mod_console: Update for new net.server API

[prosody.git] / util / datamanager.lua

diff --git a/util/datamanager.lua b/util/datamanager.lua
index 9d3c8592b3293ee8f4fca503190ab467ee0b759e..4d07d6ccfdcdbd9d5246f0beb0402f32467554ed 100644 (file)
--- a/util/datamanager.lua
+++ b/util/datamanager.lua
@@ -1,4 +1,4 @@
--- Prosody IM v0.4
+-- Prosody IM
 -- Copyright (C) 2008-2009 Matthew Wild
 -- Copyright (C) 2008-2009 Waqas Hussain
 -- 
@@ -50,14 +50,42 @@ local function mkdir(path)
 end
 
 local data_path = "data";
+local callbacks = {};
 
 ------- API -------------
 
 function set_data_path(path)
-       log("info", "Setting data path to: %s", path);
+       log("debug", "Setting data path to: %s", path);
        data_path = path;
 end
 
+local function callback(username, host, datastore, data)
+       for _, f in ipairs(callbacks) do
+               username, host, datastore, data = f(username, host, datastore, data);
+               if username == false then break; end
+       end
+       
+       return username, host, datastore, data;
+end
+function add_callback(func)
+       if not callbacks[func] then -- Would you really want to set the same callback more than once?
+               callbacks[func] = true;
+               callbacks[#callbacks+1] = func;
+               return true;
+       end
+end
+function remove_callback(func)
+       if callbacks[func] then
+               for i, f in ipairs(callbacks) do
+                       if f == func then
+                               callbacks[i] = nil;
+                               callbacks[f] = nil;
+                               return true;
+                       end
+               end
+       end
+end
+
 function getpath(username, host, datastore, ext, create)
        ext = ext or "dat";
        host = host and encode(host);
@@ -93,6 +121,12 @@ function store(username, host, datastore, data)
        if not data then
                data = {};
        end
+
+       username, host, datastore, data = callback(username, host, datastore, data);
+       if username == false then
+               return true; -- Don't save this data at all
+       end
+
        -- save the datastore
        local f, msg = io_open(getpath(username, host, datastore, nil, true), "w+");
        if not f then
@@ -102,7 +136,8 @@ function store(username, host, datastore, data)
        f:write("return ");
        append(f, data);
        f:close();
-       if not next(data) then -- try to delete empty datastore
+       if next(data) == nil then -- try to delete empty datastore
+               log("debug", "Removing empty %s datastore for user %s@%s", datastore, username or "nil", host or "nil");
                os_remove(getpath(username, host, datastore));
        end
        -- we write data even when we are deleting because lua doesn't have a
@@ -112,6 +147,7 @@ end
 
 function list_append(username, host, datastore, data)
        if not data then return; end
+       if callback(username, host, datastore) == false then return true; end
        -- save the datastore
        local f, msg = io_open(getpath(username, host, datastore, "list", true), "a+");
        if not f then
@@ -129,6 +165,7 @@ function list_store(username, host, datastore, data)
        if not data then
                data = {};
        end
+       if callback(username, host, datastore) == false then return true; end
        -- save the datastore
        local f, msg = io_open(getpath(username, host, datastore, "list", true), "w+");
        if not f then
@@ -141,7 +178,8 @@ function list_store(username, host, datastore, data)
                f:write(");\n");
        end
        f:close();
-       if not next(data) then -- try to delete empty datastore
+       if next(data) == nil then -- try to delete empty datastore
+               log("debug", "Removing empty %s datastore for user %s@%s", datastore, username or "nil", host or "nil");
                os_remove(getpath(username, host, datastore, "list"));
        end
        -- we write data even when we are deleting because lua doesn't have a