatar.webp", "w");
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137 file_webp:write(base64.decode(pep_photo:get_child_text("data", "urn:xmpp:avatar:data")));
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138 file_webp:close();
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139 os.execute("dwebp /tmp/Prosody_temp_avatar.webp -o /tmp/Prosody_temp_avatar.png");
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140 local file_png = io.open("/tmp/Prosody_temp_avatar.png", "r");
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141 if file_png ~= nil then
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142 image=base64.encode(file_png:read("*a"));
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143 file_png:close();
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144 else
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145 module:log("error", "Couldn't access /tmp/Prosody_temp_avatar.png. Are you sure that /tmp is readable and writable and that Prosody can execute the dwebp command?");
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146 end
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147 os.remove("/tmp/Prosody_temp_avatar.webp");
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148 os.remove("/tmp/Prosody_temp_avatar.png");
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149 end
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150 local vcard = get_vcard(username);
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151 local new_photo = st.stanza("PHOTO", { xmlns = "vcard-temp" })
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152 :tag("TYPE"):text(metadata.attr.type):up()
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153 :tag("BINVAL"):text(image);
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154
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155 replace_tag(vcard, new_photo);
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156 set_vcard(username, vcard);
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157 end
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158
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159 -- PEP Nickname -> vCard
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160 local function on_publish_nick(event)
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161 local username = event.session.username;
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162 local vcard = get_vcard(username);
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163 local new_nick = st.stanza("NICKNAME", { xmlns = "vcard-temp" })
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164 :text(event.item:get_child_text("nick", "http://jabber.org/protocol/nick"));
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165 replace_tag(vcard, new_nick);
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166 set_vcard(username, vcard);
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167 end
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168
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169 local function on_publish(event)
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170 if event.actor == true then return end -- Not from a client
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171 local node = event.node;
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172 if node == "urn:xmpp:avatar:metadata" then
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173 return on_publish_metadata(event);
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174 elseif node == "http://jabber.org/protocol/nick" then
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175 return on_publish_nick(event);
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176 end
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177 end
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178
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179 module:hook("pep-publish-item", on_publish, 1);