chore: remove the new folder and fix imports (#740)

apps/web/components/memory-graph/canvas/version-chain.ts

@@ -0,0 +1,63 @@
+import type { GraphApiDocument, GraphApiMemory } from "../types"
+
+export interface ChainEntry {
+	id: string
+	version: number
+	memory: string
+	isForgotten: boolean
+	isLatest: boolean
+}
+
+export class VersionChainIndex {
+	private memoryMap = new Map<string, GraphApiMemory>()
+	private cache = new Map<string, ChainEntry[]>()
+	private lastDocs: GraphApiDocument[] | null = null
+
+	rebuild(documents: GraphApiDocument[]): void {
+		if (documents === this.lastDocs) return
+		this.lastDocs = documents
+		this.memoryMap.clear()
+		this.cache.clear()
+
+		for (const doc of documents) {
+			for (const m of doc.memories) {
+				this.memoryMap.set(m.id, m)
+			}
+		}
+	}
+
+	getChain(memoryId: string): ChainEntry[] | null {
+		const cached = this.cache.get(memoryId)
+		if (cached) return cached
+
+		const mem = this.memoryMap.get(memoryId)
+		if (!mem || mem.version <= 1) return null
+
+		// Walk parentMemoryId up to the root
+		const chain: ChainEntry[] = []
+		const visited = new Set<string>()
+		let current: GraphApiMemory | undefined = mem
+		while (current && !visited.has(current.id)) {
+			visited.add(current.id)
+			chain.push({
+				id: current.id,
+				version: current.version,
+				memory: current.memory,
+				isForgotten: current.isForgotten,
+				isLatest: current.isLatest,
+			})
+			current = current.parentMemoryId
+				? this.memoryMap.get(current.parentMemoryId)
+				: undefined
+		}
+
+		chain.reverse()
+
+		// Cache for every member in the chain
+		for (const entry of chain) {
+			this.cache.set(entry.id, chain)
+		}
+
+		return chain
+	}
+}