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5// main controller function
6export async function emailValHandler(receivedEmail) {
7  const openaiUrl = "https://api.openai.com/v1/chat/completions";
8  const apiKey = Deno.env.get("OPENAI_KEY"); // replace this entire line with your OpenAI API key as a string, e.g., "sk-123..." or use environment variable: https://docs.val.town/reference/environment-variables/
9  const model = "gpt-4o-mini";
10
11  if (!apiKey) {
12    throw new Error(
13      "OPENAI_KEY environment variable is not set. Please set it or replace this line with your API key.",
14    );
15  }
35  const prompt = generatePrompt(receivedEmail, pdfTexts, emailText);
36
37  // step 4: send prompt to openai
38  const openaiResponse = await sendRequestToOpenAI(prompt, openaiUrl, apiKey, model);
39
40  // log the openai response
41  console.log("openai response:", openaiResponse);
42
43  // step 5: send the response back via email
44  await sendResponseByEmail(receivedEmail.from, openaiResponse);
45
46  console.log("response email sent.");
97}
98
99// helper function to generate a prompt for openai
100function generatePrompt(email, pdfTexts, emailText) {
101  // extract the first name from the 'from' field if it exists
121}
122
123// helper function to send a request to openai
124async function sendRequestToOpenAI(prompt, openaiUrl, apiKey, model) {
125  try {
126    // prepare the openai messages payload
127    const messages = [
128      {
142    };
143
144    // send the request to openai
145    const response = await fetch(openaiUrl, {
146      method: "POST",
147      body: JSON.stringify(body),
154    // parse the response
155    const data = await response.json();
156    return data.choices[0]?.message?.content || "no response from openai.";
157  } catch (err) {
158    console.error("error in sendRequestToOpenAI:", err);
159    return "error processing your request.";
160  }

88Note: When changing a SQLite table's schema, change the table's name (e.g., add _2 or _3) to create a fresh table.
89
90### OpenAI
91
92```ts
93import { OpenAI } from "https://esm.town/v/std/openai";
94const openai = new OpenAI();
95const completion = await openai.chat.completions.create({
96  messages: [
97    { role: "user", content: "Say hello in a creative way" },

94Note: When changing a SQLite table's schema, change the table's name (e.g., add _2 or _3) to create a fresh table.
95
96### OpenAI
97
98```ts
99import { OpenAI } from "https://esm.town/v/std/openai";
100const openai = new OpenAI();
101const completion = await openai.chat.completions.create({
102  messages: [
103    { role: "user", content: "Say hello in a creative way" },

88Note: When changing a SQLite table's schema, change the table's name (e.g., add _2 or _3) to create a fresh table.
89
90### OpenAI
91
92```ts
93import { OpenAI } from "https://esm.town/v/std/openai";
94const openai = new OpenAI();
95const completion = await openai.chat.completions.create({
96  messages: [
97    { role: "user", content: "Say hello in a creative way" },

94Note: When changing a SQLite table's schema, change the table's name (e.g., add _2 or _3) to create a fresh table.
95
96### OpenAI
97
98```ts
99import { OpenAI } from "https://esm.town/v/std/openai";
100const openai = new OpenAI();
101const completion = await openai.chat.completions.create({
102  messages: [
103    { role: "user", content: "Say hello in a creative way" },

100Note: When changing a SQLite table's schema, change the table's name (e.g., add _2 or _3) to create a fresh table.
101
102### OpenAI
103```ts
104import { OpenAI } from "https://esm.town/v/std/openai";
105const openai = new OpenAI();
106const completion = await openai.chat.completions.create({
107  messages: [
108    { role: "user", content: "Say hello in a creative way" },

100Note: When changing a SQLite table's schema, change the table's name (e.g., add _2 or _3) to create a fresh table.
101
102### OpenAI
103```ts
104import { OpenAI } from "https://esm.town/v/std/openai";
105const openai = new OpenAI();
106const completion = await openai.chat.completions.create({
107  messages: [
108    { role: "user", content: "Say hello in a creative way" },

100Note: When changing a SQLite table's schema, change the table's name (e.g., add _2 or _3) to create a fresh table.
101
102### OpenAI
103```ts
104import { OpenAI } from "https://esm.town/v/std/openai";
105const openai = new OpenAI();
106const completion = await openai.chat.completions.create({
107  messages: [
108    { role: "user", content: "Say hello in a creative way" },

88Note: When changing a SQLite table's schema, change the table's name (e.g., add _2 or _3) to create a fresh table.
89
90### OpenAI
91
92```ts
93import { OpenAI } from "https://esm.town/v/std/openai";
94const openai = new OpenAI();
95const completion = await openai.chat.completions.create({
96  messages: [
97    { role: "user", content: "Say hello in a creative way" },

94Note: When changing a SQLite table's schema, change the table's name (e.g., add _2 or _3) to create a fresh table.
95
96### OpenAI
97
98```ts
99import { OpenAI } from "https://esm.town/v/std/openai";
100const openai = new OpenAI();
101const completion = await openai.chat.completions.create({
102  messages: [
103    { role: "user", content: "Say hello in a creative way" },