add nicknaming

build.maple

···
 	category = 'run'
 	run = '${v} -d veb_livereload watch run ${v_main} config.maple'
 }
+
+task:run.real = {
+	description = 'Run beep using config.real.maple'
+	category = 'run'
+	run = '${v} -d veb_livereload watch run ${v_main} config.real.maple'
+}

config.maple

···
 	username_pattern = '[a-z0-9_.]+'
 	nickname_min_len = 1
 	nickname_max_len = 20
-	nickname_pattern = '.+'
+	nickname_pattern = '\S.*'
 	password_min_len = 12
 	password_max_len = 72
 	password_pattern = '.+'

src/api.v

···
 	return ctx.redirect('/login')
 }
 
+@['/api/user/set_nickname'; post]
+fn (mut app App) api_user_set_nickname(mut ctx Context) veb.Result {
+	mut nickname := ?string(ctx.form['nickname'] or { '' })
+	if (nickname or { '' }) == '' {
+		nickname = none
+	}
+	user := app.whoami(mut ctx) or {
+		ctx.error('you are not logged in!')
+		return ctx.redirect('/login')
+	}
+	sql app.db {
+		update User set nickname = nickname where id == user.id
+	} or {
+		ctx.error('failed to change nickname')
+		eprintln('failed to update nickname for ${user} (${user.nickname} -> ${nickname})')
+		return ctx.redirect('/me')
+	}
+	return ctx.redirect('/me')
+}
+
 ////// Posts //////
 
 @['/api/post/new_post'; post]

src/app.v

···
 import db.pg
 import entity { User, Post }
 
-pub struct Context {
-	veb.Context
-pub mut:
-	title string
-}
-
 pub struct App {
 pub:
 	config Config
···
 	return none
 }
 
-pub fn (ctx &Context) is_logged_in() bool {
-	return ctx.get_cookie('token') or { '' } != ''
+pub fn (app &App) get_unknown_user() User {
+	return User{ username: 'unknown' }
 }
 
-pub fn (app &App) get_unknown_user() User {
-	return User{ username: 'unknown' }
+pub struct Context {
+	veb.Context
+pub mut:
+	title string
+}
+
+pub fn (ctx &Context) is_logged_in() bool {
+	return ctx.get_cookie('token') or { '' } != ''
 }

src/templates/login.html

···
 	@else
 	<form action="/api/user/login" method="post">
 		<label for="username">username:</label>
-		<input type="text" name="username" id="username">
+		<input
+			type="text"
+			name="username"
+			id="username"
+			pattern="@app.config.user.username_pattern"
+			minlength="@app.config.user.username_min_len"
+			maxlength="@app.config.user.username_max_len"
+			required
+		>
 		<br>
 		<label for="password">password:</label>
-		<input type="password" name="password" id="password">
+		<input
+			type="password"
+			name="password"
+			id="password"
+			pattern="@app.config.user.password_pattern"
+			minlength="@app.config.user.password_min_len"
+			maxlength="@app.config.user.password_max_len"
+			required
+		>
 		<br>
 		<input type="submit" value="log in">
 	</form>

src/templates/me.html

···
 			id="title"
 			minlength="1"
 			maxlength="@app.config.post.title_max_len"
+			placeholder="title"
 		>
 		<br>
 		<textarea
···
 			id="body"
 			minlength="1"
 			maxlength="@app.config.post.body_max_len"
+			rows="10"
+			cols="30"
+			placeholder="body"
 		></textarea>
 		<br>
 		<input type="submit" value="post!">
···
 	<p>display name: @user.get_name()</p>
 	<p><a href="/api/user/logout">log out</a></p>
 	<p><a href="/api/user/full_logout">log out of all devices</a></p>
+</div>
+<div>
+	<h2>settings:</h2>
+	<form action="/api/user/set_nickname" method="post">
+		<label for="nickname">nickname:</label>
+		<input
+			type="text"
+			name="nickname"
+			id="nickname"
+			pattern="@app.config.user.nickname_pattern"
+			minlength="@app.config.user.nickname_min_len"
+			maxlength="@app.config.user.nickname_max_len"
+			value="@{user.nickname or { '' }}"
+			required
+		>
+		<input type="submit" value="update">
+	</form>
+	<form action="/api/user/set_nickname" method="post">
+		<input type="submit" value="reset nickname">
+	</form>
 </div>
 
 @else

src/templates/register.html

···
 	@else
 	<form action="/api/user/register" method="post">
 		<label for="username">username:</label>
-		<input type="text" name="username" id="username">
+		<input
+			type="text"
+			name="username"
+			id="username"
+			pattern="@app.config.user.username_pattern"
+			minlength="@app.config.user.username_min_len"
+			maxlength="@app.config.user.username_max_len"
+			required
+		>
 		<br>
 		<label for="password">password:</label>
-		<input type="password" name="password" id="password">
+		<input
+			type="password"
+			name="password"
+			id="password"
+			pattern="@app.config.user.password_pattern"
+			minlength="@app.config.user.password_min_len"
+			maxlength="@app.config.user.password_max_len"
+			required
+		>
 		<br>
 		<input type="submit" value="register">
 	</form>