ApprovalsDispatcher - Code Metrics - Inspection of "Adding approval functionality" - silverstripe/deploynaut - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#681)

by Sean

created 2016-10-06 00:51 UTC

ApprovalsDispatcher B

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	288
Duplicated Lines	31.25 %

Coupling/Cohesion

Components	1
Dependencies	10

Importance

Changes

Metric	Value
wmc	40
lcom	1
cbo	10
dl	90
loc	288
rs	8.2608
c	0
b	0
f	0

10 Methods

Rating	Name	Duplication	Size	Complexity
A	init()	14	14	3
B	approvers()	0	22	4
B	submit()	24	24	4
B	cancel()	25	25	4
C	approve()	12	48	10
B	reject()	3	28	5
B	validateDeployment()	12	12	5
A	getApprovers()	0	13	3
A	getModel()	0	3	1
A	Link()	0	3	1

How to fix Duplicated Code Complexity

Duplicated Code

Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.

Common duplication problems, and corresponding solutions are:

If you have the same expression in different places: Extract expression to a method
If you have the same method in different sub-classes: Extract method, and pull up field to the parent class
If you have the same code in unrelated classes: Consider extracting the code to a new class, and injecting that class

Complex Class

Tip: Before tackling complexity, make sure that you eliminate any duplication first. This often can reduce the size of classes significantly.

Complex classes like ApprovalsDispatcher often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.

Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.

While breaking up the class, it is a good idea to analyze how other classes use ApprovalsDispatcher, and based on these observations, apply Extract Interface, too.

<?php

class ApprovalsDispatcher extends Dispatcher {
namespace YourVendor;

class YourClass { }

	const ACTION_APPROVALS = 'approvals';

	const ALLOW_APPROVAL = 'ALLOW_APPROVAL';

	const ALLOW_APPROVAL_BYPASS = 'ALLOW_APPROVAL_BYPASS';

	/**
	 * @var array
	 */
	private static $allowed_actions = [

		'approvers',
		'submit',
		'cancel',
		'approve',
		'reject'
	];

	private static $dependencies = [
		'formatter' => '%$DeploynautAPIFormatter'
	];

	/**
	 * @var \DNProject
	 */
	protected $project = null;

	/**
	 * @var \DNEnvironment
	 */
	protected $environment = null;

	/**
	 * @var array
	 */
	private static $action_types = [

		self::ACTION_APPROVALS
	];

	/**
	 * This is a per request cache of $this->project()->listMembers()
	 * @var null|array
	 */
	private static $_cache_project_members = null;

	public function init() {

		parent::init();

		$this->project = $this->getCurrentProject();
		if (!$this->project) {
			return $this->project404Response();
		}

		// Performs canView permission check by limiting visible projects
		$this->environment = $this->getCurrentEnvironment($this->project);
		if (!$this->environment) {
			return $this->environment404Response();
		}
	}

	/**
	 * @param \SS_HTTPRequest $request
	 * @return \SS_HTTPResponse
	 */
	public function approvers(SS_HTTPRequest $request) {
		$list = [];

		if (self::$_cache_project_members === null) {
			self::$_cache_project_members = $this->project->listMembers();
class ParentClass {
    private $data = array();

    public function __call($method, array $args) {
        if (0 === strpos($method, 'get')) {
            return $this->data[strtolower(substr($method, 3))];
        }

        throw new \LogicException(sprintf('Unsupported method: %s', $method));
    }
}

/**
 * If this class knows which fields exist, you can specify the methods here:
 *
 * @method string getName()
 */
class SomeClass extends ParentClass { }
		}

		foreach (self::$_cache_project_members as $data) {
			if ($this->project->allowed(self::ALLOW_APPROVAL, Member::get()->byId($data['MemberID']))) {

				$list[] = [
					'id' => $data['MemberID'],
					'email' => $data['Email'],
					'role' => $data['RoleTitle'],
					'name' => $data['FullName']
				];
			}
		}

		return $this->getAPIResponse([
			'approvers' => $list
		], 200);
	}

	/**
	 * @param \SS_HTTPRequest $request
	 * @return \SS_HTTPResponse
	 */
	public function submit(SS_HTTPRequest $request) {

		if ($request->httpMethod() !== 'POST') {
			return $this->getAPIResponse(['message' => 'Method not allowed, requires POST'], 405);
		}

		$deployment = DNDeployment::get()->byId($request->postVar('id'));
		$errorResponse = $this->validateDeployment($deployment);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
		if ($errorResponse instanceof \SS_HTTPResponse) {
			return $errorResponse;
		}

		try {
			$deployment->getMachine()->apply(DNDeployment::TR_SUBMIT);
		} catch (\Exception $e) {
			return $this->getAPIResponse([
				'message' => $e->getMessage()
			], 400);
		}

		return $this->getAPIResponse([
			'message' => 'Deployment request has been submitted',
			'deployment' => $this->formatter->getDeploymentData($deployment)
<?php

/**
 * @property int $x
 * @property int $y
 * @property string $text
 */
class MyLabel
{
    private $properties;

    private $allowedProperties = array('x', 'y', 'text');

    public function __get($name)
    {
        if (isset($properties[$name]) && in_array($name, $this->allowedProperties)) {
            return $properties[$name];
        } else {
            return null;
        }
    }

    public function __set($name, $value)
    {
        if (in_array($name, $this->allowedProperties)) {
            $properties[$name] = $value;
        } else {
            throw new \LogicException("Property $name is not defined.");
        }
    }

}
		], 200);
	}

	/**
	 * @param \SS_HTTPRequest $request
	 * @return \SS_HTTPResponse
	 */
	public function cancel(SS_HTTPRequest $request) {

		if ($request->httpMethod() !== 'POST') {
			return $this->getAPIResponse(['message' => 'Method not allowed, requires POST'], 405);
		}

		$deployment = DNDeployment::get()->byId($request->postVar('id'));
		$errorResponse = $this->validateDeployment($deployment);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
		if ($errorResponse instanceof \SS_HTTPResponse) {
			return $errorResponse;
		}

		// @todo permission checking for cancelling an approval request
		try {
			$deployment->getMachine()->apply(DNDeployment::TR_NEW);
		} catch (\Exception $e) {
			return $this->getAPIResponse([
				'message' => $e->getMessage()
			], 400);
		}

		return $this->getAPIResponse([
			'message' => 'Deployment request has been cancelled',
			'deployment' => $this->formatter->getDeploymentData($deployment)
<?php

/**
 * @property int $x
 * @property int $y
 * @property string $text
 */
class MyLabel
{
    private $properties;

    private $allowedProperties = array('x', 'y', 'text');

    public function __get($name)
    {
        if (isset($properties[$name]) && in_array($name, $this->allowedProperties)) {
            return $properties[$name];
        } else {
            return null;
        }
    }

    public function __set($name, $value)
    {
        if (in_array($name, $this->allowedProperties)) {
            $properties[$name] = $value;
        } else {
            throw new \LogicException("Property $name is not defined.");
        }
    }

}
		], 200);
	}

	/**
	 * @param \SS_HTTPRequest $request
	 * @return \SS_HTTPResponse
	 */
	public function approve(SS_HTTPRequest $request) {
		if ($request->httpMethod() !== 'POST') {
			return $this->getAPIResponse(['message' => 'Method not allowed, requires POST'], 405);
		}

		$deployment = DNDeployment::get()->byId($request->postVar('id'));
		$errorResponse = $this->validateDeployment($deployment);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
		if ($errorResponse instanceof \SS_HTTPResponse) {
			return $errorResponse;
		}

		// ensure we have either bypass or approval permission of the logged in user
		if (
			!$this->project->allowed(self::ALLOW_APPROVAL_BYPASS, Member::currentUser())

			|| !$this->project->allowed(self::ALLOW_APPROVAL, Member::currentUser())

		) {
			return $this->getAPIResponse(['message' => 'You are not authorised to approve or bypass this deployment'], 403);
		}

		// check for specific permission depending on the current state of the deployment:
		// submitted => approved requires approval permissions
		// new => approved requires bypass permissions.
		if (

			$deployment->State === DNDeployment::STATE_SUBMITTED
			&& !$this->project->allowed(self::ALLOW_APPROVAL, Member::currentUser())

		) {
			return $this->getAPIResponse(['message' => 'You are not authorised to approve this deployment'], 403);
		}
		if (

			$deployment->State === DNDeployment::STATE_NEW
			&& !$this->project->allowed(self::ALLOW_APPROVAL_BYPASS, Member::currentUser())

		) {
			return $this->getAPIResponse(['message' => 'You are not authorised to bypass approval of this deployment'], 403);
		}

		try {
			$deployment->getMachine()->apply(DNDeployment::TR_APPROVE);
		} catch (\Exception $e) {
			return $this->getAPIResponse([
				'message' => $e->getMessage()
			], 400);
		}

		return $this->getAPIResponse([
			'message' => 'Deployment request has been approved',
			'deployment' => $this->formatter->getDeploymentData($deployment)
<?php

/**
 * @property int $x
 * @property int $y
 * @property string $text
 */
class MyLabel
{
    private $properties;

    private $allowedProperties = array('x', 'y', 'text');

    public function __get($name)
    {
        if (isset($properties[$name]) && in_array($name, $this->allowedProperties)) {
            return $properties[$name];
        } else {
            return null;
        }
    }

    public function __set($name, $value)
    {
        if (in_array($name, $this->allowedProperties)) {
            $properties[$name] = $value;
        } else {
            throw new \LogicException("Property $name is not defined.");
        }
    }

}
		], 200);
	}

	/**
	 * @param \SS_HTTPRequest $request
	 * @return \SS_HTTPResponse
	 */
	public function reject(SS_HTTPRequest $request) {
		if ($request->httpMethod() !== 'POST') {
			return $this->getAPIResponse(['message' => 'Method not allowed, requires POST'], 405);
		}

		$deployment = DNDeployment::get()->byId($request->postVar('id'));
		$errorResponse = $this->validateDeployment($deployment);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
		if ($errorResponse instanceof \SS_HTTPResponse) {
			return $errorResponse;
		}
		// reject permissions are the same as can approve
		if (!$this->project->allowed(self::ALLOW_APPROVAL, Member::currentUser())) {

			return $this->getAPIResponse(['message' => 'You are not authorised to reject this deployment'], 403);
		}

		try {
			$deployment->getMachine()->apply(DNDeployment::TR_REJECT);
		} catch (\Exception $e) {
			return $this->getAPIResponse([
				'message' => $e->getMessage()
			], 400);
		}

		return $this->getAPIResponse([
			'message' => 'Deployment request has been rejected',
			'deployment' => $this->formatter->getDeploymentData($deployment)
<?php

/**
 * @property int $x
 * @property int $y
 * @property string $text
 */
class MyLabel
{
    private $properties;

    private $allowedProperties = array('x', 'y', 'text');

    public function __get($name)
    {
        if (isset($properties[$name]) && in_array($name, $this->allowedProperties)) {
            return $properties[$name];
        } else {
            return null;
        }
    }

    public function __set($name, $value)
    {
        if (in_array($name, $this->allowedProperties)) {
            $properties[$name] = $value;
        } else {
            throw new \LogicException("Property $name is not defined.");
        }
    }

}
		], 200);
	}

	/**
	 * Check if a DNDeployment exists and do permission checks on it. If there is something wrong it will return
	 * an APIResponse with the error, otherwise null.
	 *
	 * @param \DNDeployment $deployment
	 *
	 * @return null|SS_HTTPResponse
	 */
	protected function validateDeployment(\DNDeployment $deployment) {

		if (!$deployment || !$deployment->exists()) {
			return $this->getAPIResponse(['message' => 'This deployment does not exist'], 404);
		}
		if ($deployment->EnvironmentID != $this->environment->ID) {
			return $this->getAPIResponse(['message' => 'This deployment does not belong to the environment'], 403);
		}
		if (!$deployment->canView()) {
			return $this->getAPIResponse(['message' => 'You are not authorised to view this deployment'], 403);
		}
		return null;
	}

	/**
	 * @return ArrayList
	 */
	protected function getApprovers() {
		$list = new ArrayList();
		if (self::$_cache_project_members === null) {
			self::$_cache_project_members = $this->project->listMembers();
class ParentClass {
    private $data = array();

    public function __call($method, array $args) {
        if (0 === strpos($method, 'get')) {
            return $this->data[strtolower(substr($method, 3))];
        }

        throw new \LogicException(sprintf('Unsupported method: %s', $method));
    }
}

/**
 * If this class knows which fields exist, you can specify the methods here:
 *
 * @method string getName()
 */
class SomeClass extends ParentClass { }
		}
		foreach (self::$_cache_project_members as $data) {
			$list->push(new ArrayData([
				'ID' => $member->ID,

				'Role' => $data['RoleTitle']
			]));
		}
		return $list;
	}

	/**
	 * @param string $name
	 * @return array
	 */
	public function getModel($name = '') {
		return [];
	}

	/**
	 * @param string $action
	 * @return string
	 */
	public function Link($action = '') {
		return \Controller::join_links($this->environment->Link(), self::ACTION_APPROVALS, $action);
	}

}


1			<?php
2
3			class ApprovalsDispatcher extends Dispatcher {
			0 ignored issues – show Coding Style introduced 2016-10-04 02:48 UTC by Report Bug Copy Issue Report The property $allowed_actions is not named in camelCase. This check marks property names that have not been written in camelCase. In camelCase names are written without any punctuation, the start of each new word being marked by a capital letter. Thus the name database connection string becomes `databaseConnectionString`. Loading history... Coding Style introduced 2016-10-04 02:48 UTC by Report Bug Copy Issue Report The property $action_types is not named in camelCase. This check marks property names that have not been written in camelCase. In camelCase names are written without any punctuation, the start of each new word being marked by a capital letter. Thus the name database connection string becomes `databaseConnectionString`. Loading history... Coding Style Compatibility introduced 2016-10-04 02:48 UTC by Report Bug Copy Issue Report PSR1 recommends that each class must be in a namespace of at least one level to avoid collisions. You can fix this by adding a namespace to your class: namespace YourVendor; class YourClass { } When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries. Loading history... Coding Style introduced 2016-10-04 03:13 UTC by Report Bug Copy Issue Report The property $_cache_project_members is not named in camelCase. This check marks property names that have not been written in camelCase. In camelCase names are written without any punctuation, the start of each new word being marked by a capital letter. Thus the name database connection string becomes `databaseConnectionString`. Loading history...
4
5			const ACTION_APPROVALS = 'approvals';
6
7			const ALLOW_APPROVAL = 'ALLOW_APPROVAL';
8
9			const ALLOW_APPROVAL_BYPASS = 'ALLOW_APPROVAL_BYPASS';
10
11			/**
12			* @var array
13			*/
14			private static $allowed_actions = [
			0 ignored issues – show Comprehensibility introduced 2016-10-05 01:39 UTC by Report Bug Copy Issue Report Consider using a different property name as you override a private property of the parent class. Loading history...
15			'approvers',
16			'submit',
17			'cancel',
18			'approve',
19			'reject'
20			];
21
22			private static $dependencies = [
23			'formatter' => '%$DeploynautAPIFormatter'
24			];
25
26			/**
27			* @var \DNProject
28			*/
29			protected $project = null;
30
31			/**
32			* @var \DNEnvironment
33			*/
34			protected $environment = null;
35
36			/**
37			* @var array
38			*/

silverstripe / deploynaut