Fixed array representation in DynamicMeta

dataforge-meta/src/jsMain/kotlin/hep/dataforge/meta/DynamicMeta.kt

@@ -3,18 +3,27 @@ package hep.dataforge.meta
 import hep.dataforge.names.NameToken
 import hep.dataforge.values.Null
 import hep.dataforge.values.Value
+import hep.dataforge.values.isList
 
 
 //TODO add Meta wrapper for dynamic
 
+fun Value.toDynamic(): dynamic {
+    return if (isList()) {
+        list.map { it.toDynamic() }.toTypedArray().asDynamic()
+    } else {
+        value.asDynamic()
+    }
+}
+
 /**
  * Represent or copy this [Meta] to dynamic object to be passed to JS libraries
  */
 fun Meta.toDynamic(): dynamic {
-    if(this is DynamicMeta) return this.obj
+    if (this is DynamicMeta) return this.obj
 
     fun MetaItem<*>.toDynamic(): dynamic = when (this) {
-        is MetaItem.ValueItem -> this.value.value.asDynamic()
+        is MetaItem.ValueItem -> this.value.toDynamic()
         is MetaItem.NodeItem -> this.node.toDynamic()
     }
 
@@ -35,10 +44,15 @@ class DynamicMeta(val obj: dynamic) : MetaBase() {
     private fun isArray(@Suppress("UNUSED_PARAMETER") obj: dynamic): Boolean =
         js("Array.isArray(obj)") as Boolean
 
+    private fun isPrimitive(obj: dynamic): Boolean =
+        (jsTypeOf(obj) != "object")
+
     @Suppress("UNCHECKED_CAST")
     private fun asItem(obj: dynamic): MetaItem<DynamicMeta>? {
-        if (obj == null) return MetaItem.ValueItem(Null)
-        return when (jsTypeOf(obj as? Any)) {
+        return when {
+            obj == null -> MetaItem.ValueItem(Null)
+            isArray(obj) && (obj as Array<Any?>).all { isPrimitive(it) } -> MetaItem.ValueItem(Value.of(obj as Array<Any?>))
+            else -> when (jsTypeOf(obj)) {
                 "boolean" -> MetaItem.ValueItem(Value.of(obj as Boolean))
                 "number" -> MetaItem.ValueItem(Value.of(obj as Number))
                 "string" -> MetaItem.ValueItem(Value.of(obj as String))
@@ -46,16 +60,21 @@ class DynamicMeta(val obj: dynamic) : MetaBase() {
                 else -> null
             }
         }
+    }
 
     override val items: Map<NameToken, MetaItem<DynamicMeta>>
         get() = keys().flatMap<String, Pair<NameToken, MetaItem<DynamicMeta>>> { key ->
             val value = obj[key] ?: return@flatMap emptyList()
             if (isArray(value)) {
-                return@flatMap (value as Array<dynamic>)
-                    .mapIndexedNotNull() { index, it ->
+                val array = value as Array<Any?>
+                return@flatMap if (array.all { isPrimitive(it) }) {
+                    listOf(NameToken(key) to MetaItem.ValueItem(Value.of(array)))
+                } else {
+                    array.mapIndexedNotNull { index, it ->
                         val item = asItem(it) ?: return@mapIndexedNotNull null
                         NameToken(key, index.toString()) to item
                     }
+                }
             } else {
                 val item = asItem(value) ?: return@flatMap emptyList()
                 listOf(NameToken(key) to item)

dataforge-meta/src/jsTest/kotlin/hep/dataforge/meta/DynamicMetaTest.kt

@@ -2,6 +2,7 @@ package hep.dataforge.meta
 
 import kotlin.test.Test
 import kotlin.test.assertEquals
+import kotlin.test.assertTrue
 
 
 class DynamicMetaTest {
@@ -19,6 +20,34 @@ class DynamicMetaTest {
         val meta = DynamicMeta(d)
         assertEquals(true, meta["ob.booleanNode"].boolean)
         assertEquals(2, meta["array[1]"].int)
+        assertEquals(4, meta.items.size)
+    }
+
+    @Test
+    fun testMetaToDynamic(){
+        val meta = buildMeta {
+            "a" to 22
+            "array" to arrayOf(1, 2, 3)
+            "b" to "myString"
+            "ob" to {
+                "childNode" to 18
+                "booleanNode" to true
+            }
+        }
+
+        val dynamic = meta.toDynamic()
+
+        assertEquals(2,dynamic.array[1])
+
+        assertEquals(22, dynamic.a)
+
+        val keys = js("Object.keys(dynamic)") as Array<String>
+
+        assertTrue { keys.contains("ob") }
+
+        assertEquals(18, dynamic.ob.childNode)
+
+        assertEquals<Meta>(meta, DynamicMeta(dynamic))
     }
 
 }