이미지 자동 생성과 특성 이미지

// AI 이미지 생성 핵심 클래스 class MAP_AI_Image_Generator { private $api_key; private $default_style; private $default_quality; public function __construct() { $this->api_key = get_option('map_openai_api_key'); $this->default_style = get_option('map_image_style', 'modern'); $this->default_quality = get_option('map_image_quality', 'standard'); } // ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ // DALL-E 3로 이미지 생성 // ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ public function generate_dalle($prompt, $options = []) { $defaults = [ 'size' => '1792x1024', // 블로그 와이드 비율 'quality' => $this->default_quality, // standard 또는 hd 'style' => 'natural', // natural 또는 vivid 'model' => 'dall-e-3', ]; $opts = wp_parse_args($options, $defaults); $response = wp_remote_post('https://api.openai.com/v1/images/generations', [ 'headers' => [ 'Authorization' => 'Bearer ' . $this->api_key, 'Content-Type' => 'application/json', ], 'body' => wp_json_encode([ 'model' => $opts['model'], 'prompt' => $prompt, 'n' => 1, 'size' => $opts['size'], 'quality' => $opts['quality'], 'style' => $opts['style'], 'response_format' => 'url', ]), 'timeout' => 90, ]); if (is_wp_error($response)) { error_log('[AI Image] DALL-E 오류: ' . $response->get_error_message()); return false; } $code = wp_remote_retrieve_response_code($response); $body = json_decode(wp_remote_retrieve_body($response), true); if ($code !== 200) { $error = $body['error']['message'] ?? '알 수 없는 오류'; error_log("[AI Image] DALL-E HTTP {$code}: {$error}"); return false; } return [ 'url' => $body['data'][0]['url'] ?? false, 'revised_prompt' => $body['data'][0]['revised_prompt'] ?? '', ]; } // Stable Diffusion API로 이미지 생성 (Stability AI) public function generate_stable_diffusion($prompt, $options = []) { $sd_key = get_option('map_stability_api_key'); if (!$sd_key) return false; $defaults = [ 'width' => 1344, 'height' => 768, 'steps' => 30, 'cfg_scale' => 7, 'engine' => 'stable-diffusion-xl-1024-v1-0', ]; $opts = wp_parse_args($options, $defaults); $response = wp_remote_post( "https://api.stability.ai/v1/generation/{$opts['engine']}/text-to-image", [ 'headers' => [ 'Authorization' => 'Bearer ' . $sd_key, 'Content-Type' => 'application/json', 'Accept' => 'application/json', ], 'body' => wp_json_encode([ 'text_prompts' => [ ['text' => $prompt, 'weight' => 1], ['text' => 'blurry, text, watermark, low quality, deformed', 'weight' => -1], ], 'width' => $opts['width'], 'height' => $opts['height'], 'steps' => $opts['steps'], 'cfg_scale' => $opts['cfg_scale'], 'samples' => 1, ]), 'timeout' => 90, ] ); if (is_wp_error($response)) return false; $body = json_decode(wp_remote_retrieve_body($response), true); $base64 = $body['artifacts'][0]['base64'] ?? null; if (!$base64) return false; // base64를 임시 파일로 저장 $tmp_file = wp_tempnam('sd_image_') . '.png'; file_put_contents($tmp_file, base64_decode($base64)); return ['file' => $tmp_file, 'type' => 'file']; } // 블로그 주제에 맞는 이미지 프롬프트 자동 생성 public function create_blog_image_prompt($title, $style = null) { $style = $style ?: $this->default_style; $styles = [ 'modern' => 'clean modern flat illustration, minimalist design, soft gradient colors, geometric shapes', 'photo' => 'professional stock photo style, high quality, well lit, shallow depth of field', 'abstract' => 'abstract geometric art, vibrant colors, contemporary design, flowing shapes', 'isometric' => 'isometric 3D illustration, pastel colors, tech themed, clean background', 'watercolor' => 'watercolor painting style, soft edges, artistic, delicate colors', 'gradient' => 'beautiful gradient background, abstract, minimal with subtle tech elements', 'line_art' => 'clean line art illustration, single color, white background, professional', ]; $style_desc = $styles[$style] ?? $styles['modern']; return sprintf( "Blog featured image for article titled '%s'. Style: %s. IMPORTANT: No text, no letters, no words, no watermarks in the image. Wide landscape aspect ratio suitable for blog header. Professional and visually appealing.", sanitize_text_field($title), $style_desc ); } // AI로 스마트 프롬프트 생성 (글 내용 분석 기반) public function create_smart_prompt($post_id, $style = null) { $post = get_post($post_id); if (!$post) return false; $connector = new MAP_AI_Connector(); $excerpt = mb_substr(strip_tags($post->post_content), 0, 500); $result = $connector->call( 'You are an expert at creating DALL-E image prompts for blog featured images.', sprintf( "Create a DALL-E 3 prompt for a blog featured image. Blog title: %s Content excerpt: %s Style preference: %s Requirements: - No text or letters in the image - Wide landscape format (16:9) - Professional and clean - Visually represents the topic Respond with ONLY the prompt text, nothing else.", $post->post_title, $excerpt, $style ?: $this->default_style ), 0.8, 300 ); return $result['content'] ?? $this->create_blog_image_prompt($post->post_title, $style); } }