course conflict highlighting and calculations

src/shared/types/Course.ts

@@ -1,6 +1,6 @@
 /* eslint-disable max-classes-per-file */
 import { Serialized } from 'chrome-extension-toolkit';
-import { capitalize } from '../util/string';
+import { CourseMeeting } from './CourseMeeting';
 import { CourseSchedule } from './CourseSchedule';
 import Instructor from './Instructor';
 
@@ -74,6 +74,24 @@ export class Course {
         this.schedule = new CourseSchedule(course.schedule);
         this.instructors = course.instructors.map(i => new Instructor(i));
     }
+
+    /**
+     * Gets a list of all the conflicts between this course and another course (i.e. if they have a meeting at the same time)
+     * @param other another course to compare this course to
+     * @returns a list of all the conflicts between this course and the other course as a tuple of the two conflicting meetings
+     */
+    getConflicts(other: Course): [CourseMeeting, CourseMeeting][] {
+        const conflicts: [CourseMeeting, CourseMeeting][] = [];
+        for (const meeting of this.schedule.meetings) {
+            for (const otherMeeting of other.schedule.meetings) {
+                if (meeting.isConflicting(otherMeeting)) {
+                    conflicts.push([meeting, otherMeeting]);
+                }
+            }
+        }
+
+        return conflicts;
+    }
 }
 
 /**

src/shared/types/CourseMeeting.ts

@@ -41,6 +41,22 @@ export class CourseMeeting {
         Object.assign(this, meeting);
     }
 
+    /**
+     * Whether or not this meeting conflicts with another meeting
+     * MWF 10:00 am - 11:00 am conflicts with a F 10:00 am - 10:30 am
+     * @param meeting the meeting to check for conflicts with
+     * @returns true if the given meeting conflicts with this meeting, false otherwise
+     */
+    isConflicting(meeting: CourseMeeting): boolean {
+        const { days, startTime, endTime } = this;
+        const { days: otherDays, startTime: otherStartTime, endTime: otherEndTime } = meeting;
+
+        const hasDayConflict = days.some(day => otherDays.includes(day));
+        const hasTimeConflict = startTime < otherEndTime && endTime > otherStartTime;
+
+        return hasDayConflict && hasTimeConflict;
+    }
+
     /**
      * Return the string representation of the days of the week that this meeting is taught
      * @param options options for the string representation