74 lines
1.8 KiB
Go
74 lines
1.8 KiB
Go
package tui
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import (
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"fmt"
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"image/color"
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"strings"
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"charm.land/lipgloss/v2"
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)
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// cartBlendColor mixes the colors of all cart items, weighted by quantity,
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// so the header price tints toward whatever dominates the cart.
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func (m Model) cartBlendColor() color.Color {
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var rSum, gSum, bSum, n int
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for _, item := range m.Cart {
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r, g, b, ok := parseHexColor(item.Coffee.Color)
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if !ok {
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continue
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}
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rSum += r * item.Quantity
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gSum += g * item.Quantity
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bSum += b * item.Quantity
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n += item.Quantity
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}
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if n == 0 {
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return cWhite
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}
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return lipgloss.Color(fmt.Sprintf("#%02X%02X%02X", rSum/n, gSum/n, bSum/n))
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}
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// BuildHeader renders the top chrome bar: brand, tab pills, and cart summary.
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// Layout ported from the design prototype at ~/programming/test/shop.go.
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func (m Model) BuildHeader() string {
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_, _, _, wideW := m.shopLayout()
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brand := pWht.Bold(true).Render("terminal")
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pill := lipgloss.NewStyle().Background(cPill).Foreground(cWhite).Bold(true).Padding(0, 1)
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tab := func(key, label string, active bool) string {
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if active {
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return pill.Render(label)
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}
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return pDim.Render(key+" ") + pBody.Render(label)
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}
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var left string
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if m.size == small {
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left = brand
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} else {
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left = strings.Join([]string{
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brand,
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tab("s", "shop", m.currentPage == shopPage),
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tab("a", "account", m.currentPage == accountPage),
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}, " ")
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}
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cartLabel := pDim.Render("cart ")
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if m.inCartFlow() {
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cartLabel = pWht.Bold(true).Render("cart ")
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}
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cart := cartLabel +
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lipgloss.NewStyle().Foreground(m.cartBlendColor()).Bold(true).
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Render(fmt.Sprintf("$%d", m.CalculateSubtotal()/100)) +
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pDim.Render(fmt.Sprintf(" · %d", m.CartItemCount()))
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gap := wideW - lipgloss.Width(left) - lipgloss.Width(cart)
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if gap < 1 {
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gap = 1
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}
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row := left + strings.Repeat(" ", gap) + cart
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return panel(wideW, 0, row)
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}
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