init

backend/src/fetch/mod.rs

@@ -0,0 +1,39 @@
+//! Product data adapters. The deal source is a user-pasted product URL — no
+//! per-retailer scrapers. Adapters are generic platform readers; the first is
+//! Shopify, whose storefronts expose a public `/products/{handle}.json` document.
+
+use rust_decimal::Decimal;
+
+mod shopify;
+
+/// Normalised product snapshot produced by an adapter.
+#[derive(Debug, Clone)]
+pub struct FetchedProduct {
+    pub title: String,
+    pub price: Decimal,
+    pub currency: String,
+    pub image_url: Option<String>,
+    pub in_stock: Option<bool>,
+    pub source: &'static str,
+}
+
+/// A shared HTTP client tuned for storefront fetches.
+pub fn http_client() -> reqwest::Client {
+    reqwest::Client::builder()
+        .user_agent("consumers-bot/0.1 (+self-hosted wantlist price watcher)")
+        .timeout(std::time::Duration::from_secs(15))
+        .build()
+        .expect("failed to build reqwest client")
+}
+
+/// Try every adapter in turn. Returns the first that recognises the URL.
+pub async fn fetch_product(
+    client: &reqwest::Client,
+    url: &str,
+    default_currency: &str,
+) -> anyhow::Result<FetchedProduct> {
+    if let Some(p) = shopify::fetch(client, url, default_currency).await? {
+        return Ok(p);
+    }
+    anyhow::bail!("no adapter could read this URL (only Shopify storefronts are supported for now)")
+}