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use crate::message::{Mailbox, Mailboxes}; use serde::{ de::{Deserializer, Error as DeError, MapAccess, SeqAccess, Visitor}, ser::Serializer, Deserialize, Serialize, }; use std::fmt::{Formatter, Result as FmtResult}; impl Serialize for Mailbox { fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: Serializer, { serializer.serialize_str(&self.to_string()) } } impl<'de> Deserialize<'de> for Mailbox { fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: Deserializer<'de>, { enum Field { Name, Email, } const FIELDS: &[&str] = &["name", "email"]; impl<'de> Deserialize<'de> for Field { fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: Deserializer<'de>, { struct FieldVisitor; impl<'de> Visitor<'de> for FieldVisitor { type Value = Field; fn expecting(&self, formatter: &mut Formatter<'_>) -> FmtResult { formatter.write_str("'name' or 'email'") } fn visit_str<E>(self, value: &str) -> Result<Field, E> where E: DeError, { match value { "name" => Ok(Field::Name), "email" => Ok(Field::Email), _ => Err(DeError::unknown_field(value, FIELDS)), } } } deserializer.deserialize_identifier(FieldVisitor) } } struct MailboxVisitor; impl<'de> Visitor<'de> for MailboxVisitor { type Value = Mailbox; fn expecting(&self, formatter: &mut Formatter<'_>) -> FmtResult { formatter.write_str("mailbox string or object") } fn visit_str<E>(self, s: &str) -> Result<Self::Value, E> where E: DeError, { s.parse().map_err(DeError::custom) } fn visit_map<V>(self, mut map: V) -> Result<Self::Value, V::Error> where V: MapAccess<'de>, { let mut name = None; let mut addr = None; while let Some(key) = map.next_key()? { match key { Field::Name => { if name.is_some() { return Err(DeError::duplicate_field("name")); } name = Some(map.next_value()?); } Field::Email => { if addr.is_some() { return Err(DeError::duplicate_field("email")); } addr = Some(map.next_value()?); } } } let addr = addr.ok_or_else(|| DeError::missing_field("email"))?; Ok(Mailbox::new(name, addr)) } } deserializer.deserialize_any(MailboxVisitor) } } impl Serialize for Mailboxes { fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: Serializer, { serializer.serialize_str(&self.to_string()) } } impl<'de> Deserialize<'de> for Mailboxes { fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: Deserializer<'de>, { struct MailboxesVisitor; impl<'de> Visitor<'de> for MailboxesVisitor { type Value = Mailboxes; fn expecting(&self, formatter: &mut Formatter<'_>) -> FmtResult { formatter.write_str("mailboxes string or sequence") } fn visit_str<E>(self, s: &str) -> Result<Self::Value, E> where E: DeError, { s.parse().map_err(DeError::custom) } fn visit_seq<V>(self, mut seq: V) -> Result<Self::Value, V::Error> where V: SeqAccess<'de>, { let mut mboxes = Mailboxes::new(); while let Some(mbox) = seq.next_element()? { mboxes.push(mbox); } Ok(mboxes) } } deserializer.deserialize_any(MailboxesVisitor) } } #[cfg(test)] mod test { use super::*; use crate::address::Address; use serde_json::from_str; #[test] fn parse_address_string() { let m: Address = from_str(r#""kayo@example.com""#).unwrap(); assert_eq!(m, "kayo@example.com".parse().unwrap()); } #[test] fn parse_address_object() { let m: Address = from_str(r#"{ "user": "kayo", "domain": "example.com" }"#).unwrap(); assert_eq!(m, "kayo@example.com".parse().unwrap()); } #[test] fn parse_mailbox_string() { let m: Mailbox = from_str(r#""Kai <kayo@example.com>""#).unwrap(); assert_eq!(m, "Kai <kayo@example.com>".parse().unwrap()); } #[test] fn parse_mailbox_object_address_stirng() { let m: Mailbox = from_str(r#"{ "name": "Kai", "email": "kayo@example.com" }"#).unwrap(); assert_eq!(m, "Kai <kayo@example.com>".parse().unwrap()); } #[test] fn parse_mailbox_object_address_object() { let m: Mailbox = from_str(r#"{ "name": "Kai", "email": { "user": "kayo", "domain": "example.com" } }"#) .unwrap(); assert_eq!(m, "Kai <kayo@example.com>".parse().unwrap()); } #[test] fn parse_mailboxes_string() { let m: Mailboxes = from_str(r#""yin@dtb.com, Hei <hei@dtb.com>, Kai <kayo@example.com>""#).unwrap(); assert_eq!( m, "<yin@dtb.com>, Hei <hei@dtb.com>, Kai <kayo@example.com>" .parse() .unwrap() ); } #[test] fn parse_mailboxes_array() { let m: Mailboxes = from_str(r#"["yin@dtb.com", { "name": "Hei", "email": "hei@dtb.com" }, { "name": "Kai", "email": { "user": "kayo", "domain": "example.com" } }]"#) .unwrap(); assert_eq!( m, "<yin@dtb.com>, Hei <hei@dtb.com>, Kai <kayo@example.com>" .parse() .unwrap() ); } }