porn4fans: resolve model/tag names without prefix

src/providers/porn4fans.rs

@@ -2,6 +2,7 @@ use crate::DbPool;
 use crate::api::ClientVersion;
 use crate::providers::{
     Provider, report_provider_error, report_provider_error_background, requester_or_default,
+    probe_first_archive,
 };
 use crate::status::*;
 use crate::util::cache::VideoCache;
@@ -260,6 +261,34 @@ impl Porn4fansProvider {
         Target::Latest
     }
 
+    /// A free-form query that names a model or a tag 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 = Self::slugify(query);
+        if slug.is_empty() {
+            return None;
+        }
+        let candidates = [
+            Target::Model { slug: slug.clone() },
+            Target::Tag { slug },
+        ];
+        let urls: Vec<String> = candidates
+            .iter()
+            .map(|t| match t {
+                Target::Model { slug } => format!("{}/models/{slug}/", self.url),
+                Target::Tag { slug } => format!("{}/tags/{slug}/", self.url),
+                _ => String::new(),
+            })
+            .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("custom_list_videos")
+            })
+            .await?;
+        candidates.into_iter().nth(index)
+    }
+
     /// Build the async `get_block` URL plus the Referer to send with it.
     fn build_block_url(&self, target: &Target, sort: &str, page: u32) -> (String, String) {
         let sort_by = Self::sort_by(sort);
@@ -788,7 +817,12 @@ impl Provider for Porn4fansProvider {
         options: ServerOptions,
     ) -> Vec<VideoItem> {
         let page = page.parse::<u32>().unwrap_or(1).max(1);
-        let target = self.target_from_request(query.as_deref(), options.categories.as_deref());
+        let mut target = self.target_from_request(query.as_deref(), options.categories.as_deref());
+        if let Target::Search { query } = &target {
+            if let Some(found) = self.resolve_keyword(query, &options).await {
+                target = found;
+            }
+        }
 
         match self
             .get_videos_for_target(cache, &target, &sort, page, options)