Before running parse operation on search results page it checks now if there are any books to parse.

README.md

@@ -0,0 +1,44 @@
+## Installation 
+
+Place this in the composer.json.
+
+```composer 
+{
+  "repositories": [{
+    "type": "composer",
+    "url": "https://satis.techtube.pl"
+  }]
+}
+```
+Then execute
+
+```bash
+composer require techtube/bookinfo:"1.0.4"
+```
+
+## Usage
+
+To get information about the book by the link:
+
+```php
+<?php
+
+include_once 'vendor/autoload.php';
+
+$searcher = new \Techtube\Bookinfo\BookFinder();
+$data = $searcher->byUrl('https://lubimyczytac.pl/ksiazka/5008411/oni');
+
+print_r($data);
+```
+
+To search the book by phrase:
+```php
+<?php
+
+include_once 'vendor/autoload.php';
+
+$searcher = new \Techtube\Bookinfo\BookFinder();
+$data = $searcher->search('jack reacher');
+
+print_r($data);
+```

src/DataParser.php

@@ -49,13 +49,15 @@ class DataParser
         $books = $document->find('#search .authorAllBooks__single');
 
         $booksInfo = [];
-        foreach ($books as $book) {
-            $bookInfo = new Info();
-            $bookInfo->title = trim($book->first('.authorAllBooks__singleTextTitle')->text());
-            $bookInfo->author = trim($book->first('.authorAllBooks__singleTextAuthor')->text());
-            $bookInfo->url = $book->first('button[data-book-url]')->getAttribute('data-book-url');
-            $bookInfo->cover_url = $this->generateCoverUrls($book->first('.img-fluid')->getAttribute('data-src'));
-            $booksInfo[] = $bookInfo;
+        if ($document->has('#searchksiazki')) {
+            foreach ($books as $book) {
+                $bookInfo = new Info();
+                $bookInfo->title = trim($book->first('.authorAllBooks__singleTextTitle')->text());
+                $bookInfo->author = trim($book->first('.authorAllBooks__singleTextAuthor')->text());
+                $bookInfo->url = $book->first('button[data-book-url]')->getAttribute('data-book-url');
+                $bookInfo->cover_url = $this->generateCoverUrls($book->first('.img-fluid')->getAttribute('data-src'));
+                $booksInfo[] = $bookInfo;
+            }
         }
         return $booksInfo;
     }