Show instance stats on About page

This also moves the stats database logic out of nodeinfo.go and into
database.go.

app.go

@@ -99,6 +99,8 @@ func handleTemplatedPage(app *app, w http.ResponseWriter, r *http.Request, t *te
 		page.StaticPage
 		Content template.HTML
 		Updated string
+
+		AboutStats *InstanceStats
 	}{
 		StaticPage: pageForReq(app, r),
 	}
@@ -109,6 +111,11 @@ func handleTemplatedPage(app *app, w http.ResponseWriter, r *http.Request, t *te
 
 		if r.URL.Path == "/about" {
 			c, err = getAboutPage(app)
+
+			// Fetch stats
+			p.AboutStats = &InstanceStats{}
+			p.AboutStats.NumPosts, _ = app.db.GetTotalPosts()
+			p.AboutStats.NumBlogs, _ = app.db.GetTotalCollections()
 		} else {
 			c, updated, err = getPrivacyPage(app)
 		}

database.go

@@ -50,6 +50,8 @@ type writestore interface {
 	GetCollections(u *User) (*[]Collection, error)
 	GetPublishableCollections(u *User) (*[]Collection, error)
 	GetMeStats(u *User) userMeStats
+	GetTotalCollections() (int64, error)
+	GetTotalPosts() (int64, error)
 	GetTopPosts(u *User, alias string) (*[]PublicPost, error)
 	GetAnonymousPosts(u *User) (*[]PublicPost, error)
 	GetUserPosts(u *User) (*[]PublicPost, error)
@@ -1541,6 +1543,22 @@ func (db *datastore) GetMeStats(u *User) userMeStats {
 	return s
 }
 
+func (db *datastore) GetTotalCollections() (collCount int64, err error) {
+	err = db.QueryRow(`SELECT COUNT(*) FROM collections`).Scan(&collCount)
+	if err != nil {
+		log.Error("Unable to fetch collections count: %v", err)
+	}
+	return
+}
+
+func (db *datastore) GetTotalPosts() (postCount int64, err error) {
+	err = db.QueryRow(`SELECT COUNT(*) FROM posts`).Scan(&postCount)
+	if err != nil {
+		log.Error("Unable to fetch posts count: %v", err)
+	}
+	return
+}
+
 func (db *datastore) GetTopPosts(u *User, alias string) (*[]PublicPost, error) {
 	params := []interface{}{u.ID}
 	where := ""

instance.go

@@ -0,0 +1,6 @@
+package writefreely
+
+type InstanceStats struct {
+	NumPosts int64
+	NumBlogs int64
+}

nodeinfo.go

@@ -57,12 +57,14 @@ func (r nodeInfoResolver) IsOpenRegistration() (bool, error) {
 }
 
 func (r nodeInfoResolver) Usage() (nodeinfo.Usage, error) {
-	var collCount, postCount, activeHalfYear, activeMonth int
-	err := r.db.QueryRow(`SELECT COUNT(*) FROM collections`).Scan(&collCount)
+	var collCount, postCount int64
+	var activeHalfYear, activeMonth int
+	var err error
+	collCount, err = r.db.GetTotalCollections()
 	if err != nil {
 		collCount = 0
 	}
-	err = r.db.QueryRow(`SELECT COUNT(*) FROM posts`).Scan(&postCount)
+	postCount, err = r.db.GetTotalPosts()
 	if err != nil {
 		log.Error("Unable to fetch post counts: %v", err)
 	}
@@ -88,10 +90,10 @@ WHERE collection_id IS NOT NULL
 
 	return nodeinfo.Usage{
 		Users: nodeinfo.UsageUsers{
-			Total:          collCount,
+			Total:          int(collCount),
 			ActiveHalfYear: activeHalfYear,
 			ActiveMonth:    activeMonth,
 		},
-		LocalPosts: postCount,
+		LocalPosts: int(postCount),
 	}, nil
 }

pages/about.tmpl

@@ -6,6 +6,11 @@
 
 		{{.Content}}
 
+		{{if .Federation}}
+			<hr style="margin:1.5em 0;" />
+			<p><em>{{.SiteName}}</em> is home to <strong>{{largeNumFmt .AboutStats.NumPosts}}</strong> {{pluralize "article" "articles" .AboutStats.NumPosts}} across <strong>{{largeNumFmt .AboutStats.NumBlogs}}</strong> {{pluralize "blog" "blogs" .AboutStats.NumBlogs}}.</p>
+		{{end}}
+
 		<h2 style="margin-top:2em">About WriteFreely</h2>
 		<p><a href="https://writefreely.org">WriteFreely</a> is a self-hosted, decentralized blogging platform for publishing beautiful, simple blogs.</p>
 		<p>It lets you publish a single blog, or host a community of writers who can create multiple blogs under one account. You can also enable federation, which allows people in the fediverse to follow your blog, bookmark your posts, and share them with others.</p>