initial vibes

2026-09-13 15:08:12 +02:00
commit 46cc687f57
24 changed files with 2754 additions and 0 deletions
@@ -0,0 +1,97 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"strings"
+
+	_ "github.com/go-sql-driver/mysql"
+	_ "modernc.org/sqlite"
+)
+
+const sqliteSchema = `
+CREATE TABLE IF NOT EXISTS lists (
+	id TEXT PRIMARY KEY,
+	created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+CREATE TABLE IF NOT EXISTS sublists (
+	id INTEGER PRIMARY KEY AUTOINCREMENT,
+	list_id TEXT NOT NULL REFERENCES lists(id),
+	name TEXT NOT NULL,
+	color TEXT NOT NULL,
+	created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+CREATE TABLE IF NOT EXISTS items (
+	id INTEGER PRIMARY KEY AUTOINCREMENT,
+	list_id TEXT NOT NULL REFERENCES lists(id),
+	name TEXT NOT NULL,
+	quantity INTEGER NOT NULL DEFAULT 1,
+	done INTEGER NOT NULL DEFAULT 0,
+	position REAL NOT NULL DEFAULT 0,
+	sublist_id INTEGER REFERENCES sublists(id),
+	created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);`
+
+const mysqlSchema = `
+CREATE TABLE IF NOT EXISTS lists (
+	id VARCHAR(64) PRIMARY KEY,
+	created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+CREATE TABLE IF NOT EXISTS sublists (
+	id INTEGER PRIMARY KEY AUTO_INCREMENT,
+	list_id VARCHAR(64) NOT NULL,
+	name VARCHAR(255) NOT NULL,
+	color VARCHAR(32) NOT NULL,
+	created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+	FOREIGN KEY (list_id) REFERENCES lists(id)
+);
+CREATE TABLE IF NOT EXISTS items (
+	id INTEGER PRIMARY KEY AUTO_INCREMENT,
+	list_id VARCHAR(64) NOT NULL,
+	name VARCHAR(255) NOT NULL,
+	quantity INTEGER NOT NULL DEFAULT 1,
+	done BOOLEAN NOT NULL DEFAULT FALSE,
+	position DOUBLE NOT NULL DEFAULT 0,
+	sublist_id INTEGER,
+	created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+	FOREIGN KEY (list_id) REFERENCES lists(id),
+	FOREIGN KEY (sublist_id) REFERENCES sublists(id)
+);`
+
+func openDB(databaseURL string) (*sql.DB, error) {
+	driver, dsn, found := strings.Cut(databaseURL, "://")
+	if !found {
+		return nil, fmt.Errorf("DATABASE_URL must be in the form driver://dsn, got %q", databaseURL)
+	}
+
+	var schema string
+	switch driver {
+	case "sqlite":
+		schema = sqliteSchema
+	case "mysql":
+		driver = "mysql"
+		schema = mysqlSchema
+	default:
+		return nil, fmt.Errorf("unsupported database driver %q, expected sqlite or mysql", driver)
+	}
+
+	db, err := sql.Open(driver, dsn)
+	if err != nil {
+		return nil, fmt.Errorf("opening database: %w", err)
+	}
+
+	if err := db.Ping(); err != nil {
+		return nil, fmt.Errorf("connecting to database: %w", err)
+	}
+
+	if _, err := db.Exec(schema); err != nil {
+		return nil, fmt.Errorf("running migration: %w", err)
+	}
+
+	// Best-effort: adds columns for databases created before they existed.
+	// Fails harmlessly if a column is already there.
+	db.Exec("ALTER TABLE items ADD COLUMN position REAL NOT NULL DEFAULT 0")
+	db.Exec("ALTER TABLE items ADD COLUMN sublist_id INTEGER")
+
+	return db, nil
+}