实现公告功能

*后端部分

controllers/AdminController.php

@@ -2,6 +2,8 @@
 
 namespace app\controllers;
 
+use app\models\Announcements;
+use app\models\AnnouncementsSearch;
 use app\models\CollectionSearch;
 use app\models\CollectionTasks;
 use app\models\CollectionUploadedSearch;
@@ -23,6 +25,7 @@ use RuntimeException;
 use Throwable;
 use Yii;
 use yii\base\Exception;
+use yii\db\StaleObjectException;
 use yii\filters\AccessControl;
 use yii\filters\VerbFilter;
 use yii\web\Controller;
@@ -49,7 +52,8 @@ class AdminController extends Controller
                             'actions' => ['system', 'user', 'info', 'user-view', 'user-create', 'user-update',
                                 'user-delete', 'user-totpoff', 'user-pwdreset', 'login-log', 'access-log', 'collection-up-log',
                                 'share-manage', 'share-manage-view', 'share-manage-delete', 'collection-manage', 'collection-manage-view',
-                                'collection-manage-delete', 'notice-manage', 'sysinfo', 'get-sysinfo', 'ticket-manage', 'ticket-view', 'ticket-delete', 'ticket-reply'],
+                                'collection-manage-delete', 'notice-manage', 'sysinfo', 'get-sysinfo', 'ticket-manage', 'ticket-view', 'ticket-delete',
+                                'ticket-reply', 'announcements-manage', 'announcements-view', 'announcements-create', 'announcements-update', 'announcements-delete'],
                             'roles' => ['admin'], // only admin can do these
                         ]
                     ],
@@ -82,6 +86,11 @@ class AdminController extends Controller
                         'ticket-view' => ['GET'],
                         'ticket-delete' => ['POST'],
                         'ticket-reply' => ['POST'],
+                        'announcements-manage' => ['GET'],
+                        'announcements-view' => ['GET'],
+                        'announcements-create' => ['GET', 'POST'],
+                        'announcements-update' => ['GET', 'POST'],
+                        'announcements-delete' => ['POST'],
                     ],
                 ],
             ]
@@ -723,4 +732,113 @@ class AdminController extends Controller
         // 如果不是POST请求，返回一个错误响应
         return $this->asJson(['status' => 'error', 'message' => 'Invalid request']);
     }
+
+    /**
+     * Lists all Announcements models.
+     *
+     * @return string
+     */
+    public function actionAnnouncementsManage(): string
+    {
+        $searchModel = new AnnouncementsSearch();
+        $dataProvider = $searchModel->search($this->request->queryParams);
+
+        return $this->render('announcements_index', [
+            'searchModel' => $searchModel,
+            'dataProvider' => $dataProvider,
+        ]);
+    }
+
+    /**
+     * Displays a single Announcements model.
+     * @param int $id 公告ID
+     * @return string
+     * @throws NotFoundHttpException if the model cannot be found
+     */
+    public function actionAnnouncementsView(int $id): string
+    {
+        return $this->render('announcements_view', [
+            'model' => $this->findAnnouncementsModel($id),
+        ]);
+    }
+
+    /**
+     * Creates a new Announcements model.
+     * If creation is successful, the browser will be redirected to the 'view' page.
+     * @return string|Response
+     */
+    public function actionAnnouncementsCreate(): Response|string
+    {
+        $model = new Announcements();
+
+        if ($this->request->isPost) {
+            if ($model->load($this->request->post())) {
+                // set published_at to current time
+                $model->published_at = date('Y-m-d H:i:s');
+                if($model->save()){
+                    Yii::$app->session->setFlash('success', '公告发布成功');
+                    return $this->redirect(['announcements-view', 'id' => $model->id]);
+                }
+            }
+        } else {
+            $model->loadDefaultValues();
+        }
+
+        return $this->render('announcements_create', [
+            'model' => $model,
+        ]);
+    }
+
+    /**
+     * Updates an existing Announcements model.
+     * If update is successful, the browser will be redirected to the 'view' page.
+     * @param int $id 公告ID
+     * @return string|Response
+     * @throws NotFoundHttpException if the model cannot be found
+     */
+    public function actionAnnouncementsUpdate(int $id): Response|string
+    {
+        $model = $this->findAnnouncementsModel($id);
+
+        if ($this->request->isPost && $model->load($this->request->post()) && $model->save()) {
+            Yii::$app->session->setFlash('success', '公告修改成功');
+            return $this->redirect(['announcements-view', 'id' => $model->id]);
+        }
+
+        return $this->render('announcements_update', [
+            'model' => $model,
+        ]);
+    }
+
+    /**
+     * Deletes an existing Announcements model.
+     * If deletion is successful, the browser will be redirected to the 'index' page.
+     * @param int $id 公告ID
+     * @return Response
+     * @throws NotFoundHttpException if the model cannot be found
+     * @throws \Throwable
+     * @throws StaleObjectException
+     */
+    public function actionAnnouncementsDelete(int $id): Response
+    {
+        $this->findAnnouncementsModel($id)->delete();
+        Yii::$app->session->setFlash('success', '公告删除成功');
+        return $this->redirect(['announcements-manage']);
+    }
+
+    /**
+     * Finds the Announcements model based on its primary key value.
+     * If the model is not found, a 404 HTTP exception will be thrown.
+     * @param int $id 公告ID
+     * @return Announcements the loaded model
+     * @throws NotFoundHttpException if the model cannot be found
+     */
+    protected function findAnnouncementsModel(int $id): Announcements
+    {
+        if (($model = Announcements::findOne(['id' => $id])) !== null) {
+            return $model;
+        }
+
+        throw new NotFoundHttpException('The requested page does not exist.');
+    }
 }

controllers/SiteController.php

@@ -2,11 +2,14 @@
 
 namespace app\controllers;
 
+use app\models\Announcements;
 use app\models\EntryForm;
 use Yii;
 use yii\filters\AccessControl;
 use yii\web\Controller;
 use yii\filters\VerbFilter;
+use yii\web\NotFoundHttpException;
+use yii\web\Response;
 
 class SiteController extends Controller
 {
@@ -21,32 +24,35 @@ class SiteController extends Controller
                 'only' => ['logout'],
                 'rules' => [
                     [
-                        'actions' => ['logout'],
+                        'actions' => ['logout', 'get-announcement'],
                         'allow' => true,
                         'roles' => ['@'],
-                    ],
+                    ]
                 ],
             ],
             'verbs' => [
                 'class' => VerbFilter::class,
                 'actions' => [
                     'logout' => ['post'],
+                    'get-announcement' => ['get'],
                 ],
             ],
         ];
     }
+
     public function init(): void
     {
         parent::init();
 
         if (Yii::$app->user->can('admin')) {
             $this->layout = 'admin_main';
-        }elseif (Yii::$app->user->isGuest) {
+        } elseif (Yii::$app->user->isGuest) {
             $this->layout = 'guest_main';
         } else {
             $this->layout = 'main';
         }
     }
+
     /**
      * {@inheritdoc}
      */
@@ -70,9 +76,27 @@ class SiteController extends Controller
      */
     public function actionIndex(): string
     {
-        return $this->render('index');
+        if(Yii::$app->user->isGuest){
+            return $this->render('index');
+        }
+        //fetch latest 3 announcements
+        $latestAnnouncements = Announcements::fetchLatestAnnouncements();
+        return $this->render('index', [
+            'latestAnnouncements' => $latestAnnouncements
+        ]);
     }
 
+    /**
+     * @throws NotFoundHttpException
+     */
+    public function actionGetAnnouncement($id): ?Announcements
+    {
+        if (Yii::$app->request->isAjax) {
+            Yii::$app->response->format = Response::FORMAT_JSON;
+            return Announcements::findOne($id);
+        }
+        throw new NotFoundHttpException();
+    }
 
     public function actionEntry(): string
     {

models/Announcements.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace app\models;
+
+use Yii;
+use yii\db\ActiveRecord;
+
+/**
+ * This is the model class for table "announcements".
+ *
+ * @property int $id 公告ID
+ * @property string $title 标题
+ * @property string $content 内容
+ * @property string $published_at 发布时间
+ * @property string|null $updated_at 更新时间
+ */
+class Announcements extends ActiveRecord
+{
+    /**
+     * {@inheritdoc}
+     */
+    public static function tableName(): string
+    {
+        return 'announcements';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function rules(): array
+    {
+        return [
+            [['title', 'content', 'published_at'], 'required'],
+            [['content'], 'string'],
+            [['published_at', 'updated_at'], 'safe'],
+            [['title'], 'string', 'max' => 255],
+        ];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function attributeLabels(): array
+    {
+        return [
+            'id' => '公告ID',
+            'title' => '标题',
+            'content' => '内容',
+            'published_at' => '发布时间',
+            'updated_at' => '更新时间',
+        ];
+    }
+
+    /**
+     * give me the latest 3 announcements
+     * @return array
+     */
+    public static function fetchLatestAnnouncements(): array
+    {
+        return self::find()
+            ->orderBy(['updated_at' => SORT_DESC])
+            ->limit(3)
+            ->all();
+    }
+}

models/AnnouncementsSearch.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace app\models;
+
+use yii\base\Model;
+use yii\data\ActiveDataProvider;
+use app\models\Announcements;
+
+/**
+ * AnnouncementsSearch represents the model behind the search form of `app\models\Announcements`.
+ */
+class AnnouncementsSearch extends Announcements
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function rules(): array
+    {
+        return [
+            [['id'], 'integer'],
+            [['title', 'content', 'published_at', 'updated_at'], 'safe'],
+        ];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function scenarios(): array
+    {
+        // bypass scenarios() implementation in the parent class
+        return Model::scenarios();
+    }
+
+    /**
+     * Creates data provider instance with search query applied
+     *
+     * @param array $params
+     *
+     * @return ActiveDataProvider
+     */
+    public function search($params): ActiveDataProvider
+    {
+        $query = Announcements::find();
+
+        // add conditions that should always apply here
+
+        $dataProvider = new ActiveDataProvider([
+            'query' => $query,
+        ]);
+
+        $this->load($params);
+
+        if (!$this->validate()) {
+            // uncomment the following line if you do not want to return any records when validation fails
+            // $query->where('0=1');
+            return $dataProvider;
+        }
+
+        // grid filtering conditions
+        $query->andFilterWhere([
+            'id' => $this->id,
+            'published_at' => $this->published_at,
+            'updated_at' => $this->updated_at,
+        ]);
+
+        $query->andFilterWhere(['like', 'title', $this->title])
+            ->andFilterWhere(['like', 'content', $this->content]);
+
+        return $dataProvider;
+    }
+}