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core/moduleapi.lua @ 6644:6cb6855f60df
util.datamanager: Fix traceback due to %s in log message
author | Kim Alvefur <zash@zash.se> |
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date | Fri, 03 Apr 2015 12:10:30 +0200 |
parent | 5530:d83482fc4a81 |
child | 5771:c4ed6680bf8d |
rev | line source |
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1 -- Prosody IM |
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2 -- Copyright (C) 2008-2012 Matthew Wild |
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3 -- Copyright (C) 2008-2012 Waqas Hussain |
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4 -- |
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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 local config = require "core.configmanager"; |
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10 local modulemanager = require "modulemanager"; -- This is necessary to avoid require loops |
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11 local array = require "util.array"; |
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12 local set = require "util.set"; |
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13 local logger = require "util.logger"; |
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14 local pluginloader = require "util.pluginloader"; |
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15 local timer = require "util.timer"; |
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16 |
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17 local t_insert, t_remove, t_concat = table.insert, table.remove, table.concat; |
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18 local error, setmetatable, type = error, setmetatable, type; |
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19 local ipairs, pairs, select, unpack = ipairs, pairs, select, unpack; |
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20 local tonumber, tostring = tonumber, tostring; |
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21 |
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22 local prosody = prosody; |
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23 local hosts = prosody.hosts; |
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24 |
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25 -- FIXME: This assert() is to try and catch an obscure bug (2013-04-05) |
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26 local core_post_stanza = assert(prosody.core_post_stanza, |
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27 "prosody.core_post_stanza is nil, please report this as a bug"); |
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28 |
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29 -- Registry of shared module data |
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30 local shared_data = setmetatable({}, { __mode = "v" }); |
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31 |
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32 local NULL = {}; |
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33 |
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34 local api = {}; |
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35 |
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36 -- Returns the name of the current module |
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37 function api:get_name() |
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38 return self.name; |
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39 end |
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40 |
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41 -- Returns the host that the current module is serving |
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42 function api:get_host() |
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43 return self.host; |
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44 end |
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45 |
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46 function api:get_host_type() |
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47 return self.host ~= "*" and hosts[self.host].type or nil; |
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48 end |
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49 |
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50 function api:set_global() |
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51 self.host = "*"; |
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52 -- Update the logger |
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53 local _log = logger.init("mod_"..self.name); |
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54 self.log = function (self, ...) return _log(...); end; |
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55 self._log = _log; |
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56 self.global = true; |
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57 end |
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58 |
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59 function api:add_feature(xmlns) |
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60 self:add_item("feature", xmlns); |
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61 end |
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62 function api:add_identity(category, type, name) |
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63 self:add_item("identity", {category = category, type = type, name = name}); |
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64 end |
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65 function api:add_extension(data) |
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66 self:add_item("extension", data); |
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67 end |
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68 function api:has_feature(xmlns) |
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69 for _, feature in ipairs(self:get_host_items("feature")) do |
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70 if feature == xmlns then return true; end |
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71 end |
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72 return false; |
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73 end |
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74 function api:has_identity(category, type, name) |
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75 for _, id in ipairs(self:get_host_items("identity")) do |
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76 if id.category == category and id.type == type and id.name == name then |
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77 return true; |
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78 end |
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79 end |
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80 return false; |
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81 end |
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82 |
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83 function api:fire_event(...) |
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84 return (hosts[self.host] or prosody).events.fire_event(...); |
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85 end |
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86 |
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87 function api:hook_object_event(object, event, handler, priority) |
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88 self.event_handlers:set(object, event, handler, true); |
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89 return object.add_handler(event, handler, priority); |
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90 end |
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91 |
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92 function api:unhook_object_event(object, event, handler) |
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93 return object.remove_handler(event, handler); |
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94 end |
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95 |
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96 function api:hook(event, handler, priority) |
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97 return self:hook_object_event((hosts[self.host] or prosody).events, event, handler, priority); |
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98 end |
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99 |
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100 function api:hook_global(event, handler, priority) |
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101 return self:hook_object_event(prosody.events, event, handler, priority); |
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102 end |
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103 |
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104 function api:hook_tag(xmlns, name, handler, priority) |
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105 if not handler and type(name) == "function" then |
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106 -- If only 2 options then they specified no xmlns |
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107 xmlns, name, handler, priority = nil, xmlns, name, handler; |
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108 elseif not (handler and name) then |
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109 self:log("warn", "Error: Insufficient parameters to module:hook_stanza()"); |
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110 return; |
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111 end |
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112 return self:hook("stanza/"..(xmlns and (xmlns..":") or "")..name, function (data) return handler(data.origin, data.stanza, data); end, priority); |
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113 end |
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114 api.hook_stanza = api.hook_tag; -- COMPAT w/pre-0.9 |
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115 |
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116 function api:require(lib) |
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117 local f, n = pluginloader.load_code(self.name, lib..".lib.lua", self.environment); |
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118 if not f then |
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119 f, n = pluginloader.load_code(lib, lib..".lib.lua", self.environment); |
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120 end |
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121 if not f then error("Failed to load plugin library '"..lib.."', error: "..n); end -- FIXME better error message |
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122 return f(); |
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123 end |
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124 |
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125 function api:depends(name) |
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126 if not self.dependencies then |
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127 self.dependencies = {}; |
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128 self:hook("module-reloaded", function (event) |
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129 if self.dependencies[event.module] and not self.reloading then |
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130 self:log("info", "Auto-reloading due to reload of %s:%s", event.host, event.module); |
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131 modulemanager.reload(self.host, self.name); |
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132 return; |
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133 end |
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134 end); |
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135 self:hook("module-unloaded", function (event) |
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136 if self.dependencies[event.module] then |
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137 self:log("info", "Auto-unloading due to unload of %s:%s", event.host, event.module); |
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138 modulemanager.unload(self.host, self.name); |
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139 end |
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140 end); |
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141 end |
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142 local mod = modulemanager.get_module(self.host, name) or modulemanager.get_module("*", name); |
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143 if mod and mod.module.host == "*" and self.host ~= "*" |
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144 and modulemanager.module_has_method(mod, "add_host") then |
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145 mod = nil; -- Target is a shared module, so we still want to load it on our host |
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146 end |
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147 if not mod then |
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148 local err; |
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149 mod, err = modulemanager.load(self.host, name); |
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150 if not mod then |
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151 return error(("Unable to load required module, mod_%s: %s"):format(name, ((err or "unknown error"):gsub("%-", " ")) )); |
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152 end |
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153 end |
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154 self.dependencies[name] = true; |
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155 return mod; |
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156 end |
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157 |
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158 -- Returns one or more shared tables at the specified virtual paths |
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159 -- Intentionally does not allow the table at a path to be _set_, it |
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160 -- is auto-created if it does not exist. |
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161 function api:shared(...) |
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162 if not self.shared_data then self.shared_data = {}; end |
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163 local paths = { n = select("#", ...), ... }; |
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164 local data_array = {}; |
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165 local default_path_components = { self.host, self.name }; |
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166 for i = 1, paths.n do |
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167 local path = paths[i]; |
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168 if path:sub(1,1) ~= "/" then -- Prepend default components |
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169 local n_components = select(2, path:gsub("/", "%1")); |
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170 path = (n_components<#default_path_components and "/" or "")..t_concat(default_path_components, "/", 1, #default_path_components-n_components).."/"..path; |
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171 end |
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172 local shared = shared_data[path]; |
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173 if not shared then |
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174 shared = {}; |
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175 if path:match("%-cache$") then |
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176 setmetatable(shared, { __mode = "kv" }); |
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177 end |
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178 shared_data[path] = shared; |
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179 end |
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180 t_insert(data_array, shared); |
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181 self.shared_data[path] = shared; |
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182 end |
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183 return unpack(data_array); |
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184 end |
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185 |
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186 function api:get_option(name, default_value) |
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187 local value = config.get(self.host, name); |
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188 if value == nil then |
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189 value = default_value; |
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190 end |
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191 return value; |
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192 end |
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193 |
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194 function api:get_option_string(name, default_value) |
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195 local value = self:get_option(name, default_value); |
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196 if type(value) == "table" then |
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197 if #value > 1 then |
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198 self:log("error", "Config option '%s' does not take a list, using just the first item", name); |
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199 end |
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200 value = value[1]; |
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201 end |
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202 if value == nil then |
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203 return nil; |
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204 end |
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205 return tostring(value); |
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206 end |
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207 |
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208 function api:get_option_number(name, ...) |
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209 local value = self:get_option(name, ...); |
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210 if type(value) == "table" then |
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211 if #value > 1 then |
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212 self:log("error", "Config option '%s' does not take a list, using just the first item", name); |
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213 end |
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214 value = value[1]; |
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215 end |
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216 local ret = tonumber(value); |
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217 if value ~= nil and ret == nil then |
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218 self:log("error", "Config option '%s' not understood, expecting a number", name); |
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219 end |
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220 return ret; |
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221 end |
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222 |
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223 function api:get_option_boolean(name, ...) |
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224 local value = self:get_option(name, ...); |
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225 if type(value) == "table" then |
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226 if #value > 1 then |
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227 self:log("error", "Config option '%s' does not take a list, using just the first item", name); |
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228 end |
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229 value = value[1]; |
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230 end |
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231 if value == nil then |
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232 return nil; |
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233 end |
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234 local ret = value == true or value == "true" or value == 1 or nil; |
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235 if ret == nil then |
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236 ret = (value == false or value == "false" or value == 0); |
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237 if ret then |
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238 ret = false; |
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239 else |
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240 ret = nil; |
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241 end |
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242 end |
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243 if ret == nil then |
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244 self:log("error", "Config option '%s' not understood, expecting true/false", name); |
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245 end |
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246 return ret; |
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247 end |
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248 |
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249 function api:get_option_array(name, ...) |
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250 local value = self:get_option(name, ...); |
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251 |
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252 if value == nil then |
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253 return nil; |
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254 end |
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255 |
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256 if type(value) ~= "table" then |
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257 return array{ value }; -- Assume any non-list is a single-item list |
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258 end |
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259 |
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260 return array():append(value); -- Clone |
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261 end |
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262 |
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263 function api:get_option_set(name, ...) |
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264 local value = self:get_option_array(name, ...); |
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265 |
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266 if value == nil then |
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267 return nil; |
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268 end |
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269 |
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270 return set.new(value); |
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271 end |
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272 |
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273 function api:get_option_inherited_set(name, ...) |
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274 local value = self:get_option_set(name, ...); |
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275 local global_value = self:context("*"):get_option_set(name, ...); |
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276 if not value then |
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277 return global_value; |
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278 elseif not global_value then |
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279 return value; |
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280 end |
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281 value:include(global_value); |
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282 return value; |
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283 end |
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284 |
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285 function api:context(host) |
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286 return setmetatable({host=host or "*"}, {__index=self,__newindex=self}); |
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287 end |
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288 |
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289 function api:add_item(key, value) |
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290 self.items = self.items or {}; |
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291 self.items[key] = self.items[key] or {}; |
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292 t_insert(self.items[key], value); |
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293 self:fire_event("item-added/"..key, {source = self, item = value}); |
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294 end |
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295 function api:remove_item(key, value) |
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296 local t = self.items and self.items[key] or NULL; |
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297 for i = #t,1,-1 do |
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298 if t[i] == value then |
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299 t_remove(self.items[key], i); |
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300 self:fire_event("item-removed/"..key, {source = self, item = value}); |
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301 return value; |
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302 end |
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303 end |
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304 end |
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305 |
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306 function api:get_host_items(key) |
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307 local result = modulemanager.get_items(key, self.host) or {}; |
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308 return result; |
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309 end |
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310 |
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311 function api:handle_items(type, added_cb, removed_cb, existing) |
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312 self:hook("item-added/"..type, added_cb); |
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313 self:hook("item-removed/"..type, removed_cb); |
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314 if existing ~= false then |
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315 for _, item in ipairs(self:get_host_items(type)) do |
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316 added_cb({ item = item }); |
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317 end |
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318 end |
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319 end |
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320 |
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321 function api:provides(name, item) |
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322 -- if not item then item = setmetatable({}, { __index = function(t,k) return rawget(self.environment, k); end }); end |
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323 if not item then |
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324 item = {} |
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325 for k,v in pairs(self.environment) do |
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326 if k ~= "module" then item[k] = v; end |
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327 end |
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328 end |
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329 if not item.name then |
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330 local item_name = self.name; |
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331 -- Strip a provider prefix to find the item name |
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332 -- (e.g. "auth_foo" -> "foo" for an auth provider) |
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333 if item_name:find(name.."_", 1, true) == 1 then |
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334 item_name = item_name:sub(#name+2); |
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335 end |
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336 item.name = item_name; |
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337 end |
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338 item._provided_by = self.name; |
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339 self:add_item(name.."-provider", item); |
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340 end |
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341 |
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342 function api:send(stanza) |
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343 return core_post_stanza(hosts[self.host], stanza); |
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344 end |
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345 |
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346 function api:add_timer(delay, callback) |
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347 return timer.add_task(delay, function (t) |
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348 if self.loaded == false then return; end |
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349 return callback(t); |
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350 end); |
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351 end |
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352 |
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353 local path_sep = package.config:sub(1,1); |
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354 function api:get_directory() |
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355 return self.path and (self.path:gsub("%"..path_sep.."[^"..path_sep.."]*$", "")) or nil; |
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356 end |
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357 |
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358 function api:load_resource(path, mode) |
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359 path = config.resolve_relative_path(self:get_directory(), path); |
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360 return io.open(path, mode); |
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361 end |
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362 |
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363 function api:open_store(name, type) |
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364 return storagemanager.open(self.host, name or self.name, type); |
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365 end |
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366 |
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367 return api; |