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Introduce ApiV1(Contacts/Contactgroups)Controller
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sukhwinder33445 committed Jun 11, 2024
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350 changes: 350 additions & 0 deletions application/controllers/ApiV1ContactgroupsController.php
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<?php

/* Icinga Notifications Web | (c) 2024 Icinga GmbH | GPLv2 */

namespace Icinga\Module\Notifications\Controllers;

use Icinga\Exception\Http\HttpBadRequestException;
use Icinga\Exception\Http\HttpException;
use Icinga\Module\Notifications\Common\Database;
use Icinga\Util\Environment;
use Icinga\Util\Json;
use ipl\Sql\Compat\FilterProcessor;
use ipl\Sql\Select;
use ipl\Web\Compat\CompatController;
use ipl\Web\Filter\QueryString;
use ipl\Web\Url;

class ApiV1ContactgroupsController extends CompatController
{
private const ENDPOINT = 'notifications/api/v1/contactgroups';

/**
* @return void
*/
public function indexAction(): void
{
$this->assertPermission('notifications/api/v1');

$request = $this->getRequest();
if (! $request->isApiRequest()) {
$this->httpBadRequest('No API request');
}

$method = $request->getMethod();
if (in_array($method, ['POST', 'PUT'])
&& (! preg_match('/([^;]*);?/', $request->getHeader('Content-Type'), $matches)

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|| $matches[1] !== 'application/json'
)
) {
$this->httpBadRequest('No JSON content');
}

$results = [];
$responseCode = 200;
$db = Database::get();
$identifier = $request->getParam('identifier');
// TODO: Remove rawurldecode(). Only added to test, bcz phpstorm's http client encodes the params
$queryString = rawurldecode(Url::fromRequest()->getQueryString());
$filter = FilterProcessor::assembleFilter(QueryString::parse($queryString));

switch ($method) {
case 'GET':
$stmt = (new Select())
->distinct()
->from('contactgroup cg')
->columns([
'contactgroup_id' => 'cg.id',
'id' => 'cg.external_uuid',
'name'
]);

if ($identifier !== null) {
$stmt->where(['external_uuid = ?' => $identifier]);
$result = $db->fetchOne($stmt);

if ($result === false) {
$this->httpNotFound('Contactgroup not found');
}

$users = $this->fetchUserIdentifiers($result->contactgroup_id);

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if ($users) {
$result->users = $users;

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}

unset($result->contactgroup_id);

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$results[] = $result;

break;
}

if ($filter !== null) {
$stmt->where($filter);
}

$stmt->limit(500);
$offset = 0;

ob_end_clean();
Environment::raiseExecutionTime();

$this->getResponse()
->setHeader('Content-Type', 'application/json')
->setHeader('Cache-Control', 'no-store')
->sendResponse();

echo '[';

$res = $db->select($stmt->offset($offset));
do {
foreach ($res as $i => $row) {
$users = $this->fetchUserIdentifiers($row->contactgroup_id);

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if ($users) {
$row->users = $users;

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}

if ($i > 0 || $offset !== 0) {
echo ",\n";
}

unset($row->contactgroup_id);

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echo Json::sanitize($row);
}

$offset += 500;
$res = $db->select($stmt->offset($offset));
} while ($res->rowCount());

echo ']';

exit;
case 'POST':
if ($filter !== null) {
$this->httpBadRequest('Cannot filter on POST');
}

$data = $request->getPost();

$this->assertValidData($data);

$db->beginTransaction();

if ($identifier === null) {
$identifier = $data['id'];

if ($this->getContactgroupId($identifier) !== null) {

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throw new HttpException('422', 'Contactgroup already exists');

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}

$this->addContactgroup($data);
} else {
$contactgroupId = $this->getContactgroupId($identifier);

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if ($contactgroupId === null) {
$this->httpNotFound('Contactgroup not found');
}

if ($identifier === $data['id']) {
throw new HttpException('422', 'Contactgroup already exists');
}

$identifier = $data['id'];
$this->removeContactgroup($contactgroupId);
$this->addContactgroup($data);
}

$db->commitTransaction();

$this->getResponse()->setHeader('Location', self::ENDPOINT . '/' . $identifier);
$responseCode = 201;

break;
case 'PUT':
if ($identifier === null) {
$this->httpBadRequest('Identifier is required');
}

$data = $request->getPost();

$this->assertValidData($data);

if ($identifier !== $data['id']) {
$this->httpBadRequest('Identifier mismatch');
}

$db->beginTransaction();

$contactgroupId = $this->getContactgroupId($identifier);
if ($contactgroupId !== null) {
$db->update('contactgroup', [
'name' => $data['name'],
], ['id = ?' => $contactgroupId]);

$db->delete('contactgroup_member', ['contactgroup_id = ?' => $identifier]);

if (! empty($data['users'])) {
$this->assertUsersExist($data['users']);

foreach ($data['users'] as $userId) {
$db->insert('contactgroup_member', [
'contactgroup_id' => $identifier,
'contact_id' => $userId
]);
}
}

$responseCode = 204;
} else {
$this->addContactgroup($data);
$responseCode = 201;
}

$db->commitTransaction();

break;
case 'DELETE':
if ($identifier === null) {
$this->httpBadRequest('Identifier is required');
}

$db->beginTransaction();

$contactgroupId = $this->getContactgroupId($identifier);
if ($contactgroupId === null) {
$this->httpNotFound('Contactgroup not found');
}

$this->removeContactgroup($contactgroupId);

$db->commitTransaction();

$responseCode = 204;

break;
default:
$this->httpBadRequest('Invalid method');
}

$this->getResponse()
->setHttpResponseCode($responseCode)
->json()
->setSuccessData($results)
->sendResponse();
}

/**
* Fetch the user(contact) identifiers of the contactgroup with the given id
*
* @param int $contactgroupId
*
* @return ?string[]
*/
private function fetchUserIdentifiers(int $contactgroupId): ?array
{
$users = Database::get()->fetchCol(
(new Select())
->from('contactgroup_member cgm')
->columns('co.external_uuid')
->joinLeft('contact co', 'co.id = cgm.contact_id')
->where(['cgm.contactgroup_id = ?' => $contactgroupId])
->groupBy('co.external_uuid')
);

return ! empty($users) ? $users : null;
}

/**
* Assert that the given user IDs exist
*
* @param array $userIds
*
* @throws HttpException if a group does not exist
*/
private function assertUsersExist(array $userIds): void
{
$existingUserIds = Database::get()->fetchCol(
(new Select())
->from('contact')
->columns('id')
->where(['id IN (?)' => $userIds])
);

if (count($existingUserIds) !== count($userIds)) {
throw new HttpException('404', 'Undefined user identifier given');
}
}

/**
* Get the contactgroup id with the given identifier
*
* @param string $identifier
*
* @return ?int Returns null, if contact does not exist
*/
private function getContactgroupId(string $identifier): ?int
{
$contactgroup = Database::get()->fetchOne(
(new Select())
->from('contactgroup')
->columns('id')
->where(['external_uuid = ?' => $identifier])
);

return $contactgroup->id ?? null;
}

/**
* Add a new contactgroup with the given data
*
* @param array $data
*
* @throws HttpException if a user does not exist
*/
private function addContactgroup(array $data): void
{
$db = Database::get();
$db->insert('contactgroup', [
'name' => $data['name'],
'external_uuid' => $data['id']
]);

$id = $db->lastInsertId();

if (! empty($data['users'])) {
$this->assertUsersExist($data['users']);
foreach ($data['users'] as $contactId) {
$db->insert('contactgroup_member', [
'contactgroup_id' => $id,
'contact_id' => $contactId
]);
}
}
}

/**
* Remove the contactgroup with the given id
*
* @param int $id
*/
private function removeContactgroup(int $id): void
{
$db = Database::get();

$db->delete('contactgroup_member', ['contactgroup_id = ?' => $id]);
$db->delete('contactgroup', ['id = ?' => $id]);
}

/**
* Assert that the given data contains the required fields
*
* @param array $data
*
* @throws HttpBadRequestException
*/
private function assertValidData(array $data): void
{
if (! isset($data['id'], $data['name'])) {
$this->httpBadRequest('missing required fields');
}
}
}
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