added display command interface

Author: Alexsey-VR

src/CommandFactory.php

@@ -16,6 +16,7 @@
 use Differ\FilesDiffCommandInterface as FDCI;
 use Differ\CommandInterface as CI;
 use Differ\FormattersInterface as FI;
+use Differ\DisplayCommandInterface as DCI;
 
 class CommandFactory implements CommandFactoryInterface
 {
@@ -47,7 +48,7 @@ public function getFormatKeys(): array
         return self::FORMAT_KEYS;
     }
 
-    public function createCommand(string $commandType): CLP|FDCI|CI|FI
+    public function createCommand(string $commandType): CLP|FDCI|CI|FI|DCI
     {
         switch ($commandType) {
             case "parse":

src/CommandFactoryInterface.php

@@ -6,8 +6,9 @@
 use Differ\FilesDiffCommandInterface as FDCI;
 use Differ\CommandInterface as CI;
 use Differ\FormattersInterface as FI;
+use Differ\DisplayCommandInterface as DCI;
 
 interface CommandFactoryInterface
 {
-    public function createCommand(string $commandType): CLP | FDCI | CI | FI;
+    public function createCommand(string $commandType): CLP | FDCI | CI | FI | DCI;
 }

src/ConsoleApp.php

@@ -6,10 +6,10 @@
 
 class ConsoleApp
 {
-    private CommandInterface|FilesDiffCommandInterface|FormattersInterface $nextCommand;
+    private CommandInterface|FilesDiffCommandInterface|FormattersInterface|DisplayCommandInterface $nextCommand;
     private CommandFactoryInterface $commandFactory;
     private array $flowSteps;
-    private CommandInterface|CommandLineParserInterface|FilesDiffCommandInterface|FormattersInterface $initCommand;
+    private CommandInterface|CommandLineParserInterface|FilesDiffCommandInterface|FormattersInterface|DisplayCommandInterface $initCommand;
 
     public function __construct(
         CommandFactoryInterface $commandFactory

src/DisplayCommand.php

@@ -6,11 +6,12 @@
 use Differ\FilesDiffCommandInterface as FDCI;
 use Differ\CommandInterface as CI;
 use Differ\FormattersInterface as FI;
+use Differ\DisplayCommandInterface as DCI;
 
-class DisplayCommand implements CommandInterface
+class DisplayCommand implements DCI
 {
     private string $mode;
-    private CommandInterface|FormattersInterface $formatCommand;
+    private FormattersInterface $formatCommand;
     private const string MODE_EXCEPTION_MESSAGE = "internal error: unknown mode for display\n";
     public const AVAILABLE_MODES = [
         "differents" => "differents",
@@ -22,7 +23,7 @@ public function __construct(string $mode = self::AVAILABLE_MODES["differents"])
         $this->mode = $mode;
     }
 
-    public function setFormatter(CI|FI $formatter)
+    public function setFormatter(FI $formatter): DCI
     {
         $this->formatCommand = $formatter;
 
@@ -39,7 +40,7 @@ public function getFilesDiffs(): string
         return $this->formatCommand->getDiffsString();
     }
 
-    public function execute(CLP|FDCI|CI|FI $command): CI|FI
+    public function execute(FI $command): DCI
     {
         $this->formatCommand = $command;
         switch ($this->mode) {
@@ -56,7 +57,7 @@ public function execute(CLP|FDCI|CI|FI $command): CI|FI
         return $this;
     }
 
-    public function setMode(string $mode): CI
+    public function setMode(string $mode): DCI
     {
         if (in_array($mode, array_keys(self::AVAILABLE_MODES))) {
             $this->mode = $mode;

src/DisplayCommandInterface.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace Differ;
+
+interface DisplayCommandInterface
+{
+    public function execute(FormattersInterface $command): DisplayCommandInterface;
+    public function getFilesContent(): string;
+    public function getFilesDiffs(): string;
+}