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#[cfg(feature = "mysql")]
extern crate dotenv;
use std::collections::HashMap;
#[cfg(feature = "mysql")]
use diesel::prelude::*;
#[cfg(feature = "mysql")]
use diesel::mysql::MysqlConnection;
#[cfg(feature = "mysql")]
use r2d2::Pool;
#[cfg(feature = "mysql")]
use r2d2_diesel::ConnectionManager;
use chrono::NaiveDateTime;
pub enum DbResponse {
Success,
Failed(&'static str),
}
#[cfg_attr(feature = "mysql", derive(Queryable))]
#[derive(Clone, Debug)]
pub struct Factoid {
pub name: String,
pub idx: i32,
pub content: String,
pub author: String,
pub created: NaiveDateTime,
}
#[cfg(feature = "mysql")]
use self::mysql::factoids;
#[cfg_attr(feature = "mysql", derive(Insertable))]
#[cfg_attr(feature = "mysql", table_name = "factoids")]
pub struct NewFactoid<'a> {
pub name: &'a str,
pub idx: i32,
pub content: &'a str,
pub author: &'a str,
pub created: NaiveDateTime,
}
pub trait Database: Send {
fn insert_factoid(&mut self, factoid: &NewFactoid) -> DbResponse;
fn get_factoid(&self, name: &str, idx: i32) -> Option<Factoid>;
fn delete_factoid(&mut self, name: &str, idx: i32) -> DbResponse;
fn count_factoids(&self, name: &str) -> Result<i32, &'static str>;
}
// HashMap
impl Database for HashMap<(String, i32), Factoid> {
fn insert_factoid(&mut self, factoid: &NewFactoid) -> DbResponse {
let factoid = Factoid {
name: String::from(factoid.name),
idx: factoid.idx,
content: factoid.content.to_string(),
author: factoid.author.to_string(),
created: factoid.created,
};
let name = factoid.name.clone();
match self.insert((name, factoid.idx), factoid) {
None => DbResponse::Success,
Some(_) => DbResponse::Failed("Factoid was overwritten"),
}
}
fn get_factoid(&self, name: &str, idx: i32) -> Option<Factoid> {
self.get(&(String::from(name), idx)).cloned()
}
fn delete_factoid(&mut self, name: &str, idx: i32) -> DbResponse {
match self.remove(&(String::from(name), idx)) {
Some(_) => DbResponse::Success,
None => DbResponse::Failed("Factoid not found"),
}
}
fn count_factoids(&self, name: &str) -> Result<i32, &'static str> {
Ok(self.iter().filter(|&(&(ref n, _), _)| n == name).count() as i32)
}
}
// Diesel automatically define the factoids module as public.
// For now this is how we keep it private.
#[cfg(feature = "mysql")]
mod mysql {
table! {
factoids (name, idx) {
name -> Varchar,
idx -> Integer,
content -> Text,
author -> Varchar,
created -> Timestamp,
}
}
}
#[cfg(feature = "mysql")]
impl Database for Pool<ConnectionManager<MysqlConnection>> {
fn insert_factoid(&mut self, factoid: &NewFactoid) -> DbResponse {
use diesel;
let conn = &*self.get().expect("Failed to get connection");
match diesel::insert_into(factoids::table)
.values(factoid)
.execute(conn)
{
Ok(_) => DbResponse::Success,
Err(e) => {
error!("DB Insertion Error: {}", e);
DbResponse::Failed("Failed to add factoid")
}
}
}
fn get_factoid(&self, name: &str, idx: i32) -> Option<Factoid> {
let conn = &*self.get().expect("Failed to get connection");
match factoids::table.find((name, idx)).first(conn) {
Ok(f) => Some(f),
Err(e) => {
error!("DB Count Error: {}", e);
None
}
}
}
fn delete_factoid(&mut self, name: &str, idx: i32) -> DbResponse {
use diesel;
use self::factoids::columns;
let conn = &*self.get().expect("Failed to get connection");
match diesel::delete(
factoids::table
.filter(columns::name.eq(name))
.filter(columns::idx.eq(idx)),
).execute(conn)
{
Ok(v) => {
if v > 0 {
DbResponse::Success
} else {
DbResponse::Failed("Could not find any factoid with that name")
}
}
Err(e) => {
error!("DB Deletion Error: {}", e);
DbResponse::Failed("Failed to delete factoid")
}
}
}
fn count_factoids(&self, name: &str) -> Result<i32, &'static str> {
use diesel;
let conn = &*self.get().expect("Failed to get connection");
let count: Result<i64, _> = factoids::table
.filter(factoids::columns::name.eq(name))
.count()
.get_result(conn);
match count {
Ok(c) => Ok(c as i32),
Err(diesel::NotFound) => Ok(0),
Err(e) => {
error!("DB Count Error: {}", e);
Err("Database Error")
}
}
}
}
|
