From 4de6e807714560329e55c3ed09d6ff029a1eb6df Mon Sep 17 00:00:00 2001
From: "John Molakvoæ (skjnldsv)" <skjnldsv@protonmail.com>
Date: Sun, 4 Oct 2020 13:49:57 +0200
Subject: Upgrade lifecycle and vue parent context
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Signed-off-by: John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>
Signed-off-by: npmbuildbot[bot] <npmbuildbot[bot]@users.noreply.github.com>
---
 apps/files/src/components/SidebarTab.vue | 56 +++++++++++++++++-----
 apps/files/src/models/Tab.js             | 36 ++++++++++----
 apps/files/src/sidebar.js                |  2 +
 apps/files/src/views/Sidebar.vue         | 81 +++++++++++++-------------------
 4 files changed, 106 insertions(+), 69 deletions(-)

(limited to 'apps/files/src')

diff --git a/apps/files/src/components/SidebarTab.vue b/apps/files/src/components/SidebarTab.vue
index ecf04e9c9b3..1fc93486bc0 100644
--- a/apps/files/src/components/SidebarTab.vue
+++ b/apps/files/src/components/SidebarTab.vue
@@ -23,21 +23,28 @@
 <template>
 	<AppSidebarTab
 		:id="id"
+		ref="tab"
 		:name="name"
 		:icon="icon">
+		<!-- Fallback loading -->
+		<EmptyContent v-if="loading" icon="icon-loading" />
+
 		<!-- Using a dummy div as Vue mount replace the element directly
 			It does NOT append to the content -->
-		<div ref="mount"></div>
+		<div ref="mount" />
 	</AppSidebarTab>
 </template>
 
 <script>
 import AppSidebarTab from '@nextcloud/vue/dist/Components/AppSidebarTab'
+import EmptyContent from '@nextcloud/vue/dist/Components/EmptyContent'
+
 export default {
 	name: 'SidebarTab',
 
 	components: {
 		AppSidebarTab,
+		EmptyContent,
 	},
 
 	props: {
@@ -58,36 +65,61 @@ export default {
 			type: String,
 			required: true,
 		},
-		render: {
+
+		/**
+		 * Lifecycle methods.
+		 * They are prefixed with `on` to avoid conflict with Vue
+		 * methods like this.destroy
+		 */
+		onMount: {
 			type: Function,
 			required: true,
 		},
+		onUpdate: {
+			type: Function,
+			required: true,
+		},
+		onDestroy: {
+			type: Function,
+			required: true,
+		},
+	},
+
+	data() {
+		return {
+			loading: true,
+		}
 	},
 
 	computed: {
-		// TODO: implement a better way to force pass a prop fromm Sidebar
+		// TODO: implement a better way to force pass a prop from Sidebar
 		activeTab() {
 			return this.$parent.activeTab
 		},
 	},
 
 	watch: {
-		fileInfo(newFile, oldFile) {
+		async fileInfo(newFile, oldFile) {
+			// Update fileInfo on change
 			if (newFile.id !== oldFile.id) {
-				this.mountTab()
+				this.loading = true
+				await this.onUpdate(this.fileInfo)
+				this.loading = false
 			}
 		},
 	},
 
-	mounted() {
-		this.mountTab()
+	async mounted() {
+		this.loading = true
+		// Mount the tab:  mounting point,   fileInfo,      vue context
+		await this.onMount(this.$refs.mount, this.fileInfo, this.$refs.tab)
+		this.loading = false
 	},
 
-	methods: {
-		mountTab() {
-			// Mount the tab into this component
-			this.render(this.$refs.mount, this.fileInfo)
-		},
+	async beforeDestroy() {
+		// unmount the tab
+		await this.onDestroy()
 	},
+
 }
 </script>
diff --git a/apps/files/src/models/Tab.js b/apps/files/src/models/Tab.js
index 753b9c9c282..2c587e5f70a 100644
--- a/apps/files/src/models/Tab.js
+++ b/apps/files/src/models/Tab.js
@@ -25,7 +25,9 @@ export default class Tab {
 	#id
 	#name
 	#icon
-	#render
+	#mount
+	#update
+	#destroy
 	#enabled
 
 	/**
@@ -35,10 +37,12 @@ export default class Tab {
 	 * @param {string} options.id the unique id of this tab
 	 * @param {string} options.name the translated tab name
 	 * @param {string} options.icon the vue component
-	 * @param {Function} options.render function to render the tab
+	 * @param {Function} options.mount function to mount the tab
+	 * @param {Function} options.update function to update the tab
+	 * @param {Function} options.destroy function to destroy the tab
 	 * @param {Function} [options.enabled] define conditions whether this tab is active. Must returns a boolean
 	 */
-	constructor({ id, name, icon, render, enabled }) {
+	constructor({ id, name, icon, mount, update, destroy, enabled } = {}) {
 		if (enabled === undefined) {
 			enabled = () => true
 		}
@@ -53,8 +57,14 @@ export default class Tab {
 		if (typeof icon !== 'string' || icon.trim() === '') {
 			throw new Error('The icon argument is not a valid string')
 		}
-		if (typeof render !== 'function') {
-			throw new Error('The render argument should be a function')
+		if (typeof mount !== 'function') {
+			throw new Error('The mount argument should be a function')
+		}
+		if (typeof update !== 'function') {
+			throw new Error('The update argument should be a function')
+		}
+		if (typeof destroy !== 'function') {
+			throw new Error('The destroy argument should be a function')
 		}
 		if (typeof enabled !== 'function') {
 			throw new Error('The enabled argument should be a function')
@@ -63,7 +73,9 @@ export default class Tab {
 		this.#id = id
 		this.#name = name
 		this.#icon = icon
-		this.#render = render
+		this.#mount = mount
+		this.#update = update
+		this.#destroy = destroy
 		this.#enabled = enabled
 
 	}
@@ -80,8 +92,16 @@ export default class Tab {
 		return this.#icon
 	}
 
-	get render() {
-		return this.#render
+	get mount() {
+		return this.#mount
+	}
+
+	get update() {
+		return this.#update
+	}
+
+	get destroy() {
+		return this.#destroy
 	}
 
 	get enabled() {
diff --git a/apps/files/src/sidebar.js b/apps/files/src/sidebar.js
index 508093465d4..54293bd24c8 100644
--- a/apps/files/src/sidebar.js
+++ b/apps/files/src/sidebar.js
@@ -21,6 +21,8 @@
  */
 
 import Vue from 'vue'
+import { translate as t } from '@nextcloud/l10n'
+
 import SidebarView from './views/Sidebar.vue'
 import Sidebar from './services/Sidebar'
 import Tab from './models/Tab'
diff --git a/apps/files/src/views/Sidebar.vue b/apps/files/src/views/Sidebar.vue
index 6fa5c35dca2..664bc6f4075 100644
--- a/apps/files/src/views/Sidebar.vue
+++ b/apps/files/src/views/Sidebar.vue
@@ -52,33 +52,38 @@
 		</template>
 
 		<!-- Error display -->
-		<div v-if="error" class="emptycontent">
-			<div class="icon-error" />
-			<h2>{{ error }}</h2>
-		</div>
+		<EmptyContent v-if="error" icon="icon-error">
+			{{ error }}
+		</EmptyContent>
 
-		<!-- If fileInfo fetch is complete, display tabs -->
-		<template v-else-if="fileInfo" v-for="tab in tabs">
+		<!-- If fileInfo fetch is complete, render tabs -->
+		<template v-for="tab in tabs" v-else-if="fileInfo">
+			<!-- Hide them if we're loading another file but keep them mounted -->
 			<SidebarTab
 				v-if="tab.enabled(fileInfo)"
+				v-show="!loading"
 				:id="tab.id"
 				:key="tab.id"
 				:name="tab.name"
 				:icon="tab.icon"
-				:render="tab.render"
+				:on-mount="tab.mount"
+				:on-update="tab.update"
+				:on-destroy="tab.destroy"
 				:file-info="fileInfo" />
 		</template>
 	</AppSidebar>
 </template>
 <script>
+import { encodePath } from '@nextcloud/paths'
 import $ from 'jquery'
 import axios from '@nextcloud/axios'
 import AppSidebar from '@nextcloud/vue/dist/Components/AppSidebar'
 import ActionButton from '@nextcloud/vue/dist/Components/ActionButton'
+import EmptyContent from '@nextcloud/vue/dist/Components/EmptyContent'
+
 import FileInfo from '../services/FileInfo'
 import SidebarTab from '../components/SidebarTab'
 import LegacyView from '../components/LegacyView'
-import { encodePath } from '@nextcloud/paths'
 
 export default {
 	name: 'Sidebar',
@@ -86,8 +91,9 @@ export default {
 	components: {
 		ActionButton,
 		AppSidebar,
-		SidebarTab,
+		EmptyContent,
 		LegacyView,
+		SidebarTab,
 	},
 
 	data() {
@@ -95,6 +101,7 @@ export default {
 			// reactive state
 			Sidebar: OCA.Files.Sidebar.state,
 			error: null,
+			loading: true,
 			fileInfo: null,
 			starLoading: false,
 		}
@@ -185,15 +192,16 @@ export default {
 		appSidebar() {
 			if (this.fileInfo) {
 				return {
-					background: this.background,
+					'data-mimetype': this.fileInfo.mimetype,
+					'star-loading': this.starLoading,
 					active: this.activeTab,
+					background: this.background,
 					class: { 'has-preview': this.fileInfo.hasPreview },
 					compact: !this.fileInfo.hasPreview,
-					'star-loading': this.starLoading,
+					loading: this.loading,
 					starred: this.fileInfo.isFavourited,
 					subtitle: this.subtitle,
 					title: this.fileInfo.name,
-					'data-mimetype': this.fileInfo.mimetype,
 				}
 			} else if (this.error) {
 				return {
@@ -201,12 +209,12 @@ export default {
 					subtitle: '',
 					title: '',
 				}
-			} else {
-				return {
-					class: 'icon-loading',
-					subtitle: '',
-					title: '',
-				}
+			}
+			// no fileInfo yet, showing empty data
+			return {
+				loading: this.loading,
+				subtitle: '',
+				title: '',
 			}
 		},
 
@@ -241,35 +249,6 @@ export default {
 		},
 	},
 
-	watch: {
-		// update the sidebar data
-		async file(curr, prev) {
-			this.resetData()
-			if (curr && curr.trim() !== '') {
-				try {
-					this.fileInfo = await FileInfo(this.davPath)
-					// adding this as fallback because other apps expect it
-					this.fileInfo.dir = this.file.split('/').slice(0, -1).join('/')
-
-					// DEPRECATED legacy views
-					// TODO: remove
-					this.views.forEach(view => {
-						view.setFileInfo(this.fileInfo)
-					})
-
-					this.$nextTick(() => {
-						if (this.$refs.tabs) {
-							this.$refs.tabs.updateTabs()
-						}
-					})
-				} catch (error) {
-					this.error = t('files', 'Error while loading the file data')
-					console.error('Error while loading the file data', error)
-				}
-			}
-		},
-	},
-
 	methods: {
 		/**
 		 * Can this tab be displayed ?
@@ -403,9 +382,11 @@ export default {
 			// update current opened file
 			this.Sidebar.file = path
 
-			// reset previous data
-			this.resetData()
 			if (path && path.trim() !== '') {
+				// reset data, keep old fileInfo to not reload all tabs and just hide them
+				this.error = null
+				this.loading = true
+
 				try {
 					this.fileInfo = await FileInfo(this.davPath)
 					// adding this as fallback because other apps expect it
@@ -427,6 +408,8 @@ export default {
 					console.error('Error while loading the file data', error)
 
 					throw new Error(error)
+				} finally {
+					this.loading = false
 				}
 			}
 		},
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