add base network logic

core/network/src/main/java/ru/fincode/tsudesk/core/network/HttpClientProvider.kt

@@ -0,0 +1,10 @@
+package ru.fincode.tsudesk.core.network
+
+object HttpClientProvider {
+
+    fun provide(): OkHttpClient =
+        OkHttpClient.Builder()
+            .connectTimeout(15, TimeUnit.SECONDS)
+            .readTimeout(15, TimeUnit.SECONDS)
+            .build()
+}

core/network/src/main/java/ru/fincode/tsudesk/core/network/NetworkConstants.kt

@@ -0,0 +1,5 @@
+package ru.fincode.tsudesk.core.network
+
+object NetworkConstants {
+    const val BASE_URL = "https://api.tsu.tula.ru/"
+}

core/network/src/main/java/ru/fincode/tsudesk/core/network/NetworkError.kt

@@ -0,0 +1,8 @@
+package ru.fincode.tsudesk.core.network
+
+sealed class NetworkError {
+    object NoInternet : NetworkError()
+    object Timeout : NetworkError()
+    data class Http(val code: Int) : NetworkError()
+    data class Unknown(val throwable: Throwable) : NetworkError()
+}

core/network/src/main/java/ru/fincode/tsudesk/core/network/NetworkResult.kt

@@ -0,0 +1,6 @@
+package ru.fincode.tsudesk.core.network
+
+sealed class NetworkResult<out T> {
+    data class Success<T>(val data: T) : NetworkResult<T>()
+    data class Error(val error: NetworkError) : NetworkResult<Nothing>()
+}

core/network/src/main/java/ru/fincode/tsudesk/core/network/RetrofitProvider.kt

@@ -0,0 +1,11 @@
+package ru.fincode.tsudesk.core.network
+
+object RetrofitProvider {
+
+    fun provide(baseUrl: String, client: OkHttpClient): Retrofit =
+        Retrofit.Builder()
+            .baseUrl(baseUrl)
+            .client(client)
+            .addConverterFactory(SimpleXmlConverterFactory.create())
+            .build()
+}

core/network/src/main/java/ru/fincode/tsudesk/core/network/di/NetworkModule.kt

@@ -0,0 +1,25 @@
+package ru.fincode.tsudesk.core.network.di
+
+import okhttp3.OkHttpClient
+import retrofit2.Retrofit
+import ru.fincode.tsudesk.core.network.HttpClientProvider
+import ru.fincode.tsudesk.core.network.NetworkConstants
+import ru.fincode.tsudesk.core.network.RetrofitProvider
+
+@Module
+@InstallIn(SingletonComponent::class)
+object NetworkModule {
+
+    @Provides
+    @Singleton
+    fun provideOkHttpClient(): OkHttpClient =
+        HttpClientProvider.provide()
+
+    @Provides
+    @Singleton
+    fun provideRetrofit(client: OkHttpClient): Retrofit =
+        RetrofitProvider.provide(
+            baseUrl = NetworkConstants.BASE_URL,
+            client = client
+        )
+}