Added localization support

services/LocalizationService.php

@@ -0,0 +1,103 @@
+<?php
+
+namespace Grocy\Services;
+
+class LocalizationService extends BaseService
+{
+	const DEFAULT_CULTURE = 'en';
+
+	public function __construct(string $culture)
+	{
+		parent::__construct();
+
+		$this->Culture = $culture;
+
+		$this->StringsDefaultCulture = $this->LoadLocalizationFile(self::DEFAULT_CULTURE);
+		$this->StringsCurrentCulture = $this->LoadLocalizationFile($culture);
+		$this->StringsMerged = array_merge($this->StringsDefaultCulture, $this->StringsCurrentCulture);
+	}
+
+	protected $Culture;
+	protected $StringsDefaultCulture;
+	protected $StringsCurrentCulture;
+	protected $StringsMerged;
+
+	private function LoadLocalizationFile(string $culture)
+	{
+		$file = __DIR__ . "/../localization/$culture.php";
+
+		if (file_exists($file))
+		{
+			return require $file;
+		}
+		else
+		{
+			return array();
+		}
+	}
+
+	private function LogMissingLocalization(string $culture, string $text)
+	{
+		$file = __DIR__ . "/../data/missing_translations_$culture.json";
+
+		$missingTranslations = array();
+		if (file_exists($file))
+		{
+			$missingTranslations = json_decode(file_get_contents($file), true);
+		}
+
+		if (!array_key_exists($text, $missingTranslations))
+		{
+			$missingTranslations[$text] = '#TranslationMissing#';
+		}
+
+		if (count($missingTranslations) > 0)
+		{
+			file_put_contents($file, json_encode($missingTranslations, JSON_PRETTY_PRINT));
+		}
+	}
+
+	public function Localize(string $text, ...$placeholderValues)
+	{
+		if (MODE === 'dev')
+		{
+			if (!array_key_exists($text, $this->StringsDefaultCulture))
+			{
+				$this->LogMissingLocalization(self::DEFAULT_CULTURE, $text);
+			}
+
+			if (!array_key_exists($text, $this->StringsCurrentCulture))
+			{
+				$this->LogMissingLocalization($this->Culture, $text);
+			}
+		}
+
+		$localizedText = $text;
+		if (array_key_exists($text, $this->StringsMerged))
+		{
+			$localizedText = $this->StringsMerged[$text];
+		}
+
+		for ($i = 0; $i < count($placeholderValues); $i++)
+		{
+			$localizedText = str_replace('#' . ($i + 1), $placeholderValues[$i], $localizedText);
+		}
+
+		return $localizedText;
+	}
+
+	public function GetLocalizations()
+	{
+		return $this->StringsMerged;
+	}
+
+	public function GetDefaultCultureLocalizations()
+	{
+		return $this->StringsDefaultCulture;
+	}
+
+	public function GetCurrentCultureLocalizations()
+	{
+		return $this->StringsCurrentCulture;
+	}
+}