Add translator aware & ReturnKeyTranslator

composer.json

@@ -9,7 +9,7 @@
     }
   ],
   "require": {
-    "php": ">=7.1.0",
+    "php": ">=7.4",
     "packaged/helpers": "~1.0||^2.0"
   },
   "require-dev": {

src/TranslatorAware.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Packaged\I18n;
+
+use Packaged\I18n\Translators\Translator;
+
+interface TranslatorAware
+{
+  public function setTranslator(Translator $translator): self;
+
+  public function getTranslator(): Translator;
+
+  public function hasTranslator(): bool;
+}

src/TranslatorAwareTrait.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Packaged\I18n;
+
+use Packaged\I18n\Translators\ReplacementsOnlyTranslator;
+use Packaged\I18n\Translators\Translator;
+
+trait TranslatorAwareTrait
+{
+  private ?Translator $_translator;
+
+  public function setTranslator(Translator $translator): self
+  {
+    $this->_translator = $translator;
+    return $this;
+  }
+
+  public function getTranslator(): Translator
+  {
+    return $this->_translator ?? new ReplacementsOnlyTranslator();
+  }
+
+  public function hasTranslator(): bool
+  {
+    return $this->_translator !== null;
+  }
+}

src/Translators/ReturnKeyTranslator.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace Packaged\I18n\Translators;
+
+class ReturnKeyTranslator implements Translator
+{
+  public function _($msgId, $default, array $replacements = null, $choice = null)
+  {
+    return $msgId;
+  }
+}