Reorganize modules into layered directories

graph/node-labels.js

@@ -0,0 +1,64 @@
+const DEFAULT_GRAPH_LABEL_LENGTH = 14;
+
+const GRAPH_LABEL_LENGTH_BY_TYPE = {
+  character: 12,
+  event: 14,
+  location: 12,
+  thread: 14,
+  rule: 14,
+  synopsis: 16,
+  reflection: 14,
+  pov_memory: 16,
+};
+
+function normalizeLabelText(value) {
+  return String(value ?? "")
+    .replace(/\s+/g, " ")
+    .trim();
+}
+
+export function truncateNodeLabel(text, maxLength = DEFAULT_GRAPH_LABEL_LENGTH) {
+  const normalized = normalizeLabelText(text);
+  if (!normalized) return "—";
+  if (!Number.isFinite(maxLength) || maxLength < 2) return normalized;
+  if (normalized.length <= maxLength) return normalized;
+  return `${normalized.slice(0, Math.max(1, maxLength - 1)).trimEnd()}…`;
+}
+
+export function deriveEventTitleFromSummary(summary, maxLength = 18) {
+  const normalized = normalizeLabelText(summary).replace(/^事件[：:]\s*/, "");
+  if (!normalized) return "";
+
+  const clause =
+    normalized.split(/[\r\n]+/, 1)[0]?.split(/[。！？!?]/, 1)[0]?.split(/[；;]/, 1)[0]?.split(/[，,]/, 1)[0] ||
+    normalized;
+
+  return truncateNodeLabel(clause || normalized, maxLength);
+}
+
+export function ensureEventTitle(fields = {}) {
+  const nextFields = { ...(fields || {}) };
+  if (!nextFields.title && nextFields.summary) {
+    nextFields.title = deriveEventTitleFromSummary(nextFields.summary);
+  }
+  return nextFields;
+}
+
+export function getNodeDisplayName(node) {
+  const label = normalizeLabelText(
+    node?.fields?.name ||
+      node?.fields?.title ||
+      node?.fields?.summary ||
+      node?.fields?.insight ||
+      node?.name ||
+      node?.id?.slice(0, 8) ||
+      "—",
+  );
+  return label || "—";
+}
+
+export function getGraphNodeLabel(node) {
+  const maxLength =
+    GRAPH_LABEL_LENGTH_BY_TYPE[node?.type] || DEFAULT_GRAPH_LABEL_LENGTH;
+  return truncateNodeLabel(getNodeDisplayName(node), maxLength);
+}