Restructure & refactor codebase

internal/glance/templates.go

@@ -0,0 +1,62 @@
+package glance
+
+import (
+	"fmt"
+	"html/template"
+	"math"
+	"strconv"
+	"time"
+
+	"golang.org/x/text/language"
+	"golang.org/x/text/message"
+)
+
+var (
+	pageTemplate        = mustParseTemplate("page.html", "document.html")
+	pageContentTemplate = mustParseTemplate("page-content.html")
+	forumPostsTemplate  = mustParseTemplate("forum-posts.html", "widget-base.html")
+)
+
+var globalTemplateFunctions = template.FuncMap{
+	"formatViewerCount": formatViewerCount,
+	"formatNumber":      intl.Sprint,
+	"absInt": func(i int) int {
+		return int(math.Abs(float64(i)))
+	},
+	"formatPrice": func(price float64) string {
+		return intl.Sprintf("%.2f", price)
+	},
+	"dynamicRelativeTimeAttrs": func(t time.Time) template.HTMLAttr {
+		return template.HTMLAttr(fmt.Sprintf(`data-dynamic-relative-time="%d"`, t.Unix()))
+	},
+}
+
+func mustParseTemplate(primary string, dependencies ...string) *template.Template {
+	t, err := template.New(primary).
+		Funcs(globalTemplateFunctions).
+		ParseFS(templateFS, append([]string{primary}, dependencies...)...)
+
+	if err != nil {
+		panic(err)
+	}
+
+	return t
+}
+
+var intl = message.NewPrinter(language.English)
+
+func formatViewerCount(count int) string {
+	if count < 1_000 {
+		return strconv.Itoa(count)
+	}
+
+	if count < 10_000 {
+		return fmt.Sprintf("%.1fk", float64(count)/1_000)
+	}
+
+	if count < 1_000_000 {
+		return fmt.Sprintf("%dk", count/1_000)
+	}
+
+	return fmt.Sprintf("%.1fm", float64(count)/1_000_000)
+}