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local assert = assert;
local have_DBI = pcall(require,"DBI");
local print = print;
local type = type;
local next = next;
local pairs = pairs;
local t_sort = table.sort;
local json = require "util.json";
local mtools = require "migrator.mtools";
local tostring = tostring;
local tonumber = tonumber;
if not have_DBI then
error("LuaDBI (required for SQL support) was not found, please see http://prosody.im/doc/depends#luadbi", 0);
end
local sql = require "util.sql";
local function create_table(engine, name) -- luacheck: ignore 431/engine
local Table, Column, Index = sql.Table, sql.Column, sql.Index;
local ProsodyTable = Table {
name= name or "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="MEDIUMTEXT", nullable=false };
Index { name="prosody_index", "host", "user", "store", "key" };
};
engine:transaction(function()
ProsodyTable:create(engine);
end);
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 decode_user(item)
local userdata = {
user = item[1][1].user;
host = item[1][1].host;
stores = {};
};
for i=1,#item do -- loop over stores
local result = {};
local store = item[i];
for i=1,#store do -- loop over store data
local row = store[i];
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
userdata.stores[store[1].store] = result;
end
end
return userdata;
end
local function reader(input)
local engine = assert(sql:create_engine(input);
local keys = {"host", "user", "store", "key", "type", "value"};
assert(engine:connect());
local f,s,val = assert(engine:select("SELECT `host`, `user`, `store`, `key`, `type`, `value` FROM `prosody`;"));
-- get SQL rows, sorted
local iter = mtools.sorted {
reader = function() val = f(s, val); return val; end;
filter = function(x)
for i=1,#keys do
x[ keys[i] ] = x[i];
end
if x.host == "" then x.host = nil; end
if x.user == "" then x.user = nil; end
if x.store == "" then x.store = nil; end
return x;
end;
sorter = function(a, b)
local a_host, a_user, a_store = a.host or "", a.user or "", a.store or "";
local b_host, b_user, b_store = b.host or "", b.user or "", b.store or "";
return a_host > b_host or (a_host==b_host and a_user > b_user) or (a_host==b_host and a_user==b_user and a_store > b_store);
end;
};
-- merge rows to get stores
iter = mtools.merged(iter, function(a, b)
return (a.host == b.host and a.user == b.user and a.store == b.store);
end);
-- merge stores to get users
iter = mtools.merged(iter, function(a, b)
return (a[1].host == b[1].host and a[1].user == b[1].user);
end);
return function()
local x = iter();
return x and decode_user(x);
end;
end
local function writer(output, iter)
local engine = assert(sql:create_engine(output, function (engine) -- luacheck: ignore 431/engine
create_table(engine);
end));
assert(engine:connect());
assert(engine:delete("DELETE FROM prosody"));
local insert_sql = "INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)";
return function(item)
if not item then return end -- end of input
local host = item.host or "";
local user = item.user or "";
for store, data in pairs(item.stores) do
-- TODO transactions
local extradata = {};
for key, value in pairs(data) do
if type(key) == "string" and key ~= "" then
local t, value = assert(serialize(value));
local ok, err = assert(engine:insert(insert_sql, host, user, store, key, t, value));
else
extradata[key] = value;
end
end
if next(extradata) ~= nil then
local t, extradata = assert(serialize(extradata));
local ok, err = assert(engine:insert(insert_sql, host, user, store, "", t, extradata));
end
end
end;
end
return {
reader = reader;
writer = writer;
}
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