plugins/mod_storage_xep0227.lua

   1
   2 local ipairs, pairs = ipairs, pairs;
   3 local setmetatable = setmetatable;
   4 local tostring = tostring;
   5 local next = next;
   6 local t_remove = table.remove;
   7 local os_remove = os.remove;
   8 local io_open = io.open;
   9
  10 local paths = require"util.paths";
  11 local st = require "util.stanza";
  12 local parse_xml_real = require "util.xml".parse;
  13
  14 local function getXml(user, host)
  15         local jid = user.."@"..host;
  16         local path = paths.join(prosody.paths.data, jid..".xml");
  17         local f = io_open(path);
  18         if not f then return; end
  19         local s = f:read("*a");
  20         return parse_xml_real(s);
  21 end
  22 local function setXml(user, host, xml)
  23         local jid = user.."@"..host;
  24         local path = paths.join(prosody.paths.data, jid..".xml");
  25         if xml then
  26                 local f = io_open(path, "w");
  27                 if not f then return; end
  28                 local s = tostring(xml);
  29                 f:write(s);
  30                 f:close();
  31                 return true;
  32         else
  33                 return os_remove(path);
  34         end
  35 end
  36 local function getUserElement(xml)
  37         if xml and xml.name == "server-data" then
  38                 local host = xml.tags[1];
  39                 if host and host.name == "host" then
  40                         local user = host.tags[1];
  41                         if user and user.name == "user" then
  42                                 return user;
  43                         end
  44                 end
  45         end
  46 end
  47 local function createOuterXml(user, host)
  48         return st.stanza("server-data", {xmlns='http://www.xmpp.org/extensions/xep-0227.html#ns'})
  49                 :tag("host", {jid=host})
  50                         :tag("user", {name = user});
  51 end
  52 local function removeFromArray(array, value)
  53         for i,item in ipairs(array) do
  54                 if item == value then
  55                         t_remove(array, i);
  56                         return;
  57                 end
  58         end
  59 end
  60 local function removeStanzaChild(s, child)
  61         removeFromArray(s.tags, child);
  62         removeFromArray(s, child);
  63 end
  64
  65 local handlers = {};
  66
  67 handlers.accounts = {
  68         get = function(self, user)
  69                 local user = getUserElement(getXml(user, self.host));
  70                 if user and user.attr.password then
  71                         return { password = user.attr.password };
  72                 end
  73         end;
  74         set = function(self, user, data)
  75                 if data and data.password then
  76                         local xml = getXml(user, self.host);
  77                         if not xml then xml = createOuterXml(user, self.host); end
  78                         local usere = getUserElement(xml);
  79                         usere.attr.password = data.password;
  80                         return setXml(user, self.host, xml);
  81                 else
  82                         return setXml(user, self.host, nil);
  83                 end
  84         end;
  85 };
  86 handlers.vcard = {
  87         get = function(self, user)
  88                 local user = getUserElement(getXml(user, self.host));
  89                 if user then
  90                         local vcard = user:get_child("vCard", 'vcard-temp');
  91                         if vcard then
  92                                 return st.preserialize(vcard);
  93                         end
  94                 end
  95         end;
  96         set = function(self, user, data)
  97                 local xml = getXml(user, self.host);
  98                 local usere = xml and getUserElement(xml);
  99                 if usere then
 100                         local vcard = usere:get_child("vCard", 'vcard-temp');
 101                         if vcard then
 102                                 removeStanzaChild(usere, vcard);
 103                         elseif not data then
 104                                 return true;
 105                         end
 106                         if data then
 107                                 vcard = st.deserialize(data);
 108                                 usere:add_child(vcard);
 109                         end
 110                         return setXml(user, self.host, xml);
 111                 end
 112                 return true;
 113         end;
 114 };
 115 handlers.private = {
 116         get = function(self, user)
 117                 local user = getUserElement(getXml(user, self.host));
 118                 if user then
 119                         local private = user:get_child("query", "jabber:iq:private");
 120                         if private then
 121                                 local r = {};
 122                                 for _, tag in ipairs(private.tags) do
 123                                         r[tag.name..":"..tag.attr.xmlns] = st.preserialize(tag);
 124                                 end
 125                                 return r;
 126                         end
 127                 end
 128         end;
 129         set = function(self, user, data)
 130                 local xml = getXml(user, self.host);
 131                 local usere = xml and getUserElement(xml);
 132                 if usere then
 133                         local private = usere:get_child("query", 'jabber:iq:private');
 134                         if private then removeStanzaChild(usere, private); end
 135                         if data and next(data) ~= nil then
 136                                 private = st.stanza("query", {xmlns='jabber:iq:private'});
 137                                 for _,tag in pairs(data) do
 138                                         private:add_child(st.deserialize(tag));
 139                                 end
 140                                 usere:add_child(private);
 141                         end
 142                         return setXml(user, self.host, xml);
 143                 end
 144                 return true;
 145         end;
 146 };
 147
 148 -----------------------------
 149 local driver = {};
 150
 151 function driver:open(host, datastore, typ)
 152         local instance = setmetatable({}, self);
 153         instance.host = host;
 154         instance.datastore = datastore;
 155         local handler = handlers[datastore];
 156         if not handler then return nil; end
 157         for key,val in pairs(handler) do
 158                 instance[key] = val;
 159         end
 160         if instance.init then instance:init(); end
 161         return instance;
 162 end
 163
 164 module:provides("storage", driver);