show category route

server.js

@@ -43,5 +43,55 @@ app.get('/status', async (req, res)=>{
 	})
 })
 
+app.get('/show-category/:id', async (req, res) => {
+
+	const query = `SELECT
+			practice_sessions.id,
+			practice_sessions.description,
+			seconds,
+			songs.id AS song_id,
+			songs.title,
+			comments,
+			created_at,
+			practice_categories.name AS category,
+			instruments.name AS instrument
+		 FROM practice_sessions
+			JOIN practice_categories ON practice_category_id = practice_categories.id
+			JOIN instruments ON instrument_id = instruments.id
+			LEFT JOIN songs_practiced ON practice_sessions.id = songs_practiced.practice_session_id
+			LEFT JOIN songs ON songs_practiced.song_id = songs.id
+		 WHERE practice_category_id = ?
+		 ORDER BY practice_sessions.id DESC`;
+
+	const results = await mysqlConnection.awaitQuery(query, [req.params.id])
+
+	const entries = [];
+	let previousSessionId = 0;
+
+	results.forEach(row => {
+		if (row.id !== previousSessionId) {
+			entries.push({
+				id:row.id,
+				description:row.description,
+				seconds:row.seconds,
+				comments:row.comments,
+				created_at:row.created_at,
+				category:row.category,
+				instrument:row.instrument,
+				songs:[]
+			})
+			previousSessionId = row.id
+		}
+		if (row.song_id !== null) {
+			entries[entries.length-1].songs.push({
+				id: row.song_id,
+				title: row.title
+			});
+		}
+
+	});
+
+	res.json(entries);
+});
 
 app.listen(18080)