other discussions link. fixes #74

state.go

@@ -55,6 +55,7 @@ type Post struct {
 	lemmy.PostView
 	Rank       int
 	State      *State
+	CrossPosts int
 }
 
 type Session struct {
@@ -666,10 +667,19 @@ func (state *State) GetPost(postid int64) {
 		state.Error = err
 		return
 	}
-	state.Posts = []Post{Post{
+	post := Post{
 		PostView:   resp.PostView,
 		State:      state,
-	}}
+		CrossPosts: len(resp.CrossPosts),
+	}
+	if state.Listing == "Local" && post.Post.Local {
+		for _, p := range resp.CrossPosts {
+			if !p.Post.Local {
+				post.CrossPosts--
+			}
+		}
+	}
+	state.Posts = []Post{post}
 	if state.CommentID > 0 && len(state.Posts) > 0 {
 		state.Posts[0].Rank = -1
 	}

templates/nav.html

@@ -84,6 +84,10 @@
         <li id="showimages"><a id="se" href="">show images</a></li>
           {{ end }}
         {{ end }}
+
+        {{ if and .PostID }}{{ $post := (index .Posts 0) }}{{ if $post.CrossPosts }}
+        <li><a href="/{{.Host}}/search?q={{ $post.Post.URL.String }}&searchtype=Url{{ if not $post.Post.Local }}&listingType=All{{end}}">other discussions ({{ $post.CrossPosts }})</a></li>
+        {{ end }}{{ end }}
       </ul>
       {{ end }}
     </nav>