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fix: implement client-side caching for example diagrams (#150)

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- Add client-side cache check in onFormSubmit to bypass API calls for example prompts
- Use findCachedResponse to match input against cached examples
- Directly set messages with cached tool response when example matches
- Hide regenerate button for cached example responses (toolCallId starts with 'cached-')
- Prevents unnecessary API calls when using example buttons

Co-authored-by: dayuan.jiang <jiangdy@amazon.co.jp>
This commit is contained in:
Dayuan Jiang
2025-12-07 19:36:09 +09:00
committed by GitHub
parent 0baf21fadb
commit 86420a42c6
3 changed files with 68 additions and 2 deletions
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24
app/api/chat/route.ts
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@@ -195,20 +195,44 @@ async function handleChatRequest(req: Request): Promise<Response> {
const isFirstMessage = messages.length === 1
const isEmptyDiagram = !xml || xml.trim() === "" || isMinimalDiagram(xml)
// DEBUG: Log cache check conditions
console.log("[Cache DEBUG] messages.length:", messages.length)
console.log("[Cache DEBUG] isFirstMessage:", isFirstMessage)
console.log("[Cache DEBUG] xml length:", xml?.length || 0)
console.log("[Cache DEBUG] xml preview:", xml?.substring(0, 200))
console.log("[Cache DEBUG] isEmptyDiagram:", isEmptyDiagram)
if (isFirstMessage && isEmptyDiagram) {
const lastMessage = messages[0]
const textPart = lastMessage.parts?.find((p: any) => p.type === "text")
const filePart = lastMessage.parts?.find((p: any) => p.type === "file")
console.log("[Cache DEBUG] textPart?.text:", textPart?.text)
console.log("[Cache DEBUG] hasFilePart:", !!filePart)
const cached = findCachedResponse(textPart?.text || "", !!filePart)
console.log("[Cache DEBUG] cached found:", !!cached)
if (cached) {
console.log(
"[Cache] Returning cached response for:",
textPart?.text,
)
return createCachedStreamResponse(cached.xml)
} else {
console.log("[Cache DEBUG] No cache match - checking why...")
console.log(
"[Cache DEBUG] Exact promptText:",
JSON.stringify(textPart?.text),
)
}
} else {
console.log("[Cache DEBUG] Skipping cache check - conditions not met")
if (!isFirstMessage)
console.log("[Cache DEBUG] Reason: not first message")
if (!isEmptyDiagram)
console.log("[Cache DEBUG] Reason: diagram not empty")
}
// === CACHE CHECK END ===