[frontend] Custom Emoji Deletion (#994)

* re-add eslint

* fix oauth url getting too long

* actually attach single emoji get and delete routes

* basic emoji details + deletion using rtk query

* refactor emoji upload to rtk query

* clean up old redux api+reducers for custom emoji

* fix validation order

* refactor custom emoji form fields

* remove unused requires

* cleanup, fix most eslint errors

* more small eslint fixes

* fix max emoji size

* tiny bit of function documentation

4 files changed, 358 insertions, 0 deletions

diff --git a/web/source/settings/admin/emoji/detail.js b/web/source/settings/admin/emoji/detail.js
new file mode 100644
index 000000000..cc0f8e73c
--- /dev/null
+++ b/web/source/settings/admin/emoji/detail.js
@@ -0,0 +1,86 @@
+/*
+	GoToSocial
+	Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+	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/>.
+*/
+
+"use strict";
+
+const React = require("react");
+
+const { useRoute, Link, Redirect } = require("wouter");
+
+const BackButton = require("../../components/back-button");
+
+const query = require("../../lib/query");
+
+const base = "/settings/admin/custom-emoji";
+
+/* We wrap the component to generate formFields with a setter depending on the domain
+	 if formFields() is used inside the same component that is re-rendered with their state,
+	 inputs get re-created on every change, causing them to lose focus, and bad performance
+*/
+module.exports = function EmojiDetailWrapped() {
+	let [_match, {emojiId}] = useRoute(`${base}/:emojiId`);
+	const {currentData: emoji, isLoading, error} = query.useGetEmojiQuery(emojiId);
+
+	return (<>
+		{error && <div className="error accent">{error.status}: {error.data.error}</div>}
+		{isLoading
+			? "Loading..."
+			: <EmojiDetail emoji={emoji}/>
+		}
+	</>);
+};
+
+function EmojiDetail({emoji}) {
+	if (emoji == undefined) {
+		return (<>
+			<Link to={base}>
+				<a className="button">go back</a>
+			</Link>
+		</>);
+	}
+
+	return (
+		<div>
+			<h1><BackButton to={base}/> Custom Emoji: {emoji.shortcode}</h1>
+			<DeleteButton id={emoji.id}/>
+			<p>
+				Editing custom emoji isn&apos;t implemented yet.<br/>
+				<a target="_blank" rel="noreferrer" href="https://github.com/superseriousbusiness/gotosocial/issues/797">View implementation progress.</a>
+			</p>
+			<img src={emoji.url} alt={emoji.shortcode} title={`:${emoji.shortcode}:`}/>
+		</div>
+	);
+}
+
+function DeleteButton({id}) {
+	// TODO: confirmation dialog?
+	const [deleteEmoji, deleteResult] = query.useDeleteEmojiMutation();
+
+	let text = "Delete this emoji";
+	if (deleteResult.isLoading) {
+		text = "processing...";
+	}
+
+	if (deleteResult.isSuccess) {
+		return <Redirect to={base}/>;
+	}
+
+	return (
+		<button onClick={() => deleteEmoji(id)} disabled={deleteResult.isLoading}>{text}</button>
+	);
+}
\ No newline at end of file
diff --git a/web/source/settings/admin/emoji/index.js b/web/source/settings/admin/emoji/index.js
new file mode 100644
index 000000000..0fcda8264
--- /dev/null
+++ b/web/source/settings/admin/emoji/index.js
@@ -0,0 +1,40 @@
+/*
+	GoToSocial
+	Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+	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/>.
+*/
+
+"use strict";
+
+const React = require("react");
+const {Switch, Route} = require("wouter");
+
+const EmojiOverview = require("./overview");
+const EmojiDetail = require("./detail");
+
+const base = "/settings/admin/custom-emoji";
+
+module.exports = function CustomEmoji() {
+	return (
+		<>
+			<Switch>
+				<Route path={`${base}/:emojiId`}>
+					<EmojiDetail />
+				</Route>
+				<EmojiOverview />
+			</Switch>
+		</>
+	);
+};
diff --git a/web/source/settings/admin/emoji/new-emoji.js b/web/source/settings/admin/emoji/new-emoji.js
new file mode 100644
index 000000000..e5bc8893d
--- /dev/null
+++ b/web/source/settings/admin/emoji/new-emoji.js
@@ -0,0 +1,133 @@
+/*
+	GoToSocial
+	Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+	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/>.
+*/
+
+"use strict";
+
+const Promise = require('bluebird');
+const React = require("react");
+
+const FakeToot = require("../../components/fake-toot");
+const MutateButton = require("../../components/mutation-button");
+
+const { 
+	useTextInput,
+	useFileInput
+} = require("../../components/form");
+
+const query = require("../../lib/query");
+
+module.exports = function NewEmojiForm({emoji}) {
+	const emojiCodes = React.useMemo(() => {
+		return new Set(emoji.map((e) => e.shortcode));
+	}, [emoji]);
+
+	const [addEmoji, result] = query.useAddEmojiMutation();
+
+	const [onFileChange, resetFile, {image, imageURL, imageInfo}] = useFileInput("image", {
+		withPreview: true,
+		maxSize: 50 * 1024
+	});
+
+	const [onShortcodeChange, resetShortcode, {shortcode, setShortcode, shortcodeRef}] = useTextInput("shortcode", {
+		validator: function validateShortcode(code) {
+			return emojiCodes.has(code)
+				? "Shortcode already in use"
+				: "";
+		}
+	});
+
+	React.useEffect(() => {
+		if (shortcode.length == 0) {
+			if (image != undefined) {
+				let [name, _ext] = image.name.split(".");
+				setShortcode(name);
+			}
+		}
+		// eslint-disable-next-line react-hooks/exhaustive-deps
+	}, [image]);
+
+	function uploadEmoji(e) {
+		if (e) {
+			e.preventDefault();
+		}
+
+		Promise.try(() => {
+			return addEmoji({
+				image,
+				shortcode
+			});
+		}).then(() => {
+			resetFile();
+			resetShortcode();
+		});
+	}
+
+	let emojiOrShortcode = `:${shortcode}:`;
+
+	if (imageURL != undefined) {
+		emojiOrShortcode = <img
+			className="emoji"
+			src={imageURL}
+			title={`:${shortcode}:`}
+			alt={shortcode}
+		/>;
+	}
+
+	return (
+		<div>
+			<h2>Add new custom emoji</h2>
+
+			<FakeToot>
+				Look at this new custom emoji {emojiOrShortcode} isn&apos;t it cool?
+			</FakeToot>
+
+			<form onSubmit={uploadEmoji} className="form-flex">
+				<div className="form-field file">
+					<label className="file-input button" htmlFor="image">
+						Browse
+					</label>
+					{imageInfo}
+					<input
+						className="hidden"
+						type="file"
+						id="image"
+						name="Image"
+						accept="image/png,image/gif"
+						onChange={onFileChange}
+					/>
+				</div>
+
+				<div className="form-field text">
+					<label htmlFor="shortcode">
+						Shortcode, must be unique among the instance's local emoji
+					</label>
+					<input
+						type="text"
+						id="shortcode"
+						name="Shortcode"
+						ref={shortcodeRef}
+						onChange={onShortcodeChange}
+						value={shortcode}
+					/>
+				</div>
+				
+				<MutateButton text="Upload emoji" result={result}/>
+			</form>
+		</div>
+	);
+};
\ No newline at end of file
diff --git a/web/source/settings/admin/emoji/overview.js b/web/source/settings/admin/emoji/overview.js
new file mode 100644
index 000000000..028276da2
--- /dev/null
+++ b/web/source/settings/admin/emoji/overview.js
@@ -0,0 +1,99 @@
+/*
+	 GoToSocial
+	 Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+	 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/>.
+*/
+
+"use strict";
+
+const React = require("react");
+const {Link} = require("wouter");
+const defaultValue = require('default-value');
+
+const NewEmojiForm = require("./new-emoji");
+
+const query = require("../../lib/query");
+
+const base = "/settings/admin/custom-emoji";
+
+module.exports = function EmojiOverview() {
+	const {
+		data: emoji,
+		isLoading,
+		error
+	} = query.useGetAllEmojiQuery({filter: "domain:local"});
+
+	return (
+		<>
+			<h1>Custom Emoji</h1>
+			{error && 
+				<div className="error accent">{error}</div>
+			}
+			{isLoading
+				? "Loading..."
+				: <>
+					<EmojiList emoji={emoji}/>
+					<NewEmojiForm emoji={emoji}/>
+				</>
+			}
+		</>
+	);
+};
+
+function EmojiList({emoji}) {
+	const byCategory = React.useMemo(() => {
+		const categories = {};
+
+		emoji.forEach((emoji) => {
+			let cat = defaultValue(emoji.category, "Unsorted");
+			categories[cat] = defaultValue(categories[cat], []);
+			categories[cat].push(emoji);
+		});
+
+		return categories;
+	}, [emoji]);
+	
+	return (
+		<div>
+			<h2>Overview</h2>
+			<div className="list emoji-list">
+				{emoji.length == 0 && "No local emoji yet"}
+				{Object.entries(byCategory).map(([category, entries]) => {
+					return <EmojiCategory key={category} category={category} entries={entries}/>;
+				})}
+			</div>
+		</div>
+	);
+}
+
+function EmojiCategory({category, entries}) {
+	return (
+		<div className="entry">
+			<b>{category}</b>
+			<div className="emoji-group">
+				{entries.map((e) => {
+					return (
+						<Link key={e.id} to={`${base}/${e.id}`}>
+							{/* <Link key={e.static_url} to={`${base}`}> */}
+							<a>
+								<img src={e.url} alt={e.shortcode} title={`:${e.shortcode}:`}/>
+							</a>
+						</Link>
+					);
+				})}
+			</div>
+		</div>
+	);
+}
\ No newline at end of file