AC-1101: Migrate LocationDAO to Kotlin (#1020)

* Rename .java to .kt

* AC-1101: Migrate LocationDAO to Kotlin

openmrs-android-sdk/src/main/java/com/openmrs/android_sdk/library/dao/LocationDAO.kt

@@ -0,0 +1,107 @@
+/*
+ * The contents of this file are subject to the OpenMRS Public License
+ * Version 1.0 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://license.openmrs.org
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * Copyright (C) OpenMRS, LLC.  All Rights Reserved.
+ */
+package com.openmrs.android_sdk.library.dao
+
+import com.openmrs.android_sdk.library.OpenmrsAndroid
+import com.openmrs.android_sdk.library.databases.AppDatabase
+import com.openmrs.android_sdk.library.databases.AppDatabaseHelper.createObservableIO
+import com.openmrs.android_sdk.library.databases.entities.LocationEntity
+import com.openmrs.android_sdk.utilities.StringUtils.notNull
+import rx.Observable
+import java.util.concurrent.Callable
+import javax.inject.Inject
+import javax.inject.Singleton
+
+
+/**
+ * The type Location dao.
+ */
+@Singleton
+class LocationDAO @Inject constructor() {
+    /**
+     * The Location room dao.
+     */
+    var locationRoomDAO = AppDatabase.getDatabase(
+        OpenmrsAndroid.getInstance()!!.applicationContext
+    ).locationRoomDAO()
+
+    /**
+     * Save location observable.
+     *
+     * @param location the location
+     * @return the observable
+     */
+    fun saveLocation(location: LocationEntity): Observable<Long> {
+        return createObservableIO(Callable { locationRoomDAO.addLocation(location) })
+    }
+
+    /**
+     * Delete all locations.
+     * @return boolean true if successful
+     */
+    fun deleteAllLocations(): Observable<Boolean> {
+        return createObservableIO(Callable {
+            locationRoomDAO.deleteAllLocations()
+            true
+        })
+    }
+
+    /**
+     * Gets locations.
+     *
+     * @return the locations
+     */
+    fun getLocations(): Observable<List<LocationEntity>>{
+        return createObservableIO(Callable<List<LocationEntity>> {
+            try {
+                return@Callable locationRoomDAO.getLocations().blockingGet()
+            } catch (e: java.lang.Exception) {
+                return@Callable ArrayList<LocationEntity>()
+            }
+        })
+    }
+
+
+    /**
+     * Find location by name location entity.
+     *
+     * @param name the name
+     * @return the location entity
+     */
+    fun findLocationByName(name: String?): LocationEntity? {
+        return if (!notNull(name)) {
+            null
+        } else try {
+            locationRoomDAO.findLocationByName(name).blockingGet()
+        } catch (e: Exception) {
+            LocationEntity(name!!)
+        }
+    }
+
+    /**
+     * Find location by uuid location entity.
+     *
+     * @param uuid the uuid
+     * @return the location entity
+     */
+    fun findLocationByUUID(uuid: String?): LocationEntity? {
+        return if (!notNull(uuid)) {
+            null
+        } else try {
+            locationRoomDAO.findLocationByUUID(uuid).blockingGet()
+        } catch (e: Exception) {
+            LocationEntity("")
+        }
+    }
+}