Enable customizing Reader page

This makes it possible to edit the title and introductory text at the
top of the Reader view.

Ref T684

admin.go

@@ -319,6 +319,8 @@ func handleViewAdminPage(app *App, u *User, w http.ResponseWriter, r *http.Reque
 		}
 		p.Content, err = getLandingBody(app)
 		p.Content.ID = "landing"
+	} else if slug == "reader" {
+		p.Content, err = getReaderSection(app)
 	} else {
 		p.Content, err = app.db.GetDynamicContent(slug)
 	}
@@ -342,7 +344,7 @@ func handleAdminUpdateSite(app *App, u *User, w http.ResponseWriter, r *http.Req
 	id := vars["page"]
 
 	// Validate
-	if id != "about" && id != "privacy" && id != "landing" {
+	if id != "about" && id != "privacy" && id != "landing" && id != "reader" {
 		return impart.HTTPError{http.StatusNotFound, "No such page."}
 	}
 
@@ -356,6 +358,9 @@ func handleAdminUpdateSite(app *App, u *User, w http.ResponseWriter, r *http.Req
 			return impart.HTTPError{http.StatusFound, "/admin/page/" + id + m}
 		}
 		err = app.db.UpdateDynamicContent("landing-body", "", r.FormValue("content"), "section")
+	} else if id == "reader" {
+		// Update sections with titles
+		err = app.db.UpdateDynamicContent(id, r.FormValue("title"), r.FormValue("content"), "section")
 	} else {
 		// Update page
 		err = app.db.UpdateDynamicContent(id, r.FormValue("title"), r.FormValue("content"), "page")

pages.go

@@ -135,3 +135,30 @@ WriteFreely can communicate with other federated platforms like Mastodon, so peo
 	}
 	return ""
 }
+
+func getReaderSection(app *App) (*instanceContent, error) {
+	c, err := app.db.GetDynamicContent("reader")
+	if err != nil {
+		return nil, err
+	}
+	if c == nil {
+		c = &instanceContent{
+			ID:      "reader",
+			Type:    "section",
+			Content: defaultReaderBanner(app.cfg),
+			Updated: defaultPageUpdatedTime,
+		}
+	}
+	if !c.Title.Valid {
+		c.Title = defaultReaderTitle(app.cfg)
+	}
+	return c, nil
+}
+
+func defaultReaderTitle(cfg *config.Config) sql.NullString {
+	return sql.NullString{String: "Reader", Valid: true}
+}
+
+func defaultReaderBanner(cfg *config.Config) string {
+	return "Read the latest posts from " + cfg.App.SiteName + "."
+}

read.go

@@ -50,6 +50,10 @@ type readPublication struct {
 	SelTopic    string
 	IsAdmin     bool
 	CanInvite   bool
+
+	// Customizable page content
+	ContentTitle string
+	Content      template.HTML
 }
 
 func initLocalTimeline(app *App) {
@@ -211,8 +215,14 @@ func showLocalTimeline(app *App, w http.ResponseWriter, r *http.Request, page in
 		d.IsAdmin = u != nil && u.IsAdmin()
 		d.CanInvite = canUserInvite(app.cfg, d.IsAdmin)
 	}
+	c, err := getReaderSection(app)
+	if err != nil {
+		return err
+	}
+	d.ContentTitle = c.Title.String
+	d.Content = template.HTML(applyMarkdown([]byte(c.Content), "", app.cfg))
 
-	err := templates["read"].ExecuteTemplate(w, "base", d)
+	err = templates["read"].ExecuteTemplate(w, "base", d)
 	if err != nil {
 		log.Error("Unable to render reader: %v", err)
 		fmt.Fprintf(w, ":(")

templates/read.tmpl

@@ -80,8 +80,8 @@
 {{define "body-attrs"}}id="collection"{{end}}
 {{define "content"}}
 	<div class="content-container snug" style="max-width: 40rem;">
-		<h1 style="text-align:center">Reader</h1>
+		<h1>{{.ContentTitle}}</h1>
-		<p{{if .SelTopic}} style="text-align:center"{{end}}>{{if .SelTopic}}#{{.SelTopic}} posts{{else}}Read the latest posts from {{.SiteName}}. {{if .Username}}To showcase your writing here, go to your <a href="/me/c/">blog</a> settings and select the <em>Public</em> option.{{end}}{{end}}</p>
+		<p{{if .SelTopic}} style="text-align:center"{{end}}>{{if .SelTopic}}#{{.SelTopic}} posts{{else}}{{.Content}}{{end}}</p>
 	</div>
 		<div id="wrapper">
 		{{ if gt (len .Posts) 0 }}

templates/user/admin/pages.tmpl

@@ -20,6 +20,9 @@ table.classy.export .disabled, table.classy.export a {
 		<tr>
 			<td colspan="2"><a href="/admin/page/landing">Home</a></td>
 		</tr>
+		{{if .LocalTimeline}}<tr>
+			<td colspan="2"><a href="/admin/page/reader">Reader</a></td>
+		</tr>{{end}}
 		{{range .Pages}}
 		<tr>
 			<td><a href="/admin/page/{{.ID}}">{{if .Title.Valid}}{{.Title.String}}{{else}}{{.ID}}{{end}}</a></td>

templates/user/admin/view-page.tmpl

@@ -31,6 +31,8 @@ input[type=text] {
 	<p class="page-desc content-desc">Describe what your instance is <a href="/about" target="page">about</a>.</p>
 	{{else if eq .Content.ID "privacy"}}
 	<p class="page-desc content-desc">Outline your <a href="/privacy" target="page">privacy policy</a>.</p>
+	{{else if eq .Content.ID "reader"}}
+	<p class="page-desc content-desc">Customize your <a href="/read" target="page">Reader</a> page.</p>
 	{{else if eq .Content.ID "landing"}}
 	<p class="page-desc content-desc">Customize your <a href="/?landing=1" target="page">home page</a>.</p>
 	{{end}}
@@ -38,7 +40,7 @@ input[type=text] {
 	{{if .Message}}<p>{{.Message}}</p>{{end}}
 
 	<form method="post" action="/admin/update/{{.Content.ID}}" onsubmit="savePage(this)">
-		{{if eq .Content.Type "section"}}
+		{{if .Banner}}
 		<label for="banner">
 			Banner
 		</label>