MediaWiki:ChapterSlides.js

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// Acht feste Illustratoren definieren
const illustrators = [
  "Kemble",
  "Schroedter",
  "Hirth",
  "Busoni",
  "Kellerer",
  "Harder",
  "Trier",
  "Bebié"
];

// Bildlisten und aktuelle Indizes
let slides = {};
let currentIndex = {};

illustrators.forEach(name => {
  slides[name] = [];
  currentIndex[name] = 0;
});

// Eingabe verarbeiten
function loadSlideshowsByChapter() {
  const chapterInput = document.getElementById("chapterInput").value.trim();
  const chapterNumber = parseInt(chapterInput, 10);

  if (isNaN(chapterNumber) || chapterNumber < 1 || chapterNumber > 43) {
    alert("Please enter a number between 1 and 43.");
    return;
  }

  const chapterTag = "ch" + String(chapterNumber).padStart(3, "0");

  // Tabelle durchsuchen
  const rows = document.querySelectorAll("#catalog tbody tr");

  illustrators.forEach(name => {
    slides[name] = [];
    currentIndex[name] = 0;
    const imageElement = document.getElementById("slide-" + name);

    for (let i = 0; i < rows.length; i++) {
      const row = rows[i];
      const illustratorCell = row.cells[2];
      const idCell = row.cells[8];

      const illustratorText = illustratorCell ? illustratorCell.textContent.trim().toLowerCase() : "";
      const idLink = idCell ? idCell.getElementsByTagName("a")[0] : null;
      const idText = idLink ? idLink.textContent.trim().toLowerCase() : "";

      if (
        illustratorText.indexOf(name.toLowerCase()) !== -1 &&
        idText.indexOf(chapterTag) !== -1
      ) {
        slides[name].push(idText);
      }
    }

    if (slides[name].length === 0) {
      imageElement.src = "https://illus.twainframe.org/images/2/2b/ChapterPlaceholder.png";
      imageElement.title = "No matching images found.";
      updateCounter(name); // Counter aktualisieren
    } else {
      showSlide(name, 0);
    }
  });
}

// Ein Bild anzeigen
function showSlide(illustrator, index) {
  const imageElement = document.getElementById("slide-" + illustrator);
  const slideArray = slides[illustrator];

  if (!imageElement || slideArray.length === 0) return;

  currentIndex[illustrator] = (index + slideArray.length) % slideArray.length;
  const imageId = slideArray[currentIndex[illustrator]];

  imageElement.src = "/index.php/Special:Redirect/file/" + imageId + ".jpg";
  imageElement.alt = imageId;
  imageElement.title = imageId;

  // Klick öffnet File-Seite
  imageElement.onclick = function() {
    window.open("/File:" + imageId + ".jpg", "_blank");
  };

  // Hover-Popup für MediaInfo
  attachMediaInfoHoverDynamic(imageElement, imageId);

  // Counter aktualisieren
  updateCounter(illustrator);
}

// Counter aktualisieren
function updateCounter(illustrator) {
  const counterElement = document.getElementById("counter-" + illustrator);
  const slideArray = slides[illustrator];
  const index = currentIndex[illustrator];

  if (counterElement) {
    if (slideArray.length === 0) {
      counterElement.textContent = "0/0";
    } else {
      counterElement.textContent = (index + 1) + "/" + slideArray.length;
    }
  }
}

// Buttons
function nextSlide(illustrator) {
  showSlide(illustrator, currentIndex[illustrator] + 1);
}

function prevSlide(illustrator) {
  showSlide(illustrator, currentIndex[illustrator] - 1);
}

// ===============================
// MediaInfo Hover Popup (File-Seite, Raw-Text)
// ===============================
function attachMediaInfoHoverDynamic(imgElement) {
    if (!imgElement) return;

// Wenn Platzhalter → kein Hover-Popup
    if (imgElement.alt === "" || imgElement.alt === "placeholder") {
        return;
    }


    let infoBox = document.createElement('div');
    infoBox.style.position = 'absolute';
    infoBox.style.display = 'none';
    infoBox.style.backgroundColor = "#f9f9f9";
    infoBox.style.border = "1px solid #ccc";
    infoBox.style.padding = "0.5em 1em";
    infoBox.style.borderRadius = "4px";
    infoBox.style.fontSize = "0.9em";
    infoBox.style.zIndex = 1000;
    infoBox.style.pointerEvents = "none"; // damit Hover nicht gestört wird
    document.body.appendChild(infoBox);

    imgElement.addEventListener('mouseenter', () => {
    	 // Browser Tooltip deaktivieren
    imgElement.removeAttribute('title');
        const filename = imgElement.alt; // img alt sollte Dateiname ohne .jpg sein
        infoBox.textContent = "Loading ...";

        fetch('/index.php?title=File:' + encodeURIComponent(filename) + ".jpg" + '&action=raw')
        .then(resp => resp.text())
        .then(text => {
            const match = text.match(/\{\{MediaInfo([\s\S]*?)\}\}/);
            if (!match) {
                infoBox.textContent = "No Data found.";
                return;
            }

            const block = match[1];
            const fields = ["title","chapter","illustration","illustrator","year","tags"];
            let htmlList = "<ul style='margin:0; padding-left:1em; list-style:none;'>";

            fields.forEach(field => {
                const m = block.match(new RegExp("\\|\\s*" + field + "\\s*=([^\\n]*)"));
                if (m) {
                    const label = field.charAt(0).toUpperCase() + field.slice(1);
                    htmlList += `<li><b>${label}:</b> ${m[1].trim()}</li>`;
                }
            });

            htmlList += "</ul>";
            infoBox.innerHTML = htmlList;
        })
        .catch(err => {
            console.error(err);
            infoBox.textContent = "Error";
        });

        infoBox.style.display = 'block';
    });

    imgElement.addEventListener('mousemove', (e) => {
        infoBox.style.top = (e.pageY + 15) + 'px';
        infoBox.style.left = (e.pageX + 15) + 'px';
    });

    imgElement.addEventListener('mouseleave', () => {
        infoBox.style.display = 'none';
    });

}