Make the follow button a bit smarter

src/models/users.rs

@@ -285,6 +285,16 @@ impl User {
         users::table.filter(users::id.eq(any(follows))).load::<User>(conn).unwrap()
     }
 
+    pub fn is_following(&self, conn: &PgConnection, other_id: i32) -> bool {
+        use schema::follows;
+        follows::table
+            .filter(follows::follower_id.eq(other_id))
+            .filter(follows::following_id.eq(self.id))
+            .load::<Follow>(conn)
+            .expect("Couldn't load follow relationship")
+            .len() > 0
+    }
+
     pub fn has_liked(&self, conn: &PgConnection, post: &Post) -> bool {
         use schema::likes;
         use models::likes::Like;

src/routes/user.rs

@@ -44,6 +44,7 @@ fn details(name: String, conn: DbConn, account: Option<User>) -> Template {
         "user": serde_json::to_value(user.clone()).unwrap(),
         "instance_url": user.get_instance(&*conn).public_domain,
         "is_remote": user.instance_id != Instance::local_id(&*conn),
+        "follows": account.clone().map(|x| x.is_following(&*conn, user.id)).unwrap_or(false),
         "account": account,
         "recents": recents.into_iter().map(|p| {
             json!({
@@ -120,6 +121,7 @@ fn followers(name: String, conn: DbConn, account: Option<User>) -> Template {
         "user": serde_json::to_value(user.clone()).unwrap(),
         "instance_url": user.get_instance(&*conn).public_domain,
         "is_remote": user.instance_id != Instance::local_id(&*conn),
+        "follows": account.clone().map(|x| x.is_following(&*conn, user.id)).unwrap_or(false),
         "followers": user.get_followers(&*conn).into_iter().map(|f| {
             let fqn = f.get_fqn(&*conn);
             let mut json = serde_json::to_value(f).unwrap();

templates/users/details.html.tera

@@ -32,8 +32,12 @@
             <a class="inline-block button" href="{{ user.ap_url }}">Open on {{ instance_url }}</a>
         {% endif %}
 
-        {% if not is_self %}
-            <a href="follow/" class="inline-block button">Follow</a>
+        {% if not is_self and account %}
+            {% if follows %}
+                <a href="follow/" class="inline-block button">Follow</a>
+            {% else %}
+                <a href="follow/" class="inline-block button">Unfollow</a>
+            {% endif %}
         {% endif %}
     </div>
 

templates/users/followers.html.tera

@@ -27,8 +27,12 @@
             <a class="inline-block button" href="{{ user.ap_url }}">Open on {{ instance_url }}</a>
         {% endif %}
 
-        {% if not is_self %}
-            <a href="follow/" class="inline-block button">Follow</a>
+        {% if not is_self and account %}
+            {% if follows %}
+                <a href="../follow/" class="inline-block button">Follow</a>
+            {% else %}
+                <a href="../follow/" class="inline-block button">Unfollow</a>
+            {% endif %}
         {% endif %}
     </div>