Add endpoint to create allowance (#34)

Closes #11

Reviewed-on: #34

backend/db.go

@@ -3,6 +3,7 @@ package main
 import (
 	"errors"
 	"log"
+	"time"
 
 	"gitea.seeseepuff.be/seeseemelk/mysqlite"
 )
@@ -45,11 +46,11 @@ func (db *Db) GetUsers() ([]User, error) {
 	return users, nil
 }
 
-func (db *Db) GetUser(id int) (*User, error) {
-	user := &User{}
+func (db *Db) GetUser(id int) (*UserWithAllowance, error) {
+	user := &UserWithAllowance{}
 
-	err := db.db.Query("select id, name from users where id = ?").
-		Bind(id).ScanSingle(&user.ID, &user.Name)
+	err := db.db.Query("select u.id, u.name, sum(h.amount) from users u join history h on h.user_id = u.id where u.id = ?").
+		Bind(id).ScanSingle(&user.ID, &user.Name, &user.Allowance)
 	if errors.Is(err, mysqlite.ErrNoRows) {
 		return nil, nil
 	}
@@ -237,3 +238,19 @@ func (db *Db) UpdateTask(id int, task *CreateTaskRequest) error {
 	}
 	return tx.Commit()
 }
+
+func (db *Db) AddAllowance(userId int, allowance *PostAllowance) error {
+	tx, err := db.db.Begin()
+	if err != nil {
+		return err
+	}
+	defer tx.MustRollback()
+
+	err = tx.Query("insert into history (user_id, date, amount) values (?, ?, ?)").
+		Bind(userId, time.Now().Unix(), allowance.Allowance).
+		Exec()
+	if err != nil {
+		return err
+	}
+	return tx.Commit()
+}