Add planner import and export

website/package.json

@@ -171,7 +171,8 @@
     "reselect": "4.1.8",
     "samlify": "2.7.7",
     "searchkit": "2.4.1-alpha.5",
-    "use-subscription": "1.10.0"
+    "use-subscription": "1.10.0",
+    "zod": "^3.25.67"
   },
   "browserslist": [
     "extends browserslist-config-nusmods"

website/src/actions/export.ts

@@ -9,7 +9,9 @@
 import retryImport from 'utils/retryImport';
 import { getSemesterTimetableLessons } from 'selectors/timetables';
 import { TaModulesConfig } from 'types/timetables';
+import { PlannerStateSchema } from 'types/schemas/planner';
 import { SET_EXPORTED_DATA } from './constants';
+import { openNotification } from './app';
 
 function downloadUrl(blob: Blob, filename: string) {
   const link = document.createElement('a');
@@ -79,3 +81,21 @@
     },
   };
 }
+
+export function downloadPlanner() {
+  return (_dispatch: Dispatch, getState: GetState) => {
+    const { planner } = getState();
+
+    // removes _persist
+    const parsed = PlannerStateSchema.safeParse(planner);
+    if (!parsed.success) {
+      _dispatch(openNotification('Planner data is corrupted.'));
+      return;
+    }
+
+    const exportState = parsed.data;
+    const bytes = new TextEncoder().encode(JSON.stringify(exportState));
+    const blob = new Blob([bytes], { type: 'application/json' });
+    downloadUrl(blob, 'nusmods_planner.json');
+  };
+}

website/src/actions/planner.ts

@@ -1,6 +1,6 @@
 import { ModuleCode, Semester } from 'types/modules';
 import { AddModuleData } from 'types/planner';
-import { CustomModule } from 'types/reducers';
+import { CustomModule, PlannerState } from 'types/reducers';
 import { PLAN_TO_TAKE_SEMESTER, PLAN_TO_TAKE_YEAR } from 'utils/planner';
 
 export const SET_PLANNER_MIN_YEAR = 'SET_PLANNER_MIN_YEAR' as const;
@@ -95,3 +95,19 @@ export function addCustomModule(moduleCode: ModuleCode, data: CustomModule) {
     payload: { moduleCode, data },
   };
 }
+
+export const IMPORT_PLANNER = 'IMPORT_PLANNER' as const;
+export function importPlanner(importedState: PlannerState) {
+  return {
+    type: IMPORT_PLANNER,
+    payload: { importedState },
+  };
+}
+
+export const CLEAR_PLANNER = 'CLEAR_PLANNER' as const;
+export function clearPlanner() {
+  return {
+    type: CLEAR_PLANNER,
+    payload: {},
+  };
+}

website/src/reducers/planner.test.ts

@@ -13,17 +13,18 @@ import {
   setPlannerMaxYear,
   setPlannerIBLOCs,
   setIgnorePrerequisitesCheck,
+  IMPORT_PLANNER,
+  importPlanner,
+  CLEAR_PLANNER,
+  clearPlanner,
 } from 'actions/planner';
 import { PlannerState } from 'types/reducers';
-import reducer, { migrateV0toV1, nextId } from './planner';
+import reducer, { defaultPlannerState, migrateV0toV1, nextId } from './planner';
 
 const defaultState: PlannerState = {
+  ...defaultPlannerState,
   minYear: '2017/2018',
   maxYear: '2018/2019',
-  iblocs: false,
-  ignorePrereqCheck: false,
-  modules: {},
-  custom: {},
 };
 
 describe(nextId, () => {
@@ -203,6 +204,42 @@ describe(REMOVE_PLANNER_MODULE, () => {
   });
 });
 
+describe(IMPORT_PLANNER, () => {
+  const initial: PlannerState = {
+    ...defaultState,
+  };
+
+  const importedState: PlannerState = {
+    minYear: '2024/2025',
+    maxYear: '2025/2026',
+    iblocs: true,
+    ignorePrereqCheck: true,
+    modules: {
+      0: { id: '0', moduleCode: 'CS1010S', year: '2018/2019', semester: 1, index: 0 },
+    },
+    custom: {
+      CS1010A: { title: 'CS1010B', moduleCredit: 4 },
+    },
+  };
+  test('should import the given planner', () => {
+    expect(reducer(initial, importPlanner(importedState))).toEqual(importedState);
+  });
+});
+
+describe(CLEAR_PLANNER, () => {
+  const initial: PlannerState = {
+    ...defaultState,
+
+    modules: {
+      0: { id: '0', moduleCode: 'CS1010S', year: '2018/2019', semester: 1, index: 0 },
+    },
+  };
+
+  test('should clear the planner', () => {
+    expect(reducer(initial, clearPlanner())).toEqual(defaultPlannerState);
+  });
+});
+
 describe(migrateV0toV1, () => {
   test('should migrate old modules state to new modules state', () => {
     expect(

website/src/reducers/planner.ts

@@ -16,11 +16,13 @@ import {
   SET_PLANNER_MAX_YEAR,
   SET_PLANNER_MIN_YEAR,
   SET_IGNORE_PREREQUISITES_CHECK,
+  IMPORT_PLANNER,
+  CLEAR_PLANNER,
 } from 'actions/planner';
 import { filterModuleForSemester } from 'selectors/planner';
 import config from 'config';
 
-const defaultPlannerState: PlannerState = {
+export const defaultPlannerState: PlannerState = {
   minYear: config.academicYear,
   maxYear: config.academicYear,
   iblocs: false,
@@ -149,6 +151,16 @@ export default function planner(
         draft.modules[action.payload.id].moduleCode = action.payload.moduleCode;
       });
 
+    case IMPORT_PLANNER:
+      return {
+        ...action.payload.importedState,
+      };
+
+    case CLEAR_PLANNER:
+      return {
+        ...defaultPlannerState,
+      };
+
     default:
       return state;
   }

website/src/types/schemas/planner.test.ts

@@ -0,0 +1,174 @@
+import {
+  PlannerTimeSchema,
+  CustomModuleSchema,
+  CustomModuleDataSchema,
+  PlannerStateSchema,
+} from './planner';
+
+describe('PlannerTimeSchema', () => {
+  it('passes with moduleCode only', () => {
+    const data = {
+      id: '1',
+      year: '2024',
+      semester: 1,
+      index: 0,
+      moduleCode: 'CS1010',
+    };
+    expect(() => PlannerTimeSchema.parse(data)).not.toThrow();
+  });
+
+  it('passes with placeholderId only', () => {
+    const data = {
+      id: '2',
+      year: '2024',
+      semester: 2,
+      index: 1,
+      placeholderId: 'geq',
+    };
+    expect(() => PlannerTimeSchema.parse(data)).not.toThrow();
+  });
+
+  it('fails without moduleCode and placeholderId', () => {
+    const data = {
+      id: '3',
+      year: '2024',
+      semester: 1,
+      index: 0,
+    };
+    expect(() => PlannerTimeSchema.parse(data)).toThrow();
+  });
+});
+
+describe('CustomModuleSchema', () => {
+  it('passes with valid data', () => {
+    expect(() =>
+      CustomModuleSchema.parse({
+        title: 'Prompt Engineering',
+        moduleCredit: 4,
+      }),
+    ).not.toThrow();
+  });
+
+  it('passes with null title', () => {
+    expect(() =>
+      CustomModuleSchema.parse({
+        title: null,
+        moduleCredit: 4,
+      }),
+    ).not.toThrow();
+  });
+
+  it('fails if moduleCredit is missing', () => {
+    expect(() =>
+      CustomModuleSchema.parse({
+        title: 'No Credit',
+      }),
+    ).toThrow();
+  });
+});
+
+describe('CustomModuleDataSchema', () => {
+  it('parses a record of custom modules', () => {
+    const data = {
+      CS1010A: {
+        title: 'CS1010B',
+        moduleCredit: 4,
+      },
+      CS1010S: {
+        title: null,
+        moduleCredit: 2,
+      },
+    };
+    expect(() => CustomModuleDataSchema.parse(data)).not.toThrow();
+  });
+
+  it('fails if any module is invalid', () => {
+    const data = {
+      invalidMod: {
+        title: 'CS1010C',
+        moduleCredit: null,
+      },
+    };
+    expect(() => CustomModuleDataSchema.parse(data)).toThrow();
+  });
+});
+
+describe('PlannerStateSchema', () => {
+  it('parses valid planner state', () => {
+    const data = {
+      minYear: '2024',
+      maxYear: '2028',
+      iblocs: true,
+      modules: {
+        '0': {
+          id: '1',
+          year: '2024',
+          semester: 1,
+          index: 0,
+          moduleCode: 'CS1231S',
+        },
+        '1': {
+          id: '1',
+          year: '2024',
+          semester: 1,
+          index: 1,
+          moduleCode: 'CS2030S',
+        },
+      },
+      custom: {
+        CS1010A: {
+          title: 'CS1010B',
+          moduleCredit: 4,
+        },
+      },
+    };
+    expect(() => PlannerStateSchema.parse(data)).not.toThrow();
+  });
+
+  it('fails if a module inside modules is invalid', () => {
+    const data = {
+      minYear: '2024',
+      maxYear: '2028',
+      iblocs: false,
+      modules: {
+        'mod-bad': {
+          id: 'bad',
+          year: '2025',
+          semester: 1,
+          index: 0,
+        },
+      },
+      custom: {},
+    };
+    expect(() => PlannerStateSchema.parse(data)).toThrow();
+  });
+
+  it('removes _persist', () => {
+    const data = {
+      minYear: '2024',
+      maxYear: '2028',
+      iblocs: true,
+      modules: {
+        '0': {
+          id: '1',
+          year: '2024',
+          semester: 1,
+          index: 0,
+          moduleCode: 'CS1231S',
+        },
+      },
+      custom: {},
+    };
+    const dataWithPersistConfig = {
+      ...data,
+      _persist: {
+        version: 1,
+        rehydrated: true,
+      },
+    };
+
+    const parsed = PlannerStateSchema.safeParse(dataWithPersistConfig);
+    expect(parsed.success).toBe(true);
+    expect(parsed.data).toEqual(data);
+  });
+});

website/src/types/schemas/planner.ts

@@ -0,0 +1,33 @@
+import { z } from 'zod';
+
+export const PlannerTimeSchema = z
+  .object({
+    id: z.string(),
+    year: z.string(),
+    semester: z.number(),
+    index: z.number(),
+    moduleCode: z.string().optional(),
+    placeholderId: z.string().optional(),
+  })
+  .refine((data) => data.placeholderId || data.moduleCode, {
+    message: 'moduleCode is required if placeholderId is not provided',
+    path: ['moduleCode'],
+  });
+
+export const CustomModuleSchema = z.object({
+  title: z.string().nullable().optional(),
+  moduleCredit: z.number(),
+});
+
+export const CustomModuleDataSchema = z.record(CustomModuleSchema);
+
+export const PlannerStateSchema = z
+  .object({
+    minYear: z.string(),
+    maxYear: z.string(),
+    iblocs: z.boolean(),
+    ignorePrereqCheck: z.boolean().optional(),
+    modules: z.record(PlannerTimeSchema),
+    custom: CustomModuleDataSchema,
+  })
+  .strip();