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use crate::error::TwinHError;
use crate::models::Car;
use crate::models::Part;
use bincode::deserialize;
use constants::*;
use once_cell::sync::Lazy;
use sled::{Config, Db};
use std::env;
mod constants;
pub static DB_PATH_INSTANCE: Lazy<String> = Lazy::new(|| {
env::args()
.skip(1)
.last()
.expect("database directory not provided")
});
static REPO_INSTANCE: Lazy<Db> =
Lazy::new(
|| match Config::default().path(DB_PATH_INSTANCE.as_str()).open() {
Err(e) => panic!("failed to open database: {}", e),
Ok(db) => db,
},
);
pub fn create_demo_db() -> Result<(), TwinHError> {
let db = sled::Config::default()
.path(DB_PATH_INSTANCE.as_str())
.create_new(true)
.open()?;
let cars_tree = db.open_tree(CARS_TREE)?;
Ok(())
}
pub fn create_new_db() -> Result<(), TwinHError> {
sled::Config::default()
.path(DB_PATH_INSTANCE.as_str())
.create_new(true)
.open()?;
Ok(())
}
pub fn get_all_cars() -> Result<Vec<Car>, TwinHError> {
let cars = REPO_INSTANCE
.open_tree(CARS_TREE)?
.into_iter()
.values()
.collect::<Result<Vec<_>, _>>()?
.iter()
.map(|c| deserialize::<Car>(&c))
.collect::<Result<Vec<_>, _>>()?;
Ok(cars)
}
pub fn insert_part(part: Part) -> Result<u64, TwinHError> {
todo!()
}
#[cfg(test)]
mod tests {
use super::*;
use crate::models::{Car, Part};
use bincode::serialize;
use std::error::Error;
#[test]
fn test_insert_part() -> Result<(), Box<dyn Error>> {
let db = sled::Config::default()
.mode(sled::Mode::HighThroughput)
.temporary(true)
.open()?;
let car = Car {
key: 1,
make: "Hudson".into(),
model: "Hornet".into(),
trim: "Sedan".into(),
doors: 4,
year: 1953,
};
let tree = db.open_tree(CARS_TREE)?;
let key = car.key.to_be_bytes();
let val = serialize(&car)?;
tree.insert(key, val)?;
let part = Part {
key: 2,
number: "ABC123".into(),
name: "Rear Wheel Bearing".into(),
fits_cars: vec![car.key],
categories: Vec::new(),
sources: Vec::new(),
};
let tree = db.open_tree(PARTS_TREE)?;
let (key, val) = (serialize(&part.key)?, serialize(&part)?);
tree.insert(key.clone(), val)?;
let part_out = tree.get(key)?;
let part_out = deserialize::<Part>(&part_out.unwrap())?;
assert_eq!(part.key, part_out.key);
Ok(())
}
}
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