prosody
193f9dd64f17
core/modulemanager.lua

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core/modulemanager.lua @ 438:193f9dd64f17

Bumper commit for the new modulemanager API \o/ Updates all the modules, though some more changes may be in store.
author Matthew Wild <mwild1@gmail.com>
date Thu, 27 Nov 2008 03:12:12 +0000
parent 400:068a813b6454
child 439:6608ad3a72f3
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3 local logger = require "util.logger";
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4 local log = logger.init("modulemanager")
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6 local loadfile, pcall = loadfile, pcall;
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7 local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv;
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8 local pairs, ipairs = pairs, ipairs;
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9 local t_insert = table.insert;
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10 local type = type;
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12 local tostring, print = tostring, print;
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14 local _G = _G;
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15 local debug = debug;
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17 module "modulemanager"
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19 local api = {}; -- Module API container
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21 local modulemap = {};
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23 local handler_info = {};
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24 local stanza_handlers = {};
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26 local modulehelpers = setmetatable({}, { __index = _G });
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29 function load(host, module_name, config)
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30 local mod, err = loadfile("plugins/mod_"..module_name..".lua");
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31 if not mod then
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32 log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil");
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33 return nil, err;
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34 end
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36 if not modulemap[host] then
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37 modulemap[host] = {};
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38 stanza_handlers[host] = {};
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39 elseif modulemap[host][module_name] then
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40 log("warn", "%s is already loaded for %s, so not loading again", module_name, host);
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41 return nil, "module-already-loaded";
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42 end
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44 local _log = logger.init(host..":"..module_name);
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45 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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47 local pluginenv = setmetatable({ module = api_instance }, { __index = _G });
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49 setfenv(mod, pluginenv);
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51 local success, ret = pcall(mod);
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52 if not success then
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53 log("error", "Error initialising module '%s': %s", name or "nil", ret or "nil");
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54 return nil, ret;
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55 end
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57 modulemap[host][module_name] = mod;
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58
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59 return true;
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60 end
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62 function handle_stanza(host, origin, stanza)
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63 local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns, origin.type;
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65 local handlers = stanza_handlers[host];
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66 if not handlers then
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67 log("warn", "No handlers for %s", host);
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68 return false;
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69 end
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71 if name == "iq" and xmlns == "jabber:client" and handlers[origin_type] then
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72 local child = stanza.tags[1];
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73 if child then
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74 local xmlns = child.attr.xmlns or xmlns;
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75 log("debug", "Stanza of type %s from %s has xmlns: %s", name, origin_type, xmlns);
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76 local handler = handlers[origin_type][name] and handlers[origin_type][name][xmlns];
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77 if handler then
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78 log("debug", "Passing stanza to mod_%s", handler_info[handler].name);
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79 return handler(origin, stanza) or true;
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80 end
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81 end
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82 elseif handlers[origin_type] then
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83 local handler = handlers[origin_type][name];
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84 if handler then
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85 handler = handler[xmlns];
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86 if handler then
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87 log("debug", "Passing stanza to mod_%s", handler_info[handler].name);
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88 return handler(origin, stanza) or true;
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89 end
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90 end
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91 end
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92 log("debug", "Stanza unhandled by any modules, xmlns: %s", stanza.attr.xmlns);
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93 return false; -- we didn't handle it
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94 end
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95
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96 ----- API functions exposed to modules -----------
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97 -- Must all be in api.*
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98
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99 -- Returns the name of the current module
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100 function api:get_name()
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101 return self.name;
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102 end
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103
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104 -- Returns the host that the current module is serving
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105 function api:get_host()
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106 return self.host;
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107 end
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108
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109
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110 local function _add_iq_handler(module, origin_type, xmlns, handler)
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111 local handlers = stanza_handlers[module.host];
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112 handlers[origin_type] = handlers[origin_type] or {};
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113 handlers[origin_type].iq = handlers[origin_type].iq or {};
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114 if not handlers[origin_type].iq[xmlns] then
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115 handlers[origin_type].iq[xmlns]= handler;
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116 handler_info[handler] = module;
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117 module:log("debug", "I now handle tag 'iq' [%s] with payload namespace '%s'", origin_type, xmlns);
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118 else
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119 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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120 end
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121 end
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122
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123 function api:add_iq_handler(origin_type, xmlns, handler)
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124 if not (origin_type and handler and xmlns) then return false; end
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125 if type(origin_type) == "table" then
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126 for _, origin_type in ipairs(origin_type) do
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127 _add_iq_handler(self, origin_type, xmlns, handler);
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128 end
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129 return;
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130 end
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131 _add_iq_handler(self, origin_type, xmlns, handler);
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132 end
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133
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134
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135 do
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136 local event_handlers = {};
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137
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138 function api:add_event_hook(name, handler)
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139 if not event_handlers[name] then
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140 event_handlers[name] = {};
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141 end
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142 t_insert(event_handlers[name] , handler);
438
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143 self:log("debug", "Subscribed to %s", name);
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144 end
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145
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146 function fire_event(name, ...)
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147 local event_handlers = event_handlers[name];
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148 if event_handlers then
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149 for name, handler in ipairs(event_handlers) do
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150 handler(...);
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151 end
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152 end
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153 end
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154 end
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155
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156
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157 local function _add_handler(module, origin_type, tag, xmlns, handler)
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158 local handlers = stanza_handlers[module.host];
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159 handlers[origin_type] = handlers[origin_type] or {};
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160 if not handlers[origin_type][tag] then
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161 handlers[origin_type][tag] = handlers[origin_type][tag] or {};
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162 handlers[origin_type][tag][xmlns]= handler;
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163 handler_info[handler] = module;
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164 module:log("debug", "I now handle tag '%s' [%s] with xmlns '%s'", tag, origin_type, xmlns);
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165 elseif handler_info[handlers[origin_type][tag]] then
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166 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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167 end
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168 end
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169
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170 function api:add_handler(origin_type, tag, xmlns, handler)
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171 if not (origin_type and tag and xmlns and handler) then return false; end
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172 if type(origin_type) == "table" then
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173 for _, origin_type in ipairs(origin_type) do
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174 _add_handler(self, origin_type, tag, xmlns, handler);
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175 end
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176 return;
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177 end
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178 _add_handler(self, origin_type, tag, xmlns, handler);
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179 end
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180
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181 --------------------------------------------------------------------
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182
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183 return _M;