v0.30: product pages, categories, sale prices and order status timeline

internal/handlers/home.go

@@ -7,6 +7,9 @@ import (
 	"log"
 	"net/http"
 	"regexp"
+
+	"shop/internal/models"
+	"shop/internal/orderstatus"
 )
 
 //go:embed templates/*
@@ -21,9 +24,27 @@ func stripHTML(s string) string {
 	return tagRe.ReplaceAllString(s, "")
 }
 
+func effectivePrice(p models.Product) float64 { return p.EffectivePrice() }
+
 func ParseTemplates() (*template.Template, error) {
 	funcMap := template.FuncMap{
-		"plain": stripHTML,
+		"plain":         stripHTML,
+		"effective":     effectivePrice,
+		"safeHTML":      func(s string) template.HTML { return template.HTML(s) },
+		"orderLabel":    orderstatus.Label,
+		"orderClass":    orderstatus.Class,
+		"orderStep":     orderstatus.Step,
+		"orderTimeline": func() []string { return orderstatus.Timeline },
+		"stepDone": func(status, step string) bool {
+			cur, s := orderstatus.Step(status), orderstatus.Step(step)
+			return cur > 0 && s > 0 && s < cur
+		},
+		"stepCurrent": func(status, step string) bool {
+			return orderstatus.Step(status) == orderstatus.Step(step)
+		},
+		"catSelected": func(catID int, productCatID *int) bool {
+			return productCatID != nil && *productCatID == catID
+		},
 	}
 	return template.New("").Funcs(funcMap).ParseFS(templateFS, "templates/*.html")
 }