fix(types): correct field/domain/subfield entity types in relationship queries

- Fix ENTITY_RELATIONSHIP_QUERIES registry for topics outbound relationships:
  - topic_part_of_field: targetType 'topics' → 'fields'
  - field_part_of_domain: targetType 'topics' → 'domains'
  - topic_part_of_subfield: targetType 'topics' → 'subfields'
- Add path-based URL handling in convertOpenAlexToInternalLink:
  - Support URLs like openalex.org/fields/17, /domains/3, /subfields/1703
  - Handle both api.openalex.org and openalex.org formats

Author: Mearman

apps/web/src/utils/openalex-link-conversion.ts

@@ -34,17 +34,29 @@ export const getEntityTypeFromId = (id: string): string | null => {
   return typeMap[prefix] || null;
 };
 
+/** All valid OpenAlex entity type paths */
+const OPENALEX_ENTITY_PATHS = [
+  'works', 'authors', 'sources', 'institutions', 'topics',
+  'publishers', 'funders', 'concepts',
+  'fields', 'domains', 'subfields', 'keywords'
+] as const;
+
 /**
  * Converts an OpenAlex URL or ID to an internal app path
+ * Handles multiple URL formats:
+ * - Direct ID: https://openalex.org/W1234567890
+ * - Path + ID: https://openalex.org/works/W1234567890
+ * - Path-based: https://openalex.org/fields/17, /keywords/machine-learning
+ * - API URLs: https://api.openalex.org/works/W1234567890
  * @param url
  */
 export const convertOpenAlexToInternalLink = (url: string): ConvertedLink => {
   const originalUrl = url;
 
-  // Case 1: OpenAlex entity URL (https://openalex.org/A5017898742)
-  const entityUrlMatch = url.match(/https?:\/\/openalex\.org\/([ACFIPSTVW]\d+)/i);
-  if (entityUrlMatch) {
-    const entityId = entityUrlMatch[1];
+  // Case 1: Direct entity ID URL (https://openalex.org/W1234567890)
+  const directIdMatch = url.match(/https?:\/\/openalex\.org\/([ACFIPSTVW]\d+)$/i);
+  if (directIdMatch) {
+    const entityId = directIdMatch[1];
     const entityType = getEntityTypeFromId(entityId);
     if (entityType) {
       return {
@@ -55,7 +67,24 @@ export const convertOpenAlexToInternalLink = (url: string): ConvertedLink => {
     }
   }
 
-  // Case 2: OpenAlex API URL (https://api.openalex.org/works?filter=author.id:A5017898742)
+  // Case 2: Path-based entity URLs (https://openalex.org/{entityType}/{id})
+  // Handles both ID-based (works/W123) and numeric/string IDs (fields/17, keywords/machine-learning)
+  const entityPathPattern = new RegExp(
+    String.raw`https?://(?:api\.)?openalex\.org/(${OPENALEX_ENTITY_PATHS.join('|')})/([^/?#]+)`,
+    'i'
+  );
+  const pathMatch = url.match(entityPathPattern);
+  if (pathMatch) {
+    const entityType = pathMatch[1].toLowerCase();
+    const entityId = pathMatch[2];
+    return {
+      isOpenAlexLink: true,
+      internalPath: `/${entityType}/${entityId}`,
+      originalUrl,
+    };
+  }
+
+  // Case 3: OpenAlex API URL with query params (https://api.openalex.org/works?filter=...)
   const apiUrlMatch = url.match(/https?:\/\/api\.openalex\.org\/([^?]+)(\?.*)?/i);
   if (apiUrlMatch) {
     const path = apiUrlMatch[1];
@@ -67,7 +96,7 @@ export const convertOpenAlexToInternalLink = (url: string): ConvertedLink => {
     };
   }
 
-  // Case 3: Just an OpenAlex ID (A5017898742)
+  // Case 4: Just an OpenAlex ID (A5017898742)
   if (isOpenAlexId(url)) {
     const entityType = getEntityTypeFromId(url);
     if (entityType) {

packages/types/src/entities/relationship-queries.ts

@@ -500,7 +500,7 @@ export const ENTITY_RELATIONSHIP_QUERIES: Record<EntityType, EntityRelationshipQ
       {
         source: 'embedded',
         type: 'topic_part_of_field',
-        targetType: 'topics',
+        targetType: 'fields',
         label: 'Field',
         extractEmbedded: (entityData) => {
           const field = entityData.field as Record<string, unknown> | undefined;
@@ -516,7 +516,7 @@ export const ENTITY_RELATIONSHIP_QUERIES: Record<EntityType, EntityRelationshipQ
       {
         source: 'embedded',
         type: 'field_part_of_domain',
-        targetType: 'topics',
+        targetType: 'domains',
         label: 'Domain',
         extractEmbedded: (entityData) => {
           const domain = entityData.domain as Record<string, unknown> | undefined;
@@ -532,7 +532,7 @@ export const ENTITY_RELATIONSHIP_QUERIES: Record<EntityType, EntityRelationshipQ
       {
         source: 'embedded',
         type: 'topic_part_of_subfield',
-        targetType: 'topics',
+        targetType: 'subfields',
         label: 'Subfield',
         extractEmbedded: (entityData) => {
           const subfield = entityData.subfield as Record<string, unknown> | undefined;