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use anyhow::{Result, anyhow};
use directories::BaseDirs;
use r2d2::{Pool, PooledConnection};
use r2d2_sqlite::SqliteConnectionManager;
use rusqlite::params;
use std::{
path::{Path, PathBuf},
time::UNIX_EPOCH,
};
use crate::flac::{CURRENT_VENDOR, get_vendor};
const TABLE_CREATE: &str = "CREATE TABLE IF NOT EXISTS flacs (path TEXT PRIMARY KEY UNIQUE, toencode BOOLEAN NOT NULL, modtime INTEGER)";
const ADD_NEW_ITEM: &str = "INSERT INTO flacs (path, toencode, modtime) VALUES (?1, ?2, ?3)";
const REPLACE_ITEM: &str = "REPLACE INTO flacs (path, toencode, modtime) VALUES (?1, ?2, ?3)";
const TOENCODE_QUERY: &str = "SELECT path FROM flacs WHERE toencode";
const TOENCODE_NUMBER: &str = "SELECT COUNT(*) from flacs WHERE toencode";
const CHECK_FILE: &str = "SELECT exists(SELECT 1 FROM flacs WHERE path = ?1)";
const FETCH_FILES: &str = "SELECT path FROM flacs";
const REMOVE_FILE: &str = "DELETE FROM flacs WHERE path = ?1";
const DEDUPE_DB: &str =
"DELETE FROM flacs WHERE rowid NOT IN (SELECT MAX(rowid) FROM flacs GROUP BY path)";
const GET_MODTIME: &str = "SELECT modtime FROM flacs WHERE path = ?1";
pub fn open_db(
path: Option<impl AsRef<Path>>,
threads: usize,
) -> Result<Pool<SqliteConnectionManager>> {
if let Some(file) = path {
let manager = SqliteConnectionManager::file(file);
let pool = Pool::builder().max_size(threads as u32).build(manager)?;
let conn = pool.get()?;
conn.execute(TABLE_CREATE, ())?;
Ok(pool)
} else if let Some(base_dir) = BaseDirs::new() {
let file = Path::new(base_dir.data_dir()).join("reencoder.db");
let manager = SqliteConnectionManager::file(file);
let pool = Pool::builder().max_size(threads as u32).build(manager)?;
let conn = pool.get()?;
conn.execute(TABLE_CREATE, ())?;
Ok(pool)
} else {
Err(anyhow!("Failed to locate data directory"))
}
}
pub struct Database(pub PooledConnection<SqliteConnectionManager>);
impl Database {
pub fn new(conn: PooledConnection<SqliteConnectionManager>) -> Self {
Database(conn)
}
pub fn insert_file(&self, filename: impl AsRef<Path>) -> Result<()> {
let toencode = !matches!(get_vendor(&filename)?.as_str(), CURRENT_VENDOR);
let modtime = filename
.as_ref()
.metadata()?
.modified()?
.duration_since(UNIX_EPOCH)?
.as_secs();
self.0.execute(
ADD_NEW_ITEM,
params![filename.as_ref().to_str().unwrap(), toencode, modtime],
)?;
Ok(())
}
pub fn update_file(&self, filename: impl AsRef<Path>) -> Result<()> {
let modtime = filename
.as_ref()
.metadata()?
.modified()?
.duration_since(UNIX_EPOCH)?
.as_secs();
self.0.execute(
REPLACE_ITEM,
params![filename.as_ref().to_str().unwrap(), false, modtime],
)?;
Ok(())
}
pub fn check_file(&self, filename: impl AsRef<Path>) -> Result<bool> {
if self.0.query_one(
CHECK_FILE,
params!(filename.as_ref().to_str().unwrap()),
|row| {
let num: bool = row.get(0)?;
Ok(num)
},
)? {
Ok(true)
} else {
Ok(false)
}
}
pub fn init_clean_files(&self) -> Result<Vec<PathBuf>, rusqlite::Error> {
self.0.execute(DEDUPE_DB, ())?;
let mut stmt = self.0.prepare(FETCH_FILES)?;
let mut rows = stmt.query(())?;
let mut files = Vec::new();
while let Ok(Some(row)) = rows.next() {
let path: String = row.get(0)?;
files.push(PathBuf::from(path));
}
Ok(files)
}
pub fn remove_file(&self, filename: impl AsRef<Path>) -> Result<()> {
self.0
.execute(REMOVE_FILE, params!(filename.as_ref().to_str().unwrap()))?;
Ok(())
}
pub fn get_toencode_files(&self) -> Result<Vec<PathBuf>, rusqlite::Error> {
let mut stmt = self.0.prepare(TOENCODE_QUERY)?;
let mut rows = stmt.query(())?;
let mut files: Vec<PathBuf> = Vec::new();
while let Ok(Some(row)) = rows.next() {
let path: String = row.get(0)?;
files.push(PathBuf::from(path));
}
Ok(files)
}
pub fn get_toencode_number(&self) -> Result<u64, rusqlite::Error> {
self.0.query_one(TOENCODE_NUMBER, (), |row| {
let num: u64 = row.get(0)?;
Ok(num)
})
}
pub fn get_modtime(&self, file: impl AsRef<Path>) -> Result<u64> {
Ok(self.0.query_one(
GET_MODTIME,
params![file.as_ref().to_str().unwrap()],
|row| {
let modtime: u64 = row.get(0)?;
Ok(modtime)
},
)?)
}
pub fn vaccum(&self) -> Result<()> {
self.0.execute("VACUUM", ())?;
Ok(())
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn check_localfiles() {
let dbname = String::from("temp1.db");
let filenames = ["16bit.flac", "24bit.flac", "32bit.flac"];
let mut counter = 0;
let pool = open_db(Some(&dbname), 10).unwrap();
let conn = Database::new(pool.get().unwrap());
for file in filenames {
conn.insert_file(&file.to_string()).unwrap();
}
let mut stmt = conn.0.prepare(TOENCODE_QUERY).unwrap();
let mut returned = stmt.query(()).unwrap();
while let Ok(Some(_)) = returned.next() {
counter += 1
}
std::fs::remove_file(dbname).unwrap();
assert!(counter == 0)
}
#[test]
fn check_update() {
let dbname = String::from("temp2.db");
let filenames = ["16bit.flac", "24bit.flac", "32bit.flac"];
let pool = open_db(Some(&dbname), 10).unwrap();
let conn = Database::new(pool.get().unwrap());
for file in filenames {
conn.insert_file(Path::new(file).canonicalize().unwrap())
.unwrap();
}
conn.0
.execute(
REPLACE_ITEM,
params![
Path::new("16bit.flac")
.canonicalize()
.unwrap()
.to_str()
.unwrap(),
true,
""
],
)
.unwrap();
conn.update_file(
Path::new("16bit.flac")
.canonicalize()
.unwrap()
.to_str()
.unwrap(),
)
.unwrap();
let mut stmt = conn.0.prepare(TOENCODE_QUERY).unwrap();
let mut returned = stmt.query(()).unwrap();
let mut counter = 0;
while let Ok(Some(_)) = returned.next() {
counter += 1
}
std::fs::remove_file(dbname).unwrap();
assert!(counter == 0)
}
}
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