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--[[
DB Tables:
Prosody - key-value, map
| host | user | store | key | type | value |
ProsodyArchive - list
| host | user | store | key | time | stanzatype | jsonvalue |
Mapping:
Roster - Prosody
| host | user | "roster" | "contactjid" | type | value |
| host | user | "roster" | NULL | "json" | roster[false] data |
Account - Prosody
| host | user | "accounts" | "username" | type | value |
Offline - ProsodyArchive
| host | user | "offline" | "contactjid" | time | "message" | json|XML |
]]
local type = type;
local tostring = tostring;
local tonumber = tonumber;
local pairs = pairs;
local next = next;
local setmetatable = setmetatable;
local xpcall = xpcall;
local json = require "util.json";
local DBI;
local connection;
local host,user,store = module.host;
local params = module:get_option("sql");
local resolve_relative_path = require "core.configmanager".resolve_relative_path;
local function test_connection()
if not connection then return nil; end
if connection:ping() then
return true;
else
module:log("debug", "Database connection closed");
connection = nil;
end
end
local function connect()
if not test_connection() then
prosody.unlock_globals();
local dbh, err = DBI.Connect(
params.driver, params.database,
params.username, params.password,
params.host, params.port
);
prosody.lock_globals();
if not dbh then
module:log("debug", "Database connection failed: %s", tostring(err));
return nil, err;
end
module:log("debug", "Successfully connected to database");
dbh:autocommit(false); -- don't commit automatically
connection = dbh;
return connection;
end
end
local function create_table()
if not module:get_option("sql_manage_tables", true) then
return;
end
local create_sql = "CREATE TABLE `prosody` (`host` TEXT, `user` TEXT, `store` TEXT, `key` TEXT, `type` TEXT, `value` TEXT);";
if params.driver == "PostgreSQL" then
create_sql = create_sql:gsub("`", "\"");
elseif params.driver == "MySQL" then
create_sql = create_sql:gsub("`value` TEXT", "`value` MEDIUMTEXT");
end
local stmt, err = connection:prepare(create_sql);
if stmt then
local ok = stmt:execute();
local commit_ok = connection:commit();
if ok and commit_ok then
module:log("info", "Initialized new %s database with prosody table", params.driver);
local index_sql = "CREATE INDEX `prosody_index` ON `prosody` (`host`, `user`, `store`, `key`)";
if params.driver == "PostgreSQL" then
index_sql = index_sql:gsub("`", "\"");
elseif params.driver == "MySQL" then
index_sql = index_sql:gsub("`([,)])", "`(20)%1");
end
local stmt, err = connection:prepare(index_sql);
local ok, commit_ok, commit_err;
if stmt then
ok, err = stmt:execute();
commit_ok, commit_err = connection:commit();
end
if not(ok and commit_ok) then
module:log("warn", "Failed to create index (%s), lookups may not be optimised", err or commit_err);
end
elseif params.driver == "MySQL" then -- COMPAT: Upgrade tables from 0.8.0
-- Failed to create, but check existing MySQL table here
local stmt = connection:prepare("SHOW COLUMNS FROM prosody WHERE Field='value' and Type='text'");
local ok = stmt:execute();
local commit_ok = connection:commit();
if ok and commit_ok then
if stmt:rowcount() > 0 then
module:log("info", "Upgrading database schema...");
local stmt = connection:prepare("ALTER TABLE prosody MODIFY COLUMN `value` MEDIUMTEXT");
local ok, err = stmt:execute();
local commit_ok = connection:commit();
if ok and commit_ok then
module:log("info", "Database table automatically upgraded");
else
module:log("error", "Failed to upgrade database schema (%s), please see "
.."http://prosody.im/doc/mysql for help",
err or "unknown error");
end
end
repeat until not stmt:fetch();
end
end
elseif params.driver ~= "SQLite3" then -- SQLite normally fails to prepare for existing table
module:log("warn", "Prosody was not able to automatically check/create the database table (%s), "
.."see http://prosody.im/doc/modules/mod_storage_sql#table_management for help.",
err or "unknown error");
end
end
do -- process options to get a db connection
local ok;
prosody.unlock_globals();
ok, DBI = pcall(require, "DBI");
if not ok then
package.loaded["DBI"] = {};
module:log("error", "Failed to load the LuaDBI library for accessing SQL databases: %s", DBI);
module:log("error", "More information on installing LuaDBI can be found at http://prosody.im/doc/depends#luadbi");
end
prosody.lock_globals();
if not ok or not DBI.Connect then
return; -- Halt loading of this module
end
params = params or { driver = "SQLite3" };
if params.driver == "SQLite3" then
params.database = resolve_relative_path(prosody.paths.data or ".", params.database or "prosody.sqlite");
end
assert(params.driver and params.database, "Both the SQL driver and the database need to be specified");
assert(connect());
-- Automatically create table, ignore failure (table probably already exists)
create_table();
end
local function serialize(value)
local t = type(value);
if t == "string" or t == "boolean" or t == "number" then
return t, tostring(value);
elseif t == "table" then
local value,err = json.encode(value);
if value then return "json", value; end
return nil, err;
end
return nil, "Unhandled value type: "..t;
end
local function deserialize(t, value)
if t == "string" then return value;
elseif t == "boolean" then
if value == "true" then return true;
elseif value == "false" then return false; end
elseif t == "number" then return tonumber(value);
elseif t == "json" then
return json.decode(value);
end
end
local function getsql(sql, ...)
if params.driver == "PostgreSQL" then
sql = sql:gsub("`", "\"");
end
-- do prepared statement stuff
local stmt, err = connection:prepare(sql);
if not stmt and not test_connection() then error("connection failed"); end
if not stmt then module:log("error", "QUERY FAILED: %s %s", err, debug.traceback()); return nil, err; end
-- run query
local ok, err = stmt:execute(host or "", user or "", store or "", ...);
if not ok and not test_connection() then error("connection failed"); end
if not ok then return nil, err; end
return stmt;
end
local function setsql(sql, ...)
local stmt, err = getsql(sql, ...);
if not stmt then return stmt, err; end
return stmt:affected();
end
local function transact(...)
-- ...
end
local function rollback(...)
if connection then connection:rollback(); end -- FIXME check for rollback error?
return ...;
end
local function commit(...)
if not connection:commit() then return nil, "SQL commit failed"; end
return ...;
end
local function keyval_store_get()
local stmt, err = getsql("SELECT * FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?");
if not stmt then return rollback(nil, err); end
local haveany;
local result = {};
for row in stmt:rows(true) do
haveany = true;
local k = row.key;
local v = deserialize(row.type, row.value);
if k and v then
if k ~= "" then result[k] = v; elseif type(v) == "table" then
for a,b in pairs(v) do
result[a] = b;
end
end
end
end
return commit(haveany and result or nil);
end
local function keyval_store_set(data)
local affected, err = setsql("DELETE FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?");
if not affected then return rollback(affected, err); end
if data and next(data) ~= nil then
local extradata = {};
for key, value in pairs(data) do
if type(key) == "string" and key ~= "" then
local t, value = serialize(value);
if not t then return rollback(t, value); end
local ok, err = setsql("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", key, t, value);
if not ok then return rollback(ok, err); end
else
extradata[key] = value;
end
end
if next(extradata) ~= nil then
local t, extradata = serialize(extradata);
if not t then return rollback(t, extradata); end
local ok, err = setsql("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", "", t, extradata);
if not ok then return rollback(ok, err); end
end
end
return commit(true);
end
local keyval_store = {};
keyval_store.__index = keyval_store;
function keyval_store:get(username)
user,store = username,self.store;
if not connection and not connect() then return nil, "Unable to connect to database"; end
local success, ret, err = xpcall(keyval_store_get, debug.traceback);
if not connection and connect() then
success, ret, err = xpcall(keyval_store_get, debug.traceback);
end
if success then return ret, err; else return rollback(nil, ret); end
end
function keyval_store:set(username, data)
user,store = username,self.store;
if not connection and not connect() then return nil, "Unable to connect to database"; end
local success, ret, err = xpcall(function() return keyval_store_set(data); end, debug.traceback);
if not connection and connect() then
success, ret, err = xpcall(function() return keyval_store_set(data); end, debug.traceback);
end
if success then return ret, err; else return rollback(nil, ret); end
end
local function map_store_get(key)
local stmt, err = getsql("SELECT * FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
if not stmt then return rollback(nil, err); end
local haveany;
local result = {};
for row in stmt:rows(true) do
haveany = true;
local k = row.key;
local v = deserialize(row.type, row.value);
if k and v then
if k ~= "" then result[k] = v; elseif type(v) == "table" then
for a,b in pairs(v) do
result[a] = b;
end
end
end
end
return commit(haveany and result[key] or nil);
end
local function map_store_set(key, data)
local affected, err = setsql("DELETE FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
if not affected then return rollback(affected, err); end
if data and next(data) ~= nil then
if type(key) == "string" and key ~= "" then
local t, value = serialize(data);
if not t then return rollback(t, value); end
local ok, err = setsql("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", key, t, value);
if not ok then return rollback(ok, err); end
else
-- TODO non-string keys
end
end
return commit(true);
end
local map_store = {};
map_store.__index = map_store;
function map_store:get(username, key)
user,store = username,self.store;
local success, ret, err = xpcall(function() return map_store_get(key); end, debug.traceback);
if success then return ret, err; else return rollback(nil, ret); end
end
function map_store:set(username, key, data)
user,store = username,self.store;
local success, ret, err = xpcall(function() return map_store_set(key, data); end, debug.traceback);
if success then return ret, err; else return rollback(nil, ret); end
end
local list_store = {};
list_store.__index = list_store;
function list_store:scan(username, from, to, jid, typ)
user,store = username,self.store;
local cols = {"from", "to", "jid", "typ"};
local vals = { from , to , jid , typ };
local stmt, err;
local query = "SELECT * FROM `prosodyarchive` WHERE `host`=? AND `user`=? AND `store`=?";
query = query.." ORDER BY time";
--local stmt, err = getsql("SELECT * FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
return nil, "not-implemented"
end
local driver = { name = "sql" };
function driver:open(store, typ)
if not typ then -- default key-value store
return setmetatable({ store = store }, keyval_store);
end
return nil, "unsupported-store";
end
module:add_item("data-driver", driver);
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