commit 191fdc63d55bd449e8f4083bff981aeacdc9ba1a · dunkirk.sh/thistle

+108 -21

src/index.ts

···

       87
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       	type TranscriptionUpdate,

     

       88
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       	WhisperServiceManager,

     

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       } from "./lib/transcription";

     

       90
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       +
       import {

     

       91
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       +
       	validateClassId,

     

       92
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       +
       	validateCourseCode,

     

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       +
       	validateCourseName,

     

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       +
       	validateEmail,

     

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       +
       	validateName,

     

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       +
       	validatePasswordHash,

     

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       +
       	validateSemester,

     

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       +
       	validateYear,

     

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       +
       } from "./lib/validation";

     

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       import adminHTML from "./pages/admin.html";

     

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       import checkoutHTML from "./pages/checkout.html";

     

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       import classHTML from "./pages/class.html";

     
···

       318
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       							{ status: 400 },

     

       319
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       						);

     

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       					}

     

       321
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       -
       					// Password is client-side hashed (PBKDF2), should be 64 char hex

     

       322
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       -
       					if (password.length !== 64 || !/^[0-9a-f]+$/.test(password)) {

     

       331
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       +
       					// Validate password format (client-side hashed PBKDF2)

     

       332
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       +
       					const passwordValidation = validatePasswordHash(password);

     

       333
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       +
       					if (!passwordValidation.valid) {

     

       323
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       						return Response.json(

     

       324
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       -
       							{ error: "Invalid password format" },

     

       335
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       +
       							{ error: passwordValidation.error },

     

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       							{ status: 400 },

     

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       						);

     

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       					}

     
···

       414
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       					});

     

       415
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       					if (rateLimitError) return rateLimitError;

     

       416
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       417
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       -
       					// Password is client-side hashed (PBKDF2), should be 64 char hex

     

       418
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       -
       					if (password.length !== 64 || !/^[0-9a-f]+$/.test(password)) {

     

       428
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       +
       					// Validate password format (client-side hashed PBKDF2)

     

       429
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       +
       					const passwordValidation = validatePasswordHash(password);

     

       430
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       +
       					if (!passwordValidation.valid) {

     

       419
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       						return Response.json(

     

       420
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       -
       							{ error: "Invalid password format" },

     

       432
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       +
       							{ error: passwordValidation.error },

     

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       							{ status: 400 },

     

       422
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       						);

     

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       					}

     
···

       787
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       					}

     

       788
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       					// Validate password format (client-side hashed PBKDF2)

     

       790
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       -
       					if (password.length !== 64 || !/^[0-9a-f]+$/.test(password)) {

     

       802
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       +
       					const passwordValidation = validatePasswordHash(password);

     

       803
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       +
       					if (!passwordValidation.valid) {

     

       791
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       						return Response.json(

     

       792
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       -
       							{ error: "Invalid password format" },

     

       805
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       +
       							{ error: passwordValidation.error },

     

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       							{ status: 400 },

     

       794
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       						);

     

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       					}

     
···

       1229
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       				if (!password) {

     

       1230
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       					return Response.json({ error: "Password required" }, { status: 400 });

     

       1231
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       				}

     

       1232
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       -
       				// Password is client-side hashed (PBKDF2), should be 64 char hex

     

       1233
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       -
       				if (password.length !== 64 || !/^[0-9a-f]+$/.test(password)) {

     

       1245
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       +
       				// Validate password format (client-side hashed PBKDF2)

     

       1246
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       +
       				const passwordValidation = validatePasswordHash(password);

     

       1247
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       +
       				if (!passwordValidation.valid) {

     

       1234
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       					return Response.json(

     

       1235
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       -
       						{ error: "Invalid password format" },

     

       1249
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       +
       						{ error: passwordValidation.error },

     

       1236
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       						{ status: 400 },

     

       1237
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       					);

     

       1238
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       				}

     
···

       2433
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       					const body = await req.json();

     

       2434
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       					const { name } = body as { name: string };

     

       2435
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       2436
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       -
       					if (!name || name.trim().length === 0) {

     

       2450
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       +
       					const nameValidation = validateName(name);

     

       2451
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       +
       					if (!nameValidation.valid) {

     

       2437
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       						return Response.json(

     

       2438
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       -
       							{ error: "Name cannot be empty" },

     

       2453
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       +
       							{ error: nameValidation.error },

     

       2439
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       							{ status: 400 },

     

       2440
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       						);

     

       2441
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       					}

     
···

       2462
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       						skipVerification?: boolean;

     

       2463
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       					};

     

       2464
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       2465
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       -
       					if (!email || !email.includes("@")) {

     

       2480
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       +
       					const emailValidation = validateEmail(email);

     

       2481
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       +
       					if (!emailValidation.valid) {

     

       2466
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       						return Response.json(

     

       2467
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       -
       							{ error: "Invalid email address" },

     

       2483
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       +
       							{ error: emailValidation.error },

     

       2468
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       							{ status: 400 },

     

       2469
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       						);

     

       2470
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       					}

     
···

       2660
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       						meeting_times,

     

       2661
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       					} = body;

     

       2662
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       2663
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       -
       					if (!course_code || !name || !professor || !semester || !year) {

     

       2679
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       +
       					// Validate all required fields

     

       2680
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       +
       					const courseCodeValidation = validateCourseCode(course_code);

     

       2681
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       +
       					if (!courseCodeValidation.valid) {

     

       2682
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       +
       						return Response.json(

     

       2683
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       +
       							{ error: courseCodeValidation.error },

     

       2684
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       +
       							{ status: 400 },

     

       2685
       2685
       +
       						);

     

       2686
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       +
       					}

     

       2687
       2687
       +
       

     

       2688
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       +
       					const nameValidation = validateCourseName(name);

     

       2689
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       +
       					if (!nameValidation.valid) {

     

       2690
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       +
       						return Response.json(

     

       2691
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       +
       							{ error: nameValidation.error },

     

       2692
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       +
       							{ status: 400 },

     

       2693
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       +
       						);

     

       2694
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       +
       					}

     

       2695
       2695
       +
       

     

       2696
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       +
       					const professorValidation = validateName(professor, "Professor name");

     

       2697
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       +
       					if (!professorValidation.valid) {

     

       2664
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       						return Response.json(

     

       2665
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       -
       							{ error: "Missing required fields" },

     

       2699
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       +
       							{ error: professorValidation.error },

     

       2700
       2700
       +
       							{ status: 400 },

     

       2701
       2701
       +
       						);

     

       2702
       2702
       +
       					}

     

       2703
       2703
       +
       

     

       2704
       2704
       +
       					const semesterValidation = validateSemester(semester);

     

       2705
       2705
       +
       					if (!semesterValidation.valid) {

     

       2706
       2706
       +
       						return Response.json(

     

       2707
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       +
       							{ error: semesterValidation.error },

     

       2708
       2708
       +
       							{ status: 400 },

     

       2709
       2709
       +
       						);

     

       2710
       2710
       +
       					}

     

       2711
       2711
       +
       

     

       2712
       2712
       +
       					const yearValidation = validateYear(year);

     

       2713
       2713
       +
       					if (!yearValidation.valid) {

     

       2714
       2714
       +
       						return Response.json(

     

       2715
       2715
       +
       							{ error: yearValidation.error },

     

       2666
       2716
        
       							{ status: 400 },

     

       2667
       2717
        
       						);

     

       2668
       2718
        
       					}

     
···

       2722
       2772
        
       					const body = await req.json();

     

       2723
       2773
        
       					const classId = body.class_id;

     

       2724
       2774
        
       

     

       2725
       2725
       -
       					if (!classId || typeof classId !== "string") {

     

       2775
       2775
       +
       					const classIdValidation = validateClassId(classId);

     

       2776
       2776
       +
       					if (!classIdValidation.valid) {

     

       2726
       2777
        
       						return Response.json(

     

       2727
       2727
       -
       							{ error: "Class ID required" },

     

       2778
       2778
       +
       							{ error: classIdValidation.error },

     

       2728
       2779
        
       							{ status: 400 },

     

       2729
       2780
        
       						);

     

       2730
       2781
        
       					}

     
···

       2757
       2808
        
       						meetingTimes,

     

       2758
       2809
        
       					} = body;

     

       2759
       2810
        
       

     

       2760
       2760
       -
       					if (!courseCode || !courseName || !professor || !semester || !year) {

     

       2811
       2811
       +
       					// Validate all required fields

     

       2812
       2812
       +
       					const courseCodeValidation = validateCourseCode(courseCode);

     

       2813
       2813
       +
       					if (!courseCodeValidation.valid) {

     

       2761
       2814
        
       						return Response.json(

     

       2762
       2762
       -
       							{ error: "Missing required fields" },

     

       2815
       2815
       +
       							{ error: courseCodeValidation.error },

     

       2816
       2816
       +
       							{ status: 400 },

     

       2817
       2817
       +
       						);

     

       2818
       2818
       +
       					}

     

       2819
       2819
       +
       

     

       2820
       2820
       +
       					const nameValidation = validateCourseName(courseName);

     

       2821
       2821
       +
       					if (!nameValidation.valid) {

     

       2822
       2822
       +
       						return Response.json(

     

       2823
       2823
       +
       							{ error: nameValidation.error },

     

       2824
       2824
       +
       							{ status: 400 },

     

       2825
       2825
       +
       						);

     

       2826
       2826
       +
       					}

     

       2827
       2827
       +
       

     

       2828
       2828
       +
       					const professorValidation = validateName(professor, "Professor name");

     

       2829
       2829
       +
       					if (!professorValidation.valid) {

     

       2830
       2830
       +
       						return Response.json(

     

       2831
       2831
       +
       							{ error: professorValidation.error },

     

       2832
       2832
       +
       							{ status: 400 },

     

       2833
       2833
       +
       						);

     

       2834
       2834
       +
       					}

     

       2835
       2835
       +
       

     

       2836
       2836
       +
       					const semesterValidation = validateSemester(semester);

     

       2837
       2837
       +
       					if (!semesterValidation.valid) {

     

       2838
       2838
       +
       						return Response.json(

     

       2839
       2839
       +
       							{ error: semesterValidation.error },

     

       2840
       2840
       +
       							{ status: 400 },

     

       2841
       2841
       +
       						);

     

       2842
       2842
       +
       					}

     

       2843
       2843
       +
       

     

       2844
       2844
       +
       					const yearValidation = validateYear(

     

       2845
       2845
       +
       						typeof year === "string" ? Number.parseInt(year, 10) : year,

     

       2846
       2846
       +
       					);

     

       2847
       2847
       +
       					if (!yearValidation.valid) {

     

       2848
       2848
       +
       						return Response.json(

     

       2849
       2849
       +
       							{ error: yearValidation.error },

     

       2763
       2850
        
       							{ status: 400 },

     

       2764
       2851
        
       						);

     

       2765
       2852
        
       					}

+118

src/lib/validation.test.ts

···

       1
       1
       +
       import { expect, test } from "bun:test";

     

       2
       2
       +
       import {

     

       3
       3
       +
       	validateClassId,

     

       4
       4
       +
       	validateCourseCode,

     

       5
       5
       +
       	validateCourseName,

     

       6
       6
       +
       	validateEmail,

     

       7
       7
       +
       	validateName,

     

       8
       8
       +
       	validatePasswordHash,

     

       9
       9
       +
       	validateSemester,

     

       10
       10
       +
       	validateYear,

     

       11
       11
       +
       } from "./validation";

     

       12
       12
       +
       

     

       13
       13
       +
       test("validateEmail accepts valid emails", () => {

     

       14
       14
       +
       	expect(validateEmail("test@example.com").valid).toBe(true);

     

       15
       15
       +
       	expect(validateEmail("user.name+tag@example.co.uk").valid).toBe(true);

     

       16
       16
       +
       	expect(validateEmail("test@subdomain.example.com").valid).toBe(true);

     

       17
       17
       +
       });

     

       18
       18
       +
       

     

       19
       19
       +
       test("validateEmail rejects invalid emails", () => {

     

       20
       20
       +
       	expect(validateEmail("").valid).toBe(false);

     

       21
       21
       +
       	expect(validateEmail("not-an-email").valid).toBe(false);

     

       22
       22
       +
       	expect(validateEmail("@example.com").valid).toBe(false);

     

       23
       23
       +
       	expect(validateEmail("test@").valid).toBe(false);

     

       24
       24
       +
       	expect(validateEmail("a".repeat(321)).valid).toBe(false); // Too long

     

       25
       25
       +
       	expect(validateEmail(123).valid).toBe(false); // Not a string

     

       26
       26
       +
       });

     

       27
       27
       +
       

     

       28
       28
       +
       test("validateName accepts valid names", () => {

     

       29
       29
       +
       	expect(validateName("John Doe").valid).toBe(true);

     

       30
       30
       +
       	expect(validateName("Alice").valid).toBe(true);

     

       31
       31
       +
       	expect(validateName("María García").valid).toBe(true);

     

       32
       32
       +
       });

     

       33
       33
       +
       

     

       34
       34
       +
       test("validateName rejects invalid names", () => {

     

       35
       35
       +
       	expect(validateName("").valid).toBe(false);

     

       36
       36
       +
       	expect(validateName("   ").valid).toBe(false); // Whitespace only

     

       37
       37
       +
       	expect(validateName("a".repeat(256)).valid).toBe(false); // Too long

     

       38
       38
       +
       	expect(validateName(123).valid).toBe(false); // Not a string

     

       39
       39
       +
       });

     

       40
       40
       +
       

     

       41
       41
       +
       test("validatePasswordHash accepts valid PBKDF2 hashes", () => {

     

       42
       42
       +
       	const validHash = "a".repeat(64); // 64 char hex string

     

       43
       43
       +
       	expect(validatePasswordHash(validHash).valid).toBe(true);

     

       44
       44
       +
       	expect(validatePasswordHash("0123456789abcdef".repeat(4)).valid).toBe(true);

     

       45
       45
       +
       });

     

       46
       46
       +
       

     

       47
       47
       +
       test("validatePasswordHash rejects invalid hashes", () => {

     

       48
       48
       +
       	expect(validatePasswordHash("short").valid).toBe(false);

     

       49
       49
       +
       	expect(validatePasswordHash("a".repeat(63)).valid).toBe(false); // Too short

     

       50
       50
       +
       	expect(validatePasswordHash("a".repeat(65)).valid).toBe(false); // Too long

     

       51
       51
       +
       	expect(validatePasswordHash("g".repeat(64)).valid).toBe(false); // Invalid hex

     

       52
       52
       +
       	expect(validatePasswordHash(123).valid).toBe(false); // Not a string

     

       53
       53
       +
       });

     

       54
       54
       +
       

     

       55
       55
       +
       test("validateCourseCode accepts valid course codes", () => {

     

       56
       56
       +
       	expect(validateCourseCode("CS101").valid).toBe(true);

     

       57
       57
       +
       	expect(validateCourseCode("MATH 2410").valid).toBe(true);

     

       58
       58
       +
       	expect(validateCourseCode("BIO-101").valid).toBe(true);

     

       59
       59
       +
       });

     

       60
       60
       +
       

     

       61
       61
       +
       test("validateCourseCode rejects invalid course codes", () => {

     

       62
       62
       +
       	expect(validateCourseCode("").valid).toBe(false);

     

       63
       63
       +
       	expect(validateCourseCode("   ").valid).toBe(false);

     

       64
       64
       +
       	expect(validateCourseCode("a".repeat(51)).valid).toBe(false); // Too long

     

       65
       65
       +
       	expect(validateCourseCode(123).valid).toBe(false); // Not a string

     

       66
       66
       +
       });

     

       67
       67
       +
       

     

       68
       68
       +
       test("validateCourseName accepts valid course names", () => {

     

       69
       69
       +
       	expect(validateCourseName("Introduction to Computer Science").valid).toBe(

     

       70
       70
       +
       		true,

     

       71
       71
       +
       	);

     

       72
       72
       +
       	expect(validateCourseName("Calculus I").valid).toBe(true);

     

       73
       73
       +
       });

     

       74
       74
       +
       

     

       75
       75
       +
       test("validateCourseName rejects invalid course names", () => {

     

       76
       76
       +
       	expect(validateCourseName("").valid).toBe(false);

     

       77
       77
       +
       	expect(validateCourseName("   ").valid).toBe(false);

     

       78
       78
       +
       	expect(validateCourseName("a".repeat(501)).valid).toBe(false); // Too long

     

       79
       79
       +
       	expect(validateCourseName(123).valid).toBe(false); // Not a string

     

       80
       80
       +
       });

     

       81
       81
       +
       

     

       82
       82
       +
       test("validateSemester accepts valid semesters", () => {

     

       83
       83
       +
       	expect(validateSemester("Fall").valid).toBe(true);

     

       84
       84
       +
       	expect(validateSemester("spring").valid).toBe(true); // Case insensitive

     

       85
       85
       +
       	expect(validateSemester("SUMMER").valid).toBe(true);

     

       86
       86
       +
       	expect(validateSemester("Winter").valid).toBe(true);

     

       87
       87
       +
       });

     

       88
       88
       +
       

     

       89
       89
       +
       test("validateSemester rejects invalid semesters", () => {

     

       90
       90
       +
       	expect(validateSemester("").valid).toBe(false);

     

       91
       91
       +
       	expect(validateSemester("Invalid").valid).toBe(false);

     

       92
       92
       +
       	expect(validateSemester("Autumn").valid).toBe(false);

     

       93
       93
       +
       	expect(validateSemester(123).valid).toBe(false); // Not a string

     

       94
       94
       +
       });

     

       95
       95
       +
       

     

       96
       96
       +
       test("validateYear accepts valid years", () => {

     

       97
       97
       +
       	const currentYear = new Date().getFullYear();

     

       98
       98
       +
       	expect(validateYear(currentYear).valid).toBe(true);

     

       99
       99
       +
       	expect(validateYear(2024).valid).toBe(true);

     

       100
       100
       +
       	expect(validateYear(currentYear + 1).valid).toBe(true);

     

       101
       101
       +
       });

     

       102
       102
       +
       

     

       103
       103
       +
       test("validateYear rejects invalid years", () => {

     

       104
       104
       +
       	expect(validateYear(1999).valid).toBe(false); // Too old

     

       105
       105
       +
       	expect(validateYear(2050).valid).toBe(false); // Too far in future

     

       106
       106
       +
       	expect(validateYear("2024").valid).toBe(false); // Not a number

     

       107
       107
       +
       });

     

       108
       108
       +
       

     

       109
       109
       +
       test("validateClassId accepts valid class IDs", () => {

     

       110
       110
       +
       	expect(validateClassId("abc123").valid).toBe(true);

     

       111
       111
       +
       	expect(validateClassId("class-2024-fall").valid).toBe(true);

     

       112
       112
       +
       });

     

       113
       113
       +
       

     

       114
       114
       +
       test("validateClassId rejects invalid class IDs", () => {

     

       115
       115
       +
       	expect(validateClassId("").valid).toBe(false);

     

       116
       116
       +
       	expect(validateClassId("a".repeat(101)).valid).toBe(false); // Too long

     

       117
       117
       +
       	expect(validateClassId(123).valid).toBe(false); // Not a string

     

       118
       118
       +
       });

+223

src/lib/validation.ts

···

       1
       1
       +
       /**

     

       2
       2
       +
        * Input validation utilities

     

       3
       3
       +
        */

     

       4
       4
       +
       

     

       5
       5
       +
       // RFC 5322 compliant email regex (simplified but comprehensive)

     

       6
       6
       +
       const EMAIL_REGEX =

     

       7
       7
       +
       	/^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/;

     

       8
       8
       +
       

     

       9
       9
       +
       // Validation limits

     

       10
       10
       +
       export const VALIDATION_LIMITS = {

     

       11
       11
       +
       	EMAIL_MAX: 320, // RFC 5321

     

       12
       12
       +
       	NAME_MAX: 255,

     

       13
       13
       +
       	PASSWORD_HASH_LENGTH: 64, // PBKDF2 hex output

     

       14
       14
       +
       	COURSE_CODE_MAX: 50,

     

       15
       15
       +
       	COURSE_NAME_MAX: 500,

     

       16
       16
       +
       	PROFESSOR_NAME_MAX: 255,

     

       17
       17
       +
       	SEMESTER_MAX: 50,

     

       18
       18
       +
       	CLASS_ID_MAX: 100,

     

       19
       19
       +
       };

     

       20
       20
       +
       

     

       21
       21
       +
       export interface ValidationResult {

     

       22
       22
       +
       	valid: boolean;

     

       23
       23
       +
       	error?: string;

     

       24
       24
       +
       }

     

       25
       25
       +
       

     

       26
       26
       +
       /**

     

       27
       27
       +
        * Validate email address

     

       28
       28
       +
        */

     

       29
       29
       +
       export function validateEmail(email: unknown): ValidationResult {

     

       30
       30
       +
       	if (typeof email !== "string") {

     

       31
       31
       +
       		return { valid: false, error: "Email must be a string" };

     

       32
       32
       +
       	}

     

       33
       33
       +
       

     

       34
       34
       +
       	const trimmed = email.trim();

     

       35
       35
       +
       

     

       36
       36
       +
       	if (trimmed.length === 0) {

     

       37
       37
       +
       		return { valid: false, error: "Email is required" };

     

       38
       38
       +
       	}

     

       39
       39
       +
       

     

       40
       40
       +
       	if (trimmed.length > VALIDATION_LIMITS.EMAIL_MAX) {

     

       41
       41
       +
       		return {

     

       42
       42
       +
       			valid: false,

     

       43
       43
       +
       			error: `Email must be less than ${VALIDATION_LIMITS.EMAIL_MAX} characters`,

     

       44
       44
       +
       		};

     

       45
       45
       +
       	}

     

       46
       46
       +
       

     

       47
       47
       +
       	if (!EMAIL_REGEX.test(trimmed)) {

     

       48
       48
       +
       		return { valid: false, error: "Invalid email format" };

     

       49
       49
       +
       	}

     

       50
       50
       +
       

     

       51
       51
       +
       	return { valid: true };

     

       52
       52
       +
       }

     

       53
       53
       +
       

     

       54
       54
       +
       /**

     

       55
       55
       +
        * Validate name (user name, professor name, etc.)

     

       56
       56
       +
        */

     

       57
       57
       +
       export function validateName(

     

       58
       58
       +
       	name: unknown,

     

       59
       59
       +
       	fieldName = "Name",

     

       60
       60
       +
       ): ValidationResult {

     

       61
       61
       +
       	if (typeof name !== "string") {

     

       62
       62
       +
       		return { valid: false, error: `${fieldName} must be a string` };

     

       63
       63
       +
       	}

     

       64
       64
       +
       

     

       65
       65
       +
       	const trimmed = name.trim();

     

       66
       66
       +
       

     

       67
       67
       +
       	if (trimmed.length === 0) {

     

       68
       68
       +
       		return { valid: false, error: `${fieldName} is required` };

     

       69
       69
       +
       	}

     

       70
       70
       +
       

     

       71
       71
       +
       	if (trimmed.length > VALIDATION_LIMITS.NAME_MAX) {

     

       72
       72
       +
       		return {

     

       73
       73
       +
       			valid: false,

     

       74
       74
       +
       			error: `${fieldName} must be less than ${VALIDATION_LIMITS.NAME_MAX} characters`,

     

       75
       75
       +
       		};

     

       76
       76
       +
       	}

     

       77
       77
       +
       

     

       78
       78
       +
       	return { valid: true };

     

       79
       79
       +
       }

     

       80
       80
       +
       

     

       81
       81
       +
       /**

     

       82
       82
       +
        * Validate password hash format (client-side PBKDF2)

     

       83
       83
       +
        */

     

       84
       84
       +
       export function validatePasswordHash(password: unknown): ValidationResult {

     

       85
       85
       +
       	if (typeof password !== "string") {

     

       86
       86
       +
       		return { valid: false, error: "Password must be a string" };

     

       87
       87
       +
       	}

     

       88
       88
       +
       

     

       89
       89
       +
       	// Client sends PBKDF2 as hex string

     

       90
       90
       +
       	if (

     

       91
       91
       +
       		password.length !== VALIDATION_LIMITS.PASSWORD_HASH_LENGTH ||

     

       92
       92
       +
       		!/^[0-9a-f]+$/.test(password)

     

       93
       93
       +
       	) {

     

       94
       94
       +
       		return { valid: false, error: "Invalid password format" };

     

       95
       95
       +
       	}

     

       96
       96
       +
       

     

       97
       97
       +
       	return { valid: true };

     

       98
       98
       +
       }

     

       99
       99
       +
       

     

       100
       100
       +
       /**

     

       101
       101
       +
        * Validate course code

     

       102
       102
       +
        */

     

       103
       103
       +
       export function validateCourseCode(courseCode: unknown): ValidationResult {

     

       104
       104
       +
       	if (typeof courseCode !== "string") {

     

       105
       105
       +
       		return { valid: false, error: "Course code must be a string" };

     

       106
       106
       +
       	}

     

       107
       107
       +
       

     

       108
       108
       +
       	const trimmed = courseCode.trim();

     

       109
       109
       +
       

     

       110
       110
       +
       	if (trimmed.length === 0) {

     

       111
       111
       +
       		return { valid: false, error: "Course code is required" };

     

       112
       112
       +
       	}

     

       113
       113
       +
       

     

       114
       114
       +
       	if (trimmed.length > VALIDATION_LIMITS.COURSE_CODE_MAX) {

     

       115
       115
       +
       		return {

     

       116
       116
       +
       			valid: false,

     

       117
       117
       +
       			error: `Course code must be less than ${VALIDATION_LIMITS.COURSE_CODE_MAX} characters`,

     

       118
       118
       +
       		};

     

       119
       119
       +
       	}

     

       120
       120
       +
       

     

       121
       121
       +
       	return { valid: true };

     

       122
       122
       +
       }

     

       123
       123
       +
       

     

       124
       124
       +
       /**

     

       125
       125
       +
        * Validate course/class name

     

       126
       126
       +
        */

     

       127
       127
       +
       export function validateCourseName(courseName: unknown): ValidationResult {

     

       128
       128
       +
       	if (typeof courseName !== "string") {

     

       129
       129
       +
       		return { valid: false, error: "Course name must be a string" };

     

       130
       130
       +
       	}

     

       131
       131
       +
       

     

       132
       132
       +
       	const trimmed = courseName.trim();

     

       133
       133
       +
       

     

       134
       134
       +
       	if (trimmed.length === 0) {

     

       135
       135
       +
       		return { valid: false, error: "Course name is required" };

     

       136
       136
       +
       	}

     

       137
       137
       +
       

     

       138
       138
       +
       	if (trimmed.length > VALIDATION_LIMITS.COURSE_NAME_MAX) {

     

       139
       139
       +
       		return {

     

       140
       140
       +
       			valid: false,

     

       141
       141
       +
       			error: `Course name must be less than ${VALIDATION_LIMITS.COURSE_NAME_MAX} characters`,

     

       142
       142
       +
       		};

     

       143
       143
       +
       	}

     

       144
       144
       +
       

     

       145
       145
       +
       	return { valid: true };

     

       146
       146
       +
       }

     

       147
       147
       +
       

     

       148
       148
       +
       /**

     

       149
       149
       +
        * Validate semester

     

       150
       150
       +
        */

     

       151
       151
       +
       export function validateSemester(semester: unknown): ValidationResult {

     

       152
       152
       +
       	if (typeof semester !== "string") {

     

       153
       153
       +
       		return { valid: false, error: "Semester must be a string" };

     

       154
       154
       +
       	}

     

       155
       155
       +
       

     

       156
       156
       +
       	const trimmed = semester.trim();

     

       157
       157
       +
       

     

       158
       158
       +
       	if (trimmed.length === 0) {

     

       159
       159
       +
       		return { valid: false, error: "Semester is required" };

     

       160
       160
       +
       	}

     

       161
       161
       +
       

     

       162
       162
       +
       	if (trimmed.length > VALIDATION_LIMITS.SEMESTER_MAX) {

     

       163
       163
       +
       		return {

     

       164
       164
       +
       			valid: false,

     

       165
       165
       +
       			error: `Semester must be less than ${VALIDATION_LIMITS.SEMESTER_MAX} characters`,

     

       166
       166
       +
       		};

     

       167
       167
       +
       	}

     

       168
       168
       +
       

     

       169
       169
       +
       	// Optional: validate it's a known semester value

     

       170
       170
       +
       	const validSemesters = ["fall", "spring", "summer", "winter"];

     

       171
       171
       +
       	if (!validSemesters.includes(trimmed.toLowerCase())) {

     

       172
       172
       +
       		return {

     

       173
       173
       +
       			valid: false,

     

       174
       174
       +
       			error: "Semester must be Fall, Spring, Summer, or Winter",

     

       175
       175
       +
       		};

     

       176
       176
       +
       	}

     

       177
       177
       +
       

     

       178
       178
       +
       	return { valid: true };

     

       179
       179
       +
       }

     

       180
       180
       +
       

     

       181
       181
       +
       /**

     

       182
       182
       +
        * Validate year

     

       183
       183
       +
        */

     

       184
       184
       +
       export function validateYear(year: unknown): ValidationResult {

     

       185
       185
       +
       	if (typeof year !== "number") {

     

       186
       186
       +
       		return { valid: false, error: "Year must be a number" };

     

       187
       187
       +
       	}

     

       188
       188
       +
       

     

       189
       189
       +
       	const currentYear = new Date().getFullYear();

     

       190
       190
       +
       	const minYear = 2000;

     

       191
       191
       +
       	const maxYear = currentYear + 5;

     

       192
       192
       +
       

     

       193
       193
       +
       	if (year < minYear || year > maxYear) {

     

       194
       194
       +
       		return {

     

       195
       195
       +
       			valid: false,

     

       196
       196
       +
       			error: `Year must be between ${minYear} and ${maxYear}`,

     

       197
       197
       +
       		};

     

       198
       198
       +
       	}

     

       199
       199
       +
       

     

       200
       200
       +
       	return { valid: true };

     

       201
       201
       +
       }

     

       202
       202
       +
       

     

       203
       203
       +
       /**

     

       204
       204
       +
        * Validate class ID format

     

       205
       205
       +
        */

     

       206
       206
       +
       export function validateClassId(classId: unknown): ValidationResult {

     

       207
       207
       +
       	if (typeof classId !== "string") {

     

       208
       208
       +
       		return { valid: false, error: "Class ID must be a string" };

     

       209
       209
       +
       	}

     

       210
       210
       +
       

     

       211
       211
       +
       	if (classId.length === 0) {

     

       212
       212
       +
       		return { valid: false, error: "Class ID is required" };

     

       213
       213
       +
       	}

     

       214
       214
       +
       

     

       215
       215
       +
       	if (classId.length > VALIDATION_LIMITS.CLASS_ID_MAX) {

     

       216
       216
       +
       		return {

     

       217
       217
       +
       			valid: false,

     

       218
       218
       +
       			error: `Class ID must be less than ${VALIDATION_LIMITS.CLASS_ID_MAX} characters`,

     

       219
       219
       +
       		};

     

       220
       220
       +
       	}

     

       221
       221
       +
       

     

       222
       222
       +
       	return { valid: true };

     

       223
       223
       +
       }