storage/mod_xep0227: Initial commit.

1 files changed, 163 insertions, 0 deletions

diff --git a/plugins/storage/mod_xep0227.lua b/plugins/storage/mod_xep0227.lua
new file mode 100644
index 00000000..b6d2e627
--- /dev/null
+++ b/plugins/storage/mod_xep0227.lua
@@ -0,0 +1,163 @@
+
+local ipairs, pairs = ipairs, pairs;
+local setmetatable = setmetatable;
+local tostring = tostring;
+local next = next;
+local t_remove = table.remove;
+local os_remove = os.remove;
+local io_open = io.open;
+
+local st = require "util.stanza";
+local parse_xml_real = module:require("xmlparse");
+
+local function getXml(user, host)
+	local jid = user.."@"..host;
+	local path = "data/"..jid..".xml";
+	local f = io_open(path);
+	if not f then return; end
+	local s = f:read("*a");
+	return parse_xml_real(s);
+end
+local function setXml(user, host, xml)
+	local jid = user.."@"..host;
+	local path = "data/"..jid..".xml";
+	if xml then
+		local f = io_open(path, "w");
+		if not f then return; end
+		local s = tostring(xml);
+		f:write(s);
+		f:close();
+		return true;
+	else
+		return os_remove(path);
+	end
+end
+local function getUserElement(xml)
+	if xml and xml.name == "server-data" then
+		local host = xml.tags[1];
+		if host and host.name == "host" then
+			local user = host.tags[1];
+			if user and user.name == "user" then
+				return user;
+			end
+		end
+	end
+end
+local function createOuterXml(user, host)
+	return st.stanza("server-data", {xmlns='http://www.xmpp.org/extensions/xep-0227.html#ns'})
+		:tag("host", {jid=host})
+			:tag("user", {name = user});
+end
+local function removeFromArray(array, value)
+	for i,item in ipairs(array) do
+		if item == value then
+			t_remove(array, i);
+			return;
+		end
+	end
+end
+local function removeStanzaChild(s, child)
+	removeFromArray(s.tags, child);
+	removeFromArray(s, child);
+end
+
+local handlers = {};
+
+handlers.accounts = {
+	get = function(self, user)
+		local user = getUserElement(getXml(user, self.host));
+		if user and user.attr.password then
+			return { password = user.attr.password };
+		end
+	end;
+	set = function(self, user, data)
+		if data and data.password then
+			local xml = getXml(user, self.host);
+			if not xml then xml = createOuterXml(user, self.host); end
+			local usere = getUserElement(xml);
+			usere.attr.password = data.password;
+			return setXml(user, self.host, xml);
+		else
+			return setXml(user, self.host, nil);
+		end
+	end;
+};
+handlers.vcard = {
+	get = function(self, user)
+		local user = getUserElement(getXml(user, self.host));
+		if user then
+			local vcard = user:get_child("vCard", 'vcard-temp');
+			if vcard then
+				return st.preserialize(vcard);
+			end
+		end
+	end;
+	set = function(self, user, data)
+		local xml = getXml(user, self.host);
+		local usere = xml and getUserElement(xml);
+		if usere then
+			local vcard = usere:get_child("vCard", 'vcard-temp');
+			if vcard then
+				removeStanzaChild(usere, vcard);
+			elseif not data then
+				return true;
+			end
+			if data then
+				vcard = st.deserialize(data);
+				usere:add_child(vcard);
+			end
+			return setXml(user, self.host, xml);
+		end
+		return true;
+	end;
+};
+handlers.private = {
+	get = function(self, user)
+		local user = getUserElement(getXml(user, self.host));
+		if user then
+			local private = user:get_child("query", "jabber:iq:private");
+			if private then
+				local r = {};
+				for _, tag in ipairs(private.tags) do
+					r[tag.name..":"..tag.attr.xmlns] = st.preserialize(tag);
+				end
+				return r;
+			end
+		end
+	end;
+	set = function(self, user, data)
+		local xml = getXml(user, self.host);
+		local usere = xml and getUserElement(xml);
+		if usere then
+			local private = usere:get_child("query", 'jabber:iq:private');
+			if private then removeStanzaChild(usere, private); end
+			if data and next(data) ~= nil then
+				private = st.stanza("query", {xmlns='jabber:iq:private'});
+				for _,tag in pairs(data) do
+					private:add_child(st.deserialize(tag));
+				end
+				usere:add_child(private);
+			end
+			return setXml(user, self.host, xml);
+		end
+		return true;
+	end;
+};
+
+-----------------------------
+local driver = {};
+
+function driver:open(host, datastore, typ)
+	local instance = setmetatable({}, self);
+	instance.host = host;
+	instance.datastore = datastore;
+	local handler = handlers[datastore];
+	if not handler then return nil; end
+	for key,val in pairs(handler) do
+		instance[key] = val;
+	end
+	if instance.init then instance:init(); end
+	return instance;
+end
+
+module:add_item("data-driver", driver);