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core/modulemanager.lua @ 1709:51cf905414a2
modulemanager: Removed unused variables and reference to core.discomanager
author | Waqas Hussain <waqas20@gmail.com> |
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date | Tue, 18 Aug 2009 12:55:37 +0500 |
parent | 1708:ac792c01dfcb |
child | 1733:d55ee6c66910 |
rev | line source |
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1523
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Remove version number from copyright headers
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1 -- Prosody IM |
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Update copyright notices for 2009
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2 -- Copyright (C) 2008-2009 Matthew Wild |
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3 -- Copyright (C) 2008-2009 Waqas Hussain |
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Insert copyright/license headers
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4 -- |
758 | 5 -- This project is MIT/X11 licensed. Please see the |
6 -- COPYING file in the source package for more information. | |
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7 -- |
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8 |
467
66f145f5c932
Update Makefile to now pass config paths to prosody. Update prosody, modulemanager and connectionlisteners to obey these paths.
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9 local plugin_dir = CFG_PLUGINDIR or "./plugins/"; |
438
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Bumper commit for the new modulemanager API \o/ Updates all the modules, though some more changes may be in store.
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10 |
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11 local logger = require "util.logger"; |
540
ec03f6968fa8
Added function add_feature to modules API (for adding disco features)
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12 local log = logger.init("modulemanager"); |
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Add hostmanager, and eventmanager
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13 local eventmanager = require "core.eventmanager"; |
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Move module loading to modulemanager
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14 local config = require "core.configmanager"; |
578
5879264e28e2
Changed module manager to use multitable (initial commit)
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15 local multitable_new = require "util.multitable".new; |
698
d8a678e40a0a
Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
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16 local register_actions = require "core.actions".register; |
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modulemanager: require util.stanza
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17 local st = require "util.stanza"; |
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modulemanager: Changed to use util.pluginloader
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18 local pluginloader = require "util.pluginloader"; |
30 | 19 |
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modulemanager: Add get_host_type() API method, and fix up call_module_method to work properly
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20 local hosts = hosts; |
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modulemanager: module:hook now allows global modules to hook events on the prosody.events object
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21 local prosody = prosody; |
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modulemanager: Add get_host_type() API method, and fix up call_module_method to work properly
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22 |
30 | 23 local loadfile, pcall = loadfile, pcall; |
24 local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv; | |
25 local pairs, ipairs = pairs, ipairs; | |
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core.modulemanager: Some refactoring to make upcoming changes a little easier
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26 local t_insert, t_concat = table.insert, table.concat; |
30 | 27 local type = type; |
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Modulemanager: Basic modules can now be unloaded correctly
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28 local next = next; |
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modulemanager: module.unload now gets called when modules are being unloaded
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29 local rawget = rawget; |
1392
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modulemanager: Added simple module:require implementation
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30 local error = error; |
1105
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modulemanager: No need for print()
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31 local tostring = tostring; |
30 | 32 |
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modulemanager: Small code improvement, move autoloaded modules list to the top of the file
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33 local autoload_modules = {"presence", "message", "iq"}; |
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34 |
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35 -- We need this to let modules access the real global namespace |
30 | 36 local _G = _G; |
37 | |
38 module "modulemanager" | |
39 | |
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modulemanager: Expose api table to allow others to extend the module API
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40 api = {}; |
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41 local api = api; -- Module API container |
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42 |
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43 local modulemap = { ["*"] = {} }; |
438
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44 |
591 | 45 local stanza_handlers = multitable_new(); |
30 | 46 local handler_info = {}; |
438
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47 |
30 | 48 local modulehelpers = setmetatable({}, { __index = _G }); |
49 | |
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Modulemanager: Basic modules can now be unloaded correctly
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50 local handler_table = multitable_new(); |
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modulemanager: Per-host event hooks for plugins - solves issue 41
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51 local hooked = multitable_new(); |
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modulemanager: Keep track of event handlers added by module:hook, and remove them on module unload
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52 local hooks = multitable_new(); |
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53 local event_hooks = multitable_new(); |
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54 |
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55 local NULL = {}; |
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56 |
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57 -- Load modules when a host is activated |
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58 function load_modules_for_host(host) |
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59 if config.get(host, "core", "load_global_modules") ~= false then |
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60 -- Load modules from global section |
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61 local modules_enabled = config.get("*", "core", "modules_enabled"); |
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62 local modules_disabled = config.get(host, "core", "modules_disabled"); |
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63 local disabled_set = {}; |
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64 if modules_enabled then |
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65 if modules_disabled then |
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66 for _, module in ipairs(modules_disabled) do |
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67 disabled_set[module] = true; |
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68 end |
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69 end |
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70 for _, module in ipairs(autoload_modules) do |
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71 if not disabled_set[module] then |
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72 load(host, module); |
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73 end |
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74 end |
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75 for _, module in ipairs(modules_enabled) do |
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76 if not disabled_set[module] and not is_loaded(host, module) then |
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77 load(host, module); |
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78 end |
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79 end |
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80 end |
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81 end |
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82 |
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83 -- Load modules from just this host |
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84 local modules_enabled = config.get(host, "core", "modules_enabled"); |
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85 if modules_enabled and modules_enabled ~= config.get("*", "core", "modules_enabled") then |
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86 for _, module in pairs(modules_enabled) do |
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87 if not is_loaded(host, module) then |
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88 load(host, module); |
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89 end |
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90 end |
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91 end |
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92 end |
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93 eventmanager.add_event_hook("host-activated", load_modules_for_host); |
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94 -- |
30 | 95 |
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96 function load(host, module_name, config) |
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97 if not (host and module_name) then |
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98 return nil, "insufficient-parameters"; |
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99 end |
30 | 100 |
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101 if not modulemap[host] then |
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102 modulemap[host] = {}; |
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103 end |
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104 |
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105 if modulemap[host][module_name] then |
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106 log("warn", "%s is already loaded for %s, so not loading again", module_name, host); |
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107 return nil, "module-already-loaded"; |
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108 elseif modulemap["*"][module_name] then |
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109 return nil, "global-module-already-loaded"; |
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110 end |
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111 |
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112 |
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113 local mod, err = pluginloader.load_code(module_name); |
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114 if not mod then |
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115 log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil"); |
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116 return nil, err; |
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117 end |
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118 |
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119 local _log = logger.init(host..":"..module_name); |
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120 local api_instance = setmetatable({ name = module_name, host = host, config = config, _log = _log, log = function (self, ...) return _log(...); end }, { __index = api }); |
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121 |
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122 local pluginenv = setmetatable({ module = api_instance }, { __index = _G }); |
30 | 123 |
124 setfenv(mod, pluginenv); | |
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125 if not hosts[host] then hosts[host] = { type = "component", host = host, connected = false, s2sout = {} }; end |
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126 |
30 | 127 local success, ret = pcall(mod); |
128 if not success then | |
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129 log("error", "Error initialising module '%s': %s", module_name or "nil", ret or "nil"); |
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130 return nil, ret; |
30 | 131 end |
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132 |
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133 if module_has_method(pluginenv, "load") then |
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134 local ok, err = call_module_method(pluginenv, "load"); |
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135 if (not ok) and err then |
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136 log("warn", "Error loading module '%s' on '%s': %s", module_name, host, err); |
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137 end |
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138 end |
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139 |
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140 -- Use modified host, if the module set one |
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141 modulemap[api_instance.host][module_name] = pluginenv; |
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142 |
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143 if api_instance.host == "*" and host ~= "*" then |
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144 api_instance:set_global(); |
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145 end |
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146 |
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147 return true; |
30 | 148 end |
149 | |
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150 function get_module(host, name) |
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151 return modulemap[host] and modulemap[host][name]; |
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152 end |
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153 |
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154 function is_loaded(host, name) |
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155 return modulemap[host] and modulemap[host][name] and true; |
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156 end |
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157 |
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158 function unload(host, name, ...) |
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159 local mod = get_module(host, name); |
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160 if not mod then return nil, "module-not-loaded"; end |
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161 |
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162 if module_has_method(mod, "unload") then |
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163 local ok, err = call_module_method(mod, "unload"); |
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164 if (not ok) and err then |
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165 log("warn", "Non-fatal error unloading module '%s' on '%s': %s", name, host, err); |
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166 end |
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167 end |
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168 modulemap[host][name] = nil; |
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169 local params = handler_table:get(host, name); -- , {module.host, origin_type, tag, xmlns} |
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170 for _, param in pairs(params or NULL) do |
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171 local handlers = stanza_handlers:get(param[1], param[2], param[3], param[4]); |
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172 if handlers then |
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173 handler_info[handlers[1]] = nil; |
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174 stanza_handlers:remove(param[1], param[2], param[3], param[4]); |
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175 end |
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176 end |
686
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177 event_hooks:remove(host, name); |
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178 -- unhook event handlers hooked by module:hook |
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179 for event, handlers in pairs(hooks:get(host, name) or NULL) do |
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180 for handler in pairs(handlers or NULL) do |
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181 (hosts[host] or prosody).events.remove_handler(event, handler); |
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182 end |
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183 end |
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184 hooks:remove(host, name); |
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185 return true; |
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186 end |
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187 |
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188 function reload(host, name, ...) |
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189 local mod = get_module(host, name); |
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190 if not mod then return nil, "module-not-loaded"; end |
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191 |
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192 local _mod, err = pluginloader.load_code(name); -- checking for syntax errors |
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193 if not _mod then |
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194 log("error", "Unable to load module '%s': %s", name or "nil", err or "nil"); |
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195 return nil, err; |
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196 end |
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197 |
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198 local saved; |
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199 |
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200 if module_has_method(mod, "save") then |
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201 local ok, ret, err = call_module_method(mod, "save"); |
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202 if ok then |
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203 saved = ret; |
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204 else |
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205 log("warn", "Error saving module '%s:%s' state: %s", host, module, ret); |
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206 if not config.get(host, "core", "force_module_reload") then |
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207 log("warn", "Aborting reload due to error, set force_module_reload to ignore this"); |
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208 return nil, "save-state-failed"; |
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209 else |
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210 log("warn", "Continuing with reload (using the force)"); |
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211 end |
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212 end |
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213 end |
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214 |
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215 unload(host, name, ...); |
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216 local ok, err = load(host, name, ...); |
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217 if ok then |
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218 mod = get_module(host, name); |
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219 if module_has_method(mod, "restore") then |
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220 local ok, err = call_module_method(mod, "restore", saved or {}) |
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221 if (not ok) and err then |
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222 log("warn", "Error restoring module '%s' from '%s': %s", name, host, err); |
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223 end |
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224 end |
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225 return true; |
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226 end |
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227 return ok, err; |
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228 end |
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229 |
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230 function handle_stanza(host, origin, stanza) |
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231 local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns, origin.type; |
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232 if name == "iq" and xmlns == "jabber:client" then |
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233 if stanza.attr.type == "get" or stanza.attr.type == "set" then |
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234 xmlns = stanza.tags[1].attr.xmlns or "jabber:client"; |
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235 log("debug", "Stanza of type %s from %s has xmlns: %s", name, origin_type, xmlns); |
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236 else |
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237 log("debug", "Discarding %s from %s of type: %s", name, origin_type, stanza.attr.type); |
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238 return true; |
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239 end |
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240 end |
591 | 241 local handlers = stanza_handlers:get(host, origin_type, name, xmlns); |
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242 if not handlers then handlers = stanza_handlers:get("*", origin_type, name, xmlns); end |
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243 if handlers then |
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244 log("debug", "Passing stanza to mod_%s", handler_info[handlers[1]].name); |
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245 (handlers[1])(origin, stanza); |
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246 return true; |
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247 else |
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248 log("debug", "Unhandled %s stanza: %s; xmlns=%s", origin.type, stanza.name, xmlns); -- we didn't handle it |
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249 if stanza.attr.xmlns == "jabber:client" then |
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250 if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then |
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251 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); |
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252 end |
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253 elseif not((name == "features" or name == "error") and xmlns == "http://etherx.jabber.org/streams") then -- FIXME remove check once we handle S2S features |
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254 origin:close("unsupported-stanza-type"); |
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255 end |
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256 end |
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257 end |
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258 |
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259 function module_has_method(module, method) |
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260 return type(module.module[method]) == "function"; |
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261 end |
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262 |
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263 function call_module_method(module, method, ...) |
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264 if module_has_method(module, method) then |
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265 local f = module.module[method]; |
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266 return pcall(f, ...); |
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267 else |
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268 return false, "no-such-method"; |
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269 end |
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270 end |
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271 |
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272 ----- API functions exposed to modules ----------- |
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273 -- Must all be in api.* |
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274 |
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275 -- Returns the name of the current module |
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276 function api:get_name() |
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277 return self.name; |
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278 end |
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279 |
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280 -- Returns the host that the current module is serving |
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281 function api:get_host() |
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282 return self.host; |
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283 end |
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284 |
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285 function api:get_host_type() |
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286 return hosts[self.host].type; |
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287 end |
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288 |
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289 function api:set_global() |
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290 self.host = "*"; |
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291 -- Update the logger |
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292 local _log = logger.init("mod_"..self.name); |
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293 self.log = function (self, ...) return _log(...); end; |
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294 self._log = _log; |
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295 end |
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296 |
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297 local function _add_handler(module, origin_type, tag, xmlns, handler) |
591 | 298 local handlers = stanza_handlers:get(module.host, origin_type, tag, xmlns); |
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299 local msg = (tag == "iq") and "namespace" or "payload namespace"; |
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300 if not handlers then |
591 | 301 stanza_handlers:add(module.host, origin_type, tag, xmlns, handler); |
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302 handler_info[handler] = module; |
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303 handler_table:add(module.host, module.name, {module.host, origin_type, tag, xmlns}); |
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304 --module:log("debug", "I now handle tag '%s' [%s] with %s '%s'", tag, origin_type, msg, xmlns); |
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305 else |
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306 module:log("warn", "I wanted to handle tag '%s' [%s] with %s '%s' but mod_%s already handles that", tag, origin_type, msg, xmlns, handler_info[handlers[1]].module.name); |
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307 end |
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308 end |
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309 |
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310 function api:add_handler(origin_type, tag, xmlns, handler) |
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311 if not (origin_type and tag and xmlns and handler) then return false; end |
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312 if type(origin_type) == "table" then |
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313 for _, origin_type in ipairs(origin_type) do |
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314 _add_handler(self, origin_type, tag, xmlns, handler); |
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315 end |
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316 else |
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317 _add_handler(self, origin_type, tag, xmlns, handler); |
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318 end |
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319 end |
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320 function api:add_iq_handler(origin_type, xmlns, handler) |
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321 self:add_handler(origin_type, "iq", xmlns, handler); |
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322 end |
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323 |
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324 function api:add_feature(xmlns) |
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325 self:add_item("feature", xmlns); |
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326 end |
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327 function api:add_identity(category, type, name) |
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328 self:add_item("identity", {category = category, type = type, name = name}); |
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329 end |
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330 |
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331 local event_hook = function(host, mod_name, event_name, ...) |
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332 if type((...)) == "table" and (...).host and (...).host ~= host then return; end |
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333 for handler in pairs(event_hooks:get(host, mod_name, event_name) or NULL) do |
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334 handler(...); |
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335 end |
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336 end; |
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337 function api:add_event_hook(name, handler) |
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338 if not hooked:get(self.host, self.name, name) then |
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339 eventmanager.add_event_hook(name, function(...) event_hook(self.host, self.name, name, ...); end); |
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340 hooked:set(self.host, self.name, name, true); |
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341 end |
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342 event_hooks:set(self.host, self.name, name, handler, true); |
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343 end |
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344 |
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345 function api:fire_event(...) |
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346 return (hosts[self.host] or prosody).events.fire_event(...); |
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347 end |
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348 |
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349 function api:hook(event, handler, priority) |
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350 hooks:set(self.host, self.name, event, handler, true); |
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351 (hosts[self.host] or prosody).events.add_handler(event, handler, priority); |
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352 end |
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353 |
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354 function api:hook_stanza(xmlns, name, handler, priority) |
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355 if not handler and type(name) == "function" then |
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356 -- If only 2 options then they specified no xmlns |
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357 xmlns, name, handler, priority = nil, xmlns, name, handler; |
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358 elseif not (handler and name) then |
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359 self:log("warn", "Error: Insufficient parameters to module:hook_stanza()"); |
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360 return; |
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361 end |
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362 return api.hook(self, "stanza/"..(xmlns and (xmlns..":") or "")..name, function (data) return handler(data.origin, data.stanza, data); end, priority); |
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363 end |
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364 |
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365 function api:require(lib) |
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366 local f, n = pluginloader.load_code(self.name, lib..".lib.lua"); |
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367 if not f then |
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368 f, n = pluginloader.load_code(lib, lib..".lib.lua"); |
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369 end |
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370 if not f then error("Failed to load plugin library '"..lib.."', error: "..n); end -- FIXME better error message |
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371 setfenv(f, setmetatable({ module = self }, { __index = _G })); |
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372 return f(); |
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373 end |
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374 |
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375 function api:get_option(name, default_value) |
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376 return config.get(self.host, self.name, name) or config.get(self.host, "core", name) or default_value; |
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377 end |
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378 |
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379 local t_remove = _G.table.remove; |
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380 local module_items = multitable_new(); |
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381 function api:add_item(key, value) |
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382 self.items = self.items or {}; |
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383 self.items[key] = self.items[key] or {}; |
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384 t_insert(self.items[key], value); |
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385 self:fire_event("item-added/"..key, {source = self, item = value}); |
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386 end |
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387 function api:remove_item(key, value) |
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388 local t = self.items and self.items[key] or NULL; |
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389 for i = #t,1,-1 do |
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390 if t[i] == value then |
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391 t_remove(self.items[key], i); |
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392 self:fire_event("item-removed/"..key, {source = self, item = value}); |
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393 return value; |
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394 end |
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395 end |
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396 end |
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397 |
1698
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modulemanager: Added module API function to get all items for a given host based on a key
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398 function api:get_host_items(key) |
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399 local result = {}; |
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400 for mod_name, module in pairs(modulemap[self.host]) do |
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401 module = module.module; |
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402 if module.items then |
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403 for _, item in ipairs(module.items[key] or NULL) do |
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404 t_insert(result, item); |
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405 end |
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406 end |
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407 end |
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408 return result; |
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409 end |
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410 |
438
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Bumper commit for the new modulemanager API \o/ Updates all the modules, though some more changes may be in store.
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411 -------------------------------------------------------------------- |
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412 |
698
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Add core.actions for managing server 'actions'; and make modulemanager register actions 'load' and 'unload'
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413 local actions = {}; |
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414 |
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415 function actions.load(params) |
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416 --return true, "Module loaded ("..params.module.." on "..params.host..")"; |
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417 return load(params.host, params.module); |
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418 end |
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419 |
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420 function actions.unload(params) |
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421 return unload(params.host, params.module); |
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422 end |
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423 |
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424 register_actions("/modules", actions); |
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425 |
39
89877d61ac51
Add support for arbitrary events and event hooks
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426 return _M; |