feat(wrtagweb): support optional parameter mbid in /op/{operation} (#191)

* make endpoint /op/{operation} accept optional parameter mbid

* Update README.md

---------

Co-authored-by: starfruit6000 <starfruit6000@tuta.com>
Co-authored-by: Senan Kelly <senan@senan.xyz>

Author: 3 people

README.md

@@ -167,7 +167,7 @@ flowchart LR
 
 ### API
 
-Jobs are added to the queue with an HTTP request like `POST <wrtag.host>/op/<copy|move>` with form value `path=<absolute path to directory>`. The form value can be an `application/x-www-form-urlencoded` form body, or URL query parameter.
+Jobs are added to the queue with an HTTP request like `POST <wrtag.host>/op/<copy|move|reflink>` with form value `path=<absolute path to directory>`. Optional form value `mbid=<musicbrainz release URL>` can be supplied if you know your release. Both of the form values can be `application/x-www-form-urlencoded` form bodies, or URL query parameters.
 
 Authentication is done via a HTTP Basic authentication password **without a username**. The password is configured with the `web-api-key` config option.
 

cmd/wrtagweb/main.go

@@ -308,11 +308,15 @@ func main() {
 			return
 		}
 		path = filepath.Clean(path)
+		useMBID := r.FormValue("mbid")
+		if strings.Contains(useMBID, "/") {
+			useMBID = filepath.Base(useMBID) // accept release URL
+		}
 
 		ctx := r.Context()
 
 		var job Job
-		if err := sqlb.ScanRow(ctx, db, &job, "insert into jobs (source_path, operation, time) values (?, ?, ?) returning *", path, operationStr, time.Now()); err != nil {
+		if err := sqlb.ScanRow(ctx, db, &job, "insert into jobs (source_path, operation, use_mbid, time) values (?, ?, ?, ?) returning *", path, operationStr, useMBID, time.Now()); err != nil {
 			http.Error(w, fmt.Sprintf("error saving job: %v", err), http.StatusInternalServerError)
 			return
 		}