storage/mod_ejabberd (and associated library): Initial commit.

1 files changed, 231 insertions, 0 deletions

diff --git a/plugins/storage/mod_ejabberd.lua b/plugins/storage/mod_ejabberd.lua
new file mode 100644
index 00000000..92caecbc
--- /dev/null
+++ b/plugins/storage/mod_ejabberd.lua
@@ -0,0 +1,231 @@
+
+local setmetatable = setmetatable;
+local error = error;
+local unpack = unpack;
+local module = module;
+local tostring = tostring;
+local pairs, next = pairs, next;
+local prosody = prosody;
+local assert = assert;
+local require = require;
+
+-- connect to db
+local DBI = require "DBI";
+local option_datastore_params = module:get_option("datastore_params") or error("Missing option: datastore_params");
+local database;
+do
+	local driver, db = unpack(option_datastore_params);
+	module:log("debug", "Opening database: %s", "dbi:"..driver..":"..db);
+	prosody.unlock_globals();
+	local dbh, err = DBI.Connect(unpack(option_datastore_params));
+	prosody.lock_globals();
+	assert(dbh, err);
+	dbh:autocommit(true)
+	database = dbh;
+end
+
+-- initialize db
+local ejabberd_init = module:require("ejabberd_init");
+ejabberd_init.init(database);
+
+local st = require "util.stanza";
+local _parse_xml = module:require("xmlparse");
+local parse_xml_real = _parse_xml;
+local function parse_xml(str)
+	local s = _parse_xml(str);
+	if s and not s.gsub then
+		return st.preserialize(s);
+	end
+end
+local function unparse_xml(s)
+	return tostring(st.deserialize(s));
+end
+
+
+local handlers = {};
+
+handlers.accounts = {
+	get = function(self, user)
+		local select = self:query("select password from users where username=? and host=?", user, self.host);
+		local row = select and select:fetch();
+		if row then return { password = row[1] }; end
+	end;
+	set = function(self, user, data)
+		if data and data.password then
+			return self:modify("update users set password=? where username=? and host=?", data.password, user, self.host)
+				or self:modify("insert into users (username, host, password) values (?, ?, ?)", user, self.host, data.password);
+		else
+			return self:modify("delete from users where username=? and host=?", user, self.host);
+		end
+	end;
+};
+handlers.vcard = {
+	get = function(self, user)
+		local select = self:query("select vcard from vcard where username=? and host=?", user, self.host);
+		local row = select and select:fetch();
+		if row then return parse_xml(row[1]); end
+	end;
+	set = function(self, user, data)
+		if data then
+			data = unparse_xml(data);
+			return self:modify("update vcard set vcard=? where username=? and host=?", data, user, self.host)
+				or self:modify("insert into vcard (username, host, vcard) values (?, ?, ?)", user, self.host, data);
+		else
+			return self:modify("delete from vcard where username=? and host=?", user, self.host);
+		end
+	end;
+};
+handlers.private = {
+	get = function(self, user)
+		local select = self:query("select namespace,data from private_storage where username=? and host=?", user, self.host);
+		if select then
+			local data = {};
+			for row in select:rows() do
+				data[row[1]] = parse_xml(row[2]);
+			end
+			return data;
+		end
+	end;
+	set = function(self, user, data)
+		if data then
+			self:modify("delete from private_storage where username=? and host=?", user, self.host);
+			for namespace,text in pairs(data) do
+				self:modify("insert into private_storage (username, host, namespace, data) values (?, ?, ?, ?)", user, self.host, namespace, unparse_xml(text));
+			end
+			return true;
+		else
+			return self:modify("delete from private_storage where username=? and host=?", user, self.host);
+		end
+	end;
+	-- TODO map_set, map_get
+};
+local subscription_map = { N = "none", B = "both", F = "from", T = "to" };
+local subscription_map_reverse = { none = "N", both = "B", from = "F", to = "T" };
+handlers.roster = {
+	get = function(self, user)
+		local select = self:query("select jid,nick,subscription,ask,server,subscribe,type from rosterusers where username=?", user);
+		if select then
+			local roster = { pending = {} };
+			for row in select:rows() do
+				local jid,nick,subscription,ask,server,subscribe,typ = unpack(row);
+				local item = { groups = {} };
+				if nick == "" then nick = nil; end
+				item.nick = nick;
+				item.subscription = subscription_map[subscription];
+				if ask == "N" then ask = nil;
+				elseif ask == "O" then ask = "subscribe"
+				elseif ask == "I" then roster.pending[jid] = true; ask = nil;
+				elseif ask == "B" then roster.pending[jid] = true; ask = "subscribe";
+				else module:log("debug", "bad roster_item.ask: %s", ask); ask = nil; end
+				item.ask = ask;
+				roster[jid] = item;
+			end
+			
+			select = self:query("select jid,grp from rostergroups where username=?", user);
+			if select then
+				for row in select:rows() do
+					local jid,grp = unpack(row);
+					if roster[jid] then roster[jid].groups[grp] = true; end
+				end
+			end
+			select = self:query("select version from roster_version where username=?", user);
+			local row = select and select:fetch();
+			if row then
+				roster[false] = { version = row[1]; };
+			end
+			return roster;
+		end
+	end;
+	set = function(self, user, data)
+		if data and next(data) ~= nil then
+			self:modify("delete from rosterusers where username=?", user);
+			self:modify("delete from rostergroups where username=?", user);
+			self:modify("delete from roster_version where username=?", user);
+			local done = {};
+			local pending = data.pending or {};
+			for jid,item in pairs(data) do
+				if jid and jid ~= "pending" then
+					local subscription = subscription_map_reverse[item.subscription];
+					local ask;
+					if pending[jid] then
+						if item.ask then ask = "B"; else ask = "I"; end
+					else
+						if item.ask then ask = "O"; else ask = "N"; end
+					end
+					local r = self:modify("insert into rosterusers (username,jid,nick,subscription,ask,askmessage,server,subscribe) values (?, ?, ?, ?, ?, '', '', '')", user, jid, item.nick or "", subscription, ask);
+					if not r then module:log("debug", "--- :( %s", tostring(r)); end
+					done[jid] = true;
+					for group in pairs(item.groups) do
+						self:modify("insert into rostergroups (username,jid,grp) values (?, ?, ?)", user, jid, group);
+					end
+				end
+			end
+			for jid in pairs(pending) do
+				if not done[jid] then
+					self:modify("insert into rosterusers (username,jid,nick,subscription,ask,askmessage,server,subscribe) values (?, ?, ?, ?, ?. ''. ''. '')", user, jid, "", "N", "I");
+				end
+			end
+			local version = data[false] and data[false].version;
+			if version then
+				self:modify("insert into roster_version (username,version) values (?, ?)", user, version);
+			end
+			return true;
+		else
+			self:modify("delete from rosterusers where username=?", user);
+			self:modify("delete from rostergroups where username=?", user);
+			self:modify("delete from roster_version where username=?", user);
+		end
+	end;
+};
+
+-----------------------------
+local driver = {};
+driver.__index = driver;
+
+function driver:prepare(sql)
+	module:log("debug", "query: %s", sql);
+	local err;
+	if not self.sqlcache then self.sqlcache = {}; end
+	local r = self.sqlcache[sql];
+	if r then return r; end
+	r, err = database:prepare(sql);
+	if not r then error("Unable to prepare SQL statement: "..err); end
+	self.sqlcache[sql] = r;
+	return r;
+end
+
+function driver:query(sql, ...)
+	local stmt,err = self:prepare(sql);
+	if not stmt then
+		module:log("error", "Failed to prepare SQL [[%s]], error: %s", sql, err);
+		return nil, err;
+	end
+	local ok, err = stmt:execute(...);
+	if not ok then
+		module:log("error", "Failed to execute SQL [[%s]], error: %s", sql, err);
+		return nil, err;
+	end
+	return stmt;
+end
+function driver:modify(sql, ...)
+	local stmt, err = self:query(sql, ...);
+	if stmt and stmt:affected() > 0 then return stmt; end
+	return nil, err;
+end
+
+function driver:open(datastore, typ)
+	local instance = setmetatable({}, self);
+	instance.host = module.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);