Add research access buttons to Scholar results (DOI-focused Sci-Hub, Sci-DB, and title-based searches)
// ==UserScript==
// @name Scholar Access Enhancer
// @namespace http://tampermonkey.net/
// @version 1.0
// @description Add research access buttons to Scholar results (DOI-focused Sci-Hub, Sci-DB, and title-based searches)
// @author Adelyn Maisie
// @match https://scholar.google.com/*
// @icon https://www.google.com/s2/favicons?sz=64&domain=google.com
// @grant GM_addStyle
// @grant GM_setValue
// @grant GM_getValue
// @license AGPLv3
// ==/UserScript==
(function() {
'use strict';
// Configuration
const services = {
SciDB: {
name: 'Sci-DB',
color: '#a83293',
getUrl: (doi) => doi ? `https://annas-archive.org/scidb/${doi}` : null
},
AnnasArchive: {
name: "Anna's Archive",
color: '#FF5722',
getUrl: (title) => title ? `https://annas-archive.org/search?index=journals&q=${encodeURIComponent(title)}` : null
},
SciHub: {
name: 'Sci-Hub',
color: '#2c7bb6',
getUrl: (doi) => doi ? `https://sci-hub.st/${doi}` : null
},
LibGen: {
name: 'LibGen',
color: '#4CAF50',
getUrl: (title) => title ? `https://libgen.is/search.php?req=${encodeURIComponent(title)}` : null
}
};
// Settings system
let settings = GM_getValue('settings', {
SciDB: true,
AnnasArchive: true,
SciHub: true,
LibGen: true
});
// Stylish CSS
GM_addStyle(`
.access-btns {
display: flex;
flex-wrap: wrap; /* Allow buttons to wrap on smaller screens/results */
gap: 8px;
margin-top: 10px;
}
.access-btn {
padding: 6px 12px;
border: none;
border-radius: 15px;
color: white !important;
cursor: pointer;
font-size: 0.9em;
text-decoration: none !important;
text-align: center;
}
.settings-panel {
/* Ensure you have styles for this panel, e.g.: */
/* position: fixed; top: 20px; right: 20px; background: white; border: 1px solid #ccc; padding: 20px; z-index: 10000; display: none; box-shadow: 0 0 10px rgba(0,0,0,0.1); */
}
.settings-icon {
/* Ensure you have styles for this icon, e.g., for FontAwesome <i class="fas fa-cog"></i> */
/* position: fixed; top: 25px; right: 25px; font-size: 24px; cursor: pointer; z-index: 10001; color: #555; */
/* If using innerHTML for icon, you might need to style the <i> tag if FontAwesome isn't available */
}
`);
// Extract DOI
const extractDOIFromText = (text) => {
if (!text) return null;
const doiRegex = /(?:doi:|(?:https?:\/\/)?(?:dx\.)?doi\.org\/)?(10\.\d{4,9}\/(?:[-._;()/:A-Za-z0-9]|%[0-9a-fA-F]{2})+)/i;
const match = text.match(doiRegex);
if (match && match[1]) {
let potentialDoi = match[1];
potentialDoi = potentialDoi.replace(/%252F/gi, '%2F');
try {
potentialDoi = decodeURIComponent(potentialDoi);
} catch (e) {
potentialDoi = potentialDoi.replace(/%2F/gi, '/');
}
potentialDoi = potentialDoi.split(/[?#]/)[0];
potentialDoi = potentialDoi.replace(/(\/meta|\/pdf|\.pdf|\/html|\/full|\/fulltext|\/epdf|\/abstract|\/summary|\/xml)$/i, '');
if (/^10\.\d{4,9}\/.+$/i.test(potentialDoi)) {
return potentialDoi;
}
}
return null;
};
// New comprehensive DOI finder for a Google Scholar result item
const findDOIForResultItem = (resultItem) => {
const explicitDoiLink = resultItem.querySelector('a[href*="doi.org/10."], a[href*="dx.doi.org/10."]');
if (explicitDoiLink && explicitDoiLink.href) {
const doi = extractDOIFromText(explicitDoiLink.href);
if (doi) return doi;
}
const links = resultItem.querySelectorAll('a[href]');
for (const link of links) {
if (link.href) {
const doi = extractDOIFromText(link.href);
if (doi) return doi;
}
}
const titleText = resultItem.querySelector('.gs_rt')?.innerText || '';
const abstractText = resultItem.querySelector('.gs_rs')?.innerText || '';
const metadataText = resultItem.querySelector('.gs_a')?.innerText || '';
const combinedText = `${titleText} ${metadataText} ${abstractText}`;
const doiFromTextContent = extractDOIFromText(combinedText);
if (doiFromTextContent) return doiFromTextContent;
const resourceLink = resultItem.querySelector('.gs_ggsd a, .gs_or_ggsm a');
if (resourceLink && resourceLink.href) {
const doi = extractDOIFromText(resourceLink.href);
if (doi) return doi;
}
return null;
};
// Create settings panel using service keys
const createSettingsPanel = () => {
const panel = document.createElement('div');
panel.className = 'settings-panel';
Object.assign(panel.style, {
position: 'fixed', top: '70px', right: '20px', background: 'white',
border: '1px solid #ccc', padding: '20px', zIndex: '10000',
display: 'none', boxShadow: '0 0 10px rgba(0,0,0,0.1)'
});
panel.innerHTML = `<h3 style="margin: 0 0 15px 0; font-size: 1.2em; color: #333;">Research Access Settings</h3>`;
Object.entries(services).forEach(([key, service]) => {
const div = document.createElement('div');
div.style.margin = '10px 0';
div.innerHTML = `
<label style="display: flex; align-items: center; gap: 8px; font-size: 0.95em;">
<input type="checkbox" ${settings[key] ? 'checked' : ''}
data-service="${key}" style="margin-right: 5px; transform: scale(1.1);">
${service.name}
</label>
`;
panel.appendChild(div);
});
document.body.appendChild(panel);
return panel;
};
// Toggle settings panel
const createSettingsIcon = () => {
const icon = document.createElement('div');
icon.className = 'settings-icon';
Object.assign(icon.style, {
position: 'fixed', top: '20px', right: '20px', background: '#f0f0f0',
border: '1px solid #ccc', padding: '8px 10px', cursor: 'pointer',
zIndex: '10001', borderRadius: '5px', userSelect: 'none', color: '#333'
});
icon.innerHTML = '⚙️ Settings';
icon.addEventListener('click', (e) => {
e.stopPropagation();
settingsPanel.style.display = settingsPanel.style.display === 'block' ? 'none' : 'block';
});
document.body.appendChild(icon);
return icon;
};
const settingsPanel = createSettingsPanel();
const settingsIcon = createSettingsIcon();
// Handle settings changes
settingsPanel.querySelectorAll('input[type="checkbox"]').forEach(input => {
input.addEventListener('change', (e) => {
settings[e.target.dataset.service] = e.target.checked;
GM_setValue('settings', settings);
document.querySelectorAll('.access-btns').forEach(btnSet => btnSet.remove());
addAccessButtons();
});
});
// Main function to add buttons
const addAccessButtons = () => {
document.querySelectorAll('.gs_ri').forEach(result => {
if (result.querySelector('.access-btns')) return;
const titleElement = result.querySelector('.gs_rt a');
const title = titleElement ? titleElement.innerText.trim() : (result.querySelector('.gs_rt')?.innerText.trim() || '');
const doi = findDOIForResultItem(result);
const btnContainer = document.createElement('div');
btnContainer.className = 'access-btns';
Object.entries(services).forEach(([key, service]) => {
if (!settings[key]) return;
let identifier;
if (key === 'SciHub' || key === 'SciDB') {
identifier = doi;
} else {
identifier = title;
}
if (!identifier) return;
const url = service.getUrl(identifier);
if (!url) return;
const btn = document.createElement('a');
btn.className = 'access-btn';
btn.style.backgroundColor = service.color;
btn.href = url;
btn.target = '_blank';
btn.rel = 'noopener noreferrer';
btn.textContent = service.name;
btnContainer.appendChild(btn);
});
if (btnContainer.hasChildNodes()) {
result.appendChild(btnContainer);
}
});
};
let resultsContainer = document.getElementById('gs_res_ccl_mid') || document.getElementById('gs_res_ccl');
if (!resultsContainer) {
console.warn("Scholar Access Enhancer: Could not find specific results container. Observing document body.");
resultsContainer = document.body;
}
const observer = new MutationObserver(mutations => {
let needsButtonUpdate = false;
for (const mutation of mutations) {
if (mutation.addedNodes.length > 0) {
for (const node of mutation.addedNodes) {
if (node.nodeType === Node.ELEMENT_NODE) {
if (node.matches && (node.matches('.gs_ri') || node.querySelector('.gs_ri'))) {
needsButtonUpdate = true;
break;
}
}
}
}
if (needsButtonUpdate) {
break;
}
}
if (needsButtonUpdate) {
addAccessButtons();
}
});
observer.observe(resultsContainer, {
childList: true,
subtree: true
});
addAccessButtons();
document.addEventListener('click', (e) => {
if (settingsPanel.style.display === 'block' && !settingsPanel.contains(e.target) && !settingsIcon.contains(e.target)) {
settingsPanel.style.display = 'none';
}
});
})();