507 lines
21 KiB
PHP
507 lines
21 KiB
PHP
<?php
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// ============================================================================
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// Dynamic ATS-Optimized CV Generator & AI Proxy (Backend)
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// ----------------------------------------------------------------------------
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// All CV facts come from profile.json, which is generated from profile_data.js
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// (run `node sync_profile.js` after editing the profile). Nothing in this file
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// hardcodes a job title, a metric, a date or a contact detail.
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// ============================================================================
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header('Access-Control-Allow-Origin: *');
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header('Access-Control-Allow-Methods: POST, OPTIONS');
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header('Access-Control-Allow-Headers: Content-Type');
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if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
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http_response_code(200);
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exit;
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}
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$autoloadPath = __DIR__ . '/vendor/autoload.php';
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if (!file_exists($autoloadPath)) {
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http_response_code(500);
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echo json_encode(["error" => "Vendor folder not found. Please run 'composer install'."]);
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exit;
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}
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require_once $autoloadPath;
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use Dompdf\Dompdf;
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use Dompdf\Options;
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use Dotenv\Dotenv;
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// .env lives outside the document root.
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$envPath = realpath(__DIR__ . '/../../../..');
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if ($envPath && file_exists($envPath . '/.env')) {
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$dotenv = Dotenv::createImmutable($envPath);
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$dotenv->load();
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}
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$rawData = file_get_contents('php://input');
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$data = json_decode($rawData, true) ?: [];
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$action = $data['action'] ?? 'generateText';
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$apiKey = $_ENV['GEMINI_API_KEY'] ?? getenv('GEMINI_API_KEY') ?: ($data['apiKey'] ?? '');
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if (empty($apiKey)) {
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http_response_code(400);
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echo json_encode(["error" => "Missing apiKey. Set GEMINI_API_KEY in .env or pass it in the request."]);
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exit;
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}
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// ── Model selection ─────────────────────────────────────────────────────────
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// CV tailoring is the one call where output quality directly determines whether
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// an application lands, so it gets the stronger model. Comments and post
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// rewrites are high-volume and low-stakes, so they stay on the cheap model.
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$MODELS = [
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'generatePdf' => $_ENV['GEMINI_MODEL_CV'] ?? 'gemini-flash-latest',
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'generateText' => $_ENV['GEMINI_MODEL_TEXT'] ?? 'gemini-flash-latest',
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'generateComment' => $_ENV['GEMINI_MODEL_LIGHT'] ?? 'gemini-flash-lite-latest',
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'repurposePost' => $_ENV['GEMINI_MODEL_LIGHT'] ?? 'gemini-flash-lite-latest',
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];
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function geminiUrl(string $model, string $apiKey): string {
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return "https://generativelanguage.googleapis.com/v1beta/models/{$model}:generateContent?key=" . $apiKey;
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}
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function callGemini(string $url, array $payload): array {
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$ch = curl_init($url);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
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curl_setopt($ch, CURLOPT_POST, true);
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curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($payload));
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curl_setopt($ch, CURLOPT_TIMEOUT, 120);
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$response = curl_exec($ch);
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$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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$curlErr = curl_error($ch);
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curl_close($ch);
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return ['body' => $response, 'code' => $httpCode, 'error' => $curlErr];
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}
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function loadProfile(): array {
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$path = __DIR__ . '/profile.json';
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if (!file_exists($path)) {
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http_response_code(500);
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echo json_encode(["error" => "profile.json missing. Run 'node sync_profile.js' and redeploy."]);
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exit;
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}
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$profile = json_decode(file_get_contents($path), true);
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if (!is_array($profile)) {
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http_response_code(500);
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echo json_encode(["error" => "profile.json is not valid JSON."]);
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exit;
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}
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return $profile;
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}
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function e(?string $s): string {
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return htmlspecialchars((string)$s, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
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}
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// ============================================================================
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// ACTION 1: Generate ATS PDF CV
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// ============================================================================
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if ($action === 'generatePdf') {
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$jobDescription = trim($data['jobDescription'] ?? '');
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$jobTitle = trim($data['jobTitle'] ?? '');
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// 'amman' biases toward the local Jordanian market; 'default' toward
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// GCC / international / remote. It changes EMPHASIS ONLY — never facts.
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$market = ($data['template'] ?? 'default') === 'amman' ? 'amman' : 'default';
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if ($jobDescription === '') {
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http_response_code(400);
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echo json_encode(["error" => "jobDescription is required to tailor the CV."]);
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exit;
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}
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$profile = loadProfile();
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$id = $profile['identity'];
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$bounds = $profile['boundaries'];
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// ── Build the reference blocks the model must work from ────────────────
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$skillsRef = '';
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foreach ($profile['skills'] as $group => $items) {
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$skillsRef .= "- {$group}: " . implode(', ', $items) . "\n";
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}
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$experienceRef = '';
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foreach ($profile['experience'] as $ri => $role) {
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$experienceRef .= "ROLE INDEX {$ri}: {$role['title']} — {$role['company']} ({$role['start']} – {$role['end']}, {$role['location']})\n";
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foreach ($role['bullets'] as $bi => $bullet) {
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$experienceRef .= " [{$ri}.{$bi}] {$bullet['text']}\n";
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}
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}
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$marketGuidance = $market === 'amman'
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? "TARGET MARKET: Jordan / Amman local tech market. Titles here are conservative — " .
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"prefer 'Senior Mobile Engineer', 'Lead Mobile Engineer' or 'Mobile Technical Lead' " .
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"over 'Architect' unless the posting itself uses 'Architect'. Emphasise hands-on " .
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"delivery, cost control and breadth. State availability for on-site/hybrid in Amman."
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: "TARGET MARKET: GCC / international / remote. 'Senior Mobile Architect' and " .
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"'Founding Engineer' land well here. Emphasise 0-to-1 platform ownership, scale " .
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"metrics, real-time systems and infrastructure cost reduction. Note openness to " .
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"relocation and remote work.";
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$prompt = <<<PROMPT
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You are an expert ATS résumé tailor. Rewrite my CV content so it scores as highly
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as possible against the job description below WITHOUT stating anything untrue.
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{$marketGuidance}
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=== ATS METHODOLOGY — APPLY ALL OF IT ===
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1. EXACT-TERM MIRRORING: ATS matching is literal. If the posting says "React Native"
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and I have "Flutter", do NOT write "React Native". But if the posting says
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"Flutter" or "Dart" or "WebSocket", use THAT EXACT WORD, not a synonym.
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2. DUAL FORM FOR ACRONYMS: e.g. "Continuous Integration / Continuous Deployment (CI/CD)".
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3. TITLE ALIGNMENT: the headline should mirror the posting's title when that title
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honestly describes my record and appears in ALLOWED TITLES.
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4. KEYWORD FREQUENCY: a critical keyword should appear 2-3 times across summary,
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skills and at least one experience bullet — always inside a real sentence.
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5. BULLET FORMULA: "Accomplished [X] as measured by [Y] by doing [Z]." Strong
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past-tense verb first. Outcome before task. A number beats an adjective.
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6. HARD SKILLS OVER SOFT SKILLS.
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=== STRICT INTEGRITY RULES — VIOLATION INVALIDATES THE OUTPUT ===
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A. NEVER invent a skill, employer, metric, date or certification.
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B. ALLOWED TITLES ONLY: {allowed}
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C. FORBIDDEN TITLES: {forbidden}
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D. NEVER CLAIM (no production experience): {never}
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E. Every number must be copied exactly from MY REAL DATA. No rounding, no new numbers.
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F. When rewriting an experience bullet you may change the WORDING to carry the
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job's keywords, but the FACTS, NUMBERS and SCOPE must remain identical to the
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original bullet you were given.
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=== MY REAL DATA ===
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NAME: {$id['fullName']}
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CURRENT POSITIONING: {$id['primaryTitle']} — {$id['positioningLine']}
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MASTER SUMMARY: {$profile['summary']}
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SKILLS (you may only select from these):
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{$skillsRef}
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EXPERIENCE (you may only rewrite these exact bullets):
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{$experienceRef}
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HONEST LIMITS: {limits}
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=== TARGET JOB ===
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Title: {$jobTitle}
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Description:
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{jobdesc}
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=== RETURN FORMAT ===
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Return ONLY raw JSON (no markdown fences) with EXACTLY these keys:
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{
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"headline": "One line. Title mirroring the job + 3-4 exact hard skills I truly have.",
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"summary": "3-4 sentences. Opens with what I built and the numbers. Mirrors the job's exact terminology.",
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"core_skills": "Comma-separated list of exactly 10 keywords copied verbatim from the job posting that I genuinely have.",
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"roles": [
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{
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"role_index": 0,
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"bullet_ids": ["0.0", "0.2"],
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"bullets": ["Rewritten text of bullet 0.0", "Rewritten text of bullet 0.2"]
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}
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],
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"ats_keywords_matched": ["exact terms from the posting that now appear in the CV"],
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"ats_keywords_missing": ["requirements from the posting I genuinely cannot claim"],
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"estimated_ats_score": 0
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}
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RULES FOR "roles":
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- Include EVERY role index that exists in MY REAL DATA, in the same order.
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- For each role select the 3-4 bullets MOST relevant to this job (fewer for the
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oldest role). "bullets" must align 1:1 with "bullet_ids".
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- Each rewritten bullet must stay factually identical to its original.
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PROMPT;
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$prompt = str_replace(
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['{allowed}', '{forbidden}', '{never}', '{limits}', '{jobdesc}'],
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[
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implode(', ', $profile['allowedTitles']),
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implode(', ', $profile['forbiddenTitles']),
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implode(', ', $bounds['neverClaim']),
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implode(' | ', $bounds['limitedIn']),
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mb_substr($jobDescription, 0, 6000)
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],
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$prompt
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);
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$res = callGemini(geminiUrl($MODELS['generatePdf'], $apiKey), [
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"contents" => [["parts" => [["text" => $prompt]]]],
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"generationConfig" => [
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"temperature" => 0.25,
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"maxOutputTokens" => 4096,
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"responseMimeType" => "application/json"
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]
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]);
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if ($res['code'] !== 200) {
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http_response_code(502);
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echo json_encode(["error" => "Gemini API Error", "details" => json_decode($res['body'])]);
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exit;
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}
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$responseData = json_decode($res['body'], true);
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$aiText = $responseData['candidates'][0]['content']['parts'][0]['text'] ?? '{}';
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$aiText = trim(str_replace(['```json', '```'], '', $aiText));
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$ai = json_decode($aiText, true) ?: [];
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// ── Server-side integrity guard ─────────────────────────────────────────
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// The model is instructed not to fabricate, but instruction-following is not
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// a guarantee. Anything it produces is scanned for terms I have no right to
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// claim; a hit means we fall back to the untailored master content rather
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// than ship a CV that will fail a technical screen.
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$violations = [];
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$haystack = strtolower(json_encode($ai, JSON_UNESCAPED_UNICODE));
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foreach (array_merge($bounds['neverClaim'], $profile['forbiddenTitles']) as $banned) {
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if (strpos($haystack, strtolower($banned)) !== false) {
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$violations[] = $banned;
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}
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}
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$integrityClean = empty($violations);
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$headline = ($integrityClean && !empty($ai['headline']))
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? $ai['headline']
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: $id['primaryTitle'] . ' — ' . $id['positioningLine'];
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$summary = ($integrityClean && !empty($ai['summary']))
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? $ai['summary']
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: $profile['summary'];
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if ($integrityClean && !empty($ai['core_skills'])) {
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$coreSkills = $ai['core_skills'];
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} else {
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// Fallback spreads across every skill group. Taking the first N of the
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// flattened list would just duplicate the "Mobile & Architecture" line
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// verbatim, wasting the most valuable slot on the page.
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$picked = [];
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foreach ($profile['skills'] as $items) {
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$picked = array_merge($picked, array_slice($items, 0, 3));
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}
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$coreSkills = implode(', ', array_slice($picked, 0, 10));
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}
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// ── Render blocks ───────────────────────────────────────────────────────
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// Contact details sit on separate block-level lines with explicit
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// separators. A bare <br> can collapse during text extraction and glue the
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// email to the LinkedIn URL, which loses the recruiter both.
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$contactBlock =
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'<div>' . e($id['location']) . ' | ' . e($id['phone'])
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. ' | ' . e($id['email']) . '</div>'
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. '<div>' . e($id['linkedin']) . ' | ' . e($id['portfolio'])
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. ' | ' . e($id['productSite']) . '</div>';
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// Metrics are rendered as one linear list. The master CV shows them as a
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// four-column band, which looks good to a human and extracts as garbage in
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// an ATS — this is the parser-safe equivalent of the same information.
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$achievements = '<ul>';
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foreach ($profile['headlineMetrics'] as $m) {
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$achievements .= '<li><strong>' . e($m['value']) . '</strong> — ' . e($m['label']) . '</li>';
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}
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foreach ($profile['achievementsAtAGlance'] as $a) {
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$achievements .= '<li>' . e($a) . '</li>';
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}
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$achievements .= '</ul>';
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$skillsBlock = '';
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foreach ($profile['skills'] as $group => $items) {
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$skillsBlock .= '<p class="skill-line"><span class="label">' . e($group) . ':</span> '
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. e(implode(', ', $items)) . '</p>';
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}
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// Index the AI's per-role selections so we can fall back role-by-role.
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$aiRoles = [];
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if ($integrityClean && !empty($ai['roles']) && is_array($ai['roles'])) {
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foreach ($ai['roles'] as $r) {
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if (isset($r['role_index'])) {
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$aiRoles[(int)$r['role_index']] = $r;
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}
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}
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}
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$experienceBlock = '';
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foreach ($profile['experience'] as $ri => $role) {
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$experienceBlock .= '<div class="job">';
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$experienceBlock .= '<p class="job-title">' . e($role['title']) . '</p>';
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$experienceBlock .= '<p class="job-company">' . e($role['company']) . ' — ' . e($role['location']) . '</p>';
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$experienceBlock .= '<p class="job-dates">' . e($role['start']) . ' – ' . e($role['end']) . '</p>';
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// Prefer the tailored rewrite; fall back to the master bullets whenever
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// the model returned nothing usable for this role.
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$bullets = [];
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if (isset($aiRoles[$ri]['bullets']) && is_array($aiRoles[$ri]['bullets'])) {
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foreach ($aiRoles[$ri]['bullets'] as $b) {
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$b = trim((string)$b);
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if ($b !== '') $bullets[] = $b;
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}
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}
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if (empty($bullets)) {
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foreach ($role['bullets'] as $b) {
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$bullets[] = $b['text'];
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}
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}
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$experienceBlock .= '<ul>';
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foreach ($bullets as $b) {
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$experienceBlock .= '<li>' . e($b) . '</li>';
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}
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$experienceBlock .= '</ul></div>';
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}
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$edu = $profile['education'];
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$educationBlock = '<p>' . e($edu['degree']) . ' — ' . e($edu['institution']) . '. ' . e($edu['note']) . '</p>';
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$certBlock = '<ul>';
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foreach ($profile['certifications'] as $c) {
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$certBlock .= '<li>' . e($c) . '</li>';
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}
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$certBlock .= '</ul>';
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$availability = $market === 'amman'
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? 'Based in Amman, Jordan. Available immediately for on-site, hybrid and remote roles.'
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: $id['availability'];
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$html = file_get_contents(__DIR__ . '/cv_template.html');
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$html = strtr($html, [
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'{{FULL_NAME}}' => e($id['fullName']),
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'{{JOB_HEADLINE}}' => e($headline),
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'{{CONTACT_BLOCK}}' => $contactBlock,
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'{{TAILORED_SUMMARY}}' => e($summary),
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'{{ACHIEVEMENTS_BLOCK}}' => $achievements,
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'{{DYNAMIC_SKILLS}}' => e($coreSkills),
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'{{SKILLS_BLOCK}}' => $skillsBlock,
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'{{EXPERIENCE_BLOCK}}' => $experienceBlock,
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'{{EDUCATION_BLOCK}}' => $educationBlock,
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'{{CERTIFICATIONS_BLOCK}}' => $certBlock,
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'{{LANGUAGES}}' => e($id['languages']),
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'{{LOCATION}}' => e($id['location']),
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'{{AVAILABILITY}}' => e($availability),
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]);
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try {
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$options = new Options();
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$options->set('isHtml5ParserEnabled', true);
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$options->set('defaultFont', 'Helvetica');
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$dompdf = new Dompdf($options);
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$dompdf->loadHtml($html, 'UTF-8');
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$dompdf->setPaper('A4', 'portrait');
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$dompdf->render();
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$pdfOutput = $dompdf->output();
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// ATS parsers key on the filename too — "Name - Role.pdf" reads cleanly.
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$safeName = preg_replace('/[^a-zA-Z0-9\-_ ]/', '', $id['fullName']);
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$safeTitle = preg_replace('/[^a-zA-Z0-9\-_ ]/', '', $jobTitle ?: 'CV');
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$safeTitle = trim(preg_replace('/\s+/', ' ', $safeTitle));
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$fileName = trim("{$safeName} - {$safeTitle}") . '.pdf';
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echo json_encode([
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"success" => true,
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"pdf" => base64_encode($pdfOutput),
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"filename" => $fileName,
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"ats" => [
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"score" => $ai['estimated_ats_score'] ?? null,
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"matched" => $ai['ats_keywords_matched'] ?? [],
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"missing" => $ai['ats_keywords_missing'] ?? [],
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"tailored" => $integrityClean && !empty($aiRoles),
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"violations" => $violations,
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]
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]);
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} catch (Exception $ex) {
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http_response_code(500);
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echo json_encode(["error" => "PDF Generation Failed", "details" => $ex->getMessage()]);
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}
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exit;
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}
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// ============================================================================
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// ACTION 2: Standard Proxy (text generation)
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// ============================================================================
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if ($action === 'generateText') {
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$prompt = $data['prompt'] ?? '';
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if (trim($prompt) === '') {
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http_response_code(400);
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echo json_encode(["error" => "prompt is required."]);
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exit;
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}
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$res = callGemini(geminiUrl($MODELS['generateText'], $apiKey), [
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"contents" => [["parts" => [["text" => $prompt]]]],
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"generationConfig" => ["temperature" => 0.6, "maxOutputTokens" => 8192]
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]);
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if ($res['code'] !== 200) {
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http_response_code($res['code'] ?: 502);
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echo $res['body'] ?: json_encode(["error" => $res['error'] ?: 'Upstream failure']);
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exit;
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}
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echo $res['body'];
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exit;
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}
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// ============================================================================
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// ACTION 3 & 4: Prompt-file backed generators (comment / repurpose)
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// ============================================================================
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$fileBacked = [
|
||
'generateComment' => ['file' => 'comment_prompt.txt', 'key' => 'comment', 'tokens' => 700, 'temp' => 0.8],
|
||
'repurposePost' => ['file' => 'repurpose_prompt.txt', 'key' => 'result', 'tokens' => 1200, 'temp' => 0.85],
|
||
];
|
||
|
||
if (isset($fileBacked[$action])) {
|
||
$cfg = $fileBacked[$action];
|
||
$postText = mb_substr($data['postText'] ?? '', 0, 3000);
|
||
|
||
if (trim($postText) === '') {
|
||
http_response_code(400);
|
||
echo json_encode(["error" => "postText is required."]);
|
||
exit;
|
||
}
|
||
|
||
$promptFile = __DIR__ . '/prompts/' . $cfg['file'];
|
||
if (!file_exists($promptFile)) {
|
||
http_response_code(500);
|
||
echo json_encode(["error" => "Prompt file {$cfg['file']} not found on server."]);
|
||
exit;
|
||
}
|
||
|
||
// Give the writer prompts the real identity instead of a stale copy baked
|
||
// into the text file. {{PROFILE}} is optional in the template.
|
||
$profile = loadProfile();
|
||
$promptTemplate = file_get_contents($promptFile);
|
||
$prompt = strtr($promptTemplate, [
|
||
'{{POST_TEXT}}' => $postText,
|
||
'{{PROFILE}}' => $profile['profileText'] ?? '',
|
||
'{{VOICE}}' => $profile['voice']['tone'] ?? '',
|
||
'{{BANNED}}' => implode(' / ', $profile['voice']['banned'] ?? []),
|
||
]);
|
||
|
||
$genConfig = [
|
||
"temperature" => $cfg['temp'],
|
||
"maxOutputTokens" => $cfg['tokens']
|
||
];
|
||
// The comment generator must return strict JSON; the repurposer returns prose.
|
||
if ($action === 'generateComment') {
|
||
$genConfig['responseMimeType'] = 'application/json';
|
||
}
|
||
|
||
$res = callGemini(geminiUrl($MODELS[$action], $apiKey), [
|
||
"contents" => [["parts" => [["text" => $prompt]]]],
|
||
"generationConfig" => $genConfig
|
||
]);
|
||
|
||
if ($res['code'] !== 200) {
|
||
http_response_code(502);
|
||
echo json_encode(["error" => "Gemini API Error", "details" => json_decode($res['body'])]);
|
||
exit;
|
||
}
|
||
|
||
$responseData = json_decode($res['body'], true);
|
||
$text = trim($responseData['candidates'][0]['content']['parts'][0]['text'] ?? '');
|
||
|
||
if ($text === '') {
|
||
http_response_code(502);
|
||
echo json_encode(["error" => "Empty result from AI."]);
|
||
exit;
|
||
}
|
||
|
||
echo json_encode(["success" => true, $cfg['key'] => $text]);
|
||
exit;
|
||
}
|
||
|
||
http_response_code(400);
|
||
echo json_encode(["error" => "Unknown action: " . $action]);
|