From adec590fa2a8e8df833b3446530b7205749fe307 Mon Sep 17 00:00:00 2001
From: Agatha Lovelace <agatha@technogothic.net>
Date: Thu, 1 Sep 2022 16:35:11 +0200
Subject: [PATCH] Initial commit

---
 .gitignore                                    |    1 +
 Cargo.lock                                    | 2742 +++++++++++++++++
 Cargo.toml                                    |   24 +
 src/backend/config.rs                         |   75 +
 src/backend/fetching.rs                       |  189 ++
 .../m20220803_000001_create_library.rs        |   71 +
 ...20220803_000001_create_playlist_entries.rs |   69 +
 .../m20220803_000001_create_playlists.rs      |   44 +
 src/backend/migrator/mod.rs                   |   18 +
 src/backend/mod.rs                            |   38 +
 src/backend/model/library.rs                  |   35 +
 src/backend/model/mod.rs                      |    7 +
 src/backend/model/playlist_entries.rs         |   48 +
 src/backend/model/playlists.rs                |   26 +
 src/backend/model/prelude.rs                  |    5 +
 src/backend/playback.rs                       |    0
 src/backend/utils.rs                          |   18 +
 src/gui/mod.rs                                |    0
 src/main.rs                                   |   55 +
 19 files changed, 3465 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/backend/config.rs
 create mode 100644 src/backend/fetching.rs
 create mode 100644 src/backend/migrator/m20220803_000001_create_library.rs
 create mode 100644 src/backend/migrator/m20220803_000001_create_playlist_entries.rs
 create mode 100644 src/backend/migrator/m20220803_000001_create_playlists.rs
 create mode 100644 src/backend/migrator/mod.rs
 create mode 100644 src/backend/mod.rs
 create mode 100644 src/backend/model/library.rs
 create mode 100644 src/backend/model/mod.rs
 create mode 100644 src/backend/model/playlist_entries.rs
 create mode 100644 src/backend/model/playlists.rs
 create mode 100644 src/backend/model/prelude.rs
 create mode 100644 src/backend/playback.rs
 create mode 100644 src/backend/utils.rs
 create mode 100644 src/gui/mod.rs
 create mode 100644 src/main.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
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+++ b/.gitignore
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diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..a315c47
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+++ b/Cargo.lock
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+ "once_cell",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
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+ "quote",
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+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
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+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
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+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
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+[[package]]
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..e1c909a
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,24 @@
+[package]
+name = "eleanor"
+version = "0.1.0"
+edition = "2021"
+authors = ["Agatha Lovelace <agatha@technogothic.net>"]
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+adler = "1.0.2"
+dirs = "4.0.0"
+lofty = "0.7.3"
+miette = { version = "5.2.0", features = ["fancy"] }
+mime = "0.3.16"
+mime_guess = "2.0.4"
+paris = { version = "1.5.13", features = ["macros"] }
+sea-orm = { version = "0.9.1", features = ["sqlx-sqlite", "runtime-tokio-native-tls", "macros"] }
+sea-orm-migration = "^0.9.0"
+sea-query = "0.26.2"
+serde = { version = "1.0.142", features = ["derive"] }
+symphonia = { version = "0.5.1", features = ["flac", "mp3", "vorbis", "ogg", "wav"] }
+tokio = { version = "1.20.1", features = ["full"] }
+toml = "0.5.9"
+walkdir = "2.3.2"
diff --git a/src/backend/config.rs b/src/backend/config.rs
new file mode 100644
index 0000000..d415c4c
--- /dev/null
+++ b/src/backend/config.rs
@@ -0,0 +1,75 @@
+use std::{fs::File, io::Write};
+
+use super::utils::config_dir;
+use miette::{miette, IntoDiagnostic, Result};
+use serde::{Deserialize, Serialize};
+
+/// Determines if the files will be loaded from a local path or remotely
+#[derive(Serialize, Deserialize, Debug)]
+#[serde(untagged)]
+pub enum SourceKind {
+    /// Path to a directory
+    Local { path: String },
+    /// Remote server address
+    Remote { address: String },
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct Source {
+    pub id: u8,
+    pub name: String,
+    #[serde(flatten)]
+    pub source: SourceKind,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct Config {
+    pub cache_expire_days: usize,
+    pub crossfade: bool,
+    pub crossfade_duration: u8,
+    pub song_change_notification: bool,
+    pub volume: f32,
+    pub sources: Vec<Source>,
+}
+impl Config {
+    pub fn read_config() -> Result<Self> {
+        let file = config_dir()
+            .and_then(|v| Some(v.join("settings.toml")))
+            .ok_or(miette!("Configuration file not found"))?;
+
+        let contents = std::fs::read_to_string(file).into_diagnostic()?;
+
+        toml::from_str(&contents).into_diagnostic()
+    }
+
+    pub fn write_config(config: &Config) -> Result<()> {
+        let contents = toml::to_string(config).into_diagnostic()?;
+
+        let path = config_dir()
+            .and_then(|v| Some(v.join("settings.toml")))
+            .ok_or(miette!("Configuration file not found"))?;
+
+        File::create(path)
+            .and_then(|mut v| v.write_all(contents.as_bytes()))
+            .into_diagnostic()
+    }
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Config {
+            cache_expire_days: 30,
+            crossfade: false,
+            crossfade_duration: 5,
+            song_change_notification: false,
+            volume: 0.5,
+            sources: vec![Source {
+                id: 0,
+                name: "Music".into(),
+                source: SourceKind::Local {
+                    path: "/home/agatha/Music/local".into(),
+                },
+            }],
+        }
+    }
+}
diff --git a/src/backend/fetching.rs b/src/backend/fetching.rs
new file mode 100644
index 0000000..feb076a
--- /dev/null
+++ b/src/backend/fetching.rs
@@ -0,0 +1,189 @@
+use std::{
+    ffi::{OsStr, OsString},
+    fs::File,
+    hash::Hasher,
+    path::Path,
+};
+
+use super::{
+    config::{Config, Source, SourceKind},
+    model::library,
+};
+use adler::Adler32;
+use lofty::{read_from_path, Accessor, AudioFile};
+use miette::{miette, IntoDiagnostic, Result};
+use paris::{success, warn};
+use sea_orm::{ColumnTrait, DatabaseConnection, EntityTrait, QueryFilter, QuerySelect, Set};
+use symphonia::{
+    core::{
+        io::MediaSourceStream,
+        meta::{Limit, MetadataOptions},
+        probe::Hint,
+    },
+    default::get_probe,
+};
+use walkdir::WalkDir;
+
+#[derive(PartialEq, Debug)]
+pub enum IndexMode {
+    Purge,
+    New,
+    Initial,
+}
+
+pub async fn index_source(source: Source, mode: IndexMode, db: &DatabaseConnection) -> Result<()> {
+    let mut existing: Vec<OsString> = vec![];
+
+    // Force reindex source
+    if mode == IndexMode::Purge {
+        warn!("Overwriting source {}", source.id);
+
+        library::Entity::delete_many()
+            .filter(library::Column::SourceId.eq(source.id))
+            .exec(db)
+            .await
+            .into_diagnostic()?;
+    // Only index new songs
+    } else if mode == IndexMode::New {
+        existing = library::Entity::find()
+            .filter(library::Column::SourceId.eq(source.id))
+            .column(library::Column::Filename)
+            .all(db)
+            .await
+            .into_diagnostic()?
+            .into_iter()
+            .map(|v| v.filename.into())
+            .collect();
+    }
+
+    match source.source {
+        SourceKind::Local { path } => {
+            for file in WalkDir::new(path)
+                .into_iter()
+                .filter_map(Result::ok)
+                .filter(|e| !e.file_type().is_dir())
+                .filter(|e| {
+                    mime_guess::from_path(e.path())
+                        .first()
+                        .and_then(|v| Some(v.type_() == mime::AUDIO))
+                        .unwrap_or(false)
+                })
+            {
+                if mode == IndexMode::New {
+                    if existing.contains(&file.file_name().into()) {
+                        continue;
+                    };
+                }
+
+                let audio = read_from_path(file.path(), true).into_diagnostic()?;
+
+                let tags = audio.first_tag();
+                let properties = audio.properties();
+
+                let hash = hash_file(file.path())?;
+
+                let song: library::ActiveModel = library::ActiveModel {
+                    path: Set(file
+                        .path()
+                        .parent()
+                        .and_then(Path::to_str)
+                        .ok_or(miette!("Couldn't get path for file {:?}", file))?
+                        .to_string()),
+                    filename: Set(file
+                        .file_name()
+                        .to_str()
+                        .ok_or(miette!("Couldn't get filename for file {:?}", file))?
+                        .to_string()),
+                    source_id: Set(source.id.into()),
+                    hash: Set(hash.try_into().into_diagnostic()?),
+                    artist: Set(tags
+                        .and_then(|t| t.artist())
+                        .and_then(|t| Some(t.to_string()))),
+                    name: Set(tags
+                        .and_then(|t| t.title())
+                        .and_then(|t| Some(t.to_string()))),
+                    album: Set(tags
+                        .and_then(|t| t.album())
+                        .and_then(|t| Some(t.to_string()))),
+                    genres: Set(tags
+                        .and_then(|t| t.genre())
+                        .and_then(|t| Some(t.to_string()))),
+                    track: Set(tags.and_then(|t| t.track()).and_then(|t| Some(t as i32))),
+                    year: Set(tags.and_then(|t| t.year()).and_then(|t| Some(t as i32))),
+                    duration: Set(properties
+                        .duration()
+                        .as_millis()
+                        .try_into()
+                        .into_diagnostic()?),
+                    ..Default::default()
+                };
+
+                library::Entity::insert(song)
+                    .on_conflict(
+                        sea_query::OnConflict::column(library::Column::Filename)
+                            .do_nothing()
+                            .to_owned(),
+                    )
+                    .exec(db)
+                    .await
+                    .into_diagnostic()?;
+            }
+        }
+        SourceKind::Remote { address } => {
+            unimplemented!();
+        }
+    }
+
+    success!("Indexed source {} in {:?} mode", source.id, mode);
+    Ok(())
+}
+
+pub async fn index_initial(db: &DatabaseConnection) -> Result<()> {
+    let sources = Config::read_config()?.sources;
+
+    for source in sources {
+        index_source(source, IndexMode::Initial, db).await?;
+    }
+
+    Ok(())
+}
+
+pub async fn index_new(db: &DatabaseConnection) -> Result<()> {
+    let sources = Config::read_config()?.sources;
+
+    for source in sources {
+        index_source(source, IndexMode::New, db).await?;
+    }
+
+    Ok(())
+}
+
+fn hash_file(path: &Path) -> Result<u64> {
+    let file = Box::new(File::open(path).into_diagnostic()?);
+
+    let probe = get_probe();
+
+    let ext = path.extension().and_then(OsStr::to_str).unwrap_or("");
+
+    let source = MediaSourceStream::new(file, Default::default());
+    let mut data = probe
+        .format(
+            &Hint::new().with_extension(ext),
+            source,
+            &Default::default(),
+            &MetadataOptions {
+                limit_metadata_bytes: Limit::Maximum(0),
+                limit_visual_bytes: Limit::Maximum(0),
+            },
+        )
+        .into_diagnostic()?
+        .format;
+
+    let mut adler = Adler32::new();
+
+    while let Ok(packet) = data.next_packet() {
+        adler.write(&packet.data);
+    }
+
+    Ok(adler.finish())
+}
diff --git a/src/backend/migrator/m20220803_000001_create_library.rs b/src/backend/migrator/m20220803_000001_create_library.rs
new file mode 100644
index 0000000..1ba8f5f
--- /dev/null
+++ b/src/backend/migrator/m20220803_000001_create_library.rs
@@ -0,0 +1,71 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_table(
+                Table::create()
+                    .table(Song::Table)
+                    .if_not_exists()
+                    .col(
+                        ColumnDef::new(Song::Id)
+                            .integer()
+                            .not_null()
+                            .auto_increment()
+                            .primary_key(),
+                    )
+                    .col(ColumnDef::new(Song::Path).string().not_null())
+                    .col(
+                        ColumnDef::new(Song::Filename)
+                            .string()
+                            .not_null()
+                            .unique_key(),
+                    )
+                    .col(ColumnDef::new(Song::SourceId).integer().not_null())
+                    .col(ColumnDef::new(Song::Hash).integer().not_null().unique_key())
+                    .col(ColumnDef::new(Song::Artist).string())
+                    .col(ColumnDef::new(Song::Name).string())
+                    .col(ColumnDef::new(Song::Album).string())
+                    .col(ColumnDef::new(Song::Duration).integer().not_null())
+                    .col(ColumnDef::new(Song::Genres).string())
+                    .col(ColumnDef::new(Song::Track).integer())
+                    .col(ColumnDef::new(Song::Year).integer())
+                    .to_owned(),
+            )
+            .await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_table(Table::drop().table(Song::Table).to_owned())
+            .await
+    }
+}
+
+/// A Table containing every indexed song
+#[derive(Iden)]
+pub enum Song {
+    #[iden = "library"]
+    Table,
+    /// Id of the song
+    Id,
+    Path,
+    Filename,
+    /// Refers to the sources defined in the configuration file and determines if file is remote
+    SourceId,
+    /// A hash of the song's samples as Vec<f32>
+    Hash,
+    Artist,
+    Name,
+    Album,
+    Duration,
+    /// Comma separated list of genres
+    Genres,
+    /// Number of the track in the album
+    Track,
+    Year,
+}
diff --git a/src/backend/migrator/m20220803_000001_create_playlist_entries.rs b/src/backend/migrator/m20220803_000001_create_playlist_entries.rs
new file mode 100644
index 0000000..74d1f75
--- /dev/null
+++ b/src/backend/migrator/m20220803_000001_create_playlist_entries.rs
@@ -0,0 +1,69 @@
+use sea_orm_migration::prelude::*;
+
+use super::{m20220803_000001_create_library::Song, m20220803_000001_create_playlists::Playlist};
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_table(
+                Table::create()
+                    .table(PlaylistEntry::Table)
+                    .if_not_exists()
+                    .col(
+                        ColumnDef::new(PlaylistEntry::Id)
+                            .integer()
+                            .not_null()
+                            .auto_increment()
+                            .primary_key(),
+                    )
+                    .col(
+                        ColumnDef::new(PlaylistEntry::PlaylistId)
+                            .integer()
+                            .not_null(),
+                    )
+                    .col(ColumnDef::new(PlaylistEntry::SongHash).integer().not_null())
+                    .col(ColumnDef::new(PlaylistEntry::Ordinal).integer())
+                    .col(ColumnDef::new(PlaylistEntry::AddedDate).integer())
+                    .foreign_key(
+                        ForeignKey::create()
+                            .name("fk-playlist-id")
+                            .from(PlaylistEntry::Table, PlaylistEntry::PlaylistId)
+                            .to(Playlist::Table, Playlist::Id),
+                    )
+                    .foreign_key(
+                        ForeignKey::create()
+                            .name("fk-song-hash")
+                            .from(PlaylistEntry::Table, PlaylistEntry::SongHash)
+                            .to(Song::Table, Song::Hash),
+                    )
+                    .to_owned(),
+            )
+            .await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_table(Table::drop().table(PlaylistEntry::Table).to_owned())
+            .await
+    }
+}
+
+/// A Table containing mappings between playlist and song
+#[derive(Iden)]
+pub enum PlaylistEntry {
+    #[iden = "playlist_entries"]
+    Table,
+    Id,
+    /// Id of playlist containing a song
+    PlaylistId,
+    /// Id of the song in the playlist
+    SongHash,
+    /// Position of song in playlist
+    Ordinal,
+    /// Date when the song was added
+    AddedDate,
+}
diff --git a/src/backend/migrator/m20220803_000001_create_playlists.rs b/src/backend/migrator/m20220803_000001_create_playlists.rs
new file mode 100644
index 0000000..27ffdeb
--- /dev/null
+++ b/src/backend/migrator/m20220803_000001_create_playlists.rs
@@ -0,0 +1,44 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_table(
+                Table::create()
+                    .table(Playlist::Table)
+                    .if_not_exists()
+                    .col(
+                        ColumnDef::new(Playlist::Id)
+                            .integer()
+                            .not_null()
+                            .auto_increment()
+                            .primary_key(),
+                    )
+                    .col(ColumnDef::new(Playlist::Name).string())
+                    .col(ColumnDef::new(Playlist::SortOrder).string())
+                    .to_owned(),
+            )
+            .await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_table(Table::drop().table(Playlist::Table).to_owned())
+            .await
+    }
+}
+
+/// A Table containing created playlists
+#[derive(Iden)]
+pub enum Playlist {
+    #[iden = "playlists"]
+    Table,
+    /// Playlist Id
+    Id,
+    Name,
+    SortOrder,
+}
diff --git a/src/backend/migrator/mod.rs b/src/backend/migrator/mod.rs
new file mode 100644
index 0000000..255efe4
--- /dev/null
+++ b/src/backend/migrator/mod.rs
@@ -0,0 +1,18 @@
+use sea_orm_migration::prelude::*;
+
+mod m20220803_000001_create_library;
+mod m20220803_000001_create_playlist_entries;
+mod m20220803_000001_create_playlists;
+
+pub struct Migrator;
+
+#[async_trait::async_trait]
+impl MigratorTrait for Migrator {
+    fn migrations() -> Vec<Box<dyn MigrationTrait>> {
+        vec![
+            Box::new(m20220803_000001_create_library::Migration),
+            Box::new(m20220803_000001_create_playlists::Migration),
+            Box::new(m20220803_000001_create_playlist_entries::Migration),
+        ]
+    }
+}
diff --git a/src/backend/mod.rs b/src/backend/mod.rs
new file mode 100644
index 0000000..3d74525
--- /dev/null
+++ b/src/backend/mod.rs
@@ -0,0 +1,38 @@
+pub mod config;
+pub mod fetching;
+mod migrator;
+pub mod model;
+pub mod playback;
+pub mod utils;
+
+use std::fs::{create_dir_all, File};
+
+use miette::{miette, IntoDiagnostic, Result};
+use migrator::Migrator;
+use paris::success;
+use sea_orm_migration::prelude::*;
+
+use self::{config::Config, utils::config_dir};
+
+/// Create the necessary files on first run
+pub fn create_app_data() -> Result<()> {
+    let path = config_dir().ok_or(miette!("Configuration directory does not exist"))?;
+
+    // Create Eleanor's config directory
+    create_dir_all(&path).into_diagnostic()?;
+
+    File::create(&path.join("eleanor.db")).into_diagnostic()?;
+    Config::write_config(&Default::default())?;
+    success!("Created configuration file");
+
+    Ok(())
+}
+
+/// Run unapplied migrations
+pub async fn prepare_db(db: &sea_orm::DatabaseConnection) -> Result<()> {
+    Migrator::up(db, None).await.into_diagnostic()?;
+
+    success!("Applied migrations");
+
+    Ok(())
+}
diff --git a/src/backend/model/library.rs b/src/backend/model/library.rs
new file mode 100644
index 0000000..33275b0
--- /dev/null
+++ b/src/backend/model/library.rs
@@ -0,0 +1,35 @@
+//! SeaORM Entity. Generated by sea-orm-codegen 0.9.1
+
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel)]
+#[sea_orm(table_name = "library")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: i32,
+    pub path: String,
+    pub filename: String,
+    pub source_id: i32,
+    pub hash: u64,
+    pub artist: Option<String>,
+    pub name: Option<String>,
+    pub album: Option<String>,
+    pub duration: u64,
+    pub genres: Option<String>,
+    pub track: Option<i32>,
+    pub year: Option<i32>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(has_many = "super::playlist_entries::Entity")]
+    PlaylistEntries,
+}
+
+impl Related<super::playlist_entries::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::PlaylistEntries.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}
diff --git a/src/backend/model/mod.rs b/src/backend/model/mod.rs
new file mode 100644
index 0000000..3d1ca4a
--- /dev/null
+++ b/src/backend/model/mod.rs
@@ -0,0 +1,7 @@
+//! SeaORM Entity. Generated by sea-orm-codegen 0.9.1
+
+pub mod prelude;
+
+pub mod library;
+pub mod playlist_entries;
+pub mod playlists;
diff --git a/src/backend/model/playlist_entries.rs b/src/backend/model/playlist_entries.rs
new file mode 100644
index 0000000..7d12974
--- /dev/null
+++ b/src/backend/model/playlist_entries.rs
@@ -0,0 +1,48 @@
+//! SeaORM Entity. Generated by sea-orm-codegen 0.9.1
+
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel)]
+#[sea_orm(table_name = "playlist_entries")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: i32,
+    pub playlist_id: i32,
+    pub song_hash: i32,
+    pub ordinal: Option<i32>,
+    pub added_date: Option<i32>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::library::Entity",
+        from = "Column::SongHash",
+        to = "super::library::Column::Hash",
+        on_update = "NoAction",
+        on_delete = "NoAction"
+    )]
+    Library,
+    #[sea_orm(
+        belongs_to = "super::playlists::Entity",
+        from = "Column::PlaylistId",
+        to = "super::playlists::Column::Id",
+        on_update = "NoAction",
+        on_delete = "NoAction"
+    )]
+    Playlists,
+}
+
+impl Related<super::library::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Library.def()
+    }
+}
+
+impl Related<super::playlists::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Playlists.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}
diff --git a/src/backend/model/playlists.rs b/src/backend/model/playlists.rs
new file mode 100644
index 0000000..0a61c6e
--- /dev/null
+++ b/src/backend/model/playlists.rs
@@ -0,0 +1,26 @@
+//! SeaORM Entity. Generated by sea-orm-codegen 0.9.1
+
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel)]
+#[sea_orm(table_name = "playlists")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: i32,
+    pub name: Option<String>,
+    pub sort_order: Option<String>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(has_many = "super::playlist_entries::Entity")]
+    PlaylistEntries,
+}
+
+impl Related<super::playlist_entries::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::PlaylistEntries.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}
diff --git a/src/backend/model/prelude.rs b/src/backend/model/prelude.rs
new file mode 100644
index 0000000..2480083
--- /dev/null
+++ b/src/backend/model/prelude.rs
@@ -0,0 +1,5 @@
+//! SeaORM Entity. Generated by sea-orm-codegen 0.9.1
+
+pub use super::library::Entity as Library;
+pub use super::playlist_entries::Entity as PlaylistEntries;
+pub use super::playlists::Entity as Playlists;
diff --git a/src/backend/playback.rs b/src/backend/playback.rs
new file mode 100644
index 0000000..e69de29
diff --git a/src/backend/utils.rs b/src/backend/utils.rs
new file mode 100644
index 0000000..0bdafbe
--- /dev/null
+++ b/src/backend/utils.rs
@@ -0,0 +1,18 @@
+use miette::{miette, Result};
+use std::path::PathBuf;
+
+pub fn config_dir() -> Option<PathBuf> {
+    dirs::config_dir().and_then(|v| Some(v.join("eleanor")))
+}
+
+#[allow(dead_code)]
+pub fn cache_dir() -> Option<PathBuf> {
+    dirs::cache_dir().and_then(|v| Some(v.join("eleanor")))
+}
+
+/// If no files have been created in the config directory, the app is running for the first time
+pub fn is_first_run() -> Result<bool> {
+    let path = config_dir().ok_or(miette!("Configuration directory not found"))?;
+
+    Ok(!path.exists())
+}
diff --git a/src/gui/mod.rs b/src/gui/mod.rs
new file mode 100644
index 0000000..e69de29
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..975e9d9
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,55 @@
+use backend::{
+    create_app_data,
+    fetching::{index_initial, index_new},
+    prepare_db,
+    utils::{config_dir, is_first_run},
+};
+use miette::{ensure, miette, IntoDiagnostic, Result};
+use paris::info;
+use sea_orm::{Database, DatabaseConnection};
+use sea_orm_migration::SchemaManager;
+
+mod backend;
+mod gui;
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    // First, make sure that the app's files exist
+    let first_run = is_first_run()?;
+    if first_run {
+        info!("No previous configuration found; Starting first run process");
+        create_app_data()?;
+    }
+
+    // Create a database connection
+    let db: DatabaseConnection = Database::connect(&format!(
+        "sqlite://{}/eleanor.db?mode=rwc",
+        config_dir()
+            .ok_or(miette!("Configuration directory not found"))?
+            .display()
+    ))
+    .await
+    .into_diagnostic()?;
+
+    // Run migrations
+    prepare_db(&db).await?;
+
+    let schema_manager = SchemaManager::new(&db);
+
+    ensure!(
+        schema_manager
+            .has_table("library")
+            .await
+            .into_diagnostic()?,
+        miette!("Running migrations failed")
+    );
+
+    if first_run {
+        index_initial(&db).await?;
+    } else {
+        // Index only new songs
+        index_new(&db).await?;
+    }
+
+    Ok(())
+}