refactor(files): Fix nullish operator usage and add missing code comment

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

apps/files/src/components/FileEntry/FileEntryActions.vue

@@ -90,10 +90,9 @@ import NcActionSeparator from '@nextcloud/vue/dist/Components/NcActionSeparator.
 import NcIconSvgWrapper from '@nextcloud/vue/dist/Components/NcIconSvgWrapper.js'
 import NcLoadingIcon from '@nextcloud/vue/dist/Components/NcLoadingIcon.js'
 import ArrowLeftIcon from 'vue-material-design-icons/ArrowLeft.vue'
-
-import { useNavigation } from '../../composables/useNavigation'
 import CustomElementRender from '../CustomElementRender.vue'
 
+import { useNavigation } from '../../composables/useNavigation'
 import logger from '../../logger.js'
 
 // The registered actions list

apps/files/src/components/FileEntryMixin.ts

@@ -50,14 +50,14 @@ export default defineComponent({
 	computed: {
 		currentDir() {
 			// Remove any trailing slash but leave root slash
-			return (this.$route?.query?.dir?.toString() || '/').replace(/^(.+)\/$/, '$1')
+			return (this.$route.query?.dir?.toString() || '/').replace(/^(.+)\/$/, '$1')
 		},
 		currentFileId() {
 			return this.$route.params?.fileid || this.$route.query?.fileid || null
 		},
 
 		fileid() {
-			return this.source?.fileid
+			return this.source.fileid ?? 0
 		},
 		uniqueId() {
 			return hashCode(this.source.source)

apps/files/src/utils/hashUtils.ts

@@ -3,6 +3,11 @@
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 
+/**
+ * Simple non-secure hashing function similar to Java's `hashCode`
+ * @param str The string to hash
+ * @return {number} a non secure hash of the string
+ */
 export const hashCode = function(str: string): number {
 	let hash = 0
 	for (let i = 0; i < str.length; i++) {