1// OpenAI System Prompt
2const systemPrompt = `
3You are an email summarizer. For each email, provide:
41. **TL;DR** (1 sentence, max 15 words)
52. **Key Points** (2-4 bullet points)
63. **Action Items** (tasks to do, or "None")
74. **Deadline** (if mentioned, or "None")
85. **Reply Needed** (yes/no)
9
10Format as clean text, not JSON.
11Keep the language same as the original email.
12`;
13
14// User message
15const userMessage = `
16From: ${$json.from}
17Subject: ${$json.subject}
18Date: ${$json.date}
19
20${$json.body}
21`;

1// Code node: Combine thread messages
2const messages = $json.messages; // Array from Gmail Get Thread
3
4const threadContent = messages.map((msg, i) => `
5--- Message ${i + 1} ---
6From: ${msg.from}
7Date: ${msg.date}
8${msg.body}
9`).join("\n");
10
11const prompt = `
12Summarize this email thread:
13- Number of messages: ${messages.length}
14- Participants: list all
15- Key decisions made
16- Open questions
17- Action items per person
18
19Thread:
20${threadContent}
21`;
22
23return { prompt, messageCount: messages.length };

1// Code node: Prepare digest prompt
2const emails = $input.all();
3
4const emailList = emails.map((e, i) => `
5[${i + 1}] From: ${e.json.from}
6Subject: ${e.json.subject}
7Preview: ${e.json.body.substring(0, 200)}
8`).join("\n---\n");
9
10const digestPrompt = `
11Create a morning email digest from ${emails.length} emails received today.
12
13Format:
14## Email Digest - ${new Date().toLocaleDateString()}
15Total: ${emails.length} emails
16
17### Urgent (needs immediate attention)
18- [subject] from [sender] - [1 line summary]
19
20### Important (respond today)
21- ...
22
23### FYI (no action needed)
24- ...
25
26### Action Items
27- [ ] task from email X
28
29Emails:
30${emailList}
31`;
32
33return { prompt: digestPrompt };

1// OpenAI prompt for action item extraction
2const extractPrompt = `
3Extract all action items from this email.
4For each action item:
5- Task description
6- Assigned to (if mentioned)
7- Due date (if mentioned)  
8- Priority (high/medium/low based on context)
9
10Return JSON array:
11[
12  {
13    "task": "...",
14    "assignedTo": "...",
15    "dueDate": "...",
16    "priority": "..."
17  }
18]
19
20Email:
21From: ${$json.from}
22Subject: ${$json.subject}
23Body: ${$json.body}
24`;

1// Format for Slack message
2const summary = $json.summary;
3const slackMessage = {
4  blocks: [
5    {
6      type: "header",
7      text: {
8        type: "plain_text",
9        text: `Email Summary: ${$json.subject}`
10      }
11    },
12    {
13      type: "section", 
14      text: {
15        type: "mrkdwn",
16        text: `*From:* ${$json.from}\n*TL;DR:* ${summary.tldr}`
17      }
18    },
19    {
20      type: "section",
21      text: {
22        type: "mrkdwn", 
23        text: `*Key Points:*\n${summary.keyPoints.map(p => `• ${p}`).join('\n')}`
24      }
25    }
26  ]
27};
28
29return slackMessage;