feat(model-client): load readonly version in js client

Author: abstraktor

model-client/src/jsMain/kotlin/org/modelix/model/client2/ClientJS.kt

@@ -8,18 +8,21 @@ import kotlinx.coroutines.DelicateCoroutinesApi
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.await
 import kotlinx.coroutines.promise
+import kotlinx.datetime.toJSDate
 import org.modelix.datastructures.model.IGenericModelTree
 import org.modelix.model.TreeId
 import org.modelix.model.api.INode
 import org.modelix.model.api.INodeReference
 import org.modelix.model.api.JSNodeConverter
 import org.modelix.model.client.IdGenerator
 import org.modelix.model.data.ModelData
+import org.modelix.model.lazy.CLVersion
 import org.modelix.model.lazy.RepositoryId
 import org.modelix.model.lazy.createObjectStoreCache
 import org.modelix.model.mutable.DummyIdGenerator
 import org.modelix.model.mutable.INodeIdGenerator
 import org.modelix.model.mutable.ModelixIdGenerator
+import org.modelix.model.mutable.asMutableSingleThreaded
 import org.modelix.model.mutable.asMutableThreadSafe
 import org.modelix.model.mutable.load
 import org.modelix.model.mutable.withAutoTransactions
@@ -111,6 +114,8 @@ interface ClientJS {
      */
     fun initRepository(repositoryId: String, useRoleIds: Boolean = true): Promise<Unit>
 
+    fun loadReadonlyVersion(repositoryId: String, versionHash: String): Promise<Pair<MutableModelTreeJs, VersionInformationJS>>
+
     /**
      * Fetch existing branches for a given repository from the model server.
      *
@@ -192,6 +197,16 @@ internal class ClientJSImpl(private val modelClient: ModelClientV2) : ClientJS {
         }
     }
 
+    override fun loadReadonlyVersion(repositoryId: String, versionHash: String): Promise<Pair<MutableModelTreeJs, VersionInformationJS>> {
+        return GlobalScope.promise {
+            val version = modelClient.loadVersion(RepositoryId(repositoryId), versionHash, null)
+            MutableModelTreeJsImpl(version.getModelTree().asMutableSingleThreaded()) to VersionInformationJS(
+                (version as CLVersion).author,
+                version.getTimestamp()?.toJSDate(),
+                version.getContentHash())
+        }
+    }
+
     override fun dispose() {
         modelClient.close()
     }