Thu, 29 Jan 2009 02:13:30 +0000
configmanager: Add support for defining components
615 | 1 | -- Prosody IM v0.2 |
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2 | -- Copyright (C) 2008 Matthew Wild |
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3 | -- Copyright (C) 2008 Waqas Hussain |
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4 | -- |
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5 | -- This program is free software; you can redistribute it and/or |
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6 | -- modify it under the terms of the GNU General Public License |
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7 | -- as published by the Free Software Foundation; either version 2 |
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8 | -- of the License, or (at your option) any later version. |
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9 | -- |
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10 | -- This program is distributed in the hope that it will be useful, |
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11 | -- but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | -- GNU General Public License for more details. |
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14 | -- |
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15 | -- You should have received a copy of the GNU General Public License |
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16 | -- along with this program; if not, write to the Free Software |
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17 | -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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18 | -- |
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19 | |
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20 | |
0 | 21 | local format = string.format; |
22 | local setmetatable, type = setmetatable, type; | |
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23 | local pairs, ipairs = pairs, ipairs; |
0 | 24 | local char = string.char; |
25 | local loadfile, setfenv, pcall = loadfile, setfenv, pcall; | |
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26 | local log = require "util.logger".init("datamanager"); |
0 | 27 | local io_open = io.open; |
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28 | local os_remove = os.remove; |
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29 | local io_popen = io.popen; |
267 | 30 | local tostring, tonumber = tostring, tonumber; |
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31 | local error = error; |
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32 | local next = next; |
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33 | local t_insert = table.insert; |
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34 | local append = require "util.serialization".append; |
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35 | local path_separator = "/"; if os.getenv("WINDIR") then path_separator = "\\" end |
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36 | |
0 | 37 | module "datamanager" |
38 | ||
39 | ---- utils ----- | |
40 | local encode, decode; | |
41 | do | |
42 | local urlcodes = setmetatable({}, { __index = function (t, k) t[k] = char(tonumber("0x"..k)); return t[k]; end }); | |
43 | ||
44 | decode = function (s) | |
45 | return s and (s:gsub("+", " "):gsub("%%([a-fA-F0-9][a-fA-F0-9])", urlcodes)); | |
46 | end | |
47 | ||
48 | encode = function (s) | |
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49 | return s and (s:gsub("%W", function (c) return format("%%%02x", c:byte()); end)); |
0 | 50 | end |
51 | end | |
52 | ||
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53 | local _mkdir = {}; |
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54 | local function mkdir(path) |
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55 | path = path:gsub("/", path_separator); -- TODO as an optimization, do this during path creation rather than here |
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56 | if not _mkdir[path] then |
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57 | local x = io_popen("mkdir \""..path.."\" 2>&1"):read("*a"); |
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58 | _mkdir[path] = true; |
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59 | end |
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60 | return path; |
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61 | end |
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62 | |
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63 | local data_path = "data"; |
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64 | |
0 | 65 | ------- API ------------- |
66 | ||
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67 | function set_data_path(path) |
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68 | log("info", "Setting data path to: %s", path); |
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69 | data_path = path; |
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70 | end |
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71 | |
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72 | function getpath(username, host, datastore, ext, create) |
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73 | ext = ext or "dat"; |
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74 | host = host and encode(host); |
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75 | username = username and encode(username); |
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76 | if username then |
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77 | if create then mkdir(mkdir(mkdir(data_path).."/"..host).."/"..datastore); end |
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78 | return format("%s/%s/%s/%s.%s", data_path, host, datastore, username, ext); |
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79 | elseif host then |
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80 | if create then mkdir(mkdir(data_path).."/"..host); end |
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81 | return format("%s/%s/%s.%s", data_path, host, datastore, ext); |
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82 | else |
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83 | if create then mkdir(data_path); end |
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84 | return format("%s/%s.%s", data_path, datastore, ext); |
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85 | end |
0 | 86 | end |
87 | ||
88 | function load(username, host, datastore) | |
89 | local data, ret = loadfile(getpath(username, host, datastore)); | |
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90 | if not data then |
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91 | log("debug", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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92 | return nil; |
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93 | end |
0 | 94 | setfenv(data, {}); |
95 | local success, ret = pcall(data); | |
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96 | if not success then |
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97 | log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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98 | return nil; |
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99 | end |
0 | 100 | return ret; |
101 | end | |
102 | ||
103 | function store(username, host, datastore, data) | |
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104 | if not data then |
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105 | data = {}; |
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106 | end |
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107 | -- save the datastore |
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108 | local f, msg = io_open(getpath(username, host, datastore, nil, true), "w+"); |
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109 | if not f then |
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110 | log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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111 | return; |
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112 | end |
0 | 113 | f:write("return "); |
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114 | append(f, data); |
0 | 115 | f:close(); |
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116 | if not next(data) then -- try to delete empty datastore |
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117 | os_remove(getpath(username, host, datastore)); |
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118 | end |
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119 | -- we write data even when we are deleting because lua doesn't have a |
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120 | -- platform independent way of checking for non-exisitng files |
0 | 121 | return true; |
122 | end | |
123 | ||
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124 | function list_append(username, host, datastore, data) |
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125 | if not data then return; end |
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126 | -- save the datastore |
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127 | local f, msg = io_open(getpath(username, host, datastore, "list", true), "a+"); |
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128 | if not f then |
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129 | log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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130 | return; |
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131 | end |
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132 | f:write("item("); |
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133 | append(f, data); |
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134 | f:write(");\n"); |
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135 | f:close(); |
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136 | return true; |
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137 | end |
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138 | |
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139 | function list_store(username, host, datastore, data) |
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140 | if not data then |
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141 | data = {}; |
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142 | end |
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143 | -- save the datastore |
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144 | local f, msg = io_open(getpath(username, host, datastore, "list", true), "w+"); |
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145 | if not f then |
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146 | log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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147 | return; |
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148 | end |
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149 | for _, d in ipairs(data) do |
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150 | f:write("item("); |
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151 | append(f, d); |
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152 | f:write(");\n"); |
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153 | end |
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154 | f:close(); |
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155 | if not next(data) then -- try to delete empty datastore |
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156 | os_remove(getpath(username, host, datastore, "list")); |
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157 | end |
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158 | -- we write data even when we are deleting because lua doesn't have a |
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159 | -- platform independent way of checking for non-exisitng files |
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160 | return true; |
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161 | end |
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162 | |
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163 | function list_load(username, host, datastore) |
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164 | local data, ret = loadfile(getpath(username, host, datastore, "list")); |
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165 | if not data then |
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166 | log("debug", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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167 | return nil; |
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168 | end |
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169 | local items = {}; |
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170 | setfenv(data, {item = function(i) t_insert(items, i); end}); |
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171 | local success, ret = pcall(data); |
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172 | if not success then |
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173 | log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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174 | return nil; |
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175 | end |
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176 | return items; |
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177 | end |
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178 | |
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179 | return _M; |