Add http retry back on unauthorized request

app/src/main/java/audio/funkwhale/ffa/repositories/HttpUpstream.kt

@@ -7,6 +7,7 @@ import com.github.kittinunf.fuel.Fuel
 import com.github.kittinunf.fuel.core.FuelError
 import com.github.kittinunf.fuel.core.ResponseDeserializable
 import com.github.kittinunf.fuel.coroutines.awaitObjectResponseResult
+import com.github.kittinunf.fuel.coroutines.awaitObjectResult
 import com.github.kittinunf.result.Result
 import com.google.gson.Gson
 import kotlinx.coroutines.Dispatchers.IO
@@ -32,6 +33,8 @@ class HttpUpstream<D : Any, R : OtterResponse<D>>(
     Progressive
   }
 
+  private val http = HTTP(context, oAuth)
+
   override fun fetch(size: Int): Flow<Repository.Response<D>> = flow<Repository.Response<D>> {
 
     context?.let {
@@ -89,10 +92,36 @@ class HttpUpstream<D : Any, R : OtterResponse<D>>(
       val request = Fuel.get(mustNormalizeUrl(url)).apply {
         authorize(context, oAuth)
       }
-      val (_, _, result) = request.awaitObjectResponseResult(GenericDeserializer<R>(type))
+      val (_, response, result) = request.awaitObjectResponseResult(GenericDeserializer<R>(type))
+
+      if (response.statusCode == 401) {
+        return retryGet(url)
+      }
+
       result
     } catch (e: Exception) {
       Result.error(FuelError.wrap(e))
     }
   }
+
+  private suspend fun retryGet(url: String): Result<R, FuelError> {
+    context?.let {
+      return try {
+        return if (http.refresh()) {
+          val request = Fuel.get(mustNormalizeUrl(url)).apply {
+            if (!Settings.isAnonymous()) {
+              header("Authorization", "Bearer ${oAuth.state().accessToken}")
+            }
+          }
+
+          request.awaitObjectResult(GenericDeserializer(type))
+        } else {
+          Result.Failure(FuelError.wrap(RefreshError))
+        }
+      } catch (e: Exception) {
+        Result.error(FuelError.wrap(e))
+      }
+    }
+    throw IllegalStateException("Illegal state: context is null")
+  }
 }

app/src/main/java/audio/funkwhale/ffa/utils/Data.kt

@@ -1,6 +1,14 @@
 package audio.funkwhale.ffa.utils
 
 import android.content.Context
+import audio.funkwhale.ffa.activities.FwCredentials
+import com.github.kittinunf.fuel.Fuel
+import com.github.kittinunf.fuel.core.FuelError
+import com.github.kittinunf.fuel.coroutines.awaitObjectResponseResult
+import com.github.kittinunf.fuel.coroutines.awaitObjectResult
+import com.github.kittinunf.fuel.gson.gsonDeserializerOf
+import com.github.kittinunf.result.Result
+import com.preference.PowerPreference
 import java.io.BufferedReader
 import java.io.File
 import java.nio.charset.Charset
@@ -8,6 +16,78 @@ import java.security.MessageDigest
 
 object RefreshError : Throwable()
 
+class HTTP(
+  val context: Context?,
+  val oAuth: OAuth
+) {
+
+  suspend fun refresh(): Boolean {
+    context?.let {
+      val body = mapOf(
+        "username" to PowerPreference.getFileByName(AppContext.PREFS_CREDENTIALS)
+          .getString("username"),
+        "password" to PowerPreference.getFileByName(AppContext.PREFS_CREDENTIALS)
+          .getString("password")
+      ).toList()
+
+      val result = Fuel.post(mustNormalizeUrl("/api/v1/token"), body).apply {
+        if (!Settings.isAnonymous()) {
+          authorize(it, oAuth)
+          header("Authorization", "Bearer ${oAuth.state().accessToken}")
+        }
+      }
+        .awaitObjectResult(gsonDeserializerOf(FwCredentials::class.java))
+
+      return result.fold(
+        { data ->
+          PowerPreference.getFileByName(AppContext.PREFS_CREDENTIALS)
+            .setString("access_token", data.token)
+
+          true
+        },
+        { false }
+      )
+    }
+    throw IllegalStateException("Illegal state: context is null")
+  }
+
+  suspend inline fun <reified T : Any> get(url: String): Result<T, FuelError> {
+
+    context?.let {
+      val request = Fuel.get(mustNormalizeUrl(url)).apply {
+        if (!Settings.isAnonymous()) {
+          authorize(it, oAuth)
+          header("Authorization", "Bearer ${oAuth.state().accessToken}")
+        }
+      }
+
+      val (_, response, result) = request.awaitObjectResponseResult(gsonDeserializerOf(T::class.java))
+
+      if (response.statusCode == 401) {
+        return retryGet(url)
+      } else {
+        return result
+      }
+    }
+    throw IllegalStateException("Illegal state: context is null")
+  }
+
+  suspend inline fun <reified T : Any> retryGet(
+    url: String
+  ): Result<T, FuelError> {
+    context?.let {
+      val request = Fuel.get(mustNormalizeUrl(url)).apply {
+        if (!Settings.isAnonymous()) {
+          authorize(context,oAuth)
+          header("Authorization", "Bearer ${oAuth.state().accessToken}")
+        }
+      }
+      request.awaitObjectResult(gsonDeserializerOf(T::class.java))
+    }
+    throw IllegalStateException("Illegal state: context is null")
+  }
+}
+
 object FFACache {
   private fun key(key: String): String {
     val md = MessageDigest.getInstance("SHA-1")