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--[[
DB Tables:
Prosody - key-value, map
| host | user | store | key | subkey | type | value |
ProsodyArchive - list
| host | user | store | key | time | stanzatype | jsonvalue |
Mapping:
Roster - Prosody
| host | user | "roster" | "contactjid" | item-subkey | type | value |
| host | user | "roster" | NULL | NULL | "json" | roster[false] data |
Account - Prosody
| host | user | "accounts" | "username" | NULL | 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 json = { stringify = function(s) return require"util.serialization".serialize(s) end, parse = require"util.serialization".deserialze };
local connection = ...;
local host,user,store = module.host;
do -- process options to get a db connection
local DBI = require "DBI";
local params = module:get_option("sql");
assert(params and params.driver and params.database, "invalid params");
prosody.unlock_globals();
local dbh, err = DBI.Connect(
params.driver, params.database,
params.username, params.password,
params.host, params.port
);
prosody.lock_globals();
assert(dbh, err);
dbh:autocommit(false); -- don't commit automatically
connection = dbh;
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.stringify(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 t;
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 value == "json" then
return json.parse(value);
end
end
local function getsql(sql, ...)
-- do prepared statement stuff
local stmt, err = connection:prepare(sql);
if not stmt then return nil, err; end
-- run query
local ok, err = stmt:execute(host, user, store, ...);
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(...)
connection:rollback(); -- FIXME check for rollback error?
return ...;
end
local function commit(...)
if not connection:commit() then return nil, "SQL commit failed"; end
return ...;
end
local keyval_store = {};
keyval_store.__index = keyval_store;
function keyval_store:get(username)
user,store = username,self.store;
local stmt, err = getsql("SELECT * FROM Prosody WHERE host=? AND user=? AND store=? AND subkey=NULL");
if not stmt then return 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 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 haveany and result or nil;
end
function keyval_store:set(username, data)
user,store = username,self.store;
-- start transaction
local affected, err = setsql("DELETE FROM Prosody WHERE host=? AND user=? AND store=? AND subkey=NULL");
if data and next(data) ~= nil then
local extradata = {};
for key, value in pairs(data) do
if type(key) == "string" 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 (?,?,?,?,?,?)", nil, t, extradata);
if not ok then return rollback(ok, err); end
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 stmt, err = getsql("SELECT * FROM Prosody WHERE host=? AND user=? AND store=? AND key=?", key);
if not stmt then return nil, err; end
local haveany;
local result = {};
for row in stmt:rows(true) do
haveany = true;
local k = row.subkey;
local v = deserialize(row.type, row.value);
if 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 haveany and result or nil;
end
function map_store:set(username, key, data)
user,store = username,self.store;
-- start transaction
local affected, err = setsql("DELETE FROM Prosody WHERE host=? AND user=? AND store=? AND key=?", key);
if data and next(data) ~= nil then
local extradata = {};
for subkey, value in pairs(data) do
if type(subkey) == "string" 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,subkey,type,value) VALUES (?,?,?,?,?,?)", key, subkey, t, value);
if not ok then return rollback(ok, err); end
else
extradata[subkey] = 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,subkey,type,value) VALUES (?,?,?,?,?,?)", key, nil, t, extradata);
if not ok then return rollback(ok, err); end
end
end
return commit(true);
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);
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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