prosody
de4fa6f3cccf
core/modulemanager.lua

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core/modulemanager.lua @ 395:de4fa6f3cccf

Backed out changeset 79bd7a3e906c
author Matthew Wild <mwild1@gmail.com>
date Sun, 23 Nov 2008 05:43:17 +0000
parent 391:79bd7a3e906c
child 397:d07ae6788196
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2 local log = require "util.logger".init("modulemanager")
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4 local loadfile, pcall = loadfile, pcall;
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5 local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv;
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6 local pairs, ipairs = pairs, ipairs;
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7 local t_insert = table.insert;
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8 local type = type;
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10 local tostring, print = tostring, print;
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12 local _G = _G;
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13 local debug = debug;
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15 module "modulemanager"
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17 local handler_info = {};
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18 local handlers = {};
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20 local modulehelpers = setmetatable({}, { __index = _G });
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21
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22 local function _add_iq_handler(module, origin_type, xmlns, handler)
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23 handlers[origin_type] = handlers[origin_type] or {};
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24 handlers[origin_type].iq = handlers[origin_type].iq or {};
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25 if not handlers[origin_type].iq[xmlns] then
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26 handlers[origin_type].iq[xmlns]= handler;
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27 handler_info[handler] = module;
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28 log("debug", "mod_%s now handles tag 'iq' with query namespace '%s'", module.name, xmlns);
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29 else
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30 log("warning", "mod_%s wants to handle tag 'iq' with query namespace '%s' but mod_%s already handles that", module.name, xmlns, handler_info[handlers[origin_type].iq[xmlns]].module.name);
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31 end
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32 end
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34 function modulehelpers.add_iq_handler(origin_type, xmlns, handler)
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35 if not (origin_type and handler and xmlns) then return false; end
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36 if type(origin_type) == "table" then
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37 for _, origin_type in ipairs(origin_type) do
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38 _add_iq_handler(getfenv(2).module, origin_type, xmlns, handler);
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39 end
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40 return;
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41 end
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42 _add_iq_handler(getfenv(2).module, origin_type, xmlns, handler);
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43 end
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44
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45 local function _add_handler(module, origin_type, tag, xmlns, handler)
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46 handlers[origin_type] = handlers[origin_type] or {};
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47 if not handlers[origin_type][tag] then
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48 handlers[origin_type][tag] = handlers[origin_type][tag] or {};
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49 handlers[origin_type][tag][xmlns]= handler;
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50 handler_info[handler] = module;
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51 log("debug", "mod_%s now handles tag '%s'", module.name, tag);
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52 elseif handler_info[handlers[origin_type][tag]] then
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53 log("warning", "mod_%s wants to handle tag '%s' but mod_%s already handles that", module.name, tag, handler_info[handlers[origin_type][tag]].module.name);
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54 end
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55 end
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57 function modulehelpers.add_handler(origin_type, tag, xmlns, handler)
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58 if not (origin_type and tag and xmlns and handler) then return false; end
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59 if type(origin_type) == "table" then
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60 for _, origin_type in ipairs(origin_type) do
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61 _add_handler(getfenv(2).module, origin_type, tag, xmlns, handler);
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62 end
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63 return;
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64 end
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65 _add_handler(getfenv(2).module, origin_type, tag, xmlns, handler);
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66 end
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67
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68 function load(name)
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69 local mod, err = loadfile("plugins/mod_"..name..".lua");
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70 if not mod then
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71 log("error", "Unable to load module '%s': %s", name or "nil", err or "nil");
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72 return nil, err;
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73 end
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75 local pluginenv = setmetatable({ module = { name = name } }, { __index = modulehelpers });
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77 setfenv(mod, pluginenv);
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78 local success, ret = pcall(mod);
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79 if not success then
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80 log("error", "Error initialising module '%s': %s", name or "nil", ret or "nil");
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81 return nil, err;
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82 end
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83 return true;
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84 end
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85
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86 function handle_stanza(origin, stanza)
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87 local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns, origin.type;
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88
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89 if name == "iq" and xmlns == "jabber:client" and handlers[origin_type] then
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90 log("debug", "Stanza is an <iq/>");
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91 local child = stanza.tags[1];
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92 if child then
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93 local xmlns = child.attr.xmlns or xmlns;
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94 log("debug", "Stanza of type %s from %s has xmlns: %s", name, origin_type, xmlns);
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95 local handler = handlers[origin_type][name] and handlers[origin_type][name][xmlns];
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96 if handler then
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97 log("debug", "Passing stanza to mod_%s", handler_info[handler].name);
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98 return handler(origin, stanza) or true;
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99 end
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100 end
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101 elseif handlers[origin_type] then
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102 local handler = handlers[origin_type][name];
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103 if handler then
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104 handler = handler[xmlns];
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105 if handler then
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106 log("debug", "Passing stanza to mod_%s", handler_info[handler].name);
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107 return handler(origin, stanza) or true;
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108 end
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109 end
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110 end
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111 log("debug", "Stanza unhandled by any modules, xmlns: %s", stanza.attr.xmlns);
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112 return false; -- we didn't handle it
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113 end
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114
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115 do
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116 local event_handlers = {};
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117
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118 function modulehelpers.add_event_hook(name, handler)
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119 if not event_handlers[name] then
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120 event_handlers[name] = {};
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121 end
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122 t_insert(event_handlers[name] , handler);
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123 end
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124
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125 function fire_event(name, ...)
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126 local event_handlers = event_handlers[name];
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127 if event_handlers then
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128 for name, handler in ipairs(event_handlers) do
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129 handler(...);
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130 end
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131 end
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132 end
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133 end
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134
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135 return _M;