core: Add queryable meta structs

acrate-core/src/meta.rs

@@ -1,6 +1,6 @@
-use diesel::{Associations, Identifiable, Insertable, Queryable, QueryableByName, Selectable};
+use diesel::{Associations, Identifiable, Insertable, QueryResult, Queryable, QueryableByName, Selectable};
+use diesel_async::AsyncPgConnection;
 use uuid::Uuid;
-
 use super::schema;
 
 
@@ -18,7 +18,7 @@ pub struct MetaLink {
 	pub id: Uuid,
 	pub pattern: String,
 	pub rel: String,
-	pub type_: Option<String>,
+	pub r#type: Option<String>,
 	pub href: Option<String>,
 }
 
@@ -39,3 +39,61 @@ pub struct MetaProperty {
 	pub pattern: String,
 	pub value: Option<String>,
 }
+
+
+impl MetaAlias {
+	pub async fn query_matching(conn: &mut AsyncPgConnection, subject: &str) -> QueryResult<Vec<MetaAlias>>	{
+		use diesel::prelude::*;
+		use diesel_async::RunQueryDsl;
+		use schema::meta_aliases::dsl::*;
+		
+		let subject_matches_pattern = subject.into_sql::<diesel::sql_types::Text>().ilike(pattern);
+		
+		meta_aliases
+			.filter(subject_matches_pattern)
+			.select(Self::as_select())
+			.load(conn)
+			.await
+	}
+}
+
+impl MetaLink {
+	pub async fn query_matching(conn: &mut AsyncPgConnection, subject: &str) -> QueryResult<Vec<MetaLink>>	{
+		use diesel::prelude::*;
+		use diesel_async::RunQueryDsl;
+		use schema::meta_links::dsl::*;
+		
+		let subject_matches_pattern = subject.into_sql::<diesel::sql_types::Text>().ilike(pattern);
+		
+		meta_links
+			.filter(subject_matches_pattern)
+			.select(Self::as_select())
+			.load(conn)
+			.await
+	}
+	
+	pub async fn query_properties(&self, conn: &mut AsyncPgConnection) -> QueryResult<Vec<MetaLinkProperty>> {
+		use diesel::prelude::*;
+		use diesel_async::RunQueryDsl;
+		
+		MetaLinkProperty::belonging_to(self)
+			.load(conn)
+			.await
+	}
+}
+
+impl MetaProperty {
+	pub async fn query_matching(conn: &mut AsyncPgConnection, subject: &str) -> QueryResult<Vec<MetaProperty>>	{
+		use diesel::prelude::*;
+		use diesel_async::RunQueryDsl;
+		use schema::meta_properties::dsl::*;
+		
+		let subject_matches_pattern = subject.into_sql::<diesel::sql_types::Text>().ilike(pattern);
+		
+		meta_properties
+			.filter(subject_matches_pattern)
+			.select(Self::as_select())
+			.load(conn)
+			.await
+	}
+}