Add some varied default song covers

.gitignore

@@ -1,2 +1,3 @@
-/target
-/dist
+target
+dist
+.env

Cargo.toml

@@ -1,20 +1,3 @@
-[package]
-name = "singit2"
-version = "0.2.2"
-authors = ["Joakim Hulthe <joakim@hulthe.net"]
-edition = "2021"
-
-[lib]
-crate-type = ["cdylib"]
-
-[dependencies]
-seed = "0.8.0"
-#wasm-bindgen = "0.2.70"
-serde = { version = "1", features = ['derive'] }
-serde_json = "1"
-anyhow = "*"
-rand = "0.8.4"
-
-[dependencies.css_typegen]
-git = "https://github.com/hulthe/css_typegen.git"
-branch = "master"
+[workspace]
+members = ["backend", "frontend"]
+resolver = "2"

Dockerfile

@@ -1,11 +1,12 @@
 ##################
 ### BASE STAGE ###
 ##################
-FROM rust:1.60 as base
+FROM rust:1.72.1 as base
 
 # Install build dependencies
 RUN cargo install --locked trunk strip_cargo_version
 RUN rustup target add wasm32-unknown-unknown
+RUN rustup target add x86_64-unknown-linux-musl
 
 WORKDIR /app
 RUN mkdir frontend backend common
@@ -16,6 +17,9 @@ RUN mkdir frontend backend common
 FROM base AS strip-version
 
 COPY Cargo.lock Cargo.toml ./
+COPY frontend/Cargo.toml ./frontend/
+COPY backend/Cargo.toml ./backend/
+#COPY common/Cargo.toml ./common/
 RUN strip_cargo_version
 
 ###################
@@ -23,18 +27,50 @@ RUN strip_cargo_version
 ###################
 FROM base AS build
 
-RUN cargo init --lib .
+RUN cargo init --lib frontend
+RUN cargo init --bin backend
+RUN cargo init --lib common
+
+COPY --from=strip-version /app/frontend/Cargo.toml /app/frontend/
+COPY --from=strip-version /app/backend/Cargo.toml /app/backend/
+#COPY --from=strip-version /app/common/Cargo.toml /app/common/
 COPY --from=strip-version /app/Cargo.toml /app/Cargo.lock /app/
 
+WORKDIR /app/backend
+RUN cargo build --release --target x86_64-unknown-linux-musl
+
+WORKDIR /app/frontend
 RUN cargo build --release --target wasm32-unknown-unknown
 
+WORKDIR /app
 COPY . .
 
+WORKDIR /app/backend
+RUN cargo build --release --target x86_64-unknown-linux-musl
+
+WORKDIR /app/frontend
 RUN trunk build --release
 
 ########################
 ### PRODUCTION STAGE ###
 ########################
-FROM nginx:alpine
+FROM scratch
 
-COPY --from=base /app/dist/* /usr/share/nginx/html/
+# Default logging level
+ENV RUST_LOG="info"
+
+ENV COVERS_DIR="/covers"
+VOLUME /covers
+
+WORKDIR /
+
+# Copy application binary
+COPY --from=build /app/target/x86_64-unknown-linux-musl/release/singit_srv /usr/local/bin/singit_srv
+
+# Copy static web files
+COPY --from=build /app/frontend/dist /dist
+
+# Copy database migrations
+COPY backend/migrations /migrations
+
+ENTRYPOINT ["singit_srv"]

backend/.env.example

@@ -0,0 +1 @@
+DATABASE_URL=postgresql://postgres:postgres@localhost:5432/postgres

backend/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "singit_srv"
+version = "1.0.0"
+authors = ["Joakim Hulthe <joakim@hulthe.net"]
+edition = "2021"
+
+[dependencies]
+actix-files = "0.6.2"
+actix-web = { version = "4.4.0", default-features = false, features = ["macros"] }
+clap = { version = "4.4.4", features = ["derive", "env"] }
+diesel = "2.1.1"
+diesel-async = { version = "0.4.1", features = ["postgres", "deadpool"] }
+dotenv = "0.15.0"
+env_logger = "0.10.0"
+eyre = "0.6.8"
+log = "0.4.20"
+serde = { version = "1.0.188", default-features = false, features = ["derive", "std"] }

backend/diesel.toml

@@ -0,0 +1,9 @@
+# For documentation on how to configure this file,
+# see https://diesel.rs/guides/configuring-diesel-cli
+
+[print_schema]
+file = "src/schema.rs"
+custom_type_derives = ["diesel::query_builder::QueryId"]
+
+[migrations_directory]
+dir = "migrations"

backend/dist

@@ -0,0 +1 @@
+../frontend/dist

backend/migrations/00000000000000_diesel_initial_setup/down.sql

@@ -0,0 +1,6 @@
+-- This file was automatically created by Diesel to setup helper functions
+-- and other internal bookkeeping. This file is safe to edit, any future
+-- changes will be added to existing projects as new migrations.
+
+DROP FUNCTION IF EXISTS diesel_manage_updated_at(_tbl regclass);
+DROP FUNCTION IF EXISTS diesel_set_updated_at();

backend/migrations/00000000000000_diesel_initial_setup/up.sql

@@ -0,0 +1,36 @@
+-- This file was automatically created by Diesel to setup helper functions
+-- and other internal bookkeeping. This file is safe to edit, any future
+-- changes will be added to existing projects as new migrations.
+
+
+
+
+-- Sets up a trigger for the given table to automatically set a column called
+-- `updated_at` whenever the row is modified (unless `updated_at` was included
+-- in the modified columns)
+--
+-- # Example
+--
+-- ```sql
+-- CREATE TABLE users (id SERIAL PRIMARY KEY, updated_at TIMESTAMP NOT NULL DEFAULT NOW());
+--
+-- SELECT diesel_manage_updated_at('users');
+-- ```
+CREATE OR REPLACE FUNCTION diesel_manage_updated_at(_tbl regclass) RETURNS VOID AS $$
+BEGIN
+    EXECUTE format('CREATE TRIGGER set_updated_at BEFORE UPDATE ON %s
+                    FOR EACH ROW EXECUTE PROCEDURE diesel_set_updated_at()', _tbl);
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION diesel_set_updated_at() RETURNS trigger AS $$
+BEGIN
+    IF (
+        NEW IS DISTINCT FROM OLD AND
+        NEW.updated_at IS NOT DISTINCT FROM OLD.updated_at
+    ) THEN
+        NEW.updated_at := current_timestamp;
+    END IF;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;

backend/migrations/2023-09-21-174215_add_song_table/down.sql

@@ -0,0 +1,2 @@
+DROP TABLE song;
+

backend/migrations/2023-09-21-174215_add_song_table/up.sql

@@ -0,0 +1,13 @@
+CREATE TABLE song(
+    song_hash TEXT NOT NULL PRIMARY KEY,
+    title TEXT NOT NULL,
+    artist TEXT NOT NULL,
+    cover TEXT,
+    language TEXT,
+    video TEXT,
+    year TEXT,
+    genre TEXT,
+    bpm TEXT NOT NULL,
+    duet_singer_1 TEXT,
+    duet_singer_2 TEXT
+);

backend/migrations/2023-09-21-202738_add_custom_lists/down.sql

@@ -0,0 +1,2 @@
+DROP TABLE custom_list_entry;
+DROP TABLE custom_list;

backend/migrations/2023-09-21-202738_add_custom_lists/up.sql

@@ -0,0 +1,10 @@
+CREATE TABLE custom_list (
+	id SERIAL PRIMARY KEY,
+	name TEXT UNIQUE NOT NULL
+);
+
+CREATE TABLE custom_list_entry (
+	list_id SERIAL REFERENCES custom_list(id),
+	song_hash TEXT NOT NULL REFERENCES song(song_hash),
+	PRIMARY KEY (list_id, song_hash)
+);

backend/mock/custom_lists.sql

@@ -0,0 +1,253 @@
+insert into custom_list(id, name) VALUES (1, 'tux');
+insert into custom_list_entry(list_id, song_hash) VALUES
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backend/src/db.rs

@@ -0,0 +1,23 @@
+use diesel_async::{
+    pooled_connection::{deadpool::Pool, AsyncDieselConnectionManager},
+    AsyncPgConnection,
+};
+use log::info;
+
+use crate::Opt;
+
+pub type DbPool = Pool<AsyncPgConnection>;
+
+pub async fn setup(opt: &Opt) -> eyre::Result<DbPool> {
+    let manager = AsyncDieselConnectionManager::new(&opt.database_url);
+
+    info!("setting up database pool");
+    let pool = Pool::builder(manager).build()?;
+
+    info!("testing database connection");
+    let _db_test = pool.get().await?;
+
+    // TODO: migrations
+
+    Ok(pool)
+}

backend/src/main.rs

@@ -0,0 +1,178 @@
+mod db;
+mod schema;
+
+use std::{
+    path::{Path, PathBuf},
+    sync::Arc,
+};
+
+use actix_files::NamedFile;
+use actix_web::{
+    get,
+    middleware::Logger,
+    web::{self, Json},
+    App, HttpRequest, HttpServer, Responder,
+};
+use clap::Parser;
+use diesel::{ExpressionMethods, QueryDsl, Queryable, Selectable, SelectableHelper};
+use diesel_async::RunQueryDsl;
+use dotenv::dotenv;
+use serde::{Deserialize, Serialize};
+
+use crate::db::DbPool;
+
+#[derive(
+    Serialize,
+    Deserialize,
+    Debug,
+    Clone,
+    Default,
+    PartialEq,
+    Eq,
+    PartialOrd,
+    Ord,
+    Queryable,
+    Selectable,
+)]
+#[diesel(table_name = crate::schema::song)]
+#[diesel(check_for_backend(diesel::pg::Pg))]
+pub struct Song {
+    pub song_hash: String,
+    pub title: String,
+    pub artist: String,
+    pub cover: Option<String>,
+    pub language: Option<String>,
+    pub video: Option<String>,
+    pub year: Option<String>,
+    pub genre: Option<String>,
+    pub bpm: String,
+    #[serde(rename = "duetsingerp1")]
+    pub duet_singer_1: Option<String>,
+    #[serde(rename = "duetsingerp2")]
+    pub duet_singer_2: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, Queryable, Selectable, Debug, Clone, Default)]
+#[diesel(table_name = crate::schema::custom_list)]
+#[diesel(check_for_backend(diesel::pg::Pg))]
+pub struct CustomList {
+    id: i32,
+    name: String,
+}
+
+#[get("/")]
+async fn root() -> actix_web::Result<NamedFile> {
+    let path: &Path = "dist/index.html".as_ref();
+    Ok(NamedFile::open(path)?)
+}
+
+async fn index(req: HttpRequest) -> actix_web::Result<NamedFile> {
+    let path: PathBuf = req.match_info().query("filename").parse().unwrap();
+    let path = Path::new("dist").join(path);
+    Ok(NamedFile::open(path)?)
+}
+
+#[get("/images/songs/{image}")]
+async fn song_image(
+    path: web::Path<String>,
+    opt: web::Data<Arc<Opt>>,
+) -> actix_web::Result<NamedFile> {
+    let image = path.into_inner();
+    let path = opt.covers_dir.join(image);
+    Ok(NamedFile::open(path)?)
+}
+
+#[get("/songs")]
+async fn songs(pool: web::Data<DbPool>) -> impl Responder {
+    use schema::song::dsl::*;
+
+    let mut db = pool.get().await.unwrap();
+    let songs = song.select(Song::as_select()).load(&mut db).await.unwrap();
+
+    Json(songs)
+}
+
+#[get("/custom/lists")]
+async fn custom_lists(pool: web::Data<DbPool>) -> impl Responder {
+    use schema::custom_list::dsl::*;
+
+    let mut db = pool.get().await.unwrap();
+    let lists: Vec<String> = custom_list.select(name).load(&mut db).await.unwrap();
+
+    Json(lists)
+}
+
+#[get("/custom/list/{list}")]
+async fn custom_list(pool: web::Data<DbPool>, path: web::Path<String>) -> impl Responder {
+    use schema::custom_list::dsl::*;
+    use schema::custom_list_entry::dsl::*;
+
+    let mut db = pool.get().await.unwrap();
+
+    let list: CustomList = custom_list
+        .select(CustomList::as_select())
+        .filter(name.eq(&*path))
+        .get_result(&mut db)
+        .await
+        .unwrap();
+
+    let list_entries: Vec<String> = custom_list_entry
+        .select(song_hash)
+        .filter(list_id.eq(list.id))
+        .load(&mut db)
+        .await
+        .unwrap();
+
+    Json(list_entries)
+}
+
+#[derive(Parser)]
+pub struct Opt {
+    /// Address to bind to.
+    #[clap(short, long, env = "BIND_ADDRESS", default_value = "0.0.0.0")]
+    address: String,
+
+    /// Port to bind to.
+    #[clap(short, long, env = "BIND_PORT", default_value = "8080")]
+    port: u16,
+
+    /// Postgresql URL.
+    #[clap(short, long, env = "DATABASE_URL")]
+    database_url: String,
+
+    /// Directory where song covers are stored.
+    #[clap(short, long, env = "COVERS_DIR")]
+    covers_dir: PathBuf,
+}
+
+#[actix_web::main]
+async fn main() -> eyre::Result<()> {
+    dotenv().ok();
+    let opt = Arc::new(Opt::parse());
+    env_logger::init();
+
+    let db_pool = db::setup(&opt).await?;
+    let app = {
+        let opt = Arc::clone(&opt);
+        move || {
+            let logger = Logger::default();
+
+            App::new()
+                .wrap(logger)
+                .app_data(web::Data::new(db_pool.clone()))
+                .app_data(web::Data::new(Arc::clone(&opt)))
+                .service(root)
+                .service(songs)
+                .service(song_image)
+                .service(custom_list)
+                .service(custom_lists)
+                .route("/{filename:.*}", web::get().to(index))
+        }
+    };
+    HttpServer::new(app)
+        .bind((opt.address.as_str(), opt.port))?
+        .run()
+        .await?;
+
+    Ok(())
+}

backend/src/schema.rs

@@ -0,0 +1,36 @@
+// @generated automatically by Diesel CLI.
+
+diesel::table! {
+    custom_list (id) {
+        id -> Int4,
+        name -> Text,
+    }
+}
+
+diesel::table! {
+    custom_list_entry (list_id, song_hash) {
+        list_id -> Int4,
+        song_hash -> Text,
+    }
+}
+
+diesel::table! {
+    song (song_hash) {
+        song_hash -> Text,
+        title -> Text,
+        artist -> Text,
+        cover -> Nullable<Text>,
+        language -> Nullable<Text>,
+        video -> Nullable<Text>,
+        year -> Nullable<Text>,
+        genre -> Nullable<Text>,
+        bpm -> Text,
+        duet_singer_1 -> Nullable<Text>,
+        duet_singer_2 -> Nullable<Text>,
+    }
+}
+
+diesel::joinable!(custom_list_entry -> custom_list (list_id));
+diesel::joinable!(custom_list_entry -> song (song_hash));
+
+diesel::allow_tables_to_appear_in_same_query!(custom_list, custom_list_entry, song,);

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+ "wasm-bindgen-shared",
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+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]

frontend/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "singit_web"
+version = "1.0.0"
+authors = ["Joakim Hulthe <joakim@hulthe.net"]
+edition = "2021"
+
+[dependencies]
+seed = "0.10.0"
+serde = { version = "1.0.0", features = ["derive"] }
+serde_json = "1.0.0"
+rand = "0.8.5"
+gloo-console = "0.3.0"
+gloo-net = "0.4.0"
+csv = "1.2.2"
+thiserror = "1.0.48"
+wasm-bindgen = "0.2.87"
+
+[dependencies.css_typegen]
+git = "https://github.com/hulthe/css_typegen.git"
+branch = "master"

frontend/build.rs

@@ -0,0 +1,26 @@
+use std::fs;
+use std::path::Path;
+use std::io;
+
+fn main() {
+    index_default_covers().expect("index default covers");
+}
+
+/// Index all pngs in static/images/default_covers and expose the list in the build as an
+/// environment variable DEFAULT_SONG_COVERS. This list includes the path to the images so the
+/// frontend can fetch them.
+fn index_default_covers() -> io::Result<()> {
+    let mut files = vec![];
+    for dir in fs::read_dir("static/images/default_covers")? {
+        let path = dir?.path();
+        if path.extension().and_then(|s| s.to_str()) == Some("png") {
+            let path = Path::new("/").join(path.strip_prefix("static").unwrap());
+            files.push(path.to_string_lossy().to_string());
+        }
+    }
+
+    let list = files.join(",");
+    println!("cargo:rustc-env=DEFAULT_SONG_COVERS={list}");
+
+    Ok(())
+}

frontend/src/app.rs

@@ -1,45 +1,81 @@
 use crate::css::C;
+use crate::custom_list::{fetch_custom_song_list, fetch_custom_song_list_index, CustomLists};
+use crate::fetch::fetch_list_of;
 use crate::fuzzy::FuzzyScore;
 use crate::query::ParsedQuery;
 use crate::song::Song;
-use anyhow::anyhow;
+use gloo_console::error;
 use rand::seq::SliceRandom;
 use rand::thread_rng;
 use seed::app::cmds::timeout;
 use seed::browser::util::document;
 use seed::prelude::*;
-use seed::{attrs, button, div, empty, error, img, input, p, span, C, IF};
+use seed::{attrs, button, div, empty, img, input, p, span, C, IF};
 use std::cmp::Reverse;
+use std::collections::HashSet;
+use std::collections::hash_map::DefaultHasher;
+use std::hash::{Hash, Hasher};
 use web_sys::Element;
 
 pub struct Model {
     songs: Vec<(Reverse<FuzzyScore>, Song)>,
 
-    /// The search string
+    /// Custom song lists, lazily loaded.
+    custom_lists: CustomLists,
+
+    /// The search string.
     query: String,
 
-    /// The number of songs currently in view. Goes up when the user scrolls down.
+    /// The number of songs currently in the dom. Goes up when the user scrolls down.
     shown_songs: usize,
 
-    /// The number of songs that didn't match the search critera
+    /// The number of songs that didn't match the search critera.
     hidden_songs: usize,
 
-    /// Whether we're filtering by video
+    /// Whether we're filtering by video.
     filter_video: bool,
 
-    /// Whether we're filtering by duets
+    /// Whether we're filtering by duets.
     filter_duets: bool,
 
     query_placeholder: String,
     query_placeholder_len: usize,
 
     autotyper: Option<CmdHandle>,
+
+    /// URLs of some defaults for songs with missing cover art.
+    default_song_covers: Vec<&'static str>,
+}
+
+#[derive(Default)]
+pub enum Loading<T> {
+    /// The resource has not started loading.
+    #[default]
+    NotLoaded,
+
+    /// The resource is currently loading.
+    InProgress,
+
+    /// The resource has loaded.
+    Loaded(T),
 }
 
 const SCROLL_THRESHOLD: usize = 50;
 const INITIAL_ELEM_COUNT: usize = 100;
 
 pub enum Msg {
+    /// Loaded songs.
+    Songs(Vec<Song>),
+
+    /// Loaded custom song index.
+    CustomSongLists(Vec<String>),
+
+    /// Loaded custom song list.
+    CustomSongList {
+        list: String,
+        song_hashes: HashSet<String>,
+    },
+
     /// The user entered something into the search field
     Search(String),
 
@@ -60,15 +96,16 @@ pub enum Msg {
 }
 
 pub fn init(_url: Url, orders: &mut impl Orders<Msg>) -> Model {
-    let mut songs: Vec<Song> =
-        serde_json::from_str(include_str!("../static/songs.json")).expect("parse songs");
-    songs.shuffle(&mut thread_rng());
+    orders.perform_cmd(fetch_songs());
+    orders.perform_cmd(fetch_custom_song_list_index());
+
+    // get list of default song covers. see build.rs
+    const DEFAULT_SONG_COVERS: &str = env!("DEFAULT_SONG_COVERS");
+    let default_song_covers = DEFAULT_SONG_COVERS.split(',').collect();
 
     Model {
-        songs: songs
-            .into_iter()
-            .map(|song| (Default::default(), song))
-            .collect(),
+        songs: vec![],
+        custom_lists: Default::default(),
         query: String::new(),
         hidden_songs: 0,
         shown_songs: INITIAL_ELEM_COUNT,
@@ -77,39 +114,72 @@ pub fn init(_url: Url, orders: &mut impl Orders<Msg>) -> Model {
         query_placeholder: String::from("Sök"),
         query_placeholder_len: 0,
         autotyper: Some(orders.perform_cmd_with_handle(timeout(500, || Msg::Autotyper))),
+        default_song_covers,
+    }
+}
+
+fn update_song_list(model: &mut Model, orders: &mut impl Orders<Msg>) {
+    model.hidden_songs = 0;
+    model.shown_songs = INITIAL_ELEM_COUNT;
+    scroll_to_top();
+
+    if model.query.is_empty() {
+        model.filter_duets = false;
+        model.filter_video = false;
+        update(Msg::Shuffle, model, orders);
+    } else {
+        let query = ParsedQuery::parse(&model.query);
+        model.filter_duets = query.duet == Some(true);
+        model.filter_video = query.video == Some(true);
+
+        if let Some(name) = query.list {
+            if let Some(l @ Loading::NotLoaded) = model.custom_lists.get_mut(name) {
+                orders.perform_cmd(fetch_custom_song_list(name.to_string()));
+                *l = Loading::InProgress;
+            }
+        }
+
+        // calculate search scores & sort list
+        for (score, song) in model.songs.iter_mut() {
+            let new_score = song.fuzzy_compare(&query, &model.custom_lists);
+            if new_score < Default::default() {
+                model.hidden_songs += 1;
+            }
+
+            *score = Reverse(new_score);
+        }
+        model.songs.sort_unstable();
     }
 }
 
 pub fn update(msg: Msg, model: &mut Model, orders: &mut impl Orders<Msg>) {
     match msg {
-        Msg::Search(query) => {
-            model.hidden_songs = 0;
-            model.shown_songs = INITIAL_ELEM_COUNT;
-            scroll_to_top();
+        Msg::Songs(songs) => {
+            model.songs = songs
+                .into_iter()
+                .map(|song| (Default::default(), song))
+                .collect();
+        }
+        Msg::CustomSongLists(lists) => {
+            model.custom_lists = lists
+                .into_iter()
+                .map(|list| (list, Loading::NotLoaded))
+                .collect();
+        }
+        Msg::CustomSongList { list, song_hashes } => {
+            let query = ParsedQuery::parse(&model.query);
+            let update_list = query.list == Some(&list);
 
-            model.query = query;
+            *model.custom_lists.entry(list).or_default() = Loading::Loaded(song_hashes);
 
-            if model.query.is_empty() {
-                model.filter_duets = false;
-                model.filter_video = false;
-                update(Msg::Shuffle, model, orders);
-            } else {
-                let query = ParsedQuery::parse(&model.query);
-                model.filter_duets = query.duet == Some(true);
-                model.filter_video = query.video == Some(true);
-
-                // calculate search scores & sort list
-                for (score, song) in model.songs.iter_mut() {
-                    let new_score = song.fuzzy_compare(&query);
-                    if new_score < Default::default() {
-                        model.hidden_songs += 1;
-                    }
-
-                    *score = Reverse(new_score);
-                }
-                model.songs.sort_unstable();
+            if update_list {
+                update_song_list(model, orders);
             }
         }
+        Msg::Search(query) => {
+            model.query = query;
+            update_song_list(model, orders);
+        }
         Msg::ToggleVideo => {
             let mut query = ParsedQuery::parse(&model.query);
             query.video = match query.video {
@@ -135,12 +205,9 @@ pub fn update(msg: Msg, model: &mut Model, orders: &mut impl Orders<Msg>) {
             autotype_song(model, orders);
         }
         Msg::Scroll => {
-            let (scroll, max_scroll) = match get_scroll() {
-                Ok(v) => v,
-                Err(e) => {
-                    error!(e);
-                    return;
-                }
+            let Some((scroll, max_scroll)) = get_scroll() else {
+                error!("Failed to get song list element by id:", SONG_LIST_ID);
+                return;
             };
 
             let scroll_left: i32 = max_scroll - scroll;
@@ -171,6 +238,7 @@ pub fn update(msg: Msg, model: &mut Model, orders: &mut impl Orders<Msg>) {
 }
 
 pub fn view(model: &Model) -> Vec<Node<Msg>> {
+
     let song_card = |song: &Song| -> Node<Msg> {
         div![
             C![C.song_item],
@@ -178,7 +246,16 @@ pub fn view(model: &Model) -> Vec<Node<Msg>> {
                 C![C.song_item_cover],
                 match song.cover {
                     Some(_) => attrs! {At::Src => format!("/images/songs/{}.png", song.song_hash)},
-                    None => attrs! {At::Src => "/images/default_cover.png"},
+                    None => {
+                        // use a DefaultHasher to turn the song_hash string into a number we can
+                        // use to give the song a psuedo-random default cover.
+                        let mut hasher = DefaultHasher::new();
+                        song.song_hash.hash(&mut hasher);
+                        let hash = hasher.finish() as usize;
+                        let cover_i = hash % model.default_song_covers.len();
+                        let cover = model.default_song_covers[cover_i];
+                        attrs! { At::Src => cover }
+                    }
                 },
             ],
             div![
@@ -284,6 +361,20 @@ pub fn view(model: &Model) -> Vec<Node<Msg>> {
     ]
 }
 
+async fn fetch_songs() -> Option<Msg> {
+    let mut songs: Vec<Song> = match fetch_list_of("/songs").await {
+        Ok(response) => response,
+        Err(e) => {
+            error!("Error fetching songs:", e);
+            return None;
+        }
+    };
+
+    songs.shuffle(&mut thread_rng());
+
+    Some(Msg::Songs(songs))
+}
+
 pub fn autotype_song(model: &mut Model, orders: &mut impl Orders<Msg>) {
     let (_, song) = &model.songs[0];
     model.query_placeholder = ParsedQuery::random(song, &mut thread_rng()).to_string();
@@ -293,22 +384,20 @@ pub fn autotype_song(model: &mut Model, orders: &mut impl Orders<Msg>) {
 
 const SONG_LIST_ID: &str = "song_list";
 
-fn get_song_list_element() -> anyhow::Result<Element> {
-    document()
-        .get_element_by_id(SONG_LIST_ID)
-        .ok_or_else(|| anyhow!("Failed to access song list element"))
+fn get_song_list_element() -> Option<Element> {
+    document().get_element_by_id(SONG_LIST_ID)
 }
 
 fn scroll_to_top() {
-    if let Ok(elem) = get_song_list_element() {
+    if let Some(elem) = get_song_list_element() {
         elem.scroll_to_with_x_and_y(0.0, 0.0);
     }
 }
 
-fn get_scroll() -> anyhow::Result<(i32, i32)> {
+fn get_scroll() -> Option<(i32, i32)> {
     let list = get_song_list_element()?;
     let scroll = list.scroll_top();
     let height = list.client_height();
     let max = (list.scroll_height() - height).max(0);
-    Ok((scroll, max))
+    Some((scroll, max))
 }

frontend/src/css.rs

@@ -4,4 +4,4 @@ use css_typegen::css_typegen;
 
 // Generate rust types for css-classes.
 // Used for autocompletion and extra compile-time checks.
-css_typegen!("static/styles");
+css_typegen!("frontend/static/styles");

frontend/src/custom_list.rs

@@ -0,0 +1,34 @@
+use std::collections::{HashMap, HashSet};
+
+use gloo_console::error;
+
+use crate::{
+    app::{Loading, Msg},
+    fetch::fetch_list_of,
+};
+
+pub type CustomLists = HashMap<String, Loading<HashSet<String>>>;
+
+pub async fn fetch_custom_song_list_index() -> Option<Msg> {
+    let custom_lists: Vec<String> = match fetch_list_of("/custom/lists").await {
+        Ok(response) => response,
+        Err(e) => {
+            error!("Failed fetching custom song list index:", e);
+            return None;
+        }
+    };
+
+    Some(Msg::CustomSongLists(custom_lists))
+}
+
+pub async fn fetch_custom_song_list(list: String) -> Option<Msg> {
+    let song_hashes: HashSet<String> = match fetch_list_of(format!("/custom/list/{list}")).await {
+        Ok(response) => response.into_iter().collect(),
+        Err(e) => {
+            error!("Failed fetching custom song list:", e);
+            return None;
+        }
+    };
+
+    Some(Msg::CustomSongList { list, song_hashes })
+}

frontend/src/fetch.rs

@@ -0,0 +1,70 @@
+use std::io::Cursor;
+
+use gloo_net::http::{Request, Response};
+use serde::de::DeserializeOwned;
+use wasm_bindgen::{JsError, JsValue};
+
+const HTTP_ACCEPT: &str = concat!("text/csv, ", "application/json;q=0.9");
+
+#[derive(Debug, thiserror::Error)]
+pub enum FetchError {
+    /// The request returned a non-2XX status code.
+    #[error("server responded with {code} {text}")]
+    Status { code: u16, text: String },
+
+    /// The response contained an unrecognized or missing content type.
+    #[error("unknown content type {0:?}")]
+    UnknownContentType(Option<String>),
+
+    /// Another error occured.
+    #[error("{0}")]
+    Other(#[from] gloo_net::Error),
+
+    #[error("error deserializing csv: {0}")]
+    Csv(#[from] csv::Error),
+}
+
+impl From<FetchError> for JsValue {
+    fn from(e: FetchError) -> Self {
+        JsError::new(&e.to_string()).into()
+    }
+}
+
+/// Perform a GET request.
+pub async fn fetch(url: impl AsRef<str>) -> Result<Response, FetchError> {
+    let response = Request::get(url.as_ref())
+        .header("accept", HTTP_ACCEPT)
+        .send()
+        .await?;
+
+    if !response.ok() {
+        return Err(FetchError::Status {
+            code: response.status(),
+            text: response.status_text(),
+        });
+    }
+
+    Ok(response)
+}
+
+/// Perform a GET request and try to deserialize the response as a `Vec<T>`.
+pub async fn fetch_list_of<T: DeserializeOwned>(
+    url: impl AsRef<str>,
+) -> Result<Vec<T>, FetchError> {
+    let response = fetch(url.as_ref()).await?;
+    let headers = response.headers();
+    let content_type = headers.get("Content-Type").map(|s| s.to_lowercase());
+
+    match content_type.as_deref() {
+        Some("text/csv") => {
+            let text = response.text().await?;
+            let reader = csv::Reader::from_reader(Cursor::new(text)).into_deserialize();
+            let list = reader
+                .map(|r| r.map_err(FetchError::from))
+                .collect::<Result<_, _>>()?;
+            Ok(list)
+        }
+        Some("application/json") => Ok(response.json().await?),
+        _ => Err(FetchError::UnknownContentType(content_type)),
+    }
+}

frontend/src/main.rs

@@ -1,13 +1,13 @@
 mod app;
 mod css;
+mod custom_list;
+mod fetch;
 mod fuzzy;
 mod query;
 mod song;
 
-use seed::prelude::wasm_bindgen;
 use seed::App;
 
-#[wasm_bindgen(start)]
-pub fn start() {
+fn main() {
     App::start("app", app::init, app::update, app::view);
 }

frontend/src/query.rs

@@ -30,6 +30,9 @@ pub struct ParsedQuery<'a> {
 
     /// Query from a specifc year
     pub year: Option<&'a str>,
+
+    /// Query songs from the specified custom list.
+    pub list: Option<&'a str>,
 }
 
 impl<'a> ParsedQuery<'a> {
@@ -50,6 +53,7 @@ impl<'a> ParsedQuery<'a> {
                 "lang" => parsed.language = Some(v),
                 "genre" => parsed.genre = Some(v),
                 "year" => parsed.year = Some(v),
+                "list" => parsed.list = Some(v),
                 _ => {}
             }
         }
@@ -59,8 +63,7 @@ impl<'a> ParsedQuery<'a> {
 
     /// Generate a parsed query with a few random fields matching a song
     pub fn random<R: Rng>(song: &'a Song, rng: &mut R) -> Self {
-        let until_space =
-            |s: &'a str| -> &'a str { s.trim().split_whitespace().next().unwrap_or("") };
+        let until_space = |s: &'a str| -> &'a str { s.split_whitespace().next().unwrap_or("") };
 
         let join_spaces = |s: &'a str| -> Cow<'a, str> {
             let s = s.trim();
@@ -119,8 +122,8 @@ impl<'a> ParsedQuery<'a> {
 
 fn parse_bool(s: &str) -> Option<bool> {
     match s {
-        "true" | "yes" => Some(true),
-        "false" | "no" => Some(false),
+        "true" | "yes" | "y" => Some(true),
+        "false" | "no" | "n" => Some(false),
         _ => None,
     }
 }
@@ -137,7 +140,7 @@ fn extract_plain(s: &str) -> Option<Cow<str>> {
                 a
             });
 
-    plain.is_empty().not().then(|| Cow::Owned(plain))
+    plain.is_empty().not().then_some(Cow::Owned(plain))
 }
 
 fn extract_key_values(s: &str) -> impl Iterator<Item = (&str, &str)> {
@@ -173,6 +176,7 @@ impl Display for ParsedQuery<'_> {
         w("lang:", display(&self.language))?;
         w("genre:", display(&self.genre))?;
         w("year:", display(&self.year))?;
+        w("list:", display(&self.list))?;
 
         Ok(())
     }

frontend/src/song.rs

@@ -1,3 +1,5 @@
+use crate::app::Loading;
+use crate::custom_list::CustomLists;
 use crate::fuzzy::{self, FuzzyScore};
 use crate::query::ParsedQuery;
 use serde::Deserialize;
@@ -27,8 +29,8 @@ impl Song {
             .zip(self.duet_singer_2.as_deref())
     }
 
-    pub fn fuzzy_compare(&self, query: &ParsedQuery) -> FuzzyScore {
-        let bad = || -1;
+    pub fn fuzzy_compare(&self, query: &ParsedQuery, custom_lists: &CustomLists) -> FuzzyScore {
+        let bad: FuzzyScore = -1;
 
         let filter_strs = |query: Option<&str>, item: Option<&str>| {
             if let Some(query) = query {
@@ -56,7 +58,17 @@ impl Song {
         ];
 
         if !filters.iter().all(|f| f()) {
-            return bad();
+            return bad;
+        }
+
+        if let Some(list) = query.list {
+            let Some(Loading::Loaded(list)) = custom_lists.get(list) else {
+                return bad;
+            };
+
+            if !list.contains(&self.song_hash) {
+                return bad;
+            }
         }
 
         let mut score = FuzzyScore::default();