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📄 Source: get_email.php

<?php
session_start();
require_once 'vendor/autoload.php';

header('Content-Type: application/json');

if (!isset($_SESSION['access_token'])) {
    echo json_encode(['error' => 'Not authenticated']);
    exit();
}

$input = json_decode(file_get_contents('php://input'), true);
$emailId = $input['email_id'] ?? '';

if (!$emailId) {
    echo json_encode(['error' => 'No email ID provided']);
    exit();
}

try {
    $client = new Google\Client();
    $client->setAccessToken($_SESSION['access_token']);
    $service = new Google\Service\Gmail($client);
    
    $message = $service->users_messages->get('me', $emailId, ['format' => 'full']);
    $payload = $message->getPayload();
    
    function decodeBase64($data) {
        return base64_decode(strtr($data, '-_', '+/'));
    }
    
    // Find and extract the body
    $body = '';
    
    if ($payload->getBody() && $payload->getBody()->getData()) {
        $body = decodeBase64($payload->getBody()->getData());
    }
    
    if (empty($body) && $payload->getParts()) {
        foreach ($payload->getParts() as $part) {
            if ($part->getMimeType() == 'text/plain' && $part->getBody() && $part->getBody()->getData()) {
                $body = decodeBase64($part->getBody()->getData());
                break;
            }
            if ($part->getMimeType() == 'text/html' && $part->getBody() && $part->getBody()->getData()) {
                $body = decodeBase64($part->getBody()->getData());
            }
            if ($part->getParts()) {
                foreach ($part->getParts() as $subPart) {
                    if ($subPart->getMimeType() == 'text/plain' && $subPart->getBody() && $subPart->getBody()->getData()) {
                        $body = decodeBase64($subPart->getBody()->getData());
                        break 2;
                    }
                    if ($subPart->getMimeType() == 'text/html' && $subPart->getBody() && $subPart->getBody()->getData()) {
                        $body = decodeBase64($subPart->getBody()->getData());
                    }
                }
            }
        }
    }
    
    // Convert HTML to text
    if (strpos($body, '<') !== false) {
        $body = preg_replace('/<style[^>]*>.*?<\/style>/is', '', $body);
        $body = preg_replace('/<script[^>]*>.*?<\/script>/is', '', $body);
        $body = preg_replace('/<br\s*\/?>/i', "\n", $body);
        $body = preg_replace('/<\/p>/i', "\n", $body);
        $body = preg_replace('/<\/div>/i', "\n", $body);
        $body = preg_replace('/<li[^>]*>/i', "\n• ", $body);
        $body = strip_tags($body);
        $body = html_entity_decode($body, ENT_QUOTES | ENT_HTML5, 'UTF-8');
    }
    
    // Remove invisible characters
    $body = preg_replace('/[\x{200B}-\x{200D}\x{FEFF}]/u', '', $body);
    
    // Remove excessive blank lines (this is the key fix)
    $body = preg_replace("/[ \t]+/", ' ', $body);
    $body = preg_replace("/\n[ \t]+/", "\n", $body);
    $body = preg_replace("/\n{3,}/", "\n\n", $body);
    
    // Remove lines that are just spaces or empty
    $lines = explode("\n", $body);
    $cleanLines = [];
    foreach ($lines as $line) {
        $line = trim($line);
        if ($line !== '') {
            $cleanLines[] = $line;
        }
    }
    $body = implode("\n", $cleanLines);
    
    // Remove specific footer lines
    $footerLines = [
        'Unsubscribe', 'Privacy', 'Terms', 'View in Browser', 'All rights reserved',
        'You are receiving this email because', 'Our mailing address is',
        'To unsubscribe from receiving email', 'Unsubscribe Here'
    ];
    $lines = explode("\n", $body);
    $cleanLines = [];
    foreach ($lines as $line) {
        $isFooter = false;
        foreach ($footerLines as $footer) {
            if (stripos($line, $footer) !== false) {
                $isFooter = true;
                break;
            }
        }
        if (!$isFooter && strlen($line) > 3) {
            $cleanLines[] = $line;
        }
    }
    $body = implode("\n", $cleanLines);
    
    // Remove duplicate consecutive lines (for ChatGPT email)
    $lines = explode("\n", $body);
    $uniqueLines = [];
    $prev = '';
    foreach ($lines as $line) {
        if ($line !== $prev) {
            $uniqueLines[] = $line;
        }
        $prev = $line;
    }
    $body = implode("\n", $uniqueLines);
    
    // Limit size
    if (strlen($body) > 4000) {
        $body = substr($body, 0, 4000) . "\n\n...(truncated)";
    }
    
    if (empty($body) || strlen($body) < 10) {
        $body = '(No readable content in this email)';
    }
    
    echo json_encode(['content' => $body]);
    
} catch (Exception $e) {
    echo json_encode(['error' => $e->getMessage()]);
}
?>