Annotate

core/moduleapi.lua @ 6423:1c78f10f05d0

Merge 0.10->trunk
author Kim Alvefur <zash@zash.se>
date Tue, 23 Sep 2014 01:44:16 +0200
parent 6418:ae798314347c
parent 6422:6d4d87a89026
child 6557:8aa967c81cbc
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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; -- This gets set from modulemanager
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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 local resolve_relative_path = require"util.paths".resolve_relative_path;
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17
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18 local t_insert, t_remove, t_concat = table.insert, table.remove, table.concat;
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19 local error, setmetatable, type = error, setmetatable, type;
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20 local ipairs, pairs, select = ipairs, pairs, select;
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21 local tonumber, tostring = tonumber, tostring;
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22 local require = require;
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23 local pack = table.pack or function(...) return {n=select("#",...), ...}; end -- table.pack is only in 5.2
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24 local unpack = table.unpack or unpack; -- renamed in 5.2
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25
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26 local prosody = prosody;
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27 local hosts = prosody.hosts;
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28
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29 -- FIXME: This assert() is to try and catch an obscure bug (2013-04-05)
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30 local core_post_stanza = assert(prosody.core_post_stanza,
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31 "prosody.core_post_stanza is nil, please report this as a bug");
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32
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33 -- Registry of shared module data
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34 local shared_data = setmetatable({}, { __mode = "v" });
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35
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36 local NULL = {};
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37
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38 local api = {};
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39
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40 -- Returns the name of the current module
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41 function api:get_name()
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42 return self.name;
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43 end
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44
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45 -- Returns the host that the current module is serving
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46 function api:get_host()
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47 return self.host;
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48 end
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49
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50 function api:get_host_type()
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51 return (self.host == "*" and "global") or hosts[self.host].type or "local";
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52 end
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53
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54 function api:set_global()
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55 self.host = "*";
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56 -- Update the logger
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57 local _log = logger.init("mod_"..self.name);
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58 self.log = function (self, ...) return _log(...); end;
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59 self._log = _log;
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60 self.global = true;
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61 end
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62
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63 function api:add_feature(xmlns)
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64 self:add_item("feature", xmlns);
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65 end
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66 function api:add_identity(category, type, name)
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67 self:add_item("identity", {category = category, type = type, name = name});
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68 end
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69 function api:add_extension(data)
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70 self:add_item("extension", data);
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71 end
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72 function api:has_feature(xmlns)
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73 for _, feature in ipairs(self:get_host_items("feature")) do
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74 if feature == xmlns then return true; end
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75 end
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76 return false;
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77 end
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78 function api:has_identity(category, type, name)
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79 for _, id in ipairs(self:get_host_items("identity")) do
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80 if id.category == category and id.type == type and id.name == name then
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81 return true;
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82 end
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83 end
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84 return false;
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85 end
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86
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87 function api:fire_event(...)
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88 return (hosts[self.host] or prosody).events.fire_event(...);
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89 end
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90
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91 function api:hook_object_event(object, event, handler, priority)
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92 self.event_handlers:set(object, event, handler, true);
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93 return object.add_handler(event, handler, priority);
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94 end
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95
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96 function api:unhook_object_event(object, event, handler)
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97 return object.remove_handler(event, handler);
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98 end
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99
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100 function api:hook(event, handler, priority)
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101 return self:hook_object_event((hosts[self.host] or prosody).events, event, handler, priority);
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102 end
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103
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104 function api:hook_global(event, handler, priority)
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105 return self:hook_object_event(prosody.events, event, handler, priority);
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106 end
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107
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108 function api:hook_tag(xmlns, name, handler, priority)
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109 if not handler and type(name) == "function" then
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110 -- If only 2 options then they specified no xmlns
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111 xmlns, name, handler, priority = nil, xmlns, name, handler;
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112 elseif not (handler and name) then
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113 self:log("warn", "Error: Insufficient parameters to module:hook_stanza()");
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114 return;
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115 end
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116 return self:hook("stanza/"..(xmlns and (xmlns..":") or "")..name, function (data) return handler(data.origin, data.stanza, data); end, priority);
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117 end
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118 api.hook_stanza = api.hook_tag; -- COMPAT w/pre-0.9
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119
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120 function api:unhook(event, handler)
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121 return self:unhook_object_event((hosts[self.host] or prosody).events, event, handler);
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122 end
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123
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124 function api:require(lib)
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125 local f, n = pluginloader.load_code(self.name, lib..".lib.lua", self.environment);
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126 if not f then
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127 f, n = pluginloader.load_code(lib, lib..".lib.lua", self.environment);
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128 end
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129 if not f then error("Failed to load plugin library '"..lib.."', error: "..n); end -- FIXME better error message
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130 return f();
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131 end
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132
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133 function api:depends(name)
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134 if not self.dependencies then
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135 self.dependencies = {};
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136 self:hook("module-reloaded", function (event)
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137 if self.dependencies[event.module] and not self.reloading then
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138 self:log("info", "Auto-reloading due to reload of %s:%s", event.host, event.module);
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139 modulemanager.reload(self.host, self.name);
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140 return;
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141 end
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142 end);
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143 self:hook("module-unloaded", function (event)
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144 if self.dependencies[event.module] then
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145 self:log("info", "Auto-unloading due to unload of %s:%s", event.host, event.module);
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146 modulemanager.unload(self.host, self.name);
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147 end
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148 end);
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149 end
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150 local mod = modulemanager.get_module(self.host, name) or modulemanager.get_module("*", name);
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151 if mod and mod.module.host == "*" and self.host ~= "*"
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152 and modulemanager.module_has_method(mod, "add_host") then
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153 mod = nil; -- Target is a shared module, so we still want to load it on our host
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154 end
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155 if not mod then
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156 local err;
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157 mod, err = modulemanager.load(self.host, name);
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158 if not mod then
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159 return error(("Unable to load required module, mod_%s: %s"):format(name, ((err or "unknown error"):gsub("%-", " ")) ));
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160 end
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161 end
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162 self.dependencies[name] = true;
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163 return mod;
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164 end
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165
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166 -- Returns one or more shared tables at the specified virtual paths
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167 -- Intentionally does not allow the table at a path to be _set_, it
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168 -- is auto-created if it does not exist.
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169 function api:shared(...)
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170 if not self.shared_data then self.shared_data = {}; end
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171 local paths = { n = select("#", ...), ... };
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172 local data_array = {};
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173 local default_path_components = { self.host, self.name };
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174 for i = 1, paths.n do
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175 local path = paths[i];
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176 if path:sub(1,1) ~= "/" then -- Prepend default components
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177 local n_components = select(2, path:gsub("/", "%1"));
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178 path = (n_components<#default_path_components and "/" or "")..t_concat(default_path_components, "/", 1, #default_path_components-n_components).."/"..path;
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179 end
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180 local shared = shared_data[path];
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181 if not shared then
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182 shared = {};
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183 if path:match("%-cache$") then
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184 setmetatable(shared, { __mode = "kv" });
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185 end
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186 shared_data[path] = shared;
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187 end
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188 t_insert(data_array, shared);
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189 self.shared_data[path] = shared;
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190 end
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191 return unpack(data_array);
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192 end
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193
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194 function api:get_option(name, default_value)
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195 local value = config.get(self.host, name);
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196 if value == nil then
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197 value = default_value;
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198 end
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199 return value;
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200 end
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201
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202 function api:get_option_string(name, default_value)
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203 local value = self:get_option(name, default_value);
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204 if type(value) == "table" then
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205 if #value > 1 then
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206 self:log("error", "Config option '%s' does not take a list, using just the first item", name);
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207 end
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208 value = value[1];
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209 end
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210 if value == nil then
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211 return nil;
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212 end
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213 return tostring(value);
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214 end
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215
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216 function api:get_option_number(name, ...)
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217 local value = self:get_option(name, ...);
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218 if type(value) == "table" then
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219 if #value > 1 then
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220 self:log("error", "Config option '%s' does not take a list, using just the first item", name);
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221 end
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222 value = value[1];
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223 end
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224 local ret = tonumber(value);
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225 if value ~= nil and ret == nil then
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226 self:log("error", "Config option '%s' not understood, expecting a number", name);
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227 end
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228 return ret;
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229 end
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230
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231 function api:get_option_boolean(name, ...)
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232 local value = self:get_option(name, ...);
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233 if type(value) == "table" then
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234 if #value > 1 then
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235 self:log("error", "Config option '%s' does not take a list, using just the first item", name);
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236 end
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237 value = value[1];
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238 end
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239 if value == nil then
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240 return nil;
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241 end
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242 local ret = value == true or value == "true" or value == 1 or nil;
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243 if ret == nil then
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244 ret = (value == false or value == "false" or value == 0);
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245 if ret then
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246 ret = false;
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247 else
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248 ret = nil;
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249 end
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250 end
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251 if ret == nil then
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252 self:log("error", "Config option '%s' not understood, expecting true/false", name);
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253 end
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254 return ret;
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255 end
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256
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257 function api:get_option_array(name, ...)
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258 local value = self:get_option(name, ...);
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259
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260 if value == nil then
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261 return nil;
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262 end
5776
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263
4531
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264 if type(value) ~= "table" then
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265 return array{ value }; -- Assume any non-list is a single-item list
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266 end
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267
4531
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268 return array():append(value); -- Clone
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269 end
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270
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271 function api:get_option_set(name, ...)
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272 local value = self:get_option_array(name, ...);
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273
4531
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274 if value == nil then
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275 return nil;
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276 end
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277
4531
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278 return set.new(value);
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279 end
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280
5527
7e7f45f587a1 moduleapi: Add module:get_option_inherited_set() to return a set that inherits items from a globally set set, if set
Matthew Wild <mwild1@gmail.com>
parents: 5526
diff changeset
281 function api:get_option_inherited_set(name, ...)
7e7f45f587a1 moduleapi: Add module:get_option_inherited_set() to return a set that inherits items from a globally set set, if set
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parents: 5526
diff changeset
282 local value = self:get_option_set(name, ...);
7e7f45f587a1 moduleapi: Add module:get_option_inherited_set() to return a set that inherits items from a globally set set, if set
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parents: 5526
diff changeset
283 local global_value = self:context("*"):get_option_set(name, ...);
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parents: 5526
diff changeset
284 if not value then
7e7f45f587a1 moduleapi: Add module:get_option_inherited_set() to return a set that inherits items from a globally set set, if set
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parents: 5526
diff changeset
285 return global_value;
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parents: 5526
diff changeset
286 elseif not global_value then
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parents: 5526
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287 return value;
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parents: 5526
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288 end
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parents: 5526
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289 value:include(global_value);
7e7f45f587a1 moduleapi: Add module:get_option_inherited_set() to return a set that inherits items from a globally set set, if set
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parents: 5526
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290 return value;
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parents: 5526
diff changeset
291 end
7e7f45f587a1 moduleapi: Add module:get_option_inherited_set() to return a set that inherits items from a globally set set, if set
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292
5526
d54011a23b20 moduleapi: Add module:context(host) to produce a fake API context for a given host (or global). module:context("*"):get_option("foo") to get global options.
Matthew Wild <mwild1@gmail.com>
parents: 5498
diff changeset
293 function api:context(host)
d54011a23b20 moduleapi: Add module:context(host) to produce a fake API context for a given host (or global). module:context("*"):get_option("foo") to get global options.
Matthew Wild <mwild1@gmail.com>
parents: 5498
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294 return setmetatable({host=host or "*"}, {__index=self,__newindex=self});
d54011a23b20 moduleapi: Add module:context(host) to produce a fake API context for a given host (or global). module:context("*"):get_option("foo") to get global options.
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parents: 5498
diff changeset
295 end
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296
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297 function api:add_item(key, value)
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298 self.items = self.items or {};
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299 self.items[key] = self.items[key] or {};
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300 t_insert(self.items[key], value);
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301 self:fire_event("item-added/"..key, {source = self, item = value});
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302 end
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303 function api:remove_item(key, value)
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304 local t = self.items and self.items[key] or NULL;
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305 for i = #t,1,-1 do
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306 if t[i] == value then
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307 t_remove(self.items[key], i);
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308 self:fire_event("item-removed/"..key, {source = self, item = value});
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309 return value;
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diff changeset
310 end
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diff changeset
311 end
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parents:
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312 end
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parents:
diff changeset
313
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parents:
diff changeset
314 function api:get_host_items(key)
5412
a5fcda77c6b1 moduleapi: have get_host_items wrap on get_items from modulemanager, also add has_{feature/identity} to the API.
Marco Cirillo <maranda@lightwitch.org>
parents: 5377
diff changeset
315 local result = modulemanager.get_items(key, self.host) or {};
4531
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316 return result;
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317 end
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318
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diff changeset
319 function api:handle_items(type, added_cb, removed_cb, existing)
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diff changeset
320 self:hook("item-added/"..type, added_cb);
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321 self:hook("item-removed/"..type, removed_cb);
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322 if existing ~= false then
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diff changeset
323 for _, item in ipairs(self:get_host_items(type)) do
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diff changeset
324 added_cb({ item = item });
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325 end
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parents:
diff changeset
326 end
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parents:
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327 end
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parents:
diff changeset
328
4613
27fbc9c69eb5 moduleapi: Add module:provides(), a shortcut to add an item with the current module's name
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parents: 4605
diff changeset
329 function api:provides(name, item)
5529
af58eea131b4 moduleapi: module:provides called without an item makes a copy of the environment instead. Fixes warnings about non-existent globals
Kim Alvefur <zash@zash.se>
parents: 5527
diff changeset
330 -- if not item then item = setmetatable({}, { __index = function(t,k) return rawget(self.environment, k); end }); end
af58eea131b4 moduleapi: module:provides called without an item makes a copy of the environment instead. Fixes warnings about non-existent globals
Kim Alvefur <zash@zash.se>
parents: 5527
diff changeset
331 if not item then
af58eea131b4 moduleapi: module:provides called without an item makes a copy of the environment instead. Fixes warnings about non-existent globals
Kim Alvefur <zash@zash.se>
parents: 5527
diff changeset
332 item = {}
af58eea131b4 moduleapi: module:provides called without an item makes a copy of the environment instead. Fixes warnings about non-existent globals
Kim Alvefur <zash@zash.se>
parents: 5527
diff changeset
333 for k,v in pairs(self.environment) do
af58eea131b4 moduleapi: module:provides called without an item makes a copy of the environment instead. Fixes warnings about non-existent globals
Kim Alvefur <zash@zash.se>
parents: 5527
diff changeset
334 if k ~= "module" then item[k] = v; end
af58eea131b4 moduleapi: module:provides called without an item makes a copy of the environment instead. Fixes warnings about non-existent globals
Kim Alvefur <zash@zash.se>
parents: 5527
diff changeset
335 end
af58eea131b4 moduleapi: module:provides called without an item makes a copy of the environment instead. Fixes warnings about non-existent globals
Kim Alvefur <zash@zash.se>
parents: 5527
diff changeset
336 end
4613
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parents: 4605
diff changeset
337 if not item.name then
4660
96b40b5e8ea8 moduleapi: module:provides(): Fix usage of wrong table
Matthew Wild <mwild1@gmail.com>
parents: 4651
diff changeset
338 local item_name = self.name;
4613
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parents: 4605
diff changeset
339 -- Strip a provider prefix to find the item name
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parents: 4605
diff changeset
340 -- (e.g. "auth_foo" -> "foo" for an auth provider)
27fbc9c69eb5 moduleapi: Add module:provides(), a shortcut to add an item with the current module's name
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parents: 4605
diff changeset
341 if item_name:find(name.."_", 1, true) == 1 then
27fbc9c69eb5 moduleapi: Add module:provides(), a shortcut to add an item with the current module's name
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parents: 4605
diff changeset
342 item_name = item_name:sub(#name+2);
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parents: 4605
diff changeset
343 end
27fbc9c69eb5 moduleapi: Add module:provides(), a shortcut to add an item with the current module's name
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parents: 4605
diff changeset
344 item.name = item_name;
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parents: 4605
diff changeset
345 end
5530
d83482fc4a81 moduleapi: in module:provides(), add the name of the module in item._provided_by
Kim Alvefur <zash@zash.se>
parents: 5529
diff changeset
346 item._provided_by = self.name;
4661
76db5d0a2104 moduleapi: module:provides(): Add "-provider" onto the key name
Matthew Wild <mwild1@gmail.com>
parents: 4660
diff changeset
347 self:add_item(name.."-provider", item);
4613
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parents: 4605
diff changeset
348 end
27fbc9c69eb5 moduleapi: Add module:provides(), a shortcut to add an item with the current module's name
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parents: 4605
diff changeset
349
4614
20940729c1b4 moduleapi: Add module:send() as an alias for core_post_stanza() from the current host's origin
Matthew Wild <mwild1@gmail.com>
parents: 4613
diff changeset
350 function api:send(stanza)
20940729c1b4 moduleapi: Add module:send() as an alias for core_post_stanza() from the current host's origin
Matthew Wild <mwild1@gmail.com>
parents: 4613
diff changeset
351 return core_post_stanza(hosts[self.host], stanza);
20940729c1b4 moduleapi: Add module:send() as an alias for core_post_stanza() from the current host's origin
Matthew Wild <mwild1@gmail.com>
parents: 4613
diff changeset
352 end
20940729c1b4 moduleapi: Add module:send() as an alias for core_post_stanza() from the current host's origin
Matthew Wild <mwild1@gmail.com>
parents: 4613
diff changeset
353
5899
26f54b462601 core/moduleapi: Return timer object from module:add_timer
daurnimator <quae@daurnimator.com>
parents: 5825
diff changeset
354 local timer_methods = { }
26f54b462601 core/moduleapi: Return timer object from module:add_timer
daurnimator <quae@daurnimator.com>
parents: 5825
diff changeset
355 local timer_mt = {
26f54b462601 core/moduleapi: Return timer object from module:add_timer
daurnimator <quae@daurnimator.com>
parents: 5825
diff changeset
356 __index = timer_methods;
26f54b462601 core/moduleapi: Return timer object from module:add_timer
daurnimator <quae@daurnimator.com>
parents: 5825
diff changeset
357 }
26f54b462601 core/moduleapi: Return timer object from module:add_timer
daurnimator <quae@daurnimator.com>
parents: 5825
diff changeset
358 function timer_methods:stop( )
26f54b462601 core/moduleapi: Return timer object from module:add_timer
daurnimator <quae@daurnimator.com>
parents: 5825
diff changeset
359 timer.stop(self.id);
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360 end
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parents: 5825
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361 timer_methods.disarm = timer_methods.stop
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parents: 5825
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362 function timer_methods:reschedule(delay)
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parents: 5825
diff changeset
363 timer.reschedule(self.id, delay)
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daurnimator <quae@daurnimator.com>
parents: 5825
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364 end
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daurnimator <quae@daurnimator.com>
parents: 5825
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365
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parents: 5825
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366 local function timer_callback(now, id, t)
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parents: 5825
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367 if t.module_env.loaded == false then return; end
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parents: 5825
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368 return t.callback(now, unpack(t, 1, t.n));
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parents: 5825
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369 end
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parents: 5825
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370
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parents: 5825
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371 function api:add_timer(delay, callback, ...)
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parents: 5825
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372 local t = pack(...)
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373 t.module_env = self;
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parents: 5825
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374 t.callback = callback;
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parents: 5825
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375 t.id = timer.add_task(delay, timer_callback, t);
26f54b462601 core/moduleapi: Return timer object from module:add_timer
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parents: 5825
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376 return setmetatable(t, timer_mt);
4666
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
Matthew Wild <mwild1@gmail.com>
parents: 4663
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377 end
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
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parents: 4663
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378
4790
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
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parents: 4750
diff changeset
379 local path_sep = package.config:sub(1,1);
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
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parents: 4750
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380 function api:get_directory()
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381 return self.path and (self.path:gsub("%"..path_sep.."[^"..path_sep.."]*$", "")) or nil;
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
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parents: 4750
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382 end
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
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parents: 4750
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383
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
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parents: 4750
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384 function api:load_resource(path, mode)
6165
6a184b16b717 core.certmanager, core.moduleapi, mod_storage_sql, mod_storage_sql2: Import from util.paths
Kim Alvefur <zash@zash.se>
parents: 5825
diff changeset
385 path = resolve_relative_path(self:get_directory(), path);
4790
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
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parents: 4750
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386 return io.open(path, mode);
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
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parents: 4750
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387 end
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
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parents: 4750
diff changeset
388
5496
7a0b81b5ca71 moduleapi: Add module:open_store() as a front-end to storagemanager.open()
Matthew Wild <mwild1@gmail.com>
parents: 5434
diff changeset
389 function api:open_store(name, type)
6414
31c15004bfb0 core.moduleapi: Use require instead of global to get storagemanager in module:open_store()
Kim Alvefur <zash@zash.se>
parents: 6165
diff changeset
390 return require"core.storagemanager".open(self.host, name or self.name, type);
5496
7a0b81b5ca71 moduleapi: Add module:open_store() as a front-end to storagemanager.open()
Matthew Wild <mwild1@gmail.com>
parents: 5434
diff changeset
391 end
7a0b81b5ca71 moduleapi: Add module:open_store() as a front-end to storagemanager.open()
Matthew Wild <mwild1@gmail.com>
parents: 5434
diff changeset
392
6422
6d4d87a89026 core.module{manager,api}: Fix for 010b141e91ed (Thanks v1ct0r)
Kim Alvefur <zash@zash.se>
parents: 6415
diff changeset
393 function api.init(mm)
6415
010b141e91ed core.modulemanager, core.moduleapi: Hack around dependency loop
Kim Alvefur <zash@zash.se>
parents: 6414
diff changeset
394 modulemanager = mm;
010b141e91ed core.modulemanager, core.moduleapi: Hack around dependency loop
Kim Alvefur <zash@zash.se>
parents: 6414
diff changeset
395 return api;
010b141e91ed core.modulemanager, core.moduleapi: Hack around dependency loop
Kim Alvefur <zash@zash.se>
parents: 6414
diff changeset
396 end
6422
6d4d87a89026 core.module{manager,api}: Fix for 010b141e91ed (Thanks v1ct0r)
Kim Alvefur <zash@zash.se>
parents: 6415
diff changeset
397
6d4d87a89026 core.module{manager,api}: Fix for 010b141e91ed (Thanks v1ct0r)
Kim Alvefur <zash@zash.se>
parents: 6415
diff changeset
398 return api;