sfsdb 0.1.0

A simple, optionally cached and indexed, extensible file-system database you already know how to use
Documentation 
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use crate::filesystem::{fs_delete, fs_load, fs_save};
use serde::{Deserialize, Serialize};

use crate::error::DBError;
use crate::GenericDatabase;
use std::fs;
use std::path::{Path, PathBuf};

pub struct SimpleDB {
    location: String,
}

impl GenericDatabase for SimpleDB {
    fn location(&self) -> &str {
        &self.location
    }
    fn exists(&self, identifier: &str) -> bool {
        let mut p = PathBuf::new();
        p.push(self.location());
        p.push(identifier);
        p.exists()
    }
    fn save<T: Serialize>(&mut self, key: &str, value: &T) -> Result<(), DBError> {
        let mut path = PathBuf::new();
        path.push(&self.location());
        path.push(key);
        fs_save(&path, &value)?;
        Ok(())
    }
    fn load<T>(&mut self, key: &str) -> Result<T, DBError>
    where
        for<'de> T: Deserialize<'de>,
    {
        let mut path = PathBuf::new();
        path.push(&self.location());
        path.push(key);
        let v = fs_load::<T>(&path)?;
        Ok(v)
    }
    fn delete(&mut self, key: &str) {
        let mut path = PathBuf::new();
        path.push(&self.location());
        path.push(key);
        fs_delete(&path);
    }
}

impl SimpleDB {
    pub fn new(location: &str) -> Self {
        if !Path::new(location).exists() {
            if fs::create_dir(location).is_err() {
                panic!("sfsdb: Could not create database at {}", location)
            }
        }
        SimpleDB {
            location: String::from(location),
        }
    }
}