clapdat: resolve tag/user names without prefix

src/providers/clapdat.rs

@@ -1,7 +1,8 @@
 use crate::DbPool;
 use crate::api::ClientVersion;
 use crate::providers::{
-    Provider, build_proxy_url, report_provider_error, requester_or_default, strip_url_scheme,
+    Provider, build_proxy_url, probe_first_archive, report_provider_error, requester_or_default,
+    slug_dashed, strip_url_scheme,
 };
 use crate::status::*;
 use crate::util::time::parse_time_to_seconds;
@@ -149,6 +150,29 @@ impl ClapdatProvider {
         }
     }
 
+    /// A free-form query that names a tag or a user goes to that archive
+    /// (probed on the site; unknown names 404), else keyword search.
+    async fn resolve_keyword(&self, query: &str, options: &ServerOptions) -> Option<Target> {
+        let slug = slug_dashed(query);
+        if slug.is_empty() {
+            return None;
+        }
+        let candidates = [
+            Target::Tag { slug: slug.clone() },
+            Target::User { username: slug },
+        ];
+        let urls: Vec<String> = candidates
+            .iter()
+            .filter_map(|t| self.listing_url(t, 1))
+            .collect();
+        let mut requester = requester_or_default(options, CHANNEL_ID, "resolve_keyword");
+        let (index, _) = probe_first_archive(&mut requester, &urls, &format!("{}/", self.url), |body| {
+            body.contains("/video/")
+        })
+        .await?;
+        candidates.into_iter().nth(index)
+    }
+
     fn listing_url(&self, target: &Target, page: u16) -> Option<String> {
         let page = page.max(1);
         match target {
@@ -491,7 +515,12 @@ impl Provider for ClapdatProvider {
             sort
         };
         let query_value = query.unwrap_or_default();
-        let target = self.resolve_target(&query_value, &sort_value);
+        let mut target = self.resolve_target(&query_value, &sort_value);
+        if let Target::Search { query } = &target {
+            if let Some(found) = self.resolve_keyword(query, &options).await {
+                target = found;
+            }
+        }
 
         let stubs = match &target {
             Target::Search { query } => match self