implement artwork upload

.gitignore

@@ -1 +1,2 @@
 /target
+/files

Cargo.lock

@@ -411,6 +411,15 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "encoding_rs"
+version = "0.8.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "75030f3c4f45dafd7586dd6780965a8c7e8e285a5ecb86713e63a79c5b2766f3"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "equivalent"
 version = "1.0.1"
@@ -1089,6 +1098,16 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
+[[package]]
+name = "mime_guess"
+version = "2.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7c44f8e672c00fe5308fa235f821cb4198414e1c77935c1ab6948d3fd78550e"
+dependencies = [
+ "mime",
+ "unicase",
+]
+
 [[package]]
 name = "minimal-lexical"
 version = "0.2.1"
@@ -1116,6 +1135,24 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "multer"
+version = "3.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83e87776546dc87511aa5ee218730c92b666d7264ab6ed41f9d215af9cd5224b"
+dependencies = [
+ "bytes",
+ "encoding_rs",
+ "futures-util",
+ "http",
+ "httparse",
+ "memchr",
+ "mime",
+ "spin",
+ "tokio",
+ "version_check",
+]
+
 [[package]]
 name = "nix"
 version = "0.29.0"
@@ -1336,9 +1373,12 @@ dependencies = [
  "headers",
  "http",
  "http-body-util",
+ "httpdate",
  "hyper",
  "hyper-util",
  "mime",
+ "mime_guess",
+ "multer",
  "nix",
  "parking_lot",
  "percent-encoding",
@@ -1353,6 +1393,7 @@ dependencies = [
  "serde_urlencoded",
  "smallvec",
  "sync_wrapper",
+ "tempfile",
  "thiserror",
  "time",
  "tokio",
@@ -2240,6 +2281,15 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "unicase"
+version = "2.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7d2d4dafb69621809a81864c9c1b864479e1235c0dd4e199924b9742439ed89"
+dependencies = [
+ "version_check",
+]
+
 [[package]]
 name = "unicode-bidi"
 version = "0.3.17"

Cargo.toml

@@ -11,7 +11,7 @@ ructe = { version = "0.17.2", features = ["sass", "mime03"] }
 
 [dependencies]
 mime = "0.3.17"
-poem = { version = "3.1.3", features = ["session"] }
+poem = { version = "3.1.3", features = ["session", "tempfile", "multipart", "static-files"] }
 serde = "1.0.215"
 sqlx = { version = "0.8.2", features = ["uuid", "postgres", "runtime-tokio", "time"] }
 time = "0.3.36"

critch.toml

@@ -1,4 +1,4 @@
 admin_password = "clowning"
 # site_password = "password"
-files_dir = "./files"
+files_dir = "/home/cel/src/critch/files"
 database_connection = "postgres://critch:critch@localhost/critch"

migrations/20241113160730_critch.sql

@@ -1,7 +1,7 @@
 create extension if not exists "uuid-ossp";
 
 create table artists (
-    id integer primary key generated always as identity,
+    artist_id integer primary key generated always as identity,
     handle varchar(128) not null unique,
     name varchar(128),
     bio text,
@@ -9,39 +9,39 @@ create table artists (
 );
 
 create table artworks (
-    id integer primary key generated always as identity,
+    artwork_id integer primary key generated always as identity,
     title varchar(256),
     description text,
     url_source varchar(256),
     created_at timestamp not null default current_timestamp,
     artist_id integer not null,
     comment_number integer not null default 0,
-    foreign key (artist_id) references artists(id)
+    foreign key (artist_id) references artists(artist_id)
 );
 
 create table comments (
-    id integer unique not null,
+    comment_id integer unique not null,
     text text not null,
     artwork_id integer not null,
     created_at timestamp not null default current_timestamp,
-    primary key (id, artwork_id),
+    primary key (comment_id, artwork_id),
-    foreign key (artwork_id) references artworks(id)
+    foreign key (artwork_id) references artworks(artwork_id)
 );
 
 create table comment_relations (
     artwork_id integer,
-    foreign key (artwork_id) references artworks(id),
+    foreign key (artwork_id) references artworks(artwork_id),
     in_reply_to_id integer,
-    foreign key (in_reply_to_id) references comments(id),
+    foreign key (in_reply_to_id) references comments(comment_id),
     comment_id integer,
-    foreign key (comment_id) references comments(id),
+    foreign key (comment_id) references comments(comment_id),
     primary key (artwork_id, in_reply_to_id, comment_id)
 );
 
 create table artwork_files (
-    id uuid primary key default gen_random_uuid(),
+    file_id uuid primary key default gen_random_uuid(),
     alt_text text,
     extension varchar(16),
     artwork_id integer,
-    foreign key (artwork_id) references artworks(id)
+    foreign key (artwork_id) references artworks(artwork_id)
 );

src/artist.rs

@@ -1,9 +1,9 @@
 use crate::error::Error;
 use crate::Result;
 
-#[derive(sqlx::FromRow)]
+#[derive(sqlx::FromRow, sqlx::Type)]
 pub struct Artist {
-    id: Option<i32>,
+    artist_id: Option<i32>,
     pub handle: String,
     pub name: Option<String>,
     pub bio: Option<String>,
@@ -11,7 +11,17 @@ pub struct Artist {
 }
 
 impl Artist {
-    pub fn id(&self) -> Option<i32> {
+    pub fn new(handle: String) -> Self {
-        self.id
+        Self {
+            artist_id: None,
+            handle,
+            name: None,
+            bio: None,
+            site: None,
+        }
+    }
+
+    pub fn artist_id(&self) -> Option<i32> {
+        self.artist_id
     }
 }

src/artwork.rs

@@ -1,27 +1 @@
-use time::{OffsetDateTime, PrimitiveDateTime};
-use uuid::Uuid;
 
-use crate::{artist::Artist, comment::Comment, file::File};
-
-#[derive(sqlx::FromRow)]
-pub struct Artwork {
-    /// artwork id
-    id: Option<i32>,
-    /// name of the artwork
-    pub title: Option<String>,
-    /// description of the artwork
-    pub description: Option<String>,
-    /// source url of the artwork
-    pub url_source: Option<String>,
-    /// artwork creation time
-    created_at: Option<PrimitiveDateTime>,
-    /// id of the artist
-    #[sqlx(Flatten)]
-    pub artist: Artist,
-    /// ids of files
-    #[sqlx(Flatten)]
-    pub files: Vec<File>,
-    // /// TODO: comments in thread,
-    // #[sqlx(Flatten)]
-    // comments: Vec<Comment>,
-}

src/comment.rs

@@ -6,7 +6,7 @@ use crate::Result;
 #[derive(sqlx::FromRow)]
 pub struct Comment {
     /// id of the comment in the thread
-    id: Option<i32>,
+    comment_id: Option<i32>,
     /// text of the comment
     pub text: String,
     /// id of artwork thread comment is in
@@ -21,7 +21,7 @@ pub struct Comment {
 
 impl Comment {
     pub fn id(&self) -> Option<i32> {
-        self.id
+        self.comment_id
     }
 
     pub fn created_at(&self) -> Option<OffsetDateTime> {

src/db/artists.rs

@@ -13,7 +13,7 @@ impl Artists {
 
     pub async fn create(&self, artist: Artist) -> Result<i32> {
         let artist_id = sqlx::query!(
-            "insert into artists (handle, name, bio, site) values ($1, $2, $3, $4) returning id",
+            "insert into artists (handle, name, bio, site) values ($1, $2, $3, $4) returning artist_id",
             artist.handle,
             artist.name,
             artist.bio,
@@ -21,7 +21,7 @@ impl Artists {
         )
         .fetch_one(&self.0)
         .await?
-        .id;
+        .artist_id;
         Ok(artist_id)
     }
 

src/db/artworks.rs

@@ -1,13 +1,49 @@
 use sqlx::{Pool, Postgres};
 use uuid::Uuid;
 
-use crate::artist::Artist;
-use crate::artwork::Artwork;
-use crate::file::File;
 use crate::Result;
 
 use super::Database;
 
+use time::{OffsetDateTime, PrimitiveDateTime};
+
+use crate::{artist::Artist, comment::Comment, file::File};
+
+#[derive(sqlx::FromRow)]
+pub struct Artwork {
+    /// artwork id
+    artwork_id: Option<i32>,
+    /// name of the artwork
+    pub title: Option<String>,
+    /// description of the artwork
+    pub description: Option<String>,
+    /// source url of the artwork
+    pub url_source: Option<String>,
+    /// artwork creation time
+    created_at: Option<PrimitiveDateTime>,
+    /// id of the artist
+    pub artist: Artist,
+    /// ids of files
+    pub files: Vec<File>,
+    // /// TODO: comments in thread,
+    // #[sqlx(Flatten)]
+    // comments: Vec<Comment>,
+}
+
+impl Artwork {
+    pub fn new(title: Option<String>, description: Option<String>, url_source: Option<String>, artist: Artist, files: Vec<File>) -> Self {
+        Self {
+            artwork_id: None,
+            title,
+            description,
+            url_source,
+            created_at: None,
+            artist,
+            files,
+        }
+    }
+}
+
 #[derive(Clone)]
 pub struct Artworks(Pool<Postgres>);
 
@@ -21,16 +57,17 @@ impl Artworks {
     }
 
     pub async fn create(&self, artwork: Artwork) -> Result<i32> {
-        let artist_id = if let Some(artist_id) = artwork.artist.id() {
+        // TODO: efficiency?
+        let artist_id = if let Some(artist_id) = self.downcast().artists().read_handle(&artwork.artist.handle).await.map(|artist| artist.artist_id()).unwrap_or(artwork.artist.artist_id()) {
             artist_id
         } else {
             self.downcast().artists().create(artwork.artist).await?
         };
-        let artwork_id = sqlx::query!("insert into artworks (title, description, url_source, artist_id) values ($1, $2, $3, $4) returning id", artwork.title, artwork.description, artwork.url_source, artist_id).fetch_one(&self.0).await?.id;
+        let artwork_id = sqlx::query!("insert into artworks (title, description, url_source, artist_id) values ($1, $2, $3, $4) returning artwork_id", artwork.title, artwork.description, artwork.url_source, artist_id).fetch_one(&self.0).await?.artwork_id;
         for file in artwork.files {
             sqlx::query!(
-                "insert into artwork_files (id, alt_text, extension, artwork_id) values ($1, $2, $3, $4)",
+                "insert into artwork_files (file_id, alt_text, extension, artwork_id) values ($1, $2, $3, $4)",
-                file.id(),
+                file.file_id(),
                 file.alt_text,
                 file.extension(),
                 artwork_id
@@ -43,8 +80,12 @@ impl Artworks {
 
     pub async fn read_all(&self) -> Result<Vec<Artwork>> {
         // TODO: join comments and files
-        Ok(sqlx::query_as(
+        Ok(sqlx::query_as!(Artwork, 
-            "select * from artworks left join artists on artworks.artist_id = artists.id left join artwork_files on artworks.id = artwork_files.artwork_id group by artworks.id, artists.id, artwork_files.id",
+            r#"select artworks.artwork_id, artworks.title, artworks.description, artworks.url_source, artworks.created_at, coalesce(artists.*) as "artist!: Artist", coalesce(array_agg((artwork_files.file_id, artwork_files.alt_text, artwork_files.extension, artwork_files.artwork_id)) filter (where artwork_files.file_id is not null), '{}') as "files!: Vec<File>" 
+            from artworks
+            left join artists on artworks.artist_id = artists.artist_id 
+            left join artwork_files on artworks.artwork_id = artwork_files.artwork_id 
+            group by artworks.artwork_id, artists.artist_id"#,
         )
         .fetch_all(&self.0)
         .await?)

src/db/comments.rs

@@ -13,13 +13,13 @@ impl Comments {
 
     pub async fn create(&self, comment: Comment) -> Result<i32> {
         let comment_id = sqlx::query!(
-            r#"insert into comments (text, artwork_id) values ($1, $2) returning id"#,
+            r#"insert into comments (text, artwork_id) values ($1, $2) returning comment_id"#,
             comment.text,
             comment.artwork_id
         )
         .fetch_one(&self.0)
         .await?
-        .id;
+        .comment_id;
         for in_reply_to_id in comment.in_reply_to_ids {
             sqlx::query!("insert into comment_relations (artwork_id, in_reply_to_id, comment_id) values ($1, $2, $3)", comment.artwork_id, in_reply_to_id, comment_id).execute(&self.0).await?;
         }
@@ -35,8 +35,11 @@ impl Comments {
     }
 
     pub async fn read_thread(&self, artwork_id: i32) -> Result<Vec<Comment>> {
-        Ok(sqlx::query_as("select * from comments")
+        Ok(
+            sqlx::query_as("select * from comments where artwork_id = $1")
+                .bind(artwork_id)
                 .fetch_all(&self.0)
-            .await?)
+                .await?,
+        )
     }
 }

src/db/mod.rs

@@ -3,9 +3,9 @@ use artworks::Artworks;
 use comments::Comments;
 use sqlx::{postgres::PgPoolOptions, Pool, Postgres};
 
-mod artists;
+pub mod artists;
-mod artworks;
+pub mod artworks;
-mod comments;
+pub mod comments;
 
 #[derive(Clone)]
 pub struct Database(Pool<Postgres>);

src/error.rs

@@ -1,6 +1,9 @@
 use std::fmt::Display;
 
-use poem::{error::ResponseError, http::StatusCode};
+use poem::{
+    error::{ParseMultipartError, ResponseError},
+    http::StatusCode,
+};
 use sqlx::postgres::PgDatabaseError;
 
 #[derive(Debug)]
@@ -11,6 +14,11 @@ pub enum Error {
     DatabaseError(sqlx::Error),
     NotFound,
     MissingField,
+    Unauthorized,
+    MultipartError,
+    BadRequest,
+    UnsupportedFileType(String),
+    UploadDirectory(String),
 }
 
 impl Display for Error {
@@ -22,6 +30,15 @@ impl Display for Error {
             Error::DatabaseError(error) => write!(f, "database error: {}", error),
             Error::NotFound => write!(f, "not found"),
             Error::MissingField => write!(f, "missing field in row"),
+            Error::Unauthorized => write!(f, "user unauthorized"),
+            Error::MultipartError => write!(f, "error parsing multipart form data"),
+            Error::BadRequest => write!(f, "bad request"),
+            Error::UnsupportedFileType(filetype) => {
+                write!(f, "unsupported file upload type: {}", filetype)
+            }
+            Error::UploadDirectory(directory) => {
+                write!(f, "invalid uploads directory: {}", directory)
+            }
         }
     }
 }
@@ -37,6 +54,11 @@ impl ResponseError for Error {
             Error::NotFound => StatusCode::NOT_FOUND,
             Error::SQLError(_) => StatusCode::INTERNAL_SERVER_ERROR,
             Error::MissingField => StatusCode::INTERNAL_SERVER_ERROR,
+            Error::Unauthorized => StatusCode::UNAUTHORIZED,
+            Error::MultipartError => StatusCode::BAD_REQUEST,
+            Error::BadRequest => StatusCode::BAD_REQUEST,
+            Error::UnsupportedFileType(_) => StatusCode::BAD_REQUEST,
+            Error::UploadDirectory(_) => StatusCode::INTERNAL_SERVER_ERROR,
         }
     }
 }
@@ -67,3 +89,9 @@ impl From<sqlx::Error> for Error {
         }
     }
 }
+
+impl From<ParseMultipartError> for Error {
+    fn from(e: ParseMultipartError) -> Self {
+        Error::MultipartError
+    }
+}

src/file.rs

@@ -1,26 +1,34 @@
+use std::str::FromStr;
+
 use uuid::Uuid;
 
-#[derive(sqlx::FromRow)]
+use crate::error::Error;
+use crate::Result;
+
+#[derive(sqlx::FromRow, sqlx::Type)]
 pub struct File {
-    id: Uuid,
+    file_id: Uuid,
     pub alt_text: String,
     extension: String,
     artwork_id: Option<i32>,
 }
 
 impl File {
-    pub fn new(file: std::fs::File, extension: String) -> Self {
+    pub fn new(content_type: &str) -> Result<Self> {
-        let id = Uuid::new_v4();
+        let file_id = Uuid::new_v4();
-        Self {
+        let content_type: FileType = FromStr::from_str(content_type)?;
-            id,
+        let extension = content_type.extension().to_owned();
+        // TODO: check file type really is content-type reported by form.
+        Ok(Self {
+            file_id,
             alt_text: String::new(),
             extension,
             artwork_id: None,
-        }
+        })
     }
 
-    pub fn id(&self) -> Uuid {
+    pub fn file_id(&self) -> Uuid {
-        self.id
+        self.file_id
     }
 
     pub fn extension(&self) -> &str {
@@ -31,3 +39,49 @@ impl File {
         self.artwork_id
     }
 }
+
+pub enum FileType {
+    Audio(String),
+    Video(String),
+    Image(String),
+    // TODO: text types
+    // Text(String),
+}
+
+impl FileType {
+    pub fn extension(&self) -> &str {
+        match self {
+            FileType::Audio(e) => e,
+            FileType::Video(e) => e,
+            FileType::Image(e) => e,
+        }
+    }
+}
+
+impl FromStr for FileType {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Self> {
+        match s {
+            "mp4" | "video/mp4" => Ok(FileType::Video("mp4".to_owned())),
+            "mpeg" | "video/mpeg" => Ok(FileType::Video("mpeg".to_owned())),
+            "webm" | "video/webm" => Ok(FileType::Video("webm".to_owned())),
+            "ogv" | "video/ogg" => Ok(FileType::Video("ogv".to_owned())),
+            "mp3" | "audio/mpeg" => Ok(FileType::Audio("mp3".to_owned())),
+            "weba" | "audio/webm" => Ok(FileType::Audio("weba".to_owned())),
+            "aac" | "audio/aac" => Ok(FileType::Audio("aac".to_owned())),
+            "oga" | "audio/ogg" => Ok(FileType::Audio("oga".to_owned())),
+            "wav" | "audio/wav" => Ok(FileType::Audio("wav".to_owned())),
+            "webp" | "image/webp" => Ok(FileType::Image("webp".to_owned())),
+            "apng" | "image/apng" => Ok(FileType::Image("apng".to_owned())),
+            "avif" | "image/avif" => Ok(FileType::Image("avif".to_owned())),
+            "bmp" | "image/bmp" => Ok(FileType::Image("bmp".to_owned())),
+            "gif" | "image/gif" => Ok(FileType::Image("gif".to_owned())),
+            "jpeg" | "image/jpeg" => Ok(FileType::Image("jpeg".to_owned())),
+            "png" | "image/png" => Ok(FileType::Image("png".to_owned())),
+            "svg" | "image/svg+xml" => Ok(FileType::Image("svg".to_owned())),
+            "tiff" | "image/tiff" => Ok(FileType::Image("tiff".to_owned())),
+            s => Err(Error::UnsupportedFileType(s.to_owned())),
+        }
+    }
+}

src/lib.rs

@@ -1,5 +1,9 @@
+#![feature(async_closure)]
+
 use config::Config;
 use db::Database;
+use error::Error;
+use tokio::{fs::File, io::AsyncWriteExt};
 
 mod artist;
 mod artwork;
@@ -25,6 +29,20 @@ impl Critch {
 
         Self { db, config }
     }
+
+    pub async fn save_file(&self, file_name: &str, file_data: Vec<u8>) -> Result<()> {
+        let upload_dir = self.config.files_dir();
+        if upload_dir.is_dir() {
+            let file_handle = upload_dir.join(file_name);
+            let mut file = File::create(file_handle).await?;
+            file.write_all(&file_data).await?;
+            return Ok(());
+        } else {
+            return Err(Error::UploadDirectory(
+                self.config.files_dir().to_string_lossy().to_string(),
+            ));
+        }
+    }
 }
 
 include!(concat!(env!("OUT_DIR"), "/templates.rs"));

src/main.rs

@@ -1,3 +1,4 @@
+use poem::endpoint::StaticFilesEndpoint;
 use poem::session::{CookieConfig, CookieSession};
 use poem::web::cookie::CookieKey;
 use poem::{delete, post, put, EndpointExt};
@@ -10,6 +11,7 @@ use critch::Critch;
 #[tokio::main]
 async fn main() -> Result<(), std::io::Error> {
     let config = Config::from_file("./critch.toml").unwrap();
+    let uploads_dir = config.files_dir().to_owned();
     let state = Critch::new(config).await;
 
     let cookie_config = CookieConfig::private(CookieKey::generate());
@@ -47,6 +49,7 @@ async fn main() -> Result<(), std::io::Error> {
             "/artworks/:artwork/comments",
             post(routes::artworks::comments::post).delete(routes::artworks::comments::delete),
         )
+        .nest("/uploads", StaticFilesEndpoint::new(uploads_dir))
         .catch_all_error(routes::error::error)
         .data(state)
         .with(cookie_session);

src/routes/admin.rs

@@ -19,7 +19,7 @@ pub async fn get_dashboard(session: &Session, critch: Data<&Critch>) -> Result<R
     if let Some(true) = session.get("is_admin") {
         let comments = critch.db.comments().read_all().await?;
         let artworks = critch.db.artworks().read_all().await?;
-        return Ok(render!(templates::admin_dashboard_html).into_response());
+        return Ok(render!(templates::admin_dashboard_html, artworks).into_response());
     } else {
         return Ok(Redirect::see_other("/admin/login").into_response());
     }

src/routes/artworks.rs

@@ -1,10 +1,49 @@
-use poem::{handler, web::Path};
+use poem::web::{Data, Multipart, Redirect};
+use poem::IntoResponse;
+use poem::{handler, session::Session, web::Path, Response};
+
+use crate::artist::Artist;
+use crate::db::artworks::Artwork;
+use crate::error::Error;
+use crate::file::File;
+use crate::{Critch, Result};
 
 pub mod comments;
 
 #[handler]
-pub async fn post() {
+pub async fn post(
-    todo!()
+    session: &Session,
+    mut multipart: Multipart,
+    critch: Data<&Critch>,
+) -> Result<Response> {
+    if let Some(true) = session.get("is_admin") {
+        let (mut title, mut handle, mut url_source, mut description, mut files) =
+            (None, None, None, None, Vec::new());
+        while let Some(field) = multipart.next_field().await? {
+            match field.name() {
+                Some("title") => title = Some(field.text().await?),
+                Some("artist") => handle = Some(field.text().await?),
+                Some("url") => url_source = Some(field.text().await?),
+                Some("description") => description = Some(field.text().await?),
+                Some("file") => {
+                    let content_type = field.content_type().ok_or(Error::BadRequest)?.to_owned();
+                    let file_data = field.bytes().await?;
+                    let file = File::new(&content_type)?;
+                    let file_name = format!("{}.{}", file.file_id(), file.extension());
+                    critch.save_file(&file_name, file_data).await?;
+                    files.push(file);
+                }
+                _ => return Err(Error::BadRequest),
+            }
+        }
+        let artist = Artist::new(handle.ok_or(Error::BadRequest)?);
+        let artwork = Artwork::new(title, description, url_source, artist, files);
+        critch.db.artworks().create(artwork).await?;
+        println!("saved file");
+        return Ok(Redirect::see_other("/admin").into_response());
+    } else {
+        return Err(Error::Unauthorized);
+    }
 }
 
 #[handler]

templates/admin_dashboard.rs.html

@@ -1,8 +1,33 @@
 @use super::base_html;
+@use crate::db::artworks::Artwork;
 
-@()
+@(artworks: Vec<Artwork>)
 
 @:base_html({
+<form action="/artworks" method="post" enctype="multipart/form-data">
+  <label for="title">title:</label><br>
+  <input type="text" id="title" name="title"><br>
+  <label for="artist">artist handle:</label><br>
+  <input type="text" id="artist" name="artist" required><br>
+  <label for="url">url source:</label><br>
+  <input type="text" id="url" name="url"><br>
+  <label for="description">description:</label><br>
+  <textarea id="description" name="description"></textarea><br>
+  <input type="file" name="file" multiple>
+  <button type="post">post artwork</button>
+</form>
+<ul>
+@for artwork in artworks {
+  <li>
+    @if let Some(title) = artwork.title {
+      <h2>@title</h2>
+    }
+  @for file in artwork.files {
+    <img src="/uploads/@file.file_id().@file.extension()">
+  }
+  </li>
+}
+</ul>
 <form action="/admin/logout" method="post">
   <button type="logout">log out</button>
 </form>