Very basic user management

Added an user list page and a form to create new users. All users can
create other users.

includes/t-basics/dao_users.inc.php

@@ -0,0 +1,79 @@
+<?php
+
+
+class Dao_Users
+	extends DAO
+{
+	private function hashPassword( $password , $salt , $iterations )
+	{
+		$hash = $password;
+		$salt = trim( $salt );
+		do {
+			$hash = sha1( "$salt$hash$salt" );
+			$iterations --;
+		} while ( $iterations > 0 );
+		return $hash;
+	}
+
+
+	public function getUsers( )
+	{
+		return $this->query( 'SELECT user_id , user_email FROM users ORDER BY LOWER( user_email )' )->execute( );
+	}
+
+
+	public function getUser( $email )
+	{
+		$query = $this->query( 'SELECT * FROM users WHERE user_email = LOWER( $1 )' );
+		$results = $query->execute( $email );
+		if ( empty( $results ) ) {
+			return null;
+		}
+		return array_shift( $results );
+	}
+
+
+	public function checkLogin( $email , $password )
+	{
+		$userData = $this->getUser( $email );
+		if ( $userData != null ) {
+			$hashed = $this->hashPassword( $password ,
+				$userData->user_salt ,
+				$userData->user_iterations );
+			if ( $hashed === $userData->user_hash ) {
+				return $userData;
+			}
+		}
+		return null;
+	}
+
+
+	public function addUser( $email , $password )
+	{
+		$iterations = rand( 130 , 160 );
+
+		$randSource = array( );
+		for ( $i = 0 ; $i < 26 ; $i ++ ) {
+			array_push( $randSource , chr( $i + ord( 'a' ) ) );
+			array_push( $randSource , chr( $i + ord( 'A' ) ) );
+			if ( $i < 10 ) {
+				array_push( $randSource , chr( $i + 48 ) );
+			}
+		}
+		shuffle( $randSource );
+		$salt = join( '' , array_splice( $randSource , 0 , 4 ) );
+
+		$hash = $this->hashPassword( $password , $salt , $iterations );
+
+		$result = $this->query( 'SELECT users_add( $1 , $2 , $3 , $4 ) AS error' )
+			->execute( $email , $salt , $iterations , $hash );
+		return $result[ 0 ]->error;
+	}
+
+
+	public function hasUsers( )
+	{
+		$result = $this->query( 'SELECT COUNT(*) AS n_users FROM users' )->execute( );
+		return $result[0]->n_users;
+	}
+}

includes/t-basics/package.inc.php

@@ -2,8 +2,8 @@
 
 $package[ 'requires' ][] = 'form';
 $package[ 'requires' ][] = 'hub-page';
-$package[ 'requires' ][] = 't-users';
 
+$package[ 'files' ][] = 'dao_users';
 $package[ 'files' ][] = 'controllers';
 $package[ 'files' ][] = 'pages';
 
@@ -20,3 +20,4 @@ $package[ 'pages' ][] = 'tasks_home';
 $package[ 'pages' ][] = 'tasks_login';
 $package[ 'pages' ][] = 'tasks_logout';
 
+$package[ 'daos' ][] = 'users';

includes/t-basics/pages.inc.php

@@ -14,6 +14,7 @@ abstract class AuthenticatedPage
 		return array(
 			'items'		=> 'Items' ,
 			'tasks'		=> 'Tasks' ,
+			'users'		=> 'Users' ,
 			'logout'	=> 'Log out'
 		);
 	}