93 lines
2.6 KiB
Lua
93 lines
2.6 KiB
Lua
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-- reserve the namespace
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save_restore = {}
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-- TODO: if this gets more versatile, add sanity checks for filename
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-- TODO: apart from allowing filenames, schems/<filename> also needs to be allowed
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-- TODO: save and restore ought to be library functions and not implemented in each individual mod!
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save_restore.save_data = function( filename, data )
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local path = minetest.get_worldpath()..'/'..filename;
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local file = io.open( path, 'w' );
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if( file ) then
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file:write( minetest.serialize( data ));
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file:close();
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else
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print("[save_restore] Error: Savefile '"..tostring( path ).."' could not be written.");
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end
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end
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save_restore.restore_data = function( filename )
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local file = io.open( minetest.get_worldpath()..'/'..filename, 'r' );
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if( file ) then
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local data = file:read("*all");
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file:close();
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return minetest.deserialize( data );
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else
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print("[save_restore] Error: Savefile '"..tostring( filename ).."' not found.");
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return {}; -- return empty table
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end
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end
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save_restore.file_exists = function( filename )
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local file = save_restore.file_access( filename, 'r' );
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if( file ) then
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file:close();
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return true;
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end
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return;
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end
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save_restore.create_schems_directory = function()
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local directory = minetest.get_worldpath()..'/schems';
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if( not( save_restore.file_exists( directory ))) then
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if( minetest.mkdir ) then
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minetest.mkdir( directory );
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else
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os.execute("mkdir \""..directory.. "\"");
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end
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end
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end
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-- we only need the function io.open in a version that can read schematic files from diffrent places,
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-- even if a secure environment is enforced; this does require an exception for the mod
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local ie_io_open = io.open;
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--[[ does not work anyway
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if( minetest.request_insecure_environment ) then
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local ie, req_ie = _G, minetest.request_insecure_environment
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if req_ie then ie = req_ie() end
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if ie then
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ie_io_open = ie.io.open;
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end
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end
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--]]
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-- only a certain type of files can be read and written
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save_restore.file_access = function( path, params )
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if( (params=='r' or params=='rb')
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and ( string.find( path, '.mts', -4 )
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or string.find( path, '.schematic', -11 )
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or string.find( path, '.we', -3 )
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or string.find( path, '.meta', -5 )
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or string.find( path, '.wem', -4 ) )) then
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return ie_io_open( path, params );
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elseif( (params=='w' or params=='wb')
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and ( string.find( path, '.mts', -4 )
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or string.find( path, '.schematic', -11 )
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or string.find( path, '.we', -3 )
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or string.find( path, '.meta', -5 )
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or string.find( path, '.wem', -4 ) )) then
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return ie_io_open( path, params );
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end
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end
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