Update Artist
===

const { submitQuery, sql, sqlReduce } = require("~root/lib/database");
 
const updateArtistById = ({ artistId, genre = null, name = null }) => {
 const updates = [];
 
 if (genre !== null) {
   updates.push(sql`genre = ${genre}`);
 }
 
 if (name !== null) {
   updates.push(sql`name = ${name}`);
 }
 
 if (updates.length !== 0) {
   return submitQuery`
   UPDATE
     Artists
   SET
     ${updates.reduce(sqlReduce)}
   WHERE
     artist_id = ${artistId};
 `;
 }
 return Promise.resolve();
};
 
module.exports = updateArtistById;