Modify Model become abstract, create database interactions and do test.

App/Models/Post.php

@@ -0,0 +1,153 @@
+<?php
+namespace App\Models;
+
+class Post extends \Core\Model
+{
+    public function __construct()
+    {
+        $this->createTable(
+            'pengumuman',
+            [
+                'id int(3) NOT NULL AUTO_INCREMENT',
+                'category int(3) NOT NULL',
+                'created_at timestamp DEFAULT CURRENT_TIMESTAMP',
+                'expired_at timestamp NOT NULL',
+                'creator int(3) NOT NULL',
+                'edited_at timestamp',
+                'editor timestamp',
+                'content varchar(255) NOT NULL',
+                'PRIMARY KEY (id)'
+            ]
+        );
+    }
+
+    public function showAll()
+    {
+        try {
+            $db = static::connectDB();
+
+            $sql = "SELECT * FROM pengumuman ORDER BY created_at";
+
+            if ($stmt = $db->query($sql)) {
+                $result = $stmt->fetchAll(\PDO::FETCH_ASSOC);
+                return true;
+            }
+            return false;
+        } catch (PDOException $e) {
+            echo $e->getMessage();
+        }
+    }
+
+    public function showSingle($id)
+    {
+        try {
+            $db = static::connectDB();
+
+            $sql = "SELECT * FROM pengumuman WHERE id = ?";
+
+            $query = $db->prepare($sql);
+
+            if ($query->execute([$id])) {
+                if ($query->rowCount() === 1) {
+                    $result = $query->fetchAll(\PDO::FETCH_ASSOC);
+                    // For tests
+                    return true;
+                }
+            }
+            return false;
+        } catch (PDOException $e) {
+            echo $e->getMessage();
+        }
+    }
+
+    public function entry($fields, $vals)
+    {
+        if (count($fields) && count($vals) && count($fields) === count($vals)) {
+            $keys = '`'.implode('`, `', $fields).'`';
+
+            $x = 1;
+            $values = '';
+            foreach ($vals as $val) {
+                $values .= '?';
+                if ($x < count($vals)) {
+                    $values .= ', ';
+                }
+                $x++;
+            }
+
+            try {
+                $db = static::connectDB();
+
+                $sql = "INSERT INTO pengumuman ({$keys}) VALUES ({$values})";
+
+                $query = $db->prepare($sql);
+
+                $x = 1;
+
+                foreach ($vals as $val) {
+                    $query->bindValue($x, urldecode($val));
+                    $x++;
+                }
+
+                if ($query->execute()) {
+                    return true;
+                }
+                return false;
+            } catch (PDOException $e) {
+                echo $e->getMessage();
+            }
+        }
+    }
+
+    public function update($args, $id)
+    {
+        if (count($args)) {
+            $keys = array_keys($args);
+
+            $fields = [];
+            foreach ($keys as $key) {
+                $fields[] = $key.' = ?';
+            }
+
+            try {
+                $db = static::connectDB();
+
+                $sql = "UPDATE pengumuman SET ".implode(', ', $fields)." WHERE id = ?";
+
+                $query = $db->prepare($sql);
+                $x = 1;
+                foreach ($args as $value) {
+                    $query->bindValue($x, $value);
+                    $x++;
+                }
+                $query->bindValue($x, $id);
+
+                if ($query->execute()) {
+                    return true;
+                }
+                return false;
+            } catch (PDOException $e) {
+                echo $e->getMessage();
+            }
+        }
+    }
+
+    public function delete($id)
+    {
+        try {
+            $db = static::connectDB();
+
+            $sql = "DELETE FROM pengumuman WHERE id = ?";
+
+            $query = $db->prepare($sql);
+
+            if ($query->execute([$id])) {
+                return true;
+            }
+            return false;
+        } catch (PDOException $e) {
+            echo $e->getMessage();
+        }
+
+    }
+}

Core/Model.php

@@ -3,7 +3,7 @@ namespace Core;
 
 use App\Config;
 
-class Model
+abstract class Model
 {
     protected static $dsn;
 
@@ -24,20 +24,9 @@ class Model
         }
     }
 
-    public function createTable()
+    public function createTable($table, $fields = [])
     {
-        $sql = "CREATE TABLE IF NOT EXISTS pengumuman (
+        $sql = "CREATE TABLE IF NOT EXISTS {$table} (".implode(',', $fields).") ENGINE=InnoDB DEFAULT CHARSET=utf8;";
-        	id			int(3)			NOT NULL	AUTO_INCREMENT,
-        	category	int(3)        	NOT NULL,
-        	created_at	timestamp		NOT NULL	DEFAULT	CURRENT_TIMESTAMP,
-            expire_at   timestamp       NOT NULL,
-            creator     int(3)          NOT NULL,
-            edited_at   timestamp,
-            editor      int(3),
-            content     varchar(255)    NOT NULL,
-
-        	PRIMARY KEY (id)
-        ) ENGINE=InnoDB	DEFAULT CHARSET=utf8;";
 
         $db = static::connectDB();
         $query = $db->prepare($sql);
@@ -48,9 +37,9 @@ class Model
         return false;
     }
 
-    public function dropTable()
+    public function dropTable($table)
     {
-        $sql = "DROP TABLE IF EXISTS pengumuman";
+        $sql = "DROP TABLE IF EXISTS {$table}";
 
         $db = static::connectDB();
         $query = $db->prepare($sql);

_tests/unit/PostTest.php

@@ -0,0 +1,31 @@
+<?php
+namespace App\Models;
+
+class PostTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     *
+     * @test
+     */
+    public function showDataSuccess()
+    {
+        $post = new Post();
+
+        $this->assertTrue($post->showAll());
+
+        $fields = ['category', 'expired_at', 'creator', 'content'];
+        $values = ['3', '2017-09-02', '2', 'barbarbarbarbarbarbar!'];
+
+        $this->assertTrue($post->entry($fields, $values));
+
+        $args = ['category' => 5, 'content' => 'foofoofoofoo!'];
+
+        $this->assertTrue($post->update($args, 1));
+
+        $this->assertTrue($post->showSingle(1));
+
+        $this->assertTrue($post->delete(1));
+
+        $this->assertTrue($post->dropTable('pengumuman'));
+    }
+}