add OOP scraping

scripts/reader.js

@@ -2,3 +2,62 @@
 Read the contents of the page.  
 */
 
+export default class reader {
+	constructor(scraper_fields) {
+		let field_content;
+
+		if (Array.isArray(scraper_fields)) {
+			// Convert scraper_fields to a dictionary.
+			let scraper_fields_all = {};
+
+			for (let field_index = 0; field_index < scraper_fields.length; field_index++) {
+				scraper_fields_all[field_index] = scraper_fields[field_index];
+			}
+
+			scraper_fields = scraper_fields_all;
+		};
+		if (typeof scraper_fields === "object" && scraper_fields != null && scraper_fields) {
+
+			/* Read for the particular fields. */
+			function read(fields) {
+				let field_names = Object.keys(fields), field_data = {};
+
+				for (let field_index = 0; field_index < fields.length; field_index++) {
+					let field_current = fields[field_names[field_index]];
+
+					if (field_current) {
+						// Check if array.
+						if (Array.isArray(field_current)) {
+							field_data[field_names[field_index]] = [];
+
+							
+							if (typeof field_current[0] === "object" && field_current[0] != null && field_current[0]) {
+								field_data[field_names[field_index]].push(read(field_current[0]));
+							} else {
+								let matching_elements = (document.querySelectorAll(field_current[0]));
+
+								for (let field_current_index = 0; field_current_index < matching_elements.length; field_current_index++) {
+									field_data[field_names[field_index]].push(matching_elements[field_current_index].innerText);
+								};
+							};
+						} else if (typeof field_current === "object" && field_current != null && field_current) {
+							field_data[field_names[field_index]] = read(field_current);
+						} else {
+							field_data[field_names[field_index]] = (document.querySelector(field_current)) ? document.querySelector(field_current).innerText : null;
+						};
+					};
+				};
+
+				return field_data;
+			};
+
+			field_content = read(scraper_fields);
+		}
+
+		if (Object.keys(field_content).length > 0) {
+			for (let field_name in Object.keys(field_content)) {
+				this[field_name] = field_content[field_name];
+			}
+		}
+	}
+}