1 files changed, 41 insertions, 0 deletions
diff --git a/src/HistoryStorage.php b/src/HistoryStorage.php
new file mode 100644
index 0000000..30d9ace
--- /dev/null
+++ b/src/HistoryStorage.php
@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace TCB;
+
+final class HistoryStorage
+{
+    public function __construct(
+        public array $playlists,
+        public array $history,
+        private readonly string $filename,
+    ) {}
+
+    static public function load(string $filename): self
+    {
+        $storage = is_readable($filename)
+            ? json_decode(file_get_contents($filename), true)
+            : [];
+
+        return new self(
+            playlists: $storage['playlists'] ?? [],
+            history: $storage['history'] ?? [],
+            filename: $filename,
+        );
+    }
+
+    public function save(): void
+    {
+        file_put_contents($this->filename, json_encode($this, JSON_PRETTY_PRINT));
+    }
+
+    public function saveSong(array $song): void
+    {
+        $this->history[$song['id']] = [
+            'timestamp' => time(),
+            'details' => $song,
+        ];
+        $this->save();
+    }
+}