feat: wrap scrape & scrapeSchema in IIFE

This commit is contained in:
karishmas6
2024-08-02 19:07:18 +05:30
parent 2aa7cdc4bc
commit 8540905192

View File

@@ -130,58 +130,65 @@ function scrapableHeuristics(maxCountPerPage = 50, minArea = 20000, scrolls = 3,
* Returns a "scrape" result from the current page.
* @returns {Array<Object>} *Curated* array of scraped information (with sparse rows removed)
*/
function scrape(selector = null) {
// Wrap the entire function in an IIFE (Immediately Invoked Function Expression)
// and attach it to the window object
(function(window) {
/**
* **crudeRecords** contains uncurated rundowns of "scrapable" elements
* @type {Array<Object>}
* Returns a "scrape" result from the current page.
* @returns {Array<Object>} *Curated* array of scraped information (with sparse rows removed)
*/
const crudeRecords = (selector
? Array.from(document.querySelectorAll(selector))
: scrapableHeuristics())
.map((record) => ({
...Array.from(record.querySelectorAll('img'))
.reduce((p, x, i) => {
let url = null;
if (x.srcset) {
const urls = x.srcset.split(', ');
[url] = urls[urls.length - 1].split(' ');
}
window.scrape = function(selector = null) {
/**
* **crudeRecords** contains uncurated rundowns of "scrapable" elements
* @type {Array<Object>}
*/
const crudeRecords = (selector
? Array.from(document.querySelectorAll(selector))
: scrapableHeuristics())
.map((record) => ({
...Array.from(record.querySelectorAll('img'))
.reduce((p, x, i) => {
let url = null;
if (x.srcset) {
const urls = x.srcset.split(', ');
[url] = urls[urls.length - 1].split(' ');
}
/**
* Contains the largest elements from `srcset` - if `srcset` is not present, contains
* URL from the `src` attribute
*
* If the `src` attribute contains a data url, imgUrl contains `undefined`.
*/
let imgUrl;
if (x.srcset) {
imgUrl = url;
} else if (x.src.indexOf('data:') === -1) {
imgUrl = x.src;
}
/**
* Contains the largest elements from `srcset` - if `srcset` is not present, contains
* URL from the `src` attribute
*
* If the `src` attribute contains a data url, imgUrl contains `undefined`.
*/
let imgUrl;
if (x.srcset) {
imgUrl = url;
} else if (x.src.indexOf('data:') === -1) {
imgUrl = x.src;
}
return ({
return ({
...p,
...(imgUrl ? { [`img_${i}`]: imgUrl } : {}),
});
}, {}),
...record.innerText.split('\n')
.reduce((p, x, i) => ({
...p,
...(imgUrl ? { [`img_${i}`]: imgUrl } : {}),
});
}, {}),
...record.innerText.split('\n')
.reduce((p, x, i) => ({
...p,
[`record_${String(i).padStart(4, '0')}`]: x.trim(),
}), {}),
}));
[`record_${String(i).padStart(4, '0')}`]: x.trim(),
}), {}),
}));
return crudeRecords;
}
return crudeRecords;
};
/**
/**
* Given an object with named lists of elements,
* groups the elements by their distance in the DOM tree.
* @param {Object.<string, object[]>} lists The named lists of HTML elements.
* @returns {Array.<Object.<string, string>>}
*/
function scrapeSchema(lists) {
window.scrapeSchema = function (lists) {
function omap(object, f, kf = (x) => x) {
return Object.fromEntries(
Object.entries(object)
@@ -224,3 +231,6 @@ function scrapeSchema(lists) {
(listOfElements) => listOfElements.find((elem) => mbe.contains(elem))?.innerText,
));
}
})(window);