facut pana la video 7

2023-05-10 00:47:48 +03:00
parent 1abdc313f4
commit 90f12ab916
40 changed files with 1644 additions and 41 deletions
@@ -0,0 +1,78 @@
+<?php
+
+namespace app\core;
+
+class Database{
+    public \PDO $pdo;
+
+    public function __construct(array $config){
+        $dsn = $config['dsn'] ?? '';
+        $user = $config['user'] ?? '';
+        $password = $config['password'] ?? '';
+        $this->pdo = new \PDO($dsn, $user, $password);
+        $this->pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
+    }
+
+    public function applyMigrations(){
+        $this->createMigrationsTable();
+        $appliedMigrations = $this->getAppliedMigrations();
+        
+        $newMigrations = [];
+        $files = scandir(Application::$ROOT_DIR.'/migrations');
+        $toApplyMigrations = array_diff($files, $appliedMigrations);
+
+        foreach($toApplyMigrations as $migration){
+            if($migration === '.' || $migration === '..'){
+                continue;
+            }
+
+            require_once Application::$ROOT_DIR.'/migrations/'.$migration;
+            $className = pathinfo($migration, PATHINFO_FILENAME);
+
+            $instance = new $className();
+            $this->log("Applying migration $migration" . PHP_EOL);
+            $instance->up();
+            $this->log("Applied migration $migration" . PHP_EOL);
+
+            $newMigrations[] = $migration;
+        }
+
+        if(!empty($newMigrations)){
+            $this->saveMigrations($newMigrations);
+        }else{
+            $this->log('All migrations are applied');
+        }
+    }
+
+    public function createMigrationsTable(){
+        $this->pdo->exec("
+        CREATE TABLE IF NOT EXISTS migrations (
+            id INT AUTO_INCREMENT,
+            migration varchar(255),
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            PRIMARY KEY (id)
+            ) 
+         ENGINE=INNODB;");
+    }
+
+    public function getAppliedMigrations(){
+        $statement = $this->pdo->prepare("SELECT migration FROM migrations");
+        $statement->execute();
+
+        return $statement->fetchAll(\PDO::FETCH_COLUMN);
+    }
+
+    public function saveMigrations(array $migrations){
+        $str = implode(",", array_map(fn($m) => "('$m')", $migrations));
+        $statement = $this->pdo->prepare("INSERT INTO migrations (migration) VALUES $str");
+        $statement->execute();
+    }
+
+    public function prepare($sql){
+        return $this->pdo->prepare($sql);
+    }
+
+    protected function log($message){
+        echo '['.date('Y-m-d H:i:s').'] - '.$message.PHP_EOL;
+    }
+}