more refactors

internal/db/paginate.go

@@ -19,21 +19,25 @@ type OrderOpts struct {
 	Label   string
 }
 
-func setPageOpts(q *bun.SelectQuery, p *PageOpts, page, perpage int, order bun.Order, orderby string) (*bun.SelectQuery, *PageOpts) {
+func setPageOpts(q *bun.SelectQuery, p, d *PageOpts, totalitems int) (*bun.SelectQuery, *PageOpts) {
 	if p == nil {
 		p = new(PageOpts)
 	}
-	if p.Page == 0 {
-		p.Page = page
+	if p.Page <= 0 {
+		p.Page = d.Page
 	}
 	if p.PerPage == 0 {
-		p.PerPage = perpage
+		p.PerPage = d.PerPage
+	}
+	maxpage := p.TotalPages(totalitems)
+	if p.Page > maxpage {
+		p.Page = maxpage
 	}
 	if p.Order == "" {
-		p.Order = order
+		p.Order = d.Order
 	}
 	if p.OrderBy == "" {
-		p.OrderBy = orderby
+		p.OrderBy = d.OrderBy
 	}
 	p.OrderBy = sanitiseOrderBy(p.OrderBy)
 	q = q.OrderBy(p.OrderBy, p.Order).