mirror of https://github.com/spikecodes/libreddit
254 lines
8.4 KiB
Rust
254 lines
8.4 KiB
Rust
// CRATES
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use crate::client::json;
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use crate::config::get_setting;
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use crate::server::RequestExt;
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use crate::subreddit::{can_access_quarantine, quarantine};
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use crate::utils::{
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error, format_num, get_filters, nsfw_landing, param, parse_post, rewrite_urls, setting, template, time, val, Author, Awards, Comment, Flair, FlairPart, Post, Preferences,
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};
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use hyper::{Body, Request, Response};
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use askama::Template;
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use once_cell::sync::Lazy;
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use regex::Regex;
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use std::collections::HashSet;
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// STRUCTS
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#[derive(Template)]
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#[template(path = "post.html")]
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struct PostTemplate {
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comments: Vec<Comment>,
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post: Post,
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sort: String,
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prefs: Preferences,
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single_thread: bool,
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url: String,
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url_without_query: String,
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comment_query: String,
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}
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static COMMENT_SEARCH_CAPTURE: Lazy<Regex> = Lazy::new(|| Regex::new(r#"\?q=(.*)&type=comment"#).unwrap());
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pub async fn item(req: Request<Body>) -> Result<Response<Body>, String> {
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// Build Reddit API path
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let mut path: String = format!("{}.json?{}&raw_json=1", req.uri().path(), req.uri().query().unwrap_or_default());
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let sub = req.param("sub").unwrap_or_default();
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let quarantined = can_access_quarantine(&req, &sub);
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let url = req.uri().to_string();
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// Set sort to sort query parameter
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let sort = param(&path, "sort").unwrap_or_else(|| {
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// Grab default comment sort method from Cookies
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let default_sort = setting(&req, "comment_sort");
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// If there's no sort query but there's a default sort, set sort to default_sort
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if default_sort.is_empty() {
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String::new()
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} else {
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path = format!("{}.json?{}&sort={}&raw_json=1", req.uri().path(), req.uri().query().unwrap_or_default(), default_sort);
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default_sort
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}
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});
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// Log the post ID being fetched in debug mode
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#[cfg(debug_assertions)]
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dbg!(req.param("id").unwrap_or_default());
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let single_thread = req.param("comment_id").is_some();
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let highlighted_comment = &req.param("comment_id").unwrap_or_default();
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// Send a request to the url, receive JSON in response
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match json(path, quarantined).await {
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// Otherwise, grab the JSON output from the request
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Ok(response) => {
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// Parse the JSON into Post and Comment structs
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let post = parse_post(&response[0]["data"]["children"][0]).await;
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let req_url = req.uri().to_string();
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// Return landing page if this post if this Reddit deems this post
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// NSFW, but we have also disabled the display of NSFW content
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// or if the instance is SFW-only.
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if post.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 query = match COMMENT_SEARCH_CAPTURE.captures(&url) {
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Some(captures) => captures.get(1).unwrap().as_str().replace("%20", " ").replace('+', " "),
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None => String::new(),
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};
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let comments = match query.as_str() {
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"" => parse_comments(&response[1], &post.permalink, &post.author.name, highlighted_comment, &get_filters(&req), &req),
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_ => query_comments(&response[1], &post.permalink, &post.author.name, highlighted_comment, &get_filters(&req), &query, &req),
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};
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// Use the Post and Comment structs to generate a website to show users
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template(PostTemplate {
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comments,
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post,
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url_without_query: url.clone().trim_end_matches(&format!("?q={query}&type=comment")).to_string(),
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sort,
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prefs: Preferences::new(&req),
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single_thread,
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url: req_url,
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comment_query: query,
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})
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}
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// If the Reddit API returns an error, exit and send error page to user
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Err(msg) => {
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if msg == "quarantined" || msg == "gated" {
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let sub = req.param("sub").unwrap_or_default();
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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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// COMMENTS
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fn parse_comments(json: &serde_json::Value, post_link: &str, post_author: &str, highlighted_comment: &str, filters: &HashSet<String>, req: &Request<Body>) -> Vec<Comment> {
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// Parse the comment JSON into a Vector of Comments
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let comments = json["data"]["children"].as_array().map_or(Vec::new(), std::borrow::ToOwned::to_owned);
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// For each comment, retrieve the values to build a Comment object
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comments
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.into_iter()
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.map(|comment| {
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let data = &comment["data"];
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let replies: Vec<Comment> = if data["replies"].is_object() {
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parse_comments(&data["replies"], post_link, post_author, highlighted_comment, filters, req)
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} else {
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Vec::new()
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};
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build_comment(&comment, data, replies, post_link, post_author, highlighted_comment, filters, req)
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})
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.collect()
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}
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fn query_comments(
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json: &serde_json::Value,
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post_link: &str,
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post_author: &str,
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highlighted_comment: &str,
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filters: &HashSet<String>,
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query: &str,
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req: &Request<Body>,
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) -> Vec<Comment> {
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let comments = json["data"]["children"].as_array().map_or(Vec::new(), std::borrow::ToOwned::to_owned);
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let mut results = Vec::new();
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comments.into_iter().for_each(|comment| {
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let data = &comment["data"];
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// If this comment contains replies, handle those too
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if data["replies"].is_object() {
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results.append(&mut query_comments(&data["replies"], post_link, post_author, highlighted_comment, filters, query, req))
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}
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let c = build_comment(&comment, data, Vec::new(), post_link, post_author, highlighted_comment, filters, req);
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if c.body.to_lowercase().contains(&query.to_lowercase()) {
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results.push(c);
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}
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});
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results
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}
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#[allow(clippy::too_many_arguments)]
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fn build_comment(
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comment: &serde_json::Value,
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data: &serde_json::Value,
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replies: Vec<Comment>,
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post_link: &str,
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post_author: &str,
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highlighted_comment: &str,
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filters: &HashSet<String>,
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req: &Request<Body>,
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) -> Comment {
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let id = val(comment, "id");
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let body = if (val(comment, "author") == "[deleted]" && val(comment, "body") == "[removed]") || val(comment, "body") == "[ Removed by Reddit ]" {
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format!(
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"<div class=\"md\"><p>[removed] — <a href=\"https://{}{}{}\">view removed comment</a></p></div>",
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get_setting("LIBREDDIT_PUSHSHIFT_FRONTEND").unwrap_or(String::from(crate::config::DEFAULT_PUSHSHIFT_FRONTEND)),
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post_link,
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id
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)
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} else {
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rewrite_urls(&val(comment, "body_html"))
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};
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let kind = comment["kind"].as_str().unwrap_or_default().to_string();
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let unix_time = data["created_utc"].as_f64().unwrap_or_default();
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let (rel_time, created) = time(unix_time);
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let edited = data["edited"].as_f64().map_or((String::new(), String::new()), time);
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let score = data["score"].as_i64().unwrap_or(0);
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// The JSON API only provides comments up to some threshold.
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// Further comments have to be loaded by subsequent requests.
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// The "kind" value will be "more" and the "count"
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// shows how many more (sub-)comments exist in the respective nesting level.
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// Note that in certain (seemingly random) cases, the count is simply wrong.
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let more_count = data["count"].as_i64().unwrap_or_default();
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let awards: Awards = Awards::parse(&data["all_awardings"]);
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let parent_kind_and_id = val(comment, "parent_id");
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let parent_info = parent_kind_and_id.split('_').collect::<Vec<&str>>();
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let highlighted = id == highlighted_comment;
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let author = Author {
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name: val(comment, "author"),
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flair: Flair {
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flair_parts: FlairPart::parse(
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data["author_flair_type"].as_str().unwrap_or_default(),
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data["author_flair_richtext"].as_array(),
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data["author_flair_text"].as_str(),
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),
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text: val(comment, "link_flair_text"),
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background_color: val(comment, "author_flair_background_color"),
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foreground_color: val(comment, "author_flair_text_color"),
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},
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distinguished: val(comment, "distinguished"),
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};
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let is_filtered = filters.contains(&["u_", author.name.as_str()].concat());
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// Many subreddits have a default comment posted about the sub's rules etc.
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// Many libreddit users do not wish to see this kind of comment by default.
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// Reddit does not tell us which users are "bots", so a good heuristic is to
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// collapse stickied moderator comments.
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let is_moderator_comment = data["distinguished"].as_str().unwrap_or_default() == "moderator";
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let is_stickied = data["stickied"].as_bool().unwrap_or_default();
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let collapsed = (is_moderator_comment && is_stickied) || is_filtered;
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Comment {
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id,
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kind,
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parent_id: parent_info[1].to_string(),
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parent_kind: parent_info[0].to_string(),
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post_link: post_link.to_string(),
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post_author: post_author.to_string(),
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body,
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author,
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score: if data["score_hidden"].as_bool().unwrap_or_default() {
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("\u{2022}".to_string(), "Hidden".to_string())
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} else {
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format_num(score)
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},
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rel_time,
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created,
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edited,
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replies,
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highlighted,
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awards,
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collapsed,
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is_filtered,
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more_count,
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prefs: Preferences::new(req),
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}
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}
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