Enable official kotlin code style.

## Details

https://kotlinlang.org/docs/reference/code-style-migration-guide.html

Author: IRus

backend/src/main/java/cn/nekocode/gank/backend/GankIoService.kt

@@ -28,12 +28,12 @@ import retrofit2.converter.gson.GsonConverterFactory
  */
 class GankIoService(val client: OkHttpClient, val gson: Gson) {
     private val retrofit: Retrofit =
-            Retrofit.Builder()
-                    .baseUrl("http://gank.io/api/data/%E7%A6%8F%E5%88%A9/")
-                    .client(client)
-                    .addConverterFactory(GsonConverterFactory.create(gson))
-                    .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
-                    .build()
+        Retrofit.Builder()
+            .baseUrl("http://gank.io/api/data/%E7%A6%8F%E5%88%A9/")
+            .client(client)
+            .addConverterFactory(GsonConverterFactory.create(gson))
+            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
+            .build()
 
     val picApi: PicApi = retrofit.create(PicApi::class.java)
-}
+}

backend/src/main/java/cn/nekocode/gank/backend/api/PicApi.kt

@@ -29,7 +29,7 @@ interface PicApi {
 
     @GET("{count}/{pageNum}")
     fun getMeiziPics(
-            @Path("count") count: Int,
-            @Path("pageNum") pageNum: Int
-    ):Observable<GankIoResponse<MeiziPic>>
-}
+        @Path("count") count: Int,
+        @Path("pageNum") pageNum: Int
+    ): Observable<GankIoResponse<MeiziPic>>
+}

backend/src/main/java/cn/nekocode/gank/backend/model/MeiziPic.kt

@@ -24,16 +24,16 @@ import com.google.gson.annotations.SerializedName
  * @author nekocode ([email protected])
  */
 data class MeiziPic(
-        @SerializedName("_id") override val id: String,
-        @SerializedName("type") val type: String,
-        @SerializedName("url") val url: String,
-        @SerializedName("who") val who: String
+    @SerializedName("_id") override val id: String,
+    @SerializedName("type") val type: String,
+    @SerializedName("url") val url: String,
+    @SerializedName("who") val who: String
 ) : WithId, Parcelable {
     constructor(parcel: Parcel) : this(
-            parcel.readString(),
-            parcel.readString(),
-            parcel.readString(),
-            parcel.readString()) {
+        parcel.readString(),
+        parcel.readString(),
+        parcel.readString(),
+        parcel.readString()) {
     }
 
     override fun writeToParcel(parcel: Parcel, flags: Int) {
@@ -56,4 +56,4 @@ data class MeiziPic(
             return arrayOfNulls(size)
         }
     }
-}
+}

backend/src/main/java/cn/nekocode/gank/backend/model/wrapper/GankIoResponse.kt

@@ -22,6 +22,6 @@ import com.google.gson.annotations.SerializedName
  * @author nekocode ([email protected])
  */
 data class GankIoResponse<T>(
-        @SerializedName("error") val error: Boolean,
-        @SerializedName("results") val results: List<T>
-)
+    @SerializedName("error") val error: Boolean,
+    @SerializedName("results") val results: List<T>
+)

backend/src/test/java/cn/nekocode/gank/backend/GankIoServiceTest.kt

@@ -29,10 +29,10 @@ class GankIoServiceTest {
     @Test
     fun getMeiziPics() {
         gankIoService.picApi.getMeiziPics(10, 0)
-                .test()
-                .assertNoErrors()
-                .assertValue { response ->
-                    !response.error && response.results.size == 10
-                }
+            .test()
+            .assertNoErrors()
+            .assertValue { response ->
+                !response.error && response.results.size == 10
+            }
     }
-}
+}

gradle.properties

@@ -0,0 +1,2 @@
+# Enables official code style in IDEA https://kotlinlang.org/docs/reference/coding-conventions.html
+kotlin.code.style=official