feat: separate table and non-table data logic
This commit is contained in:
RohitR311
@@ -262,84 +262,206 @@ function scrapableHeuristics(maxCountPerPage = 50, minArea = 20000, scrolls = 3,
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* @returns {Array.<Array.<Object>>} Array of arrays of scraped items, one sub-array per list
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* @returns {Array.<Array.<Object>>} Array of arrays of scraped items, one sub-array per list
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*/
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*/
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window.scrapeList = async function ({ listSelector, fields, limit = 10 }) {
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window.scrapeList = async function ({ listSelector, fields, limit = 10 }) {
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const tableFields = {};
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// Helper function to extract values from elements
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const nonTableFields = {};
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function extractValue(element, attribute) {
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if (!element) return null;
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for (const [label, field] of Object.entries(fields)) {
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if (['TD', 'TH', 'TR'].includes(field.tag)) {
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tableFields[label] = field;
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} else {
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nonTableFields[label] = field;
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}
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}
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const parentElements = Array.from(document.querySelectorAll(listSelector));
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const scrapedData = [];
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for (const parent of parentElements) {
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// Get the first field's elements to determine how many items we have
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const firstField = Object.values(fields)[0];
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const baseElements = Array.from(parent.querySelectorAll(firstField.selector));
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// Process each item up to the limit
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if (attribute === 'innerText') {
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for (let i = 0; i < Math.min(baseElements.length, limit); i++) {
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return element.innerText.trim();
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const record = {};
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} else if (attribute === 'innerHTML') {
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return element.innerHTML.trim();
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// Process table fields
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} else if (attribute === 'src' || attribute === 'href') {
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for (const [label, { selector, attribute }] of Object.entries(tableFields)) {
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const attrValue = element.getAttribute(attribute);
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const elements = Array.from(parent.querySelectorAll(selector));
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return attrValue ? new URL(attrValue, window.location.origin).href : null;
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// Use the same index to maintain correspondence between fields
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const element = elements[i];
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if (element) {
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let value;
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if (attribute === 'innerText') {
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value = element.innerText.trim();
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} else if (attribute === 'innerHTML') {
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value = element.innerHTML.trim();
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} else if (attribute === 'src' || attribute === 'href') {
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const attrValue = element.getAttribute(attribute);
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value = attrValue ? new URL(attrValue, window.location.origin).href : null;
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} else {
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value = element.getAttribute(attribute);
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}
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record[label] = value;
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}
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}
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// Process non-table fields
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for (const [label, { selector, attribute }] of Object.entries(nonTableFields)) {
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const elements = Array.from(parent.querySelectorAll(selector));
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// Use the same index to maintain correspondence between fields
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const element = elements[i];
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if (element) {
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let value;
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if (attribute === 'innerText') {
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value = element.innerText.trim();
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} else if (attribute === 'innerHTML') {
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value = element.innerHTML.trim();
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} else if (attribute === 'src' || attribute === 'href') {
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const attrValue = element.getAttribute(attribute);
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value = attrValue ? new URL(attrValue, window.location.origin).href : null;
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} else {
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value = element.getAttribute(attribute);
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}
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record[label] = value;
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}
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}
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if (Object.keys(record).length > 0) {
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scrapedData.push(record);
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}
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}
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if (scrapedData.length >= limit) {
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scrapedData.length = limit;
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break;
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}
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}
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return element.getAttribute(attribute);
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}
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}
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// Helper function to find table ancestors
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function findTableAncestor(element) {
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let currentElement = element;
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const MAX_DEPTH = 5;
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let depth = 0;
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while (currentElement && depth < MAX_DEPTH) {
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if (currentElement.tagName === 'TD') {
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return { type: 'TD', element: currentElement };
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} else if (currentElement.tagName === 'TR') {
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return { type: 'TR', element: currentElement };
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}
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currentElement = currentElement.parentElement;
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depth++;
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}
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return null;
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}
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function getCellIndex(td) {
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let index = 0;
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let sibling = td;
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while (sibling = sibling.previousElementSibling) {
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index++;
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}
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return index;
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}
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function hasThElement(row, tableFields) {
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for (const [label, { selector }] of Object.entries(tableFields)) {
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const element = row.querySelector(selector);
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if (element) {
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let current = element;
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while (current && current !== row) {
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if (current.tagName === 'TH') {
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return true;
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}
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current = current.parentElement;
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}
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}
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}
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return false;
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}
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function filterRowsBasedOnTag(rows, tableFields) {
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for (const row of rows) {
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if (hasThElement(row, tableFields)) {
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return rows;
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}
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}
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return rows.filter(row => row.getElementsByTagName('TH').length === 0);
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}
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// Get all containers that match the listSelector
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const containers = Array.from(document.querySelectorAll(listSelector));
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if (containers.length === 0) return [];
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// Initialize arrays to store field classifications for each container
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const containerFields = containers.map(() => ({
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tableFields: {},
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nonTableFields: {}
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}));
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// Analyze field types for each container
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containers.forEach((container, containerIndex) => {
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for (const [label, field] of Object.entries(fields)) {
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const sampleElement = container.querySelector(field.selector);
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if (sampleElement) {
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const ancestor = findTableAncestor(sampleElement);
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if (ancestor) {
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containerFields[containerIndex].tableFields[label] = {
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...field,
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tableContext: ancestor.type,
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cellIndex: ancestor.type === 'TD' ? getCellIndex(ancestor.element) : -1
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};
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} else {
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containerFields[containerIndex].nonTableFields[label] = field;
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}
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} else {
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containerFields[containerIndex].nonTableFields[label] = field;
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}
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}
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});
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const tableData = [];
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const nonTableData = [];
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// Process table fields across all containers
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for (let containerIndex = 0; containerIndex < containers.length; containerIndex++) {
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const container = containers[containerIndex];
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const { tableFields } = containerFields[containerIndex];
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if (Object.keys(tableFields).length > 0) {
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const firstField = Object.values(tableFields)[0];
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const firstElement = container.querySelector(firstField.selector);
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let tableContext = firstElement;
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while (tableContext && tableContext.tagName !== 'TABLE' && tableContext !== container) {
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tableContext = tableContext.parentElement;
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}
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if (tableContext) {
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const rows = Array.from(tableContext.getElementsByTagName('TR'));
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const processedRows = filterRowsBasedOnTag(rows, tableFields);
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for (let rowIndex = 0; rowIndex < processedRows.length; rowIndex++) {
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const record = {};
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const currentRow = processedRows[rowIndex];
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for (const [label, { selector, attribute, cellIndex }] of Object.entries(tableFields)) {
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let element = null;
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if (cellIndex >= 0) {
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const td = currentRow.children[cellIndex];
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if (td) {
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element = td.querySelector(selector);
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if (!element && selector.split(">").pop().includes('td:nth-child')) {
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element = td;
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}
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if (!element) {
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const tagOnlySelector = selector.split('.')[0];
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element = td.querySelector(tagOnlySelector);
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}
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if (!element) {
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let currentElement = td;
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while (currentElement && currentElement.children.length > 0) {
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let foundContentChild = false;
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for (const child of currentElement.children) {
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if (extractValue(child, attribute)) {
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currentElement = child;
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foundContentChild = true;
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break;
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}
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}
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if (!foundContentChild) break;
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}
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element = currentElement;
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}
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}
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} else {
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element = currentRow.querySelector(selector);
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}
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if (element) {
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record[label] = extractValue(element, attribute);
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}
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}
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if (Object.keys(record).length > 0) {
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tableData.push(record);
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}
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}
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}
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}
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}
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// Process non-table fields across all containers
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for (let containerIndex = 0; containerIndex < containers.length; containerIndex++) {
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if (nonTableData.length >= limit) break;
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const container = containers[containerIndex];
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const { nonTableFields } = containerFields[containerIndex];
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if (Object.keys(nonTableFields).length > 0) {
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const record = {};
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for (const [label, { selector, attribute }] of Object.entries(nonTableFields)) {
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const element = container.querySelector(selector);
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if (element) {
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record[label] = extractValue(element, attribute);
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}
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}
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if (Object.keys(record).length > 0) {
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nonTableData.push(record);
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}
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}
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}
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// Merge and limit the results
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const scrapedData = [...tableData, ...nonTableData];
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return scrapedData;
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return scrapedData;
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};
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};
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