Mon, 10 Nov 2008 16:29:19 +0100
Merging.
30 | 1 | |
2 | local log = require "util.logger".init("modulemanager") | |
3 | ||
4 | local loadfile, pcall = loadfile, pcall; | |
5 | local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv; | |
6 | local pairs, ipairs = pairs, ipairs; | |
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7 | local t_insert = table.insert; |
30 | 8 | local type = type; |
9 | ||
10 | local tostring, print = tostring, print; | |
11 | ||
12 | local _G = _G; | |
13 | ||
14 | module "modulemanager" | |
15 | ||
16 | local handler_info = {}; | |
17 | local handlers = {}; | |
18 | ||
19 | local modulehelpers = setmetatable({}, { __index = _G }); | |
20 | ||
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21 | local function _add_iq_handler(module, origin_type, xmlns, handler) |
30 | 22 | handlers[origin_type] = handlers[origin_type] or {}; |
23 | handlers[origin_type].iq = handlers[origin_type].iq or {}; | |
24 | if not handlers[origin_type].iq[xmlns] then | |
25 | handlers[origin_type].iq[xmlns]= handler; | |
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26 | handler_info[handler] = module; |
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27 | log("debug", "mod_%s now handles tag 'iq' with query namespace '%s'", module.name, xmlns); |
30 | 28 | else |
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29 | 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); |
30 | 30 | end |
31 | end | |
32 | ||
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33 | function modulehelpers.add_iq_handler(origin_type, xmlns, handler) |
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34 | if not (origin_type and handler and xmlns) then return false; end |
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35 | if type(origin_type) == "table" then |
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36 | for _, origin_type in ipairs(origin_type) do |
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37 | _add_iq_handler(getfenv(2).module, origin_type, xmlns, handler); |
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38 | end |
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39 | return; |
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40 | end |
197 | 41 | _add_iq_handler(getfenv(2).module, origin_type, xmlns, handler); |
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42 | end |
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43 | |
191 | 44 | local function _add_handler(module, origin_type, tag, xmlns, handler) |
38 | 45 | handlers[origin_type] = handlers[origin_type] or {}; |
46 | if not handlers[origin_type][tag] then | |
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47 | handlers[origin_type][tag] = handlers[origin_type][tag] or {}; |
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48 | handlers[origin_type][tag][xmlns]= handler; |
191 | 49 | handler_info[handler] = module; |
50 | log("debug", "mod_%s now handles tag '%s'", module.name, tag); | |
38 | 51 | elseif handler_info[handlers[origin_type][tag]] then |
191 | 52 | 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); |
38 | 53 | end |
30 | 54 | end |
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55 | |
191 | 56 | function modulehelpers.add_handler(origin_type, tag, xmlns, handler) |
57 | if not (origin_type and tag and xmlns and handler) then return false; end | |
58 | if type(origin_type) == "table" then | |
59 | for _, origin_type in ipairs(origin_type) do | |
60 | _add_handler(getfenv(2).module, origin_type, tag, xmlns, handler); | |
61 | end | |
62 | return; | |
63 | end | |
64 | _add_handler(getfenv(2).module, origin_type, tag, xmlns, handler); | |
65 | end | |
66 | ||
30 | 67 | function load(name) |
68 | local mod, err = loadfile("plugins/mod_"..name..".lua"); | |
69 | if not mod then | |
70 | log("error", "Unable to load module '%s': %s", name or "nil", err or "nil"); | |
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71 | return nil, err; |
30 | 72 | end |
73 | ||
74 | local pluginenv = setmetatable({ module = { name = name } }, { __index = modulehelpers }); | |
75 | ||
76 | setfenv(mod, pluginenv); | |
77 | local success, ret = pcall(mod); | |
78 | if not success then | |
79 | log("error", "Error initialising module '%s': %s", name or "nil", ret or "nil"); | |
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80 | return nil, err; |
30 | 81 | end |
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82 | return true; |
30 | 83 | end |
84 | ||
85 | function handle_stanza(origin, stanza) | |
38 | 86 | local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns, origin.type; |
30 | 87 | |
38 | 88 | if name == "iq" and xmlns == "jabber:client" and handlers[origin_type] then |
30 | 89 | log("debug", "Stanza is an <iq/>"); |
90 | local child = stanza.tags[1]; | |
91 | if child then | |
92 | local xmlns = child.attr.xmlns; | |
93 | log("debug", "Stanza has xmlns: %s", xmlns); | |
94 | local handler = handlers[origin_type][name][xmlns]; | |
95 | if handler then | |
96 | log("debug", "Passing stanza to mod_%s", handler_info[handler].name); | |
97 | return handler(origin, stanza) or true; | |
98 | end | |
99 | ||
100 | end | |
38 | 101 | elseif handlers[origin_type] then |
102 | local handler = handlers[origin_type][name]; | |
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 |
38 | 109 | end |
30 | 110 | end |
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111 | log("debug", "Stanza unhandled by any modules, xmlns: %s", stanza.attr.xmlns); |
30 | 112 | return false; -- we didn't handle it |
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; |