Fix listItems isSeparator function, add m() children to attrs, work on posts, subtree retainer

js/src/common/Application.ts

@@ -1,4 +1,4 @@
-import Mithril from "mithril";
+import Mithril from 'mithril';
 
 import Bus from './Bus';
 import Translator from './Translator';

js/src/common/components/ModalManager.tsx

@@ -1,6 +1,6 @@
 import MicroModal from 'micromodal';
 
-import Component from "../Component";
+import Component from '../Component';
 import Modal from './Modal';
 
 /**
@@ -106,7 +106,7 @@ export default class ModalManager extends Component {
      * @protected
      */
     onready() {
-        if (this.component && this.component.onready) {
+        if (this.component?.onready) {
             this.component.onready();
         }
     }

js/src/common/components/Placeholder.tsx

@@ -0,0 +1,19 @@
+import Component, {ComponentProps} from '../Component';
+
+export interface PlaceholderProps extends ComponentProps {
+    text: string
+}
+
+/**
+ * The `Placeholder` component displays a muted text with some call to action,
+ * usually used as an empty state.
+ */
+export default class Placeholder extends Component<PlaceholderProps> {
+    view() {
+        return (
+            <div className="Placeholder">
+                <p>{this.props.text}</p>
+            </div>
+        );
+    }
+}

js/src/common/helpers/listItems.tsx

@@ -1,7 +1,7 @@
 import Separator from '../components/Separator';
 
 export function isSeparator(item) {
-  return item && item.component === Separator;
+  return item?.tag === Separator;
 }
 
 export function withoutUnnecessarySeparators(items) {

js/src/common/helpers/userOnline.tsx

@@ -0,0 +1,14 @@
+import icon from './icon';
+import User from '../models/User';
+
+/**
+ * The `useronline` helper displays a green circle if the user is online
+ *
+ * @param {User} user
+ * @return {Object}
+ */
+export default function userOnline(user: User) {
+    if (user.lastSeenAt() && user.isOnline()) {
+        return <span className="UserOnline">{icon('fas fa-circle')}</span>;
+    }
+}

js/src/common/models/User.ts

@@ -3,7 +3,7 @@ import stringToColor from '../utils/stringToColor';
 import ItemList from '../utils/ItemList';
 import computed from '../utils/computed';
 import GroupBadge from '../components/GroupBadge';
-import Group from "./Group";
+import Group from './Group';
 
 export default class User extends Model {
   username = Model.attribute('username') as () => string;

js/src/common/utils/ItemList.ts

@@ -39,7 +39,7 @@ export default class ItemList<T = any> {
      * Get the content of an item.
      */
     get(key: any): T {
-        return this.items[key].content;
+        return this.items[key]?.content;
     }
 
     /**
@@ -66,6 +66,7 @@ export default class ItemList<T = any> {
                 if (this.items[i] !== null && this.items[i] instanceof Item) {
                     this.items[i].content = Object(this.items[i].content);
 
+                    // @ts-ignore
                     this.items[i].content.itemName = i;
                     items.push(this.items[i]);
                     this.items[i].key = items.length;

js/src/common/utils/SubtreeRetainer.ts

@@ -0,0 +1,30 @@
+export default class SubtreeRetainer {
+    callbacks: Function[];
+    data = {};
+
+    constructor(...callbacks: Function[]) {
+        this.callbacks = callbacks;
+    }
+
+    check(...callbacks: Function[]) {
+        this.callbacks.concat(...callbacks);
+    }
+
+    /**
+     * Return whether the component should redraw.
+     */
+    update(): boolean {
+        let update = false;
+
+        this.callbacks.forEach((callback, i) => {
+            const result = callback();
+
+            if (result !== this.data[i]) {
+                this.data[i] = result;
+                update = true;
+            }
+        });
+
+        return update;
+    }
+}

js/src/common/utils/patchMithril.ts

@@ -1,10 +1,29 @@
 import m from 'mithril';
 import prop from 'mithril/stream';
 
+import Component from '../Component';
+
 export default () => {
     const mo = window['m'];
 
     const _m = function (comp, ...args) {
+        if (!arguments[1]) arguments[1] = {};
+
+        if (comp.prototype && comp.prototype instanceof Component) {
+            let children = args.slice(1);
+            if (children.length === 1 && Array.isArray(children[0])) {
+                children = children[0];
+            }
+
+            if (children) {
+                Object.defineProperty(arguments[1], 'children', {
+                    writable: true,
+                });
+
+                arguments[1].children = (arguments[1].children || []).concat(children);
+            }
+        }
+
         const node = mo.apply(this, arguments);
 
         if (!node.attrs) node.attrs = {};

js/src/forum/components/CommentPost.tsx

@@ -0,0 +1,151 @@
+import Post from './Post';
+import PostUser from './PostUser';
+// import PostMeta from './PostMeta';
+// import PostEdited from './PostEdited';
+// import EditPostComposer from './EditPostComposer';
+import ItemList from '../../common/utils/ItemList';
+import listItems from '../../common/helpers/listItems';
+import Button from '../../common/components/Button';
+
+/**
+ * The `CommentPost` component displays a standard `comment`-typed post. This
+ * includes a number of item lists (controls, header, and footer) surrounding
+ * the post's HTML content.
+ */
+export default class CommentPost extends Post {
+    /**
+     * If the post has been hidden, then this flag determines whether or not its
+     * content has been expanded.
+     */
+    revealContent: boolean = false;
+
+    postUser: PostUser;
+
+    oninit(vnode) {
+        super.oninit(vnode);
+
+        // Create an instance of the component that displays the post's author so
+        // that we can force the post to rerender when the user card is shown.
+        this.postUser = PostUser.component({post: this.props.post});
+
+        this.subtree.check(
+            () => this.postUser.cardVisible,
+            () => this.isEditing()
+        );
+    }
+
+    content() {
+        // Note: we avoid using JSX for the <ul> below because it results in some
+        // weirdness in Mithril.js 0.1.x (see flarum/core#975). This workaround can
+        // be reverted when we upgrade to Mithril 1.0.
+        return super.content().concat([
+            <header className="Post-header">{m('ul', listItems(this.headerItems().toArray()))}</header>,
+            <div className="Post-body">
+                {this.isEditing()
+                    ? <div className="Post-preview" config={this.configPreview.bind(this)}/>
+                    : m.trust(this.props.post.contentHtml())}
+            </div>
+        ]);
+    }
+
+    onupdate(vnode) {
+        super.onupdate(vnode);
+
+        const contentHtml = this.isEditing() ? '' : this.props.post.contentHtml();
+
+        // TODO: idk what this is supposed to be
+
+        // If the post content has changed since the last render, we'll run through
+        // all of the <script> tags in the content and evaluate them. This is
+        // necessary because TextFormatter outputs them for e.g. syntax highlighting.
+        if (vnode.contentHtml !== contentHtml) {
+            this.$('.Post-body script').each(function() {
+                eval.call(window, $(this).text());
+            });
+        }
+
+        vnode.contentHtml = contentHtml;
+    }
+
+    isEditing() {
+        return false; // TODO
+        // return app.composer?.component instanceof EditPostComposer &&
+        //     app.composer.component.props.post === this.props.post;
+    }
+
+    attrs() {
+        const post = this.props.post;
+        const attrs = super.attrs();
+
+        attrs.className = (attrs.className || '') + ' ' + classNames({
+            'CommentPost': true,
+            'Post--hidden': post.isHidden(),
+            'Post--edited': post.isEdited(),
+            'revealContent': this.revealContent,
+            'editing': this.isEditing()
+        });
+
+        return attrs;
+    }
+
+    // TODO change so it works
+    configPreview(element, isInitialized, context) {
+        if (isInitialized) return;
+
+        // Every 50ms, if the composer content has changed, then update the post's
+        // body with a preview.
+        let preview;
+        const updatePreview = () => {
+            const content = app.composer.component.content();
+
+            if (preview === content) return;
+
+            preview = content;
+
+            s9e.TextFormatter.preview(preview || '', element);
+        };
+        updatePreview();
+
+        const updateInterval = setInterval(updatePreview, 50);
+        context.onunload = () => clearInterval(updateInterval);
+    }
+
+    /**
+     * Toggle the visibility of a hidden post's content.
+     */
+    toggleContent() {
+        this.revealContent = !this.revealContent;
+    }
+
+    /**
+     * Build an item list for the post's header.
+     *
+     * @return {ItemList}
+     */
+    headerItems() {
+        const items = new ItemList();
+        const post = this.props.post;
+        const props = {post};
+
+        items.add('user', this.postUser, 100);
+        // items.add('meta', PostMeta.component(props));
+
+        if (post.isEdited() && !post.isHidden()) {
+            items.add('edited', PostEdited.component(props));
+        }
+
+        // If the post is hidden, add a button that allows toggling the visibility
+        // of the post's content.
+        if (post.isHidden()) {
+            items.add('toggle', (
+                Button.component({
+                    className: 'Button Button--default Button--more',
+                    icon: 'fas fa-ellipsis-h',
+                    onclick: this.toggleContent.bind(this)
+                })
+            ));
+        }
+
+        return items;
+    }
+}

js/src/forum/components/Post.tsx

@@ -0,0 +1,118 @@
+import Component, {ComponentProps} from '../../common/Component';
+import Dropdown from '../../common/components/Dropdown';
+import PostControls from '../utils/PostControls';
+import listItems from '../../common/helpers/listItems';
+import ItemList from '../../common/utils/ItemList';
+import SubtreeRetainer from "../../common/utils/SubtreeRetainer";
+import PostModel from '../../common/models/Post';
+
+export interface PostProps extends ComponentProps {
+    post: PostModel
+}
+
+/**
+ * The `Post` component displays a single post. The basic post template just
+ * includes a controls dropdown; subclasses must implement `content` and `attrs`
+ * methods.
+ *
+ * @abstract
+ */
+export default class Post<T extends PostProps = PostProps> extends Component<PostProps> {
+    loading = false;
+    controlsOpen = false;
+
+    subtree: SubtreeRetainer;
+
+    oninit(vnode) {
+        super.oninit(vnode);
+
+        /**
+         * Set up a subtree retainer so that the post will not be redrawn
+         * unless new data comes in.
+         */
+        this.subtree = new SubtreeRetainer(
+            () => this.props.post.freshness,
+            () => {
+                const user = this.props.post.user();
+                return user?.freshness;
+            },
+            () => this.controlsOpen
+        );
+    }
+
+    view() {
+        const controls = PostControls.controls(this.props.post, this).toArray();
+        const attrs = this.attrs();
+
+        attrs.className = classNames('Post', this.loading && 'Post--loading', attrs.className);
+
+        return (
+            <article {...attrs}>
+                <div>
+                    {this.content()}
+                    <aside className="Post-actions">
+                        <ul>
+                            {listItems(this.actionItems().toArray())}
+                            {controls.length ? <li>
+                                <Dropdown
+                                    className="Post-controls"
+                                    buttonClassName="Button Button--icon Button--flat"
+                                    menuClassName="Dropdown-menu--right"
+                                    icon="fas fa-ellipsis-h"
+                                    onshow={() => this.$('.Post-actions').addClass('open')}
+                                    onhide={() => this.$('.Post-actions').removeClass('open')}>
+                                    {controls}
+                                </Dropdown>
+                            </li> : ''}
+                        </ul>
+                    </aside>
+                    <footer className="Post-footer"><ul>{listItems(this.footerItems().toArray())}</ul></footer>
+                </div>
+                );
+            </article>
+        );
+    }
+
+    onbeforeupdate(vnode) {
+        super.onbeforeupdate(vnode);
+
+        return this.subtree.update();
+    }
+
+    oncreate(vnode) {
+        super.oncreate(vnode);
+
+        const $actions = this.$('.Post-actions');
+        const $controls = this.$('.Post-controls');
+
+        $actions.toggleClass('open', $controls.hasClass('open'));
+    }
+
+    /**
+     * Get attributes for the post element.
+     */
+    attrs(): ComponentProps {
+        return {};
+    }
+
+    /**
+     * Get the post's content.
+     */
+    content() {
+        return [];
+    }
+
+    /**
+     * Build an item list for the post's actions.
+     */
+    actionItems() {
+        return new ItemList();
+    }
+
+    /**
+     * Build an item list for the post's footer.
+     */
+    footerItems() {
+        return new ItemList();
+    }
+}

js/src/forum/components/PostUser.tsx

@@ -0,0 +1,94 @@
+import Component from '../../common/Component';
+import UserCard from './UserCard';
+import avatar from '../../common/helpers/avatar';
+import username from '../../common/helpers/username';
+import userOnline from '../../common/helpers/userOnline';
+import listItems from '../../common/helpers/listItems';
+import {PostProps} from "./Post";
+
+/**
+ * The `PostUser` component shows the avatar and username of a post's author.
+ */
+export default class PostUser extends Component<PostProps> {
+    /**
+     * Whether or not the user hover card is visible.
+     */
+    cardVisible = false;
+
+    view() {
+        const post = this.props.post;
+        const user = post.user();
+
+        if (!user) {
+            return (
+                <div className="PostUser">
+                    <h3>{avatar(user, {className: 'PostUser-avatar'})} {username(user)}</h3>
+                </div>
+            );
+        }
+
+        let card = '';
+
+        if (!post.isHidden() && this.cardVisible) {
+            card = UserCard.component({
+                user,
+                className: 'UserCard--popover',
+                controlsButtonClassName: 'Button Button--icon Button--flat'
+            });
+        }
+
+        return (
+            <div className="PostUser">
+                <h3>
+                    <m.route.Link href={app.route.user(user)}>
+                        {avatar(user, {className: 'PostUser-avatar'})}
+                        {userOnline(user)}
+                        {username(user)}
+                    </m.route.Link>
+                </h3>
+                <ul className="PostUser-badges badges">
+                    {listItems(user.badges().toArray())}
+                </ul>
+                {card}
+            </div>
+        );
+    }
+
+    oncreate(vnode) {
+        super.oncreate(vnode);
+
+        let timeout;
+
+        this.$()
+            .on('mouseover', 'h3 a, .UserCard', () => {
+                clearTimeout(timeout);
+                timeout = setTimeout(this.showCard.bind(this), 500);
+            })
+            .on('mouseout', 'h3 a, .UserCard', () => {
+                clearTimeout(timeout);
+                timeout = setTimeout(this.hideCard.bind(this), 250);
+            });
+    }
+
+    /**
+     * Show the user card.
+     */
+    showCard() {
+        this.cardVisible = true;
+
+        m.redraw();
+
+        setTimeout(() => this.$('.UserCard').addClass('in'));
+    }
+
+    /**
+     * Hide the user card.
+     */
+    hideCard() {
+        this.$('.UserCard').removeClass('in')
+            .one('transitionend webkitTransitionEnd oTransitionEnd', () => {
+                this.cardVisible = false;
+                m.redraw();
+            });
+    }
+}

js/src/forum/components/PostsUserPage.tsx

@@ -1,9 +1,9 @@
 import UserPage from './UserPage';
 import LoadingIndicator from '../../common/components/LoadingIndicator';
 import Button from '../../common/components/Button';
-// import Placeholder from '../../common/components/Placeholder';
-// import CommentPost from './CommentPost';
-import Post from "../../common/models/Post";
+import Placeholder from '../../common/components/Placeholder';
+import CommentPost from './CommentPost';
+import Post from '../../common/models/Post';
 
 /**
  * The `PostsUserPage` component shows a user's activity feed inside of their
@@ -43,8 +43,6 @@ export default class PostsUserPage extends UserPage {
   }
 
   content() {
-    return <p>test</p>;
-
     if (this.posts.length === 0 && ! this.loading) {
       return (
         <div className="PostsUserPage">

js/src/forum/components/UsersSearchSource.tsx

@@ -1,7 +1,7 @@
 import highlight from '../../common/helpers/highlight';
 import avatar from '../../common/helpers/avatar';
 import username from '../../common/helpers/username';
-import SearchSource from "./SearchSource";
+import SearchSource from './SearchSource';
 import User from '../../common/models/User';
 
 /**

js/src/forum/utils/PostControls.tsx

@@ -0,0 +1,175 @@
+import {Vnode} from "mithril";
+
+// import EditPostComposer from '../components/EditPostComposer';
+import Button from '../../common/components/Button';
+import Separator from '../../common/components/Separator';
+import ItemList from '../../common/utils/ItemList';
+import Post from "../../common/models/Post";
+import PostComponent from "../../forum/components/Post";
+
+/**
+ * The `PostControls` utility constructs a list of buttons for a post which
+ * perform actions on it.
+ */
+export default {
+    /**
+     * Get a list of controls for a post.
+     *
+     * @param {Post} post
+     * @param {*} context The parent component under which the controls menu will
+     *     be displayed.
+     * @public
+     */
+    controls(post: Post, context) {
+        const items = new ItemList();
+
+        ['user', 'moderation', 'destructive'].forEach(section => {
+            const controls = this[section + 'Controls'](post, context).toArray();
+
+            if (controls.length) {
+                controls.forEach(item => items.add(item.itemName, item));
+                items.add(section + 'Separator', Separator.component());
+            }
+        });
+
+        return items;
+    },
+
+    /**
+     * Get controls for a post pertaining to the current user (e.g. report).
+     *
+     * @param {Post} post
+     * @param {*} context The parent component under which the controls menu will
+     *     be displayed.
+     * @protected
+     */
+    userControls(post: Post, context) {
+        return new ItemList();
+    },
+
+    /**
+     * Get controls for a post pertaining to moderation (e.g. edit).
+     *
+     * @param {Post} post
+     * @param {*} context The parent component under which the controls menu will
+     *     be displayed.
+     * @protected
+     */
+    moderationControls(post: Post, context) {
+        const items = new ItemList();
+
+        if (post.contentType() === 'comment' && post.canEdit()) {
+            if (!post.isHidden()) {
+                items.add('edit', Button.component({
+                    icon: 'fas fa-pencil-alt',
+                    onclick: this.editAction.bind(post)
+                }, app.translator.trans('core.forum.post_controls.edit_button')));
+            }
+        }
+
+        return items;
+    },
+
+    /**
+     * Get controls for a post that are destructive (e.g. delete).
+     *
+     * @param {Post} post
+     * @param {*} context The parent component under which the controls menu will
+     *     be displayed.
+     * @protected
+     */
+    destructiveControls(post: Post, context) {
+        const items = new ItemList();
+
+        if (post.contentType() === 'comment' && !post.isHidden()) {
+            if (post.canHide()) {
+                items.add('hide', Button.component({
+                    icon: 'far fa-trash-alt',
+                    children: app.translator.trans('core.forum.post_controls.delete_button'),
+                    onclick: this.hideAction.bind(post)
+                }));
+            }
+        } else {
+            if (post.contentType() === 'comment' && post.canHide()) {
+                items.add('restore', Button.component({
+                    icon: 'fas fa-reply',
+                    children: app.translator.trans('core.forum.post_controls.restore_button'),
+                    onclick: this.restoreAction.bind(post)
+                }));
+            }
+            if (post.canDelete()) {
+                items.add('delete', Button.component({
+                    icon: 'fas fa-times',
+                    children: app.translator.trans('core.forum.post_controls.delete_forever_button'),
+                    onclick: this.deleteAction.bind(post, context)
+                }));
+            }
+        }
+
+        return items;
+    },
+
+    /**
+     * Open the composer to edit a post.
+     */
+    editAction(this: Post) {
+        return new Promise<EditPostComposer>(resolve => {
+            const component = new EditPostComposer({ post: this });
+
+            app.composer.load(component);
+            app.composer.show();
+
+            resolve(component);
+        });
+    },
+
+    /**
+     * Hide a post.
+     */
+    hideAction(this: Post) {
+        this.pushAttributes({ hiddenAt: new Date(), hiddenUser: app.session.user });
+
+        return this.save({ isHidden: true }).then(() => m.redraw());
+    },
+
+    /**
+     * Restore a post.
+     */
+    restoreAction(this: Post) {
+        this.pushAttributes({ hiddenAt: null, hiddenUser: null });
+
+        return this.save({ isHidden: false }).then(() => m.redraw());
+    },
+
+    /**
+     * Delete a post.
+     */
+    deleteAction(this: Post, context: PostComponent) {
+        if (context) context.loading = true;
+
+        return this.delete()
+            .then(() => {
+                const discussion = this.discussion();
+
+                discussion.removePost(this.id());
+
+                // If this was the last post in the discussion, then we will assume that
+                // the whole discussion was deleted too.
+                if (!discussion.postIds().length) {
+                    // If there is a discussion list in the cache, remove this discussion.
+                    if (app.cache.discussionList) {
+                        app.cache.discussionList.removeDiscussion(discussion);
+                    }
+
+                    if (app.viewingDiscussion(discussion)) {
+                        app.history.back();
+                    }
+                }
+            })
+            .catch(() => {})
+            .then(() => {
+                if (context) context.loading = false;
+                m.redraw();
+            });
+    }
+};