Implemented phase 5 for the POC prototype in the Website service.

Services/Website/Sources/Library/Internal/Pages/ListingPage.swift

@@ -95,7 +95,13 @@ extension ListingPage: Page {
                                 listing.title
                             }
                             p(.class("listing__byline")) {
-                                "\(listing.publisher) · \(listing.year) · \((listing.kind?.singular ?? listing.format).lowercased())"
+                                "\(listing.publisher) · \(listing.year) · \((listing.kind?.singular ?? listing.format).lowercased()) · "
+                                a(
+                                    .class("listing__series"),
+                                    .href(.Route.series(listing.seriesSlug, issue: listing.issueNumber) + (listing.issueNumber == nil ? "" : "#copies"))
+                                ) {
+                                    listing.issueNumber == nil ? "\(listing.seriesName) series" : "\(listing.seriesName) series · compare copies"
+                                }
                             }
                         }
                         buyBox
@@ -224,16 +230,12 @@ private extension ListingPage {
                         listing.acceptsOffers ? " · accepts offers" : ""
                     }
                 }
-                if viewer == nil {
-                    a(
-                        .class("button button--sm"),
-                        .href(.Route.signIn(returningTo: listing.path))
-                    ) {
-                        Icon(.bookmark, size: 16)
-                        "Save"
-                    }
-                } else {
-                    Unavailable("Save", modifier: "button--sm")
+                a(
+                    .class("button button--sm"),
+                    .href(.Route.newWant(listing: listing.slug))
+                ) {
+                    Icon(.bookmark, size: 16)
+                    "Save"
                 }
             }
             if !listing.isAvailable {