Mercurial > prosody-modules
annotate mod_muc_inject_mentions/mod_muc_inject_mentions.lua @ 4421:94805a7e7b30
mod_invites: rework CLI parsing to support groups
To make this sensible, the code had to move from rather simple
parsing to something which looks more like getopt or your typical
shell script.
author | Jonas Schäfer <jonas@wielicki.name> |
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date | Sun, 31 Jan 2021 19:16:36 +0100 |
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) |