core: Support meta titles

acrate-core/src/meta.rs

@@ -22,6 +22,7 @@ pub struct MetaLink {
 	pub rel: String,
 	pub type_: Option<String>,
 	pub href: Option<String>,
+	pub template: Option<String>,
 }
 
 #[derive(Debug, Queryable, QueryableByName, Identifiable, Selectable, Insertable, Associations)]
@@ -34,6 +35,16 @@ pub struct MetaLinkProperty {
 	pub value: Option<String>,
 }
 
+#[derive(Debug, Queryable, QueryableByName, Identifiable, Selectable, Insertable, Associations)]
+#[diesel(belongs_to(MetaLink))]
+#[diesel(table_name = schema::meta_link_titles)]
+pub struct MetaLinkTitle {
+	pub id: Uuid,
+	pub meta_link_id: Uuid,
+	pub language: String,
+	pub value: String,
+}
+
 #[derive(Debug, Queryable, QueryableByName, Identifiable, Selectable, Insertable)]
 #[diesel(table_name = schema::meta_properties)]
 pub struct MetaProperty {
@@ -44,7 +55,6 @@ pub struct MetaProperty {
 	pub value: Option<String>,
 }
 
-
 impl MetaAlias {
 	pub async fn query_matching(conn: &mut AsyncPgConnection, doc: &str, subject: &str) -> QueryResult<Vec<MetaAlias>>	{
 		use diesel::prelude::*;
@@ -88,6 +98,15 @@ impl MetaLink {
 			.load(conn)
 			.await
 	}
+	
+	pub async fn query_titles(&self, conn: &mut AsyncPgConnection) -> QueryResult<Vec<MetaLinkTitle>> {
+		use diesel::prelude::*;
+		use diesel_async::RunQueryDsl;
+		
+		MetaLinkTitle::belonging_to(self)
+			.load(conn)
+			.await
+	}
 }
 
 impl MetaProperty {