MediaWiki:Gadget-LabelScan.js
Hinweis: Leere nach dem Veröffentlichen den Browser-Cache, um die Änderungen sehen zu können.
- Firefox/Safari: Umschalttaste drücken und gleichzeitig Aktualisieren anklicken oder entweder Strg+F5 oder Strg+R (⌘+R auf dem Mac) drücken
- Google Chrome: Umschalttaste+Strg+R (⌘+Umschalttaste+R auf dem Mac) drücken
- Edge: Strg+F5 drücken oder Strg drücken und gleichzeitig Aktualisieren anklicken
/* global mw, Tesseract */
(function(){
'use strict';
// Lädt Gadget nur, wenn der Scan-Block vorhanden ist.
function hasUI(){
return !!document.getElementById('ados-scan-run') &&
!!document.getElementById('ados-scan-file');
}
// --- UI Helpers ---
function setStatus(t){ var el = document.getElementById('ados-scan-status'); if(el) el.textContent = t || ''; }
function setProgress(p){
var bar = document.getElementById('ados-scan-progress');
if(!bar) return;
if(p == null){ bar.style.display='none'; bar.value=0; }
else { bar.style.display=''; bar.value = Math.max(0, Math.min(1, p)); }
}
function showPreview(file){
var url = URL.createObjectURL(file);
var prev = document.getElementById('ados-scan-preview');
if(prev){
prev.innerHTML =
'<img alt="Vorschau" src="'+url+'">';
prev.setAttribute('aria-hidden','false');
}
}
// --- Tesseract nur bei Bedarf laden ---
var tesseractReady;
function ensureTesseract(){
if (tesseractReady) return tesseractReady;
tesseractReady = new Promise(function(resolve, reject){
if (window.Tesseract) return resolve();
var s = document.createElement('script');
s.src = 'https://cdn.jsdelivr.net/npm/tesseract.js@5/dist/tesseract.min.js';
s.async = true;
s.onload = resolve;
s.onerror = function(){
var s2 = document.createElement('script');
s2.src = 'https://unpkg.com/tesseract.js@5/dist/tesseract.min.js';
s2.async = true;
s2.onload = resolve;
s2.onerror = function(){ reject(new Error('Tesseract konnte nicht geladen werden')); };
document.head.appendChild(s2);
};
document.head.appendChild(s);
});
return tesseractReady;
}
// --- OCR + Heuristik ---
async function runOCR(file){
await ensureTesseract();
setProgress(0);
var res = await Tesseract.recognize(file,'deu+eng',{
logger: function(m){
if(m && m.status === 'recognizing text' && typeof m.progress === 'number'){
setProgress(m.progress);
}
}
});
setProgress(null);
return (res && res.data && res.data.text) || '';
}
function extractHints(text){
var raw = String(text||'').replace(/\s+/g,' ').trim();
var wordRe = new RegExp('\\b[A-ZÄÖÜ][A-Za-zÄÖÜäöüß\\-]{3,}\\b','g');
var w = []; var m;
while ((m = wordRe.exec(raw)) !== null) { if (w.indexOf(m[0]) < 0) w.push(m[0]); }
w = w.slice(0, 6);
var ageRe = new RegExp('\\b([1-9]\\d?)\\s?(?:years?|yo|jahr|jahre)\\b','gi');
var ages=[]; while ((m = ageRe.exec(raw)) !== null) { var n=(m[0].match(/[1-9]\d?/)||[])[0]; if(n && ages.indexOf(n)<0) ages.push(n); }
var yearRe = new RegExp('\\b(19|20)\\d{2}\\b','g');
var years=[]; while ((m = yearRe.exec(raw)) !== null) { if (years.indexOf(m[0])<0) years.push(m[0]); }
return { words: w, ages: ages, years: years };
}
function buildSearchQuery(h){
var parts = [];
(h.words||[]).forEach(function(w){ parts.push('"'+w+'"'); });
(h.ages||[]).forEach(function(a){ parts.push('"'+a+'"'); });
(h.years||[]).forEach(function(y){ parts.push('"'+y+'"'); });
if (!parts.length) parts.push('Whisky');
return parts.join(' ');
}
// --- Wiki-Suche ---
async function searchWiki(query, limit){
await mw.loader.using('mediawiki.api');
var api = new mw.Api();
var res = await api.get({
action: 'query',
list: 'search',
srsearch: query,
srlimit: limit || 12,
srwhat: 'text',
formatversion: 2
});
return (res.query && res.query.search) || [];
}
function esc(s){ return mw.html.escape(String(s||'')); }
function renderResults(items){
var box = document.getElementById('ados-scan-results');
if (!box) return;
box.innerHTML = '';
if (!items || !items.length){
box.innerHTML = '<div class="ados-hit">Keine klaren Treffer. Bitte anderes Foto oder manuell suchen.</div>';
return;
}
items.slice(0,12).forEach(function(it){
var title = it.title || '';
var link = mw.util.getUrl(title.replace(/ /g,'_'));
var snip = String(it.snippet||'').replace(/<\/?span[^>]*>/g,'').replace(/"/g,'"');
var div = document.createElement('div');
div.className = 'ados-hit';
div.innerHTML =
'<b><a href="'+link+'">'+esc(title)+'</a></b>' +
(snip ? '<div class="meta">'+snip+'</div>' : '');
box.appendChild(div);
});
}
// --- Bindung ---
var BOUND = false;
function bind(){
if (BOUND || !hasUI()) return;
var runBtn = document.getElementById('ados-scan-run');
var fileIn = document.getElementById('ados-scan-file');
var bigBtn = document.getElementById('ados-scan-bigbtn');
if (!runBtn || !fileIn) return;
if (runBtn.dataset.bound === '1') return;
runBtn.dataset.bound = '1'; BOUND = true;
if (bigBtn) bigBtn.addEventListener('click', function(){ fileIn.click(); });
fileIn.addEventListener('change', function(){
if (this.files && this.files[0]) showPreview(this.files[0]);
});
runBtn.addEventListener('click', async function(ev){
ev.preventDefault();
if (!(fileIn.files && fileIn.files[0])){ alert('Bitte ein Foto auswählen oder aufnehmen.'); return; }
var f = fileIn.files[0];
try{
runBtn.disabled = true; runBtn.textContent = 'Erkenne …';
setStatus('Erkenne Label …');
var text = await runOCR(f);
setStatus('Suche im Wiki …');
var hints = extractHints(text);
var query = buildSearchQuery(hints);
var hits = await searchWiki(query, 12);
renderResults(hits);
setStatus('Fertig.');
} catch (e){
console.error('[LabelScan]', e);
setStatus('Fehler bei Erkennung/Suche. Bitte erneut versuchen.');
} finally {
runBtn.disabled = false; runBtn.textContent = 'Erkennen & suchen';
}
});
// Sicherheit gegen Overlays
var wrap = document.getElementById('ados-labelscan');
if (wrap) wrap.style.position = 'relative';
runBtn.style.position = 'relative';
runBtn.style.zIndex = '9999';
runBtn.style.pointerEvents = 'auto';
}
// Erstbindung + Fallbacks + Observer (auch für Mobile/VE)
if (document.readyState === 'loading'){
document.addEventListener('DOMContentLoaded', bind);
} else {
bind();
}
setTimeout(bind, 250);
setTimeout(bind, 1000);
var mo = new MutationObserver(function(){ if (!BOUND) bind(); });
mo.observe(document.documentElement || document.body, { childList:true, subtree:true });
})();