added seasons list

internal/db/paginate.go

@@ -0,0 +1,96 @@
+package db
+
+import "github.com/uptrace/bun"
+
+type PageOpts struct {
+	Page    int
+	PerPage int
+	Order   bun.Order
+	OrderBy string
+}
+
+type OrderOpts struct {
+	Order   bun.Order
+	OrderBy string
+	Label   string
+}
+
+// TotalPages calculates the total number of pages
+func (p *PageOpts) TotalPages(total int) int {
+	if p.PerPage == 0 {
+		return 0
+	}
+	pages := total / p.PerPage
+	if total%p.PerPage > 0 {
+		pages++
+	}
+	return pages
+}
+
+// HasPrevPage checks if there is a previous page
+func (p *PageOpts) HasPrevPage() bool {
+	return p.Page > 1
+}
+
+// HasNextPage checks if there is a next page
+func (p *PageOpts) HasNextPage(total int) bool {
+	return p.Page < p.TotalPages(total)
+}
+
+// GetPageRange returns an array of page numbers to display
+// maxButtons controls how many page buttons to show
+func (p *PageOpts) GetPageRange(total int, maxButtons int) []int {
+	totalPages := p.TotalPages(total)
+	if totalPages == 0 {
+		return []int{}
+	}
+
+	// If total pages is less than max buttons, show all pages
+	if totalPages <= maxButtons {
+		pages := make([]int, totalPages)
+		for i := 0; i < totalPages; i++ {
+			pages[i] = i + 1
+		}
+		return pages
+	}
+
+	// Calculate range around current page
+	halfButtons := maxButtons / 2
+	start := p.Page - halfButtons
+	end := p.Page + halfButtons
+
+	// Adjust if at beginning
+	if start < 1 {
+		start = 1
+		end = maxButtons
+	}
+
+	// Adjust if at end
+	if end > totalPages {
+		end = totalPages
+		start = totalPages - maxButtons + 1
+	}
+
+	pages := make([]int, 0, maxButtons)
+	for i := start; i <= end; i++ {
+		pages = append(pages, i)
+	}
+	return pages
+}
+
+// StartItem returns the number of the first item on the current page
+func (p *PageOpts) StartItem() int {
+	if p.Page < 1 {
+		return 0
+	}
+	return (p.Page-1)*p.PerPage + 1
+}
+
+// EndItem returns the number of the last item on the current page
+func (p *PageOpts) EndItem(total int) int {
+	end := p.Page * p.PerPage
+	if end > total {
+		return total
+	}
+	return end
+}