frontend/src/components/tasks/partials/comments.vue

<template>
	<div class="content details" :class="{'has-top-border': canWrite || comments.length > 0}">
		<h1 v-if="canWrite || comments.length > 0">
			<span class="icon is-grey">
				<icon :icon="['far', 'comments']"/>
			</span>
			Comments
		</h1>
		<div class="comments">
			<progress class="progress is-small is-info" max="100" v-if="taskCommentService.loading">Loading
				comments...
			</progress>
			<div class="media comment" v-for="c in comments" :key="c.id">
				<figure class="media-left">
					<img class="image is-avatar" :src="c.author.getAvatarUrl(48)" alt="" width="48" height="48"/>
				</figure>
				<div class="media-content">
					<div class="comment-info" :class="{'is-pulled-up': canWrite}">
						<strong>{{ c.author.username }}</strong>&nbsp;
						<small v-tooltip="formatDate(c.created)">{{ formatDateSince(c.created) }}</small>
						<small v-if="+new Date(c.created) !== +new Date(c.updated)" v-tooltip="formatDate(c.updated)"> ·
							edited {{ formatDateSince(c.updated) }}</small>
					</div>
					<editor
							v-model="c.comment"
							:has-preview="true"
							@change="() => {toggleEdit(c);editComment()}"
							:upload-enabled="true"
							:upload-callback="attachmentUpload"
							:is-edit-enabled="canWrite"
					/>
					<div class="comment-actions" v-if="canWrite">
						<a @click="toggleDelete(c.id)">Remove</a>
					</div>
				</div>
			</div>
			<div class="media comment" v-if="canWrite">
				<figure class="media-left">
					<img class="image is-avatar" :src="userAvatar" alt="" width="48" height="48"/>
				</figure>
				<div class="media-content">
					<div class="form">
						<div class="field">
							<editor
									placeholder="Add your comment..."
									:class="{'is-loading': taskCommentService.loading && !isCommentEdit}"
									v-model="newComment.comment"
									:has-preview="false"
									:upload-enabled="true"
									:upload-callback="attachmentUpload"
									v-if="editorActive"
							/>
						</div>
						<div class="field">
							<button class="button is-primary"
									:class="{'is-loading': taskCommentService.loading && !isCommentEdit}"
									@click="addComment()" :disabled="newComment.comment === ''">Comment
							</button>
						</div>
					</div>
				</div>
			</div>
		</div>
		<modal
				v-if="showDeleteModal"
				@close="showDeleteModal = false"
				@submit="deleteComment()">
			<span slot="header">Delete this comment</span>
			<p slot="text">Are you sure you want to delete this comment?
				<br/>This <b>CANNOT BE UNDONE!</b></p>
		</modal>
	</div>
</template>

<script>
	import TaskCommentService from '../../../services/taskComment'
	import TaskCommentModel from '../../../models/taskComment'
	import attachmentUpload from '../mixins/attachmentUpload'
	import LoadingComponent from '../../misc/loading'
	import ErrorComponent from '../../misc/error'

	export default {
		name: 'comments',
		components: {
			editor: () => ({
				component: import(/* webpackPrefetch: true *//* webpackChunkName: "editor" */ '../../input/editor'),
				loading: LoadingComponent,
				error: ErrorComponent,
				timeout: 60000,
			}),
		},
		mixins: [
			attachmentUpload,
		],
		props: {
			taskId: {
				type: Number,
				required: true,
			},
			canWrite: {
				default: true,
			},
		},
		data() {
			return {
				comments: [],

				showDeleteModal: false,
				commentToDelete: TaskCommentModel,

				isCommentEdit: false,
				commentEdit: TaskCommentModel,

				taskCommentService: TaskCommentService,
				newComment: TaskCommentModel,
				editorActive: true,
			}
		},
		created() {
			this.taskCommentService = new TaskCommentService()
			this.newComment = new TaskCommentModel({taskId: this.taskId})
			this.commentEdit = new TaskCommentModel({taskId: this.taskId})
			this.commentToDelete = new TaskCommentModel({taskId: this.taskId})
			this.comments = []
		},
		mounted() {
			this.loadComments()
		},
		watch: {
			taskId() {
				this.loadComments()
			},
		},
		computed: {
			userAvatar() {
				return this.$store.state.auth.info.getAvatarUrl(48)
			},
		},
		methods: {
			loadComments() {
				this.taskCommentService.getAll({taskId: this.taskId})
					.then(r => {
						this.$set(this, 'comments', r)
					})
					.catch(e => {
						this.error(e, this)
					})
			},
			addComment() {
				if (this.newComment.comment === '') {
					return
				}

				// This makes the editor trigger its mounted function again which makes it forget every input
				// it currently has in its textarea. This is a counter-hack to a hack inside of vue-easymde
				// which made it impossible to detect change from the outside. Therefore the component would
				// not update if new content from the outside was made available.
				// See https://github.com/NikulinIlya/vue-easymde/issues/3
				this.editorActive = false
				this.$nextTick(() => this.editorActive = true)

				this.taskCommentService.create(this.newComment)
					.then(r => {
						this.comments.push(r)
						this.newComment.comment = ''
					})
					.catch(e => {
						this.error(e, this)
					})
			},
			toggleEdit(comment) {
				this.isCommentEdit = !this.isCommentEdit
				this.commentEdit = comment
			},
			toggleDelete(commentId) {
				this.showDeleteModal = !this.showDeleteModal
				this.commentToDelete.id = commentId
			},
			editComment() {
				if (this.commentEdit.comment === '') {
					return
				}
				this.commentEdit.taskId = this.taskId
				this.taskCommentService.update(this.commentEdit)
					.then(r => {
						for (const c in this.comments) {
							if (this.comments[c].id === this.commentEdit.id) {
								this.$set(this.comments, c, r)
							}
						}
					})
					.catch(e => {
						this.error(e, this)
					})
					.finally(() => {
						this.isCommentEdit = false
					})
			},
			deleteComment() {
				this.taskCommentService.delete(this.commentToDelete)
					.then(() => {
						for (const a in this.comments) {
							if (this.comments[a].id === this.commentToDelete.id) {
								this.comments.splice(a, 1)
							}
						}
					})
					.catch(e => {
						this.error(e, this)
					})
					.finally(() => {
						this.showDeleteModal = false
					})
			},
		},
	}
</script>