<?php
namespace nulib\cache;

use nulib\app;
use nulib\db\CapacitorStorage;
use nulib\db\sqlite\SqliteStorage;
use nulib\php\func;

class cache {
  protected static ?string $dbfile = null;

  protected static function dbfile(): ?string {
    return self::$dbfile ??= app::get()->getVarfile("cache.db");
  }

  protected static ?CapacitorStorage $storage = null;

  protected static function storage(): CapacitorStorage {
    return self::$storage ??= new SqliteStorage(self::dbfile());
  }

  static function set_storage(CapacitorStorage $storage): CapacitorStorage {
    return self::$storage = $storage;
  }

  static function all(?iterable $rows, $cursorId=null): iterable {
    CacheChannel::verifix_id($cursorId);
    $file = "row-{$cursorId["group_id"]}-{$cursorId["id"]}";
    $cache = new CacheFile($file, function() use ($rows, $cursorId) {
      CacheChannel::with(self::storage(), null, $cursorId)->build($rows);
      return $cursorId;
    });
    return CacheChannel::with(self::storage(), null, $cache->get());
  }
}