From: Michael Tremer <michael.tremer@ipfire.org>
Date: Fri, 5 Jun 2026 15:10:06 +0000 (+0000)
Subject: graphs: Extend implemention to check if a graph can be rendered
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=024ffe3be7255a18f8e03f54ce507f74399e057a;p=telemetry.git

graphs: Extend implemention to check if a graph can be rendered

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/daemon/graph.c b/src/daemon/graph.c
index 9d7001b..51caa46 100644
--- a/src/daemon/graph.c
+++ b/src/daemon/graph.c
@@ -336,6 +336,13 @@ int td_graph_render(td_graph* self, const char* object,
 	if (!self->impl->render)
 		return -ENOTSUP;
 
+	// Check if this can be rendered
+	if (self->impl->can_render) {
+		r = self->impl->can_render(self->ctx, self, options, object);
+		if (r < 0)
+			goto ERROR;
+	}
+
 	// Store the start time
 	t_start = clock();
 	if (t_start < 0) {
diff --git a/src/daemon/graph.h b/src/daemon/graph.h
index 5890dc6..0a86d84 100644
--- a/src/daemon/graph.h
+++ b/src/daemon/graph.h
@@ -72,6 +72,10 @@ typedef struct td_graph_impl {
 	// Available
 	int (*available)(td_ctx* ctx, td_daemon* daemon);
 
+	// Can Render?
+	int (*can_render)(td_ctx* ctx, td_graph* graph,
+		const td_graph_render_options* options, const char* object);
+
 	// Render!
 	int (*render)(td_ctx* ctx, td_graph* graph, const td_graph_render_options* options,
 		td_args* args, const char* object);