prosody
b828d7d47973
core/modulemanager.lua

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core/modulemanager.lua @ 586:b828d7d47973

Add posix support library, and adjust makefiles for it
author Matthew Wild <mwild1@gmail.com>
date Sat, 06 Dec 2008 23:20:59 +0000
parent 584:eb0cea29c8d7
child 592:c6e2c727d0cc
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1 -- Prosody IM v0.1
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2 -- Copyright (C) 2008 Matthew Wild
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3 -- Copyright (C) 2008 Waqas Hussain
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4 --
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5 -- This program is free software; you can redistribute it and/or
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6 -- modify it under the terms of the GNU General Public License
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7 -- as published by the Free Software Foundation; either version 2
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8 -- of the License, or (at your option) any later version.
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9 --
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10 -- This program is distributed in the hope that it will be useful,
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11 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 -- GNU General Public License for more details.
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14 --
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15 -- You should have received a copy of the GNU General Public License
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16 -- along with this program; if not, write to the Free Software
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17 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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18 --
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19
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22 local plugin_dir = CFG_PLUGINDIR or "./plugins/";
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24 local logger = require "util.logger";
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25 local log = logger.init("modulemanager");
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26 local addDiscoInfoHandler = require "core.discomanager".addDiscoInfoHandler;
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27 local eventmanager = require "core.eventmanager";
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28 local config = require "core.configmanager";
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29 local multitable_new = require "util.multitable".new;
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32 local loadfile, pcall = loadfile, pcall;
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33 local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv;
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34 local pairs, ipairs = pairs, ipairs;
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35 local t_insert = table.insert;
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36 local type = type;
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37
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38 local tostring, print = tostring, print;
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39
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40 -- We need this to let modules access the real global namespace
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41 local _G = _G;
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42
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43 module "modulemanager"
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44
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45 local api = {}; -- Module API container
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46
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47 local modulemap = { ["*"] = {} };
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48
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49 local m_handler_info = multitable_new();
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50 local m_stanza_handlers = multitable_new();
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51 local handler_info = {};
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52 local stanza_handlers = {};
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53
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54 local modulehelpers = setmetatable({}, { __index = _G });
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56 -- Load modules when a host is activated
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57 function load_modules_for_host(host)
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58 local modules_enabled = config.get(host, "core", "modules_enabled");
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59 if modules_enabled then
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60 for _, module in pairs(modules_enabled) do
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61 load(host, module);
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62 end
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63 end
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64 end
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65 eventmanager.add_event_hook("host-activated", load_modules_for_host);
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66 --
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67
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68 function load(host, module_name, config)
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69 if not (host and module_name) then
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70 return nil, "insufficient-parameters";
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71 end
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73 if not modulemap[host] then
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74 modulemap[host] = {};
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75 stanza_handlers[host] = {};
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76 elseif modulemap[host][module_name] then
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77 log("warn", "%s is already loaded for %s, so not loading again", module_name, host);
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78 return nil, "module-already-loaded";
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79 elseif modulemap["*"][module_name] then
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80 return nil, "global-module-already-loaded";
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81 end
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82
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83
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84 local mod, err = loadfile(plugin_dir.."mod_"..module_name..".lua");
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85 if not mod then
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86 log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil");
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87 return nil, err;
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88 end
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89
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90 local _log = logger.init(host..":"..module_name);
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91 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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92
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93 local pluginenv = setmetatable({ module = api_instance }, { __index = _G });
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94
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95 setfenv(mod, pluginenv);
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96
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97 local success, ret = pcall(mod);
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98 if not success then
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99 log("error", "Error initialising module '%s': %s", name or "nil", ret or "nil");
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100 return nil, ret;
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101 end
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102
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103 -- Use modified host, if the module set one
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104 modulemap[api_instance.host][module_name] = mod;
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105
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106 return true;
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107 end
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108
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109 function is_loaded(host, name)
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110 return modulemap[host] and modulemap[host][name] and true;
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111 end
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112
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113 function unload(host, name, ...)
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114 local mod = modulemap[host] and modulemap[host][name];
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115 if not mod then return nil, "module-not-loaded"; end
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116
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117 if type(mod.unload) == "function" then
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118 local ok, err = pcall(mod.unload, ...)
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119 if (not ok) and err then
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120 log("warn", "Non-fatal error unloading module '%s' from '%s': %s", name, host, err);
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121 end
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122 end
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123
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124 end
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125
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126 function _handle_stanza(host, origin, stanza)
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127 local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns, origin.type;
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129 local handlers = stanza_handlers[host];
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130 if not handlers then
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131 log("warn", "No handlers for %s", host);
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132 return false;
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133 end
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134
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135 if name == "iq" and xmlns == "jabber:client" and handlers[origin_type] then
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136 local child = stanza.tags[1];
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137 if child then
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138 local xmlns = child.attr.xmlns or xmlns;
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139 log("debug", "Stanza of type %s from %s has xmlns: %s", name, origin_type, xmlns);
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140 local handler = handlers[origin_type][name] and handlers[origin_type][name][xmlns];
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141 if handler then
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142 log("debug", "Passing stanza to mod_%s", handler_info[handler].name);
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143 return handler(origin, stanza) or true;
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144 end
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145 end
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146 elseif handlers[origin_type] then
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147 local handler = handlers[origin_type][name];
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148 if handler then
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149 handler = handler[xmlns];
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150 if handler then
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151 log("debug", "Passing stanza to mod_%s", handler_info[handler].name);
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152 return handler(origin, stanza) or true;
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153 end
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154 end
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155 end
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156 log("debug", "Stanza unhandled by any modules, xmlns: %s", stanza.attr.xmlns);
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157 return false; -- we didn't handle it
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158 end
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159 function handle_stanza(host, origin, stanza)
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160 local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns, origin.type;
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161 if name == "iq" and xmlns == "jabber:client" then
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162 xmlns = stanza.tags[1].attr.xmlns;
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163 log("debug", "Stanza of type %s from %s has xmlns: %s", name, origin_type, xmlns);
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164 end
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165 local handlers = m_stanza_handlers:get(host, origin_type, name, xmlns);
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166 if handlers then
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167 log("debug", "Passing stanza to mod_%s", handler_info[handlers[1]].name);
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168 (handlers[1])(origin, stanza);
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169 return true;
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170 else
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171 log("debug", "Stanza unhandled by any modules, xmlns: %s", stanza.attr.xmlns); -- we didn't handle it
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172 end
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173 end
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174
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175 ----- API functions exposed to modules -----------
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176 -- Must all be in api.*
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177
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178 -- Returns the name of the current module
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179 function api:get_name()
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180 return self.name;
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181 end
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182
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183 -- Returns the host that the current module is serving
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184 function api:get_host()
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185 return self.host;
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186 end
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187
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188
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189 local function __add_iq_handler(module, origin_type, xmlns, handler)
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190 local handlers = stanza_handlers[module.host];
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191 handlers[origin_type] = handlers[origin_type] or {};
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192 handlers[origin_type].iq = handlers[origin_type].iq or {};
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193 if not handlers[origin_type].iq[xmlns] then
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194 handlers[origin_type].iq[xmlns]= handler;
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195 handler_info[handler] = module;
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196 module:log("debug", "I now handle tag 'iq' [%s] with payload namespace '%s'", origin_type, xmlns);
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197 else
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198 module:log("warn", "I wanted to handle tag 'iq' [%s] with payload namespace '%s' but mod_%s already handles that", origin_type, xmlns, handler_info[handlers[origin_type].iq[xmlns]].name);
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199 end
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200 end
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201 local function _add_iq_handler(module, origin_type, xmlns, handler)
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202 local handlers = m_stanza_handlers:get(module.host, origin_type, "iq", xmlns);
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203 if not handlers then
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204 m_stanza_handlers:add(module.host, origin_type, "iq", xmlns, handler);
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205 handler_info[handler] = module;
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206 module:log("debug", "I now handle tag 'iq' [%s] with payload namespace '%s'", origin_type, xmlns);
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207 else
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208 module:log("warn", "I wanted to handle tag 'iq' [%s] with payload namespace '%s' but mod_%s already handles that", origin_type, xmlns, handler_info[handlers[1]].name);
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209 end
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210 end
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211
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212 function api:add_iq_handler(origin_type, xmlns, handler)
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213 if not (origin_type and handler and xmlns) then return false; end
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214 if type(origin_type) == "table" then
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215 for _, origin_type in ipairs(origin_type) do
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216 _add_iq_handler(self, origin_type, xmlns, handler);
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217 end
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218 return;
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219 end
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220 _add_iq_handler(self, origin_type, xmlns, handler);
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221 end
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222
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223 function api:add_feature(xmlns)
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224 addDiscoInfoHandler(self.host, function(reply, to, from, node)
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225 if #node == 0 then
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226 reply:tag("feature", {var = xmlns}):up();
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227 return true;
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228 end
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229 end);
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230 end
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231
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232 function api:add_event_hook (...) return eventmanager.add_event_hook(...); end
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233
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234 local function __add_handler(module, origin_type, tag, xmlns, handler)
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235 local handlers = stanza_handlers[module.host];
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236 handlers[origin_type] = handlers[origin_type] or {};
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237 if not handlers[origin_type][tag] then
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238 handlers[origin_type][tag] = handlers[origin_type][tag] or {};
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239 handlers[origin_type][tag][xmlns]= handler;
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240 handler_info[handler] = module;
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241 module:log("debug", "I now handle tag '%s' [%s] with xmlns '%s'", tag, origin_type, xmlns);
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242 elseif handler_info[handlers[origin_type][tag]] then
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243 log("warning", "I wanted to handle tag '%s' [%s] but mod_%s already handles that", tag, origin_type, handler_info[handlers[origin_type][tag]].module.name);
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244 end
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245 end
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246 local function _add_handler(module, origin_type, tag, xmlns, handler)
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247 local handlers = m_stanza_handlers:get(module.host, origin_type, tag, xmlns);
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248 if not handlers then
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249 m_stanza_handlers:add(module.host, origin_type, tag, xmlns, handler);
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250 handler_info[handler] = module;
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251 module:log("debug", "I now handle tag '%s' [%s] with xmlns '%s'", tag, origin_type, xmlns);
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252 else
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253 module:log("warning", "I wanted to handle tag '%s' [%s] but mod_%s already handles that", tag, origin_type, handler_info[handlers[1]].module.name);
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254 end
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255 end
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256
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257 function api:add_handler(origin_type, tag, xmlns, handler)
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258 if not (origin_type and tag and xmlns and handler) then return false; end
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259 if type(origin_type) == "table" then
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260 for _, origin_type in ipairs(origin_type) do
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261 _add_handler(self, origin_type, tag, xmlns, handler);
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262 end
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263 return;
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264 end
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Matthew Wild <mwild1@gmail.com>
parents: 400
diff changeset
265 _add_handler(self, origin_type, tag, xmlns, handler);
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
diff changeset
266 end
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
diff changeset
267
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
diff changeset
268 --------------------------------------------------------------------
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
diff changeset
269
39
89877d61ac51 Add support for arbitrary events and event hooks
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
270 return _M;