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Taddeüs Kroes
webbasics
Commits
6c8b446f
Commit
6c8b446f
authored
Jul 14, 2012
by
Taddeus Kroes
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Added Router class.
parent
1dee302c
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138 additions
and
0 deletions
+138
-0
router.php
router.php
+94
-0
tests/test_router.php
tests/test_router.php
+44
-0
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router.php
0 → 100644
View file @
6c8b446f
<?php
/**
* Functions for URL routing: given an URL, call the corresponding handler
* function (the 'route' to the corresponding output).
*
* @author Taddeus Kroes
* @version 1.0
* @date 14-07-2012
*/
namespace
BasicWeb
;
require_once
'base.php'
;
/**
*
*
* <code>
*
* </code>
*
* @package BasicWeb
*/
class
Router
extends
Base
{
/**
* The regex delimiter that is added to the begin and end of patterns.
*
* @var string
*/
const
DELIMITER
=
'%'
;
/**
* An associative array of regex patterns pointing to handler functions.
*
* @var array
*/
private
$routes
=
array
();
/**
* Create a new Router instance.
*
* @param array $routes An initial list of routes to set.
*/
function
__construct
(
array
$routes
=
array
())
{
foreach
(
$routes
as
$pattern
=>
$handler
)
$this
->
add_route
(
$pattern
,
$handler
);
}
/**
* Add a route as a (pattern, handler) pair.
*
* The pattern is regular expression pattern without delimiters. The
* function adds '%^' at the begin and '$%' at the end of the pattern as
* delimiters.
*
* The handler function must receive no arguments if the regex pattern
* does not contain groups (which are contained in parentheses). If there
* are groups, the matches for these are passed to the handler fucntion in
* an array.
*
* @param string $pattern A regex pattern to mach URL's against.
* @param mixed $handler The handler function to call when $pattern is matched.
* @throws \InvalidArgumentException If $handler is not callable.
*/
function
add_route
(
$pattern
,
$handler
)
{
if
(
!
is_callable
(
$handler
)
)
throw
new
\InvalidArgumentException
(
sprintf
(
'Handler for patterns "%s" is not callable.'
,
$pattern
));
$this
->
routes
[
self
::
DELIMITER
.
'^'
.
$pattern
.
'$'
.
self
::
DELIMITER
]
=
$handler
;
}
/**
* Call the handler function corresponding to the specified url.
*
* If any groups are in the matched regex pattern, a list of matches is
* passed to the handler function.
*
* @param string $url An url to match the saved patterns against.
* @return mixed FALSE if no pattern was matched, the return value of the
* corresponding handler function otherwise.
*/
function
call_handler
(
$url
)
{
foreach
(
$this
->
routes
as
$pattern
=>
$handler
)
{
if
(
preg_match
(
$pattern
,
$url
,
$matches
)
)
{
array_shift
(
$matches
);
return
call_user_func_array
(
$handler
,
$matches
);
}
}
return
false
;
}
}
?>
\ No newline at end of file
tests/test_router.php
0 → 100644
View file @
6c8b446f
<?php
require_once
'router.php'
;
use
BasicWeb\Router
;
function
test_handler_no_args
()
{
return
true
;
}
function
test_handler_arg
(
$arg
)
{
return
$arg
;
}
function
test_handler_args
(
$arg0
,
$arg1
)
{
return
$arg1
.
$arg0
;
}
class
RouterTest
extends
PHPUnit_Framework_TestCase
{
function
setUp
()
{
$this
->
router
=
new
Router
(
array
(
'foo'
=>
'test_handler_no_args'
,
'(ba[rz])'
=>
'test_handler_arg'
,
'(ba[rz])(ba[rz])'
=>
'test_handler_args'
,
));
}
function
test_call_handler_success
()
{
$this
->
assertEquals
(
$this
->
router
->
call_handler
(
'foo'
),
true
);
$this
->
assertEquals
(
$this
->
router
->
call_handler
(
'bar'
),
'bar'
);
$this
->
assertEquals
(
$this
->
router
->
call_handler
(
'baz'
),
'baz'
);
$this
->
assertEquals
(
$this
->
router
->
call_handler
(
'bazbar'
),
'barbaz'
);
}
function
test_call_handler_failure
()
{
$this
->
assertFalse
(
$this
->
router
->
call_handler
(
'barfoo'
));
}
function
test_add_route
()
{
$this
->
router
->
add_route
(
'(foobar)'
,
'test_handler_arg'
);
$this
->
assertEquals
(
$this
->
router
->
call_handler
(
'foobar'
),
'foobar'
);
}
}
?>
\ No newline at end of file
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