1// Code node: Build classification prompt
2const classifyPrompt = `
3Analyze this email and classify on multiple dimensions:
4
5Subject: ${$json.subject}
6From: ${$json.from}
7Body: ${$json.body}
8
9Classify with:
101. **Category**: support, sales, billing, partnership, spam, internal, personal
112. **Priority**: critical, high, medium, low
123. **Sentiment**: positive, negative, neutral, angry
134. **Intent**: question, complaint, request, information, feedback
145. **Department**: engineering, marketing, sales, hr, finance, general
15
16Return JSON:
17{
18  "category": "...",
19  "priority": "...",
20  "sentiment": "...",
21  "intent": "...",
22  "department": "...",
23  "confidence": 0.0-1.0,
24  "summary": "one-line summary",
25  "suggestedAction": "..."
26}`;
27
28return { prompt: classifyPrompt };

1// Code node: Route based on classification
2const result = JSON.parse($json.message.content);
3
4let route = "general";
5let actions = [];
6
7// Priority routing
8if (result.priority === "critical") {
9  actions.push("send_slack_alert");
10  actions.push("notify_manager");
11}
12
13// Category routing
14switch (result.category) {
15  case "support":
16    route = "support_team";
17    actions.push("create_ticket");
18    break;
19  case "sales":
20    route = "crm";
21    actions.push("create_lead");
22    break;
23  case "spam":
24    route = "archive";
25    actions.push("mark_spam");
26    break;
27  case "billing":
28    route = "finance";
29    actions.push("create_ticket");
30    break;
31}
32
33// Sentiment-based escalation
34if (result.sentiment === "angry" && result.priority !== "critical") {
35  result.priority = "high";
36  actions.push("escalate");
37}
38
39return {
40  ...result,
41  route,
42  actions,
43  processedAt: new Date().toISOString()
44};

1// Code node: Generate Gmail labels
2const classification = $json;
3const labels = [];
4
5labels.push(`Priority/${classification.priority}`);
6labels.push(`Category/${classification.category}`);
7labels.push(`Department/${classification.department}`);
8
9if (classification.sentiment === "angry") {
10  labels.push("Needs-Attention");
11}
12
13return { labels, threadId: $json.threadId };

1// IF node conditions
2// Branch 1: High confidence (auto-process)
3// Condition: $json.confidence >= 0.85
4
5// Branch 2: Medium confidence (review queue)  
6// Condition: $json.confidence >= 0.5 AND < 0.85
7
8// Branch 3: Low confidence (manual)
9// Condition: $json.confidence < 0.5

1// Code node: Track classification metrics
2const metrics = {
3  timestamp: new Date().toISOString(),
4  category: $json.category,
5  priority: $json.priority,
6  confidence: $json.confidence,
7  autoRouted: $json.confidence >= 0.85,
8  processingTime: Date.now() - $json.receivedAt
9};
10
11// Save to Google Sheets or database for analytics
12return metrics;