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More information: https://www.jsdelivr.com/using-sri-with-dynamic-files\n */\n","var pdfjs = require('pdfjs-dist-for-node/build/pdf.combined.js')\nvar altmetrics = require('beagle-altmetrics')\nvar _ = require('lodash')\nvar doiRegex = require('doi-regex')\n\nvar response\n\nvar altmetricsFromDoi = function (doi, cb) {\n response = true\n return altmetrics.getDataFromDoi(doi, function (err, data) {\n if (err !== null) {\n console.error(err)\n // TODO What does process do?\n // process.exit(-1)\n }\n\n return cb(null, data)\n })\n}\n\nvar getFingerprint = function (documentObject, cb) {\n if (!documentObject) throw new Error('No pdf provided')\n\n pdfjs.getDocument(documentObject).then(function (pdf) {\n return cb(null, pdf.fingerprint)\n }).catch(function (err) {\n return cb(err)\n })\n}\n\nvar getMetadata = function (documentObject, cb) {\n if (!documentObject) throw new Error('No pdf provided')\n\n pdfjs.getDocument(documentObject).then(function (pdf) {\n return pdf.getMetadata()\n }).then(function (data) {\n return cb(null, data)\n }).catch(function (err) {\n // Unable to get Document or metadata\n return cb(err)\n })\n}\n\nvar readPDFText = function (documentObject, options, cb) {\n if (!documentObject) throw new Error('No pdf provided')\n\n pdfjs.getDocument(documentObject).then(function (pdf) {\n var numPages = pdf.numPages\n // Define vars where they won't be redefined in each loop in if statements\n var doi\n var match\n var j = 0\n\n for (var i = 1; i <= numPages; i++) {\n pdf.getPage(i).then(function (page) {\n return page.getTextContent()\n }).then(function (textContent) {\n _.each(textContent.items, function (item) {\n // TODO match[2] tracks .t001, .g001, etc. Capture these, they may be relevant\n // to research.\n match = doiRegex.groups(item.str)\n if (match && !doi) {\n // Only call once, for now. TODO Multiple DOIs\n doi = match[1]\n if (options.modules.altmetrics) {\n altmetricsFromDoi(doi, cb)\n }\n }\n })\n j++\n if (j === numPages && !doi) {\n cb('Failed to find a DOI.')\n }\n }).catch(function (err) {\n return cb(err)\n })\n }\n }).catch(function (err) {\n // Unable to get document\n return cb(err)\n })\n}\n\nvar getHightlightCoords = function () {\n var pageIndex = window.PDFViewerApplication.pdfViewer.currentPageNumber - 1\n var page = window.PDFViewerApplication.pdfViewer.pages[pageIndex]\n var pageRect = page.canvas.getClientRects()[0]\n var selectionRects = window.getSelection().getRangeAt(0).getClientRects()\n var viewport = page.viewport\n var selected = _.map(selectionRects, function (r) {\n return viewport.convertToPdfPoint(r.left - pageRect.left, r.top - pageRect.top).concat(\n viewport.convertToPdfPoint(r.right - pageRect.left, r.bottom - pageRect.top))\n })\n return {page: pageIndex, coords: selected}\n}\n\nvar showHighlight = function (selected, cb) {\n var pageIndex = selected.page\n if (pageIndex === window.PDFViewerApplication.pdfViewer._currentPageNumber - 1) {\n var page = window.PDFViewerApplication.pdfViewer.pages[pageIndex]\n var pageElement = page.canvas.parentElement\n var viewport = page.viewport\n selected.coords.forEach(function (rect) {\n var bounds = viewport.convertToViewportRectangle(rect)\n var el = document.createElement('div')\n el.setAttribute('style', 'position: absolute; background-color: rgba(238, 170, 0, .2);' +\n 'left:' + Math.min(bounds[0], bounds[2]) + 'px; top:' + Math.min(bounds[1], bounds[3]) + 'px;' +\n 'width:' + Math.abs(bounds[0] - bounds[2]) + 'px; height:' + Math.abs(bounds[1] - bounds[3]) + 'px;')\n pageElement.appendChild(el)\n return cb && cb()\n })\n }\n return\n}\n\nexports.pdfjs = pdfjs\nexports.getFingerprint = getFingerprint\nexports.getMetadata = getMetadata\nexports.readPDFText = readPDFText\nexports.getHightlightCoords = getHightlightCoords\nexports.showHighlight = showHighlight\n"]}