ui enhancement(LanguagesScreen): add emojis for languages and redesig…

…n language item

app/src/main/java/com/kaajjo/libresudoku/ui/components/locale_emoji/LocaleEmoji.kt

@@ -0,0 +1,38 @@
+package com.kaajjo.libresudoku.ui.components.locale_emoji
+
+import android.util.Log
+
+object LocaleEmoji {
+    /**
+     * Get a country flag from language code
+     * @return country flag (emoji)
+     */
+    fun getFlagEmoji(
+        languageCode: String
+    ): String? {
+        val countryCode = countryFromLanguage(languageCode)
+        if (countryCode.isNullOrBlank()) return null
+
+        return countryCodeToEmoji(countryCode)
+    }
+
+    private fun countryFromLanguage(languageCode: String?): String? {
+        if (languageCode == null) return null
+
+        return languageCodeToCountryCode[languageCode.lowercase()]
+    }
+
+    private fun countryCodeToEmoji(countryCode: String): String? {
+        val uppercaseCode = countryCode.uppercase()
+
+        try {
+            val firstChar = uppercaseCode[0] - 'A' + 0x1F1E6
+            val secondChar = uppercaseCode[1] - 'A' + 0x1F1E6
+            val emoji = String(Character.toChars(firstChar)) + String(Character.toChars(secondChar))
+            return emoji
+        } catch (e: IllegalArgumentException) {
+            Log.e("LocaleEmoji", "Cannot find flag for: $countryCode")
+            return null
+        }
+    }
+}