jalil.arfaoui.net/src/components/photo/Lightbox.astro

---
import { getCollection } from 'astro:content';

interface Props {
  images: { src: string; alt: string; title?: string }[];
  albumTitle?: string;
  showCategory?: boolean;
  category?: string;
}

const { images, albumTitle = '', showCategory = false, category = '' } = Astro.props;

const imagesForJS = JSON.stringify(images);

// Construire les labels depuis la collection
const photoCategories = await getCollection('photoCategories');
const categoryLabels: Record<string, string> = {
  'blog': 'Fil Photo',
  ...Object.fromEntries(photoCategories.map(cat => [cat.id, cat.data.title]))
};
---

<div id="lightbox" class="lightbox hidden">
  <div class="lightbox-controls">
    <button class="lightbox-fullscreen" aria-label="Plein écran">
      <svg width="20" height="20" viewBox="0 0 24 24" fill="none">
        <path d="M8 3H5a2 2 0 0 0-2 2v3m18 0V5a2 2 0 0 0-2-2h-3m0 18h3a2 2 0 0 0 2-2v-3M3 16v3a2 2 0 0 0 2 2h3" stroke="white" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
      </svg>
    </button>
    <button class="lightbox-close" aria-label="Fermer">
      <svg width="20" height="20" viewBox="0 0 24 24" fill="none">
        <path d="M18 6L6 18M6 6l12 12" stroke="white" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
      </svg>
    </button>
  </div>

  <button class="lightbox-prev" aria-label="Image précédente">
    <svg width="24" height="24" viewBox="0 0 24 24" fill="none">
      <path d="M15 18L9 12L15 6" stroke="white" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
    </svg>
  </button>
  <button class="lightbox-next" aria-label="Image suivante">
    <svg width="24" height="24" viewBox="0 0 24 24" fill="none">
      <path d="M9 18L15 12L9 6" stroke="white" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
    </svg>
  </button>

  <div class="lightbox-image-container">
    <img id="lightbox-image" class="lightbox-image" src="" alt="" />
  </div>

  <div class="lightbox-bottom-bar">
    <div class="lightbox-info">
      <span id="lightbox-title" class="info-title"></span>
      {showCategory && (
        <>
          <span class="info-separator">•</span>
          <span id="lightbox-category" class="info-category"></span>
        </>
      )}
      <span class="info-separator">•</span>
      <span id="lightbox-counter" class="info-counter"></span>
    </div>
  </div>
</div>

<script define:vars={{ imagesForJS, albumTitle, showCategory, category, categoryLabels }}>
  window.lightboxData = {
    images: JSON.parse(imagesForJS),
    albumTitle,
    showCategory,
    category,
    categoryLabels
  };
</script>

<script>
declare global {
  interface Window {
    lightboxData?: {
      images: { src: string; alt: string; title?: string; category?: string }[];
      albumTitle: string;
      showCategory: boolean;
      category: string;
      categoryLabels: Record<string, string>;
    };
  }
}

class Lightbox {
  images: { src: string; alt: string; title?: string; category?: string }[] = [];
  currentIndex = 0;
  lightbox: HTMLElement | null;
  lightboxImage: HTMLImageElement | null;
  lightboxTitle: HTMLElement | null;
  lightboxCategory: HTMLElement | null;
  lightboxCounter: HTMLElement | null;
  albumTitle = '';
  showCategory = false;
  category = '';
  categoryLabels: Record<string, string> = {};

  constructor() {
    this.lightbox = document.getElementById('lightbox');
    this.lightboxImage = document.getElementById('lightbox-image') as HTMLImageElement | null;
    this.lightboxTitle = document.getElementById('lightbox-title');
    this.lightboxCategory = document.getElementById('lightbox-category');
    this.lightboxCounter = document.getElementById('lightbox-counter');

    this.init();
  }

  init() {
    if (window.lightboxData) {
      this.images = window.lightboxData.images;
      this.albumTitle = window.lightboxData.albumTitle;
      this.showCategory = window.lightboxData.showCategory;
      this.category = window.lightboxData.category;
      this.categoryLabels = window.lightboxData.categoryLabels;
    }
    this.bindEvents();
  }

  bindEvents() {
    // Clic sur les éléments de galerie (thumbnails ou gallery-items)
    document.querySelectorAll('.thumbnail-link, .gallery-item').forEach((item, index) => {
      item.addEventListener('click', (e) => {
        e.preventDefault();
        this.openLightbox(index);
      });
    });

    document.querySelector('.lightbox-close')?.addEventListener('click', () => this.closeLightbox());
    document.querySelector('.lightbox-fullscreen')?.addEventListener('click', () => this.toggleFullscreen());
    document.querySelector('.lightbox-prev')?.addEventListener('click', () => this.prevImage());
    document.querySelector('.lightbox-next')?.addEventListener('click', () => this.nextImage());

    // Fermer en cliquant sur le fond
    this.lightbox?.addEventListener('click', (e) => {
      if (e.target === this.lightbox || (e.target as HTMLElement).classList.contains('lightbox-image-container')) {
        this.closeLightbox();
      }
    });

    document.addEventListener('keydown', (e) => {
      if (!this.lightbox?.classList.contains('hidden')) {
        switch(e.key) {
          case 'Escape': this.closeLightbox(); break;
          case 'ArrowLeft': this.prevImage(); break;
          case 'ArrowRight': this.nextImage(); break;
        }
      }
    });
  }

  openLightbox(index: number) {
    this.currentIndex = index;
    this.updateLightboxContent();
    this.lightbox?.classList.remove('hidden');
    document.body.style.overflow = 'hidden';
  }

  closeLightbox() {
    this.lightbox?.classList.add('hidden');
    document.body.style.overflow = '';
  }

  updateLightboxContent() {
    const image = this.images[this.currentIndex];
    if (image && this.lightboxImage) {
      this.lightboxImage.src = image.src;
      this.lightboxImage.alt = image.alt;

      // Titre: soit le titre de l'image, soit le titre de l'album
      if (this.lightboxTitle) {
        this.lightboxTitle.textContent = image.title || this.albumTitle;
      }

      // Catégorie (optionnel)
      if (this.showCategory && this.lightboxCategory) {
        const cat = image.category || this.category;
        this.lightboxCategory.textContent = this.categoryLabels[cat] || cat;
      }

      // Compteur
      if (this.lightboxCounter) {
        this.lightboxCounter.textContent = `${this.currentIndex + 1} / ${this.images.length}`;
      }
    }
  }

  nextImage() {
    this.currentIndex = (this.currentIndex + 1) % this.images.length;
    this.updateLightboxContent();
  }

  prevImage() {
    this.currentIndex = (this.currentIndex - 1 + this.images.length) % this.images.length;
    this.updateLightboxContent();
  }

  toggleFullscreen() {
    const fullscreenBtn = document.querySelector('.lightbox-fullscreen svg');

    if (!document.fullscreenElement) {
      this.lightbox?.requestFullscreen?.();
      if (fullscreenBtn) {
        fullscreenBtn.innerHTML = '<path d="M8 3v3a2 2 0 0 1-2 2H3m18 0h-3a2 2 0 0 1-2-2V3m0 18v-3a2 2 0 0 1 2-2h3M3 16h3a2 2 0 0 1 2 2v3" stroke="white" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>';
      }
    } else {
      document.exitFullscreen?.();
      if (fullscreenBtn) {
        fullscreenBtn.innerHTML = '<path d="M8 3H5a2 2 0 0 0-2 2v3m18 0V5a2 2 0 0 0-2-2h-3m0 18h3a2 2 0 0 0 2-2v-3M3 16v3a2 2 0 0 0 2 2h3" stroke="white" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>';
      }
    }
  }
}

document.addEventListener('DOMContentLoaded', () => new Lightbox());
</script>

<style>
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #000;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.lightbox.hidden {
  display: none;
}

.lightbox-image-container {
  position: relative;
  width: 100%;
  height: calc(100% - 50px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  cursor: pointer;
}

.lightbox-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
  cursor: default;
}

.lightbox-controls {
  position: absolute;
  top: 20px;
  right: 20px;
  display: flex;
  align-items: center;
  gap: 15px;
  z-index: 10001;
}

.lightbox-fullscreen,
.lightbox-close {
  background: none;
  border: none;
  color: white;
  cursor: pointer;
  opacity: 0.8;
  transition: opacity 0.3s;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
}

.lightbox-fullscreen:hover,
.lightbox-close:hover {
  opacity: 1;
}

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.3);
  border: none;
  color: white;
  cursor: pointer;
  padding: 30px 20px;
  z-index: 10000;
  transition: background 0.3s;
}

.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(0, 0, 0, 0.5);
}

.lightbox-prev {
  left: 0;
}

.lightbox-next {
  right: 0;
}

.lightbox-prev svg,
.lightbox-next svg {
  width: 30px;
  height: 30px;
}

.lightbox-bottom-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50px;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  padding: 0 20px;
  color: white;
}

.lightbox-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}

.info-separator {
  opacity: 0.5;
}
</style>