<?php

namespace App\Classes;

use Illuminate\Filesystem\FilesystemAdapter;

class MarkdownManager
{
    /**
     * Original markdown content
     */
    private ?string $originalContent = null;

    /**
     * Current markdown content
     */
    private ?string $content = null;

    public function __construct(protected string $filename, protected FilesystemAdapter $disk)
    {

    }

    /**
     * Return a boolean value indicating if the file actually exists on disk
     */
    public function exists()
    {
        return $this->disk->exists($this->filename);
    }

    /**
     * Load markdown file
     */
    public function load()
    {
        $content = $this->disk->get($this->filename);

        $this->set($content);
    }

    /**
     * Return current markdown content
     */
    public function get(): ?string
    {
        return $this->content;
    }

    /**
     * Set current markdown content
     */
    public function set(?string $content = null): void
    {
        $this->content = $content;
    }

    /**
     * Return a boolean value indicating if the file has changed since it was
     * loaded
     */
    public function isDirty(): bool
    {
        return $this->originalContent !== $this->content;
    }

    /**
     * Store file on disk
     */
    public function save(): bool
    {
        if (!$this->isDirty()) {
            return false;
        }

        $this->disk->put($this->filename, $this->content);

        $this->originalContent = $this->content;

        return true;
    }
}