Throw empty list when passing empty list to index

Author: q-litzler

src/commonMain/kotlin/com/algolia/search/endpoint/EndpointIndexingImpl.kt

@@ -3,6 +3,7 @@ package com.algolia.search.endpoint
 import com.algolia.search.client.Index
 import com.algolia.search.configuration.CallType
 import com.algolia.search.dsl.requestOptionsBuilder
+import com.algolia.search.exception.EmptyListException
 import com.algolia.search.helper.toIndexName
 import com.algolia.search.model.Attribute
 import com.algolia.search.model.IndexName
@@ -203,6 +204,7 @@ internal class EndpointIndexingImpl(
         batchOperations: List<BatchOperation>,
         requestOptions: RequestOptions?
     ): ResponseBatch {
+        if (batchOperations.isEmpty()) throw EmptyListException("batchOperations")
         val requests = Json.toJson(BatchOperation.list, batchOperations)
         val body = json { KeyRequests to requests }.toString()
 
@@ -231,6 +233,7 @@ internal class EndpointIndexingImpl(
     }
 
     private suspend fun replaceAllObjectsInternal(batchOperations: List<BatchOperation>): List<TaskIndex> {
+        if (batchOperations.isEmpty()) throw EmptyListException("batchOperations")
         val indexSource = Index(transport, indexName)
         val indexDestination = Index(transport, "${indexName}_tmp_${Random.nextInt()}".toIndexName())
         val scopes = listOf(Scope.Settings, Scope.Rules, Scope.Synonyms)

src/commonMain/kotlin/com/algolia/search/endpoint/EndpointMultipleIndexImpl.kt

@@ -1,6 +1,7 @@
 package com.algolia.search.endpoint
 
 import com.algolia.search.configuration.CallType
+import com.algolia.search.exception.EmptyListException
 import com.algolia.search.model.multipleindex.BatchOperationIndex
 import com.algolia.search.model.multipleindex.IndexQuery
 import com.algolia.search.model.multipleindex.MultipleQueriesStrategy
@@ -50,6 +51,7 @@ internal class EndpointMultipleIndexImpl(
         operations: List<BatchOperationIndex>,
         requestOptions: RequestOptions?
     ): ResponseBatches {
+        if (operations.isEmpty()) throw EmptyListException("operations")
         val requests = Json.toJson(BatchOperationIndex.list, operations)
         val body = json { KeyRequests to requests }.toString()
 

src/commonMain/kotlin/com/algolia/search/endpoint/EndpointRuleImpl.kt

@@ -2,6 +2,7 @@ package com.algolia.search.endpoint
 
 import com.algolia.search.configuration.CallType
 import com.algolia.search.dsl.requestOptionsBuilder
+import com.algolia.search.exception.EmptyListException
 import com.algolia.search.model.IndexName
 import com.algolia.search.model.ObjectID
 import com.algolia.search.model.response.ResponseSearchRules
@@ -79,6 +80,7 @@ internal class EndpointRuleImpl(
         clearExistingRules: Boolean?,
         requestOptions: RequestOptions?
     ): RevisionIndex {
+        if (rules.isEmpty()) throw EmptyListException("rules")
         val body = JsonNoDefaults.stringify(Rule.serializer().list, rules)
         val options = requestOptionsBuilder(requestOptions) {
             parameter(KeyForwardToReplicas, forwardToReplicas)

src/commonMain/kotlin/com/algolia/search/endpoint/EndpointSynonymImpl.kt

@@ -2,6 +2,7 @@ package com.algolia.search.endpoint
 
 import com.algolia.search.configuration.CallType
 import com.algolia.search.dsl.requestOptionsBuilder
+import com.algolia.search.exception.EmptyListException
 import com.algolia.search.model.IndexName
 import com.algolia.search.model.ObjectID
 import com.algolia.search.model.response.ResponseSearchSynonyms
@@ -42,6 +43,7 @@ internal class EndpointSynonymImpl(
         replaceExistingSynonyms: Boolean?,
         requestOptions: RequestOptions?
     ): RevisionIndex {
+        if (synonyms.isEmpty()) throw EmptyListException("synonyms")
         val path = indexName.toPath("/$RouteSynonyms/batch")
         val body = Json.stringify(Synonym.list, synonyms)
         val options = requestOptionsBuilder(requestOptions) {