Add changes so far

db/account.go

@@ -0,0 +1,20 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+)
+
+func GetAccountInfoFromToken(token []byte) (string, error) {
+	var username string
+	err := handle.QueryRow("SELECT username FROM accounts WHERE uuid IN (SELECT uuid FROM sessions WHERE token = ? AND expire > UTC_TIMESTAMP())").Scan(&username)
+	if err != nil {
+		if err == sql.ErrNoRows {
+			return "", fmt.Errorf("invalid token")
+		}
+
+		return "", fmt.Errorf("query failed: %s", err)
+	}
+
+	return username, nil
+}

db/db.go

@@ -0,0 +1,20 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+)
+
+var handle *sql.DB
+
+func Init(username, password, protocol, address, database string) error {
+	db, err := sql.Open("mysql", username+":"+password+"@"+protocol+"("+address+")/"+database)
+	if err != nil {
+		return fmt.Errorf("failed to open database connection: %s", err)
+	}
+
+	handle = db
+
+	return nil
+}
+