prosody
10a16fdebe2c
core/moduleapi.lua

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core/moduleapi.lua @ 5866:10a16fdebe2c

Merge 0.10->trunk
author Matthew Wild <mwild1@gmail.com>
date Thu, 10 Oct 2013 22:27:01 +0100
parent 5825:ac5e05ffc921
child 5899:26f54b462601
child 6165:6a184b16b717
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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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46 function api:get_host_type()
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47 return (self.host == "*" and "global") or hosts[self.host].type or "local";
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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:unhook(event, handler)
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117 return self:unhook_object_event((hosts[self.host] or prosody).events, event, handler);
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118 end
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119
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120 function api:require(lib)
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121 local f, n = pluginloader.load_code(self.name, lib..".lib.lua", self.environment);
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122 if not f then
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123 f, n = pluginloader.load_code(lib, lib..".lib.lua", self.environment);
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124 end
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125 if not f then error("Failed to load plugin library '"..lib.."', error: "..n); end -- FIXME better error message
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126 return f();
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127 end
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128
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129 function api:depends(name)
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130 if not self.dependencies then
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131 self.dependencies = {};
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132 self:hook("module-reloaded", function (event)
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133 if self.dependencies[event.module] and not self.reloading then
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134 self:log("info", "Auto-reloading due to reload of %s:%s", event.host, event.module);
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135 modulemanager.reload(self.host, self.name);
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136 return;
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137 end
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138 end);
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139 self:hook("module-unloaded", function (event)
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140 if self.dependencies[event.module] then
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141 self:log("info", "Auto-unloading due to unload of %s:%s", event.host, event.module);
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142 modulemanager.unload(self.host, self.name);
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143 end
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144 end);
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145 end
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146 local mod = modulemanager.get_module(self.host, name) or modulemanager.get_module("*", name);
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147 if mod and mod.module.host == "*" and self.host ~= "*"
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148 and modulemanager.module_has_method(mod, "add_host") then
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149 mod = nil; -- Target is a shared module, so we still want to load it on our host
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150 end
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151 if not mod then
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152 local err;
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153 mod, err = modulemanager.load(self.host, name);
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154 if not mod then
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155 return error(("Unable to load required module, mod_%s: %s"):format(name, ((err or "unknown error"):gsub("%-", " ")) ));
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156 end
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157 end
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158 self.dependencies[name] = true;
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159 return mod;
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160 end
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161
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162 -- Returns one or more shared tables at the specified virtual paths
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163 -- Intentionally does not allow the table at a path to be _set_, it
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164 -- is auto-created if it does not exist.
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165 function api:shared(...)
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166 if not self.shared_data then self.shared_data = {}; end
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167 local paths = { n = select("#", ...), ... };
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168 local data_array = {};
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169 local default_path_components = { self.host, self.name };
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170 for i = 1, paths.n do
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171 local path = paths[i];
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172 if path:sub(1,1) ~= "/" then -- Prepend default components
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173 local n_components = select(2, path:gsub("/", "%1"));
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174 path = (n_components<#default_path_components and "/" or "")..t_concat(default_path_components, "/", 1, #default_path_components-n_components).."/"..path;
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175 end
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176 local shared = shared_data[path];
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177 if not shared then
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178 shared = {};
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179 if path:match("%-cache$") then
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180 setmetatable(shared, { __mode = "kv" });
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181 end
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182 shared_data[path] = shared;
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183 end
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184 t_insert(data_array, shared);
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185 self.shared_data[path] = shared;
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186 end
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187 return unpack(data_array);
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188 end
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189
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190 function api:get_option(name, default_value)
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191 local value = config.get(self.host, name);
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192 if value == nil then
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193 value = default_value;
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194 end
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195 return value;
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196 end
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197
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198 function api:get_option_string(name, default_value)
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199 local value = self:get_option(name, default_value);
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200 if type(value) == "table" then
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201 if #value > 1 then
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202 self:log("error", "Config option '%s' does not take a list, using just the first item", name);
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203 end
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204 value = value[1];
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205 end
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206 if value == nil then
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207 return nil;
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208 end
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209 return tostring(value);
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210 end
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211
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212 function api:get_option_number(name, ...)
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213 local value = self:get_option(name, ...);
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214 if type(value) == "table" then
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215 if #value > 1 then
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216 self:log("error", "Config option '%s' does not take a list, using just the first item", name);
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217 end
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218 value = value[1];
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219 end
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220 local ret = tonumber(value);
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221 if value ~= nil and ret == nil then
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222 self:log("error", "Config option '%s' not understood, expecting a number", name);
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223 end
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224 return ret;
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225 end
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226
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227 function api:get_option_boolean(name, ...)
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228 local value = self:get_option(name, ...);
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229 if type(value) == "table" then
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230 if #value > 1 then
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231 self:log("error", "Config option '%s' does not take a list, using just the first item", name);
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232 end
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233 value = value[1];
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234 end
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235 if value == nil then
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236 return nil;
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237 end
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238 local ret = value == true or value == "true" or value == 1 or nil;
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239 if ret == nil then
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240 ret = (value == false or value == "false" or value == 0);
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241 if ret then
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242 ret = false;
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243 else
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244 ret = nil;
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245 end
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246 end
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247 if ret == nil then
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248 self:log("error", "Config option '%s' not understood, expecting true/false", name);
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249 end
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250 return ret;
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251 end
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252
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253 function api:get_option_array(name, ...)
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254 local value = self:get_option(name, ...);
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255
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256 if value == nil then
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257 return nil;
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258 end
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259
4531
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260 if type(value) ~= "table" then
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261 return array{ value }; -- Assume any non-list is a single-item list
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262 end
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263
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264 return array():append(value); -- Clone
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265 end
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266
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267 function api:get_option_set(name, ...)
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268 local value = self:get_option_array(name, ...);
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269
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270 if value == nil then
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271 return nil;
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272 end
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273
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274 return set.new(value);
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275 end
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276
5527
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parents: 5526
diff changeset
277 function api:get_option_inherited_set(name, ...)
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diff changeset
278 local value = self:get_option_set(name, ...);
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parents: 5526
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279 local global_value = self:context("*"):get_option_set(name, ...);
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parents: 5526
diff changeset
280 if not value then
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parents: 5526
diff changeset
281 return global_value;
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282 elseif not global_value then
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283 return value;
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284 end
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285 value:include(global_value);
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286 return value;
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parents: 5526
diff changeset
287 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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parents: 5526
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288
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
289 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
diff changeset
290 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
291 end
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292
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293 function api:add_item(key, value)
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294 self.items = self.items or {};
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295 self.items[key] = self.items[key] or {};
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296 t_insert(self.items[key], value);
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297 self:fire_event("item-added/"..key, {source = self, item = value});
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298 end
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299 function api:remove_item(key, value)
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300 local t = self.items and self.items[key] or NULL;
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301 for i = #t,1,-1 do
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302 if t[i] == value then
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303 t_remove(self.items[key], i);
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304 self:fire_event("item-removed/"..key, {source = self, item = value});
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305 return value;
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diff changeset
306 end
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diff changeset
307 end
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parents:
diff changeset
308 end
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parents:
diff changeset
309
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parents:
diff changeset
310 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
311 local result = modulemanager.get_items(key, self.host) or {};
4531
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312 return result;
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diff changeset
313 end
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diff changeset
314
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diff changeset
315 function api:handle_items(type, added_cb, removed_cb, existing)
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diff changeset
316 self:hook("item-added/"..type, added_cb);
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317 self:hook("item-removed/"..type, removed_cb);
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diff changeset
318 if existing ~= false then
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diff changeset
319 for _, item in ipairs(self:get_host_items(type)) do
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diff changeset
320 added_cb({ item = item });
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parents:
diff changeset
321 end
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parents:
diff changeset
322 end
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parents:
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323 end
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parents:
diff changeset
324
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
325 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
326 -- 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
327 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
328 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
329 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
330 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
331 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
332 end
4613
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parents: 4605
diff changeset
333 if not item.name then
4660
96b40b5e8ea8 moduleapi: module:provides(): Fix usage of wrong table
Matthew Wild <mwild1@gmail.com>
parents: 4651
diff changeset
334 local item_name = self.name;
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
335 -- Strip a provider prefix to find the item name
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
336 -- (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
337 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
338 item_name = item_name:sub(#name+2);
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parents: 4605
diff changeset
339 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
340 item.name = item_name;
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 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
342 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
343 self:add_item(name.."-provider", item);
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
344 end
27fbc9c69eb5 moduleapi: Add module:provides(), a shortcut to add an item with the current module's name
Matthew Wild <mwild1@gmail.com>
parents: 4605
diff changeset
345
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
346 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
347 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
348 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
349
4666
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
Matthew Wild <mwild1@gmail.com>
parents: 4663
diff changeset
350 function api:add_timer(delay, callback)
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
Matthew Wild <mwild1@gmail.com>
parents: 4663
diff changeset
351 return timer.add_task(delay, function (t)
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
Matthew Wild <mwild1@gmail.com>
parents: 4663
diff changeset
352 if self.loaded == false then return; end
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
Matthew Wild <mwild1@gmail.com>
parents: 4663
diff changeset
353 return callback(t);
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
Matthew Wild <mwild1@gmail.com>
parents: 4663
diff changeset
354 end);
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
Matthew Wild <mwild1@gmail.com>
parents: 4663
diff changeset
355 end
fb522fbd495e moduleapi: Add module:add_timer(delay, callback) - automatically halts the timer on module unload
Matthew Wild <mwild1@gmail.com>
parents: 4663
diff changeset
356
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
Matthew Wild <mwild1@gmail.com>
parents: 4750
diff changeset
357 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
Matthew Wild <mwild1@gmail.com>
parents: 4750
diff changeset
358 function api:get_directory()
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
Matthew Wild <mwild1@gmail.com>
parents: 4750
diff changeset
359 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
Matthew Wild <mwild1@gmail.com>
parents: 4750
diff changeset
360 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
Matthew Wild <mwild1@gmail.com>
parents: 4750
diff changeset
361
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
Matthew Wild <mwild1@gmail.com>
parents: 4750
diff changeset
362 function api:load_resource(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
Matthew Wild <mwild1@gmail.com>
parents: 4750
diff changeset
363 path = config.resolve_relative_path(self:get_directory(), path);
8bf710b19f65 moduleapi: Add module:get_directory() to get module file's directory, and module:load_resource() to load a file relative to that directory
Matthew Wild <mwild1@gmail.com>
parents: 4750
diff changeset
364 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
Matthew Wild <mwild1@gmail.com>
parents: 4750
diff changeset
365 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
Matthew Wild <mwild1@gmail.com>
parents: 4750
diff changeset
366
5496
7a0b81b5ca71 moduleapi: Add module:open_store() as a front-end to storagemanager.open()
Matthew Wild <mwild1@gmail.com>
parents: 5434
diff changeset
367 function api:open_store(name, type)
5498
2a67235e1d4d moduleapi: Make module:open_store() open a store named after the calling module by default
Kim Alvefur <zash@zash.se>
parents: 5496
diff changeset
368 return 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
369 end
7a0b81b5ca71 moduleapi: Add module:open_store() as a front-end to storagemanager.open()
Matthew Wild <mwild1@gmail.com>
parents: 5434
diff changeset
370
5053
375ab71e4b37 moduleapi: If path name ends with '-cache' create table as weak (keys and values)
Matthew Wild <mwild1@gmail.com>
parents: 5024
diff changeset
371 return api;