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create table nodes (
node_id int not null auto_increment,
is_directory boolean default false,
relative_path varchar(500) not null,
type varchar(20) not null default 'data',
name varchar(100) not null default 'no name',
primary key (node_id)
);
/*base user information*/
create table users (
user_id int not null auto_increment,
username varchar(50) not null unique,
password varchar(255) not null,
email varchar(50),
home_directory int not null,
primary key (user_id),
foreign key (home_directory) references nodes(node_id)
);
create table node_access (
node_id int not null,
user_id int not null,
can_view boolean not null default true,
can_edit boolean not null default false,
check (can_view=true or can_edit=true) ,
foreign key (node_id) references nodes(node_id),
foreign key (user_id) references users(user_id)
);
create table node_links (
directory_id int not null,
node_id int not null,
check (directory_id != node_id),
foreign key (directory_id) references nodes(node_id),
foreign key (node_id) references nodes(node_id)
);
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