update execute in filesDiffCommand

Author: Alexsey-VR

src/FilesDiffCommand.php

@@ -5,15 +5,21 @@
 class FilesDiffCommand implements CommandInterface
 {
     private FileReaderInterface $fileReader;
-    private array $filesData;
-    private array $file1Content;
-    private array $file2Content;
-    private array $filesDiffContent;
+    private array $filesPaths;
+    private array $filesDataItems;
+    private array $filesDiffs;
+    private string $filesDiffsString;
+    private array $filesContent;
+    private string $filesContentString;
+
+    private function constructContent($accum, $item)
+    {
+        return $accum .= "\n    " . $item;
+    }
 
     public function __construct()
     {
-        $this->file1Content = [];
-        $this->file2Content = [];
+        $this->filesDataItems = [];
     }
 
     public function setFileReader(FileReaderInterface $fileReader): CommandInterface
@@ -23,27 +29,66 @@ public function setFileReader(FileReaderInterface $fileReader): CommandInterface
         return $this;
     }
 
-    public function setFileNames(CommandInterface $command): CommandInterface
+    public function execute(CommandInterface $command = null): CommandInterface
     {
-        $this->filesData = $command->getFileNames();
+        if (!is_null($command)) {
+            $this->filesPaths = [
+                $command->getFileNames()['FILE1'],
+                $command->getFileNames()['FILE2']
+            ];
 
-        return $this;
-    }
+            foreach ($this->filesPaths as $filePath) {
+                $this->filesDataItems[] = $this->fileReader->readFile($filePath);
+            }
 
-    public function execute(CommandInterface $command = null): CommandInterface
-    {
-        $this->file1Content = $this->fileReader->readFile($this->filesData['FILE1']);
-        $this->file2Content = $this->fileReader->readFile($this->filesData['FILE2']);
+            $file1Content = $this->filesDataItems[0];
+            $file2Content = $this->filesDataItems[1];
+
+            $this->filesContent[] = "file1.json content:\n";
+            $this->filesContent[] = array_reduce(
+                $file1Content,
+                [$this, 'constructContent'],
+                "{"
+            ) . "\n}\n";
+
+            $this->filesContent[] = "file2.json content:\n";
+            $this->filesContent[] = array_reduce(
+                $file2Content,
+                [$this, 'constructContent'],
+                "{"
+            ) . "\n}\n";
+
+            $this->filesContentString = implode("", $this->filesContent);
+
+            $file1Keys = array_keys($file1Content);
+            $this->filesDiffs = array_map(
+                function ($file1Key) use ($file1Content, $file2Content) {
+                    if (array_key_exists($file1Key, $file2Content)) {
+                        if (!strcmp($file1Content[$file1Key], $file2Content[$file1Key])) {
+                            return "    " . $file1Content[$file1Key] . "\n";
+                        } else {
+                            return "  - " . $file1Content[$file1Key] . "\n" .
+                                "  + " . $file2Content[$file1Key] . "\n";
+                        }
+                    } else {
+                        return "  - " . $file1Content[$file1Key] . "\n";
+                    }
+                },
+                $file1Keys
+            );
+            $this->filesDiffsString = "{\n" . implode("", $this->filesDiffs) . "}\n";
+        }
 
         return $this;
     }
 
     public function getFilesContent()
     {
-        return
-        [
-            "FILE1" => $this->file1Content,
-            "FILE2" => $this->file2Content
-        ];
+        return $this->filesContentString;
+    }
+
+    public function getFilesDiffs()
+    {
+        return $this->filesDiffsString;
     }
 }