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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** @license For full copyright and license information, please see the LICENSE.md file. */ |
| 6 | |
| 7 | namespace App\Modules\Automation\Application\Service\Dag; |
| 8 | |
| 9 | defined('AMMONLY_APP') || exit('Direct script access is forbidden.'); |
| 10 | |
| 11 | use App\Modules\Automation\Domain\Model\Workflow; |
| 12 | |
| 13 | /** |
| 14 | * Workflow DAG Canvas Graph Parser and Node Traversal Utility. |
| 15 | * |
| 16 | * Deserializes visual Drawflow graphs into structured node arrays and |
| 17 | * determines branch connectivity sequences. |
| 18 | * |
| 19 | * @package App\Modules\Automation\Application\Service\Dag |
| 20 | */ |
| 21 | final readonly class WorkflowDagParser |
| 22 | { |
| 23 | public const string TRIGGER_PREFIX = 'trigger_'; |
| 24 | public const string TRIGGER_NAME = 'trigger'; |
| 25 | |
| 26 | /** |
| 27 | * Parses graph nodes from workflow definition. |
| 28 | * |
| 29 | * @param Workflow $workflow Target workflow. |
| 30 | * @return array<string, array<string, mixed>> Indexed nodes array. |
| 31 | */ |
| 32 | public function parseGraphNodes(Workflow $workflow): array |
| 33 | { |
| 34 | $raw = $workflow->compiledFlow ?? $workflow->graphData; |
| 35 | if ($raw === null || trim($raw) === '') { |
| 36 | return []; |
| 37 | } |
| 38 | |
| 39 | return $this->extractNodesFromJson((string) $raw); |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * Decodes and extracts nodes array from raw JSON. |
| 44 | * |
| 45 | * @param string $raw JSON payload. |
| 46 | * @return array<string, array<string, mixed>> |
| 47 | */ |
| 48 | public function extractNodesFromJson(string $raw): array |
| 49 | { |
| 50 | $decoded = json_decode($raw, true); |
| 51 | if (!is_array($decoded)) { |
| 52 | return []; |
| 53 | } |
| 54 | |
| 55 | $homeData = $decoded['drawflow']['Home']['data'] ?? null; |
| 56 | if (is_array($homeData)) { |
| 57 | return $homeData; |
| 58 | } |
| 59 | |
| 60 | return isset($decoded['nodes']) && is_array($decoded['nodes']) ? $decoded['nodes'] : []; |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Finds the entrypoint trigger node in the graph. |
| 65 | * |
| 66 | * @param array<string, array<string, mixed>> $nodes Indexed nodes array. |
| 67 | * @return string|null ID of trigger node or first node. |
| 68 | */ |
| 69 | public function findTriggerNodeId(array $nodes): ?string |
| 70 | { |
| 71 | foreach ($nodes as $id => $node) { |
| 72 | $name = (string) ($node['name'] ?? ''); |
| 73 | if (str_starts_with($name, self::TRIGGER_PREFIX) || $name === self::TRIGGER_NAME) { |
| 74 | return (string) $id; |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | $keys = array_keys($nodes); |
| 79 | return isset($keys[0]) ? (string) $keys[0] : null; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Enqueues unvisited connected nodes to the traversal queue. |
| 84 | * |
| 85 | * @param array<string, mixed> $node Current node definition. |
| 86 | * @param string $branchToFollow Output port branch key. |
| 87 | * @param array<string, bool> $visited Visited nodes map. |
| 88 | * @param list<string> $queue Active traversal queue reference. |
| 89 | */ |
| 90 | public function enqueueNextNodes( |
| 91 | array $node, |
| 92 | string $branchToFollow, |
| 93 | array $visited, |
| 94 | array &$queue |
| 95 | ): void { |
| 96 | $outputs = $node['outputs'] ?? []; |
| 97 | $connections = $outputs[$branchToFollow]['connections'] ?? null; |
| 98 | if (!is_array($connections)) { |
| 99 | return; |
| 100 | } |
| 101 | |
| 102 | foreach ($connections as $conn) { |
| 103 | $targetNode = (string) ($conn['node'] ?? ''); |
| 104 | if ($targetNode !== '' && !isset($visited[$targetNode])) { |
| 105 | $queue[] = $targetNode; |
| 106 | } |
| 107 | } |
| 108 | } |
| 109 | } |