Add ConvertService and CovertController in backend

README.md

@@ -26,29 +26,10 @@ Children between 5-15 years old learning Japanese as (one of) their home languag
   (** upcoming features)
 ## 6. Tech Stack
 ### Backend
-- Java
-- Spring Boot
-- Maven
-- Lombok
-- REST
-- DeepL API
+Java, Spring Boot, Maven, REST, MongoDB, DeepL API, goo API
 ### Frontend
-- JavaScript
-- TypeScript
-- CSS
-- HTML
-- React
-- Vite
-- Axios
-- MUI
-### Data Bank
-- MongoDB
+JavaScript, TypeScript, CSS, HTML, React, Vite, MUI
 ### TDD
-- JUnit
-- Mockito
-- SonarCloud
-- DeepL API mock server
-### CI/CD
-- GitHub Actions
-- Docker
-- AWS
+JUnit, Mockito, SonarLint, SonarCloud
+### DevOps, CI/CD
+Docker, GitHub Actions, AWS

backend/pom.xml

@@ -68,11 +68,20 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-validation</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-webflux</artifactId>
+        </dependency>
         <dependency>
             <groupId>com.deepl.api</groupId>
             <artifactId>deepl-java</artifactId>
             <version>1.3.0</version>
         </dependency>
+        <dependency>
+            <groupId>com.ibm.icu</groupId>
+            <artifactId>icu4j</artifactId>
+            <version>73.2</version>
+        </dependency>
     </dependencies>
     <build>
         <finalName>kotokoapp</finalName>

backend/src/main/java/de/neuefische/koheis/backend/converter/Conversion.java

@@ -0,0 +1,8 @@
+package de.neuefische.koheis.backend.converter;
+
+public record Conversion(
+        String kanji,
+        String kana,
+        String alphabet
+) {
+}

backend/src/main/java/de/neuefische/koheis/backend/converter/ConvertController.java

@@ -0,0 +1,24 @@
+package de.neuefische.koheis.backend.converter;
+
+import de.neuefische.koheis.backend.translation.Translation;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("api/converter")
+public class ConvertController {
+
+    private final ConvertService convertService;
+
+    public ConvertController(ConvertService convertService) {
+        this.convertService = convertService;
+    }
+
+    @PostMapping
+    public Conversion convertTranslationToConversion(@RequestBody Translation translation) {
+        return convertService.convertTranslationToConversion(translation);
+    }
+
+}

backend/src/main/java/de/neuefische/koheis/backend/converter/ConvertService.java

@@ -0,0 +1,61 @@
+package de.neuefische.koheis.backend.converter;
+
+import de.neuefische.koheis.backend.translation.Translation;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Service;
+import org.springframework.web.reactive.function.client.WebClient;
+import java.util.Objects;
+
+@Service
+public class ConvertService {
+
+    private final GooConfig gooConfig;
+    private final WebClient webClient;
+    private final KanaConverter kanaConverter;
+
+    public ConvertService(GooConfig gooConfig, @Value("${goo.api.url}") String url, KanaConverter kanaConverter) {
+        this.gooConfig = gooConfig;
+        this.webClient = WebClient.create(url);
+        this.kanaConverter = kanaConverter;
+    }
+
+    public GooRequest getGooRequest(String original, String kanaType) {
+        String appId = gooConfig.getId();
+        return new GooRequest(appId, original, kanaType);
+    }
+
+    public String convertKanjiToKana(GooRequest gooRequest) {
+        return Objects.requireNonNull(webClient.post()
+                .contentType(MediaType.APPLICATION_JSON)
+                .bodyValue(gooRequest)
+                .retrieve()
+                .toEntity(GooResponse.class)
+                .block()).getBody().converted();
+    }
+
+    public String convertKanaToAlphabet(String kana) {
+        if (kana.matches("^[\\u3040-\\u309F]+$")) {
+            return kanaConverter.convertHiraganaToAlphabet(kana);
+        } else if (kana.matches("^[\\u30A0-\\u30FF]+$")) {
+            return kanaConverter.convertKatakanaToAlphabet(kana);
+        } else {
+            return "Invalid input. Input must be hiragana or katakana!";
+        }
+    }
+
+    public Conversion convertTranslationToConversion(Translation translation) {
+        String translated = translation.getJapanese();
+        if (translated.matches("^[\\u4E00-\\u9FFF]+$")) {
+            String kana = convertKanjiToKana(getGooRequest(translated, "hiragana"));
+            String alphabet = convertKanaToAlphabet(kana);
+            return new Conversion(translated, kana, alphabet);
+        } else if ((translated.matches("^[\\u3040-\\u309F]+$")) || (translation.getJapanese().matches("^[\\u30A0-\\u30FF]+$"))) {
+            String alphabet = convertKanaToAlphabet(translated);
+            return new Conversion("", translated, alphabet);
+        } else {
+            return new Conversion("", "", "");
+        }
+    }
+
+}

backend/src/main/java/de/neuefische/koheis/backend/converter/GooConfig.java

@@ -0,0 +1,16 @@
+package de.neuefische.koheis.backend.converter;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+@Component
+public class GooConfig {
+
+    @Value("${goo.api.id}")
+    private String apiId;
+
+    public String getId() {
+        return apiId;
+    }
+
+}

backend/src/main/java/de/neuefische/koheis/backend/converter/GooRequest.java

@@ -0,0 +1,8 @@
+package de.neuefische.koheis.backend.converter;
+
+public record GooRequest(
+        String app_id,
+        String sentence,
+        String output_type
+) {
+}

backend/src/main/java/de/neuefische/koheis/backend/converter/GooResponse.java

@@ -0,0 +1,6 @@
+package de.neuefische.koheis.backend.converter;
+
+public record GooResponse(
+        String converted
+) {
+}

backend/src/main/java/de/neuefische/koheis/backend/converter/KanaConverter.java

@@ -0,0 +1,20 @@
+package de.neuefische.koheis.backend.converter;
+
+import com.ibm.icu.text.Transliterator;
+import org.springframework.stereotype.Component;
+
+@Component
+public class KanaConverter {
+
+    public String convertHiraganaToAlphabet(String hiragana) {
+        Transliterator trans = Transliterator.getInstance("Hiragana-Latin");
+        return trans.transliterate(hiragana);
+
+    }
+
+    public String convertKatakanaToAlphabet(String katakana) {
+        Transliterator trans = Transliterator.getInstance("Katakana-Latin");
+        return trans.transliterate(katakana);
+    }
+
+}

backend/src/main/resources/application.properties

@@ -1,3 +1,5 @@
 spring.data.mongodb.uri=${MONGO_DB_URI}
 server.error.include-message=always
 deepl.api.key=${DEEPL_API_KEY}
+goo.api.id=${GOO_API_ID}
+goo.api.url=${GOO_API_URL}