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local json = require "util.json";
local resolve_relative_path = require "core.configmanager".resolve_relative_path;
local mod_sql = module:require("sql");
local params = module:get_option("sql");
local engine; -- TODO create engine
local function create_table()
--[[local Table,Column,Index = mod_sql.Table,mod_sql.Column,mod_sql.Index;
local ProsodyTable = Table {
name="prosody";
Column { name="host", type="TEXT", nullable=false };
Column { name="user", type="TEXT", nullable=false };
Column { name="store", type="TEXT", nullable=false };
Column { name="key", type="TEXT", nullable=false };
Column { name="type", type="TEXT", nullable=false };
Column { name="value", type="TEXT", nullable=false };
Index { name="prosody_index", "host", "user", "store", "key" };
};
engine:transaction(function()
ProsodyTable:create(engine);
end);]]
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")
:gsub(";$", " CHARACTER SET 'utf8' COLLATE 'utf8_bin';");
end
local index_sql = "CREATE INDEX `prosody_index` ON `prosody` (`host`, `user`, `store`, `key`)";
if params.driver == "PostgreSQL" then
index_sql = index_sql:gsub("`", "\"");
elseif params.driver == "MySQL" then
index_sql = index_sql:gsub("`([,)])", "`(20)%1");
end
local success,err = engine:transaction(function()
engine:execute(create_sql);
engine:execute(index_sql);
end);
if not success then -- so we failed to create
if params.driver == "MySQL" then
success,err = engine:transaction(function()
local result = engine:execute("SHOW COLUMNS FROM prosody WHERE Field='value' and Type='text'");
if result:rowcount() > 0 then
module:log("info", "Upgrading database schema...");
engine:execute("ALTER TABLE prosody MODIFY COLUMN `value` MEDIUMTEXT");
module:log("info", "Database table automatically upgraded");
end
return true;
end);
if not success then
module:log("error", "Failed to check/upgrade database schema (%s), please see "
.."http://prosody.im/doc/mysql for help",
err or "unknown error");
end
end
end
end
local function set_encoding()
if params.driver ~= "SQLite3" then
local set_names_query = "SET NAMES 'utf8';";
if params.driver == "MySQL" then
set_names_query = set_names_query:gsub(";$", " COLLATE 'utf8_bin';");
end
local success,err = engine:transaction(function() return engine:execute(set_names_query); end);
if not success then
module:log("error", "Failed to set database connection encoding to UTF8: %s", err);
return;
end
if params.driver == "MySQL" then
-- COMPAT w/pre-0.9: Upgrade tables to UTF-8 if not already
local check_encoding_query = "SELECT `COLUMN_NAME`,`COLUMN_TYPE` FROM `information_schema`.`columns` WHERE `TABLE_NAME`='prosody' AND ( `CHARACTER_SET_NAME`!='utf8' OR `COLLATION_NAME`!='utf8_bin' );";
local success,err = engine:transaction(function()
local result = engine:execute(check_encoding_query);
local n_bad_columns = result:rowcount();
if n_bad_columns > 0 then
module:log("warn", "Found %d columns in prosody table requiring encoding change, updating now...", n_bad_columns);
local fix_column_query1 = "ALTER TABLE `prosody` CHANGE `%s` `%s` BLOB;";
local fix_column_query2 = "ALTER TABLE `prosody` CHANGE `%s` `%s` %s CHARACTER SET 'utf8' COLLATE 'utf8_bin';";
for row in success:rows() do
local column_name, column_type = unpack(row);
engine:execute(fix_column_query1:format(column_name, column_name));
engine:execute(fix_column_query2:format(column_name, column_name, column_type));
end
module:log("info", "Database encoding upgrade complete!");
end
end);
local success,err = engine:transaction(function() return engine:execute(check_encoding_query); end);
if not success then
module:log("error", "Failed to check/upgrade database encoding: %s", err or "unknown error");
end
end
end
end
do -- process options to get a db connection
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");
--local dburi = db2uri(params);
engine = mod_sql:create_engine(params);
-- Encoding mess
set_encoding();
-- 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 host = module.host;
local user, store;
local function keyval_store_get()
local haveany;
local result = {};
for row in engine:select("SELECT `key`,`type`,`value` FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?", host, user, store) do
haveany = true;
local k = row[1];
local v = deserialize(row[2], row[3]);
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
if haveany then
return result;
end
end
local function keyval_store_set(data)
engine:delete("DELETE FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?", host, user, store);
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);
assert(t, value);
engine:insert("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", host, user, store, key, t, value);
else
extradata[key] = value;
end
end
if next(extradata) ~= nil then
local t, extradata = serialize(extradata);
assert(t, extradata);
engine:insert("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", host, user, store, "", t, extradata);
end
end
return true;
end
local keyval_store = {};
keyval_store.__index = keyval_store;
function keyval_store:get(username)
user,store = username,self.store;
return select(2, engine:transaction(keyval_store_get));
end
function keyval_store:set(username, data)
user,store = username,self.store;
return engine:transaction(function()
return keyval_store_set(data);
end);
end
function keyval_store:users()
return engine:transaction(function()
return engine:select("SELECT DISTINCT `user` FROM `prosody` WHERE `host`=? AND `store`=?", host, self.store);
end);
end
local driver = {};
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
function driver:stores(username)
local sql = "SELECT DISTINCT `store` FROM `prosody` WHERE `host`=? AND `user`" ..
(username == true and "!=?" or "=?");
if username == true or not username then
username = "";
end
return engine:transaction(function()
return engine:select(sql, host, username);
end);
end
function driver:purge(username)
return engine:transaction(function()
local stmt,err = engine:delete("DELETE FROM `prosody` WHERE `host`=? AND `user`=?", host, username);
return true,err;
end);
end
module:provides("storage", driver);
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