[frogend] Emoji copy "Steal this look" (#1222)

* split emoji into local and remote, allow looking up remote emoji by toot url

* optimize some/all filtering

* fix local emoji routes

* implement copy action

* shortcode validation, don't wipe form on error

* copy & disable PATCH

* remove local toot acceptance for testing

* unused import

* parse emoji from account and status, get web_url from status uri

* fix url parse

* submit button loading info

* actually send category

* code cleanup, distinguish between account and status responses

* use loading icons

* fix loading icon on federation page

* require Loading element

* remove unused require

* query explanation, small accessibility tweaks

7 files changed, 426 insertions, 23 deletions

diff --git a/web/source/settings/admin/emoji/detail.js b/web/source/settings/admin/emoji/local/detail.js
index 51e291448..179ee7c7c 100644
--- a/web/source/settings/admin/emoji/detail.js
+++ b/web/source/settings/admin/emoji/local/detail.js
@@ -22,13 +22,14 @@ const React = require("react");
 
 const { useRoute, Link, Redirect } = require("wouter");
 
-const { CategorySelect } = require("./category-select");
-const { useComboBoxInput, useFileInput } = require("../../components/form");
+const { CategorySelect } = require("../category-select");
+const { useComboBoxInput, useFileInput } = require("../../../components/form");
 
-const query = require("../../lib/query");
-const FakeToot = require("../../components/fake-toot");
+const query = require("../../../lib/query");
+const FakeToot = require("../../../components/fake-toot");
+const Loading = require("../../../components/loading");
 
-const base = "/settings/admin/custom-emoji";
+const base = "/settings/custom-emoji/local";
 
 module.exports = function EmojiDetailRoute() {
 	let [_match, params] = useRoute(`${base}/:emojiId`);
@@ -54,7 +55,11 @@ function EmojiDetailData({emojiId}) {
 			</div>
 		);
 	} else if (isLoading) {
-		return "Loading...";
+		return (
+			<div>
+				<Loading/>
+			</div>
+		);
 	} else {
 		return <EmojiDetail emoji={emoji}/>;
 	}
diff --git a/web/source/settings/admin/emoji/index.js b/web/source/settings/admin/emoji/local/index.js
index 0fcda8264..1ccdece72 100644
--- a/web/source/settings/admin/emoji/index.js
+++ b/web/source/settings/admin/emoji/local/index.js
@@ -24,7 +24,7 @@ const {Switch, Route} = require("wouter");
 const EmojiOverview = require("./overview");
 const EmojiDetail = require("./detail");
 
-const base = "/settings/admin/custom-emoji";
+const base = "/settings/custom-emoji/local";
 
 module.exports = function CustomEmoji() {
 	return (
diff --git a/web/source/settings/admin/emoji/new-emoji.js b/web/source/settings/admin/emoji/local/new-emoji.js
index 8cd604c02..985be2d32 100644
--- a/web/source/settings/admin/emoji/new-emoji.js
+++ b/web/source/settings/admin/emoji/local/new-emoji.js
@@ -21,17 +21,19 @@
 const Promise = require('bluebird');
 const React = require("react");
 
-const FakeToot = require("../../components/fake-toot");
-const MutateButton = require("../../components/mutation-button");
+const FakeToot = require("../../../components/fake-toot");
+const MutateButton = require("../../../components/mutation-button");
 
 const {
 	useTextInput,
 	useFileInput,
 	useComboBoxInput
-} = require("../../components/form");
+} = require("../../../components/form");
 
-const query = require("../../lib/query");
-const { CategorySelect } = require('./category-select');
+const query = require("../../../lib/query");
+const { CategorySelect } = require('../category-select');
+
+const shortcodeRegex = /^[a-z0-9_]+$/;
 
 module.exports = function NewEmojiForm({ emoji }) {
 	const emojiCodes = React.useMemo(() => {
@@ -47,9 +49,26 @@ module.exports = function NewEmojiForm({ emoji }) {
 
 	const [onShortcodeChange, resetShortcode, { shortcode, setShortcode, shortcodeRef }] = useTextInput("shortcode", {
 		validator: function validateShortcode(code) {
-			return emojiCodes.has(code)
-				? "Shortcode already in use"
-				: "";
+			// technically invalid, but hacky fix to prevent validation error on page load
+			if (shortcode == "") {return "";}
+
+			if (emojiCodes.has(code)) {
+				return "Shortcode already in use";
+			}
+
+			if (code.length < 2 || code.length > 30) {
+				return "Shortcode must be between 2 and 30 characters";
+			}
+
+			if (code.toLowerCase() != code) {
+				return "Shortcode must be lowercase";
+			}
+
+			if (!shortcodeRegex.test(code)) {
+				return "Shortcode must only contain lowercase letters, numbers, and underscores";
+			}
+
+			return "";
 		}
 	});
 
@@ -78,11 +97,13 @@ module.exports = function NewEmojiForm({ emoji }) {
 				image,
 				shortcode,
 				category
-			});
+			}).unwrap();
 		}).then(() => {
 			resetFile();
 			resetShortcode();
 			resetCategory();
+		}).catch((e) => {
+			console.error("Emoji upload error:", e);
 		});
 	}
 
diff --git a/web/source/settings/admin/emoji/overview.js b/web/source/settings/admin/emoji/local/overview.js
index b8ac87a0f..7a5cfaad6 100644
--- a/web/source/settings/admin/emoji/overview.js
+++ b/web/source/settings/admin/emoji/local/overview.js
@@ -23,10 +23,11 @@ const {Link} = require("wouter");
 
 const NewEmojiForm = require("./new-emoji");
 
-const query = require("../../lib/query");
-const { useEmojiByCategory } = require("./category-select");
+const query = require("../../../lib/query");
+const { useEmojiByCategory } = require("../category-select");
+const Loading = require("../../../components/loading");
 
-const base = "/settings/admin/custom-emoji";
+const base = "/settings/custom-emoji/local";
 
 module.exports = function EmojiOverview() {
 	const {
@@ -37,12 +38,12 @@ module.exports = function EmojiOverview() {
 
 	return (
 		<>
-			<h1>Custom Emoji</h1>
+			<h1>Custom Emoji (local)</h1>
 			{error && 
 				<div className="error accent">{error}</div>
 			}
 			{isLoading
-				? "Loading..."
+				? <Loading/>
 				: <>
 					<EmojiList emoji={emoji}/>
 					<NewEmojiForm emoji={emoji}/>
diff --git a/web/source/settings/admin/emoji/remote/index.js b/web/source/settings/admin/emoji/remote/index.js
new file mode 100644
index 000000000..ae59673a5
--- /dev/null
+++ b/web/source/settings/admin/emoji/remote/index.js
@@ -0,0 +1,54 @@
+/*
+	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 ParseFromToot = require("./parse-from-toot");
+
+const query = require("../../../lib/query");
+const Loading = require("../../../components/loading");
+
+module.exports = function RemoteEmoji() {
+	// local emoji are queried for shortcode collision detection
+	const {
+		data: emoji = [],
+		isLoading,
+		error
+	} = query.useGetAllEmojiQuery({filter: "domain:local"});
+
+	const emojiCodes = React.useMemo(() => {
+		return new Set(emoji.map((e) => e.shortcode));
+	}, [emoji]);
+
+	return (
+		<>
+			<h1>Custom Emoji (remote)</h1>
+			{error && 
+				<div className="error accent">{error}</div>
+			}
+			{isLoading
+				? <Loading/>
+				: <>
+					<ParseFromToot emoji={emoji} emojiCodes={emojiCodes} />
+				</>
+			}
+		</>
+	);
+};
\ No newline at end of file
diff --git a/web/source/settings/admin/emoji/remote/parse-from-toot.js b/web/source/settings/admin/emoji/remote/parse-from-toot.js
new file mode 100644
index 000000000..75ff8bf7a
--- /dev/null
+++ b/web/source/settings/admin/emoji/remote/parse-from-toot.js
@@ -0,0 +1,319 @@
+/*
+	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 Redux = require("react-redux");
+const syncpipe = require("syncpipe");
+
+const {
+	useTextInput,
+	useComboBoxInput
+} = require("../../../components/form");
+
+const { CategorySelect } = require('../category-select');
+
+const query = require("../../../lib/query");
+const Loading = require("../../../components/loading");
+
+module.exports = function ParseFromToot({ emojiCodes }) {
+	const [searchStatus, { data, isLoading, isSuccess, error }] = query.useSearchStatusForEmojiMutation();
+	const instanceDomain = Redux.useSelector((state) => (new URL(state.oauth.instance).host));
+
+	const [onURLChange, _resetURL, { url }] = useTextInput("url");
+
+	const searchResult = React.useMemo(() => {
+		if (!isSuccess) {
+			return null;
+		}
+
+		if (data.type == "none") {
+			return "No results found";
+		}
+
+		if (data.domain == instanceDomain) {
+			return <b>This is a local user/toot, all referenced emoji are already on your instance</b>;
+		}
+
+		if (data.list.length == 0) {
+			return <b>This {data.type == "statuses" ? "toot" : "account"} doesn't use any custom emoji</b>;
+		}
+
+		return (
+			<CopyEmojiForm
+				localEmojiCodes={emojiCodes}
+				type={data.type}
+				domain={data.domain}
+				emojiList={data.list}
+			/>
+		);
+	}, [isSuccess, data, instanceDomain, emojiCodes]);
+
+	function submitSearch(e) {
+		e.preventDefault();
+		searchStatus(url);
+	}
+
+	return (
+		<div className="parse-emoji">
+			<h2>Steal this look</h2>
+			<form onSubmit={submitSearch}>
+				<div className="form-field text">
+					<label htmlFor="url">
+						Link to a toot:
+					</label>
+					<div className="row">
+						<input
+							type="text"
+							id="url"
+							name="url"
+							onChange={onURLChange}
+							value={url}
+						/>
+						<button disabled={isLoading}>
+							<i className={[
+								"fa",
+								(isLoading
+									? "fa-refresh fa-spin"
+									: "fa-search")
+							].join(" ")} aria-hidden="true" title="Search"/>
+							<span className="sr-only">Search</span>
+						</button>
+					</div>
+					{isLoading && <Loading/>}
+					{error && <div className="error">{error.data.error}</div>}
+				</div>
+			</form>
+			{searchResult}
+		</div>
+	);
+};
+
+function makeEmojiState(emojiList, checked) {
+	/* Return a new object, with a key for every emoji's shortcode,
+		 And a value for it's checkbox `checked` state.
+	 */
+	return syncpipe(emojiList, [
+		(_) => _.map((emoji) => [emoji.shortcode, {
+			checked,
+			valid: true
+		}]),
+		(_) => Object.fromEntries(_)
+	]);
+}
+
+function updateEmojiState(emojiState, checked) {
+	/* Create a new object with all emoji entries' checked state updated */
+	return syncpipe(emojiState, [
+		(_) => Object.entries(emojiState),
+		(_) => _.map(([key, val]) => [key, {
+			...val,
+			checked
+		}]),
+		(_) => Object.fromEntries(_)
+	]);
+}
+
+function CopyEmojiForm({ localEmojiCodes, type, domain, emojiList }) {
+	const [patchRemoteEmojis, patchResult] = query.usePatchRemoteEmojisMutation();
+	const [err, setError] = React.useState();
+
+	const toggleAllRef = React.useRef(null);
+	const [toggleAllState, setToggleAllState] = React.useState(0);
+	const [emojiState, setEmojiState] = React.useState(makeEmojiState(emojiList, false));
+	const [someSelected, setSomeSelected] = React.useState(false);
+
+	const [categoryState, resetCategory, { category }] = useComboBoxInput("category");
+
+	React.useEffect(() => {
+		if (emojiList != undefined) {
+			setEmojiState(makeEmojiState(emojiList, false));
+		}
+	}, [emojiList]);
+
+	React.useEffect(() => {
+		/* Updates (un)check all checkbox, based on shortcode checkboxes
+			 Can be 0 (not checked), 1 (checked) or 2 (indeterminate)
+		 */
+		if (toggleAllRef.current == null) {
+			return;
+		}
+
+		let values = Object.values(emojiState);
+		/* one or more boxes are checked */
+		let some = values.some((v) => v.checked);
+
+		let all = false;
+		if (some) {
+			/* there's not at least one unchecked box */
+			all = !values.some((v) => v.checked == false);
+		}
+
+		setSomeSelected(some);
+
+		if (some && !all) {
+			setToggleAllState(2);
+			toggleAllRef.current.indeterminate = true;
+		} else {
+			setToggleAllState(all ? 1 : 0);
+			toggleAllRef.current.indeterminate = false;
+		}
+	}, [emojiState, toggleAllRef]);
+
+	function updateEmoji(shortcode, value) {
+		setEmojiState({
+			...emojiState,
+			[shortcode]: {
+				...emojiState[shortcode],
+				...value
+			}
+		});
+	}
+
+	function toggleAll(e) {
+		let selectAll = e.target.checked;
+
+		if (toggleAllState == 2) { // indeterminate
+			selectAll = false;
+		}
+
+		setEmojiState(updateEmojiState(emojiState, selectAll));
+		setToggleAllState(selectAll);
+	}
+
+	function submit(action) {
+		Promise.try(() => {
+			setError(null);
+			const selectedShortcodes = syncpipe(emojiState, [
+				(_) => Object.entries(_),
+				(_) => _.filter(([_shortcode, entry]) => entry.checked),
+				(_) => _.map(([shortcode, entry]) => {
+					if (action == "copy" && !entry.valid) {
+						throw `One or more selected emoji have non-unique shortcodes (${shortcode}), unselect them or pick a different local shortcode`;
+					}
+					return {
+						shortcode,
+						localShortcode: entry.shortcode
+					};
+				})
+			]);
+
+			return patchRemoteEmojis({
+				action,
+				domain,
+				list: selectedShortcodes,
+				category
+			}).unwrap();
+		}).then(() => {
+			setEmojiState(makeEmojiState(emojiList, false));
+			resetCategory();
+		}).catch((e) => {
+			if (Array.isArray(e)) {
+				setError(e.map(([shortcode, msg]) => (
+					<div key={shortcode}>
+						{shortcode}: <span style={{ fontWeight: "initial" }}>{msg}</span>
+					</div>
+				)));
+			} else {
+				setError(e);
+			}
+		});
+	}
+
+	return (
+		<div className="parsed">
+			<span>This {type == "statuses" ? "toot" : "account"} uses the following custom emoji, select the ones you want to copy/disable:</span>
+			<div className="emoji-list">
+				<label className="header">
+					<input
+						ref={toggleAllRef}
+						type="checkbox"
+						onChange={toggleAll}
+						checked={toggleAllState === 1}
+					/> All
+				</label>
+				{emojiList.map((emoji) => (
+					<EmojiEntry
+						key={emoji.shortcode}
+						emoji={emoji}
+						localEmojiCodes={localEmojiCodes}
+						updateEmoji={(value) => updateEmoji(emoji.shortcode, value)}
+						checked={emojiState[emoji.shortcode].checked}
+					/>
+				))}
+			</div>
+
+			<CategorySelect
+				value={category}
+				categoryState={categoryState}
+			/>
+
+			<div className="action-buttons row">
+				<button disabled={!someSelected} onClick={() => submit("copy")}>{patchResult.isLoading ? "Processing..." : "Copy to local emoji"}</button>
+				<button disabled={!someSelected} onClick={() => submit("disable")} className="danger">{patchResult.isLoading ? "Processing..." : "Disable"}</button>
+			</div>
+			{err && <div className="error">
+				{err}
+			</div>}
+			{patchResult.isSuccess && <div>
+				Action applied to {patchResult.data.length} emoji
+			</div>}
+		</div>
+	);
+}
+
+function EmojiEntry({ emoji, localEmojiCodes, updateEmoji, checked }) {
+	const [onShortcodeChange, _resetShortcode, { shortcode, shortcodeRef, shortcodeValid }] = useTextInput("shortcode", {
+		defaultValue: emoji.shortcode,
+		validator: function validateShortcode(code) {
+			return (checked && localEmojiCodes.has(code))
+				? "Shortcode already in use"
+				: "";
+		}
+	});
+
+	React.useEffect(() => {
+		updateEmoji({ valid: shortcodeValid });
+		/* eslint-disable-next-line react-hooks/exhaustive-deps */
+	}, [shortcodeValid]);
+
+	return (
+		<label key={emoji.shortcode} className="row">
+			<input
+				type="checkbox"
+				onChange={(e) => updateEmoji({ checked: e.target.checked })}
+				checked={checked}
+			/>
+			<img className="emoji" src={emoji.url} title={emoji.shortcode} />
+
+			<input
+				type="text"
+				id="shortcode"
+				name="Shortcode"
+				ref={shortcodeRef}
+				onChange={(e) => {
+					onShortcodeChange(e);
+					updateEmoji({ shortcode: e.target.value, checked: true });
+				}}
+				value={shortcode}
+			/>
+		</label>
+	);
+}
\ No newline at end of file
diff --git a/web/source/settings/admin/federation.js b/web/source/settings/admin/federation.js
index 753024e58..f1023d365 100644
--- a/web/source/settings/admin/federation.js
+++ b/web/source/settings/admin/federation.js
@@ -30,6 +30,7 @@ const api = require("../lib/api");
 const adminActions = require("../redux/reducers/admin").actions;
 const submit = require("../lib/submit");
 const BackButton = require("../components/back-button");
+const Loading = require("../components/loading");
 
 const base = "/settings/admin/federation";
 
@@ -56,7 +57,9 @@ module.exports = function AdminSettings() {
 		return (
 			<div>
 				<h1>Federation</h1>
-				Loading...
+				<div>
+					<Loading/>
+				</div>
 			</div>
 		);
 	}
@@ -321,7 +324,7 @@ function InstancePage({domain, Form}) {
 	const [statusMsg, setStatus] = React.useState("");
 
 	if (entry == undefined) {
-		return "Loading...";
+		return <Loading/>;
 	}
 
 	const updateBlock = submit(