fixed db issues

internal/db/paginate.go

@@ -1,6 +1,10 @@
 package db
 
-import "github.com/uptrace/bun"
+import (
+	"strings"
+
+	"github.com/uptrace/bun"
+)
 
 type PageOpts struct {
 	Page    int
@@ -15,7 +19,7 @@ type OrderOpts struct {
 	Label   string
 }
 
-func setDefaultPageOpts(p *PageOpts, page, perpage int, order bun.Order, orderby string) *PageOpts {
+func setPageOpts(q *bun.SelectQuery, p *PageOpts, page, perpage int, order bun.Order, orderby string) (*bun.SelectQuery, *PageOpts) {
 	if p == nil {
 		p = new(PageOpts)
 	}
@@ -31,7 +35,46 @@ func setDefaultPageOpts(p *PageOpts, page, perpage int, order bun.Order, orderby
 	if p.OrderBy == "" {
 		p.OrderBy = orderby
 	}
-	return p
+	p.OrderBy = sanitiseOrderBy(p.OrderBy)
+	q = q.OrderBy(p.OrderBy, p.Order).
+		Limit(p.PerPage).
+		Offset(p.PerPage * (p.Page - 1))
+	return q, p
+}
+
+func sanitiseOrderBy(orderby string) string {
+	result := strings.ToLower(orderby)
+	var builder strings.Builder
+	for _, r := range result {
+		if isValidChar(r) {
+			builder.WriteRune(r)
+		}
+	}
+	sanitized := builder.String()
+
+	if sanitized == "" {
+		return "_"
+	}
+
+	if !isValidFirstChar(rune(sanitized[0])) {
+		sanitized = "_" + sanitized
+	}
+
+	if len(sanitized) > 63 {
+		sanitized = sanitized[:63]
+	}
+
+	return sanitized
+}
+
+func isValidChar(r rune) bool {
+	return (r >= 'a' && r <= 'z') ||
+		(r >= '0' && r <= '9') ||
+		r == '_'
+}
+
+func isValidFirstChar(r rune) bool {
+	return (r >= 'a' && r <= 'z') || r == '_'
 }
 
 // TotalPages calculates the total number of pages