Resolve #218: Add suggested-by flag for console output

composer.json

@@ -13,7 +13,7 @@
     "authors": [
         {
             "name": "Andreas Frömer",
-            "email": "github@icanhazstring.com"
+            "email": "composer-unused@icanhazstring.com"
         }
     ],
     "require": {

src/Console/Command/UnusedCommand.php

@@ -143,7 +143,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
                     }
 
                     if ($secondRequiredDependency->suggests($requiredDependency)) {
-                        // TODO add "suggested by" in output
+                        $requiredDependency->suggestedBy($secondRequiredDependency);
                         $requiredDependency->markUsed();
                         continue 2;
                     }
@@ -179,7 +179,7 @@ static function (DependencyInterface $dependency) {
         $io->text('<fg=green>Used packages</>');
         foreach ($usedDependencyCollection as $usedDependency) {
             $requiredBy = '';
-            // TODO add suggest by dependency
+            $suggestedBy = '';
 
             if (!empty($usedDependency->getRequiredBy())) {
                 $requiredByNames = array_map(static function (DependencyInterface $dependency) {
@@ -192,12 +192,24 @@ static function (DependencyInterface $dependency) {
                 );
             }
 
+            if (!empty($usedDependency->getSuggestedBy())) {
+                $suggestedByNames = array_map(static function (DependencyInterface $dependency) {
+                    return $dependency->getName();
+                }, $usedDependency->getSuggestedBy());
+
+                $requiredBy = sprintf(
+                    ' (<fg=cyan>suggested by: %s</>)',
+                    implode(', ', $suggestedByNames)
+                );
+            }
+
             $io->writeln(
                 sprintf(
-                    ' <fg=green>%s</> %s%s',
+                    ' <fg=green>%s</> %s%s%s',
                     "\u{2713}",
                     $usedDependency->getName(),
-                    $requiredBy
+                    $requiredBy,
+                    $suggestedBy
                 )
             );
         }

src/Dependency/DependencyInterface.php

@@ -28,4 +28,11 @@ public function requiredBy(DependencyInterface $dependency): void;
      * @return array<DependencyInterface>
      */
     public function getRequiredBy(): array;
+
+    public function suggestedBy(DependencyInterface $dependency): void;
+
+    /**
+     * @return array<DependencyInterface>
+     */
+    public function getSuggestedBy(): array;
 }

src/Dependency/InvalidDependency.php

@@ -58,4 +58,13 @@ public function getRequiredBy(): array
     {
         return [];
     }
+
+    public function suggestedBy(DependencyInterface $dependency): void
+    {
+    }
+
+    public function getSuggestedBy(): array
+    {
+        return [];
+    }
 }

src/Dependency/RequiredDependency.php

@@ -20,6 +20,8 @@ final class RequiredDependency implements DependencyInterface
     private $symbols;
     /** @var array<DependencyInterface> */
     private $requiredBy = [];
+    /** @var array<DependencyInterface> */
+    private $suggestBy = [];
 
     public function __construct(PackageInterface $package, SymbolListInterface $symbols)
     {
@@ -72,4 +74,14 @@ public function getRequiredBy(): array
     {
         return $this->requiredBy;
     }
+
+    public function suggestedBy(DependencyInterface $dependency): void
+    {
+        $this->suggestBy[$dependency->getName()] = $dependency;
+    }
+
+    public function getSuggestedBy(): array
+    {
+        return $this->suggestBy;
+    }
 }