Plume/src/safe_string.rs
Bat e6b8943085 New pattern for comment creation in code
Use the builder design pattern to build a NewComment

Add a function to transform a NewComment into a Create activity

Virtually send this activity to the shared inbox of the instance
2018-06-21 11:28:42 +01:00

103 lines
2.3 KiB
Rust

use ammonia::clean;
use serde::{self, Serialize, Deserialize,
Serializer, Deserializer, de::Visitor};
use std::{fmt::{self, Display},
borrow::Borrow, io::Write,
ops::Deref};
use diesel::{self, deserialize::Queryable,
types::ToSql,
sql_types::Text,
serialize::{self, Output}};
#[derive(Debug, Clone, AsExpression, FromSqlRow, Default)]
#[sql_type = "Text"]
pub struct SafeString{
value: String,
}
impl SafeString{
pub fn new(value: &str) -> Self {
SafeString{
value: clean(&value),
}
}
pub fn set(&mut self, value: &str) {
self.value = clean(value);
}
pub fn get(&self) -> &String {
&self.value
}
}
impl Serialize for SafeString {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where S: Serializer, {
serializer.serialize_str(&self.value)
}
}
struct SafeStringVisitor;
impl<'de> Visitor<'de> for SafeStringVisitor {
type Value = SafeString;
fn expecting(&self, formatter:&mut fmt::Formatter) -> fmt::Result {
formatter.write_str("a string")
}
fn visit_str<E>(self, value: &str) -> Result<SafeString, E>
where E: serde::de::Error{
Ok(SafeString::new(value))
}
}
impl<'de> Deserialize<'de> for SafeString {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where D: Deserializer<'de>, {
Ok(
deserializer.deserialize_string(SafeStringVisitor)?
)
}
}
impl Queryable<Text, diesel::pg::Pg> for SafeString {
type Row = String;
fn build(value: Self::Row) -> Self {
SafeString::new(&value)
}
}
impl<DB> ToSql<diesel::sql_types::Text, DB> for SafeString
where
DB: diesel::backend::Backend,
str: ToSql<diesel::sql_types::Text, DB>, {
fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> serialize::Result {
str::to_sql(&self.value, out)
}
}
impl Borrow<str> for SafeString {
fn borrow(&self) -> &str {
&self.value
}
}
impl Display for SafeString {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.value)
}
}
impl Deref for SafeString {
type Target = str;
fn deref(&self) -> &str {
&self.value
}
}
impl AsRef<str> for SafeString {
fn as_ref(&self) -> &str {
&self.value
}
}