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annotate mod_protect_last_admin/mod_protect_last_admin.lua @ 6513:5fb466693e85

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mod_storage_xmlarchive: Ensure list index files are removed using os.remove() on the list files leaves the new index files behind since util.datamanager does not know they are removed. Thanks Link Mauve
author Kim Alvefur <zash@zash.se>
date Tue, 07 Apr 2026 21:10:54 +0200
parents d1f64ffca879
children
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1 module:set_global();
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2
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3 local um = require "prosody.core.usermanager";
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4
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5 local set = require "prosody.util.set";
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6
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7 local protected_roles = module:get_option_set("protect_last_admin_roles", { "prosody:admin", "prosody:operator" });
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8
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9 local errors = require "prosody.util.error".init(module.name, {
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10 ["cannot-remove-only-admin"] = {
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11 code = 400;
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12 type = "cancel";
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13 condition = "service-unavailable";
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14 text = "Cannot remove the only administrator";
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15 extra = {
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16 namespace = "https://prosody.im/protocol/errors";
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17 condition = "cannot-remove-only-admin";
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18 };
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19 };
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20 });
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21
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22 local function other_protected_users(username, host)
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23 local protected_users = set.new();
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24 for protected_role in protected_roles do
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25 local users = um.get_users_with_role(protected_role, host);
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26 module:log("debug", "Role %s: %q", protected_role, users);
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27 protected_users:add_list(um.get_users_with_role(protected_role, host));
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28 end
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29 protected_users:remove(username);
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30 return not protected_users:empty();
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31 end
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32
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33 function check_last_admin(event)
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34 local username, host = event.username, event.host;
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35
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36 local current_role = um.get_user_role(username, host);
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37 if not current_role then
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38 module:log("warn", "Couldn't detect role for %s@%s", username, host);
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39 return;
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40 end
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41
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42 module:log("debug", "Checking whether to allow this event...");
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43
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44 if event.role_name and protected_roles:contains(event.role_name) then
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45 module:log("debug", "Permitting role change to %s", event.role_name);
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46 return; -- Switching to another protected role is fine
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47 end
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48
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49 if not protected_roles:contains(current_role.name) then
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50 module:log("debug", "Permitting event, role %s is not protected", current_role.name);
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51 return; -- This is not a protected user
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52 end
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53
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54 if not other_protected_users(username, host) then
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55 event.reason = errors.new("cannot-remove-only-admin");
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56 return false;
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57 end
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58 module:log("debug", "Permitting event, no reason not to!");
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59 end
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60
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61 module:hook("pre-delete-user", check_last_admin);
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62 module:hook("pre-disable-user", check_last_admin);
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63 module:hook("pre-user-role-change", check_last_admin);