454 lines
14 KiB
Rust
454 lines
14 KiB
Rust
// CRATES
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use crate::utils::{
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catch_random, error, filter_posts, format_num, format_url, get_filters, nsfw_landing, param, redirect, rewrite_urls, setting, template, val, Post, Preferences, Subreddit,
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};
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use crate::{client::json, server::ResponseExt, RequestExt};
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use askama::Template;
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use cookie::Cookie;
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use hyper::{Body, Request, Response};
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use time::{Duration, OffsetDateTime};
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// STRUCTS
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#[derive(Template)]
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#[template(path = "subreddit.html")]
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struct SubredditTemplate {
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sub: Subreddit,
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posts: Vec<Post>,
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sort: (String, String),
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ends: (String, String),
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prefs: Preferences,
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url: String,
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redirect_url: String,
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/// Whether the subreddit itself is filtered.
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is_filtered: bool,
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/// Whether all fetched posts are filtered (to differentiate between no posts fetched in the first place,
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/// and all fetched posts being filtered).
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all_posts_filtered: bool,
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/// Whether all posts were hidden because they are NSFW (and user has disabled show NSFW)
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all_posts_hidden_nsfw: bool,
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no_posts: bool,
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}
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#[derive(Template)]
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#[template(path = "wiki.html")]
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struct WikiTemplate {
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sub: String,
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wiki: String,
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page: String,
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prefs: Preferences,
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url: String,
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}
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#[derive(Template)]
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#[template(path = "wall.html")]
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struct WallTemplate {
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title: String,
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sub: String,
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msg: String,
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prefs: Preferences,
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url: String,
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}
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// SERVICES
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pub async fn community(req: Request<Body>) -> Result<Response<Body>, String> {
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// Build Reddit API path
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let root = req.uri().path() == "/";
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let subscribed = setting(&req, "subscriptions");
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let front_page = setting(&req, "front_page");
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let post_sort = req.cookie("post_sort").map_or_else(|| "hot".to_string(), |c| c.value().to_string());
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let sort = req.param("sort").unwrap_or_else(|| req.param("id").unwrap_or(post_sort));
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let sub_name = req.param("sub").unwrap_or(if front_page == "default" || front_page.is_empty() {
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if subscribed.is_empty() {
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"popular".to_string()
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} else {
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subscribed.clone()
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}
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} else {
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front_page.clone()
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});
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let quarantined = can_access_quarantine(&req, &sub_name) || root;
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// Handle random subreddits
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if let Ok(random) = catch_random(&sub_name, "").await {
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return Ok(random);
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}
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if req.param("sub").is_some() && sub_name.starts_with("u_") {
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return Ok(redirect(&["/user/", &sub_name[2..]].concat()));
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}
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// Request subreddit metadata
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let sub = if !sub_name.contains('+') && sub_name != subscribed && sub_name != "popular" && sub_name != "all" {
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// Regular subreddit
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subreddit(&sub_name, quarantined).await.unwrap_or_default()
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} else if sub_name == subscribed {
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// Subscription feed
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if req.uri().path().starts_with("/r/") {
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subreddit(&sub_name, quarantined).await.unwrap_or_default()
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} else {
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Subreddit::default()
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}
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} else {
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// Multireddit, all, popular
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Subreddit {
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name: sub_name.clone(),
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..Subreddit::default()
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}
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};
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let req_url = req.uri().to_string();
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// Return landing page if this post if this is NSFW community but the user
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// has disabled the display of NSFW content or if the instance is SFW-only.
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if sub.nsfw && crate::utils::should_be_nsfw_gated(&req, &req_url) {
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return Ok(nsfw_landing(req, req_url).await.unwrap_or_default());
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}
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let mut params = String::from("&raw_json=1");
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if sub_name == "popular" {
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params.push_str("&geo_filter=GLOBAL");
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}
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let path = format!("/r/{sub_name}/{sort}.json?{}{params}", req.uri().query().unwrap_or_default());
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let url = String::from(req.uri().path_and_query().map_or("", |val| val.as_str()));
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let redirect_url = url[1..].replace('?', "%3F").replace('&', "%26").replace('+', "%2B");
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let filters = get_filters(&req);
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// If all requested subs are filtered, we don't need to fetch posts.
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if sub_name.split('+').all(|s| filters.contains(s)) {
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Ok(template(&SubredditTemplate {
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sub,
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posts: Vec::new(),
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sort: (sort, param(&path, "t").unwrap_or_default()),
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ends: (param(&path, "after").unwrap_or_default(), String::new()),
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prefs: Preferences::new(&req),
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url,
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redirect_url,
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is_filtered: true,
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all_posts_filtered: false,
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all_posts_hidden_nsfw: false,
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no_posts: false,
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}))
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} else {
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match Post::fetch(&path, quarantined).await {
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Ok((mut posts, after)) => {
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let (_, all_posts_filtered) = filter_posts(&mut posts, &filters);
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let no_posts = posts.is_empty();
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let all_posts_hidden_nsfw = !no_posts && (posts.iter().all(|p| p.flags.nsfw) && setting(&req, "show_nsfw") != "on");
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Ok(template(&SubredditTemplate {
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sub,
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posts,
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sort: (sort, param(&path, "t").unwrap_or_default()),
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ends: (param(&path, "after").unwrap_or_default(), after),
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prefs: Preferences::new(&req),
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url,
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redirect_url,
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is_filtered: false,
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all_posts_filtered,
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all_posts_hidden_nsfw,
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no_posts,
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}))
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}
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Err(msg) => match msg.as_str() {
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"quarantined" | "gated" => Ok(quarantine(&req, sub_name, &msg)),
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"private" => error(req, &format!("r/{sub_name} is a private community")).await,
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"banned" => error(req, &format!("r/{sub_name} has been banned from Reddit")).await,
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_ => error(req, &msg).await,
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},
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}
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}
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}
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pub fn quarantine(req: &Request<Body>, sub: String, restriction: &str) -> Response<Body> {
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let wall = WallTemplate {
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title: format!("r/{sub} is {restriction}"),
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msg: "Please click the button below to continue to this subreddit.".to_string(),
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url: req.uri().to_string(),
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sub,
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prefs: Preferences::new(req),
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};
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Response::builder()
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.status(403)
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.header("content-type", "text/html")
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.body(wall.render().unwrap_or_default().into())
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.unwrap_or_default()
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}
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pub async fn add_quarantine_exception(req: Request<Body>) -> Result<Response<Body>, String> {
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let subreddit = req.param("sub").ok_or("Invalid URL")?;
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let redir = param(&format!("?{}", req.uri().query().unwrap_or_default()), "redir").ok_or("Invalid URL")?;
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let mut response = redirect(&redir);
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response.insert_cookie(
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Cookie::build((&format!("allow_quaran_{}", subreddit.to_lowercase()), "true"))
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.path("/")
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.http_only(true)
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.expires(cookie::Expiration::Session)
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.into(),
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);
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Ok(response)
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}
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pub fn can_access_quarantine(req: &Request<Body>, sub: &str) -> bool {
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// Determine if the subreddit can be accessed
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setting(req, &format!("allow_quaran_{}", sub.to_lowercase())).parse().unwrap_or_default()
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}
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// Sub, filter, unfilter, or unsub by setting subscription cookie using response "Set-Cookie" header
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pub async fn subscriptions_filters(req: Request<Body>) -> Result<Response<Body>, String> {
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let sub = req.param("sub").unwrap_or_default();
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let action: Vec<String> = req.uri().path().split('/').map(String::from).collect();
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// Handle random subreddits
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if sub == "random" || sub == "randnsfw" {
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if action.contains(&"filter".to_string()) || action.contains(&"unfilter".to_string()) {
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return Err("Can't filter random subreddit!".to_string());
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}
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return Err("Can't subscribe to random subreddit!".to_string());
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}
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let query = req.uri().query().unwrap_or_default().to_string();
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let preferences = Preferences::new(&req);
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let mut sub_list = preferences.subscriptions;
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let mut filters = preferences.filters;
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// Retrieve list of posts for these subreddits to extract display names
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let posts = json(format!("/r/{sub}/hot.json?raw_json=1"), true).await;
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let display_lookup: Vec<(String, &str)> = match &posts {
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Ok(posts) => posts["data"]["children"]
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.as_array()
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.map(|list| {
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list
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.iter()
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.map(|post| {
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let display_name = post["data"]["subreddit"].as_str().unwrap_or_default();
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(display_name.to_lowercase(), display_name)
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})
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.collect::<Vec<_>>()
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})
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.unwrap_or_default(),
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Err(_) => vec![],
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};
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// Find each subreddit name (separated by '+') in sub parameter
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for part in sub.split('+').filter(|x| x != &"") {
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// Retrieve display name for the subreddit
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let display;
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let part = if part.starts_with("u_") {
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part
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} else if let Some(&(_, display)) = display_lookup.iter().find(|x| x.0 == part.to_lowercase()) {
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// This is already known, doesn't require separate request
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display
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} else {
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// This subreddit display name isn't known, retrieve it
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let path: String = format!("/r/{part}/about.json?raw_json=1");
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display = json(path, true).await;
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match &display {
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Ok(display) => display["data"]["display_name"].as_str(),
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Err(_) => None,
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}
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.unwrap_or(part)
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};
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// Modify sub list based on action
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if action.contains(&"subscribe".to_string()) && !sub_list.contains(&part.to_owned()) {
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// Add each sub name to the subscribed list
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sub_list.push(part.to_owned());
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filters.retain(|s| s.to_lowercase() != part.to_lowercase());
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// Reorder sub names alphabetically
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sub_list.sort_by_key(|a| a.to_lowercase());
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filters.sort_by_key(|a| a.to_lowercase());
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} else if action.contains(&"unsubscribe".to_string()) {
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// Remove sub name from subscribed list
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sub_list.retain(|s| s.to_lowercase() != part.to_lowercase());
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} else if action.contains(&"filter".to_string()) && !filters.contains(&part.to_owned()) {
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// Add each sub name to the filtered list
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filters.push(part.to_owned());
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sub_list.retain(|s| s.to_lowercase() != part.to_lowercase());
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// Reorder sub names alphabetically
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filters.sort_by_key(|a| a.to_lowercase());
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sub_list.sort_by_key(|a| a.to_lowercase());
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} else if action.contains(&"unfilter".to_string()) {
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// Remove sub name from filtered list
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filters.retain(|s| s.to_lowercase() != part.to_lowercase());
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}
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}
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// Redirect back to subreddit
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// check for redirect parameter if unsubscribing/unfiltering from outside sidebar
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let path = if let Some(redirect_path) = param(&format!("?{query}"), "redirect") {
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format!("/{redirect_path}")
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} else {
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format!("/r/{sub}")
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};
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let mut response = redirect(&path);
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// Delete cookie if empty, else set
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if sub_list.is_empty() {
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response.remove_cookie("subscriptions".to_string());
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} else {
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response.insert_cookie(
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Cookie::build(("subscriptions", sub_list.join("+")))
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.path("/")
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.http_only(true)
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.expires(OffsetDateTime::now_utc() + Duration::weeks(52))
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.into(),
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);
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}
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if filters.is_empty() {
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response.remove_cookie("filters".to_string());
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} else {
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response.insert_cookie(
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Cookie::build(("filters", filters.join("+")))
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.path("/")
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.http_only(true)
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.expires(OffsetDateTime::now_utc() + Duration::weeks(52))
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.into(),
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);
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}
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Ok(response)
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}
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pub async fn wiki(req: Request<Body>) -> Result<Response<Body>, String> {
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let sub = req.param("sub").unwrap_or_else(|| "reddit.com".to_string());
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let quarantined = can_access_quarantine(&req, &sub);
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// Handle random subreddits
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if let Ok(random) = catch_random(&sub, "/wiki").await {
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return Ok(random);
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}
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let page = req.param("page").unwrap_or_else(|| "index".to_string());
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let path: String = format!("/r/{sub}/wiki/{page}.json?raw_json=1");
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let url = req.uri().to_string();
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match json(path, quarantined).await {
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Ok(response) => Ok(template(&WikiTemplate {
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sub,
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wiki: rewrite_urls(response["data"]["content_html"].as_str().unwrap_or("<h3>Wiki not found</h3>")),
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page,
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prefs: Preferences::new(&req),
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url,
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})),
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Err(msg) => {
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if msg == "quarantined" || msg == "gated" {
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Ok(quarantine(&req, sub, &msg))
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} else {
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error(req, &msg).await
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}
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}
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}
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}
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pub async fn sidebar(req: Request<Body>) -> Result<Response<Body>, String> {
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let sub = req.param("sub").unwrap_or_else(|| "reddit.com".to_string());
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let quarantined = can_access_quarantine(&req, &sub);
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// Handle random subreddits
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if let Ok(random) = catch_random(&sub, "/about/sidebar").await {
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return Ok(random);
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}
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// Build the Reddit JSON API url
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let path: String = format!("/r/{sub}/about.json?raw_json=1");
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let url = req.uri().to_string();
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// Send a request to the url
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match json(path, quarantined).await {
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// If success, receive JSON in response
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Ok(response) => Ok(template(&WikiTemplate {
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wiki: rewrite_urls(&val(&response, "description_html")),
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// wiki: format!(
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// "{}<hr><h1>Moderators</h1><br><ul>{}</ul>",
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// rewrite_urls(&val(&response, "description_html"),
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// moderators(&sub, quarantined).await.unwrap_or(vec!["Could not fetch moderators".to_string()]).join(""),
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// ),
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sub,
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page: "Sidebar".to_string(),
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prefs: Preferences::new(&req),
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url,
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})),
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Err(msg) => {
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if msg == "quarantined" || msg == "gated" {
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Ok(quarantine(&req, sub, &msg))
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} else {
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error(req, &msg).await
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}
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}
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}
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}
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// pub async fn moderators(sub: &str, quarantined: bool) -> Result<Vec<String>, String> {
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// // Retrieve and format the html for the moderators list
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// Ok(
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// moderators_list(sub, quarantined)
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// .await?
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// .iter()
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// .map(|m| format!("<li><a style=\"color: var(--accent)\" href=\"/u/{name}\">{name}</a></li>", name = m))
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// .collect(),
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// )
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// }
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// async fn moderators_list(sub: &str, quarantined: bool) -> Result<Vec<String>, String> {
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// // Build the moderator list URL
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// let path: String = format!("/r/{}/about/moderators.json?raw_json=1", sub);
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// // Retrieve response
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// json(path, quarantined).await.map(|response| {
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// // Traverse json tree and format into list of strings
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// response["data"]["children"]
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// .as_array()
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// .unwrap_or(&Vec::new())
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// .iter()
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// .filter_map(|moderator| {
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// let name = moderator["name"].as_str().unwrap_or_default();
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// if name.is_empty() {
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// None
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// } else {
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// Some(name.to_string())
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// }
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// })
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// .collect::<Vec<_>>()
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// })
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// }
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// SUBREDDIT
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async fn subreddit(sub: &str, quarantined: bool) -> Result<Subreddit, String> {
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// Build the Reddit JSON API url
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let path: String = format!("/r/{sub}/about.json?raw_json=1");
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// Send a request to the url
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let res = json(path, quarantined).await?;
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// Metadata regarding the subreddit
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let members: i64 = res["data"]["subscribers"].as_u64().unwrap_or_default() as i64;
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let active: i64 = res["data"]["accounts_active"].as_u64().unwrap_or_default() as i64;
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// Fetch subreddit icon either from the community_icon or icon_img value
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let community_icon: &str = res["data"]["community_icon"].as_str().unwrap_or_default();
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let icon = if community_icon.is_empty() { val(&res, "icon_img") } else { community_icon.to_string() };
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Ok(Subreddit {
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name: val(&res, "display_name"),
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title: val(&res, "title"),
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description: val(&res, "public_description"),
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info: rewrite_urls(&val(&res, "description_html")),
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// moderators: moderators_list(sub, quarantined).await.unwrap_or_default(),
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icon: format_url(&icon),
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members: format_num(members),
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active: format_num(active),
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wiki: res["data"]["wiki_enabled"].as_bool().unwrap_or_default(),
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nsfw: res["data"]["over18"].as_bool().unwrap_or_default(),
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})
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}
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#[tokio::test(flavor = "multi_thread")]
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async fn test_fetching_subreddit() {
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let subreddit = subreddit("rust", false).await;
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assert!(subreddit.is_ok());
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}
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