wip scraping infra

src/shared/types/Course.ts

@@ -1,29 +1,45 @@
 import { Serialized } from 'chrome-extension-toolkit';
+import { CourseSchedule } from './CourseSchedule';
 
-type CourseSchedule = {};
-
-type Professor = {
+/**
+ * A professor's name, first name, and initial (if applicable)
+ * Also includes a link to their RateMyProfessor page
+ */
+export type Instructor = {
     name: string;
     firstName?: string;
-    initial?: string;
+    lastName?: string;
+    middleInitial?: string;
+    rateMyProfessorURL?: string;
 };
 
-type InstructionMode = 'Online' | 'In Person' | 'Hybrid';
+/**
+ * Whether the class is taught online, in person, or a hybrid of the two
+ */
+export type InstructionMode = 'Online' | 'In Person' | 'Hybrid';
 
-type Links = {
+export type Links = {
     syllabi?: string;
     textbook?: string;
-    rateMyProfessor?: string;
     eCIS?: string;
 };
 
+export enum Status {
+    OPEN = 'OPEN',
+    CLOSED = 'CLOSED',
+    WAITLISTED = 'WAITLISTED',
+    CANCELLED = 'CANCELLED',
+}
+
 export class Course {
     uniqueId: number;
     number: string;
     name: string;
     department: string;
-    professor: Professor;
-    description?: string;
+    status: Status;
+    instructors: Instructor[];
+    isReserved: boolean;
+    description: string[];
     schedule: CourseSchedule;
     currentStatus: string;
     url: string;
@@ -36,3 +52,8 @@ export class Course {
         Object.assign(this, course);
     }
 }
+
+export type CourseRow = {
+    rowElement: HTMLTableRowElement;
+    course: Course;
+};

src/shared/types/CourseSchedule.ts

@@ -0,0 +1,29 @@
+import { Serialized } from 'chrome-extension-toolkit';
+
+type Day = 'M' | 'T' | 'W' | 'TH' | 'F' | 'S' | 'SU';
+
+type Room = {
+    building: string;
+    number: string;
+};
+
+type CourseSection = {
+    day: Day;
+    startTime: number;
+    endTime: number;
+    room?: Room;
+};
+
+export class CourseSchedule {
+    sections: CourseSection[];
+
+    constructor(courseSchedule: CourseSchedule | Serialized<CourseSchedule>) {
+        Object.assign(this, courseSchedule);
+    }
+
+    static parse(days: Day[] , times, hours): CourseSchedule {}
+
+    toString(): string {
+        return '';
+    }
+}

src/views/components/CourseCatalogMain.tsx

@@ -1,6 +1,8 @@
 import React, { useEffect, useMemo, useState } from 'react';
 import ReactDOM from 'react-dom';
-import { Course } from 'src/shared/types/Course';
+import { Course, CourseRow, CourseScraper } from 'src/shared/types/Course';
+import { CourseCatalogDetailsScraper } from 'src/shared/types/CourseCatalogDetailsScraper';
+import { CourseCatalogRowScraper } from 'src/shared/types/CourseCatalogRowScraper';
 import useInfiniteScroll from '../hooks/useInfiniteScroll';
 import { populateSearchInputs } from '../lib/courseCatalog/populateSearchInputs';
 import { SiteSupport } from '../lib/getSiteSupport';
@@ -15,7 +17,7 @@ interface Props {
  * This is the top level react component orchestrating the course catalog page.
  */
 export default function CourseCatalogMain({ support }: Props) {
-    const [rows, setRows] = React.useState<HTMLTableRowElement[]>([]);
+    const [rows, setRows] = React.useState<CourseRow[]>([]);
     const [selectedCourse, setSelectedCourse] = useState<Course | null>(null);
 
     const isScrolling = useInfiniteScroll(async () => {
@@ -28,7 +30,7 @@ export default function CourseCatalogMain({ support }: Props) {
     }, []);
 
     useEffect(() => {
-        const rows = scrapeRowsFromCourseTable();
+        const rows = scrapeCourseRows(support);
         setRows(rows);
     }, []);
 
@@ -40,23 +42,44 @@ export default function CourseCatalogMain({ support }: Props) {
         <div>
             <TableHead>Plus</TableHead>
             {rows.map(row => (
-                <TableRow row={row} onClick={handleRowButtonClick} />
+                <TableRow element={row.rowElement} support={support} onClick={handleRowButtonClick} />
             ))}
             {isScrolling && <div>Scrolling...</div>}
         </div>
     );
 }
 
-function scrapeRowsFromCourseTable(): HTMLTableRowElement[] {
-    const rows = Array.from(document.querySelectorAll('table tbody tr')) as HTMLTableRowElement[];
+function scrapeCourseRows(support: SiteSupport): CourseRow[] {
+    const rows: CourseRow[] = [];
 
-    return Array.from(rows).filter(row => {
-        if (row.querySelector('th')) {
-            return false;
+    let name: string | null = null;
+    if (support === SiteSupport.COURSE_CATALOG_DETAILS) {
+        const header = document.querySelector('#details h2');
+        if (!header?.textContent) {
+            throw new Error('Could not find course name on course details page.');
         }
-        if (row.querySelector('td.course_header')) {
-            return false;
+        name = header.textContent.trim();
     }
-        return true;
+
+    document.querySelectorAll<HTMLTableRowElement>('table tbody tr').forEach(row => {
+        // rows that have a course header are the start of a new section, so save the section name and skip
+        const header = row.querySelector('td.course_header');
+        if (header?.textContent) {
+            name = header.textContent.trim();
+            return;
+        }
+        if (!name) {
+            throw new Error('Could not find any course sections.');
+        }
+
+        const course = scrapeCourseFromRow(name, support, row);
     });
+    return rows;
+}
+
+function scrapeCourseFromRow(name: string, support: SiteSupport, row: HTMLTableRowElement): Course {
+    let url = support === SiteSupport.COURSE_CATALOG_DETAILS ? window.location.href : null;
+
+
+    
 }

src/views/components/injected/TableRow.tsx

@@ -1,10 +1,12 @@
 import React, { useEffect, useState } from 'react';
 import ReactDOM from 'react-dom';
 import { Course } from 'src/shared/types/Course';
+import { SiteSupport } from 'src/views/lib/getSiteSupport';
 import { Button } from '../common/Button/Button';
 
 interface Props {
-    row: HTMLTableRowElement;
+    support: SiteSupport;
+    element: HTMLTableRowElement;
     onClick: (course: Course) => void;
 }
 
@@ -12,21 +14,20 @@ interface Props {
  * This component is injected into each row of the course catalog table.
  * @returns a react portal to the new td in the column or null if the column has not been created yet.
  */
-export default function TableRow({ row, onClick }: Props): JSX.Element | null {
+export default function TableRow({ support, element, onClick }: Props): JSX.Element | null {
     const [container, setContainer] = useState<HTMLTableCellElement | null>(null);
     const [course, setCourse] = useState<Course | null>(null);
 
     useEffect(() => {
         const portalContainer = document.createElement('td');
-        const lastTableCell = row.querySelector('td:last-child');
+        const lastTableCell = element.querySelector('td:last-child');
         lastTableCell!.after(portalContainer);
         setContainer(portalContainer);
     }, []);
 
     useEffect(() => {
-        const course = scrapeCourseFromRow(row);
         setCourse(course);
-    }, [row]);
+    }, [element]);
 
     if (!container || !course) {
         return null;
@@ -38,7 +39,3 @@ export default function TableRow({ row, onClick }: Props): JSX.Element | null {
 
     return ReactDOM.createPortal(<Button onClick={handleOnClick}>Plus</Button>, container);
 }
-
-function scrapeCourseFromRow(row): Course {
-    return null as any;
-}

src/views/lib/courseCatalog/CourseScraper.ts

@@ -0,0 +1,131 @@
+import { Instructor, Status } from 'src/shared/types/Course';
+import { SiteSupport } from 'src/views/lib/getSiteSupport';
+
+enum TableDataSelector {
+    UNIQUE_ID = 'td[data-th="Unique"]',
+    REGISTER_URL = 'td[data-th="Add"] a',
+    INSTRUCTORS = 'td[data-th="Instructor"] span',
+    STATUS = 'td[data-th="Status"]',
+    SCHEDULE_DAYS = 'td[data-th="Days"]>span',
+    SCHEDULE_HOURS = 'td[data-th="Hour"]>span',
+    SCHEDULE_ROOM = 'td[data-th="Room"]>span',
+    FLAGS = 'td[data-th="Flags"] ul li',
+}
+
+enum CatalogDetailsSelector {
+    COURSE_NAME = '#details h2',
+    COURSE_DESCRIPTION = '#details p',
+}
+
+export class CourseScraper {
+    support: SiteSupport;
+    row: HTMLTableRowElement;
+
+    constructor(support: SiteSupport, row: HTMLTableRowElement) {
+        this.support = support;
+        this.row = row;
+    }
+
+    scrapeUniqueId(): number {
+        const div = this.row.querySelector(TableDataSelector.UNIQUE_ID);
+        if (!div) {
+            throw new Error('Unique ID not found');
+        }
+        return Number(div.textContent);
+    }
+
+    scrapeInstructors(): Instructor[] {
+        const spans = this.row.querySelectorAll(TableDataSelector.INSTRUCTORS);
+        const names = Array.from(spans)
+            .map(span => span.textContent || '')
+            .map(name => name.trim())
+            .filter(Boolean);
+
+        return names.map(name => {
+            const [lastName, rest] = name.split(',');
+            const [firstName, middleInitial] = rest.split(' ');
+
+            return {
+                name,
+                firstName,
+                lastName,
+                middleInitial,
+            };
+        });
+    }
+
+    scrapeName(): string {
+        const div = document.querySelector(CatalogDetailsSelector.COURSE_NAME);
+        if (!div) {
+            throw new Error('Course name not found');
+        }
+        return div.textContent || '';
+    }
+
+    scrapeRegisterURL(): string | undefined {
+        const a = this.row.querySelector<HTMLAnchorElement>(TableDataSelector.REGISTER_URL);
+        return a?.href;
+    }
+
+    scrapeStatus(): [status: Status, isReserved: boolean] {
+        const div = this.row.querySelector(TableDataSelector.STATUS);
+        if (!div) {
+            throw new Error('Status not found');
+        }
+        const text = (div.textContent || '').trim().toLowerCase();
+        if (!text) {
+            throw new Error('Status not found');
+        }
+        const isReserved = text.includes('reserved');
+
+        if (text.includes('open')) {
+            return [Status.OPEN, isReserved];
+        }
+        if (text.includes('closed')) {
+            return [Status.CLOSED, isReserved];
+        }
+        if (text.includes('waitlisted')) {
+            return [Status.WAITLISTED, isReserved];
+        }
+        if (text.includes('cancelled')) {
+            return [Status.CANCELLED, isReserved];
+        }
+        throw new Error(`Unknown status: ${text}`);
+    }
+
+    scrapeFlags(): string[] {
+        const lis = this.row.querySelectorAll(TableDataSelector.FLAGS);
+        return Array.from(lis).map(li => li.textContent || '');
+    }
+
+    scrapeDescription(): string[] {
+        const lines = document.querySelectorAll(CatalogDetailsSelector.COURSE_DESCRIPTION);
+        return Array.from(lines)
+            .map(line => line.textContent || '')
+            .filter(Boolean);
+    }
+
+    scrapeSchedule(): CourseSchedule {
+        const days = this.row.querySelectorAll(TableDataSelector.SCHEDULE_DAYS);
+        const hours = this.row.querySelectorAll(TableDataSelector.SCHEDULE_HOURS);
+        const rooms = this.row.querySelectorAll(TableDataSelector.SCHEDULE_ROOM);
+
+        if (days.length !== hours.length) {
+            throw new Error('Schedule data is malformed');
+        }
+
+        // const schedule:  = [];
+        // for (let i = 0; i < days.length; i++) {
+        //     const day = days[i].textContent || '';
+        //     const hour = hours[i].textContent || '';
+        //     const room = rooms[i].textContent || '';
+
+        //     schedule.push({
+        //         day,
+        //         hour,
+        //         room,
+        //     });
+        // }
+        // return schedule;
+    }
+}

src/views/lib/courseCatalog/index.ts

@@ -1,2 +0,0 @@
-
-