author | Matthew Wild <mwild1@gmail.com> |
Fri, 18 May 2012 23:53:02 +0100 | |
changeset 4893 | 98ff89ab5d1d |
parent 4854 | dab55c6f7710 |
child 4896 | 27cda15104f2 |
permissions | -rw-r--r-- |
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-- Prosody IM |
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-- Copyright (C) 2008-2012 Matthew Wild |
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-- Copyright (C) 2008-2012 Waqas Hussain |
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-- |
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-- This project is MIT/X11 licensed. Please see the |
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-- COPYING file in the source package for more information. |
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-- |
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local config = require "core.configmanager"; |
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local modulemanager = require "modulemanager"; |
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local array = require "util.array"; |
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local set = require "util.set"; |
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local logger = require "util.logger"; |
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local pluginloader = require "util.pluginloader"; |
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local timer = require "util.timer"; |
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local multitable_new = require "util.multitable".new; |
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local t_insert, t_remove, t_concat = table.insert, table.remove, table.concat; |
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local error, setmetatable, setfenv, type = error, setmetatable, setfenv, type; |
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local ipairs, pairs, select, unpack = ipairs, pairs, select, unpack; |
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local tonumber, tostring = tonumber, tostring; |
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local prosody = prosody; |
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local hosts = prosody.hosts; |
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local core_post_stanza = prosody.core_post_stanza; |
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-- Registry of shared module data |
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local shared_data = setmetatable({}, { __mode = "v" }); |
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local NULL = {}; |
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local api = {}; |
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-- Returns the name of the current module |
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function api:get_name() |
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return self.name; |
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end |
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-- Returns the host that the current module is serving |
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function api:get_host() |
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return self.host; |
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end |
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function api:get_host_type() |
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moduleapi: get_host_type(): Return nil for global modules (no host)
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return self.host ~= "*" and hosts[self.host].type or nil; |
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end |
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function api:set_global() |
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self.host = "*"; |
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-- Update the logger |
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local _log = logger.init("mod_"..self.name); |
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self.log = function (self, ...) return _log(...); end; |
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self._log = _log; |
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self.global = true; |
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end |
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function api:add_feature(xmlns) |
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self:add_item("feature", xmlns); |
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end |
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function api:add_identity(category, type, name) |
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self:add_item("identity", {category = category, type = type, name = name}); |
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end |
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function api:add_extension(data) |
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self:add_item("extension", data); |
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end |
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function api:fire_event(...) |
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return (hosts[self.host] or prosody).events.fire_event(...); |
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end |
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function api:hook_object_event(object, event, handler, priority) |
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local handlers = self.event_handlers[event]; |
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if not handlers then |
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handlers = {}; |
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self.event_handlers[event] = handlers; |
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end |
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handlers[event] = { handler = handler, priority = priority, object = object }; |
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return object.add_handler(event, handler, priority); |
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end |
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function api:unhook_object_event(object, event, handler) |
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return object.remove_handler(event, handler); |
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end |
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function api:hook(event, handler, priority) |
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return self:hook_object_event((hosts[self.host] or prosody).events, event, handler, priority); |
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end |
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function api:hook_global(event, handler, priority) |
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return self:hook_object_event(prosody.events, event, handler, priority); |
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end |
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function api:hook_tag(xmlns, name, handler, priority) |
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if not handler and type(name) == "function" then |
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-- If only 2 options then they specified no xmlns |
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xmlns, name, handler, priority = nil, xmlns, name, handler; |
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elseif not (handler and name) then |
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self:log("warn", "Error: Insufficient parameters to module:hook_stanza()"); |
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return; |
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101 |
end |
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102 |
return self:hook("stanza/"..(xmlns and (xmlns..":") or "")..name, function (data) return handler(data.origin, data.stanza, data); end, priority); |
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103 |
end |
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104 |
api.hook_stanza = api.hook_tag; -- COMPAT w/pre-0.9 |
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105 |
|
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106 |
function api:require(lib) |
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107 |
local f, n = pluginloader.load_code(self.name, lib..".lib.lua"); |
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108 |
if not f then |
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109 |
f, n = pluginloader.load_code(lib, lib..".lib.lua"); |
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110 |
end |
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111 |
if not f then error("Failed to load plugin library '"..lib.."', error: "..n); end -- FIXME better error message |
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112 |
setfenv(f, self.environment); |
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113 |
return f(); |
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114 |
end |
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115 |
|
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116 |
function api:depends(name) |
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117 |
if not self.dependencies then |
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118 |
self.dependencies = {}; |
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119 |
self:hook("module-reloaded", function (event) |
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120 |
if self.dependencies[event.module] and not self.reloading then |
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121 |
self:log("info", "Auto-reloading due to reload of %s:%s", event.host, event.module); |
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122 |
modulemanager.reload(self.host, self.name); |
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123 |
return; |
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124 |
end |
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125 |
end); |
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126 |
self:hook("module-unloaded", function (event) |
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127 |
if self.dependencies[event.module] then |
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128 |
self:log("info", "Auto-unloading due to unload of %s:%s", event.host, event.module); |
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129 |
modulemanager.unload(self.host, self.name); |
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130 |
end |
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131 |
end); |
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132 |
end |
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133 |
local mod = modulemanager.get_module(self.host, name) or modulemanager.get_module("*", name); |
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134 |
if mod and mod.module.host == "*" and self.host ~= "*" |
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135 |
and modulemanager.module_has_method(mod, "add_host") then |
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136 |
mod = nil; -- This is a shared module, so we still want to load it on our host |
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137 |
end |
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138 |
if not mod then |
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139 |
local err; |
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140 |
mod, err = modulemanager.load(self.host, name); |
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141 |
if not mod then |
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142 |
return error(("Unable to load required module, mod_%s: %s"):format(name, ((err or "unknown error"):gsub("%-", " ")) )); |
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143 |
end |
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144 |
end |
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145 |
self.dependencies[name] = true; |
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146 |
return mod; |
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147 |
end |
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148 |
|
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149 |
-- Returns one or more shared tables at the specified virtual paths |
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150 |
-- Intentionally does not allow the table at a path to be _set_, it |
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151 |
-- is auto-created if it does not exist. |
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152 |
function api:shared(...) |
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153 |
if not self.shared_data then self.shared_data = {}; end |
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154 |
local paths = { n = select("#", ...), ... }; |
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155 |
local data_array = {}; |
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156 |
local default_path_components = { self.host, self.name }; |
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157 |
for i = 1, paths.n do |
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158 |
local path = paths[i]; |
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159 |
if path:sub(1,1) ~= "/" then -- Prepend default components |
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160 |
local n_components = select(2, path:gsub("/", "%1")); |
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161 |
path = (n_components<#default_path_components and "/" or "")..t_concat(default_path_components, "/", 1, #default_path_components-n_components).."/"..path; |
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162 |
end |
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163 |
local shared = shared_data[path]; |
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164 |
if not shared then |
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165 |
shared = {}; |
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166 |
shared_data[path] = shared; |
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167 |
end |
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168 |
t_insert(data_array, shared); |
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169 |
self.shared_data[path] = shared; |
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170 |
end |
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171 |
return unpack(data_array); |
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172 |
end |
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|
173 |
|
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174 |
function api:get_option(name, default_value) |
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175 |
local value = config.get(self.host, self.name, name); |
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176 |
if value == nil then |
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177 |
value = config.get(self.host, "core", name); |
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178 |
if value == nil then |
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179 |
value = default_value; |
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180 |
end |
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181 |
end |
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182 |
return value; |
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183 |
end |
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184 |
|
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185 |
function api:get_option_string(name, default_value) |
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186 |
local value = self:get_option(name, default_value); |
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187 |
if type(value) == "table" then |
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188 |
if #value > 1 then |
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189 |
self:log("error", "Config option '%s' does not take a list, using just the first item", name); |
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190 |
end |
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191 |
value = value[1]; |
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192 |
end |
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193 |
if value == nil then |
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194 |
return nil; |
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195 |
end |
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196 |
return tostring(value); |
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197 |
end |
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198 |
|
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199 |
function api:get_option_number(name, ...) |
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200 |
local value = self:get_option(name, ...); |
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201 |
if type(value) == "table" then |
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202 |
if #value > 1 then |
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203 |
self:log("error", "Config option '%s' does not take a list, using just the first item", name); |
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end |
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value = value[1]; |
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end |
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207 |
local ret = tonumber(value); |
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if value ~= nil and ret == nil then |
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self:log("error", "Config option '%s' not understood, expecting a number", name); |
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210 |
end |
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211 |
return ret; |
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212 |
end |
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213 |
|
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function api:get_option_boolean(name, ...) |
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local value = self:get_option(name, ...); |
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if type(value) == "table" then |
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if #value > 1 then |
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self:log("error", "Config option '%s' does not take a list, using just the first item", name); |
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219 |
end |
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value = value[1]; |
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221 |
end |
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if value == nil then |
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return nil; |
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224 |
end |
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local ret = value == true or value == "true" or value == 1 or nil; |
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if ret == nil then |
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ret = (value == false or value == "false" or value == 0); |
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if ret then |
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ret = false; |
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else |
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231 |
ret = nil; |
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232 |
end |
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233 |
end |
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if ret == nil then |
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self:log("error", "Config option '%s' not understood, expecting true/false", name); |
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236 |
end |
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237 |
return ret; |
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238 |
end |
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239 |
|
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240 |
function api:get_option_array(name, ...) |
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local value = self:get_option(name, ...); |
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242 |
|
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243 |
if value == nil then |
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244 |
return nil; |
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245 |
end |
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246 |
|
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if type(value) ~= "table" then |
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return array{ value }; -- Assume any non-list is a single-item list |
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249 |
end |
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250 |
|
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251 |
return array():append(value); -- Clone |
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252 |
end |
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253 |
|
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254 |
function api:get_option_set(name, ...) |
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local value = self:get_option_array(name, ...); |
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256 |
|
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257 |
if value == nil then |
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258 |
return nil; |
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259 |
end |
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260 |
|
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261 |
return set.new(value); |
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262 |
end |
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263 |
|
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264 |
function api:add_item(key, value) |
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265 |
self.items = self.items or {}; |
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266 |
self.items[key] = self.items[key] or {}; |
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267 |
t_insert(self.items[key], value); |
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self:fire_event("item-added/"..key, {source = self, item = value}); |
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269 |
end |
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270 |
function api:remove_item(key, value) |
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local t = self.items and self.items[key] or NULL; |
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272 |
for i = #t,1,-1 do |
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273 |
if t[i] == value then |
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t_remove(self.items[key], i); |
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self:fire_event("item-removed/"..key, {source = self, item = value}); |
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276 |
return value; |
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277 |
end |
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278 |
end |
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279 |
end |
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280 |
|
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281 |
function api:get_host_items(key) |
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282 |
local result = {}; |
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283 |
for mod_name, module in pairs(modulemanager.get_modules(self.host)) do |
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284 |
module = module.module; |
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285 |
if module.items then |
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286 |
for _, item in ipairs(module.items[key] or NULL) do |
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287 |
t_insert(result, item); |
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288 |
end |
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289 |
end |
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290 |
end |
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291 |
for mod_name, module in pairs(modulemanager.get_modules("*")) do |
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292 |
module = module.module; |
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293 |
if module.items then |
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for _, item in ipairs(module.items[key] or NULL) do |
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295 |
t_insert(result, item); |
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296 |
end |
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297 |
end |
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298 |
end |
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299 |
return result; |
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300 |
end |
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301 |
|
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302 |
function api:handle_items(type, added_cb, removed_cb, existing) |
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303 |
self:hook("item-added/"..type, added_cb); |
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self:hook("item-removed/"..type, removed_cb); |
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305 |
if existing ~= false then |
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306 |
for _, item in ipairs(self:get_host_items(type)) do |
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307 |
added_cb({ item = item }); |
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308 |
end |
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309 |
end |
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310 |
end |
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311 |
|
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function api:provides(name, item) |
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if not item then item = self.environment; end |
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if not item.name then |
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local item_name = self.name; |
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-- Strip a provider prefix to find the item name |
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-- (e.g. "auth_foo" -> "foo" for an auth provider) |
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if item_name:find(name.."_", 1, true) == 1 then |
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item_name = item_name:sub(#name+2); |
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320 |
end |
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item.name = item_name; |
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parents:
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322 |
end |
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moduleapi: module:provides(): Add "-provider" onto the key name
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self:add_item(name.."-provider", item); |
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324 |
end |
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325 |
|
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moduleapi: Add module:send() as an alias for core_post_stanza() from the current host's origin
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function api:send(stanza) |
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return core_post_stanza(hosts[self.host], stanza); |
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328 |
end |
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329 |
|
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330 |
function api:add_timer(delay, callback) |
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return timer.add_task(delay, function (t) |
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if self.loaded == false then return; end |
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return callback(t); |
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334 |
end); |
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335 |
end |
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336 |
|
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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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local path_sep = package.config:sub(1,1); |
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function api:get_directory() |
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return self.path and (self.path:gsub("%"..path_sep.."[^"..path_sep.."]*$", "")) or nil; |
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340 |
end |
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341 |
|
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342 |
function api:load_resource(path, mode) |
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343 |
path = config.resolve_relative_path(self:get_directory(), path); |
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344 |
return io.open(path, mode); |
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345 |
end |
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346 |
|
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modulemanager: Move in-module API functions to core.moduleapi (half the file size, yay)
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347 |
return api; |