Add support for outputting 256 colors and also add documentation about default command functionality

README.md

@@ -267,6 +267,21 @@ $app->add((new ConfigListCommand)->inGroup('Config'));
 ...
 ```
 
+#### Default command
+
+By default, running your CLI app without any arguments will show the help screen. However you can set the default action to run one of your commands either by setting the third parameter of the `add` function to `true` or by using the `defaultCommand` function.
+
+```php
+$app->add(new InitCommand, 'i', true);
+
+// Alternatively
+$app->command('init', 'Init something', 'i');
+$app->defaultCommand('init');
+
+// Retrieve the name of the default command
+$default_command = $app->getDefaultCommand();
+```
+
 #### Exception handler
 
 Set a custom exception handler as callback. The callback receives exception & exit code. The callback may rethrow exception or may exit the program or just log exception and do nothing else.
@@ -443,7 +458,7 @@ echo $color->ok('This is ok msg');
 ```php
 Ahc\Cli\Output\Color::style('mystyle', [
     'bg' => Ahc\Cli\Output\Color::CYAN,
-    'fg' => Ahc\Cli\Output\Color::WHITE,
+    'fg' => Ahc\Cli\Output\Color::fg256(57), // 256 colors can be used as well
     'bold' => 1, // You can experiment with 0, 1, 2, 3 ... as well
 ]);
 

src/Output/Color.php

@@ -95,6 +95,22 @@ public function info(string $text, array $style = []): string
         return $this->line($text, ['fg' => static::BLUE] + $style);
     }
 
+    /**
+     * Returns the color code for a 256 background color.
+     */
+    public static function bg256(int $code): string
+    {
+        return "48;5;{$code}";
+    }
+
+    /**
+     * Returns the color code for a 256 foreground color.
+     */
+    public static function fg256(int $code): string
+    {
+        return "38;5;{$code}";
+    }
+
     /**
      * Returns a formatted/colored line.
      */
@@ -108,8 +124,8 @@ public function line(string $text, array $style = []): string
 
         $line = strtr($format, [
             ':mod:' => (int) ($style['mod'] ?? $style['bold']),
-            ':fg:'  => (int) $style['fg'],
-            ':bg:'  => (int) $style['bg'] + 10,
+            ':fg:'  => $style['fg'],
+            ':bg:'  => is_int($style['bg']) ? ($style['bg'] + 10) : $style['bg'],
             ':txt:' => $text,
         ]);
 

tests/Output/ColorTest.php

@@ -30,9 +30,9 @@ public function test_comment()
 
     public function test_custom_style()
     {
-        Color::style('alert', ['bg' => Color::YELLOW, 'fg' => Color::RED, 'bold' => 1]);
+        Color::style('alert', ['bg' => '48;5;82', 'fg' => '38;5;57', 'bold' => 1]);
 
-        $this->assertSame("\033[1;31;43malert\033[0m", (new Color)->alert('alert'));
+        $this->assertSame("\033[1;38;5;57;48;5;82malert\033[0m", (new Color)->alert('alert'));
 
         $this->expectException(InvalidArgumentException::class);
         $this->expectExceptionMessage('Trying to define existing style');