Let the blogger set a post's date, when writing it and afterwards

The post date is posts.created_at: it already drives ordering, the
archive, the feed and the displayed dates, so making it editable is a
form field rather than a new column. The datetime-local input degrades
to a text box on old browsers, so the server also accepts the value
typed by hand; blank keeps the current date.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Sd8UPWrvyYCLj97JexNw3A

1 files changed, 23 insertions, 2 deletions

diff --git a/internal/web/handlers_posts.go b/internal/web/handlers_posts.go
index 88d5c20..8327912 100644
--- a/internal/web/handlers_posts.go
+++ b/internal/web/handlers_posts.go
@@ -5,6 +5,7 @@ import (
 	"net/http"
 	"strconv"
 	"strings"
+	"time"
 
 	"github.com/gramanas/blogspace/internal/markdown"
 	"github.com/gramanas/blogspace/internal/slug"
@@ -46,7 +47,7 @@ func (s *Server) handlePostForm(w http.ResponseWriter, r *http.Request) {
 		s.serverError(w, err)
 		return
 	}
-	p := &store.Post{Published: true}
+	p := &store.Post{Published: true, CreatedAt: time.Now()}
 	if r.PathValue("id") != "" {
 		if p = s.loadPost(w, r); p == nil {
 			return
@@ -66,7 +67,7 @@ func (s *Server) handlePostSave(w http.ResponseWriter, r *http.Request) {
 		s.serverError(w, err)
 		return
 	}
-	p := &store.Post{}
+	p := &store.Post{CreatedAt: time.Now()}
 	if r.PathValue("id") != "" {
 		if p = s.loadPost(w, r); p == nil {
 			return
@@ -84,6 +85,13 @@ func (s *Server) handlePostSave(w http.ResponseWriter, r *http.Request) {
 	fail := func(status int, msg string) {
 		s.renderStatus(w, r, status, "dashboard/post_form.html", map[string]any{"post": p, "pages": pages, "error": msg})
 	}
+	if at := strings.TrimSpace(r.FormValue("posted_at")); at != "" { // blank keeps the current date
+		var ok bool
+		if p.CreatedAt, ok = parsePostDate(at); !ok {
+			fail(http.StatusBadRequest, s.tr(r, "Enter the date as YYYY-MM-DD HH:MM."))
+			return
+		}
+	}
 	img, err := s.readUpload(r, "inline_image")
 	if err != nil {
 		fail(http.StatusBadRequest, s.tr(r, "Image not added:")+" "+err.Error())
@@ -137,6 +145,19 @@ func (s *Server) handlePostSave(w http.ResponseWriter, r *http.Request) {
 	redirectOK(w, r, "/b/"+blog.Subdomain+"/posts/"+strconv.FormatInt(p.ID, 10)+"/edit", s.tr(r, "Saved. Refresh your blog to see it."))
 }
 
+// parsePostDate reads the post form's date: what a datetime-local input sends,
+// or the same typed by hand where the browser shows a plain text box. The time
+// of day is optional. Times are taken in the server's zone, which is also the
+// zone the blog displays them in.
+func parsePostDate(v string) (time.Time, bool) {
+	for _, layout := range []string{"2006-01-02T15:04", "2006-01-02 15:04", "2006-01-02T15:04:05", "2006-01-02"} {
+		if t, err := time.ParseInLocation(layout, v, time.Local); err == nil {
+			return t, true
+		}
+	}
+	return time.Time{}, false
+}
+
 func (s *Server) handlePostDeleteConfirm(w http.ResponseWriter, r *http.Request) {
 	p := s.loadPost(w, r)
 	if p == nil {