124 lines
3.5 KiB
Rust
124 lines
3.5 KiB
Rust
use std::convert::TryFrom;
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use std::fmt::{Debug, Formatter};
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use std::io::Write;
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use std::str::FromStr;
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use diesel::backend::Backend;
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use diesel::deserialize::FromSql;
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use diesel::serialize::{IsNull, Output, ToSql};
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use diesel::sql_types::Binary;
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use diesel::sqlite::Sqlite;
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use diesel::{deserialize, serialize};
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use serde::{Serialize, Serializer};
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use uuid::Uuid;
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#[derive(AsExpression, FromSqlRow, PartialEq, Clone)]
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#[sql_type = "Binary"]
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pub enum EmgauwaUid {
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Off,
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On,
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Any(Uuid),
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}
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impl EmgauwaUid {
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const OFF_STR: &'static str = "off";
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const ON_STR: &'static str = "on";
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const OFF_U8: u8 = 0;
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const ON_U8: u8 = 1;
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const OFF_U128: u128 = 0;
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const ON_U128: u128 = 1;
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}
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impl Default for EmgauwaUid {
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fn default() -> Self {
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EmgauwaUid::Any(Uuid::new_v4())
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}
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}
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impl Debug for EmgauwaUid {
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fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
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match self {
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EmgauwaUid::Off => EmgauwaUid::OFF_STR.fmt(f),
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EmgauwaUid::On => EmgauwaUid::ON_STR.fmt(f),
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EmgauwaUid::Any(value) => value.fmt(f),
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}
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}
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}
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impl ToSql<Binary, Sqlite> for EmgauwaUid {
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fn to_sql<W: Write>(&self, out: &mut Output<W, Sqlite>) -> serialize::Result {
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match self {
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EmgauwaUid::Off => out.write_all(&[EmgauwaUid::OFF_U8])?,
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EmgauwaUid::On => out.write_all(&[EmgauwaUid::ON_U8])?,
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EmgauwaUid::Any(value) => out.write_all(value.as_bytes())?,
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}
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Ok(IsNull::No)
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}
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}
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impl FromSql<Binary, Sqlite> for EmgauwaUid {
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fn from_sql(bytes: Option<&<Sqlite as Backend>::RawValue>) -> deserialize::Result<Self> {
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match bytes {
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None => Ok(EmgauwaUid::default()),
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Some(value) => match value.read_blob() {
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[EmgauwaUid::OFF_U8] => Ok(EmgauwaUid::Off),
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[EmgauwaUid::ON_U8] => Ok(EmgauwaUid::On),
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value_bytes => Ok(EmgauwaUid::Any(Uuid::from_slice(value_bytes).unwrap())),
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},
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}
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}
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}
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impl Serialize for EmgauwaUid {
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
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where
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S: Serializer,
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{
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String::from(self).serialize(serializer)
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}
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}
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impl From<Uuid> for EmgauwaUid {
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fn from(uid: Uuid) -> EmgauwaUid {
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match uid.as_u128() {
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EmgauwaUid::OFF_U128 => EmgauwaUid::Off,
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EmgauwaUid::ON_U128 => EmgauwaUid::On,
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_ => EmgauwaUid::Any(uid),
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}
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}
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}
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impl TryFrom<&str> for EmgauwaUid {
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type Error = uuid::Error;
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fn try_from(value: &str) -> Result<Self, Self::Error> {
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match value {
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EmgauwaUid::OFF_STR => Ok(EmgauwaUid::Off),
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EmgauwaUid::ON_STR => Ok(EmgauwaUid::On),
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any => match Uuid::from_str(any) {
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Ok(uuid) => Ok(EmgauwaUid::Any(uuid)),
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Err(err) => Err(err),
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},
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}
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}
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}
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impl From<&EmgauwaUid> for Uuid {
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fn from(emgauwa_uid: &EmgauwaUid) -> Uuid {
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match emgauwa_uid {
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EmgauwaUid::Off => uuid::Uuid::from_u128(EmgauwaUid::OFF_U128),
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EmgauwaUid::On => uuid::Uuid::from_u128(EmgauwaUid::ON_U128),
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EmgauwaUid::Any(value) => *value,
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}
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}
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}
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impl From<&EmgauwaUid> for String {
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fn from(emgauwa_uid: &EmgauwaUid) -> String {
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match emgauwa_uid {
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EmgauwaUid::Off => String::from(EmgauwaUid::OFF_STR),
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EmgauwaUid::On => String::from(EmgauwaUid::ON_STR),
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EmgauwaUid::Any(value) => value.to_hyphenated().to_string(),
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}
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}
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}
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