prosody
ac792c01dfcb
core/modulemanager.lua

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core/modulemanager.lua @ 1708:ac792c01dfcb

modulemanager: Removed unnecessary code in the unload function
author Waqas Hussain <waqas20@gmail.com>
date Tue, 18 Aug 2009 12:54:16 +0500
parent 1707:c55aa091f42a
child 1709:51cf905414a2
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1 -- Prosody IM
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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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4 --
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b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9
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10
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11 local plugin_dir = CFG_PLUGINDIR or "./plugins/";
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12
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13 local logger = require "util.logger";
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14 local log = logger.init("modulemanager");
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15 local addDiscoInfoHandler = require "core.discomanager".addDiscoInfoHandler;
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16 local eventmanager = require "core.eventmanager";
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17 local config = require "core.configmanager";
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18 local multitable_new = require "util.multitable".new;
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19 local register_actions = require "core.actions".register;
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20 local st = require "util.stanza";
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21 local pluginloader = require "util.pluginloader";
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22
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23 local hosts = hosts;
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24 local prosody = prosody;
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25
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26 local loadfile, pcall = loadfile, pcall;
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27 local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv;
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28 local pairs, ipairs = pairs, ipairs;
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29 local t_insert, t_concat = table.insert, table.concat;
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30 local type = type;
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31 local next = next;
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32 local rawget = rawget;
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33 local error = error;
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34 local tostring = tostring;
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35
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36 local autoload_modules = {"presence", "message", "iq"};
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38 -- We need this to let modules access the real global namespace
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39 local _G = _G;
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40
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41 module "modulemanager"
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42
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43 api = {};
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44 local api = api; -- Module API container
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45
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46 local modulemap = { ["*"] = {} };
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47
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48 local stanza_handlers = multitable_new();
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49 local handler_info = {};
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51 local modulehelpers = setmetatable({}, { __index = _G });
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52
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53 local features_table = multitable_new();
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54 local identities_table = multitable_new();
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55 local handler_table = multitable_new();
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56 local hooked = multitable_new();
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57 local hooks = multitable_new();
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58 local event_hooks = multitable_new();
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59
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60 local NULL = {};
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61
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62 -- Load modules when a host is activated
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63 function load_modules_for_host(host)
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64 if config.get(host, "core", "load_global_modules") ~= false then
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65 -- Load modules from global section
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66 local modules_enabled = config.get("*", "core", "modules_enabled");
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67 local modules_disabled = config.get(host, "core", "modules_disabled");
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68 local disabled_set = {};
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69 if modules_enabled then
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70 if modules_disabled then
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71 for _, module in ipairs(modules_disabled) do
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72 disabled_set[module] = true;
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73 end
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74 end
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75 for _, module in ipairs(autoload_modules) do
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76 if not disabled_set[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 for _, module in ipairs(modules_enabled) do
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81 if not disabled_set[module] and not is_loaded(host, module) then
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82 load(host, module);
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83 end
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84 end
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85 end
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86 end
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87
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88 -- Load modules from just this host
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89 local modules_enabled = config.get(host, "core", "modules_enabled");
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90 if modules_enabled and modules_enabled ~= config.get("*", "core", "modules_enabled") then
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91 for _, module in pairs(modules_enabled) do
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92 if not is_loaded(host, module) then
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93 load(host, module);
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94 end
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95 end
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96 end
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97 end
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98 eventmanager.add_event_hook("host-activated", load_modules_for_host);
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99 --
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100
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101 function load(host, module_name, config)
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102 if not (host and module_name) then
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103 return nil, "insufficient-parameters";
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104 end
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105
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106 if not modulemap[host] then
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107 modulemap[host] = {};
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108 end
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109
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110 if modulemap[host][module_name] then
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111 log("warn", "%s is already loaded for %s, so not loading again", module_name, host);
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112 return nil, "module-already-loaded";
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113 elseif modulemap["*"][module_name] then
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114 return nil, "global-module-already-loaded";
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115 end
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116
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117
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118 local mod, err = pluginloader.load_code(module_name);
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119 if not mod then
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120 log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil");
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121 return nil, err;
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122 end
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123
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124 local _log = logger.init(host..":"..module_name);
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125 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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126
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127 local pluginenv = setmetatable({ module = api_instance }, { __index = _G });
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128
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129 setfenv(mod, pluginenv);
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130 if not hosts[host] then hosts[host] = { type = "component", host = host, connected = false, s2sout = {} }; end
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131
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132 local success, ret = pcall(mod);
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133 if not success then
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diff changeset
134 log("error", "Error initialising module '%s': %s", module_name or "nil", ret or "nil");
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79bd7a3e906c Typo prevented modulemanager.load() from returning the error if load failed.
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135 return nil, ret;
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136 end
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137
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diff changeset
138 if module_has_method(pluginenv, "load") then
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diff changeset
139 local ok, err = call_module_method(pluginenv, "load");
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140 if (not ok) and err then
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141 log("warn", "Error loading module '%s' on '%s': %s", module_name, host, err);
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142 end
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143 end
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144
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eb0cea29c8d7 Temporary hack for global modules
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145 -- Use modified host, if the module set one
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parents: 637
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146 modulemap[api_instance.host][module_name] = pluginenv;
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147
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034e345c0f8d modulemanager: Update logger when a module becomes global
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diff changeset
148 if api_instance.host == "*" and host ~= "*" then
034e345c0f8d modulemanager: Update logger when a module becomes global
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149 api_instance:set_global();
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150 end
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151
229
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parents: 218
diff changeset
152 return true;
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153 end
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154
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155 function get_module(host, name)
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156 return modulemap[host] and modulemap[host][name];
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157 end
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158
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159 function is_loaded(host, name)
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160 return modulemap[host] and modulemap[host][name] and true;
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161 end
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162
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163 function unload(host, name, ...)
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164 local mod = get_module(host, name);
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165 if not mod then return nil, "module-not-loaded"; end
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166
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167 if module_has_method(mod, "unload") then
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168 local ok, err = call_module_method(mod, "unload");
439
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169 if (not ok) and err then
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170 log("warn", "Non-fatal error unloading module '%s' on '%s': %s", name, host, err);
439
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171 end
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172 end
670
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173 modulemap[host][name] = nil;
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174 local params = handler_table:get(host, name); -- , {module.host, origin_type, tag, xmlns}
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b72d408f5f15 modulemanager: Fixed error on unloading modules with no handlers
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175 for _, param in pairs(params or NULL) do
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176 local handlers = stanza_handlers:get(param[1], param[2], param[3], param[4]);
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177 if handlers then
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178 handler_info[handlers[1]] = nil;
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179 stanza_handlers:remove(param[1], param[2], param[3], param[4]);
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180 end
439
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181 end
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13ed38531f69 modulemanager: Per-host event hooks for plugins - solves issue 41
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parents: 675
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182 event_hooks:remove(host, name);
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183 -- unhook event handlers hooked by module:hook
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184 for event, handlers in pairs(hooks:get(host, name) or NULL) do
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185 for handler in pairs(handlers or NULL) do
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186 (hosts[host] or prosody).events.remove_handler(event, handler);
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187 end
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188 end
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189 hooks:remove(host, name);
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190 return true;
439
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191 end
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192
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193 function reload(host, name, ...)
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194 local mod = get_module(host, name);
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195 if not mod then return nil, "module-not-loaded"; end
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196
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857034905016 modulemanager: Changed to use util.pluginloader
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diff changeset
197 local _mod, err = pluginloader.load_code(name); -- checking for syntax errors
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2afd6d9e21cd modulemanager: Check for syntax errors before reloading a module
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198 if not _mod then
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9132f16666e4 modulemanager: Fix copy/paste error, should be name instead of module_name
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parents: 1378
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199 log("error", "Unable to load module '%s': %s", name or "nil", err or "nil");
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200 return nil, err;
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201 end
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202
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203 local saved;
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204
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diff changeset
205 if module_has_method(mod, "save") then
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diff changeset
206 local ok, ret, err = call_module_method(mod, "save");
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207 if ok then
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208 saved = ret;
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209 else
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diff changeset
210 log("warn", "Error saving module '%s:%s' state: %s", host, module, ret);
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diff changeset
211 if not config.get(host, "core", "force_module_reload") then
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diff changeset
212 log("warn", "Aborting reload due to error, set force_module_reload to ignore this");
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diff changeset
213 return nil, "save-state-failed";
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diff changeset
214 else
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diff changeset
215 log("warn", "Continuing with reload (using the force)");
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216 end
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217 end
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diff changeset
218 end
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diff changeset
219
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diff changeset
220 unload(host, name, ...);
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diff changeset
221 local ok, err = load(host, name, ...);
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diff changeset
222 if ok then
5a343599cd3e core.modulemanager: Some refactoring to make upcoming changes a little easier
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diff changeset
223 mod = get_module(host, name);
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diff changeset
224 if module_has_method(mod, "restore") then
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parents: 733
diff changeset
225 local ok, err = call_module_method(mod, "restore", saved or {})
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diff changeset
226 if (not ok) and err then
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diff changeset
227 log("warn", "Error restoring module '%s' from '%s': %s", name, host, err);
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diff changeset
228 end
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diff changeset
229 end
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parents: 709
diff changeset
230 return true;
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diff changeset
231 end
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diff changeset
232 return ok, err;
710
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233 end
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diff changeset
234
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parents: 573
diff changeset
235 function handle_stanza(host, origin, stanza)
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parents: 573
diff changeset
236 local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns, origin.type;
5879264e28e2 Changed module manager to use multitable (initial commit)
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parents: 573
diff changeset
237 if name == "iq" and xmlns == "jabber:client" then
608
3758af511ce8 Don't try processing stanzas not of type get or set in module manager
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parents: 592
diff changeset
238 if stanza.attr.type == "get" or stanza.attr.type == "set" then
929
b4f2ca7f6f00 Fixed: modulemanager: IQs with extended elements in the default namespace could cause backtraces (related to issue #74)
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
239 xmlns = stanza.tags[1].attr.xmlns or "jabber:client";
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parents: 592
diff changeset
240 log("debug", "Stanza of type %s from %s has xmlns: %s", name, origin_type, xmlns);
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parents: 592
diff changeset
241 else
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parents: 592
diff changeset
242 log("debug", "Discarding %s from %s of type: %s", name, origin_type, stanza.attr.type);
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parents: 592
diff changeset
243 return true;
3758af511ce8 Don't try processing stanzas not of type get or set in module manager
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parents: 592
diff changeset
244 end
578
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parents: 573
diff changeset
245 end
591
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parents: 590
diff changeset
246 local handlers = stanza_handlers:get(host, origin_type, name, xmlns);
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fad020cead52 Allow global modules to hook stanza handlers
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parents: 778
diff changeset
247 if not handlers then handlers = stanza_handlers:get("*", origin_type, name, xmlns); end
578
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parents: 573
diff changeset
248 if handlers then
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parents: 573
diff changeset
249 log("debug", "Passing stanza to mod_%s", handler_info[handlers[1]].name);
5879264e28e2 Changed module manager to use multitable (initial commit)
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parents: 573
diff changeset
250 (handlers[1])(origin, stanza);
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parents: 573
diff changeset
251 return true;
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parents: 573
diff changeset
252 else
1167
5620ea24be94 stanza_router: Removed global function core_handle_stanza
Waqas Hussain <waqas20@gmail.com>
parents: 1105
diff changeset
253 log("debug", "Unhandled %s stanza: %s; xmlns=%s", origin.type, stanza.name, xmlns); -- we didn't handle it
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parents: 1105
diff changeset
254 if stanza.attr.xmlns == "jabber:client" then
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parents: 1105
diff changeset
255 if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
5620ea24be94 stanza_router: Removed global function core_handle_stanza
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parents: 1105
diff changeset
256 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
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parents: 1105
diff changeset
257 end
1447
cc20d6dfa32d modulemanager: Don't close stream on stream:error with unsupported-stanza-type (fixes #102)
Waqas Hussain <waqas20@gmail.com>
parents: 1394
diff changeset
258 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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diff changeset
259 origin:close("unsupported-stanza-type");
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260 end
578
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diff changeset
261 end
5879264e28e2 Changed module manager to use multitable (initial commit)
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262 end
39
89877d61ac51 Add support for arbitrary events and event hooks
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diff changeset
263
745
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diff changeset
264 function module_has_method(module, method)
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diff changeset
265 return type(module.module[method]) == "function";
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266 end
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267
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40837f3422ab modulemanager: Add get_host_type() API method, and fix up call_module_method to work properly
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diff changeset
268 function call_module_method(module, method, ...)
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diff changeset
269 if module_has_method(module, method) then
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172c43d735e9 modulemanager: Really fix call_module_method to work properly
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parents: 747
diff changeset
270 local f = module.module[method];
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diff changeset
271 return pcall(f, ...);
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diff changeset
272 else
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diff changeset
273 return false, "no-such-method";
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274 end
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275 end
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276
438
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diff changeset
277 ----- API functions exposed to modules -----------
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278 -- Must all be in api.*
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279
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280 -- Returns the name of the current module
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281 function api:get_name()
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282 return self.name;
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283 end
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284
193f9dd64f17 Bumper commit for the new modulemanager API \o/ Updates all the modules, though some more changes may be in store.
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diff changeset
285 -- Returns the host that the current module is serving
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diff changeset
286 function api:get_host()
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diff changeset
287 return self.host;
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288 end
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289
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parents: 746
diff changeset
290 function api:get_host_type()
40837f3422ab modulemanager: Add get_host_type() API method, and fix up call_module_method to work properly
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parents: 746
diff changeset
291 return hosts[self.host].type;
40837f3422ab modulemanager: Add get_host_type() API method, and fix up call_module_method to work properly
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parents: 746
diff changeset
292 end
40837f3422ab modulemanager: Add get_host_type() API method, and fix up call_module_method to work properly
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parents: 746
diff changeset
293
746
7027de4c039d modulemanager: Add module:set_global() as a cleaner way for a module to declare itself 'global'
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parents: 745
diff changeset
294 function api:set_global()
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parents: 745
diff changeset
295 self.host = "*";
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034e345c0f8d modulemanager: Update logger when a module becomes global
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diff changeset
296 -- Update the logger
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parents: 929
diff changeset
297 local _log = logger.init("mod_"..self.name);
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diff changeset
298 self.log = function (self, ...) return _log(...); end;
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diff changeset
299 self._log = _log;
746
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parents: 745
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300 end
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301
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diff changeset
302 local function _add_handler(module, origin_type, tag, xmlns, handler)
591
980ded4c60ef Removed unused variables
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parents: 590
diff changeset
303 local handlers = stanza_handlers:get(module.host, origin_type, tag, xmlns);
590
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parents: 589
diff changeset
304 local msg = (tag == "iq") and "namespace" or "payload namespace";
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parents: 573
diff changeset
305 if not handlers then
591
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parents: 590
diff changeset
306 stanza_handlers:add(module.host, origin_type, tag, xmlns, handler);
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parents: 573
diff changeset
307 handler_info[handler] = module;
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d5cf10b7fc44 Modulemanager: Basic modules can now be unloaded correctly
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parents: 637
diff changeset
308 handler_table:add(module.host, module.name, {module.host, origin_type, tag, xmlns});
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b1aedec00661 modulemanager: Comment out logging of modules hooking stanzas, too noisy
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parents: 713
diff changeset
309 --module:log("debug", "I now handle tag '%s' [%s] with %s '%s'", tag, origin_type, msg, xmlns);
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diff changeset
310 else
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311 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);
578
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312 end
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diff changeset
313 end
438
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314
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diff changeset
315 function api:add_handler(origin_type, tag, xmlns, handler)
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diff changeset
316 if not (origin_type and tag and xmlns and handler) then return false; end
438
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parents: 400
diff changeset
317 if type(origin_type) == "table" then
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diff changeset
318 for _, origin_type in ipairs(origin_type) do
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diff changeset
319 _add_handler(self, origin_type, tag, xmlns, handler);
438
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320 end
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321 else
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322 _add_handler(self, origin_type, tag, xmlns, handler);
438
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323 end
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324 end
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diff changeset
325 function api:add_iq_handler(origin_type, xmlns, handler)
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326 self:add_handler(origin_type, "iq", xmlns, handler);
438
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327 end
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diff changeset
328
540
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parents: 519
diff changeset
329 function api:add_feature(xmlns)
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parents: 1695
diff changeset
330 self:add_item("feature", xmlns);
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parents: 519
diff changeset
331 end
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parents: 1694
diff changeset
332 function api:add_identity(category, type, name)
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parents: 1695
diff changeset
333 self:add_item("identity", {category = category, type = type, name = name});
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parents: 1330
diff changeset
334 end
540
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parents: 519
diff changeset
335
686
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parents: 675
diff changeset
336 local event_hook = function(host, mod_name, event_name, ...)
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parents: 675
diff changeset
337 if type((...)) == "table" and (...).host and (...).host ~= host then return; end
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parents: 675
diff changeset
338 for handler in pairs(event_hooks:get(host, mod_name, event_name) or NULL) do
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parents: 675
diff changeset
339 handler(...);
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diff changeset
340 end
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parents: 675
diff changeset
341 end;
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parents: 675
diff changeset
342 function api:add_event_hook(name, handler)
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diff changeset
343 if not hooked:get(self.host, self.name, name) then
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parents: 675
diff changeset
344 eventmanager.add_event_hook(name, function(...) event_hook(self.host, self.name, name, ...); end);
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diff changeset
345 hooked:set(self.host, self.name, name, true);
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diff changeset
346 end
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diff changeset
347 event_hooks:set(self.host, self.name, name, handler, true);
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diff changeset
348 end
438
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diff changeset
349
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565e16ee0c74 modulemanager: Add module:fire_event() to module API
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diff changeset
350 function api:fire_event(...)
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parents: 1250
diff changeset
351 return (hosts[self.host] or prosody).events.fire_event(...);
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parents: 1174
diff changeset
352 end
565e16ee0c74 modulemanager: Add module:fire_event() to module API
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parents: 1174
diff changeset
353
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parents: 1318
diff changeset
354 function api:hook(event, handler, priority)
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parents: 1253
diff changeset
355 hooks:set(self.host, self.name, event, handler, true);
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parents: 1318
diff changeset
356 (hosts[self.host] or prosody).events.add_handler(event, handler, priority);
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parents: 1183
diff changeset
357 end
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parents: 1183
diff changeset
358
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parents: 1318
diff changeset
359 function api:hook_stanza(xmlns, name, handler, priority)
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parents: 1309
diff changeset
360 if not handler and type(name) == "function" then
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parents: 1309
diff changeset
361 -- If only 2 options then they specified no xmlns
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parents: 1318
diff changeset
362 xmlns, name, handler, priority = nil, xmlns, name, handler;
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0698d0d39b35 modulemanager: Don't require xmlns to be non-nil
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parents: 1320
diff changeset
363 elseif not (handler and name) then
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parents: 1319
diff changeset
364 self:log("warn", "Error: Insufficient parameters to module:hook_stanza()");
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parents: 1309
diff changeset
365 return;
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diff changeset
366 end
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parents: 1318
diff changeset
367 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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parents: 1309
diff changeset
368 end
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diff changeset
369
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parents: 1361
diff changeset
370 function api:require(lib)
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parents: 1361
diff changeset
371 local f, n = pluginloader.load_code(self.name, lib..".lib.lua");
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parents: 1361
diff changeset
372 if not f then
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parents: 1361
diff changeset
373 f, n = pluginloader.load_code(lib, lib..".lib.lua");
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diff changeset
374 end
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parents: 1361
diff changeset
375 if not f then error("Failed to load plugin library '"..lib.."', error: "..n); end -- FIXME better error message
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parents: 1392
diff changeset
376 setfenv(f, setmetatable({ module = self }, { __index = _G }));
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diff changeset
377 return f();
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diff changeset
378 end
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parents: 1361
diff changeset
379
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parents: 1523
diff changeset
380 function api:get_option(name, default_value)
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parents: 1523
diff changeset
381 return config.get(self.host, self.name, name) or config.get(self.host, "core", name) or default_value;
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parents: 1523
diff changeset
382 end
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parents: 1523
diff changeset
383
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384 local t_remove = _G.table.remove;
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385 local module_items = multitable_new();
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386 function api:add_item(key, value)
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387 self.items = self.items or {};
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388 self.items[key] = self.items[key] or {};
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389 t_insert(self.items[key], value);
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390 self:fire_event("item-added/"..key, {source = self, item = value});
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391 end
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392 function api:remove_item(key, value)
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393 local t = self.items and self.items[key] or NULL;
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394 for i = #t,1,-1 do
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395 if t[i] == value then
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396 t_remove(self.items[key], i);
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397 self:fire_event("item-removed/"..key, {source = self, item = value});
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398 return value;
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399 end
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400 end
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401 end
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402
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403 function api:get_host_items(key)
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404 local result = {};
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405 for mod_name, module in pairs(modulemap[self.host]) do
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406 module = module.module;
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407 if module.items then
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408 for _, item in ipairs(module.items[key] or NULL) do
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409 t_insert(result, item);
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410 end
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411 end
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412 end
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413 return result;
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414 end
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415
438
193f9dd64f17 Bumper commit for the new modulemanager API \o/ Updates all the modules, though some more changes may be in store.
Matthew Wild <mwild1@gmail.com>
parents: 400
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416 --------------------------------------------------------------------
193f9dd64f17 Bumper commit for the new modulemanager API \o/ Updates all the modules, though some more changes may be in store.
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417
698
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418 local actions = {};
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419
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420 function actions.load(params)
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421 --return true, "Module loaded ("..params.module.." on "..params.host..")";
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422 return load(params.host, params.module);
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423 end
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parents: 695
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424
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parents: 695
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425 function actions.unload(params)
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426 return unload(params.host, params.module);
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427 end
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parents: 695
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428
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429 register_actions("/modules", actions);
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430
39
89877d61ac51 Add support for arbitrary events and event hooks
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431 return _M;