/
user.rs
113 lines (93 loc) · 2.68 KB
/
user.rs
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use crypto::{digest::Digest, md5::Md5};
use diesel::{
Queryable,
backend::Backend,
deserialize::{self, FromSql},
serialize::{self, ToSql},
sql_types::SmallInt,
};
use failure::format_err;
use rocket::{http::RawStr, request::FromFormValue};
use sodiumoxide::crypto::hash::sha256;
use std::{
cell::RefCell,
io::Write,
};
#[derive(Debug, Clone, Copy, PartialEq, AsExpression, Serialize, Deserialize)]
#[sql_type = "SmallInt"]
#[serde(rename_all = "lowercase")]
pub enum AvatarProvider {
Gravatar,
Libravatar,
}
impl AvatarProvider {
pub fn domain(self) -> &'static str {
match self {
AvatarProvider::Gravatar => "gravatar.com",
AvatarProvider::Libravatar => "seccdn.libravatar.org",
}
}
pub fn hash(self, s: &str) -> String {
thread_local! {
static MD5: RefCell<Md5> = RefCell::new(Md5::new());
}
match self {
AvatarProvider::Gravatar => MD5.with(|m| {
let mut m = m.borrow_mut();
m.input_str(s);
let hash = m.result_str();
m.reset();
hash
}),
AvatarProvider::Libravatar => hex::encode(&sha256::hash(s.as_bytes())[..]),
}
}
}
impl Default for AvatarProvider {
fn default() -> Self {
AvatarProvider::Gravatar
}
}
impl<DB: Backend<RawValue = [u8]>> Queryable<SmallInt, DB> for AvatarProvider {
type Row = i16;
fn build(row: Self::Row) -> Self {
match row {
0 => AvatarProvider::Gravatar,
1 => AvatarProvider::Libravatar,
_ => panic!("invalid avatar provider in database"),
}
}
}
impl<DB: Backend> ToSql<SmallInt, DB> for AvatarProvider {
fn to_sql<W: Write>(&self, out: &mut serialize::Output<W, DB>) -> serialize::Result {
let prov: i16 = match *self {
AvatarProvider::Gravatar => 0,
AvatarProvider::Libravatar => 1,
};
<i16 as ToSql<SmallInt, DB>>::to_sql(&prov, out)
}
}
impl<DB: Backend<RawValue = [u8]>> FromSql<SmallInt, DB> for AvatarProvider {
fn from_sql(bytes: Option<&DB::RawValue>) -> deserialize::Result<Self> {
let visibility = match <i16 as FromSql<SmallInt, DB>>::from_sql(bytes)? {
0 => AvatarProvider::Gravatar,
1 => AvatarProvider::Libravatar,
x => return Err(Box::new(format_err!("bad avatar provider enum: {}", x).compat())),
};
Ok(visibility)
}
}
impl FromFormValue<'v> for AvatarProvider {
type Error = &'v RawStr;
fn from_form_value(form_value: &'v RawStr) -> Result<Self, Self::Error> {
let vis = match form_value.as_str() {
"gravatar" => AvatarProvider::Gravatar,
"libravatar" => AvatarProvider::Libravatar,
_ => return Err(form_value),
};
Ok(vis)
}
fn default() -> Option<Self> {
Some(Default::default())
}
}