[feature] Allow users to set custom css for their profiles + threads (#808)

* add custom css account property + db func to fetch

* allow account to get/set custom css

* serve custom css for an account

* go fmt

* use monospace for customcss, add link

* add custom css to account cache

* fix broken field

* add custom css docs to user guide

* add `accounts-allow-custom-css` config flag

* add allow custom css to /api/v1/instance response

* only show/set custom css if allowed to do so

* only set/serve custom account css if enabled

* update swagger docs

* chain promise

* make bool a bit clearer

* use cache for GetAccountCustomCSSByUsername

web/source/panels/base.css

@@ -61,3 +61,7 @@ input, select, textarea {
 		rgb(70, 79, 88) 20px
 	) !important;
 }
+
+.mono {
+	font-family: monospace;
+}

web/source/panels/user/basic.js

@@ -23,7 +23,7 @@ const Promise = require("bluebird");
 
 const Submit = require("../../lib/submit");
 
-module.exports = function Basic({oauth, account}) {
+module.exports = function Basic({oauth, account, allowCustomCSS}) {
 	const [errorMsg, setError] = React.useState("");
 	const [statusMsg, setStatus] = React.useState("");
 
@@ -36,6 +36,7 @@ module.exports = function Basic({oauth, account}) {
 	const [displayName, setDisplayName] = React.useState("");
 	const [bio, setBio] = React.useState("");
 	const [locked, setLocked] = React.useState(false);
+	const [customCSS, setCustomCSS] = React.useState("");
 
 	React.useEffect(() => {
 		setHeaderSrc(account.header);
@@ -44,7 +45,8 @@ module.exports = function Basic({oauth, account}) {
 		setDisplayName(account.display_name);
 		setBio(account.source ? account.source.note : "");
 		setLocked(account.locked);
-	}, [account, setHeaderSrc, setAvatarSrc, setDisplayName, setBio, setLocked]);
+		setCustomCSS((allowCustomCSS && account.custom_css) ? account.custom_css : "");
+	}, [account, setHeaderSrc, setAvatarSrc, setDisplayName, setBio, setLocked, setCustomCSS]);
 
 	const headerOnChange = (e) => {
 		setHeaderFile(e.target.files[0]);
@@ -75,7 +77,11 @@ module.exports = function Basic({oauth, account}) {
 			formDataInfo.set("display_name", displayName);
 			formDataInfo.set("note", bio);
 			formDataInfo.set("locked", locked);
-
+			
+			if (allowCustomCSS) {
+				formDataInfo.set("custom_css", customCSS);
+			}
+			
 			return oauth.apiRequest("/api/v1/accounts/update_credentials", "PATCH", formDataInfo, "form");
 		}).then((json) => {
 			setStatus("Saved!");
@@ -86,6 +92,7 @@ module.exports = function Basic({oauth, account}) {
 			setDisplayName(json.display_name);
 			setBio(json.source.note);
 			setLocked(json.locked);
+			setCustomCSS(allowCustomCSS && json.custom_css ? json.custom_css : "");
 		}).catch((e) => {
 			setError(e.message);
 			setStatus("");
@@ -126,6 +133,13 @@ module.exports = function Basic({oauth, account}) {
 					<label htmlFor="bio">Bio</label>
 					<textarea id="bio" value={bio} onChange={(e) => setBio(e.target.value)} placeholder="Just trying out GoToSocial, my pronouns are they/them and I like sloths."/>
 				</div>
+				{ !allowCustomCSS ? null :  
+					<div className="labelinput">
+						<label htmlFor="customcss">Custom CSS</label>
+						<textarea className="mono" id="customcss" value={customCSS} onChange={(e) => setCustomCSS(e.target.value)}/>
+						<a href="https://docs.gotosocial.org/en/latest/user_guide/custom_css" target="_blank" className="moreinfolink" rel="noreferrer">Learn more about custom CSS (opens in a new tab)</a>
+					</div>
+				}
 				<div className="labelcheckbox">
 					<label htmlFor="locked">Manually approve follow requests</label>
 					<input id="locked" type="checkbox" checked={locked} onChange={(e) => setLocked(e.target.checked)}/>

web/source/panels/user/index.js

@@ -33,26 +33,40 @@ require("./style.css");
 
 function UserPanel({oauth}) {
 	const [account, setAccount] = React.useState({});
+	const [allowCustomCSS, setAllowCustomCSS] = React.useState(false);
 	const [errorMsg, setError] = React.useState("");
 	const [statusMsg, setStatus] = React.useState("Fetching user info");
 
+	React.useEffect(() => {
+
+	}, [oauth, setAllowCustomCSS, setError, setStatus]);
+
 	React.useEffect(() => {
 		Promise.try(() => {
-			return oauth.apiRequest("/api/v1/accounts/verify_credentials", "GET");
+			return oauth.apiRequest("/api/v1/instance", "GET");
 		}).then((json) => {
-			setAccount(json);
+			setAllowCustomCSS(json.configuration.accounts.allow_custom_css);
+			Promise.try(() => {
+				return oauth.apiRequest("/api/v1/accounts/verify_credentials", "GET");
+			}).then((json) => {
+				setAccount(json);
+			}).catch((e) => {
+				setError(e.message);
+				setStatus("");
+			});
 		}).catch((e) => {
 			setError(e.message);
 			setStatus("");
 		});
-	}, [oauth, setAccount, setError, setStatus]);
+
+	}, [oauth, setAllowCustomCSS, setAccount, setError, setStatus]);
 
 	return (
 		<React.Fragment>
 			<div>
 				<button className="logout" onClick={oauth.logout}>Log out of settings panel</button>
 			</div>
-			<Basic oauth={oauth} account={account}/>
+			<Basic oauth={oauth} account={account} allowCustomCSS={allowCustomCSS}/>
 			<Posts oauth={oauth} account={account}/>
 			<Security oauth={oauth}/>
 		</React.Fragment>