Tweak links to _changes feed

src/resources/article_revision_resource.rs

@@ -38,7 +38,7 @@ pub fn timestamp_and_author(sequence_number: i32, article_id: i32, created: &Dat
         author: Option<Author<'a>>,
     }
 
-    let pagination = Pagination::Before(sequence_number + 1);
+    let pagination = Pagination::After(sequence_number - 1);
 
     Template {
         created: &created.to_rfc2822(),
@@ -53,6 +53,7 @@ pub fn timestamp_and_author(sequence_number: i32, article_id: i32, created: &Dat
             history: format!("_changes{}",
                 QueryParameters::default()
                     .pagination(pagination)
+                    .article_id(Some(article_id))
                     .author(Some(author.to_owned()))
                     .into_link()
             ),

src/resources/changes_resource.rs

@@ -202,8 +202,9 @@ impl Resource for ChangesResource {
     fn get(self: Box<Self>) -> ResponseFuture {
         use chrono::{TimeZone, Local};
 
-        struct Row {
-            sequence_number_plus_one: i32,
+        struct Row<'a> {
+            resource: &'a ChangesResource,
+            sequence_number: i32,
 
             article_id: i32,
             revision: i32,
@@ -216,6 +217,15 @@ impl Resource for ChangesResource {
             _latest: bool,
         }
 
+        impl<'a> Row<'a> {
+            fn author_link(&self) -> String {
+                self.resource.query_args()
+                    .pagination(Pagination::After(self.sequence_number))
+                    .author(self.author.clone())
+                    .into_link()
+            }
+        }
+
         struct NavLinks {
             more: String,
             end: String,
@@ -226,7 +236,7 @@ impl Resource for ChangesResource {
         struct Template<'a> {
             newer: Option<NavLinks>,
             older: Option<NavLinks>,
-            changes: &'a [Row],
+            changes: &'a [Row<'a>],
         }
 
         let (before, article_id, author, limit) =
@@ -281,7 +291,8 @@ impl Resource for ChangesResource {
 
                 let changes = &data.into_iter().map(|x| {
                     Row {
-                        sequence_number_plus_one: x.sequence_number + 1,
+                        resource: &self,
+                        sequence_number: x.sequence_number,
                         article_id: x.article_id,
                         revision: x.revision,
                         created: Local.from_utc_datetime(&x.created).to_rfc2822(),

templates/changes.html

@@ -20,7 +20,7 @@
     <tr>
         <td><a href="_revisions/{{.article_id}}/{{.revision}}">{{.title}}</a></td>
         <td>{{.created}}</td>
-        <td>{{#.author}}<a href="_changes?before={{..sequence_number_plus_one}}&amp;author={{.}}">{{.}}</a>{{/.author}}{{^.author}}<i>Anonymous</i>{{/.author}}</td>
+        <td>{{#.author}}<a href="{{..author_link()}}">{{.}}</a>{{/.author}}{{^.author}}<i>Anonymous</i>{{/.author}}</td>
     </tr>
     {{/changes}}
 </table>