Collapse (sticky) bot comments by default. (#321)

* Collapse bot comments by default.

Comments are considered bot comments if they are posted by a moderator and are stickied. Some false positives are expected.

* Remove unneeded String conversion

Co-authored-by: spikecodes <19519553+spikecodes@users.noreply.github.com>

src/post.rs

@@ -184,6 +184,14 @@ fn parse_comments(json: &serde_json::Value, post_link: &str, post_author: &str,
 			let id = val(&comment, "id");
 			let highlighted = id == highlighted_comment;
 
+			// Many subreddits have a default comment posted about the sub's rules etc.
+			// Many libreddit users do not wish to see this kind of comment by default.
+			// Reddit does not tell us which users are "bots", so a good heuristic is to
+			// collapse stickied moderator comments.
+			let is_moderator_comment = data["distinguished"].as_str().unwrap_or_default() == "moderator";
+			let is_stickied = data["stickied"].as_bool().unwrap_or_default();
+			let collapsed = is_moderator_comment && is_stickied;
+
 			Comment {
 				id,
 				kind,
@@ -216,6 +224,7 @@ fn parse_comments(json: &serde_json::Value, post_link: &str, post_author: &str,
 				edited,
 				replies,
 				highlighted,
+				collapsed,
 			}
 		})
 		.collect()

src/utils.rs

@@ -334,6 +334,7 @@ pub struct Comment {
 	pub edited: (String, String),
 	pub replies: Vec<Comment>,
 	pub highlighted: bool,
+	pub collapsed: bool,
 }
 
 #[derive(Template)]