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Nathan Rashleigh committed 2025-09-27 09:35:26 +10:00
1 parent 690f92f565
commit f804c327de
3 files changed
+10 -288
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maple-rs/src/db.rs
-283
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@@ -1,283 +0,0 @@
use rekordcrate::pdb::Page;
use rekordcrate::util::ColorIndex;
use rekordcrate::pdb::Color;
use rekordcrate::util::RekordcrateError;
use rekordcrate::pdb::Artwork;
use rekordcrate::pdb::ArtworkId;
use rekordcrate::pdb::PageType;
use rekordcrate::pdb::PageIndex;
use std::io::Write;
use std::io::{Seek, SeekFrom};
use binrw::BinWrite;
use rekordcrate::pdb::LabelId;
use rekordcrate::pdb::KeyId;
use rekordcrate::pdb::GenreId;
use rekordcrate::pdb::ArtistId;
use rekordcrate::pdb::AlbumId;
use rekordcrate::pdb::Album;
use rekordcrate::pdb::Artist;
use rekordcrate::pdb::Genre;
use rekordcrate::pdb::Key;
use rekordcrate::pdb::Label;
use rekordcrate::pdb::Table;
use std::fs::File;
use std::path::Path;
use binrw::BinRead;
use std::collections::BTreeMap;
use binrw::Endian;
use rekordcrate::pdb::{
Header, Row,
Track, TrackId,
PlaylistTreeNode, PlaylistTreeNodeId,
PlaylistEntry,
};
#[derive(Debug)]
pub enum DbError {
UnknownPlaylist,
UnknownTrack,
PositionOutOfBounds,
}
#[derive(Debug)]
pub struct Database {
pub header: Header,
pub tracks: BTreeMap<TrackId, Track>,
pub genres: BTreeMap<GenreId, Genre>,
pub artists: BTreeMap<ArtistId, Artist>,
pub albums: BTreeMap<AlbumId, Album>,
pub labels: BTreeMap<LabelId, Label>,
pub keys: BTreeMap<KeyId, Key>,
pub colors: BTreeMap<ColorIndex, Color>,
pub playlist_tree: BTreeMap<PlaylistTreeNodeId, PlaylistTreeNode>,
// Keep playlist entries ordered by entry_index
pub playlist_entries: BTreeMap<PlaylistTreeNodeId, Vec<PlaylistEntry>>,
pub artwork: BTreeMap<ArtworkId, Artwork>,
}
const PAGE_SIZE: u16 = 4096;
impl Database {
// pub fn export(self, path: &Path) -> Result<(), RekordcrateError> {
// let table = Table::from_rows(PageType::Tracks, 1, PAGE_SIZE, self.tracks.values().cloned().map(Row::Track))?;
// println!("{:?}", table);
// Ok(())
// }
/// Iterator over (PageType, rows) in file order.
fn table_rows(&self) -> Vec<(PageType, Vec<Row>)> {
let mut playlist_rows: Vec<Row> = Vec::new();
for (_pid, mut es) in &self.playlist_entries {
let mut v = es.clone();
v.sort_by_key(|e| e.entry_index);
playlist_rows.extend(v.into_iter().map(Row::PlaylistEntry));
}
vec![
// (PageType::Tracks, self.tracks.values().cloned().map(Row::Track).collect()),
// (PageType::Genres, self.genres.values().cloned().map(Row::Genre).collect()),
// (PageType::Artists, self.artists.values().cloned().map(Row::Artist).collect()),
// (PageType::Albums, self.albums.values().cloned().map(Row::Album).collect()),
// (PageType::Labels, self.labels.values().cloned().map(Row::Label).collect()),
// (PageType::Keys, self.keys.values().cloned().map(Row::Key).collect()),
// (PageType::Colors, self.colors.values().cloned().map(Row::Color).collect()),
// (PageType::PlaylistTree, self.playlist_tree.values().cloned().map(Row::PlaylistTreeNode).collect()),
// (PageType::PlaylistEntries, playlist_rows),
// (PageType::HistoryPlaylists, Vec::new()),
// (PageType::HistoryEntries, Vec::new()),
// (PageType::Artwork, self.artwork.values().cloned().map(Row::Artwork).collect()),
// (PageType::Columns, Vec::new()),
// (PageType::History, Vec::new()),
(PageType::Tracks, vec![]),
(PageType::Genres, vec![]),
(PageType::Artists, vec![]),
(PageType::Albums, vec![]),
(PageType::Labels, vec![]),
(PageType::Keys, vec![]),
(PageType::Colors, vec![]),
(PageType::PlaylistTree, vec![]),
(PageType::PlaylistEntries, vec![]),
(PageType::HistoryPlaylists, Vec::new()),
(PageType::HistoryEntries, Vec::new()),
(PageType::Artwork, vec![]),
(PageType::Columns, Vec::new()),
(PageType::History, Vec::new()),
]
}
/// Write all tables, sequential pages, return header.tables and next_unused_page.
fn get_tables_and_pages(
&self,
start_index: u32,
page_size: u16,
) -> Result<(Vec<Table>, Vec<Page>, u32), RekordcrateError> {
let mut next = start_index;
let mut tables = Vec::new();
let mut pages = Vec::new();
for (pt, rows) in self.table_rows().into_iter() {
let (table, mut row_pages, np) = Table::from_rows(pt, next, page_size, rows)?;
pages.append(&mut row_pages);
tables.push(table);
next = np;
}
Ok((tables, pages, next))
}
pub fn export(self, path: &Path) -> Result<(), RekordcrateError> {
let mut f = File::create(path)?;
// reserve the file header space
// tables begin at 28
f.write_all(&vec![0u8; 28 as usize])?;
let (tables, pages, next_page) = self.get_tables_and_pages(1, PAGE_SIZE)?;
for table in tables.clone() {
println!("Writing table={:?} at {:?}",table, f.stream_position());
table.write_le(&mut f)?;
}
f.seek(SeekFrom::Start(4096)).unwrap();
for page in pages {
println!("Writing page={:?} at {:?}", page, f.stream_position());
page.write_le_args(&mut f, (PAGE_SIZE.into(),)).unwrap();
}
let header = Header {
sequence: 0,
next_unused_page: PageIndex(next_page),
tables,
..Default::default()
};
f.seek(SeekFrom::Start(0))?;
println!("Writing header at {:?}", f.stream_position());
header.write_le(&mut f).unwrap();
Ok(())
}
// fn write_table<I>(
// f: &mut File,
// page_type: PageType,
// start_index: u32,
// rows: I,
// ) -> std::io::Result<(u32, u32)>
// where
// I: IntoIterator<Item = Row>,
// {
// let mut page_index = start_index;
// let mut first = 0;
// let mut last = 0;
// // Pack rows into pages. Use your crate’s Page builder to handle row groups.
// let mut packer = PagePacker::new(page_type, PAGE_SIZE);
// for row in rows {
// if !packer.try_push(&row) {
// // flush full page
// let mut page = packer.finish(page_index, /*next_page=*/0);
// // Temporarily set next_page=0; we will fix it after writing the next page.
// Self::write_page(f, &mut page)?;
// if first == 0 { first = page_index; }
// last = page_index;
// page_index += 1;
// // start new page with the row that didn’t fit
// packer = PagePacker::new(page_type, PAGE_SIZE);
// assert!(packer.try_push(&row));
// }
// }
// // flush final page if it has content or if this is an empty table create one empty page
// if packer.is_empty() && first == 0 {
// let mut page = Page::empty(page_type, page_index, /*next_page=*/0, PAGE_SIZE);
// Self::write_page(f, &mut page)?;
// first = page_index;
// last = page_index;
// } else {
// let mut page = packer.finish(page_index, /*next_page=*/0);
// Self::write_page(f, &mut page)?;
// if first == 0 { first = page_index; }
// last = page_index;
// }
// // Fix `next_page` pointers by rewriting page headers if your Page writer requires it.
// // Simpler: during emission, remember the previous page file offset and seek back
// // to patch its `next_page` to `page_index`.
// Ok((first, last))
// }
// fn write_page(f: &mut File, page: &mut Page) -> std::io::Result<()> {
// page.write(f);
// Ok(())
// }
pub fn load_from_pdb(path: impl AsRef<Path>) -> rekordcrate::Result<Self> {
let mut f = std::fs::File::open(path)?;
let header = Header::read(&mut f)?; // uses the type’s endianness
let mut tracks: BTreeMap<TrackId, Track> = BTreeMap::new();
let mut albums: BTreeMap<AlbumId, Album> = BTreeMap::new();
let mut artists: BTreeMap<ArtistId, Artist> = BTreeMap::new();
let mut artwork: BTreeMap<ArtworkId, Artwork> = BTreeMap::new();
let mut colors: BTreeMap<ColorIndex, Color> = BTreeMap::new();
let mut genres: BTreeMap<GenreId, Genre> = BTreeMap::new();
let mut keys: BTreeMap<KeyId, Key> = BTreeMap::new();
let mut labels: BTreeMap<LabelId, Label> = BTreeMap::new();
let mut playlist_tree: BTreeMap<PlaylistTreeNodeId, PlaylistTreeNode> = BTreeMap::new();
let mut playlist_entries: BTreeMap<PlaylistTreeNodeId, Vec<PlaylistEntry>> = BTreeMap::new();
for table in &header.tables {
let pages = header.read_pages(&mut f, Endian::Little, (&table.first_page, &table.last_page))?;
for page in pages {
for rg in page.row_groups {
for row in rg.present_rows() {
match row {
Row::Track(t) => {
tracks.insert(t.id, t.clone());
}
Row::Artist(a) => {
artists.insert(a.id, a.clone());
}
Row::Album(a) => {
albums.insert(a.id, a.clone());
}
Row::Color(c) => {
colors.insert(c.color.clone(), c.clone());
}
Row::Genre(g) => {
genres.insert(g.id, g.clone());
}
Row::Key(k) => {
keys.insert(k.id, k.clone());
}
Row::Label(l) => {
labels.insert(l.id, l.clone());
}
Row::PlaylistTreeNode(n) => {
playlist_tree.insert(n.id, n.clone());
}
Row::PlaylistEntry(e) => {
playlist_entries.entry(e.playlist_id).or_default().push(e.clone());
}
_ => {}
}
}
}
}
}
// Ensure deterministic ordering within each playlist
for v in playlist_entries.values_mut() {
v.sort_by_key(|e| e.entry_index); // needs `pub entry_index`
}
Ok(Self { header, tracks, albums, artists, artwork, genres, keys, labels, playlist_tree, playlist_entries, colors })
}
}
maple-rs/src/main.rs
+6 -4
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@@ -1,10 +1,11 @@
mod db;
extern crate walkdir; extern crate walkdir;
use rekordcrate::util::RekordcrateError; use rekordcrate::util::RekordcrateError;
use rekordcrate::pdb::Database;
use std::fs::File;
use std::path::Path; use std::path::Path;
use db::Database;
const PAGE_SIZE: u32 = 4096;
// Example // Example
fn main() -> Result<(), RekordcrateError> { fn main() -> Result<(), RekordcrateError> {
@@ -13,7 +14,8 @@ fn main() -> Result<(), RekordcrateError> {
println!("{:?}", db.colors); println!("{:?}", db.colors);
let output = Path::new("./data/output.pdb"); let output = Path::new("./data/output.pdb");
db.export(&output).unwrap(); let mut f = File::create(output)?;
db.export(PAGE_SIZE, &mut f)?;
// let db = Database::load_from_pdb("./data/output.pdb").unwrap(); // let db = Database::load_from_pdb("./data/output.pdb").unwrap();
// println!("{:?}", db); // println!("{:?}", db);
maple.sublime-project
+4 -1
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@@ -5,7 +5,10 @@
"path": ".", "path": ".",
}, },
{ {
"path": "/home/ntr/code/rekordcrate" "path": "/home/ntr/code/rekordcrate",
},
{
"path": "/Users/nathanrashleigh/code/code/rekordcrate"
}, },
], ],
"settings": "settings":