34 lines
1.3 KiB
Rust
34 lines
1.3 KiB
Rust
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use anyhow::Result;
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use feedsignal_db::Db;
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use uuid::Uuid;
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/// Subscribes to a feed by URL: registers it (or updates its title if
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/// already subscribed) and does an immediate first fetch so the reader
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/// isn't empty until the next scheduled poll. Returns the number of
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/// articles pulled in on this fetch.
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///
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/// Fetches under a throwaway id before writing anything, so there's exactly
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/// one write to the `feeds` table (`upsert_feed` is the single source of
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/// truth for the real id — the existing one on a re-subscribe, a fresh one
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/// otherwise) and no half-registered row left behind if the fetch fails
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/// (e.g. the URL is well-formed but points at nothing, or the feed no
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/// longer exists — `fetch_feed` surfaces both as an `Err` via
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/// `error_for_status`/feed-rs parse failure, which becomes the error
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/// message shown in the subscribe form).
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pub async fn subscribe(db: Db, url: String) -> Result<usize> {
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anyhow::ensure!(!url.trim().is_empty(), "feed URL is required");
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let url = url.trim();
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let (title, mut articles) = feedsignal_feeds::fetch_feed(url, Uuid::new_v4()).await?;
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let feed_id = db.upsert_feed(url, &title).await?;
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for article in &mut articles {
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article.feed_id = feed_id;
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}
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let count = articles.len();
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for article in &articles {
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db.insert_article(article).await?;
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}
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Ok(count)
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}
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