fix: harden analysis queue scheduling

src/moderation/aiAnalyzer.ts

@@ -3,6 +3,7 @@ import { createChildLogger } from "../logger";
 import { retryWithBackoff } from "../retry";
 import {
   getConversationContextBefore,
+  getMessageById,
   getPendingConversationKeys,
   getPendingMessagesByConversation,
   updateMessageAIAnalysis,
@@ -15,13 +16,17 @@ const logger = createChildLogger("ai-analyzer");
 
 // Debounce state per conversation key
 const conversationDebounceTimers = new Map<string, NodeJS.Timeout>();
-const conversationPendingBatches = new Map<string, Set<string>>();
+// Track conversations currently being processed
+const conversationProcessing = new Set<string>();
+// Track conversations in error cooldown (failed recently)
+const conversationErrorCooldown = new Map<string, number>();
 
 let activeRequests = 0;
 let lastError: string | null = null;
 const MAX_ACTIVE_REQUESTS = 1;
 const DEBOUNCE_MS = 1500;
 const RECOVERY_INTERVAL_MS = 15000;
+const ERROR_COOLDOWN_MS = 30000;
 const MAX_CONTEXT_TOKENS = 8000;
 const MAX_BATCH_SIZE = 25;
 
@@ -68,6 +73,7 @@ async function processBatch(
   if (messages.length === 0) return;
 
   activeRequests++;
+  conversationProcessing.add(conversationKey);
   try {
     // Get context before the first message
     const firstMessage = messages[0];
@@ -115,6 +121,9 @@ async function processBatch(
       (globalThis as any).broadcastMessageAnalyzed?.(row);
     }
 
+    // Clear error cooldown on success
+    conversationErrorCooldown.delete(conversationKey);
+
     logger.info(
       { conversationKey, count: messages.length },
       "Batch analysis complete",
@@ -142,8 +151,15 @@ async function processBatch(
         (globalThis as any).broadcastMessageAnalyzed?.(row);
       }
     }
+
+    // Set error cooldown for this conversation
+    conversationErrorCooldown.set(
+      conversationKey,
+      Date.now() + ERROR_COOLDOWN_MS,
+    );
   } finally {
     activeRequests--;
+    conversationProcessing.delete(conversationKey);
   }
 }
 
@@ -151,6 +167,25 @@ async function processBatch(
  * Debounced analysis trigger for a conversation
  */
 function scheduleConversationAnalysis(conversationKey: string): void {
+  // Skip if already processing
+  if (conversationProcessing.has(conversationKey)) {
+    logger.debug(
+      { conversationKey },
+      "Conversation already processing, skipping schedule",
+    );
+    return;
+  }
+
+  // Skip if in error cooldown
+  const cooldownUntil = conversationErrorCooldown.get(conversationKey);
+  if (cooldownUntil && Date.now() < cooldownUntil) {
+    logger.debug(
+      { conversationKey, cooldownMs: cooldownUntil - Date.now() },
+      "Conversation in error cooldown, skipping schedule",
+    );
+    return;
+  }
+
   // Clear existing timer
   const existingTimer = conversationDebounceTimers.get(conversationKey);
   if (existingTimer) {
@@ -161,9 +196,14 @@ function scheduleConversationAnalysis(conversationKey: string): void {
   const timer = setTimeout(async () => {
     conversationDebounceTimers.delete(conversationKey);
 
-    // Wait for active requests to complete
+    // If activeRequests >= MAX_ACTIVE_REQUESTS, requeue instead of waiting
-    while (activeRequests >= MAX_ACTIVE_REQUESTS) {
+    if (activeRequests >= MAX_ACTIVE_REQUESTS) {
-      await new Promise((resolve) => setTimeout(resolve, 100));
+      logger.debug(
+        { conversationKey, activeRequests },
+        "Max active requests reached, requeuing conversation",
+      );
+      scheduleConversationAnalysis(conversationKey);
+      return;
     }
 
     // Get pending messages for this conversation
@@ -175,9 +215,6 @@ function scheduleConversationAnalysis(conversationKey: string): void {
     if (messages.length > 0) {
       await processBatch(conversationKey, messages);
     }
-
-    // Clear pending batch
-    conversationPendingBatches.delete(conversationKey);
   }, DEBOUNCE_MS);
 
   conversationDebounceTimers.set(conversationKey, timer);
@@ -186,13 +223,31 @@ function scheduleConversationAnalysis(conversationKey: string): void {
 /**
  * Queues a message for analysis (debounced by conversation)
  */
-export function queueMessageAnalysis(messageId: string): void {
+export async function queueMessageAnalysis(messageId: string): Promise<void> {
   if (!config.AI_ANALYSIS_ENABLED) return;
 
   logger.debug({ messageId }, "Queueing message for analysis");
 
-  // Note: We don't have the message here, so we'll rely on recovery interval
+  try {
-  // to pick it up from the database
+    // Look up the message to get its conversation key
+    const message = await getMessageById(messageId);
+    if (!message) {
+      logger.warn({ messageId }, "Message not found for analysis queue");
+      return;
+    }
+
+    // Schedule its conversation for analysis
+    const conversationKey = getConversationKey(message);
+    queueConversationAnalysis(conversationKey);
+  } catch (error) {
+    logger.error(
+      {
+        messageId,
+        error: error instanceof Error ? error.message : String(error),
+      },
+      "Failed to queue message for analysis",
+    );
+  }
 }
 
 /**
@@ -203,11 +258,6 @@ export function queueConversationAnalysis(conversationKey: string): void {
 
   logger.debug({ conversationKey }, "Queueing conversation for analysis");
 
-  // Track pending batch
-  if (!conversationPendingBatches.has(conversationKey)) {
-    conversationPendingBatches.set(conversationKey, new Set());
-  }
-
   // Schedule debounced analysis
   scheduleConversationAnalysis(conversationKey);
 }
@@ -240,15 +290,28 @@ export function startPendingAIAnalysisWorker(): void {
       const conversationKeys = await getPendingConversationKeys(100);
 
       for (const key of conversationKeys) {
-        // Only schedule if not already scheduled
+        // Skip if already scheduled
-        if (!conversationDebounceTimers.has(key)) {
+        if (conversationDebounceTimers.has(key)) {
+          continue;
+        }
+
+        // Skip if currently processing
+        if (conversationProcessing.has(key)) {
+          continue;
+        }
+
+        // Skip if in error cooldown
+        const cooldownUntil = conversationErrorCooldown.get(key);
+        if (cooldownUntil && Date.now() < cooldownUntil) {
+          continue;
+        }
+
         logger.debug(
           { conversationKey: key },
           "Recovering pending conversation",
         );
         scheduleConversationAnalysis(key);
       }
-      }
     } catch (error) {
       logger.error({ error }, "Pending AI analysis recovery worker failed");
     }

src/moderation/messageStore.ts

@@ -509,17 +509,16 @@ export async function getPendingMessagesByConversation(
     const db = getDatabase() as any;
 
     // conversationKey is either thread_id or channel_id
-    const isThreadId = conversationKey.startsWith("t");
+    // Query both to safely handle the key
-    const condition = isThreadId
-      ? eq(messagesTable.thread_id, conversationKey)
-      : eq(messagesTable.channel_id, conversationKey);
-
     const rows = await db
       .select()
       .from(messagesTable)
       .where(
         and(
-          condition,
+          or(
+            eq(messagesTable.thread_id, conversationKey),
+            eq(messagesTable.channel_id, conversationKey),
+          ),
           eq(messagesTable.ai_status, "pending"),
           isNull(messagesTable.deleted_at),
         ),