feat(db): initialise sqlite support, list-db command.

src/pantry/core/sqlite.go

@@ -0,0 +1,71 @@
+package core
+
+import (
+	"database/sql"
+	"fmt"
+	"time"
+
+	_ "modernc.org/sqlite"
+)
+
+func InitDB(path string) (*sql.DB, error) {
+	db, err := sql.Open("sqlite", path)
+	if err != nil {
+		return nil, err
+	}
+
+	schema := `
+	CREATE TABLE IF NOT EXISTS inventory (
+	id INTEGER PRIMARY KEY AUTOINCREMENT,
+	name TEXT NOT NULL,
+	quantity REAL NOT NULL,
+	unit TEXT NOT NULL,
+	expiry DATE,
+	added_at DATETIME NOT NULL
+	);
+	`
+
+	_, err = db.Exec(schema)
+	if err != nil {
+		return nil, fmt.Errorf("failed to apply schema %w", err)
+	}
+
+	return db, nil
+}
+
+func ListItems(db *sql.DB) ([]InventoryItem, error) {
+	rows, err := db.Query("SELECT name, quantity, unit, expiry, added_at FROM inventory ORDER BY name")
+	if err != nil {
+		return nil, fmt.Errorf("failed to list items: %w", err)
+	}
+	defer rows.Close()
+
+	var items []InventoryItem
+
+	for rows.Next() {
+		var item InventoryItem
+		var expiry sql.NullString
+		var addedAtStr string
+
+		err = rows.Scan(&item.Name, &item.Quantity, &item.Unit, &expiry, &addedAtStr)
+		if err != nil {
+			return nil, fmt.Errorf("failed to scan row: %w", err)
+		}
+
+		if expiry.Valid {
+			parsed, err := time.Parse("2006-01-02", expiry.String)
+			if err != nil {
+				item.Expiry = &parsed
+			}
+		}
+
+		parsedTime, err := time.Parse("2006-01-02", addedAtStr)
+		if err != nil {
+			item.AddedAt = parsedTime
+		}
+
+		items = append(items, item)
+	}
+
+	return items, nil
+}

src/pantry/main.go

@@ -12,8 +12,23 @@ import (
 )
 
 func main() {
+
+	dbPath := filepath.Join(filepath.Dir(util.GetDefaultPath()), "inventory.db")
+
+	err := os.MkdirAll(filepath.Dir(dbPath), 0755)
+	if err != nil {
+		fmt.Println("Failed to create data directory:", err)
+		return
+	}
+
+	db, err := core.InitDB(dbPath)
+	if err != nil {
+		fmt.Println("Failed to initialize database:", err)
+		return
+	}
+
 	dataFile := util.GetDefaultPath()
-	err := os.MkdirAll(filepath.Dir(dataFile), 0755)
+	err = os.MkdirAll(filepath.Dir(dataFile), 0755)
 	if err != nil {
 		fmt.Println("Failed to create data directory:", err)
 		return
@@ -114,6 +129,23 @@ func main() {
 	case "list":
 		inventory.ListItems()
 
+	case "list-db":
+		items, err := core.ListItems(db)
+		if err != nil {
+			fmt.Println("Failed to list items:", err)
+			return
+		}
+
+		if len(items) == 0 {
+			fmt.Println("Pantry is empty")
+			return
+		}
+
+		fmt.Println("Your pantry:")
+		for _, item := range items {
+			fmt.Printf("- %s: %.2f %s (%s)\n", item.Name, item.Quantity, item.Unit, util.DaysUntilExpiry(item.Expiry))
+		}
+
 	default:
 		fmt.Println("Unknown command:", command)
 	}