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task.go
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task.go
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package main
import (
"database/sql"
"time"
)
type Task struct {
ID int `json:"id"`
Name string `json:"name"`
Description *string `json:"description"`
DueAt *time.Time `json:"due_at"`
IsComplete bool `json:"is_complete"`
CategoryID *int `json:"category_id"`
Category *Category `json:"category"`
}
func scanTask(rows *sql.Rows) (*Task, error) {
var t Task
var tDescription sql.NullString
var tDueAt sql.NullString
var cID sql.NullInt64
var cName sql.NullString
if err := rows.Scan(
&t.ID,
&t.Name,
&tDescription,
&tDueAt,
&t.IsComplete,
&cID,
&cName,
); err != nil {
return nil, err
}
if tDescription.Valid {
t.Description = &tDescription.String
}
if tDueAt.Valid {
parsedDate, err := time.Parse("2006-01-02 15:04:05", tDueAt.String)
if err != nil {
return nil, err
}
t.DueAt = &parsedDate
}
if cID.Valid && cName.Valid {
convertedID := int(cID.Int64)
t.CategoryID = &convertedID
t.Category = &Category{
ID: convertedID,
Name: cName.String,
}
}
return &t, nil
}
func GetTask(id int) (*Task, error) {
rows, err := DB.Query(`
SELECT
t.id as id,
t.name as name,
t.description as description,
t.due_at as due_at,
t.is_complete as is_complete,
t.category_id as category_id,
c.id as cat_id,
c.name as category_name,
FROM tasks as t
LEFT JOIN categories as c
ON c.id = t.category_id
WHERE t.id = ?
`, id)
if err != nil {
return nil, err
}
defer rows.Close()
var t *Task
if rows.Next() {
t, err = scanTask(rows)
if err != nil {
return nil, err
}
}
return t, nil
}
func GetTasks() ([]Task, error) {
rows, err := DB.Query(`
SELECT
t.id as id,
t.name as name,
t.description as description,
t.due_at as due_at,
t.is_complete as is_complete,
t.category_id as category_id,
c.name as category_name
FROM tasks as t
LEFT JOIN categories as c
ON c.id = t.category_id
ORDER BY t.id DESC
`)
if err != nil {
return nil, err
}
defer rows.Close()
tasks := []Task{}
for rows.Next() {
t, err := scanTask(rows)
if err != nil {
return nil, err
}
tasks = append(tasks, *t)
}
return tasks, nil
}
func (t *Task) Create() error {
_, err := DB.Exec(`
INSERT INTO tasks (
name,
description,
due_at,
is_complete,
category_id
) VALUES (?, ?, ?, ?, ?, ?)
`, t.Name, t.Description, t.DueAt, t.IsComplete, t.CategoryID)
return err
}
func (t *Task) Update() error {
_, err := DB.Exec(`
UPDATE tasks SET
name = ?,
description = ?,
created_at = ?,
due_at = ?,
is_complete = ?,
category_id = ?
WHERE id = ?
`, t.Name, t.Description, t.DueAt, t.IsComplete, t.CategoryID, t.ID)
return err
}
func (t *Task) Toggle() error {
t.IsComplete = !t.IsComplete
err := t.Update()
return err
}
func (t *Task) Delete() error {
_, err := DB.Exec(`DELETE FROM tasks WHERE id = ?`, t.ID)
return err
}