From 8117e09fdf459694da08482cc386a88af7b3087b Mon Sep 17 00:00:00 2001
From: Colin Reeder <vpzomtrrfrt@gmail.com>
Date: Fri, 8 Jan 2021 00:46:15 -0700
Subject: Add parameter to filter communities by follow state (#134)

---
 openapi/openapi.json          |  7 +++++++
 src/routes/api/communities.rs | 27 +++++++++++++++++++++++++--
 2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/openapi/openapi.json b/openapi/openapi.json
index 8f0d2fe..d2ccd3e 100644
--- a/openapi/openapi.json
+++ b/openapi/openapi.json
@@ -478,6 +478,13 @@
 						"in": "query",
 						"required": false,
 						"schema": {"type": "string"}
+					},
+					{
+						"name": "your_follow.accepted",
+						"in": "query",
+						"required": false,
+						"schema": {"type": "boolean"},
+						"description": "Filter to either communities you are following or waiting to follow. Requires login."
 					}
 				],
 				"responses": {
diff --git a/src/routes/api/communities.rs b/src/routes/api/communities.rs
index d3f79c8..ceeafda 100644
--- a/src/routes/api/communities.rs
+++ b/src/routes/api/communities.rs
@@ -53,6 +53,9 @@ async fn route_unstable_communities_list(
         #[serde(default)]
         search: Option<Cow<'a, str>>,
 
+        #[serde(rename = "your_follow.accepted")]
+        your_follow_accepted: Option<bool>,
+
         #[serde(default)]
         include_your: bool,
     }
@@ -64,9 +67,14 @@ async fn route_unstable_communities_list(
 
     let db = ctx.db_pool.get().await?;
 
+    let login_user_maybe = if query.include_your || query.your_follow_accepted.is_some() {
+        Some(crate::require_login(&req, &db).await?)
+    } else {
+        None
+    };
+
     let include_your_for = if query.include_your {
-        let user = crate::require_login(&req, &db).await?;
-        Some(user)
+        Some(login_user_maybe.unwrap())
     } else {
         None
     };
@@ -78,9 +86,24 @@ async fn route_unstable_communities_list(
 
     sql.push_str(" FROM community");
 
+    let mut did_where = false;
+
     if let Some(search) = &query.search {
         values.push(search);
         write!(sql, " WHERE community_fts(community) @@ plainto_tsquery('english', ${0}) ORDER BY ts_rank_cd(community_fts(community), plainto_tsquery('english', ${0})) DESC", values.len()).unwrap();
+        did_where = true;
+    }
+    if let Some(req_your_follow_accepted) = &query.your_follow_accepted {
+        values.push(login_user_maybe.as_ref().unwrap());
+        write!(
+            sql,
+            " {} community.id IN (SELECT community FROM community_follow WHERE follower=${}",
+            if did_where { "AND" } else { "WHERE" },
+            values.len()
+        )
+        .unwrap();
+        values.push(req_your_follow_accepted);
+        write!(sql, " AND accepted=${})", values.len()).unwrap();
     }
 
     let sql: &str = &sql;
-- 
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