Make lib part do the heavy deserialization

src/core/collection/musicbrainz.rs

@@ -51,7 +51,13 @@ macro_rules! impl_imusicbrainzref {
 
         impl From<Uuid> for $mbref {
             fn from(uuid: Uuid) -> Self {
-                $mbref(MusicBrainzRef::from_uuid(uuid, $mbref::entity()))
+                $mbref(MusicBrainzRef::from_mbid(uuid, $mbref::entity()))
+            }
+        }
+
+        impl From<Mbid> for $mbref {
+            fn from(mbid: Mbid) -> Self {
+                $mbref(MusicBrainzRef::from_mbid(mbid, $mbref::entity()))
             }
         }
 
@@ -98,9 +104,9 @@ impl MusicBrainzRef {
         Ok(MusicBrainzRef { mbid, url })
     }
 
-    fn from_uuid(uuid: Uuid, entity: &'static str) -> Self {
-        let uuid_str = uuid.to_string();
-        let mbid = uuid.into();
+    fn from_mbid<ID: Into<Mbid>>(id: ID, entity: &'static str) -> Self {
+        let mbid = id.into();
+        let uuid_str = mbid.uuid().to_string();
         let url = Url::parse(&format!("https://{MB_DOMAIN}/{entity}/{uuid_str}")).unwrap();
         MusicBrainzRef { mbid, url }
     }

src/external/musicbrainz/mod.rs

@@ -2,19 +2,26 @@
 
 pub mod http;
 
-use std::fmt;
+use std::{fmt, num::ParseIntError};
 
 #[cfg(test)]
 use mockall::automock;
-use serde::{de::DeserializeOwned, Deserialize};
+use serde::{
+    de::{DeserializeOwned, Visitor},
+    Deserialize, Deserializer,
+};
 use url::form_urlencoded;
 
-use crate::core::{
+use crate::{
+    collection::album::AlbumDate,
+    core::{
         collection::{
             album::{Album, AlbumPrimaryType, AlbumSecondaryType},
             musicbrainz::IMusicBrainzRef,
         },
         interface::musicbrainz::Mbid,
+    },
+    interface::musicbrainz::MbidError,
 };
 
 #[cfg_attr(test, automock)]
@@ -74,15 +81,6 @@ impl<Http> MusicBrainzClient<Http> {
 }
 
 impl<Http: IMusicBrainzHttp> MusicBrainzClient<Http> {
-    pub fn lookup_artist_release_groups(
-        &mut self,
-        mbid: &Mbid,
-    ) -> Result<ResponseLookupArtist, Error> {
-        let mbid = mbid.uuid().as_hyphenated().to_string();
-        let url = format!("{MB_BASE_URL}/artist/{mbid}?inc=release-groups");
-        Ok(self.http.get(&url)?)
-    }
-
     pub fn search_release_group(
         &mut self,
         arid: &Mbid,
@@ -112,42 +110,100 @@ impl<Http: IMusicBrainzHttp> MusicBrainzClient<Http> {
     }
 }
 
-#[derive(Debug, Deserialize)]
-#[serde(rename_all(deserialize = "kebab-case"))]
-pub struct ResponseLookupArtist {
-    pub release_groups: Vec<LookupReleaseGroup>,
-}
-
-#[derive(Debug, Deserialize)]
-#[serde(rename_all(deserialize = "kebab-case"))]
-pub struct LookupReleaseGroup {
-    pub id: String, // TODO: Change to MBID
-    pub title: String,
-    pub first_release_date: String, // TODO: Change to AlbumDate
-    pub primary_type: SerdeAlbumPrimaryType, // TODO: Change to AlbumPrimaryType
-    pub secondary_types: Vec<SerdeAlbumSecondaryType>, // TODO: Change to Vec<AlbumSecondaryType>
-}
-
-#[derive(Clone, Debug, Deserialize)]
+#[derive(Deserialize)]
 #[serde(rename_all(deserialize = "kebab-case"))]
 pub struct ResponseSearchReleaseGroup {
     pub release_groups: Vec<SearchReleaseGroup>,
 }
 
-#[derive(Clone, Debug, Deserialize)]
+#[derive(Deserialize)]
 #[serde(rename_all(deserialize = "kebab-case"))]
 pub struct SearchReleaseGroup {
     pub score: u8,
-    pub id: String, // TODO: Change to MBID
+    pub id: Mbid,
     pub title: String,
-    pub first_release_date: String, // TODO: Change to AlbumDate
-    pub primary_type: SerdeAlbumPrimaryType, // TODO: Change to AlbumDate
-    pub secondary_types: Option<Vec<SerdeAlbumSecondaryType>>, // TODO: Change to Vec<AlbumSecondaryType>
+    pub first_release_date: AlbumDate,
+    #[serde(with = "AlbumPrimaryTypeDef")]
+    pub primary_type: AlbumPrimaryType,
+    pub secondary_types: Option<Vec<AlbumSecondaryType>>,
+}
+
+struct MbidVisitor;
+
+impl<'de> Visitor<'de> for MbidVisitor {
+    type Value = Mbid;
+
+    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        formatter.write_str("a valid MusicBrainz identifier")
+    }
+
+    fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+    where
+        E: serde::de::Error,
+    {
+        Ok(v.try_into()
+            .map_err(|e: MbidError| E::custom(e.to_string()))?)
+    }
+}
+
+impl<'de> Deserialize<'de> for Mbid {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        deserializer.deserialize_str(MbidVisitor)
+    }
+}
+
+struct AlbumDateVisitor;
+
+impl<'de> Visitor<'de> for AlbumDateVisitor {
+    type Value = AlbumDate;
+
+    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        formatter.write_str("a valid YYYY(-MM-(-DD)) date")
+    }
+
+    fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+    where
+        E: serde::de::Error,
+    {
+        let mut elems = v.split('-');
+
+        let elem = elems.next();
+        let year = elem
+            .and_then(|s| if s.is_empty() { None } else { Some(s.parse()) })
+            .transpose()
+            .map_err(|e: ParseIntError| E::custom(e.to_string()))?;
+
+        let elem = elems.next();
+        let month = elem
+            .map(|s| s.parse())
+            .transpose()
+            .map_err(|e: ParseIntError| E::custom(e.to_string()))?;
+
+        let elem = elems.next();
+        let day = elem
+            .map(|s| s.parse())
+            .transpose()
+            .map_err(|e: ParseIntError| E::custom(e.to_string()))?;
+
+        Ok(AlbumDate::new(year, month, day))
+    }
+}
+
+impl<'de> Deserialize<'de> for AlbumDate {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        deserializer.deserialize_str(AlbumDateVisitor)
+    }
 }
 
 #[derive(Debug, Deserialize)]
 #[serde(remote = "AlbumPrimaryType")]
-pub enum SerdeAlbumPrimaryTypeDef {
+pub enum AlbumPrimaryTypeDef {
     Album,
     Single,
     #[serde(rename = "EP")]
@@ -156,44 +212,47 @@ pub enum SerdeAlbumPrimaryTypeDef {
     Other,
 }
 
-#[derive(Clone, Debug, Deserialize)]
-pub struct SerdeAlbumPrimaryType(#[serde(with = "SerdeAlbumPrimaryTypeDef")] AlbumPrimaryType);
+// AlbumSecondaryType is implemented manually because deserializing to a remote type is not (yet)
+// supported for Option/Vec/Map by serde: https://github.com/serde-rs/serde/issues/723.
+struct AlbumSecondaryTypeVisitor;
 
-impl From<SerdeAlbumPrimaryType> for AlbumPrimaryType {
-    fn from(value: SerdeAlbumPrimaryType) -> Self {
-        value.0
+impl<'de> Visitor<'de> for AlbumSecondaryTypeVisitor {
+    type Value = AlbumSecondaryType;
+
+    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        formatter.write_str("a valid MusicBrainz album secondary type")
+    }
+
+    fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+    where
+        E: serde::de::Error,
+    {
+        let variant = match v {
+            "Compilation" => AlbumSecondaryType::Compilation,
+            "Soundtrack"  => AlbumSecondaryType::Soundtrack,
+            "Spokenword" => AlbumSecondaryType::Spokenword,
+            "Interview" => AlbumSecondaryType::Interview,
+            "Audiobook" => AlbumSecondaryType::Audiobook,
+            "Audio drama" => AlbumSecondaryType::AudioDrama,
+            "Live" => AlbumSecondaryType::Live,
+            "Remix" => AlbumSecondaryType::Remix,
+            "DJ-mix" => AlbumSecondaryType::DjMix,
+            "Mixtape/Street" => AlbumSecondaryType::MixtapeStreet,
+            "Demo" => AlbumSecondaryType::Demo,
+            "Field recording" => AlbumSecondaryType::FieldRecording,
+            _ => return Err(E::custom(format!("unknown album secondary type: {v}"))),
+        };
+
+        Ok(variant)
     }
 }
 
-#[derive(Debug, Deserialize)]
-#[serde(remote = "AlbumSecondaryType")]
-pub enum SerdeAlbumSecondaryTypeDef {
-    Compilation,
-    Soundtrack,
-    Spokenword,
-    Interview,
-    Audiobook,
-    #[serde(rename = "Audio drama")]
-    AudioDrama,
-    Live,
-    Remix,
-    #[serde(rename = "DJ-mix")]
-    DjMix,
-    #[serde(rename = "Mixtape/Street")]
-    MixtapeStreet,
-    Demo,
-    #[serde(rename = "Field recording")]
-    FieldRecording,
-}
-
-#[derive(Clone, Debug, Deserialize)]
-pub struct SerdeAlbumSecondaryType(
-    #[serde(with = "SerdeAlbumSecondaryTypeDef")] AlbumSecondaryType,
-);
-
-impl From<SerdeAlbumSecondaryType> for AlbumSecondaryType {
-    fn from(value: SerdeAlbumSecondaryType) -> Self {
-        value.0
+impl<'de> Deserialize<'de> for AlbumSecondaryType {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        deserializer.deserialize_str(AlbumSecondaryTypeVisitor)
     }
 }
 

src/tui/lib/external/musicbrainz/mod.rs

@@ -1,12 +1,7 @@
 //! Module for interacting with the [MusicBrainz API](https://musicbrainz.org/doc/MusicBrainz_API).
 
-use std::num;
-
 use musichoard::{
-    collection::{
-        album::{Album, AlbumDate},
-        musicbrainz::MbAlbumRef,
-    },
+    collection::album::Album,
     external::musicbrainz::{IMusicBrainzHttp, MusicBrainzClient, SearchReleaseGroup},
     interface::musicbrainz::Mbid,
 };
@@ -29,62 +24,24 @@ impl<Http: IMusicBrainzHttp> IMusicBrainz for MusicBrainz<Http> {
         arid: &Mbid,
         album: &Album,
     ) -> Result<Vec<Match<Album>>, Error> {
-        self.client
-            .search_release_group(arid, album)?
+        let mb_response = self.client.search_release_group(arid, album)?;
+        Ok(mb_response
             .release_groups
             .into_iter()
             .map(from_search_release_group)
-            .collect()
+            .collect())
     }
 }
 
-impl From<musichoard::external::musicbrainz::Error> for Error {
-    fn from(value: musichoard::external::musicbrainz::Error) -> Self {
-        match value {
-            musichoard::external::musicbrainz::Error::Http(s) => Error::Client(s),
-            musichoard::external::musicbrainz::Error::RateLimit => Error::RateLimit,
-            musichoard::external::musicbrainz::Error::Unknown(u) => Error::Unknown(u),
-        }
-    }
-}
-
-fn from_search_release_group(entity: SearchReleaseGroup) -> Result<Match<Album>, Error> {
+fn from_search_release_group(entity: SearchReleaseGroup) -> Match<Album> {
     let mut album = Album::new(
         entity.title,
-        from_mb_date(&entity.first_release_date)?,
-        Some(entity.primary_type.into()),
-        entity
-            .secondary_types
-            .map(|v| v.into_iter().map(|st| st.into()).collect())
-            .unwrap_or_default(),
+        entity.first_release_date,
+        Some(entity.primary_type),
+        entity.secondary_types.unwrap_or_default(),
     );
-    let mbref =
-        MbAlbumRef::from_uuid_str(entity.id).map_err(|err| Error::MbidParse(err.to_string()))?;
-    album.set_musicbrainz_ref(mbref);
-    Ok(Match::new(entity.score, album))
-}
-
-impl From<num::ParseIntError> for Error {
-    fn from(err: num::ParseIntError) -> Error {
-        Error::Parse(err.to_string())
-    }
-}
-
-fn from_mb_date(mb_date: &str) -> Result<AlbumDate, Error> {
-    let mut elems = mb_date.split('-');
-
-    let elem = elems.next();
-    let year = elem
-        .and_then(|s| if s.is_empty() { None } else { Some(s.parse()) })
-        .transpose()?;
-
-    let elem = elems.next();
-    let month = elem.map(|s| s.parse()).transpose()?;
-
-    let elem = elems.next();
-    let day = elem.map(|s| s.parse()).transpose()?;
-
-    Ok(AlbumDate::new(year, month, day))
+    album.set_musicbrainz_ref(entity.id.into());
+    Match::new(entity.score, album)
 }
 
 // #[cfg(test)]

src/tui/lib/interface/musicbrainz/mod.rs

@@ -1,7 +1,5 @@
 //! Module for accessing MusicBrainz metadata.
 
-use std::fmt;
-
 #[cfg(test)]
 use mockall::automock;
 
@@ -29,28 +27,4 @@ impl<T> Match<T> {
     }
 }
 
-#[derive(Debug, PartialEq, Eq)]
-pub enum Error {
-    /// Failed to parse input into an MBID.
-    MbidParse(String),
-    /// The API client failed.
-    Client(String),
-    /// The client reached the API rate limit.
-    RateLimit,
-    /// The API response could not be understood.
-    Unknown(u16),
-    /// Part of the response could not be parsed.
-    Parse(String),
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match self {
-            Error::MbidParse(s) => write!(f, "failed to parse input into an MBID: {s}"),
-            Error::Client(s) => write!(f, "the API client failed: {s}"),
-            Error::RateLimit => write!(f, "the API client reached the rate limit"),
-            Error::Unknown(u) => write!(f, "the API response could not be understood: status {u}"),
-            Error::Parse(s) => write!(f, "part of the response could not be parsed: {s}"),
-        }
-    }
-}
+pub type Error = musichoard::external::musicbrainz::Error;