fix(fossid-webapp): File.licenses can be an empty array

FossId versions before 24.3.2 did not return the "file_licenses" property
when it was empty. Now it returns '[]' for this property value which is
problematic, as it introduces polymorphism (a non-empty 'file_licenses'
property contains a map of integer to object).

Signed-off-by: Nicolas Nobelis <nicolas.nobelis@bosch.com>

Author: nnobelis

clients/fossid-webapp/src/main/kotlin/model/identification/markedAsIdentified/File.kt

@@ -19,6 +19,8 @@
 
 package org.ossreviewtoolkit.clients.fossid.model.identification.markedAsIdentified
 
+import org.ossreviewtoolkit.clients.fossid.PolymorphicData
+
 data class File(
     val id: String?,
 
@@ -29,5 +31,5 @@ data class File(
 
     val size: Int?,
 
-    val licenses: MutableMap<Int, License>?
+    val licenses: PolymorphicData<MutableMap<Int, License>>?
 )

clients/fossid-webapp/src/main/kotlin/model/identification/markedAsIdentified/MarkedAsIdentifiedFile.kt

@@ -46,7 +46,7 @@ data class MarkedAsIdentifiedFile(
     lateinit var file: File
 
     override fun toSummary(): SummaryIdentifiedFile {
-        val licenses = file.licenses?.let { licenses ->
+        val licenses = file.licenses?.value?.let { licenses ->
             licenses.values.map {
                 License(
                     identifier = checkNotNull(it.file.licenseIdentifier),

clients/fossid-webapp/src/test/resources/return-type/__files/body-list_scan_for_project_not_empty.json

@@ -76,6 +76,7 @@
       "file_sha1": "da7c6657784025f38d5bb64733004ca01aa17ac0",
       "file_sha256": "af0254a01efd2ff2bdabce1299d8232625025330c711cf8bece7e566596aea2f",
       "file_size": "377",
+      "file_licenses": [],
       "identification_id": "29648306",
       "identification_copyright": null,
       "components": {

plugins/scanners/fossid/src/test/kotlin/TestUtils.kt

@@ -379,7 +379,7 @@ private fun createMarkedIdentifiedFile(index: Int): MarkedAsIdentifiedFile {
         sha1 = null,
         sha256 = null,
         size = index,
-        licenses = mutableMapOf(index to license)
+        licenses = PolymorphicData(mutableMapOf(index to license))
     )
 
     return file
@@ -428,7 +428,7 @@ internal fun createMarkAsIdentifiedFile(
             sha1 = "fileSha1",
             sha256 = "fileSha256",
             size = 0,
-            licenses = if (comment != null) null else mutableMapOf(1 to fileLicense)
+            licenses = PolymorphicData(if (comment != null) null else mutableMapOf(1 to fileLicense))
         )
     }
 }