modmapper/src/nexus_scraper.rs

127 lines
4.5 KiB
Rust

use anyhow::Result;
use reqwest::Client;
use scraper::{Html, Selector};
use tracing::{info, instrument};
use crate::nexus_api::GAME_ID;
pub struct ModListResponse {
html: Html,
}
pub struct ScrapedMod<'a> {
pub nexus_mod_id: i32,
pub name: &'a str,
pub category: &'a str,
pub author: &'a str,
pub desc: Option<&'a str>,
}
pub struct ModListScrape<'a> {
pub mods: Vec<ScrapedMod<'a>>,
pub has_next_page: bool,
}
#[instrument(skip(client))]
pub async fn get_mod_list_page(client: &Client, page: usize) -> Result<ModListResponse> {
let res = client
.get(format!(
"https://www.nexusmods.com/Core/Libs/Common/Widgets/ModList?RH_ModList=nav:true,home:false,type:0,user_id:0,game_id:{},advfilt:true,include_adult:true,page_size:80,show_game_filter:false,open:false,page:{},sort_by:OLD_u_downloads",
GAME_ID,
page
))
.send()
.await?
.error_for_status()?;
info!(status = %res.status(), "fetched mod list page");
let text = res.text().await?;
let html = Html::parse_document(&text);
Ok(ModListResponse { html })
}
impl ModListResponse {
#[instrument(skip(self))]
pub fn scrape_mods<'a>(&'a self) -> Result<ModListScrape> {
let mod_select = Selector::parse("li.mod-tile").expect("failed to parse CSS selector");
let left_select =
Selector::parse("div.mod-tile-left").expect("failed to parse CSS selector");
let right_select =
Selector::parse("div.mod-tile-right").expect("failed to parse CSS selector");
let name_select = Selector::parse("p.tile-name a").expect("failed to parse CSS selector");
let category_select =
Selector::parse("div.category a").expect("failed to parse CSS selector");
let author_select = Selector::parse("div.author a").expect("failed to parse CSS selector");
let desc_select = Selector::parse("p.desc").expect("failed to parse CSS selector");
let next_page_select =
Selector::parse("div.pagination li.next").expect("failed to parse CSS selector");
let next_page_elem = self.html.select(&next_page_select).next();
let has_next_page = next_page_elem.is_some();
let mods: Vec<ScrapedMod> = self
.html
.select(&mod_select)
.map(|element| {
let left = element
.select(&left_select)
.next()
.expect("Missing left div for mod");
let right = element
.select(&right_select)
.next()
.expect("Missing right div for mod");
let nexus_mod_id = left
.value()
.attr("data-mod-id")
.expect("Missing mod id attribute")
.parse::<i32>()
.ok()
.expect("Failed to parse mod id");
let name_elem = right
.select(&name_select)
.next()
.expect("Missing name link for mod");
let name = name_elem.text().next().expect("Missing name text for mod");
let category_elem = right
.select(&category_select)
.next()
.expect("Missing category link for mod");
let category = category_elem
.text()
.next()
.expect("Missing category text for mod");
let author_elem = right
.select(&author_select)
.next()
.expect("Missing author link for mod");
let author = author_elem
.text()
.next()
.expect("Missing author text for mod");
let desc_elem = right
.select(&desc_select)
.next()
.expect("Missing desc elem for mod");
let desc = desc_elem.text().next();
ScrapedMod {
nexus_mod_id,
name,
category,
author,
desc,
}
})
.collect();
info!(
len = mods.len(),
has_next_page, "scraped mods from mod list page"
);
Ok(ModListScrape {
mods,
has_next_page,
})
}
}