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rewrite load PDF metadata without .then() chain

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This commit is contained in:
Gabriel Poma 2025-06-27 12:47:35 +02:00
commit 30415262a3
1 changed files with 42 additions and 41 deletions
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75
public/js/metadata.js
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@ -22,50 +22,49 @@ function responsiveDisplay() {
async function loadPDF(pdfBlob) {
showLoading('Loading')
let filename = pdfBlob.name;
let url = await URL.createObjectURL(pdfBlob);
const filename = pdfBlob.name;
const url = URL.createObjectURL(pdfBlob);
document.title = filename + ' - ' + document.title;
document.querySelector('#text_document_name span').innerText = filename;
pdffile = pdfBlob
let loadingTask = pdfjsLib.getDocument(url);
document.querySelector('#text_document_name span').innerText = filename;
await loadingTask.promise.then(function(pdf) {
pdf.getMetadata().then(function(metadata) {
for(fieldKey in defaultFields) {
addMetadata(fieldKey, null, defaultFields[fieldKey]['type'], false);
}
for(metaKey in metadata.info) {
if(metaKey == "Custom" || metaKey == "PDFFormatVersion" || metaKey.match(/^Is/) || metaKey == "Trapped") {
continue;
}
addMetadata(metaKey, metadata.info[metaKey], "text", false);
}
const loadingTask = pdfjsLib.getDocument(url);
const pdf = await loadingTask.promise;
const metadata = await pdf.getMetadata()
for(metaKey in metadata.info.Custom) {
if(metaKey == "sha256") {
continue;
}
for(fieldKey in defaultFields) {
addMetadata(fieldKey, null, defaultFields[fieldKey]['type'], false);
}
addMetadata(metaKey, metadata.info.Custom[metaKey], "text", false);
}
for(metaKey in metadata.info) {
if(metaKey == "Custom" || metaKey == "PDFFormatVersion" || metaKey.match(/^Is/) || metaKey == "Trapped") {
continue;
}
addMetadata(metaKey, metadata.info[metaKey], "text", false);
}
for(let pageNumber = 1; pageNumber <= pdf.numPages; pageNumber++ ) {
pdf.getPage(pageNumber).then(function(page) {
let pageIndex = (page.pageNumber - 1);
pages[pageIndex] = page;
pageRender(pageIndex);
});
}
if(document.querySelector('.input-metadata input')) {
document.querySelector('.input-metadata input').focus();
} else {
document.getElementById('input_metadata_key').focus();
}
for(metaKey in metadata.info.Custom) {
if(metaKey == "sha256") {
continue;
}
addMetadata(metaKey, metadata.info.Custom[metaKey], "text", false);
}
for(let pageNumber = 1; pageNumber <= pdf.numPages; pageNumber++ ) {
pdf.getPage(pageNumber).then(function(page) {
let pageIndex = (page.pageNumber - 1);
pages[pageIndex] = page;
pageRender(pageIndex);
});
}, function (reason) {
console.error(reason);
});
}
if(document.querySelector('.input-metadata input')) {
document.querySelector('.input-metadata input').focus();
} else {
document.getElementById('input_metadata_key').focus();
}
endLoading();
@ -319,7 +318,9 @@ async function pageMetadata(url) {
responsiveDisplay();
createEventsListener();
await convertInputFileImagesToPDF(document.getElementById('input_pdf_upload'));
loadPDF(document.getElementById('input_pdf_upload').files[0]);
await loadPDF(document.getElementById('input_pdf_upload').files[0]).catch(function (reason) {
console.error(reason);
});
};