Add RSS/Sitemap handling.

server/utils/site_map.go

@@ -0,0 +1,39 @@
+package utils
+
+import (
+	"fmt"
+	"github.com/gofiber/fiber/v3/log"
+	"nysoure/server/model"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+const (
+	SiteMapFileName = "sitemap.xml"
+)
+
+func GenerateSiteMap(baseURL string, resources []model.Resource) {
+	path := filepath.Join(GetStoragePath(), SiteMapFileName)
+	builder := strings.Builder{}
+	builder.WriteString(`<?xml version="1.0" encoding="UTF-8"?>`)
+	builder.WriteRune('\n')
+	builder.WriteString(`<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">`)
+	builder.WriteRune('\n')
+	for _, resource := range resources {
+		builder.WriteString("  <url>\n")
+		builder.WriteString("    <loc>")
+		builder.WriteString(fmt.Sprintf("%s/resources/%d", baseURL, resource.ID))
+		builder.WriteString("</loc>\n")
+		builder.WriteString("    <lastmod>")
+		builder.WriteString(resource.UpdatedAt.Format("2006-01-02"))
+		builder.WriteString("</lastmod>\n")
+		builder.WriteString("  </url>\n")
+	}
+	builder.WriteString(`</urlset>`)
+	builder.WriteRune('\n')
+	data := builder.String()
+	if err := os.WriteFile(path, []byte(data), 0644); err != nil {
+		log.Error("failed to write site map file", err)
+	}
+}