libreddit/src/subreddit.rs

94 lines
2.8 KiB
Rust

// CRATES
use crate::utils::{fetch_posts, format_num, format_url, param, request, val, ErrorTemplate, Post, Subreddit};
use actix_web::{http::StatusCode, HttpRequest, HttpResponse, Result};
use askama::Template;
use std::convert::TryInto;
// STRUCTS
#[derive(Template)]
#[template(path = "subreddit.html", escape = "none")]
struct SubredditTemplate {
sub: Subreddit,
posts: Vec<Post>,
sort: (String, String),
ends: (String, String),
}
// SERVICES
// web::Path(sub): web::Path<String>, params: web::Query<Params>
pub async fn page(req: HttpRequest) -> Result<HttpResponse> {
let path = format!("{}.json?{}", req.path(), req.query_string());
let sub = req.match_info().get("sub").unwrap_or("popular").to_string();
let sort = req.match_info().get("sort").unwrap_or("hot").to_string();
let sub_result = if !&sub.contains("+") && sub != "popular" {
subreddit(&sub).await
} else {
Ok(Subreddit::default())
};
let posts = fetch_posts(path.clone(), String::new()).await;
if posts.is_err() {
let s = ErrorTemplate {
message: posts.err().unwrap().to_string(),
}
.render()
.unwrap();
Ok(HttpResponse::Ok().status(StatusCode::NOT_FOUND).content_type("text/html").body(s))
} else {
let sub = sub_result.unwrap_or(Subreddit::default());
let items = posts.unwrap();
let s = SubredditTemplate {
sub: sub,
posts: items.0,
sort: (sort, param(&path, "t").await),
ends: (param(&path, "after").await, items.1),
}
.render()
.unwrap();
Ok(HttpResponse::Ok().content_type("text/html").body(s))
}
}
// SUBREDDIT
async fn subreddit(sub: &String) -> Result<Subreddit, &'static str> {
// Build the Reddit JSON API url
let url: String = format!("r/{}/about.json?raw_json=1", sub);
// Send a request to the url, receive JSON in response
let req = request(url).await;
// If the Reddit API returns an error, exit this function
if req.is_err() {
return Err(req.err().unwrap());
}
// Otherwise, grab the JSON output from the request
let res = req.unwrap();
// Metadata regarding the subreddit
let members = res["data"]["subscribers"].as_u64().unwrap_or(0);
let active = res["data"]["accounts_active"].as_u64().unwrap_or(0);
// Fetch subreddit icon either from the community_icon or icon_img value
let community_icon: &str = res["data"]["community_icon"].as_str().unwrap_or("").split("?").collect::<Vec<&str>>()[0];
let icon = if community_icon.is_empty() {
val(&res, "icon_img").await
} else {
community_icon.to_string()
};
let sub = Subreddit {
name: val(&res, "display_name").await,
title: val(&res, "title").await,
description: val(&res, "public_description").await,
info: val(&res, "description_html").await.replace("\\", ""),
icon: format_url(icon).await,
members: format_num(members.try_into().unwrap_or(0)),
active: format_num(active.try_into().unwrap_or(0)),
};
Ok(sub)
}