add admin section to select groups allowed to print

appinfo/info.xml

@@ -28,6 +28,10 @@
     <bugs>https://github.com/e-alfred/nextcloud-printer/issues</bugs>
     <screenshot>https://github.com/e-alfred/nextcloud-printer/raw/master/screenshots/printer.gif</screenshot>
          <dependencies>
-        <nextcloud min-version="16" max-version="19" />
+        <nextcloud min-version="17" max-version="19" />
     </dependencies>
+	<settings>
+		<admin>OCA\Printer\Settings\Admin\AllowedGroups</admin>
+		<admin-section>OCA\Printer\Settings\Admin\Section</admin-section>
+	</settings>
 </info>

css/admin.css

@@ -0,0 +1,3 @@
+#printer_admin input {
+    vertical-align: middle;
+}

js/admin.js

@@ -0,0 +1,65 @@
+let elements = []
+
+const selector = '#printer-message';
+
+const appConfig = (name, value, callbacks) => {
+    OCP.AppConfig.setValue('printer', name, value, callbacks)
+}
+
+const saveSettings = (key) => {
+    const element = elements.get(key)
+    let value
+    let name
+
+    if (jQuery(element).is('[data-checkbox]')) {
+        name = jQuery(element).attr('data-name')
+        const inputs = jQuery('input[name="' + name + '[]"]:checked')
+        value = []
+
+        inputs.each((i, v) => {
+            value.push(v.value)
+        })
+
+        value = JSON.stringify(value)
+    } else {
+        name = jQuery(element).attr('name')
+        value = jQuery(element).val()
+    }
+
+    const size = elements.length
+
+    if (name === 'cache') {
+        ++value
+    }
+
+    const callbacks = {
+        success: () => {
+            OC.msg.finishedSuccess(
+                selector,
+                t('printer', (key + 1) + '/' + size)
+            )
+
+            if (key < size - 1) {
+                saveSettings(++key)
+            } else {
+                OC.msg.finishedSuccess(selector, t('printer', 'Saved'))
+            }
+        },
+        error: () => {
+            OC.msg.finishedError(selector, t('printer', 'Error while saving "' + element + '"'))
+        }
+    }
+
+    appConfig(name, value, callbacks)
+}
+
+jQuery(document).ready(() => {
+    elements = jQuery('.printer-setting')
+
+    jQuery('#printer-save').on('click', (event) => {
+        event.preventDefault()
+        OC.msg.startSaving(selector)
+
+        saveSettings(0)
+    });
+});

lib/Config.php

@@ -0,0 +1,66 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\Printer;
+
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\IConfig;
+use OCP\IGroupManager;
+use OCP\IUser;
+use OCP\Security\ISecureRandom;
+
+class Config
+{
+    /**
+     * @var IConfig
+     */
+    protected $config;
+
+    /**
+     * @var ITimeFactory
+     */
+    protected $timeFactory;
+
+    /**
+     * @var IGroupManager
+     */
+    private $groupManager;
+
+    /**
+     * @var ISecureRandom
+     */
+    private $secureRandom;
+
+    public function __construct(IConfig $config, ISecureRandom $secureRandom, IGroupManager $groupManager, ITimeFactory $timeFactory)
+    {
+        $this->config = $config;
+        $this->secureRandom = $secureRandom;
+        $this->groupManager = $groupManager;
+        $this->timeFactory = $timeFactory;
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getAllowedGroupIds(): array
+    {
+        $groups = $this->config->getAppValue('printer', 'allowed_groups', '[]');
+        $groups = json_decode($groups, true);
+
+        return \is_array($groups) ? $groups : [];
+    }
+
+    public function isDisabledForUser(IUser $user): bool
+    {
+        $allowedGroups = $this->getAllowedGroupIds();
+
+        if (empty($allowedGroups)) {
+            return false;
+        }
+
+        $userGroups = $this->groupManager->getUserGroupIds($user);
+
+        return empty(array_intersect($allowedGroups, $userGroups));
+    }
+}

lib/Controller/PrinterController.php

@@ -2,11 +2,12 @@
 
 namespace OCA\Printer\Controller;
 
+use OCA\Printer\Config;
+use OCA\Printer\Service\Printer;
 use OCP\AppFramework\Controller;
 use OCP\AppFramework\Http\JSONResponse;
 use OCP\IRequest;
-use Symfony\Component\Process\Process;
-use OCA\Printer\Service\Printer;
+use OCP\IUserSession;
 use Symfony\Component\Process\Exception\ProcessFailedException;
 
 class PrinterController extends Controller
@@ -21,12 +22,18 @@ class PrinterController extends Controller
      */
     protected $printer;
 
-    public function __construct(string $appName, IRequest $request, Printer $printer)
+    /**
+     * @var Config
+     */
+    protected $config;
+
+    public function __construct(string $appName, IRequest $request, Printer $printer, Config $config)
     {
         parent::__construct($appName, $request);
 
         $this->language = \OC::$server->getL10N('printer');
         $this->printer = $printer;
+        $this->config = $config;
     }
 
     /**
@@ -46,6 +53,17 @@ class PrinterController extends Controller
             'msg' => $this->language->t('Print failed'),
         ];
 
+        $notAllowed = [
+            'response' => 'error',
+            'msg' => $this->language->t('User not allowed'),
+        ];
+
+        $user = \OC::$server[IUserSession::class]->getUser();
+
+        if (!$user || $this->config->isDisabledForUser($user)) {
+            return new JSONResponse($notAllowed);
+        }
+
         if (!$this->printer->isValidOrirentation($orientation)) {
             return new JSONResponse($error);
         }

lib/Settings/Admin/AllowedGroups.php

@@ -0,0 +1,63 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\Printer\Settings\Admin;
+
+use OCA\Printer\Config;
+use OCP\AppFramework\Http\TemplateResponse;
+use OCP\IGroupManager;
+use OCP\IInitialStateService;
+use OCP\Settings\ISettings;
+
+class AllowedGroups implements ISettings
+{
+    /**
+     * @var Config
+     */
+    private $config;
+
+    /**
+     * @var IInitialStateService
+     */
+    private $initialStateService;
+
+    /**
+     * @var IGroupManager
+     */
+    private $groupManager;
+
+    public function __construct(Config $config, IInitialStateService $initialStateService, IGroupManager $groupManager)
+    {
+        $this->config = $config;
+        $this->initialStateService = $initialStateService;
+        $this->groupManager = $groupManager;
+    }
+
+    public function getForm(): TemplateResponse
+    {
+        $this->initialStateService->provideInitialState(
+            'printer',
+            'allowed_groups',
+            $this->config->getAllowedGroupIds()
+        );
+
+        $groups = $this->groupManager->search('', 100);
+        $allowedGroups = $this->config->getAllowedGroupIds();
+
+        return new TemplateResponse('printer', 'settings/admin/allowed-groups', [
+            'groups' => $groups,
+            'allowedGroups' => $allowedGroups,
+        ], '');
+    }
+
+    public function getSection(): string
+    {
+        return 'printer';
+    }
+
+    public function getPriority(): int
+    {
+        return 10;
+    }
+}

lib/Settings/Admin/Section.php

@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\Printer\Settings\Admin;
+
+use OCP\IL10N;
+use OCP\IURLGenerator;
+use OCP\Settings\IIconSection;
+
+class Section implements IIconSection
+{
+    /**
+     * @var IL10N
+     */
+    private $l;
+
+    /**
+     * @var IURLGenerator
+     */
+    private $url;
+
+    public function __construct(IURLGenerator $url, IL10N $l)
+    {
+        $this->url = $url;
+        $this->l = $l;
+    }
+
+    public function getIcon(): string
+    {
+        return $this->url->imagePath('spreed', 'app-dark.svg');
+    }
+
+    public function getID(): string
+    {
+        return 'printer';
+    }
+
+    public function getName(): string
+    {
+        return $this->l->t('Printer');
+    }
+
+    public function getPriority(): int
+    {
+        return 70;
+    }
+}

templates/settings/admin/allowed-groups.php

@@ -0,0 +1,38 @@
+<?php
+style('printer', 'admin');
+script('printer', 'admin');
+?>
+<div id="printer_admin">
+    <div class="section">
+        <h2><?php p($l->t('Limit to groups')) ?></h2>
+        <p class="settings-hint">
+            <?php p($l->t('When at least one group is selected, only people of the listed groups can print.')); ?>
+        </p>
+
+        <ul class="printer-setting" data-name="allowed_groups" data-checkbox>
+            <?php foreach ($_['groups'] as $group): ?>
+                <li>
+                    <input
+                        type="checkbox"
+                        id="allowed_group_<?php echo $group->getGid() ?>"
+                        name="allowed_groups[]"
+                        value="<?php p($group->getGid()) ?>"
+                        <?php if (in_array($group->getGid(), $_['allowedGroups'])): ?>
+                            checked
+                        <?php endif ?>
+                    >
+
+                    <label for="allowed_group_<?php echo $group->getGid() ?>">
+                        <?php p($group->getDisplayName()) ?>
+                    </label>
+                </li>
+            <?php endforeach ?>
+        </ul>
+
+        <button id="printer-save" class="btn btn-info">
+            <?php p($l->t('Save')); ?>
+        </button>
+
+        <span id="printer-message" class="msg"></span>
+    </div>
+</div>