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annotate mod_groups_internal/mod_groups_internal.lua @ 4386:6357ac65b4eb

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mod_groups_internal: allow delay of roster sync on group change This is useful when executing a bulk change (e.g. a creation of a group with many members) to avoid O(n^3).
author Jonas Schäfer <jonas@wielicki.name>
date Mon, 25 Jan 2021 21:33:38 +0100
parents dfb34cc97028
children 7de3c955cfe2
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1 local rostermanager = require"core.rostermanager";
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2 local id = require "util.id";
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3 local jid = require "util.jid";
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4 local jid_join = jid.join;
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5 local host = module.host;
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6
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7 local group_info_store = module:open_store("group_info");
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8 local group_members_store = module:open_store("groups");
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9 local group_memberships = module:open_store("groups", "map");
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10
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11 local is_contact_subscribed = rostermanager.is_contact_subscribed;
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12
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13 -- Make a *one-way* subscription. User will see when contact is online,
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14 -- contact will not see when user is online.
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15 local function subscribe(user, user_jid, contact, contact_jid)
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16 -- Update user's roster to say subscription request is pending...
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17 rostermanager.set_contact_pending_out(user, host, contact_jid);
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18 -- Update contact's roster to say subscription request is pending...
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19 rostermanager.set_contact_pending_in(contact, host, user_jid);
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20 -- Update contact's roster to say subscription request approved...
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21 rostermanager.subscribed(contact, host, user_jid);
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22 -- Update user's roster to say subscription request approved...
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23 rostermanager.process_inbound_subscription_approval(user, host, contact_jid);
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24
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25 -- Push updates to both rosters
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26 rostermanager.roster_push(user, host, contact_jid);
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27 rostermanager.roster_push(contact, host, user_jid);
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28 end
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29
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30 local function user_groups(username)
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31 return pairs(group_memberships:get_all(username) or {});
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32 end
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33
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34 local function do_single_group_subscriptions(username, group_id)
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35 local members = group_members_store:get(group_id);
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36 if not members then return; end
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37 local user_jid = jid_join(username, host);
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38 for membername in pairs(members) do
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39 if membername ~= username then
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40 local member_jid = jid_join(membername, host);
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41 if not is_contact_subscribed(username, host, member_jid) then
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42 module:log("debug", "[group %s] Subscribing %s to %s", member_jid, user_jid);
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43 subscribe(membername, member_jid, username, user_jid);
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44 end
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45 if not is_contact_subscribed(membername, host, user_jid) then
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46 module:log("debug", "[group %s] Subscribing %s to %s", user_jid, member_jid);
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47 subscribe(username, user_jid, membername, member_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 do_all_group_subscriptions_by_user(username)
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54 for group_id in user_groups(username) do
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55 do_single_group_subscriptions(username, group_id);
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56 end
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57 end
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58
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59 local function do_all_group_subscriptions_by_group(group_id)
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60 for membername in pairs(get_members(group_id)) do
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61 do_single_group_subscriptions(membername, group_id);
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62 end
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63 end
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64
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65 module:hook("resource-bind", function(event)
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66 module:log("debug", "Updating group subscriptions...");
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67 do_all_group_subscriptions_by_user(event.session.username);
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68 end);
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69
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70 local function get_group_muc(group_id)
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71 -- Group MUC
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72 local group_info = group_info_store:get(group_id);
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73 if group_info and group_info.muc_jid then
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74 local muc_jid = group_info.muc_jid;
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75 local mod_muc = hosts[jid.host(muc_jid)].modules.muc;
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76 if mod_muc then
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77 local room = mod_muc.get_room_from_jid(muc_jid);
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78 if not room then
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79 room = mod_muc.create_room(muc_jid);
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80 end
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81 return room;
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82 end
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83 end
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84 end
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85
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86 --luacheck: ignore 131
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87 function create(group_info, create_muc, group_id)
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88 if not group_info.name then
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89 return nil, "group-name-required";
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90 end
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91 if group_id then
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92 if exists(group_id) then
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93 return nil, "conflict"
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94 end
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95 else
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96 group_id = id.short();
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97 end
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98
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99 if create_muc then
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100 return nil, "not-implemented";
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101 end
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102
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103 local ok = group_info_store:set(group_id, {
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104 name = group_info.name;
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105 });
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106 if not ok then
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107 return nil, "internal-server-error";
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108 end
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109 return group_id;
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110 end
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111
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112 function get_info(group_id)
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113 return group_info_store:get(group_id);
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114 end
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115
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116 function set_info(group_id, info)
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117 if not info then
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118 return nil, "bad-request"
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119 end
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120
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121 if not info.name or #info.name == 0 then
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122 return nil, "bad-request"
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123 end
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124
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125 local ok = group_info_store:set(group_id, info);
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126 if not ok then
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127 return nil, "internal-server-error";
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128 end
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129 return true
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130 end
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131
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132 function get_members(group_id)
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133 return group_members_store:get(group_id);
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134 end
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135
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136 function exists(group_id)
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137 return not not get_info(group_id);
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138 end
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139
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140 function get_user_groups(username)
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141 local groups = {};
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142 do
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143 local group_set = group_memberships:get_all(username);
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144 if group_set then
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145 for group_id in pairs(group_set) do
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146 table.insert(groups, group_id);
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147 end
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148 end
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149 end
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150 return groups;
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151 end
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152
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153 function delete(group_id)
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154 if group_members_store:set(group_id, nil) then
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155 return group_info_store:set(group_id, nil);
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156 end
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157 return nil, "internal-server-error";
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158 end
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159
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160 function add_member(group_id, username, delay_update)
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161 local group_info = group_info_store:get(group_id);
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162 if not group_info then
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163 return nil, "group-not-found";
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164 end
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165 if not group_memberships:set(group_id, username, {}) then
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166 return nil, "internal-server-error";
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167 end
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168 if not delay_update then
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169 do_all_group_subscriptions_by_group(group_id);
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170 end
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171 return true;
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172 end
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173
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174 function remove_member(group_id, username)
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175 local group_info = group_info_store:get(group_id);
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176 if not group_info then
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177 return nil, "group-not-found";
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178 end
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179 if not group_memberships:set(group_id, username, nil) then
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180 return nil, "internal-server-error";
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181 end
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182 return true;
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183 end
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184
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185 function sync(group_id)
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186 do_all_group_subscriptions_by_group(group_id)
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187 end
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188
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189 -- Returns iterator over group ids
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190 function groups()
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191 return group_info_store:users();
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192 end