Automate input download

FailedCode · FailedCode · commit bf142f82cebc · 2022-12-09T02:05:18.000+01:00
diff --git a/.env.dist b/.env.dist
@@ -0,0 +1,3 @@
+# Save this file as .env
+# Your adventofcode.com Session variable, needed if you want to download puzzle input automatically
+SESSION=
diff --git a/.gitignore b/.gitignore
@@ -1,3 +1,4 @@
 .idea
 vendor/
 input/*.txt
+.env
diff --git a/composer.json b/composer.json
@@ -6,5 +6,7 @@
             "Failedcode\\Aoc2022\\": "src/"
         }
     },
-    "require": {}
+    "require": {
+      "ext-curl": "*"
+    }
 }
diff --git a/src/Utils.php b/src/Utils.php
@@ -4,14 +4,82 @@
 
 class Utils
 {
-    public function loadInput($day, $type="day"): array
+    protected array $env = [];
+
+    /**
+     * @param int $day
+     * @param string $type
+     * @return array
+     * @throws \Exception
+     */
+    public function loadInput($day, $type = "day"): array
     {
         $filePath = "input/{$type}{$day}.txt";
         if (!file_exists($filePath)) {
-            // TODO: download input
-            throw new \Exception("Input missing: '$filePath'", 1670457206416);
+            if ($this->downloadInput($day, $filePath) === false) {
+                throw new \Exception("Input missing: '$filePath'", 1670457206416);
+            }
         }
         $content = file_get_contents($filePath);
         return explode("\n", $content);
     }
+
+    /**
+     * @param int $day
+     * @param string $filePath
+     * @return bool
+     * @throws \Exception
+     */
+    protected function downloadInput($day, $filePath): bool
+    {
+        if (empty($this->env)) {
+            $this->loadDotEnv();
+        }
+        if (!isset($this->env["SESSION"])) {
+            return false;
+        }
+
+        $curl = \curl_init();
+        $options = [
+            CURLOPT_URL => "https://adventofcode.com/2022/day/$day/input",
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_COOKIE => "session=" . $this->env["SESSION"],
+            CURLOPT_USERAGENT => "https://github.com/FailedCode/adventofcode-2022-php by xeres666@googlemail.com",
+        ];
+        \curl_setopt_array($curl, $options);
+        $result = \curl_exec($curl);
+        $err = \curl_errno($curl);
+        $errmsg = \curl_error($curl);
+        \curl_close($curl);
+
+        if ($err) {
+            throw new \Exception("Error downloading input for day {$day}:\n{$errmsg}\n", 1670546029246);
+        }
+        return file_put_contents($filePath, $result) !== false;
+    }
+
+    /**
+     * @return void
+     */
+    protected function loadDotEnv()
+    {
+        $envFile = __dir__ . '/../.env';
+        if (!file_exists($envFile)) {
+            return;
+        }
+        $lines = array_filter(explode("\n", file_get_contents($envFile)), 'strlen');
+        foreach ($lines as $line) {
+            // skip comments
+            if (preg_match('~^\s*#~', $line)) {
+                continue;
+            }
+            if (strpos($line, '=') !== false) {
+                list($var, $value) = explode('=', $line, 2);
+                $var = strtoupper(trim($var));
+                if (strlen($var) > 1) {
+                    $this->env[$var] = $value;
+                }
+            }
+        }
+    }
 }

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+# Save this file as .env`
	`2`	`+# Your adventofcode.com Session variable, needed if you want to download puzzle input automatically`
	`3`	`+SESSION=`
-Original file line number
+Diff line change
@@ @@ -1,3 +1,4 @@ @@
 .idea
 vendor/
 input/*.txt
 +.env
Original file line number	Diff line number	Diff line change
`@@ -6,5 +6,7 @@`
`6`	`6`	`"Failedcode\\Aoc2022\\": "src/"`
`7`	`7`	`}`
`8`	`8`	`},`
`9`		`- "require": {}`
	`9`	`+ "require": {`
	`10`	`+ "ext-curl": "*"`
	`11`	`+ }`
`10`	`12`	`}`