From 990b29b3c8c5a0ccc4d188ab62b43f59b505e68d Mon Sep 17 00:00:00 2001
From: "Gustavo \"Guz\" L de Mello" <contact@guz.one>
Date: Fri, 11 Apr 2025 22:04:44 -0300
Subject: [PATCH] feat: dynamic last updated date in privacy policy

---
 app.go                 | 34 +++++++++++++++++++++++++++++++---
 go.mod                 |  1 +
 go.sum                 |  2 ++
 templates/privacy.html |  9 +++++++++
 4 files changed, 43 insertions(+), 3 deletions(-)

diff --git a/app.go b/app.go
index fc48fa2..4fa1cd0 100644
--- a/app.go
+++ b/app.go
@@ -12,6 +12,7 @@ import (
 	"slices"
 	"sort"
 	"strings"
+	"time"
 
 	"capytal.cc/assets"
 	"capytal.cc/internals/natsort"
@@ -25,6 +26,7 @@ import (
 	"forge.capytal.company/loreddev/x/smalltrip/exception"
 	"forge.capytal.company/loreddev/x/smalltrip/middleware"
 	links "github.com/fundipper/goldmark-links"
+	"github.com/goodsign/monday"
 	"github.com/yuin/goldmark"
 	highlighting "github.com/yuin/goldmark-highlighting/v2"
 	meta "github.com/yuin/goldmark-meta"
@@ -196,6 +198,20 @@ func (app *app) setup() {
 			}
 		}
 
+		changeDate, err := time.Parse(time.DateOnly, "2025-04-11")
+		app.assert.Nil(err, "This date should always be valid")
+
+		if d, ok := meta["modified"]; ok {
+			if s, ok := d.(string); ok {
+				t, err := time.Parse(time.RFC3339, s)
+				if err != nil {
+					exception.InternalServerError(err).ServeHTTP(w, r)
+					return
+				}
+				changeDate = t
+			}
+		}
+
 		f := new(strings.Builder)
 		err = md.Renderer().Render(f, c, doc)
 		if err != nil {
@@ -203,10 +219,22 @@ func (app *app) setup() {
 			return
 		}
 
+		locale := r.URL.Query().Get("lang")
+		if locale == "" {
+			locale = "en-US"
+		}
+		locale = strings.Replace(locale, "-", "_", 1)
+
+		format, ok := monday.LongFormatsByLocale[monday.Locale(locale)]
+		if !ok {
+			format = time.DateTime
+		}
+
 		err = app.templates.ExecuteTemplate(w, "privacy-policy", map[string]any{
-			"Title":   title,
-			"Lang":    r.URL.Query().Get("lang"),
-			"Content": template.HTML(f.String()),
+			"Title":      title,
+			"Lang":       r.URL.Query().Get("lang"),
+			"Content":    template.HTML(f.String()),
+			"ChangeDate": monday.Format(changeDate, format, monday.Locale(locale)),
 		})
 		if err != nil {
 			exception.InternalServerError(err).ServeHTTP(w, r)
diff --git a/go.mod b/go.mod
index 573f95c..0adb4a1 100644
--- a/go.mod
+++ b/go.mod
@@ -5,6 +5,7 @@ go 1.24.1
 require (
 	forge.capytal.company/loreddev/x v0.0.0-20250311222825-ceda7536f16e
 	github.com/fundipper/goldmark-links v0.1.0
+	github.com/goodsign/monday v1.0.2
 	github.com/yuin/goldmark-highlighting/v2 v2.0.0-20230729083705-37449abec8cc
 	gitlab.com/staticnoise/goldmark-callout v0.0.0-20240609120641-6366b799e4ab
 	go.abhg.dev/goldmark/anchor v0.2.0
diff --git a/go.sum b/go.sum
index e299e03..3f2ae95 100644
--- a/go.sum
+++ b/go.sum
@@ -14,6 +14,8 @@ github.com/dlclark/regexp2 v1.7.0 h1:7lJfhqlPssTb1WQx4yvTHN0uElPEv52sbaECrAQxjAo
 github.com/dlclark/regexp2 v1.7.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
 github.com/fundipper/goldmark-links v0.1.0 h1:T8k1+Utk/zirAgasOInXAaIEnOjtGkZQAWe69qYuhag=
 github.com/fundipper/goldmark-links v0.1.0/go.mod h1:e+zrEj9H4lRpN96WDuT6Uk3CjFDRJJi4isKMYbUzvBI=
+github.com/goodsign/monday v1.0.2 h1:k8kRMkCRVfCTWOU4dRfRgneQsWlB1+mJd3MxG0lGLzQ=
+github.com/goodsign/monday v1.0.2/go.mod h1:r4T4breXpoFwspQNM+u2sLxJb2zyTaxVGqUfTBjWOu8=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
diff --git a/templates/privacy.html b/templates/privacy.html
index d1de9f6..ed4a220 100644
--- a/templates/privacy.html
+++ b/templates/privacy.html
@@ -8,6 +8,15 @@
 	</header>
 	<main class="mx-10 md:text-justify md:mx-auto md:w-[80%]">
 		{{.Content}}
+		<hr>
+		<p>
+			{{if (eq .Lang "pt-BR")}}
+			Última atualização:
+			{{else}}
+			Latest update:
+			{{end}}
+			{{.ChangeDate}}
+		</p>
 	</main>
 	{{template "nav-bar" (args "Lang" .Lang)}}
 	{{template "footer" (args "Lang" .Lang)}}