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googleIt.js
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/* eslint-disable no-console */
/* eslint-disable array-callback-return */
const request = require('request');
const fs = require('fs');
const querystring = require('querystring');
const cheerio = require('cheerio');
require('colors');
const { exec } = require('child_process');
const {
getDefaultRequestOptions,
getTitleSelector,
getLinkSelector,
getSnippetSelector,
getResultStatsSelector,
getResultCursorSelector,
logIt,
saveToFile,
saveResponse,
} = require('./utils');
export function errorTryingToOpen(error, stdout, stderr) {
if (error) {
console.log(`Error trying to open link in browser: ${error}`);
console.log(`stdout: ${stdout}`);
console.log(`stderr: ${stderr}`);
}
}
export function openInBrowser(open, results) {
if (open !== undefined) {
// open is the first X number of links to open
results.slice(0, open).forEach((result) => {
exec(`open ${result.link}`, errorTryingToOpen);
});
}
}
export function getSnippet(elem) {
// recursive function to get "all" the returned data from Google
function findData(child) {
if (!child.data) {
return child.children.map((c) => c.data || findData(c));
}
return child.data;
}
// Issue with linter wanting "new" before "Array"
// in this case, the casting is legit, we don't want a new array
// eslint-disable-next-line unicorn/new-for-builtins
return elem.children && elem.children.length > 0 ? elem.children.map((child) => Array(findData(child)).join('')).join('') : '';
}
export function display(results, disableConsole, onlyUrls) {
logIt('\n', disableConsole);
results.forEach((result) => {
if (onlyUrls) {
logIt(result.link.green, disableConsole);
} else if (result.title) {
logIt(result.title.blue, disableConsole);
logIt(result.link.green, disableConsole);
logIt(result.snippet, disableConsole);
logIt('\n', disableConsole);
} else {
logIt('Result title is undefined.');
}
});
}
export const parseGoogleSearchResultUrl = (url) => {
if (!url) {
return undefined;
}
if (url.charAt(0) === '/') {
return querystring.parse(url).url;
}
return url;
};
export function getResults({
data,
noDisplay,
disableConsole,
onlyUrls,
titleSelector,
linkSelector,
snippetSelector,
resultStatsSelector,
cursorSelector,
}) {
const $ = cheerio.load(data);
let results = [];
const titles = $(getTitleSelector(titleSelector)).contents();
titles.each((index, elem) => {
if (elem.data) {
results.push({ title: elem.data });
} else {
results.push({ title: elem.children[0].data });
}
});
$(getLinkSelector(linkSelector)).map((index, elem) => {
if (index < results.length) {
results[index] = Object.assign(results[index], {
link: parseGoogleSearchResultUrl(elem.attribs.href),
});
}
});
$(getSnippetSelector(snippetSelector)).map((index, elem) => {
if (index < results.length) {
results[index] = Object.assign(results[index], {
snippet: getSnippet(elem),
});
}
});
if (onlyUrls) {
results = results.map((r) => ({ link: r.link }));
}
if (!noDisplay) {
display(results, disableConsole, onlyUrls);
}
const resultStats = $(getResultStatsSelector(resultStatsSelector)).html() || '';
const approximateResults = ((resultStats.split(' results') || [''])[0].split('About ')[1] || '').replace(',', '');
const seconds = parseFloat((resultStats.split(' (')[1] || '').split(' seconds')[0]);
const cursor = $(getResultCursorSelector(cursorSelector)).html() || '';
const page = parseInt(cursor.split('</span>')[1], 10);
const stats = {
page,
approximateResults,
seconds,
};
return { results, stats };
}
export function getResponse({
fromFile: filePath,
fromString,
options,
htmlFileOutputPath,
query,
limit,
userAgent,
start,
includeSites,
excludeSites,
}) {
// eslint-disable-next-line consistent-return
return new Promise((resolve, reject) => {
if (filePath) {
fs.readFile(filePath, (err, data) => {
if (err) {
return reject(new Error(`Erorr accessing file at ${filePath}: ${err}`));
}
return resolve({ body: data });
});
} else if (fromString) {
return resolve({ body: fromString });
}
const defaultOptions = getDefaultRequestOptions({
limit, query, userAgent, start, includeSites, excludeSites,
});
request({ ...defaultOptions, ...options }, (error, response, body) => {
if (error) {
return reject(new Error(`Error making web request: ${error}`));
}
saveResponse(response, htmlFileOutputPath);
return resolve({ body, response });
});
});
}
function googleIt(config) {
const {
output,
open,
returnHtmlBody,
titleSelector,
linkSelector,
snippetSelector,
resultStatsSelector,
cursorSelector,
start,
diagnostics,
} = config;
return new Promise((resolve, reject) => {
getResponse(config).then(({ body, response }) => {
const { results, stats } = getResults({
data: body,
noDisplay: config['no-display'],
disableConsole: config.disableConsole,
onlyUrls: config['only-urls'],
titleSelector,
linkSelector,
snippetSelector,
resultStatsSelector,
cursorSelector,
start,
});
const { statusCode } = response;
if (results.length === 0 && statusCode !== 200 && !diagnostics) {
reject(new Error(`Error in response: statusCode ${statusCode}. To see the raw response object, please include the 'diagnostics: true' as part of the options object (or -d if using command line)`));
}
saveToFile(output, results);
openInBrowser(open, results);
if (returnHtmlBody || diagnostics) {
return resolve({
results, body, response, stats,
});
}
return resolve(results);
}).catch(reject);
});
}
export default googleIt;