feat(assistant): translate task type

gradle/verification-metadata.xml

@@ -13425,6 +13425,11 @@
             <sha256 value="5d5276c1b628afbc42059f340a84defd4bfb5eba18266df3743607e577ed5f87" origin="Generated by Gradle"/>
          </artifact>
       </component>
+      <component group="org.jetbrains.kotlin.plugin.serialization" name="org.jetbrains.kotlin.plugin.serialization.gradle.plugin" version="2.3.0">
+         <artifact name="org.jetbrains.kotlin.plugin.serialization.gradle.plugin-2.3.0.pom">
+            <sha256 value="d468bd1ab8817fc977783c6944b242a067beeda8dbb175509ed1a5a550ac2a91" origin="Generated by Gradle" reason="Artifact is not signed"/>
+         </artifact>
+      </component>
       <component group="org.jetbrains.kotlinx" name="atomicfu" version="0.20.2">
          <artifact name="atomicfu-0.20.2.module">
             <sha256 value="2c995e0e83c583e125706fba3fe85170020d17a88f89d6294a53cd8bd7c4c384" origin="Generated by Gradle"/>

library/build.gradle

@@ -30,6 +30,7 @@ buildscript {
 
 plugins {
     id "com.diffplug.spotless" version "8.1.0"
+    id 'org.jetbrains.kotlin.plugin.serialization' version '2.3.0'
 }
 
 apply plugin: 'com.android.library'
@@ -59,6 +60,8 @@ configurations {
 }
 
 dependencies {
+    implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.9.0"
+
     implementation 'org.apache.jackrabbit:jackrabbit-webdav:2.13.5'
     api 'com.squareup.okhttp3:okhttp:5.3.2'
     implementation 'com.github.bitfireAT:dav4jvm:2.2.1'

library/src/androidTest/java/com/owncloud/android/lib/resources/assistant/v2/AssistantV2Tests.kt

@@ -83,7 +83,9 @@ class AssistantV2Tests : AbstractIT() {
         val taskType = getTaskType()
         val selectedTaskType = getSelectedTaskType()
 
-        assertTrue(CreateTaskRemoteOperationV2(input, taskType).execute(nextcloudClient).isSuccess)
+        val createTaskOperation = CreateTaskRemoteOperationV2(input, taskType)
+        val createTaskOperationResult = createTaskOperation.execute(nextcloudClient)
+        assertTrue(createTaskOperationResult.isSuccess)
 
         var result = GetTaskListRemoteOperationV2(selectedTaskType).execute(nextcloudClient)
         assertTrue(result.isSuccess)

library/src/main/java/com/owncloud/android/lib/resources/assistant/v2/CreateTaskRemoteOperationV2.kt

@@ -13,37 +13,42 @@ import com.nextcloud.operations.PostMethod
 import com.owncloud.android.lib.common.operations.RemoteOperation
 import com.owncloud.android.lib.common.operations.RemoteOperationResult
 import com.owncloud.android.lib.resources.assistant.v2.model.TaskTypeData
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.buildJsonObject
+import kotlinx.serialization.json.encodeToJsonElement
+import kotlinx.serialization.json.put
 import okhttp3.MediaType.Companion.toMediaTypeOrNull
 import okhttp3.RequestBody.Companion.toRequestBody
 import org.apache.commons.httpclient.HttpStatus
 
-class CreateTaskRemoteOperationV2(
+open class CreateTaskRemoteOperationV2(
     private val input: String,
     private val taskType: TaskTypeData
 ) : RemoteOperation<Void>() {
-    override fun run(client: NextcloudClient): RemoteOperationResult<Void> {
+    protected open fun buildRequestBody(): String {
         val inputField = hashMapOf("input" to input)
 
-        val requestBody =
-            hashMapOf(
-                "input" to inputField,
-                "type" to taskType.id,
-                "appId" to "assistant",
-                "customId" to ""
-            )
+        val jsonObject =
+            buildJsonObject {
+                put("input", Json.encodeToJsonElement(inputField))
+                put("type", taskType.id)
+                put("appId", "assistant")
+                put("customId", "")
+            }
 
-        val json = gson.toJson(requestBody)
+        return Json.encodeToString(jsonObject)
+    }
 
+    override fun run(client: NextcloudClient): RemoteOperationResult<Void> {
+        val json = buildRequestBody()
         val request = json.toRequestBody("application/json".toMediaTypeOrNull())
-
         val postMethod = PostMethod(client.baseUri.toString() + TAG_URL, true, request)
-
         val status = postMethod.execute(client)
 
         return if (status == HttpStatus.SC_OK) {
-            RemoteOperationResult<Void>(true, postMethod)
+            RemoteOperationResult(true, postMethod)
         } else {
-            RemoteOperationResult<Void>(false, postMethod)
+            RemoteOperationResult(false, postMethod)
         }
     }
 

library/src/main/java/com/owncloud/android/lib/resources/assistant/v2/CreateTranslationTaskRemoteOperation.kt

@@ -0,0 +1,35 @@
+/*
+ * Nextcloud Android Library
+ *
+ * SPDX-FileCopyrightText: 2026 Alper Ozturk <alper.ozturk@nextcloud.com>
+ * SPDX-License-Identifier: MIT
+ */
+
+package com.owncloud.android.lib.resources.assistant.v2
+
+import com.owncloud.android.lib.resources.assistant.v2.model.TaskTypeData
+import com.owncloud.android.lib.resources.assistant.v2.model.TranslationRequest
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.buildJsonObject
+import kotlinx.serialization.json.encodeToJsonElement
+import kotlinx.serialization.json.put
+
+class CreateTranslationTaskRemoteOperation(
+    private val input: TranslationRequest,
+    private val taskType: TaskTypeData
+) : CreateTaskRemoteOperationV2(
+        input = "",
+        taskType = taskType
+    ) {
+    override fun buildRequestBody(): String {
+        val jsonObject =
+            buildJsonObject {
+                put("input", Json.encodeToJsonElement(input))
+                put("type", taskType.id)
+                put("appId", "assistant")
+                put("customId", "")
+            }
+
+        return Json.encodeToString(jsonObject)
+    }
+}

library/src/main/java/com/owncloud/android/lib/resources/assistant/v2/GetTaskTypesRemoteOperationV2.kt

@@ -71,7 +71,7 @@ class GetTaskTypesRemoteOperationV2 : OCSRemoteOperation<List<TaskTypeData>>() {
                         ?.types
                         ?.map { (key, value) -> value.copy(id = value.id ?: key) }
                         ?.filter { taskType ->
-                            isSingleTextInputOutput(taskType) || taskType.isChat()
+                            isSingleTextInputOutput(taskType) || taskType.isChat() || taskType.isTranslate()
                         }?.sortedByDescending { it.isChat() }
 
                 result = RemoteOperationResult(true, getMethod)

library/src/main/java/com/owncloud/android/lib/resources/assistant/v2/model/TaskList.kt

@@ -25,7 +25,9 @@ data class Task(
     val lastUpdated: Int? = null,
     val scheduledAt: Int? = null,
     val endedAt: Int? = null
-)
+) {
+    fun isTranslate(): Boolean = (type == "core:text2text:translate")
+}
 
 data class TaskInput(
     var input: String? = null

library/src/main/java/com/owncloud/android/lib/resources/assistant/v2/model/TaskTypes.kt

@@ -17,12 +17,20 @@ data class TaskTypeData(
     val name: String,
     val description: String?,
     val inputShape: Map<String, Shape>,
-    val outputShape: Map<String, Shape>
+    val outputShape: Map<String, Shape>,
+    val optionalInputShapeDefaults: Map<String, Any>? = null,
+    val optionalInputShapeEnumValues: Map<String, List<EnumValue>>? = null,
+    val inputShapeEnumValues: Map<String, List<EnumValue>>? = null,
+    val outputShapeEnumValues: Map<String, List<EnumValue>>? = null,
+    val optionalOutputShapeEnumValues: Map<String, List<EnumValue>>? = null
 ) {
     private val chatTaskName = "Chat"
+    private val translateTaskName = "Translate"
 
     fun isChat(): Boolean = (name == chatTaskName)
 
+    fun isTranslate(): Boolean = (name == translateTaskName)
+
     companion object {
         private const val CONVERSATION_LIST_ID = "ConversationList"
         val conversationList =
@@ -36,6 +44,11 @@ data class TaskTypeData(
     }
 }
 
+data class EnumValue(
+    val name: String,
+    val value: String
+)
+
 data class Shape(
     val name: String,
     val description: String,

library/src/main/java/com/owncloud/android/lib/resources/assistant/v2/model/Translation.kt

@@ -0,0 +1,57 @@
+/*
+ * Nextcloud Android Library
+ *
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-FileCopyrightText: 2026 Alper Ozturk <alper.ozturk@nextcloud.com>
+ * SPDX-License-Identifier: MIT
+ */
+
+package com.owncloud.android.lib.resources.assistant.v2.model
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+data class TranslationLanguage(
+    val name: String,
+    val code: String
+)
+
+@Serializable
+data class TranslationRequest(
+    @SerialName("origin_language")
+    val originLanguage: String,
+    @SerialName("max_tokens")
+    val maxTokens: Double,
+    val model: String,
+    @SerialName("target_language")
+    val targetLanguage: String,
+    val input: String
+)
+
+data class TranslationModel(
+    val model: String,
+    val maxTokens: Double
+)
+
+data class TranslationLanguages(
+    val originLanguages: List<TranslationLanguage>,
+    val targetLanguages: List<TranslationLanguage>
+)
+
+fun TaskTypeData.toTranslationLanguages(): TranslationLanguages {
+    fun List<EnumValue>?.toTranslationLanguageList() =
+        this
+            .orEmpty()
+            .map { TranslationLanguage(it.name, it.value) }
+
+    return TranslationLanguages(
+        originLanguages = inputShapeEnumValues?.get("origin_language").toTranslationLanguageList(),
+        targetLanguages = inputShapeEnumValues?.get("target_language").toTranslationLanguageList()
+    )
+}
+
+fun TaskTypeData.toTranslationModel(): TranslationModel? {
+    val model = optionalInputShapeDefaults?.get("model") as? String
+    val maxTokens = optionalInputShapeDefaults?.get("max_tokens") as? Double
+    return if (model != null && maxTokens != null) TranslationModel(model, maxTokens) else null
+}