feature: create post

actions/contact.ts

@@ -0,0 +1,148 @@
+"use server";
+
+import { z } from "zod";
+import nodemailer from "nodemailer";
+import { GoogleGenerativeAI } from "@google/generative-ai";
+
+// Define the schema for contact form validation
+const ContactSchema = z.object({
+  name: z.string().min(2, "Name must be at least 2 characters"),
+  email: z.string().email("Invalid email address"),
+  subject: z.string().min(5, "Subject must be at least 5 characters"),
+  message: z.string().min(10, "Message must be at least 10 characters"),
+});
+
+// Define the state structure for the form action
+export type ContactFormState = {
+  errors?: {
+    name?: string[];
+    email?: string[];
+    subject?: string[];
+    message?: string[];
+    _form?: string[]; // General form error
+  };
+  message?: string | null; // Success or general error message
+  success?: boolean; // Flag for successful submission
+};
+
+// --- Initialize Gemini ---
+const genAI = new GoogleGenerativeAI(process.env.GEMINI_API_KEY || "");
+const geminiModel = genAI.getGenerativeModel({ model: "gemini-2.0-flash" }); // Or other suitable model
+
+// --- Initialize Nodemailer Transporter ---
+const transporter = nodemailer.createTransport({
+  host: process.env.EMAIL_SERVER_HOST,
+  port: parseInt(process.env.EMAIL_SERVER_PORT || "587"), // Default to 587
+  secure: parseInt(process.env.EMAIL_SERVER_PORT || "587") === 465, // true for 465, false for other ports
+  auth: {
+    user: process.env.EMAIL_SERVER_USER,
+    pass: process.env.EMAIL_SERVER_PASSWORD,
+  },
+});
+
+// --- Helper function for Spam Check ---
+async function isSpamOrAdvertisement(content: {
+  subject: string;
+  message: string;
+  email: string;
+}): Promise<boolean> {
+  if (!process.env.GEMINI_API_KEY) {
+    console.warn("GEMINI_API_KEY not set. Skipping spam check.");
+    return false; // Skip check if API key is missing
+  }
+
+  const prompt = `Analyze the following email content and classify it as "spam", "advertisement", or "legitimate inquiry". Consider the subject, message body, and sender email. Provide only the classification word as the response.
+
+Subject: ${content.subject}
+Sender Email: ${content.email}
+Message:
+${content.message}`;
+
+  try {
+    const result = await geminiModel.generateContent(prompt);
+    const response = await result.response;
+    const text = response.text().trim().toLowerCase();
+    console.log("Gemini Classification:", text); // Log classification for debugging
+    // Consider "spam" or "advertisement" as unwanted
+    return text === "spam" || text === "advertisement";
+  } catch (error) {
+    console.error("Error checking content with Gemini:", error);
+    // Fail open (treat as not spam) if Gemini check fails
+    return false;
+  }
+}
+
+// Server action to process the contact form
+export async function submitContactForm(
+  prevState: ContactFormState,
+  formData: FormData
+): Promise<ContactFormState> {
+  // Validate form data
+  const validatedFields = ContactSchema.safeParse({
+    name: formData.get("name"),
+    email: formData.get("email"),
+    subject: formData.get("subject"),
+    message: formData.get("message"),
+  });
+
+  // If validation fails, return errors
+  if (!validatedFields.success) {
+    console.error(
+      "Contact Form Validation Errors:",
+      validatedFields.error.flatten().fieldErrors
+    );
+    return {
+      errors: validatedFields.error.flatten().fieldErrors,
+      message: "Please correct the errors above.",
+      success: false,
+    };
+  }
+
+  const { name, email, subject, message } = validatedFields.data;
+
+  // --- Spam/Advertisement Check ---
+  try {
+    const isUnwanted = await isSpamOrAdvertisement({ subject, message, email });
+    if (isUnwanted) {
+      console.log(`Message from ${email} flagged as spam/advertisement.`);
+      // Return generic error as requested
+      return { message: "Message could not be sent.", success: false };
+    }
+  } catch (error) {
+    // Log error but proceed if check fails unexpectedly
+    console.error("Error during spam check:", error);
+  }
+  // --- End Spam Check ---
+
+  // --- Send Email using Nodemailer ---
+  const mailOptions = {
+    from: process.env.EMAIL_FROM, // Sender address (configured in .env)
+    to: process.env.EMAIL_TO, // List of receivers (configured in .env)
+    replyTo: email, // Set reply-to to the user's email
+    subject: `Website Contact: ${subject}`, // Subject line
+    text: `Name: ${name}\nEmail: ${email}\n\nMessage:\n${message}`, // Plain text body
+    html: `<p><strong>Name:</strong> ${name}</p>
+           <p><strong>Email:</strong> <a href="mailto:${email}">${email}</a></p>
+           <hr>
+           <p><strong>Message:</strong></p>
+           <p>${message.replace(/\n/g, "<br>")}</p>`, // HTML body
+  };
+
+  try {
+    await transporter.sendMail(mailOptions);
+    console.log("Contact email sent successfully from:", email);
+    return {
+      message: "Thank you for your message! We'll get back to you soon.",
+      success: true,
+    };
+  } catch (error) {
+    console.error("Failed to send contact email:", error);
+    return {
+      message:
+        "Failed to send message due to a server error. Please try again later.",
+      success: false,
+      errors: { _form: ["Email sending failed."] },
+    };
+  }
+  // --- End Send Email ---
+}