lemmy/server/src/routes/feeds.rs

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extern crate rss;
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use super::*;
use crate::db::comment_view::{ReplyQueryBuilder, ReplyView};
use crate::db::community::Community;
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use crate::db::post_view::{PostQueryBuilder, PostView};
use crate::db::site_view::SiteView;
use crate::db::user::{Claims, User_};
use crate::db::user_mention_view::{UserMentionQueryBuilder, UserMentionView};
use crate::db::{establish_connection, ListingType, SortType};
use crate::Settings;
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use actix_web::body::Body;
use actix_web::{web, HttpResponse, Result};
use chrono::{DateTime, Utc};
use failure::Error;
use rss::{CategoryBuilder, ChannelBuilder, GuidBuilder, Item, ItemBuilder};
use serde::Deserialize;
use std::str::FromStr;
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use strum::ParseError;
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#[derive(Deserialize)]
pub struct Params {
sort: Option<String>,
}
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enum RequestType {
Community,
User,
Front,
Inbox,
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}
pub fn config(cfg: &mut web::ServiceConfig) {
cfg
.route("/feeds/{type}/{name}.xml", web::get().to(feeds::get_feed))
.route("/feeds/all.xml", web::get().to(feeds::get_all_feed))
.route("/feeds/all.xml", web::get().to(feeds::get_all_feed));
}
fn get_all_feed(info: web::Query<Params>) -> HttpResponse<Body> {
let sort_type = match get_sort_type(info) {
Ok(sort_type) => sort_type,
Err(_) => return HttpResponse::BadRequest().finish(),
};
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let feed_result = get_feed_all_data(&sort_type);
match feed_result {
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Ok(rss) => HttpResponse::Ok()
.content_type("application/rss+xml")
.body(rss),
Err(_) => HttpResponse::NotFound().finish(),
}
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}
fn get_feed(path: web::Path<(String, String)>, info: web::Query<Params>) -> HttpResponse<Body> {
let sort_type = match get_sort_type(info) {
Ok(sort_type) => sort_type,
Err(_) => return HttpResponse::BadRequest().finish(),
};
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let request_type = match path.0.as_ref() {
"u" => RequestType::User,
"c" => RequestType::Community,
"front" => RequestType::Front,
"inbox" => RequestType::Inbox,
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_ => return HttpResponse::NotFound().finish(),
};
let param = path.1.to_owned();
let feed_result = match request_type {
RequestType::User => get_feed_user(&sort_type, param),
RequestType::Community => get_feed_community(&sort_type, param),
RequestType::Front => get_feed_front(&sort_type, param),
RequestType::Inbox => get_feed_inbox(param),
};
match feed_result {
Ok(rss) => HttpResponse::Ok()
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.content_type("application/rss+xml")
.body(rss),
Err(_) => HttpResponse::NotFound().finish(),
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}
}
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fn get_sort_type(info: web::Query<Params>) -> Result<SortType, ParseError> {
let sort_query = info
.sort
.to_owned()
.unwrap_or_else(|| SortType::Hot.to_string());
SortType::from_str(&sort_query)
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}
fn get_feed_all_data(sort_type: &SortType) -> Result<String, Error> {
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let conn = establish_connection();
let site_view = SiteView::read(&conn)?;
let posts = PostQueryBuilder::create(&conn)
.listing_type(ListingType::All)
.sort(sort_type)
.list()?;
let items = create_post_items(posts);
let mut channel_builder = ChannelBuilder::default();
channel_builder
.title(&format!("{} - All", site_view.name))
.link(format!("https://{}", Settings::get().hostname))
.items(items);
if let Some(site_desc) = site_view.description {
channel_builder.description(&site_desc);
}
Ok(channel_builder.build().unwrap().to_string())
}
fn get_feed_user(sort_type: &SortType, user_name: String) -> Result<String, Error> {
let conn = establish_connection();
let site_view = SiteView::read(&conn)?;
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let user = User_::find_by_username(&conn, &user_name)?;
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let user_url = user.get_profile_url();
let posts = PostQueryBuilder::create(&conn)
.listing_type(ListingType::All)
.sort(sort_type)
.for_creator_id(user.id)
.list()?;
let items = create_post_items(posts);
let mut channel_builder = ChannelBuilder::default();
channel_builder
.title(&format!("{} - {}", site_view.name, user.name))
.link(user_url)
.items(items);
Ok(channel_builder.build().unwrap().to_string())
}
fn get_feed_community(sort_type: &SortType, community_name: String) -> Result<String, Error> {
let conn = establish_connection();
let site_view = SiteView::read(&conn)?;
let community = Community::read_from_name(&conn, community_name)?;
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let community_url = community.get_url();
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let posts = PostQueryBuilder::create(&conn)
.listing_type(ListingType::All)
.sort(sort_type)
.for_community_id(community.id)
.list()?;
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let items = create_post_items(posts);
let mut channel_builder = ChannelBuilder::default();
channel_builder
.title(&format!("{} - {}", site_view.name, community.name))
.link(community_url)
.items(items);
if let Some(community_desc) = community.description {
channel_builder.description(&community_desc);
}
Ok(channel_builder.build().unwrap().to_string())
}
fn get_feed_front(sort_type: &SortType, jwt: String) -> Result<String, Error> {
let conn = establish_connection();
let site_view = SiteView::read(&conn)?;
let user_id = Claims::decode(&jwt)?.claims.id;
let posts = PostQueryBuilder::create(&conn)
.listing_type(ListingType::Subscribed)
.sort(sort_type)
.my_user_id(user_id)
.list()?;
let items = create_post_items(posts);
let mut channel_builder = ChannelBuilder::default();
channel_builder
.title(&format!("{} - Subscribed", site_view.name))
.link(format!("https://{}", Settings::get().hostname))
.items(items);
if let Some(site_desc) = site_view.description {
channel_builder.description(&site_desc);
}
Ok(channel_builder.build().unwrap().to_string())
}
fn get_feed_inbox(jwt: String) -> Result<String, Error> {
let conn = establish_connection();
let site_view = SiteView::read(&conn)?;
let user_id = Claims::decode(&jwt)?.claims.id;
let sort = SortType::New;
let replies = ReplyQueryBuilder::create(&conn, user_id)
.sort(&sort)
.list()?;
let mentions = UserMentionQueryBuilder::create(&conn, user_id)
.sort(&sort)
.list()?;
let items = create_reply_and_mention_items(replies, mentions);
let mut channel_builder = ChannelBuilder::default();
channel_builder
.title(&format!("{} - Inbox", site_view.name))
.link(format!("https://{}/inbox", Settings::get().hostname))
.items(items);
if let Some(site_desc) = site_view.description {
channel_builder.description(&site_desc);
}
Ok(channel_builder.build().unwrap().to_string())
}
fn create_reply_and_mention_items(
replies: Vec<ReplyView>,
mentions: Vec<UserMentionView>,
) -> Vec<Item> {
let mut items: Vec<Item> = Vec::new();
for r in replies {
let mut i = ItemBuilder::default();
i.title(format!("Reply from {}", r.creator_name));
let author_url = format!("https://{}/u/{}", Settings::get().hostname, r.creator_name);
i.author(format!(
"/u/{} <a href=\"{}\">(link)</a>",
r.creator_name, author_url
));
let dt = DateTime::<Utc>::from_utc(r.published, Utc);
i.pub_date(dt.to_rfc2822());
let reply_url = format!(
"https://{}/post/{}/comment/{}",
Settings::get().hostname,
r.post_id,
r.id
);
i.comments(reply_url.to_owned());
let guid = GuidBuilder::default()
.permalink(true)
.value(&reply_url)
.build();
i.guid(guid.unwrap());
i.link(reply_url);
// TODO find a markdown to html parser here, do images, etc
i.description(r.content);
items.push(i.build().unwrap());
}
for m in mentions {
let mut i = ItemBuilder::default();
i.title(format!("Mention from {}", m.creator_name));
let author_url = format!("https://{}/u/{}", Settings::get().hostname, m.creator_name);
i.author(format!(
"/u/{} <a href=\"{}\">(link)</a>",
m.creator_name, author_url
));
let dt = DateTime::<Utc>::from_utc(m.published, Utc);
i.pub_date(dt.to_rfc2822());
let mention_url = format!(
"https://{}/post/{}/comment/{}",
Settings::get().hostname,
m.post_id,
m.id
);
i.comments(mention_url.to_owned());
let guid = GuidBuilder::default()
.permalink(true)
.value(&mention_url)
.build();
i.guid(guid.unwrap());
i.link(mention_url);
// TODO find a markdown to html parser here, do images, etc
i.description(m.content);
items.push(i.build().unwrap());
}
items
}
fn create_post_items(posts: Vec<PostView>) -> Vec<Item> {
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let mut items: Vec<Item> = Vec::new();
for p in posts {
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let mut i = ItemBuilder::default();
i.title(p.name);
let author_url = format!("https://{}/u/{}", Settings::get().hostname, p.creator_name);
i.author(format!(
"/u/{} <a href=\"{}\">(link)</a>",
p.creator_name, author_url
));
let dt = DateTime::<Utc>::from_utc(p.published, Utc);
i.pub_date(dt.to_rfc2822());
let post_url = format!("https://{}/post/{}", Settings::get().hostname, p.id);
i.comments(post_url.to_owned());
let guid = GuidBuilder::default()
.permalink(true)
.value(&post_url)
.build();
i.guid(guid.unwrap());
let community_url = format!(
"https://{}/c/{}",
Settings::get().hostname,
p.community_name
);
let category = CategoryBuilder::default()
.name(format!(
"/c/{} <a href=\"{}\">(link)</a>",
p.community_name, community_url
))
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.domain(Settings::get().hostname.to_owned())
.build();
i.categories(vec![category.unwrap()]);
if let Some(url) = p.url {
i.link(url);
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}
// TODO find a markdown to html parser here, do images, etc
let mut description = format!("
submitted by <a href=\"{}\">{}</a> to <a href=\"{}\">{}</a><br>{} points | <a href=\"{}\">{} comments</a>",
author_url,
p.creator_name,
community_url,
p.community_name,
p.score,
post_url,
p.number_of_comments);
if let Some(body) = p.body {
description.push_str(&format!("<br><br>{}", body));
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}
i.description(description);
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items.push(i.build().unwrap());
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}
items
}