Optimize use of Result<>

src/main.rs

@@ -34,8 +34,7 @@ async fn main() -> std::io::Result<()> {
 	if args.len() > 1 {
 		for arg in args {
 			if arg.starts_with("--address=") || arg.starts_with("-a=") {
-				let split: Vec<&str> = arg.split('=').collect();
-				address = split[1].to_string();
+				address = arg.split('=').collect::<Vec<&str>>()[1].to_string();
 			}
 		}
 	}
@@ -81,6 +80,9 @@ async fn main() -> std::io::Result<()> {
 			.route("/r/{sub}/comments/{id}/{title}/{comment_id}/", web::get().to(post::item))
 	})
 	.bind(&address)
+	.map(|x| {
+		x
+	})
 	.unwrap_or_else(|_| panic!("Cannot bind to the address: {}", address))
 	.run()
 	.await

src/post.rs

@@ -1,6 +1,6 @@
 // CRATES
 use crate::utils::{cookie, error, format_num, format_url, media, param, request, rewrite_url, val, Comment, Flags, Flair, Post};
-use actix_web::{HttpRequest, HttpResponse, Result};
+use actix_web::{HttpRequest, HttpResponse};
 
 use async_recursion::async_recursion;
 
@@ -30,8 +30,8 @@ pub async fn item(req: HttpRequest) -> HttpResponse {
 		// Otherwise, grab the JSON output from the request
 		Ok(res) => {
 			// Parse the JSON into Post and Comment structs
-			let post = parse_post(&res[0]).await.unwrap();
-			let comments = parse_comments(&res[1]).await.unwrap();
+			let post = parse_post(&res[0]).await;
+			let comments = parse_comments(&res[1]).await;
 
 			// Use the Post and Comment structs to generate a website to show users
 			let s = PostTemplate {
@@ -50,7 +50,7 @@ pub async fn item(req: HttpRequest) -> HttpResponse {
 }
 
 // POSTS
-async fn parse_post(json: &serde_json::Value) -> Result<Post, &'static str> {
+async fn parse_post(json: &serde_json::Value) -> Post {
 	// Retrieve post (as opposed to comments) from JSON
 	let post: &serde_json::Value = &json["data"]["children"][0];
 
@@ -61,10 +61,10 @@ async fn parse_post(json: &serde_json::Value) -> Result<Post, &'static str> {
 	let ratio: f64 = post["data"]["upvote_ratio"].as_f64().unwrap_or(1.0) * 100.0;
 
 	// Determine the type of media along with the media URL
-	let media = media(&post["data"]).await;
+	let (post_type, media) = media(&post["data"]).await;
 
 	// Build a post using data parsed from Reddit post API
-	Ok(Post {
+	Post {
 		id: val(post, "id"),
 		title: val(post, "title"),
 		community: val(post, "subreddit"),
@@ -78,7 +78,7 @@ async fn parse_post(json: &serde_json::Value) -> Result<Post, &'static str> {
 		permalink: val(post, "permalink"),
 		score: format_num(score),
 		upvote_ratio: ratio as i64,
-		post_type: media.0,
+		post_type,
 		thumbnail: format_url(val(post, "thumbnail")),
 		flair: Flair(
 			val(post, "link_flair_text"),
@@ -93,14 +93,14 @@ async fn parse_post(json: &serde_json::Value) -> Result<Post, &'static str> {
 			nsfw: post["data"]["over_18"].as_bool().unwrap_or(false),
 			stickied: post["data"]["stickied"].as_bool().unwrap_or(false),
 		},
-		media: media.1,
+		media,
 		time: OffsetDateTime::from_unix_timestamp(unix_time).format("%b %d %Y %H:%M UTC"),
-	})
+	}
 }
 
 // COMMENTS
 #[async_recursion]
-async fn parse_comments(json: &serde_json::Value) -> Result<Vec<Comment>, &'static str> {
+async fn parse_comments(json: &serde_json::Value) -> Vec<Comment> {
 	// Separate the comment JSON into a Vector of comments
 	let comment_data = json["data"]["children"].as_array().unwrap();
 
@@ -117,7 +117,7 @@ async fn parse_comments(json: &serde_json::Value) -> Result<Vec<Comment>, &'stat
 		let body = rewrite_url(&val(comment, "body_html"));
 
 		let replies: Vec<Comment> = if comment["data"]["replies"].is_object() {
-			parse_comments(&comment["data"]["replies"]).await.unwrap_or_default()
+			parse_comments(&comment["data"]["replies"]).await
 		} else {
 			Vec::new()
 		};
@@ -137,5 +137,5 @@ async fn parse_comments(json: &serde_json::Value) -> Result<Vec<Comment>, &'stat
 		});
 	}
 
-	Ok(comments)
+	comments
 }

src/search.rs

@@ -33,16 +33,16 @@ pub async fn find(req: HttpRequest) -> HttpResponse {
 	let sub = req.match_info().get("sub").unwrap_or("").to_string();
 
 	match fetch_posts(&path, String::new()).await {
-		Ok(posts) => HttpResponse::Ok().content_type("text/html").body(
+		Ok((posts, after)) => HttpResponse::Ok().content_type("text/html").body(
 			SearchTemplate {
-				posts: posts.0,
+				posts,
 				sub,
 				params: SearchParams {
 					q: param(&path, "q"),
 					sort,
 					t: param(&path, "t"),
 					before: param(&path, "after"),
-					after: posts.1,
+					after,
 					restrict_sr: param(&path, "restrict_sr"),
 				},
 				layout: cookie(req, "layout"),

src/subreddit.rs

@@ -36,12 +36,12 @@ pub async fn page(req: HttpRequest) -> HttpResponse {
 	};
 
 	match fetch_posts(&path, String::new()).await {
-		Ok(items) => {
+		Ok((posts,after)) => {
 			let s = SubredditTemplate {
 				sub: sub_result,
-				posts: items.0,
+				posts: posts,
 				sort: (sort, param(&path, "t")),
-				ends: (param(&path, "after"), items.1),
+				ends: (param(&path, "after"), after),
 				layout: cookie(req, "layout"),
 			}
 			.render()

src/user.rs

@@ -29,12 +29,12 @@ pub async fn profile(req: HttpRequest) -> HttpResponse {
 	let posts = fetch_posts(&path, "Comment".to_string()).await;
 
 	match posts {
-		Ok(items) => {
+		Ok((posts, after)) => {
 			let s = UserTemplate {
 				user: user.unwrap(),
-				posts: items.0,
+				posts,
 				sort: (sort, param(&path, "t")),
-				ends: (param(&path, "after"), items.1),
+				ends: (param(&path, "after"), after),
 				layout: cookie(req, "layout"),
 			}
 			.render()

src/utils.rs

@@ -108,7 +108,7 @@ pub fn param(path: &str, value: &str) -> String {
 	pairs.get(value).unwrap_or(&String::new()).to_owned()
 }
 
-// Cookie value from request
+// Parse Cookie value from request
 pub fn cookie(req: actix_web::HttpRequest, name: &str) -> String {
 	actix_web::HttpMessage::cookie(&req, name).unwrap_or_else(|| Cookie::new(name, "")).value().to_string()
 }
@@ -172,7 +172,7 @@ pub fn nested_val(j: &serde_json::Value, n: &str, k: &str) -> String {
 	String::from(j["data"][n][k].as_str().unwrap_or_default())
 }
 
-// Fetch posts of a user or subreddit
+// Fetch posts of a user or subreddit and return a vector of posts and the "after" value
 pub async fn fetch_posts(path: &str, fallback_title: String) -> Result<(Vec<Post>, String), &'static str> {
 	let res;
 	let post_list;
@@ -180,9 +180,7 @@ pub async fn fetch_posts(path: &str, fallback_title: String) -> Result<(Vec<Post
 	// Send a request to the url
 	match request(&path).await {
 		// If success, receive JSON in response
-		Ok(response) => {
-			res = response;
-		}
+		Ok(response) => { res = response;	}
 		// If the Reddit API returns an error, exit this function
 		Err(msg) => return Err(msg),
 	}
@@ -203,7 +201,7 @@ pub async fn fetch_posts(path: &str, fallback_title: String) -> Result<(Vec<Post
 		let title = val(post, "title");
 
 		// Determine the type of media along with the media URL
-		let media = media(&post["data"]).await;
+		let (post_type, media) = media(&post["data"]).await;
 
 		posts.push(Post {
 			id: val(post, "id"),
@@ -218,9 +216,9 @@ pub async fn fetch_posts(path: &str, fallback_title: String) -> Result<(Vec<Post
 			),
 			score: format_num(score),
 			upvote_ratio: ratio as i64,
-			post_type: media.0,
+			post_type,
 			thumbnail: format_url(val(post, "thumbnail")),
-			media: media.1,
+			media,
 			flair: Flair(
 				val(post, "link_flair_text"),
 				val(post, "link_flair_background_color"),