Re implement the navigation

Signed-off-by: Michael Weimann <mail@michael-weimann.eu>

src/components/navigation/AppNavigationBoardCategory.vue

@@ -0,0 +1,98 @@
+<!--
+  - @copyright Copyright (c) 2018 John Molakvoæ <skjnldsv@protonmail.com>
+  -
+  - @author John Molakvoæ <skjnldsv@protonmail.com>
+  -
+  - @license GNU AGPL version 3 or any later version
+  -
+  - This program is free software: you can redistribute it and/or modify
+  - it under the terms of the GNU Affero General Public License as
+  - published by the Free Software Foundation, either version 3 of the
+  - License, or (at your option) any later version.
+  -
+  - This program is distributed in the hope that it will be useful,
+  - but WITHOUT ANY WARRANTY; without even the implied warranty of
+  - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+  - GNU Affero General Public License for more details.
+  -
+  - You should have received a copy of the GNU Affero General Public License
+  - along with this program. If not, see <http://www.gnu.org/licenses/>.
+  -
+  -->
+<template>
+	<li :id="id" :title="text" :class="{'open': opened, 'collapsible': collapsible }">
+		<button v-if="collapsible" class="collapse" @click.prevent.stop="toggleCollapse" />
+		<a :class="icon" href="#">
+			{{ text }}
+		</a>
+		<ul v-if="boards.length > 0">
+			<app-navigation-board v-for="board in boards" :key="board.id" :board="board" />
+		</ul>
+	</li>
+</template>
+
+<script>
+import { PopoverMenu } from 'nextcloud-vue'
+import ClickOutside from 'vue-click-outside'
+import AppNavigationBoard from './AppNavigationBoard'
+
+export default {
+	name: 'AppNavigationBoardCategory',
+	components: {
+		AppNavigationBoard,
+		PopoverMenu
+	},
+	directives: {
+		ClickOutside
+	},
+	props: {
+		id: {
+			type: String,
+			required: true
+		},
+		text: {
+			type: String,
+			required: true
+		},
+		icon: {
+			type: String,
+			required: true
+		},
+		boards: {
+			type: Array,
+			required: true
+		},
+		/**
+		 * Control whether the category should be opened when adding boards.
+		 * This is for example used in the case a new board has been added, so the user directly sees it.
+		 */
+		openOnAddBoards: {
+			type: Boolean,
+			default: false
+		}
+	},
+	data() {
+		return {
+			opened: false
+		}
+	},
+	computed: {
+		collapsible() {
+			return this.boards.length > 0
+		}
+	},
+	watch: {
+		boards: function(newVal, prevVal) {
+			if (this.openOnAddBoards === true && prevVal.length < newVal.length) {
+				this.opened = true
+			}
+		}
+	},
+	mounted() {},
+	methods: {
+		toggleCollapse() {
+			this.opened = !this.opened
+		}
+	}
+}
+</script>