Function parseGraphXml

src/functions/graph.ts:378–451

(
  xml: string,
  observationIds: string[],
)

}

function parseGraphXml(
  xml: string,
  observationIds: string[],
): {
  nodes: GraphNode[];
  edges: GraphEdge[];
} {
  const nodes: GraphNode[] = [];
  const edges: GraphEdge[] = [];
  const now = new Date().toISOString();

  // Two passes because <entity> can be self-closing or have a body
  // (<property> children). The self-closing form needs `[^>]*[^/]` on
  // the attr group so the trailing `/` isn't swallowed into the match
  // (root cause of #494). The explicit-close form picks up the
  // property block.
  const entitySelfClose = /<entity\b([^>]*?)\/>/g;
  const entityWithBody = /<entity\b([^>]*[^/])>([\s\S]*?)<\/entity>/g;

  const addEntity = (rawAttrs: string, propsBlock = ""): void => {
    const attrs = parseAttrs(rawAttrs);
    const type = attrs["type"] as GraphNode["type"] | undefined;
    const name = attrs["name"];
    if (!type || !name) return;
    const properties: Record<string, string> = {};
    const propRegex = /<property\s+key="([^"]+)">([^<]*)<\/property>/g;
    let propMatch;
    while ((propMatch = propRegex.exec(propsBlock)) !== null) {
      properties[propMatch[1]] = propMatch[2];
    }
    nodes.push({
      id: generateId("gn"),
      type,
      name,
      properties,
      sourceObservationIds: observationIds,
      createdAt: now,
    });
  };

  let match;
  while ((match = entitySelfClose.exec(xml)) !== null) {
    addEntity(match[1]);
  }
  while ((match = entityWithBody.exec(xml)) !== null) {
    addEntity(match[1], match[2]);
  }

  const relRegex = /<relationship\b([^>]*?)\/>/g;
  while ((match = relRegex.exec(xml)) !== null) {
    const attrs = parseAttrs(match[1]);
    const type = attrs["type"] as GraphEdge["type"] | undefined;
    const sourceName = attrs["source"];
    const targetName = attrs["target"];
    if (!type || !sourceName || !targetName) continue;
    const parsedWeight = parseFloat(attrs["weight"] ?? "");
    const weight = Number.isFinite(parsedWeight) ? parsedWeight : 0.5;