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const {
Builder,
By
} = require('selenium-webdriver');
const {
readFile,
writeFile
} = require('fs');
const driver_pause = 500; // milliseconds
const sample_line_char_max = 100; // characters
const target_browser = 'chrome';
// GENERAL UTILITY FUNCTIONS
function log_read(content) {
process.stdout.write("reading " + content + "...");
}
function log_snippet(result) {
let ellipse = result.length > sample_line_char_max;
let i = sample_line_char_max;
if (ellipse) {
while (result[i] != " " && i < -1) {
i--;
}
}
console.log(` "${result.substring(0, i + 1).trim()}${ellipse ? "..." : ""}"`);
}
// DRIVER UTILITY FUNCTIONS
async function navigate_to(url) {
await driver.get(url);
await driver.sleep(driver_pause);
}
async function click_on(xpath) {
await driver.findElement(By.xpath(xpath)).click();
await driver.sleep(driver_pause);
}
// TEXT SCRAPING
async function read_title() {
log_read("title");
let title_el = await driver.findElement(By.xpath('//*[@id="divmain"]/div/h1'));
let title = await title_el.getText();
log_snippet(title);
return title;
}
async function read_abstract() {
log_read("abstract");
let lines = [];
let webElements = await driver.findElements(By.id("abstract-body"));
for (let el of webElements) {
let text = await el.getText();
lines.push(text);
}
let abstract = lines.join(" ");
log_snippet(abstract);
return abstract;
}
async function read_authors() {
log_read("authors");
await click_on('//*[@id="tab-1014-btnInnerEl"]/span');
let authors_el = await driver.findElement(By.xpath('//*[@id="tabpanel-1009-body"]'));
let authors = await authors_el.getText();
let sanitize = line => line.length > 0 && !(line.startsWith("No contact information") || line.startsWith("View colleagues of") || line.startsWith("Bibliometrics:"));
let author_lines = authors.split("\n").map(line => line.trim()).filter(sanitize);
let all_authors = [];
let i = 0;
while (i < author_lines.length) {
let individual = [];
while (!author_lines[i].startsWith("Average citations")) {
individual.push(author_lines[i]);
i++;
}
individual.push(author_lines[i]);
all_authors.push(individual);
i++;
}
let multiple = all_authors.length == 1 ? "" : " et al.";
log_snippet(all_authors[0][0] + multiple);
return all_authors;
}
// JSON / DASH CONVERSION AND EXPORT
function parse_authors(metadata) {
let publicationYears = metadata[1].substring(18).split("-");
author = {
name: metadata[0],
publication_start: parseInt(publicationYears[0]),
publication_end: parseInt(publicationYears[1])
};
for (let count = 2; count < metadata.length; count++) {
let attr = metadata[count];
let char = attr.length - 1;
while (attr[char] != " ") {
char--;
}
let key = attr.substring(0, char).toLowerCase().replace(/ /g, "_").replace(/[\(\)]/g, "");
let value = parseFloat(attr.substring(char + 1).replace(/,/g, ""));
author[key] = value;
}
return author;
}
function write_results() {
let output = "";
results.forEach(res => output += (JSON.stringify(res, null, 4) + "\n"));
writeFile("./results.txt", output, function errorHandler(exception) {
console.log(exception || "scraped references successfully written as JSON to ./results.txt\n");
});
}
async function scrape_targets(error, data) {
if (error) {
console.log("\nUnable to collect target citations from a citations.txt file stored in this directory.\nPlease make sure one is provided.");
return;
}
let references = data.split("\n").map(entry => entry.replace("\r", "")).filter(line => line.match(/\d+/g));
let quota = references.length;
console.log(`${references.join(", ")}\n`);
driver = await new Builder().forBrowser(target_browser).build();
for (let i = 0; i < quota; i++) {
let result = {};
try {
let url = `https://dl.acm.org/citation.cfm?id=${references[i]}`;
await navigate_to(url);
console.log(`scraping ${i + 1}/${quota} (${url})`);
result.url = url;
result.title = await read_title();
result.abstract = await read_abstract();
result.authors = (await read_authors()).map(parse_authors);
} catch (e) {
console.log(e);
await driver.quit();
}
results.push(result);
console.log();
}
write_results();
await driver.quit();
}
let driver;
let results = [];
console.log("reading references...");
readFile("./citations.txt", {
encoding: "utf8"
}, scrape_targets);
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