now possible to delete session tracks by hovering and pressing delete…

… key

db/procedures/delete_session_track.sql

@@ -0,0 +1,17 @@
+create or replace procedure delete_session_track (
+    in in_user_name  varchar(32),
+    in in_num        int
+)
+language plpgsql
+as $$
+begin
+    delete from "session_track"
+          where "user_name" = in_user_name
+            and "num" = in_num;
+
+    update "session_track"
+       set "num" = "num" - 1
+     where "user_name" = in_user_name
+       and "num" > in_num;
+end;
+$$;

html/main.js

@@ -414,7 +414,19 @@ document.addEventListener('click', event => {
 });
 
 document.addEventListener('keyup', event => {
+    const Del = 46;
     const A = 65;
+    let playlist = document.querySelector('#playlist ul');
+    if (event.which === Del && !playlist.classList.contains('is-deleting-track')) {
+        let hovered = playlist.querySelector('li:hover');
+        if (hovered !== null) {
+            playlist.classList.add('is-deleting-track');
+            ajaxPost('/form/delete-session-track', {
+                num: Array.from(playlist.children).indexOf(hovered) + 1
+            }, () => playlist.classList.remove('is-deleting-track'));
+            hovered.remove();
+        }
+    }
     if (event.ctrlKey && event.altKey && event.which == A) {
         ajaxPost('/form/toggle-edit-mode', {}, () => location.reload());
     }

src/route.h

@@ -48,6 +48,7 @@ void route_form_import(struct http_data* data);
 void route_form_upload(struct http_data* data);
 void route_form_add_group(struct http_data* data);
 void route_form_add_session_track(struct route_parameters* parameters);
+void route_form_delete_session_track(struct route_parameters* parameters);
 void route_form_add_group_tag(struct route_result* result, struct http_data* data);
 void route_form_delete_group_tag(struct route_result* result, struct http_data* data);
 

src/route_form.c

@@ -44,6 +44,8 @@ void route_form_with_session(const char* form, struct route_parameters* paramete
 		}
 	} else if (!strcmp(form, "add-session-track")) {
 		route_form_add_session_track(parameters);
+	} else if (!strcmp(form, "delete-session-track")) {
+		route_form_delete_session_track(parameters);
 	} else if (!strcmp(form, "download-remote")) {
 		if (has_privilege(parameters->session, PRIVILEGE_UPLOAD_ALBUM)) {
 			route_form_download_remote(&parameters->data);

src/route_form_add_session_track.c

@@ -51,3 +51,13 @@ void route_form_add_session_track(struct route_parameters* parameters) {
 	parameters->resource = resource;
 	route_render(parameters);
 }
+
+void route_form_delete_session_track(struct route_parameters* parameters) {
+	const char* num = http_data_string(&parameters->data, "num");
+	if (*num) {
+		const char* params[] = { parameters->session->name, num };
+		PQclear(call_procedure("call delete_session_track", params, 2));
+	} else {
+		print_error("Index must be specified when deleting a session track");
+	}
+}