add delete quote method

backend/handlers.go

@@ -1,4 +1,4 @@
-// TODO: READ AND UNDERSTAND + ALTER
+// TODO: READ AND UNDERSTAND
 
 package main
 
@@ -10,7 +10,7 @@ import (
 
 // GET /quotes
 func getQuotes(w http.ResponseWriter, r *http.Request) {
-	rows, err := db.Query(context.Background(), "SELECT * FROM hlaskovnik")
+	rows, err := db.Query(context.Background(), "SELECT * FROM hlaskovnik;")
 	if err != nil {
 		http.Error(w, err.Error(), 500)
 		return
@@ -41,7 +41,7 @@ func createQuote(w http.ResponseWriter, r *http.Request) {
 
 	err = db.QueryRow(
 		context.Background(),
-		"INSERT INTO hlaskovnik(author, body) VALUES($1, $2) RETURNING id",
+		"INSERT INTO hlaskovnik(author, body) VALUES($1, $2) RETURNING id;",
 		q.Author, q.Body,
 	).Scan(&q.Id)
 
@@ -53,3 +53,19 @@ func createQuote(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "application/json")
 	json.NewEncoder(w).Encode(q)
 }
+
+// DELETE /quotes
+func deleteQuote(w http.ResponseWriter, r *http.Request) {
+	var q Quote
+	err := json.NewDecoder(r.Body).Decode(&q)
+	if err != nil {
+		http.Error(w, "Invalid JSON", 400)
+		return
+	}
+
+	err = db.QueryRow(
+		context.Background(),
+		"DELETE FROM hlaskovnik WHERE id = $1 RETURNING *;",
+		q.Id,
+	).Scan(&q.Id)
+}