prosody
2a67235e1d4d
core/moduleapi.lua

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core/moduleapi.lua @ 5498:2a67235e1d4d

moduleapi: Make module:open_store() open a store named after the calling module by default
author Kim Alvefur <zash@zash.se>
date Fri, 19 Apr 2013 14:42:32 +0200
parent 5496:7a0b81b5ca71
child 5526:d54011a23b20
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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:add_item(key, value)
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274 self.items = self.items or {};
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275 self.items[key] = self.items[key] or {};
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276 t_insert(self.items[key], value);
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277 self:fire_event("item-added/"..key, {source = self, item = value});
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278 end
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279 function api:remove_item(key, value)
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280 local t = self.items and self.items[key] or NULL;
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281 for i = #t,1,-1 do
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282 if t[i] == value then
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283 t_remove(self.items[key], i);
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284 self:fire_event("item-removed/"..key, {source = self, item = value});
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285 return value;
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286 end
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287 end
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288 end
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289
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diff changeset
290 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
291 local result = modulemanager.get_items(key, self.host) or {};
4531
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292 return result;
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293 end
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294
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diff changeset
295 function api:handle_items(type, added_cb, removed_cb, existing)
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296 self:hook("item-added/"..type, added_cb);
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297 self:hook("item-removed/"..type, removed_cb);
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298 if existing ~= false then
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diff changeset
299 for _, item in ipairs(self:get_host_items(type)) do
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300 added_cb({ item = item });
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301 end
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302 end
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303 end
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304
4613
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
305 function api:provides(name, item)
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
306 if not item then item = self.environment; 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
307 if not item.name then
4660
96b40b5e8ea8 moduleapi: module:provides(): Fix usage of wrong table
Matthew Wild <mwild1@gmail.com>
parents: 4651
diff changeset
308 local item_name = self.name;
4613
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parents: 4605
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309 -- Strip a provider prefix to find the item name
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Matthew Wild <mwild1@gmail.com>
parents: 4605
diff changeset
310 -- (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
311 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
Matthew Wild <mwild1@gmail.com>
parents: 4605
diff changeset
312 item_name = item_name:sub(#name+2);
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parents: 4605
diff changeset
313 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
314 item.name = item_name;
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
315 end
4661
76db5d0a2104 moduleapi: module:provides(): Add "-provider" onto the key name
Matthew Wild <mwild1@gmail.com>
parents: 4660
diff changeset
316 self:add_item(name.."-provider", item);
4613
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Matthew Wild <mwild1@gmail.com>
parents: 4605
diff changeset
317 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
318
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
319 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
320 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
321 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
322
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
323 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
324 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
325 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
326 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
327 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
328 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
329
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
330 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
331 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
332 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
333 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
334
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
335 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
336 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
337 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
338 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
339
5496
7a0b81b5ca71 moduleapi: Add module:open_store() as a front-end to storagemanager.open()
Matthew Wild <mwild1@gmail.com>
parents: 5434
diff changeset
340 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
341 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
342 end
7a0b81b5ca71 moduleapi: Add module:open_store() as a front-end to storagemanager.open()
Matthew Wild <mwild1@gmail.com>
parents: 5434
diff changeset
343
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
344 return api;