refactor: remove pocketbase (#1138)

app/database/paginate.go

@@ -0,0 +1,52 @@
+package database
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+)
+
+func Paginate(ctx context.Context, f func(ctx context.Context, offset, limit int64) (nextPage bool, err error)) error {
+	const pageSize int64 = 100
+
+	for i := range int64(1000) {
+		nextPage, err := f(ctx, i*pageSize, pageSize)
+		if err != nil {
+			if errors.Is(err, sql.ErrNoRows) {
+				// No more features to process, exit the loop
+				return nil
+			}
+
+			return err
+		}
+
+		if !nextPage {
+			return nil
+		}
+	}
+
+	return errors.New("pagination limit reached, too many pages")
+}
+
+func PaginateItems[T any](ctx context.Context, f func(ctx context.Context, offset, limit int64) (items []T, err error)) ([]T, error) {
+	var allItems []T
+
+	if err := Paginate(ctx, func(ctx context.Context, offset, limit int64) (nextPage bool, err error) {
+		items, err := f(ctx, offset, limit)
+		if err != nil {
+			return false, err
+		}
+
+		if len(items) == 0 {
+			return false, nil
+		}
+
+		allItems = append(allItems, items...)
+
+		return true, nil
+	}); err != nil {
+		return nil, err
+	}
+
+	return allItems, nil
+}