mirror of
https://github.com/redlib-org/redlib.git
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661 lines
22 KiB
Rust
661 lines
22 KiB
Rust
#![allow(clippy::cmp_owned)]
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use crate::{config, utils};
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// CRATES
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use crate::utils::{
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catch_random, error, filter_posts, format_num, format_url, get_filters, info, nsfw_landing, param, redirect, rewrite_urls, setting, template, val, Post, Preferences,
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Subreddit,
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};
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use crate::{client::json, server::RequestExt, server::ResponseExt};
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use cookie::Cookie;
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use hyper::{Body, Request, Response};
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use log::debug;
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use rinja::Template;
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use chrono::DateTime;
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use once_cell::sync::Lazy;
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use regex::Regex;
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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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static GEO_FILTER_MATCH: Lazy<Regex> = Lazy::new(|| Regex::new(r"geo_filter=(?<region>\w+)").unwrap());
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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 query = req.uri().query().unwrap_or_default().to_string();
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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 remove_default_feeds = setting(&req, "remove_default_feeds") == "on";
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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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if (sub_name == "popular" || sub_name == "all") && remove_default_feeds {
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if subscribed.is_empty() {
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return info(req, "Subscribe to some subreddits! (Default feeds disabled in settings)").await;
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} else {
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// If there are subscribed subs, but we get here, then the problem is that front_page pref is set to something besides default.
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// Tell user to go to settings and change front page to default.
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return info(
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req,
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"You have subscribed to some subreddits, but your front page is not set to default. Visit settings and change front page to default.",
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)
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.await;
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}
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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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let geo_filter = match GEO_FILTER_MATCH.captures(&query) {
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Some(geo_filter) => geo_filter["region"].to_string(),
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None => "GLOBAL".to_owned(),
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};
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params.push_str(&format!("&geo_filter={geo_filter}"));
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}
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let path = format!("/r/{}/{sort}.json?{}{params}", sub_name.replace('+', "%2B"), req.uri().query().unwrap_or_default());
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debug!("Path: {}", path);
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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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if sort == "new" {
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posts.sort_by(|a, b| b.created_ts.cmp(&a.created_ts));
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posts.sort_by(|a, b| b.flags.stickied.cmp(&a.flags.stickied));
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}
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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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// Join items in chunks of 4000 bytes in length for cookies
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pub fn join_until_size_limit<T: std::fmt::Display>(vec: &[T]) -> Vec<std::string::String> {
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let mut result = Vec::new();
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let mut list = String::new();
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let mut current_size = 0;
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for item in vec {
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// Size in bytes
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let item_size = item.to_string().len();
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// Use 4000 bytes to leave us some headroom because the name and options of the cookie count towards the 4096 byte cap
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if current_size + item_size > 4000 {
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// If last item add a seperator on the end of the list so it's interpreted properly in tanden with the next cookie
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list.push('+');
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// Push current list to result vector
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result.push(list);
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// Reset the list variable so we can continue with only new items
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list = String::new();
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}
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// Add separator if not the first item
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if !list.is_empty() {
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list.push('+');
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}
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// Add current item to list
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list.push_str(&item.to_string());
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current_size = list.len() + item_size;
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}
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// Make sure to push whatever the remaining subreddits are there into the result vector
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result.push(list);
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// Return resulting vector
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result
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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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// If sub_list is empty remove all subscriptions cookies, otherwise update them and remove old ones
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if sub_list.is_empty() {
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// Remove subscriptions cookie
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response.remove_cookie("subscriptions".to_string());
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// Start with first numbered subscriptions cookie
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let mut subscriptions_number = 1;
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// While whatever subscriptionsNUMBER cookie we're looking at has a value
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while req.cookie(&format!("subscriptions{}", subscriptions_number)).is_some() {
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// Remove that subscriptions cookie
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response.remove_cookie(format!("subscriptions{}", subscriptions_number));
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// Increment subscriptions cookie number
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subscriptions_number += 1;
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}
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} else {
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// Start at 0 to keep track of what number we need to start deleting old subscription cookies from
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let mut subscriptions_number_to_delete_from = 0;
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// Starting at 0 so we handle the subscription cookie without a number first
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for (subscriptions_number, list) in join_until_size_limit(&sub_list).into_iter().enumerate() {
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let subscriptions_cookie = if subscriptions_number == 0 {
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"subscriptions".to_string()
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} else {
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format!("subscriptions{}", subscriptions_number)
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};
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response.insert_cookie(
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Cookie::build((subscriptions_cookie, list))
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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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subscriptions_number_to_delete_from += 1;
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}
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// While whatever subscriptionsNUMBER cookie we're looking at has a value
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while req.cookie(&format!("subscriptions{}", subscriptions_number_to_delete_from)).is_some() {
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// Remove that subscriptions cookie
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response.remove_cookie(format!("subscriptions{}", subscriptions_number_to_delete_from));
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// Increment subscriptions cookie number
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subscriptions_number_to_delete_from += 1;
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}
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}
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// If filters is empty remove all filters cookies, otherwise update them and remove old ones
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if filters.is_empty() {
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// Remove filters cookie
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response.remove_cookie("filters".to_string());
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// Start with first numbered filters cookie
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let mut filters_number = 1;
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// While whatever filtersNUMBER cookie we're looking at has a value
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while req.cookie(&format!("filters{}", filters_number)).is_some() {
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// Remove that filters cookie
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response.remove_cookie(format!("filters{}", filters_number));
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// Increment filters cookie number
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filters_number += 1;
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}
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} else {
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// Start at 0 to keep track of what number we need to start deleting old filters cookies from
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let mut filters_number_to_delete_from = 0;
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for (filters_number, list) in join_until_size_limit(&filters).into_iter().enumerate() {
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let filters_cookie = if filters_number == 0 {
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"filters".to_string()
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} else {
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format!("filters{}", filters_number)
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};
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response.insert_cookie(
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Cookie::build((filters_cookie, list))
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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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filters_number_to_delete_from += 1;
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}
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// While whatever filtersNUMBER cookie we're looking at has a value
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while req.cookie(&format!("filters{}", filters_number_to_delete_from)).is_some() {
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// Remove that filters cookie
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response.remove_cookie(format!("filters{}", filters_number_to_delete_from));
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// Increment filters cookie number
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filters_number_to_delete_from += 1;
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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");
|
|
let url = req.uri().to_string();
|
|
|
|
match json(path, quarantined).await {
|
|
Ok(response) => Ok(template(&WikiTemplate {
|
|
sub,
|
|
wiki: rewrite_urls(response["data"]["content_html"].as_str().unwrap_or("<h3>Wiki not found</h3>")),
|
|
page,
|
|
prefs: Preferences::new(&req),
|
|
url,
|
|
})),
|
|
Err(msg) => {
|
|
if msg == "quarantined" || msg == "gated" {
|
|
Ok(quarantine(&req, sub, &msg))
|
|
} else {
|
|
error(req, &msg).await
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
pub async fn sidebar(req: Request<Body>) -> Result<Response<Body>, String> {
|
|
let sub = req.param("sub").unwrap_or_else(|| "reddit.com".to_string());
|
|
let quarantined = can_access_quarantine(&req, &sub);
|
|
|
|
// Handle random subreddits
|
|
if let Ok(random) = catch_random(&sub, "/about/sidebar").await {
|
|
return Ok(random);
|
|
}
|
|
|
|
// Build the Reddit JSON API url
|
|
let path: String = format!("/r/{sub}/about.json?raw_json=1");
|
|
let url = req.uri().to_string();
|
|
|
|
// Send a request to the url
|
|
match json(path, quarantined).await {
|
|
// If success, receive JSON in response
|
|
Ok(response) => Ok(template(&WikiTemplate {
|
|
wiki: rewrite_urls(&val(&response, "description_html")),
|
|
// wiki: format!(
|
|
// "{}<hr><h1>Moderators</h1><br><ul>{}</ul>",
|
|
// rewrite_urls(&val(&response, "description_html"),
|
|
// moderators(&sub, quarantined).await.unwrap_or(vec!["Could not fetch moderators".to_string()]).join(""),
|
|
// ),
|
|
sub,
|
|
page: "Sidebar".to_string(),
|
|
prefs: Preferences::new(&req),
|
|
url,
|
|
})),
|
|
Err(msg) => {
|
|
if msg == "quarantined" || msg == "gated" {
|
|
Ok(quarantine(&req, sub, &msg))
|
|
} else {
|
|
error(req, &msg).await
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// pub async fn moderators(sub: &str, quarantined: bool) -> Result<Vec<String>, String> {
|
|
// // Retrieve and format the html for the moderators list
|
|
// Ok(
|
|
// moderators_list(sub, quarantined)
|
|
// .await?
|
|
// .iter()
|
|
// .map(|m| format!("<li><a style=\"color: var(--accent)\" href=\"/u/{name}\">{name}</a></li>", name = m))
|
|
// .collect(),
|
|
// )
|
|
// }
|
|
|
|
// async fn moderators_list(sub: &str, quarantined: bool) -> Result<Vec<String>, String> {
|
|
// // Build the moderator list URL
|
|
// let path: String = format!("/r/{}/about/moderators.json?raw_json=1", sub);
|
|
|
|
// // Retrieve response
|
|
// json(path, quarantined).await.map(|response| {
|
|
// // Traverse json tree and format into list of strings
|
|
// response["data"]["children"]
|
|
// .as_array()
|
|
// .unwrap_or(&Vec::new())
|
|
// .iter()
|
|
// .filter_map(|moderator| {
|
|
// let name = moderator["name"].as_str().unwrap_or_default();
|
|
// if name.is_empty() {
|
|
// None
|
|
// } else {
|
|
// Some(name.to_string())
|
|
// }
|
|
// })
|
|
// .collect::<Vec<_>>()
|
|
// })
|
|
// }
|
|
|
|
// SUBREDDIT
|
|
async fn subreddit(sub: &str, quarantined: bool) -> Result<Subreddit, String> {
|
|
// Build the Reddit JSON API url
|
|
let path: String = format!("/r/{sub}/about.json?raw_json=1");
|
|
|
|
// Send a request to the url
|
|
let res = json(path, quarantined).await?;
|
|
|
|
// Metadata regarding the subreddit
|
|
let members: i64 = res["data"]["subscribers"].as_u64().unwrap_or_default() as i64;
|
|
let active: i64 = res["data"]["accounts_active"].as_u64().unwrap_or_default() as i64;
|
|
|
|
// Fetch subreddit icon either from the community_icon or icon_img value
|
|
let community_icon: &str = res["data"]["community_icon"].as_str().unwrap_or_default();
|
|
let icon = if community_icon.is_empty() { val(&res, "icon_img") } else { community_icon.to_string() };
|
|
|
|
Ok(Subreddit {
|
|
name: val(&res, "display_name"),
|
|
title: val(&res, "title"),
|
|
description: val(&res, "public_description"),
|
|
info: rewrite_urls(&val(&res, "description_html")),
|
|
// moderators: moderators_list(sub, quarantined).await.unwrap_or_default(),
|
|
icon: format_url(&icon),
|
|
members: format_num(members),
|
|
active: format_num(active),
|
|
wiki: res["data"]["wiki_enabled"].as_bool().unwrap_or_default(),
|
|
nsfw: res["data"]["over18"].as_bool().unwrap_or_default(),
|
|
})
|
|
}
|
|
|
|
pub async fn rss(req: Request<Body>) -> Result<Response<Body>, String> {
|
|
if config::get_setting("REDLIB_ENABLE_RSS").is_none() {
|
|
return Ok(error(req, "RSS is disabled on this instance.").await.unwrap_or_default());
|
|
}
|
|
|
|
use hyper::header::CONTENT_TYPE;
|
|
use rss::{ChannelBuilder, Item};
|
|
|
|
// Get subreddit
|
|
let sub = req.param("sub").unwrap_or_default();
|
|
let post_sort = req.cookie("post_sort").map_or_else(|| "hot".to_string(), |c| c.value().to_string());
|
|
let sort = req.param("sort").unwrap_or_else(|| req.param("id").unwrap_or(post_sort));
|
|
|
|
// Get path
|
|
let path = format!("/r/{sub}/{sort}.json?{}", req.uri().query().unwrap_or_default());
|
|
|
|
// Get subreddit data
|
|
let subreddit = subreddit(&sub, false).await?;
|
|
|
|
// Get posts
|
|
let (posts, _) = Post::fetch(&path, false).await?;
|
|
|
|
// Build the RSS feed
|
|
let channel = ChannelBuilder::default()
|
|
.title(&subreddit.title)
|
|
.description(&subreddit.description)
|
|
.items(
|
|
posts
|
|
.into_iter()
|
|
.map(|post| Item {
|
|
title: Some(post.title.to_string()),
|
|
link: Some(format_url(&utils::get_post_url(&post))),
|
|
author: Some(post.author.name),
|
|
content: Some(rewrite_urls(&post.body)),
|
|
pub_date: Some(DateTime::from_timestamp(post.created_ts as i64, 0).unwrap_or_default().to_rfc2822()),
|
|
description: Some(format!(
|
|
"<a href='{}{}'>Comments</a>",
|
|
config::get_setting("REDLIB_FULL_URL").unwrap_or_default(),
|
|
post.permalink
|
|
)),
|
|
..Default::default()
|
|
})
|
|
.collect::<Vec<_>>(),
|
|
)
|
|
.build();
|
|
|
|
// Serialize the feed to RSS
|
|
let body = channel.to_string().into_bytes();
|
|
|
|
// Create the HTTP response
|
|
let mut res = Response::new(Body::from(body));
|
|
res.headers_mut().insert(CONTENT_TYPE, hyper::header::HeaderValue::from_static("application/rss+xml"));
|
|
|
|
Ok(res)
|
|
}
|
|
|
|
#[tokio::test(flavor = "multi_thread")]
|
|
async fn test_fetching_subreddit() {
|
|
let subreddit = subreddit("rust", false).await;
|
|
assert!(subreddit.is_ok());
|
|
}
|
|
|
|
#[tokio::test(flavor = "multi_thread")]
|
|
async fn test_gated_and_quarantined() {
|
|
let quarantined = subreddit("edgy", true).await;
|
|
assert!(quarantined.is_ok());
|
|
let gated = subreddit("drugs", true).await;
|
|
assert!(gated.is_ok());
|
|
}
|