<?php

/*
*  Copyright (c) Codiad & Kent Safranski (codiad.com), distributed
*  as-is and without warranty under the MIT License. See
*  [root]/license.txt for more. This information must remain intact.
*/

require_once('../../common.php');
require_once('class.user.php');

if( ! isset( $_GET['action'] ) ) {
	
	die( formatJSEND( "error", "Missing parameter" ) );
}

//////////////////////////////////////////////////////////////////
// Verify Session or Key
//////////////////////////////////////////////////////////////////

if( $_GET['action'] != 'authenticate' ) {
	
	checkSession();
}

$User = new User();

//////////////////////////////////////////////////////////////////
// Authenticate
//////////////////////////////////////////////////////////////////

if($_GET['action']=='authenticate') {
	
	if( ! isset( $_POST['username'] ) || ! isset( $_POST['password'] ) ) {
		
		die( formatJSEND( "error", "Missing username or password" ) );
	}
	
	$username = User::CleanUsername( $_POST['username'] );
	$password = $User->encrypt_password( $_POST['password'] );
	
	// check if the asked languages exist and is registered in languages/code.php
	require_once '../../languages/code.php';
	if( isset( $languages[$_POST['language']] ) ) {
		
		$lang = $_POST['language'];
	} else {
		
		$lang = 'en';
	}
	
	// theme
	$theme = $_POST['theme'];
	$permissions = array(
		"755",
		"0755"
	);
	
	if( ! is_dir( SESSIONS_PATH ) ) {
		
		mkdir( SESSIONS_PATH, 00755 );
	}
	
	$server_user = getmyuid();
	$sessions_permissions = substr( sprintf( '%o', fileperms( SESSIONS_PATH ) ), -4 );
	$sessions_owner = fileowner( SESSIONS_PATH );
	
	if( is_array( $server_user ) ) {
		
		$server_user = $server_user["uid"];
	}
	
	if( ! ( $sessions_owner === $server_user ) ) {
		
		try {
			
			chown( SESSIONS_PATH, $server_user );
		} catch( Exception $e ) {
			
			exit( formatJSEND("error", "Error, incorrect owner of sessions folder.  Expecting: $server_user, Recieved: " . $sessions_owner ) );
		}
	}
	
	if( ! in_array( $sessions_permissions, $permissions ) ) {
		
		try {
			
			chmod( SESSIONS_PATH, 00755 );
		} catch( Exception $e ) {
			
			exit( formatJSEND("error", "Error, incorrect permissions on sessions folder.  Expecting: 0755, Recieved: " . $sessions_permissions ) );
		}
	}
	
	$pass = $User->Authenticate( $username, $password );
	
	if( $pass ) {
		
		$_SESSION['lang'] = $lang;
		$_SESSION['theme'] = $theme;
		exit( formatJSEND( "success", array( "username" => $this->username ) ) );
	} else {
		
		exit( formatJSEND( "error", "Incorrect Username or Password" ) );
	}
}

//////////////////////////////////////////////////////////////////
// Logout
//////////////////////////////////////////////////////////////////

if( $_GET['action'] == 'logout' ) {
	
	logout();
}

//////////////////////////////////////////////////////////////////
// Create User
//////////////////////////////////////////////////////////////////

if( $_GET['action'] == 'create' ) {
	
	if( checkAccess() ) {
		
		if ( ! isset( $_POST['username'] ) || ! isset( $_POST['password'] ) ) {
			
			exit( formatJSEND( "error", "Missing username or password" ) );
		}
		
		if ( ! ( $_POST['password'] === $_POST['password2'] ) ) {
			
			exit( formatJSEND( "error", "Passwords do not match" ) );
		}
		
		if ( preg_match( '/[^\w\-\._@]/', $_POST['username'] ) ) {
			
			exit( formatJSEND( "error", "Invalid characters in username" ) );
		}
		
		$username = User::CleanUsername( $_POST['username'] );
		$password = $User->encrypt_password( $_POST['password'] );
		$User->Create( $username, $password );
	}
}

//////////////////////////////////////////////////////////////////
// Delete User
//////////////////////////////////////////////////////////////////

if( $_GET['action'] == 'delete' ) {
	
	if( checkAccess() ) {
		
		if( ! isset( $_GET['username'] ) ) {
			
			die( formatJSEND( "error", "Missing username" ) );
		}
		
		$User->username = User::CleanUsername( $_GET['username'] );
		$User->Delete();
	}
}

//////////////////////////////////////////////////////////////////
// Change Password
//////////////////////////////////////////////////////////////////

if( $_GET['action'] == 'password' ) {
	
	if( ! isset( $_POST['username']) || ! isset( $_POST['password'] ) ) {
		
		die( formatJSEND( "error", "Missing username or password" ) );
	}
	
	if( $_POST['username'] == $_SESSION['user'] || is_admin() ) {
		
		$User->username = User::CleanUsername( $_POST['username'] );
		$User->password = $_POST['password'];
		$User->Password();
	}
}

//////////////////////////////////////////////////////////////////
// Change Project
//////////////////////////////////////////////////////////////////

if( $_GET['action'] == 'project' ) {
	
	if( ! isset( $_GET['project'] ) ) {
		
		die( formatJSEND( "error", "Missing project" ) );
	}
	
	$User->username = $_SESSION['user'];
	$User->project = $_GET['project'];
	$User->Project();
}

//////////////////////////////////////////////////////////////////
// Search Users
//////////////////////////////////////////////////////////////////

if( $_GET['action'] == 'search_users' ) {
	
	if( ! isset( $_GET['search_term'] ) ) {
		
		die( formatJSEND( "error", "Missing search term" ) );
	}
	
	search_users( $_GET['search_term'], "exit", true );
}

//////////////////////////////////////////////////////////////////
// Verify User Account
//////////////////////////////////////////////////////////////////

if( $_GET['action'] == 'verify' ) {

	$User->username = $_SESSION['user'];
	checkSession();
}


if( $_GET['action'] == 'update_access' ) {

	checkSession();
	
	if( ! isset( $_POST['access'] ) || ! isset( $_POST['user'] ) ) {
		
		die( formatJSEND( "error", "Could not update access." ) );
	}
	
	if( ! is_admin() ) {
		
		die( formatJSEND( "error", "You do not have permission to update user's access." ) );
	}
	
	if( ! in_array( $_POST["access"], array_keys( Permissions::SYSTEM_LEVELS ) ) ) {
		
		exit( formatJSEND( "error", "Invalid access level specified." ) );
	}
	
	$User->update_access( $_POST["user"], $_POST["access"] );
}