Mercurial > prosody-modules
annotate mod_muc_inject_mentions/mod_muc_inject_mentions.lua @ 5626:a44af1b646f5
mod_http_oauth2: Optionally enforce authentication on revocation endpoint
But why do OAuth require this? If a token leaks, why couldn't anyone
revoke it?
author | Kim Alvefur <zash@zash.se> |
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date | Mon, 31 Jul 2023 02:07:58 +0200 |
parents | 33a41503b9e3 |
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1 module:depends("muc"); |
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2 |
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3 local jid_resource = require "util.jid".resource; |
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4 local st = require "util.stanza"; |
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5 |
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6 local prefixes = module:get_option_set("muc_inject_mentions_prefixes", {}) |
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7 local suffixes = module:get_option_set("muc_inject_mentions_suffixes", {}) |
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8 local enabled_rooms = module:get_option("muc_inject_mentions_enabled_rooms", nil) |
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9 local disabled_rooms = module:get_option("muc_inject_mentions_disabled_rooms", nil) |
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10 local mention_delimiters = module:get_option_set("muc_inject_mentions_mention_delimiters", {" ", "", "\n", "\t"}) |
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11 local append_mentions = module:get_option("muc_inject_mentions_append_mentions", false) |
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12 local strip_out_prefixes = module:get_option("muc_inject_mentions_strip_out_prefixes", false) |
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13 local reserved_nicks = module:get_option("muc_inject_mentions_reserved_nicks", false) |
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14 local use_bare_jid = module:get_option("muc_inject_mentions_use_bare_jid", true) |
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15 local prefix_mandatory = module:get_option("muc_inject_mentions_prefix_mandatory", false) |
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16 local reserved_nicknames = {} |
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17 |
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18 local reference_xmlns = "urn:xmpp:reference:0" |
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19 |
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20 local function update_reserved_nicknames(event) |
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21 local room, data, jid = event.room.jid, event.data, event.jid |
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22 load_room_reserved_nicknames(event.room) |
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23 local nickname = (data or {})["reserved_nickname"] |
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24 |
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25 if nickname then |
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26 reserved_nicknames[room][nickname] = jid |
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27 else |
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28 local nickname_to_remove |
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29 for _nickname, _jid in pairs(reserved_nicknames[room]) do |
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30 if _jid == jid then |
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31 nickname_to_remove = _nickname |
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32 break |
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33 end |
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34 end |
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35 if nickname_to_remove then |
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36 reserved_nicknames[room][nickname_to_remove] = nil |
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37 end |
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38 end |
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39 end |
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40 |
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41 function load_room_reserved_nicknames(room) |
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42 if not reserved_nicknames[room.jid] then |
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43 reserved_nicknames[room.jid] = {} |
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44 for jid, data in pairs(room._affiliations_data or {}) do |
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45 local reserved_nickname = data["reserved_nickname"] |
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46 if reserved_nicknames then |
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47 reserved_nicknames[room.jid][reserved_nickname] = jid |
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48 end |
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49 end |
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50 end |
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51 end |
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52 |
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53 local function get_jid(room, nickname) |
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54 local bare_jid = reserved_nicknames[room.jid][nickname] |
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55 if bare_jid and use_bare_jid then |
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56 return bare_jid |
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57 end |
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58 |
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59 if bare_jid and not use_bare_jid then |
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60 return room.jid .. "/" .. nickname |
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61 end |
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62 end |
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63 |
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64 local function get_participants(room) |
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65 if not reserved_nicks then |
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66 local occupants = room._occupants |
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67 local key, occupant = next(occupants) |
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68 return function () |
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69 while occupant do -- luacheck: ignore |
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70 local nick = jid_resource(occupant.nick); |
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71 local bare_jid = occupant.bare_jid |
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72 key, occupant = next(occupants, key) |
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73 return bare_jid, nick |
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74 end |
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75 end |
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76 else |
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77 local generator = room:each_affiliation() |
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78 local jid, _, affiliation_data = generator(nil, nil) |
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79 return function () |
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80 while jid do |
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81 local bare_jid, nick = jid, (affiliation_data or {})["reserved_nickname"] |
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82 jid, _, affiliation_data = generator(nil, bare_jid) |
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83 if nick then |
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84 return bare_jid, nick |
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85 end |
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86 end |
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87 end |
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88 end |
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89 end |
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90 |
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91 local function add_mention(mentions, bare_jid, first, last, prefix_indices, has_prefix) |
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92 if strip_out_prefixes then |
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93 if has_prefix then |
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94 table.insert(prefix_indices, first-1) |
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95 end |
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96 first = first - #prefix_indices |
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97 last = last - #prefix_indices |
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98 end |
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99 mentions[first] = {bare_jid=bare_jid, first=first, last=last} |
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100 end |
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101 |
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102 local function get_client_mentions(stanza) |
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103 local has_mentions = false |
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104 local client_mentions = {} |
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105 |
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106 for element in stanza:childtags("reference", reference_xmlns) do |
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107 if element.attr.type == "mention" then |
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108 local key = tonumber(element.attr.begin) + 1 -- count starts at 0 |
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109 client_mentions[key] = {bare_jid=element.attr.uri, first=element.attr.begin, last=element.attr["end"]} |
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110 has_mentions = true |
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111 end |
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112 end |
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113 |
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114 return has_mentions, client_mentions |
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115 end |
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116 |
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117 local function is_room_eligible(jid) |
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118 if not enabled_rooms and not disabled_rooms then return true; end |
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119 |
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120 if enabled_rooms then |
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121 for _, _jid in ipairs(enabled_rooms) do |
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122 if _jid == jid then |
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123 return true |
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124 end |
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125 end |
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126 return false |
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127 end |
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128 |
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129 if disabled_rooms then |
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130 for _, _jid in ipairs(disabled_rooms) do |
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131 if _jid == jid then |
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132 return false |
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133 end |
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134 end |
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135 return true |
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136 end |
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137 end |
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138 |
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139 local function has_nick_prefix(body, first) |
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140 -- There are no configured prefixes |
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141 if not prefixes or #prefixes < 1 then return false end |
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142 |
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143 -- Prefix must have a space before it, |
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144 -- be the first character of the body |
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145 -- or be the first character after a new line |
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146 if not mention_delimiters:contains(body:sub(first - 2, first - 2)) then |
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147 return false |
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148 end |
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149 |
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150 local prefix = body:sub(first - 1, first - 1) |
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151 for _, _prefix in ipairs(prefixes) do |
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152 if prefix == _prefix then |
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153 return true |
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154 end |
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155 end |
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|
156 |
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157 return false |
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158 end |
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159 |
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160 local function has_nick_suffix(body, last) |
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161 -- There are no configured suffixes |
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162 if not suffixes or #suffixes < 1 then return false end |
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163 |
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164 -- Suffix must have a space after it, |
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165 -- be the last character of the body |
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166 -- or be the last character before a new line |
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167 if not mention_delimiters:contains(body:sub(last + 2, last + 2)) then |
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168 return false |
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169 end |
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|
170 |
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171 local suffix = body:sub(last+1, last+1) |
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|
172 for _, _suffix in ipairs(suffixes) do |
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173 if suffix == _suffix then |
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174 return true |
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175 end |
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176 end |
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|
177 |
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178 return false |
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179 end |
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180 |
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181 local function search_mentions(room, body, client_mentions) |
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182 load_room_reserved_nicknames(room) |
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183 local mentions, prefix_indices = {}, {} |
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184 local current_word = "" |
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185 local current_word_start |
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186 for i = 1, #body+1 do |
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187 local char = body:sub(i,i) |
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188 -- Mention delimiter found, current_word is completed now |
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189 if mention_delimiters:contains(char) and current_word_start then |
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190 -- Check for nickname without prefix |
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191 local jid = get_jid(room, current_word) |
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192 if jid then |
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193 if not prefix_mandatory then |
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194 add_mention(mentions, jid, current_word_start, i - 1, prefix_indices, false) |
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195 end |
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196 else |
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197 -- Check for nickname with affixes |
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198 local prefix = prefixes:contains(current_word:sub(1,1)) |
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199 local suffix = suffixes:contains(current_word:sub(-1)) |
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200 if prefix and suffix then |
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201 jid = get_jid(room, current_word:sub(2, -2)) |
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202 if jid then |
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203 add_mention(mentions, jid, current_word_start + 1, i - 2, prefix_indices, true) |
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204 end |
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205 elseif prefix then |
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206 jid = get_jid(room, current_word:sub(2)) |
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207 if jid then |
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208 add_mention(mentions, jid, current_word_start + 1, i - 1, prefix_indices, true) |
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209 end |
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210 elseif suffix and not prefix_mandatory then |
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211 jid = get_jid(room, current_word:sub(1, -2)) |
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212 if jid then |
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213 add_mention(mentions, jid, current_word_start, i - 2, prefix_indices, false) |
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214 end |
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215 end |
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216 end |
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217 |
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218 current_word = "" |
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219 current_word_start = nil |
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220 elseif not mention_delimiters:contains(char) then |
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221 current_word_start = current_word_start or i |
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222 current_word = current_word .. char |
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223 end |
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224 end |
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225 |
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226 return mentions, prefix_indices |
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227 end |
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228 |
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229 local function muc_inject_mentions(event) |
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230 local room, stanza = event.room, event.stanza; |
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231 local body = stanza:get_child_text("body") |
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232 |
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233 if not body or #body < 1 then return; end |
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234 |
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235 -- Inject mentions only if the room is configured for them |
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236 if not is_room_eligible(room.jid) then return; end |
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237 |
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238 -- Only act on messages that do not include mentions |
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239 -- unless configuration states otherwise. |
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240 local has_mentions, client_mentions = get_client_mentions(stanza) |
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241 if has_mentions and not append_mentions then return; end |
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242 |
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243 local mentions, prefix_indices = search_mentions(room, body, client_mentions) |
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244 for _, mention in pairs(mentions) do |
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245 -- https://xmpp.org/extensions/xep-0372.html#usecase_mention |
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246 stanza:tag( |
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247 "reference", { |
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248 xmlns=reference_xmlns, |
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249 begin=tostring(mention.first - 1), -- count starts at 0 |
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250 ["end"]=tostring(mention.last), |
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251 type="mention", |
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252 uri="xmpp:" .. mention.bare_jid, |
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253 } |
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254 ):up() |
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255 end |
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256 |
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257 if strip_out_prefixes then |
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258 local body_without_prefixes = "" |
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259 local from = 0 |
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260 if #prefix_indices > 0 then |
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261 for _, prefix_index in ipairs(prefix_indices) do |
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262 body_without_prefixes = body_without_prefixes .. body:sub(from, prefix_index-1) |
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263 from = prefix_index + 1 |
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264 end |
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265 body_without_prefixes = body_without_prefixes .. body:sub(from, #body) |
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266 |
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267 -- Replace original body containing prefixes |
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268 stanza:maptags( |
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269 function(tag) |
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270 if tag.name ~= "body" then |
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271 return tag |
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272 end |
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273 return st.stanza("body"):text(body_without_prefixes) |
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274 end |
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275 ) |
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276 end |
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277 end |
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278 end |
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279 |
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280 module:hook("muc-occupant-groupchat", muc_inject_mentions) |
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281 module:hook("muc-set-affiliation", update_reserved_nicknames) |