migrate realmCourseActivity to kotlin

app/src/main/java/org/ole/planet/myplanet/model/RealmCourseActivity.kt

@@ -0,0 +1,78 @@
+package org.ole.planet.myplanet.model
+
+import com.google.gson.JsonObject
+import io.realm.Realm
+import io.realm.RealmObject
+import io.realm.annotations.PrimaryKey
+import org.ole.planet.myplanet.utilities.NetworkUtils
+import java.util.Date
+import java.util.UUID
+
+open class RealmCourseActivity : RealmObject() {
+    @PrimaryKey
+    private var _id: String? = null
+    @JvmField
+    var createdOn: String? = null
+    private var _rev: String? = null
+    @JvmField
+    var time: Long = 0
+    @JvmField
+    var title: String? = null
+    @JvmField
+    var courseId: String? = null
+    @JvmField
+    var parentCode: String? = null
+    @JvmField
+    var type: String? = null
+    @JvmField
+    var user: String? = null
+    fun get_rev(): String? {
+        return _rev
+    }
+
+    fun set_rev(_rev: String?) {
+        this._rev = _rev
+    }
+
+    fun get_id(): String? {
+        return _id
+    }
+
+    fun set_id(_id: String?) {
+        this._id = _id
+    }
+
+    companion object {
+        @JvmStatic
+        fun createActivity(realm: Realm, userModel: RealmUserModel, course: RealmMyCourse) {
+            if (!realm.isInTransaction) realm.beginTransaction()
+            val activity = realm.createObject(
+                RealmCourseActivity::class.java, UUID.randomUUID().toString()
+            )
+            activity.type = "visit"
+            activity.title = course.courseTitle
+            activity.courseId = course.courseId
+            activity.time = Date().time
+            activity.parentCode = userModel.parentCode
+            activity.createdOn = userModel.planetCode
+            activity.createdOn = userModel.planetCode
+            activity.user = userModel.name
+            realm.commitTransaction()
+        }
+
+        @JvmStatic
+        fun serializeSerialize(realm_courseActivities: RealmCourseActivity): JsonObject {
+            val ob = JsonObject()
+            ob.addProperty("user", realm_courseActivities.user)
+            ob.addProperty("courseId", realm_courseActivities.courseId)
+            ob.addProperty("type", realm_courseActivities.type)
+            ob.addProperty("title", realm_courseActivities.title)
+            ob.addProperty("time", realm_courseActivities.time)
+            ob.addProperty("createdOn", realm_courseActivities.createdOn)
+            ob.addProperty("parentCode", realm_courseActivities.parentCode)
+            ob.addProperty("androidId", NetworkUtils.getUniqueIdentifier())
+            ob.addProperty("deviceName", NetworkUtils.getDeviceName())
+            return ob
+        }
+    }
+}