Merge pull request #24468 from overleaf/mj-client-side-references

[web] Perform ARS on client-side

GitOrigin-RevId: 19703c82758cae450fe52463ad9612d3a2383ba0

services/web/frontend/js/features/ide-react/references/basic-reference-index.ts

@@ -0,0 +1,24 @@
+import { ReferenceIndex } from './reference-index'
+import { Changes } from './types'
+
+export default class BasicReferenceIndex extends ReferenceIndex {
+  fileIndex: Map<string, Set<string>> = new Map()
+
+  updateIndex({ updates, deletes }: Changes): Set<string> {
+    for (const path of deletes) {
+      this.fileIndex.delete(path)
+    }
+    for (const { path, content } of updates) {
+      const fileReferences: Set<string> = new Set()
+      const entries = this.parseEntries(content)
+      for (const entry of entries) {
+        fileReferences.add(entry.EntryKey)
+      }
+      this.fileIndex.set(path, fileReferences)
+    }
+    this.keys = new Set(
+      this.fileIndex.values().flatMap(entry => Array.from(entry))
+    )
+    return this.keys
+  }
+}