feat(frontend): create structure of the CallGraph response

src/Module/Frontend/Module/Profiler/ApiController.php

@@ -32,7 +32,7 @@ trait ApiController
             ],
         ),
     ]
-    public function profilerTop(string $uuid, #[QueryParam] string $metric = ''): Message\TopFunctions
+    public function profilerTop(string $uuid, #[QueryParam] string $metric = 'wt'): Message\TopFunctions
     {
         $event = $this->eventsStorage->get($uuid) ?? throw new \RuntimeException('Event not found.');
 
@@ -66,7 +66,7 @@ public function profilerCallGraph(
         $event?->payload instanceof ProfilerPayload or throw new \RuntimeException('Invalid payload type.');
         /** @var Event<ProfilerPayload> $event */
 
-        return $this->mapper->callGraph($event);
+        return $this->mapper->callGraph($event, $threshold, $percentage, $metric);
     }
 
     #[RegexpRoute(Method::Get, '#^api/profiler/(?<uuid>[a-f0-9-]++)/flame-chart$#i')]

src/Module/Frontend/Module/Profiler/Mapper.php

@@ -4,6 +4,7 @@
 
 namespace Buggregator\Trap\Module\Frontend\Module\Profiler;
 
+use Buggregator\Trap\Handler\Router\Attribute\QueryParam;
 use Buggregator\Trap\Module\Frontend\Event;
 use Buggregator\Trap\Module\Frontend\Module\Profiler\Message\CallGraph;
 use Buggregator\Trap\Module\Frontend\Module\Profiler\Message\FlameChart;
@@ -122,9 +123,22 @@ functions: $top,
     /**
      * @param Event<ProfilerPayload> $event
      */
-    public function callGraph(Event $event): CallGraph
-    {
-        return new CallGraph();
+    public function callGraph(
+        Event $event,
+        float $threshold = 1,
+        float $percentage = 15,
+        string $metric = 'wt',
+    ): CallGraph {
+        return new CallGraph(
+            toolbar: new CallGraph\Toolbar([
+                new CallGraph\Button('CPU', 'cpu', 'CPU time (ms)'),
+                new CallGraph\Button('Wall time', 'wt', 'Wall time (ms)'),
+                new CallGraph\Button('Memory', 'mu', 'Memory usage (bytes)'),
+                new CallGraph\Button('Peak memory', 'pmu', 'Peak memory usage (bytes)'),
+            ]),
+            nodes: [],
+            edges: [],
+        );
     }
 
     /**

src/Module/Frontend/Module/Profiler/Message/CallGraph.php

@@ -9,11 +9,22 @@
  */
 final class CallGraph implements \JsonSerializable
 {
+    /**
+     * @param list<CallGraph\Node> $nodes
+     * @param list<CallGraph\Edge> $edges
+     */
     public function __construct(
+        private readonly CallGraph\Toolbar $toolbar,
+        private readonly array $nodes,
+        private readonly array $edges,
     ) {}
 
     public function jsonSerialize(): array
     {
-        return [];
+        return [
+            'toolbar' => $this->toolbar,
+            'nodes' => $this->nodes,
+            'edges' => $this->edges,
+        ];
     }
 }

src/Module/Frontend/Module/Profiler/Message/CallGraph/Button.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Buggregator\Trap\Module\Frontend\Module\Profiler\Message\CallGraph;
+
+/**
+ * @internal
+ */
+final class Button implements \JsonSerializable
+{
+    public function __construct(
+        public readonly string $label,
+        public readonly string $metric,
+        public readonly string $description,
+    ) {}
+
+    public function jsonSerialize(): array
+    {
+        return [
+            'label' => $this->label,
+            'metric' => $this->metric,
+            'description' => $this->description,
+        ];
+    }
+}

src/Module/Frontend/Module/Profiler/Message/CallGraph/Edge.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Buggregator\Trap\Module\Frontend\Module\Profiler\Message\CallGraph;
+
+/**
+ * @internal
+ */
+final class Edge implements \JsonSerializable
+{
+    public function __construct(
+        public readonly string $color,
+        public readonly string $label,
+        public readonly string $source,
+        public readonly string $target,
+    ) {}
+
+    public function jsonSerialize(): array
+    {
+        return [
+            'data' => [
+                'color' => $this->color,
+                'label' => $this->label,
+                'source' => $this->source,
+                'target' => $this->target,
+            ],
+        ];
+    }
+}

src/Module/Frontend/Module/Profiler/Message/CallGraph/Metrics.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Buggregator\Trap\Module\Frontend\Module\Profiler\Message\CallGraph;
+
+/**
+ * @internal
+ */
+final class Metrics implements \JsonSerializable
+{
+    public function __construct(
+        private readonly int $cost,
+        private readonly float $percents,
+    ) {}
+
+    public function jsonSerialize(): array
+    {
+        return [
+            'cost' => $this->cost,
+            'percents' => $this->percents,
+        ];
+    }
+}

src/Module/Frontend/Module/Profiler/Message/CallGraph/Node.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Buggregator\Trap\Module\Frontend\Module\Profiler\Message\CallGraph;
+
+use Buggregator\Trap\Module\Profiler\Struct\Cost;
+
+/**
+ * @internal
+ */
+final class Node implements \JsonSerializable
+{
+    public function __construct(
+        public readonly string $id,
+        public readonly string $name,
+        public readonly Cost $cost,
+        public readonly Metrics $metrics,
+        public readonly string $color,
+        public readonly string $textColor,
+    ) {}
+
+    public function jsonSerialize(): array
+    {
+        return [
+            'data' => [
+                'color' => $this->color,
+                'cost' => $this->cost,
+                'id' => $this->id,
+                'metrics' => $this->metrics,
+                'name' => $this->name,
+                'textColor' => $this->textColor,
+            ],
+        ];
+    }
+}

src/Module/Frontend/Module/Profiler/Message/CallGraph/Toolbar.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Buggregator\Trap\Module\Frontend\Module\Profiler\Message\CallGraph;
+
+/**
+ * @internal
+ */
+final class Toolbar implements \JsonSerializable
+{
+    /**
+     * @param list<Button> $buttons
+     */
+    public function __construct(
+        private array $buttons,
+    ) {}
+
+    public function jsonSerialize(): array
+    {
+        return $this->buttons;
+    }
+}