Merge pull request #21 from amihaiemil/19

#19 GET SupportedLanguages implemented

src/main/java/io/imagineobjects/linguinai/LinguinAi.java

@@ -5,7 +5,6 @@
  * @author Mihai Andronache (amihaiemil@gmail.com)
  * @version $Id$
  * @since 0.0.1
- * @todo #15:60min Implement the GET SupportedLanguages endpoint.
  */
 public interface LinguinAi {
 
@@ -31,4 +30,10 @@ public interface LinguinAi {
      * @return BulkDetection.
      */
     BulkDetection bulkDetect(final String... texts);
+
+    /**
+     * List the languages supported by Linguin.ai.
+     * @return SupportedLanguages.
+     */
+    SupportedLanguages languages();
 }

src/main/java/io/imagineobjects/linguinai/RestLinguinAi.java

@@ -203,4 +203,42 @@ public String toString() {
             );
         }
     }
+
+    @Override
+    public SupportedLanguages languages() {
+        final Resource resource = this.resources.get(
+            URI.create(this.baseUri + "/languages")
+        );
+        if(resource.statusCode() != HttpURLConnection.HTTP_OK) {
+            throw new IllegalStateException(
+                "Call to /languages returned status code "
+                + resource.statusCode() + ", instead of 200 OK"
+            );
+        }
+        final List<SupportedLanguage> supported = new ArrayList<>();
+        final JsonObject json = resource.asJsonObject();
+        for(final String code : json.keySet()) {
+            supported.add(
+                new SupportedLanguage() {
+                    @Override
+                    public String code() {
+                        return code;
+                    }
+
+                    @Override
+                    public String[] englishNames() {
+                        return json.getJsonArray(code)
+                            .getString(0).split(";");
+                    }
+
+                    @Override
+                    public String[] nativeNames() {
+                        return json.getJsonArray(code)
+                            .getString(1).split(";");
+                    }
+                }
+            );
+        }
+        return () -> supported.iterator();
+    }
 }

src/main/java/io/imagineobjects/linguinai/SupportedLanguage.java

@@ -0,0 +1,29 @@
+package io.imagineobjects.linguinai;
+
+/**
+ * Language supported by Linguin.ai.
+ * @author Mihai Andronache (amihaiemil@gmail.com)
+ * @version $Id$
+ * @since 0.0.1
+ */
+public interface SupportedLanguage {
+
+    /**
+     * Language code.
+     * @return String.
+     */
+    String code();
+
+    /**
+     * Name(s) of the language in english.
+     * @return String[].
+     */
+    String[] englishNames();
+
+    /**
+     * Name(s) of the language in said language.
+     * @return String[].
+     */
+    String[] nativeNames();
+
+}

src/main/java/io/imagineobjects/linguinai/SupportedLanguages.java

@@ -0,0 +1,10 @@
+package io.imagineobjects.linguinai;
+
+/**
+ * Languages supported by Linguin.ai.
+ * @author Mihai Andronache (amihaiemil@gmail.com)
+ * @version $Id$
+ * @since 0.0.1
+ */
+public interface SupportedLanguages extends Iterable<SupportedLanguage> {
+}