Include which hash caused a match in hashes.

src/handlers.rs

@@ -203,7 +203,13 @@ pub async fn search_hashes(
 
     rate_limit!(&api_key, &db, image_limit, "image", hashes.len() as i16);
 
-    let mut results = image_query_sync(pool, tree, hashes.clone(), 10, None);
+    let mut results = image_query_sync(
+        pool,
+        tree,
+        hashes.clone(),
+        opts.distance.unwrap_or(10),
+        None,
+    );
     let mut matches = Vec::new();
 
     while let Some(r) = results.recv().await {
@@ -275,6 +281,7 @@ pub async fn search_file(
             site_info: Some(SiteInfo::FurAffinity(FurAffinityFile {
                 file_id: row.get("file_id"),
             })),
+            searched_hash: None,
         })
         .collect();
 

src/models.rs

@@ -130,7 +130,12 @@ pub fn image_query_sync(
                     LIMIT 1
                 ) tm ON hashes.twitter_id IS NOT NULL
                 WHERE hashes.id = $1", &[&item.id]).await;
-                let rows = query.map(|rows| extract_rows(rows, hash.as_deref()).into_iter().collect());
+                let rows = query.map(|rows| {
+                    extract_rows(rows, hash.as_deref()).into_iter().map(|mut file| {
+                        file.searched_hash = Some(query_hash);
+                        file
+                    }).collect()
+                });
                 tx.send(rows).await.unwrap();
             }
         }

src/types.rs

@@ -42,6 +42,9 @@ pub struct File {
     pub hash: Option<i64>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub distance: Option<u64>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub searched_hash: Option<i64>,
 }
 
 #[derive(Debug, Serialize)]
@@ -101,4 +104,5 @@ pub struct ErrorMessage {
 #[derive(Debug, Deserialize)]
 pub struct HashSearchOpts {
     pub hashes: String,
+    pub distance: Option<i64>,
 }

src/utils.rs

@@ -109,6 +109,7 @@ pub fn extract_rows<'a>(
                 .flatten(),
             artists: row.get("artists"),
             filename: row.get("filename"),
+            searched_hash: None,
         }
     })
 }