Convert to TypeScript (#713)

* setup typescript

* covert to TypeScript

.ember-cli

@@ -11,5 +11,5 @@
     Setting `isTypeScriptProject` to true will force the blueprint generators to generate TypeScript
     rather than JavaScript by default, when a TypeScript version of a given blueprint is available.
   */
-  "isTypeScriptProject": false
+  "isTypeScriptProject": true
 }

.eslintrc.js

@@ -2,18 +2,11 @@
 
 module.exports = {
   root: true,
-  parser: '@babel/eslint-parser',
+  parser: '@typescript-eslint/parser',
   parserOptions: {
     ecmaVersion: 'latest',
-    sourceType: 'module',
-    requireConfigFile: false,
-    babelOptions: {
-      plugins: [
-        ['@babel/plugin-proposal-decorators', { decoratorsBeforeExport: true }],
-      ],
   },
-  },
-  plugins: ['ember'],
+  plugins: ['ember', '@typescript-eslint'],
   extends: [
     'eslint:recommended',
     'plugin:ember/recommended',
@@ -32,6 +25,15 @@ module.exports = {
     'no-prototype-builtins': 'warn',
   },
   overrides: [
+    // ts files
+    {
+      files: ['**/*.ts'],
+      extends: [
+        'plugin:@typescript-eslint/eslint-recommended',
+        'plugin:@typescript-eslint/recommended',
+      ],
+      rules: {},
+    },
     // node files
     {
       files: [
@@ -46,9 +48,6 @@ module.exports = {
         './lib/*/index.js',
         './server/**/*.js',
       ],
-      parserOptions: {
-        sourceType: 'script',
-      },
       env: {
         browser: false,
         node: true,

app/app.ts

@@ -4,6 +4,8 @@ import loadInitializers from 'ember-load-initializers';
 import config from 'croodle/config/environment';
 
 export default class App extends Application {
+  LOG_TRANSITIONS = true;
+
   modulePrefix = config.modulePrefix;
   podModulePrefix = config.podModulePrefix;
   Resolver = Resolver;

app/components/create-options-dates.js

@@ -1,38 +0,0 @@
-import Component from '@glimmer/component';
-import { action } from '@ember/object';
-import { isArray } from '@ember/array';
-import { DateTime } from 'luxon';
-import { tracked } from '@glimmer/tracking';
-
-export default class CreateOptionsDates extends Component {
-  @tracked calendarCenter =
-    this.selectedDays.length >= 1 ? this.selectedDays[0] : DateTime.local();
-
-  get selectedDays() {
-    return Array.from(this.args.options).map(({ value }) =>
-      DateTime.fromISO(value),
-    );
-  }
-
-  get calendarCenterNext() {
-    return this.calendarCenter.plus({ months: 1 });
-  }
-
-  @action
-  handleSelectedDaysChange({ datetime: newDatesAsLuxonDateTime }) {
-    if (!isArray(newDatesAsLuxonDateTime)) {
-      // special case: all options are unselected
-      this.args.updateOptions([]);
-      return;
-    }
-
-    this.args.updateOptions(
-      newDatesAsLuxonDateTime.map((datetime) => datetime.toISODate()),
-    );
-  }
-
-  @action
-  updateCalenderCenter(diff) {
-    this.calendarCenter = this.calendarCenter.add(diff, 'months');
-  }
-}

app/components/create-options-dates.ts

@@ -0,0 +1,48 @@
+import Component from '@glimmer/component';
+import { action } from '@ember/object';
+import { isArray } from '@ember/array';
+import { DateTime } from 'luxon';
+import { tracked } from '@glimmer/tracking';
+import type { TrackedSet } from 'tracked-built-ins';
+import type { FormDataOption } from './create-options';
+
+export interface CreateOptionsDatesSignature {
+  Args: {
+    options: TrackedSet<FormDataOption>;
+    updateOptions: (options: string[]) => void;
+  };
+}
+
+export default class CreateOptionsDates extends Component<CreateOptionsDatesSignature> {
+  @tracked calendarCenter =
+    this.selectedDays.length >= 1
+      ? (this.selectedDays[0] as DateTime)
+      : DateTime.local();
+
+  get selectedDays(): DateTime[] {
+    return Array.from(this.args.options).map(
+      ({ value }) => DateTime.fromISO(value) as DateTime,
+    );
+  }
+
+  get calendarCenterNext() {
+    return this.calendarCenter.plus({ months: 1 });
+  }
+
+  @action
+  handleSelectedDaysChange({
+    datetime: newDatesAsLuxonDateTime,
+  }: {
+    datetime: DateTime[];
+  }) {
+    if (!isArray(newDatesAsLuxonDateTime)) {
+      // special case: all options are unselected
+      this.args.updateOptions([]);
+      return;
+    }
+
+    this.args.updateOptions(
+      newDatesAsLuxonDateTime.map((datetime) => datetime.toISODate() as string),
+    );
+  }
+}

app/components/create-options-datetime.ts

@@ -5,15 +5,17 @@ import { tracked } from '@glimmer/tracking';
 import { TrackedMap, TrackedSet } from 'tracked-built-ins';
 import { DateTime } from 'luxon';
 import IntlMessage from '../utils/intl-message';
+import type RouterService from '@ember/routing/router-service';
+import type Transition from '@ember/routing/transition';
 
 class FormDataTimeOption {
   formData;
 
   // ISO 8601 date string: YYYY-MM-DD
-  date;
+  date: string;
 
   // ISO 8601 time string without seconds: HH:mm
-  @tracked time;
+  @tracked time: string | null;
 
   // helper property set by modifiers to track if input element is invalid
   // because user only entered the time partly (e.g. "10:--").
@@ -32,7 +34,7 @@ class FormDataTimeOption {
     // the same day already before. Only the second input field containing the
     // duplicated time should show the validation error.
     const { formData, date } = this;
-    const timesForThisDate = Array.from(formData.datetimes.get(date));
+    const timesForThisDate = Array.from(formData.datetimes.get(date)!);
     const isDuplicate = timesForThisDate
       .slice(0, timesForThisDate.indexOf(this))
       .some((timeOption) => timeOption.time == this.time);
@@ -64,11 +66,14 @@ class FormDataTimeOption {
     const { datetimes } = formData;
     return (
       Array.from(datetimes.keys())[0] === date &&
-      Array.from(datetimes.get(date))[0] === this
+      Array.from(datetimes.get(date)!)[0] === this
     );
   }
 
-  constructor(formData, { date, time }) {
+  constructor(
+    formData: FormData,
+    { date, time }: { date: string; time: string | null },
+  ) {
     this.formData = formData;
     this.date = date;
     this.time = time;
@@ -76,7 +81,7 @@ class FormDataTimeOption {
 }
 
 class FormData {
-  @tracked datetimes;
+  @tracked datetimes: Map<string, Set<FormDataTimeOption>>;
 
   get optionsValidation() {
     const { datetimes } = this;
@@ -87,7 +92,7 @@ class FormData {
         ),
     );
     if (!allTimeOptionsAreValid) {
-      return IntlMessage('create.options-datetime.error.invalidTime');
+      return new IntlMessage('create.options-datetime.error.invalidTime');
     }
 
     return null;
@@ -98,9 +103,9 @@ class FormData {
   }
 
   @action
-  addOption(date) {
+  addOption(date: string) {
     this.datetimes
-      .get(date)
+      .get(date)!
       .add(new FormDataTimeOption(this, { date, time: null }));
   }
 
@@ -109,8 +114,8 @@ class FormData {
    * otherwise it deletes time for this date
    */
   @action
-  deleteOption(option) {
-    const timeOptionsForDate = this.datetimes.get(option.date);
+  deleteOption(option: FormDataTimeOption) {
+    const timeOptionsForDate = this.datetimes.get(option.date)!;
 
     if (timeOptionsForDate.size > 1) {
       timeOptionsForDate.delete(option);
@@ -122,8 +127,8 @@ class FormData {
   @action
   adoptTimesOfFirstDay() {
     const timeOptionsForFirstDay = Array.from(
-      Array.from(this.datetimes.values())[0],
-    );
+      Array.from(this.datetimes.values())[0]!,
+    ) as FormDataTimeOption[];
     const timesForFirstDayAreValid = timeOptionsForFirstDay.every(
       (timeOption) => timeOption.isValid,
     );
@@ -143,12 +148,18 @@ class FormData {
     }
   }
 
-  constructor({ dates, times }) {
+  constructor({
+    dates,
+    times,
+  }: {
+    dates: Set<string>;
+    times: Map<string, Set<string>>;
+  }) {
     const datetimes = new Map();
 
     for (const date of dates) {
       const timesForDate = times.has(date)
-        ? Array.from(times.get(date))
+        ? Array.from(times.get(date) as Set<string>)
         : [null];
       datetimes.set(
         date,
@@ -164,12 +175,22 @@ class FormData {
   }
 }
 
-export default class CreateOptionsDatetime extends Component {
-  @service router;
+export interface CreateOptoinsDatetimeSignature {
+  Args: {
+    dates: TrackedSet<string>;
+    onNextPage: () => void;
+    onPrevPage: () => void;
+    times: Map<string, Set<string>>;
+    updateOptions: (datetimes: Map<string, Set<string>>) => void;
+  };
+}
+
+export default class CreateOptionsDatetime extends Component<CreateOptoinsDatetimeSignature> {
+  @service declare router: RouterService;
 
   formData = new FormData({ dates: this.args.dates, times: this.args.times });
 
-  @tracked errorMesage = null;
+  @tracked errorMessage: string | null = null;
 
   @action
   adoptTimesOfFirstDay() {
@@ -177,7 +198,7 @@ export default class CreateOptionsDatetime extends Component {
     const successful = formData.adoptTimesOfFirstDay();
 
     if (!successful) {
-      this.errorMesage =
+      this.errorMessage =
         'create.options-datetime.fix-validation-errors-first-day';
     }
   }
@@ -194,8 +215,8 @@ export default class CreateOptionsDatetime extends Component {
 
   // validate input field for being partially filled
   @action
-  validateInput(option, event) {
-    const element = event.target;
+  validateInput(option: FormDataTimeOption, event: InputEvent) {
+    const element = event.target as HTMLInputElement;
 
     // update partially filled time validation error
     option.isPartiallyFilled = !element.checkValidity();
@@ -203,8 +224,8 @@ export default class CreateOptionsDatetime extends Component {
 
   // remove partially filled validation error if user fixed it
   @action
-  updateInputValidation(option, event) {
-    const element = event.target;
+  updateInputValidation(option: FormDataTimeOption, event: InputEvent) {
+    const element = event.target as HTMLInputElement;
 
     if (element.checkValidity() && option.isPartiallyFilled) {
       option.isPartiallyFilled = false;
@@ -212,23 +233,25 @@ export default class CreateOptionsDatetime extends Component {
   }
 
   @action
-  handleTransition(transition) {
+  handleTransition(transition: Transition) {
     if (transition.from?.name === 'create.options-datetime') {
       this.args.updateOptions(
+        new Map(
           // FormData.datetimes Map has a Set of FormDataTime object as values
           // We need to transform it to a Set of plain time strings
-        new Map(
           Array.from(this.formData.datetimes.entries())
-            .map(([key, timeOptions]) => [
+            .map(([key, timeOptions]): [string, Set<string>] => {
+              return [
                 key,
                 new Set(
                   Array.from(timeOptions)
-                  .map(({ time }) => time)
+                    .map(({ time }: FormDataTimeOption) => time)
                     // There might be FormDataTime objects without a time, which
                     // we need to filter out
                     .filter((time) => time !== null),
-              ),
-            ])
+                ) as Set<string>,
+              ];
+            })
             // There might be dates without any time, which we need to filter out
             .filter(([, times]) => times.size > 0),
         ),
@@ -237,8 +260,8 @@ export default class CreateOptionsDatetime extends Component {
     }
   }
 
-  constructor() {
-    super(...arguments);
+  constructor(owner: unknown, args: CreateOptoinsDatetimeSignature['Args']) {
+    super(owner, args);
 
     this.router.on('routeWillChange', this.handleTransition);
   }

app/components/create-options.ts

@@ -1,11 +1,13 @@
 import Component from '@glimmer/component';
 import { inject as service } from '@ember/service';
 import { action } from '@ember/object';
-import { TrackedArray } from 'tracked-built-ins';
+import { TrackedArray, TrackedSet } from 'tracked-built-ins';
 import IntlMessage from '../utils/intl-message';
 import { tracked } from '@glimmer/tracking';
+import type RouterService from '@ember/routing/router-service';
+import type Transition from '@ember/routing/transition';
 
-class FormDataOption {
+export class FormDataOption {
   @tracked value;
   formData;
 
@@ -33,7 +35,7 @@ class FormDataOption {
     return this.valueValidation === null;
   }
 
-  constructor(formData, value) {
+  constructor(formData: FormData, value: string) {
     this.formData = formData;
     this.value = value;
   }
@@ -59,25 +61,28 @@ class FormData {
   }
 
   @action
-  updateOptions(values) {
+  updateOptions(values: string[]) {
     this.options = new TrackedArray(
       values.map((value) => new FormDataOption(this, value)),
     );
   }
 
   @action
-  addOption(value, afterPosition = this.options.length - 1) {
+  addOption(value: string, afterPosition = this.options.length - 1) {
     const option = new FormDataOption(this, value);
 
     this.options.splice(afterPosition + 1, 0, option);
   }
 
   @action
-  deleteOption(option) {
+  deleteOption(option: FormDataOption) {
     this.options.splice(this.options.indexOf(option), 1);
   }
 
-  constructor({ options }, { defaultOptionCount }) {
+  constructor(
+    { options }: { options: Set<string> },
+    { defaultOptionCount }: { defaultOptionCount: number },
+  ) {
     const normalizedOptions =
       options.size === 0 && defaultOptionCount > 0
         ? ['', '']
@@ -89,8 +94,18 @@ class FormData {
   }
 }
 
-export default class CreateOptionsComponent extends Component {
-  @service router;
+export interface CreateOptionsSignature {
+  Args: {
+    isMakeAPoll: boolean;
+    options: TrackedSet<string>;
+    onNextPage: () => void;
+    onPrevPage: () => void;
+    updateOptions: (options: { value: string }[]) => void;
+  };
+}
+
+export default class CreateOptionsComponent extends Component<CreateOptionsSignature> {
+  @service declare router: RouterService;
 
   formData = new FormData(
     { options: this.args.options },
@@ -108,15 +123,15 @@ export default class CreateOptionsComponent extends Component {
   }
 
   @action
-  handleTransition(transition) {
+  handleTransition(transition: Transition) {
     if (transition.from?.name === 'create.options') {
       this.args.updateOptions(this.formData.options);
       this.router.off('routeWillChange', this.handleTransition);
     }
   }
 
-  constructor() {
-    super(...arguments);
+  constructor(owner: unknown, args: CreateOptionsSignature['Args']) {
+    super(owner, args);
 
     this.router.on('routeWillChange', this.handleTransition);
   }

app/components/language-select.ts

@@ -2,25 +2,26 @@ import Component from '@glimmer/component';
 import { inject as service } from '@ember/service';
 import localesMeta from 'croodle/locales/meta';
 import { action } from '@ember/object';
+import type IntlService from 'ember-intl/services/intl';
+import type PowerCalendarService from 'ember-power-calendar/services/power-calendar';
 
 export default class LanguageSelect extends Component {
-  @service intl;
-  @service powerCalendar;
+  @service declare intl: IntlService;
+  @service declare powerCalendar: PowerCalendarService;
 
   get currentLocale() {
     return this.intl.primaryLocale;
   }
 
-  get locales() {
-    return localesMeta;
-  }
+  locales = localesMeta;
 
   @action
-  handleChange(event) {
-    const locale = event.target.value;
+  handleChange(event: Event) {
+    const selectElement = event.target as HTMLSelectElement;
+    const locale = selectElement.value as keyof typeof this.locales;
 
     this.intl.locale = locale.includes('-')
-      ? [locale, locale.split('-')[0]]
+      ? [locale, locale.split('-')[0] as string]
       : [locale];
     this.powerCalendar.locale = locale;
 

app/components/poll-evaluation-participants-table.ts

@@ -1,7 +1,14 @@
 import Component from '@glimmer/component';
+import type Poll from 'croodle/models/poll';
 import { DateTime } from 'luxon';
 
-export default class PollEvaluationParticipantsTable extends Component {
+export interface PollEvaluationParticipantsTableSignature {
+  Args: {
+    poll: Poll;
+  };
+}
+
+export default class PollEvaluationParticipantsTable extends Component<PollEvaluationParticipantsTableSignature> {
   get optionsPerDay() {
     const { poll } = this.args;
 

app/components/poll-evaluation-summary.ts

@@ -1,8 +1,19 @@
 import Component from '@glimmer/component';
 import { inject as service } from '@ember/service';
+import type IntlService from 'ember-intl/services/intl';
+import type Option from 'croodle/models/option';
+import type User from 'croodle/models/user';
+import type { Answer } from 'croodle/utils/answers-for-answer-type';
+import type Poll from 'croodle/models/poll';
 
-export default class PollEvaluationSummary extends Component {
-  @service intl;
+export interface PollEvaluationSummarySignature {
+  Args: {
+    poll: Poll;
+  };
+}
+
+export default class PollEvaluationSummary extends Component<PollEvaluationSummarySignature> {
+  @service declare intl: IntlService;
 
   get bestOptions() {
     const { poll } = this.args;
@@ -18,34 +29,41 @@ export default class PollEvaluationSummary extends Component {
       return undefined;
     }
 
-    let answers = poll.answers.reduce((answers, answer) => {
+    const answers = poll.answers.reduce(
+      (answers: Record<string, number>, answer: Answer) => {
         answers[answer.type] = 0;
         return answers;
-    }, {});
-    let evaluation = options.map((option) => {
+      },
+      {},
+    );
+    const evaluation: {
+      answers: Record<string, number>;
+      option: Option;
+      score: number;
+    }[] = options.map((option: Option) => {
       return {
         answers: { ...answers },
         option,
         score: 0,
       };
     });
-    let bestOptions = [];
+    const bestOptions = [];
 
-    users.forEach((user) => {
+    users.forEach((user: User) => {
       user.selections.forEach(({ type }, i) => {
-        evaluation[i].answers[type]++;
+        evaluation[i]!.answers[type]++;
 
         switch (type) {
           case 'yes':
-            evaluation[i].score += 2;
+            evaluation[i]!.score += 2;
             break;
 
           case 'maybe':
-            evaluation[i].score += 1;
+            evaluation[i]!.score += 1;
             break;
 
           case 'no':
-            evaluation[i].score -= 2;
+            evaluation[i]!.score -= 2;
             break;
         }
       });
@@ -53,9 +71,9 @@ export default class PollEvaluationSummary extends Component {
 
     evaluation.sort((a, b) => b.score - a.score);
 
-    let bestScore = evaluation[0].score;
+    const bestScore = evaluation[0]!.score;
     for (let i = 0; i < evaluation.length; i++) {
-      if (bestScore === evaluation[i].score) {
+      if (bestScore === evaluation[i]!.score) {
         bestOptions.push(evaluation[i]);
       } else {
         break;

app/config/environment.d.ts

@@ -0,0 +1,16 @@
+/**
+ * Type declarations for
+ *    import config from 'croodle/config/environment'
+ */
+declare const config: {
+  environment: string;
+  modulePrefix: string;
+  podModulePrefix: string;
+  locationType: 'history' | 'hash' | 'none';
+  rootURL: string;
+  APP: {
+    version: string;
+  };
+};
+
+export default config;

app/controllers/application.ts

@@ -1,6 +1,7 @@
 import Controller from '@ember/controller';
 import { inject as service } from '@ember/service';
+import type FlashMessagesService from 'ember-cli-flash/services/flash-messages';
 
 export default class ApplicationController extends Controller {
-  @service flashMessages;
+  @service declare flashMessages: FlashMessagesService;
 }

app/controllers/create.ts

@@ -2,16 +2,22 @@ import { inject as service } from '@ember/service';
 import { action } from '@ember/object';
 import Controller from '@ember/controller';
 import { TrackedSet } from 'tracked-built-ins';
+import type RouterService from '@ember/routing/router-service';
+import type { CreateRouteModel } from 'croodle/routes/create';
 
 export default class CreateController extends Controller {
-  @service router;
+  @service declare router: RouterService;
+
+  declare model: CreateRouteModel;
+
+  visitedSteps = new TrackedSet();
 
   get canEnterMetaStep() {
     return this.visitedSteps.has('meta') && this.model.pollType;
   }
 
   get canEnterOptionsStep() {
-    let { title } = this.model;
+    const { title } = this.model;
     return (
       this.visitedSteps.has('options') &&
       typeof title === 'string' &&
@@ -40,18 +46,18 @@ export default class CreateController extends Controller {
 
   @action
   updateVisitedSteps() {
-    let { currentRouteName } = this.router;
+    const { currentRouteName } = this.router;
 
     // currentRouteName might not be defined in some edge cases
     if (!currentRouteName) {
       return;
     }
 
-    let step = currentRouteName.split('.').pop();
+    const step = currentRouteName.split('.').pop();
     this.visitedSteps.add(step);
   }
 
-  @action transitionTo(route) {
+  @action transitionTo(route: string) {
     this.router.transitionTo(route);
   }
 

app/controllers/create/index.ts

@@ -1,9 +1,14 @@
 import Controller from '@ember/controller';
 import { inject as service } from '@ember/service';
 import { action } from '@ember/object';
+import type RouterService from '@ember/routing/router-service';
+import type Transition from '@ember/routing/transition';
+import type { CreateRouteIndexModel } from 'croodle/routes/create/index';
 
 export default class CreateIndex extends Controller {
-  @service router;
+  @service declare router: RouterService;
+
+  declare model: CreateRouteIndexModel;
 
   @action
   submit() {
@@ -11,7 +16,7 @@ export default class CreateIndex extends Controller {
   }
 
   @action
-  handleTransition(transition) {
+  handleTransition(transition: Transition) {
     if (transition.from?.name === 'create.index') {
       const { poll, formData } = this.model;
 
@@ -20,6 +25,7 @@ export default class CreateIndex extends Controller {
   }
 
   constructor() {
+    // eslint-disable-next-line prefer-rest-params
     super(...arguments);
 
     this.router.on('routeWillChange', this.handleTransition);

app/controllers/create/meta.ts

@@ -1,9 +1,14 @@
 import { inject as service } from '@ember/service';
 import { action } from '@ember/object';
 import Controller from '@ember/controller';
+import type RouterService from '@ember/routing/router-service';
+import type Transition from '@ember/routing/transition';
+import type { CreateMetaRouteModel } from 'croodle/routes/create/meta';
 
 export default class CreateMetaController extends Controller {
-  @service router;
+  @service declare router: RouterService;
+
+  declare model: CreateMetaRouteModel;
 
   @action
   previousPage() {
@@ -16,7 +21,7 @@ export default class CreateMetaController extends Controller {
   }
 
   @action
-  handleTransition(transition) {
+  handleTransition(transition: Transition) {
     if (transition.from?.name === 'create.meta') {
       const { poll, formData } = this.model;
 
@@ -26,6 +31,7 @@ export default class CreateMetaController extends Controller {
   }
 
   constructor() {
+    // eslint-disable-next-line prefer-rest-params
     super(...arguments);
 
     this.router.on('routeWillChange', this.handleTransition);

app/controllers/create/options-datetime.ts

@@ -1,9 +1,13 @@
 import Controller from '@ember/controller';
 import { action } from '@ember/object';
 import { inject as service } from '@ember/service';
+import type { CreateOptionsDatetimeRouteModel } from 'croodle/routes/create/options-datetime';
+import type RouterService from '@ember/routing/router-service';
 
 export default class CreateOptionsDatetimeController extends Controller {
-  @service router;
+  @service declare router: RouterService;
+
+  declare model: CreateOptionsDatetimeRouteModel;
 
   @action
   nextPage() {
@@ -16,7 +20,7 @@ export default class CreateOptionsDatetimeController extends Controller {
   }
 
   @action
-  updateOptions(datetimes) {
+  updateOptions(datetimes: Map<string, Set<string>>) {
     this.model.timesForDateOptions = new Map(datetimes.entries());
   }
 }

app/controllers/create/options.ts

@@ -1,10 +1,14 @@
 import Controller from '@ember/controller';
 import { inject as service } from '@ember/service';
 import { action } from '@ember/object';
-import { TrackedSet } from 'tracked-built-ins/.';
+import { TrackedSet } from 'tracked-built-ins';
+import type RouterService from '@ember/routing/router-service';
+import type { CreateOptionsRouteModel } from 'croodle/routes/create/options';
 
 export default class CreateOptionsController extends Controller {
-  @service router;
+  @service declare router: RouterService;
+
+  declare model: CreateOptionsRouteModel;
 
   @action
   nextPage() {
@@ -23,7 +27,7 @@ export default class CreateOptionsController extends Controller {
   }
 
   @action
-  updateOptions(newOptions) {
+  updateOptions(newOptions: { value: string }[]) {
     const { pollType } = this.model;
     const options = newOptions.map(({ value }) => value);
 

app/controllers/create/settings.ts

@@ -5,11 +5,17 @@ import { action } from '@ember/object';
 import { DateTime, Duration } from 'luxon';
 import Poll from '../../models/poll';
 import { generatePassphrase } from '../../utils/encryption';
+import type RouterService from '@ember/routing/router-service';
+import type { CreateSettingsRouteModel } from 'croodle/routes/create/settings';
+import type IntlService from 'ember-intl/services/intl';
+import type FlashMessagesService from 'ember-cli-flash/services/flash-messages';
 
 export default class CreateSettings extends Controller {
-  @service flashMessages;
-  @service intl;
-  @service router;
+  @service declare flashMessages: FlashMessagesService;
+  @service declare intl: IntlService;
+  @service declare router: RouterService;
+
+  declare model: CreateSettingsRouteModel;
 
   get anonymousUser() {
     return this.model.anonymousUser;
@@ -39,7 +45,7 @@ export default class CreateSettings extends Controller {
   }
   set expirationDuration(value) {
     this.model.expirationDate = isPresent(value)
-      ? DateTime.local().plus(Duration.fromISO(value)).toISO()
+      ? (DateTime.local().plus(Duration.fromISO(value)).toISO() as string)
       : '';
   }
 
@@ -78,7 +84,7 @@ export default class CreateSettings extends Controller {
 
   @action
   previousPage() {
-    let { pollType } = this.model;
+    const { pollType } = this.model;
 
     if (pollType === 'FindADate') {
       this.router.transitionTo('create.options-datetime');
@@ -104,22 +110,22 @@ export default class CreateSettings extends Controller {
     } = model;
 
     // calculate options
-    let options = [];
+    const options: string[] = [];
     if (pollType === 'FindADate') {
       // merge date with times
       for (const date of dateOptions) {
         if (timesForDateOptions.has(date)) {
-          for (const time of timesForDateOptions.get(date)) {
-            const [hour, minute] = time.split(':');
+          for (const time of timesForDateOptions.get(date)!) {
+            const [hour, minute] = time.split(':') as [string, string];
             options.push(
               DateTime.fromISO(date)
                 .set({
-                  hour,
-                  minute,
+                  hour: parseInt(hour),
+                  minute: parseInt(minute),
                   second: 0,
                   millisecond: 0,
                 })
-                .toISO(),
+                .toISO() as string,
             );
           }
         } else {
@@ -139,7 +145,6 @@ export default class CreateSettings extends Controller {
         {
           anonymousUser,
           answerType,
-          creationDate: new Date().toISOString(),
           description,
           expirationDate,
           forceAnswer,

app/controllers/poll.ts

@@ -4,11 +4,17 @@ import { isPresent, isEmpty } from '@ember/utils';
 import { action } from '@ember/object';
 import { DateTime } from 'luxon';
 import { tracked } from '@glimmer/tracking';
+import type FlashMessagesService from 'ember-cli-flash/services/flash-messages';
+import type IntlService from 'ember-intl/services/intl';
+import type RouterService from '@ember/routing/router-service';
+import type { PollRouteModel } from 'croodle/routes/poll';
 
 export default class PollController extends Controller {
-  @service flashMessages;
-  @service intl;
-  @service router;
+  @service declare flashMessages: FlashMessagesService;
+  @service declare intl: IntlService;
+  @service declare router: RouterService;
+
+  declare model: PollRouteModel;
 
   queryParams = ['encryptionKey'];
   encryptionKey = '';
@@ -61,8 +67,8 @@ export default class PollController extends Controller {
   }
 
   @action
-  linkAction(type) {
-    let flashMessages = this.flashMessages;
+  linkAction(type: 'copied' | 'selected') {
+    const flashMessages = this.flashMessages;
     switch (type) {
       case 'copied':
         flashMessages.success(`poll.link.copied`);

app/helpers/format-date-relative.ts

@@ -1,11 +1,20 @@
 import Helper from '@ember/component/helper';
 import { DateTime } from 'luxon';
 import { inject as service } from '@ember/service';
+import type IntlService from 'ember-intl/services/intl';
+
+type Positional = [date: Date | string];
+
+export interface FormatDateRelativeHelperSignature {
+  Args: {
+    Positional: Positional;
+  };
+}
 
 export default class FormatDateRelativeHelper extends Helper {
-  @service intl;
+  @service declare intl: IntlService;
 
-  compute([date]) {
+  compute([date]: Positional) {
     if (date instanceof Date) {
       date = date.toISOString();
     }

app/helpers/mark-as-safe-html.ts

@@ -0,0 +1,16 @@
+import { helper } from '@ember/component/helper';
+import { htmlSafe } from '@ember/template';
+
+type Positional = [html: string];
+
+export interface MarkAsSafeHtmlHelperSignature {
+  Args: {
+    Positional: Positional;
+  };
+}
+
+export default helper<MarkAsSafeHtmlHelperSignature>(function markAsSafeHtml([
+  html,
+]) {
+  return htmlSafe(html);
+});

app/helpers/scroll-first-invalid-element-into-view-port.ts

@@ -2,23 +2,33 @@ import { helper } from '@ember/component/helper';
 import { next } from '@ember/runloop';
 import { assert } from '@ember/debug';
 
-function elementIsNotVisible(element) {
-  let elementPosition = element.getBoundingClientRect();
-  let windowHeight = window.innerHeight;
+function elementIsNotVisible(element: Element) {
+  const elementPosition = element.getBoundingClientRect();
+  const windowHeight = window.innerHeight;
 
-  // an element is not visible if
-  return (
-    false ||
-    // it's above the current view port
+  // check if the element is within current view port
+  if (
+    // above current view port
     elementPosition.top <= 0 ||
-    // it's below the current view port
-    elementPosition.bottom >= windowHeight ||
-    // it's in current view port but hidden by fixed navigation
-    (getComputedStyle(document.querySelector('.cr-steps-bottom-nav'))
-      .position === 'fixed' &&
-      elementPosition.bottom >=
-        windowHeight -
-          document.querySelector('.cr-steps-bottom-nav').offsetHeight)
+    // below current view port
+    elementPosition.bottom >= windowHeight
+  ) {
+    return true;
+  }
+
+  // check if element is within current view port button hidden behind
+  // fixed bottom navigation bar
+  const bottomNavEl = document.querySelector(
+    '.cr-steps-bottom-nav',
+  ) as HTMLElement | null;
+  if (!bottomNavEl) {
+    // bottom navigation bar can not overlay element if it does not exist
+    return false;
+  }
+
+  return (
+    getComputedStyle(bottomNavEl).position === 'fixed' &&
+    elementPosition.bottom >= windowHeight - bottomNavEl.offsetHeight
   );
 }
 
@@ -27,9 +37,9 @@ export function scrollFirstInvalidElementIntoViewPort() {
   // timing issue in Firefox causing the Browser not scrolling up far enough if doing so
   // delaying to next runloop therefore
   next(function () {
-    let invalidInput = document.querySelector(
+    const invalidInput = document.querySelector(
       '.form-control.is-invalid, .custom-control-input.is-invalid',
-    );
+    ) as HTMLInputElement;
     assert(
       'Atleast one form control must be marked as invalid if form submission was rejected as invalid',
       invalidInput,
@@ -46,7 +56,7 @@ export function scrollFirstInvalidElementIntoViewPort() {
       // https://github.com/kaliber5/ember-bootstrap/issues/931
       // As a work-a-round we look the correct label up by a custom convention for the `id` of the
       // inputs and the `for` of the input group `<label>` (which should be a `<legend>`).
-      let scrollTarget =
+      const scrollTarget =
         document.querySelector(
           `label[for="${invalidInput.id.substr(
             0,

app/models/option.ts

@@ -7,7 +7,7 @@ export default class Option {
   // 1) ISO 8601 date string: `YYYY-MM-DD`
   // 2) ISO 8601 datetime string: `YYYY-MM-DDTHH:mm:ss.0000+01:00`
   // 3) Free text if poll type is MakeAPoll
-  title;
+  title: string;
 
   get datetime() {
     const { title } = this;
@@ -16,16 +16,18 @@ export default class Option {
       return null;
     }
 
-    return DateTime.fromISO(title);
+    const datetime = DateTime.fromISO(title);
+
+    return datetime.isValid ? datetime : null;
   }
 
   get isDate() {
     const { datetime } = this;
-    return datetime !== null && datetime.isValid;
+    return datetime !== null;
   }
 
   get day() {
-    if (!this.isDate) {
+    if (!this.datetime) {
       return null;
     }
 
@@ -33,6 +35,10 @@ export default class Option {
   }
 
   get jsDate() {
+    if (!this.datetime) {
+      return null;
+    }
+
     return this.datetime.toJSDate();
   }
 
@@ -41,14 +47,14 @@ export default class Option {
   }
 
   get time() {
-    if (!this.isDate || !this.hasTime) {
+    if (!this.datetime || !this.hasTime) {
       return null;
     }
 
-    return this.datetime.toISOTime().substring(0, 5);
+    return this.datetime.toISOTime()?.substring(0, 5);
   }
 
-  constructor({ title }) {
+  constructor({ title }: { title: string }) {
     this.title = title;
   }
 }

app/models/poll.ts

@@ -6,48 +6,68 @@ import { decrypt, encrypt } from '../utils/encryption';
 import answersForAnswerType from '../utils/answers-for-answer-type';
 import fetch from 'fetch';
 import config from 'croodle/config/environment';
+import type { SelectionInput } from './selection';
 
 const DAY_STRING_LENGTH = 10; // 'YYYY-MM-DD'.length
 
+export type AnswerType = 'YesNo' | 'YesNoMaybe' | 'FreeText';
+type OptionInput = { title: string }[];
+export type PollType = 'FindADate' | 'MakeAPoll';
+type PollInput = {
+  anonymousUser: boolean;
+  answerType: AnswerType;
+  creationDate: string;
+  description: string;
+  expirationDate: string;
+  forceAnswer: boolean;
+  id: string;
+  options: OptionInput;
+  pollType: PollType;
+  timezone: string | null;
+  title: string;
+  users: User[];
+  version: string;
+};
+
 export default class Poll {
   // Is participation without user name possibile?
-  anonymousUser;
+  anonymousUser: boolean;
 
   // YesNo, YesNoMaybe or Freetext
-  answerType;
+  answerType: AnswerType;
 
   // ISO-8601 combined date and time string in UTC
-  creationDate;
+  creationDate: string;
 
   // poll's description
-  description;
+  description: string;
 
   // ISO 8601 date + time string in UTC
-  expirationDate;
+  expirationDate: string;
 
   // Must all options been answered?
-  forceAnswer;
+  forceAnswer: boolean;
 
   // ID of the poll
-  id;
+  id: string;
 
   // array of poll's options
-  options;
+  options: Option[];
 
   // FindADate or MakeAPoll
-  pollType;
+  pollType: 'FindADate' | 'MakeAPoll';
 
   // timezone poll got created in (like "Europe/Berlin")
-  timezone;
+  timezone: string | null;
 
   // polls title
-  title;
+  title: string;
 
   // participants of the poll
-  users;
+  users: TrackedArray<User>;
 
   // Croodle version poll got created with
-  version;
+  version: string;
 
   get answers() {
     const { answerType } = this;
@@ -90,7 +110,7 @@ export default class Poll {
     title,
     users,
     version,
-  }) {
+  }: PollInput) {
     this.anonymousUser = anonymousUser;
     this.answerType = answerType;
     this.creationDate = creationDate;
@@ -106,7 +126,7 @@ export default class Poll {
     this.version = version;
   }
 
-  static async load(id, passphrase) {
+  static async load(id: string, passphrase: string) {
     const url = apiUrl(`polls/${id}`);
 
     // TODO: Handle network connectivity error
@@ -125,26 +145,51 @@ export default class Poll {
     }
 
     // TODO: Handle malformed server response
-    const payload = await response.json();
+    const payload = (await response.json()) as {
+      poll: {
+        anonymousUser: string;
+        answerType: string;
+        creationDate: string;
+        description: string;
+        expirationDate: string;
+        forceAnswer: string;
+        id: string;
+        options: string;
+        pollType: string;
+        timezone: string;
+        title: string;
+        users: {
+          creationDate: string;
+          id: string;
+          name: string;
+          selections: string;
+          version: string;
+        }[];
+        version: string;
+      };
+    };
 
     return new Poll({
-      anonymousUser: decrypt(payload.poll.anonymousUser, passphrase),
-      answerType: decrypt(payload.poll.answerType, passphrase),
-      creationDate: decrypt(payload.poll.creationDate, passphrase),
-      description: decrypt(payload.poll.description, passphrase),
-      expirationDate: decrypt(payload.poll.expirationDate, passphrase),
-      forceAnswer: decrypt(payload.poll.forceAnswer, passphrase),
+      anonymousUser: decrypt(payload.poll.anonymousUser, passphrase) as boolean,
+      answerType: decrypt(payload.poll.answerType, passphrase) as AnswerType,
+      creationDate: decrypt(payload.poll.creationDate, passphrase) as string,
+      description: decrypt(payload.poll.description, passphrase) as string,
+      expirationDate: decrypt(
+        payload.poll.expirationDate,
+        passphrase,
+      ) as string,
+      forceAnswer: decrypt(payload.poll.forceAnswer, passphrase) as boolean,
       id: payload.poll.id,
-      options: decrypt(payload.poll.options, passphrase),
-      pollType: decrypt(payload.poll.pollType, passphrase),
-      timezone: decrypt(payload.poll.timezone, passphrase),
-      title: decrypt(payload.poll.title, passphrase),
+      options: decrypt(payload.poll.options, passphrase) as OptionInput,
+      pollType: decrypt(payload.poll.pollType, passphrase) as PollType,
+      timezone: decrypt(payload.poll.timezone, passphrase) as string,
+      title: decrypt(payload.poll.title, passphrase) as string,
       users: payload.poll.users.map((user) => {
         return new User({
-          creationDate: decrypt(user.creationDate, passphrase),
+          creationDate: decrypt(user.creationDate, passphrase) as string,
           id: user.id,
-          name: decrypt(user.name, passphrase),
-          selections: decrypt(user.selections, passphrase),
+          name: decrypt(user.name, passphrase) as string,
+          selections: decrypt(user.selections, passphrase) as SelectionInput[],
           version: user.version,
         });
       }),
@@ -162,15 +207,24 @@ export default class Poll {
       options,
       pollType,
       title,
+    }: {
+      anonymousUser: boolean;
+      answerType: AnswerType;
+      description: string;
+      expirationDate: string;
+      forceAnswer: boolean;
+      options: OptionInput;
+      pollType: PollType;
+      title: string;
     },
-    passphrase,
+    passphrase: string,
   ) {
     const creationDate = new Date().toISOString();
     const version = config.APP.version;
     const timezone =
       pollType === 'FindADate' &&
       options.some(({ title }) => {
-        return title >= 'YYYY-MM-DDTHH:mm'.length;
+        return title.length >= 'YYYY-MM-DDTHH:mm'.length;
       })
         ? Intl.DateTimeFormat().resolvedOptions().timeZone
         : null;

app/models/selection.js

@@ -1,13 +0,0 @@
-export default class Answer {
-  icon;
-  label;
-  labelTranslation;
-  type;
-
-  constructor({ icon, label, labelTranslation, type }) {
-    this.icon = icon;
-    this.label = label;
-    this.labelTranslation = labelTranslation;
-    this.type = type;
-  }
-}

app/models/selection.ts

@@ -0,0 +1,20 @@
+export type SelectionInput = {
+  icon: string;
+  label: string;
+  labelTranslation: string;
+  type: string;
+};
+
+export default class Selection {
+  icon: string;
+  label: string;
+  labelTranslation: string;
+  type: string;
+
+  constructor({ icon, label, labelTranslation, type }: SelectionInput) {
+    this.icon = icon;
+    this.label = label;
+    this.labelTranslation = labelTranslation;
+    this.type = type;
+  }
+}

app/models/user.ts

@@ -1,26 +1,35 @@
-import Selection from './selection';
+import Selection, { type SelectionInput } from './selection';
 import config from 'croodle/config/environment';
 import { encrypt } from '../utils/encryption';
 import { apiUrl } from '../utils/api';
 import fetch from 'fetch';
+import type Poll from './poll';
+
+type UserInput = {
+  creationDate: string;
+  id: string;
+  name: string;
+  selections: SelectionInput[];
+  version: string;
+};
 
 export default class User {
   // ISO 8601 date + time string
-  creationDate;
+  creationDate: string;
 
-  id;
+  id: string;
 
   // user name
-  name;
+  name: string;
 
   // array of users selections
   // must be in same order as options property of poll
-  selections;
+  selections: Selection[];
 
   // Croodle version user got created with
-  version;
+  version: string;
 
-  constructor({ creationDate, id, name, selections, version }) {
+  constructor({ creationDate, id, name, selections, version }: UserInput) {
     this.creationDate = creationDate;
     this.id = id;
     this.name = name;
@@ -28,7 +37,14 @@ export default class User {
     this.version = version;
   }
 
-  static async create({ name, poll, selections }, passphrase) {
+  static async create(
+    {
+      name,
+      poll,
+      selections,
+    }: { name: string; poll: Poll; selections: SelectionInput[] },
+    passphrase: string,
+  ) {
     const creationDate = new Date().toISOString();
     const version = config.APP.version;
 

app/modifiers/autofocus.ts

@@ -1,9 +1,20 @@
 import Modifier from 'ember-modifier';
 
-export default class AutofocusModifier extends Modifier {
+type Named = {
+  enabled: boolean;
+};
+
+interface AutofocusModifierSignature {
+  Element: HTMLInputElement;
+  Args: {
+    Named: Named;
+  };
+}
+
+export default class AutofocusModifier extends Modifier<AutofocusModifierSignature> {
   isInstalled = false;
 
-  modify(element, positional, { enabled = true }) {
+  modify(element: HTMLInputElement, _: [], { enabled = true }: Named) {
     // element should be only autofocused on initial render
     // not when `enabled` option is invalidated
     if (this.isInstalled) {

app/router.ts

@@ -17,5 +17,4 @@ Router.map(function () {
     this.route('options-datetime');
     this.route('settings');
   });
-  this.route('404');
 });

app/routes/create.js

@@ -1,43 +0,0 @@
-import { inject as service } from '@ember/service';
-import Route from '@ember/routing/route';
-import { DateTime } from 'luxon';
-import { tracked } from '@glimmer/tracking';
-import { TrackedSet } from 'tracked-built-ins';
-
-class PollData {
-  @tracked anonymousUser = false;
-  @tracked answerType = 'YesNo';
-  @tracked description = '';
-  @tracked expirationDate = DateTime.local().plus({ months: 3 }).toISO();
-  @tracked forceAnswer = true;
-  @tracked freetextOptions = new TrackedSet();
-  @tracked dateOptions = new TrackedSet();
-  @tracked timesForDateOptions = new Map();
-  @tracked pollType = 'FindADate';
-  @tracked title = '';
-}
-
-export default class CreateRoute extends Route {
-  @service router;
-
-  beforeModel(transition) {
-    // enforce that wizzard is started at create.index
-    if (transition.targetName !== 'create.index') {
-      this.router.transitionTo('create.index');
-    }
-  }
-
-  model() {
-    return new PollData();
-  }
-
-  activate() {
-    let controller = this.controllerFor(this.routeName);
-    controller.listenForStepChanges();
-  }
-
-  deactivate() {
-    let controller = this.controllerFor(this.routeName);
-    controller.clearListenerForStepChanges();
-  }
-}

app/routes/create.ts

@@ -0,0 +1,52 @@
+import { inject as service } from '@ember/service';
+import Route from '@ember/routing/route';
+import RouterService from '@ember/routing/router-service';
+import type Transition from '@ember/routing/transition';
+import { DateTime } from 'luxon';
+import { tracked } from '@glimmer/tracking';
+import { TrackedSet } from 'tracked-built-ins';
+import type CreateController from 'croodle/controllers/create';
+import type { AnswerType, PollType } from 'croodle/models/poll';
+
+class PollData {
+  @tracked anonymousUser: boolean = false;
+  @tracked answerType: AnswerType = 'YesNo';
+  @tracked description: string = '';
+  @tracked expirationDate: string = DateTime.local()
+    .plus({ months: 3 })
+    .toISO() as string;
+  @tracked forceAnswer: boolean = true;
+  @tracked freetextOptions: TrackedSet<string> = new TrackedSet();
+  @tracked dateOptions: TrackedSet<string> = new TrackedSet();
+  @tracked timesForDateOptions: Map<string, Set<string>> = new Map();
+  @tracked pollType: PollType = 'FindADate';
+  @tracked title: string = '';
+}
+
+export default class CreateRoute extends Route {
+  @service declare router: RouterService;
+
+  beforeModel(transition: Transition) {
+    // enforce that wizzard is started at create.index
+    if (transition.to.name !== 'create.index') {
+      this.router.transitionTo('create.index');
+    }
+  }
+
+  model() {
+    return new PollData();
+  }
+
+  activate() {
+    const controller = this.controllerFor(this.routeName) as CreateController;
+    controller.listenForStepChanges();
+  }
+
+  deactivate() {
+    const controller = this.controllerFor(this.routeName) as CreateController;
+    controller.clearListenerForStepChanges();
+  }
+}
+
+type Resolved<P> = P extends Promise<infer T> ? T : P;
+export type CreateRouteModel = Resolved<ReturnType<CreateRoute['model']>>;

app/routes/create/index.js

@@ -1,21 +0,0 @@
-import Route from '@ember/routing/route';
-import { tracked } from '@glimmer/tracking';
-
-class FormData {
-  @tracked pollType;
-
-  constructor({ pollType }) {
-    this.pollType = pollType;
-  }
-}
-
-export default class IndexRoute extends Route {
-  model() {
-    const { pollType } = this.modelFor('create');
-
-    return {
-      formData: new FormData({ pollType }),
-      poll: this.modelFor('create'),
-    };
-  }
-}

app/routes/create/index.ts

@@ -0,0 +1,28 @@
+import Route from '@ember/routing/route';
+import { tracked } from '@glimmer/tracking';
+import type { PollType } from 'croodle/models/poll';
+import type { CreateRouteModel } from '../create';
+
+class FormData {
+  @tracked declare pollType;
+
+  constructor({ pollType }: { pollType: PollType }) {
+    this.pollType = pollType;
+  }
+}
+
+export default class CreateIndexRoute extends Route {
+  model() {
+    const { pollType } = this.modelFor('create') as CreateRouteModel;
+
+    return {
+      formData: new FormData({ pollType }),
+      poll: this.modelFor('create') as CreateRouteModel,
+    };
+  }
+}
+
+type Resolved<P> = P extends Promise<infer T> ? T : P;
+export type CreateRouteIndexModel = Resolved<
+  ReturnType<CreateIndexRoute['model']>
+>;

app/routes/create/meta.ts

@@ -1,10 +1,11 @@
 import Route from '@ember/routing/route';
 import { tracked } from '@glimmer/tracking';
 import IntlMessage from '../../utils/intl-message';
+import type { CreateRouteModel } from '../create';
 
 class FormData {
-  @tracked title;
-  @tracked description;
+  @tracked title: string;
+  @tracked description: string;
 
   get titleValidation() {
     const { title } = this;
@@ -22,19 +23,24 @@ class FormData {
     return null;
   }
 
-  constructor({ title, description }) {
+  constructor({ title, description }: { title: string; description: string }) {
     this.title = title;
     this.description = description;
   }
 }
 
-export default class MetaRoute extends Route {
+export default class CreateMetaRoute extends Route {
   model() {
-    const { title, description } = this.modelFor('create');
+    const { title, description } = this.modelFor('create') as CreateRouteModel;
 
     return {
       formData: new FormData({ title, description }),
-      poll: this.modelFor('create'),
+      poll: this.modelFor('create') as CreateRouteModel,
     };
   }
 }
+
+type Resolved<P> = P extends Promise<infer T> ? T : P;
+export type CreateMetaRouteModel = Resolved<
+  ReturnType<CreateMetaRoute['model']>
+>;

app/routes/create/options-datetime.js

@@ -1,7 +0,0 @@
-import Route from '@ember/routing/route';
-
-export default class OptionsDatetimeRoute extends Route {
-  model() {
-    return this.modelFor('create');
-  }
-}

app/routes/create/options-datetime.ts

@@ -0,0 +1,13 @@
+import Route from '@ember/routing/route';
+import type { CreateRouteModel } from '../create';
+
+export default class CreateOptionsDatetimeRoute extends Route {
+  model() {
+    return this.modelFor('create') as CreateRouteModel;
+  }
+}
+
+type Resolved<P> = P extends Promise<infer T> ? T : P;
+export type CreateOptionsDatetimeRouteModel = Resolved<
+  ReturnType<CreateOptionsDatetimeRoute['model']>
+>;

app/routes/create/options.js

@@ -1,7 +0,0 @@
-import Route from '@ember/routing/route';
-
-export default class OptionsRoute extends Route {
-  model() {
-    return this.modelFor('create');
-  }
-}

app/routes/create/options.ts

@@ -0,0 +1,13 @@
+import Route from '@ember/routing/route';
+import type { CreateRouteModel } from '../create';
+
+export default class CreateOptionsRoute extends Route {
+  model() {
+    return this.modelFor('create') as CreateRouteModel;
+  }
+}
+
+type Resolved<P> = P extends Promise<infer T> ? T : P;
+export type CreateOptionsRouteModel = Resolved<
+  ReturnType<CreateOptionsRoute['model']>
+>;

app/routes/create/settings.js

@@ -1,7 +0,0 @@
-import Route from '@ember/routing/route';
-
-export default class SettingsRoute extends Route {
-  model() {
-    return this.modelFor('create');
-  }
-}

app/routes/create/settings.ts

@@ -0,0 +1,13 @@
+import Route from '@ember/routing/route';
+import type { CreateRouteModel } from '../create';
+
+export default class CreateSettingsRoute extends Route {
+  model() {
+    return this.modelFor('create') as CreateRouteModel;
+  }
+}
+
+type Resolved<P> = P extends Promise<infer T> ? T : P;
+export type CreateSettingsRouteModel = Resolved<
+  ReturnType<CreateSettingsRoute['model']>
+>;

app/routes/poll.js

@@ -1,33 +0,0 @@
-import Route from '@ember/routing/route';
-import Poll from '../models/poll';
-import { action } from '@ember/object';
-import { inject as service } from '@ember/service';
-
-export default class PollRoute extends Route {
-  @service router;
-
-  @action
-  error(error) {
-    if (error && error.status === 404) {
-      return this.router.transitionTo('404');
-    }
-
-    return true;
-  }
-
-  model({ encryptionKey, poll_id: id }) {
-    return Poll.load(id, encryptionKey);
-  }
-
-  redirect(poll, transition) {
-    if (transition.targetName === 'poll.index') {
-      const { encryptionKey } = this.paramsFor(this.routeName);
-
-      this.router.transitionTo('poll.participation', poll, {
-        queryParams: {
-          encryptionKey,
-        },
-      });
-    }
-  }
-}

app/routes/poll.ts

@@ -0,0 +1,36 @@
+import Route from '@ember/routing/route';
+import Poll from '../models/poll';
+import { inject as service } from '@ember/service';
+import type Transition from '@ember/routing/transition';
+import RouterService from '@ember/routing/router-service';
+
+export default class PollRoute extends Route {
+  @service declare router: RouterService;
+
+  model({
+    encryptionKey,
+    poll_id: id,
+  }: {
+    encryptionKey: string;
+    poll_id: string;
+  }) {
+    return Poll.load(id, encryptionKey);
+  }
+
+  redirect(poll: Poll, transition: Transition) {
+    if (transition.to.name === 'poll.index') {
+      const { encryptionKey } = this.paramsFor(this.routeName) as {
+        encryptionKey: string;
+      };
+
+      this.router.transitionTo('poll.participation', poll, {
+        queryParams: {
+          encryptionKey,
+        },
+      });
+    }
+  }
+}
+
+type Resolved<P> = P extends Promise<infer T> ? T : P;
+export type PollRouteModel = Resolved<ReturnType<PollRoute['model']>>;

app/routes/poll/participation.ts

@@ -1,7 +1,9 @@
 import Route from '@ember/routing/route';
 import { tracked } from '@glimmer/tracking';
 import { TrackedArray } from 'tracked-built-ins';
-import IntlMessage from '../../utils/intl-message';
+import IntlMessage from 'croodle/utils/intl-message';
+import type Poll from 'croodle/models/poll';
+import type Option from 'croodle/models/option';
 
 class FormDataSelections {
   @tracked value = null;
@@ -21,13 +23,13 @@ class FormDataSelections {
     return this.valueValidation === null;
   }
 
-  constructor(valueIsRequired) {
+  constructor(valueIsRequired: boolean) {
     this.valueIsRequired = valueIsRequired;
   }
 }
 
 class FormData {
-  @tracked name = null;
+  @tracked name: null | string = null;
   nameIsRequired;
   namesTaken;
   selections;
@@ -39,8 +41,7 @@ class FormData {
       return new IntlMessage('poll.error.name.valueMissing');
     }
 
-    // TODO: Validate that name is unique for this poll
-    if (namesTaken.includes(name)) {
+    if (name && namesTaken.includes(name)) {
       return new IntlMessage('poll.error.name.duplicate');
     }
 
@@ -57,7 +58,18 @@ class FormData {
     return null;
   }
 
-  constructor(options, { nameIsRequired, namesTaken, selectionIsRequired }) {
+  constructor(
+    options: Option[],
+    {
+      nameIsRequired,
+      namesTaken,
+      selectionIsRequired,
+    }: {
+      nameIsRequired: boolean;
+      namesTaken: string[];
+      selectionIsRequired: boolean;
+    },
+  ) {
     this.nameIsRequired = nameIsRequired;
     this.namesTaken = namesTaken;
     this.selections = new TrackedArray(
@@ -68,7 +80,7 @@ class FormData {
 
 export default class ParticipationRoute extends Route {
   model() {
-    const poll = this.modelFor('poll');
+    const poll = this.modelFor('poll') as Poll;
     const { anonymousUser, forceAnswer, options, users } = poll;
     const formData = new FormData(options, {
       nameIsRequired: !anonymousUser,

app/templates/404.hbs

@@ -1,6 +0,0 @@
-<div class="box">
-  <h2>poll could not be found</h2>
-  <p>
-    The poll with you url could not be found. Perhaps it got deleted?
-  </p>
-</div>

app/utils/answers-for-answer-type.ts

@@ -1,6 +1,14 @@
 import { assert } from '@ember/debug';
 
-export default function (answerType) {
+export type Answer = {
+  labelTranslation: string;
+  icon: string;
+  type: string;
+};
+
+export default function (
+  answerType: 'YesNo' | 'YesNoMaybe' | 'FreeText',
+): Answer[] {
   switch (answerType) {
     case 'YesNo':
       return [

app/utils/api.ts

@@ -10,7 +10,7 @@ const baseUrl = window.location.pathname
   // add api/index.php
   .concat('/api/index.php');
 
-function apiUrl(path) {
+function apiUrl(path: string) {
   return `${baseUrl}/${path}`;
 }
 

app/utils/encryption.ts

@@ -1,14 +1,14 @@
 import { decrypt as sjclDecrypt, encrypt as sjclEncrypt } from 'sjcl';
 
-function decrypt(encryptedValue, passphrase) {
+function decrypt(encryptedValue: string, passphrase: string): unknown {
   return JSON.parse(sjclDecrypt(passphrase, encryptedValue));
 }
 
-function encrypt(plainValue, passphrase) {
+function encrypt(plainValue: unknown, passphrase: string) {
   return sjclEncrypt(passphrase, JSON.stringify(plainValue));
 }
 
-function generatePassphrase() {
+function generatePassphrase(): string {
   const length = 40;
   const possible =
     'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
@@ -18,7 +18,9 @@ function generatePassphrase() {
 
   let passphrase = '';
   for (let j = length; j--; ) {
-    passphrase += possible.charAt(Math.floor(randomArray[j] % possible.length));
+    passphrase += possible.charAt(
+      Math.floor(randomArray[j]! % possible.length),
+    );
   }
 
   return passphrase;

app/utils/intl-message.ts

@@ -2,7 +2,7 @@ export default class IntlMessage {
   key;
   options;
 
-  constructor(key, options) {
+  constructor(key: string, options?: Record<string, string>) {
     this.key = key;
     this.options = options;
   }

config/ember-cli-update.json

@@ -11,8 +11,8 @@
           "codemodsSource": "ember-app-codemods-manifest@1",
           "isBaseBlueprint": true,
           "options": [
-            "--yarn",
-            "--no-welcome"
+            "--ci-provider=github",
+            "--typescript"
           ]
         }
       ]

config/optional-features.json

@@ -1,5 +1,6 @@
 {
   "application-template-wrapper": false,
+  "default-async-observers": true,
   "jquery-integration": false,
   "template-only-glimmer-components": true
 }

ember-cli-build.js

@@ -31,7 +31,7 @@ module.exports = function (defaults) {
       ],
     },
     'ember-cli-babel': {
-      includePolyfill: true,
+      enableTypeScriptTransform: true,
     },
     'ember-composable-helpers': {
       only: ['array', 'object-at', 'pick'],

package.json

@@ -18,8 +18,9 @@
     "lint:hbs": "ember-template-lint .",
     "lint:hbs:fix": "ember-template-lint . --fix",
     "lint:js": "eslint . --cache",
-    "release": "release-it",
     "lint:js:fix": "eslint . --fix",
+    "lint:types": "tsc --noEmit",
+    "release": "release-it",
     "start": "ember serve",
     "test": "concurrently \"npm:lint\" \"npm:test:*\" --names \"lint,test:\"",
     "test:ember": "ember test",
@@ -28,14 +29,21 @@
   },
   "devDependencies": {
     "@babel/core": "^7.22.20",
-    "@babel/eslint-parser": "^7.22.15",
-    "@babel/plugin-proposal-decorators": "^7.22.15",
     "@ember/optional-features": "^2.0.0",
     "@ember/string": "^3.1.1",
     "@ember/test-helpers": "^3.2.0",
     "@glimmer/component": "^1.1.2",
     "@glimmer/tracking": "^1.1.2",
+    "@glint/environment-ember-loose": "^1.1.0",
+    "@glint/template": "^1.1.0",
     "@release-it-plugins/lerna-changelog": "^6.0.0",
+    "@tsconfig/ember": "^3.0.1",
+    "@types/luxon": "^3.3.3",
+    "@types/qunit": "^2.19.6",
+    "@types/rsvp": "^4.0.4",
+    "@types/sjcl": "^1.0.32",
+    "@typescript-eslint/eslint-plugin": "^6.7.2",
+    "@typescript-eslint/parser": "^6.7.2",
     "bootstrap": "^4.3.1",
     "broccoli-asset-rev": "^3.0.0",
     "concurrently": "^8.2.1",
@@ -98,6 +106,7 @@
     "stylelint-config-standard-scss": "^11.0.0",
     "stylelint-prettier": "^4.0.2",
     "tracked-built-ins": "^3.3.0",
+    "typescript": "^5.2.2",
     "webpack": "^5.88.2"
   },
   "engines": {

tests/helpers/index.ts

@@ -2,13 +2,14 @@ import {
   setupApplicationTest as upstreamSetupApplicationTest,
   setupRenderingTest as upstreamSetupRenderingTest,
   setupTest as upstreamSetupTest,
+  type SetupTestOptions,
 } from 'ember-qunit';
 
 // This file exists to provide wrappers around ember-qunit's
 // test setup functions. This way, you can easily extend the setup that is
 // needed per test type.
 
-function setupApplicationTest(hooks, options) {
+function setupApplicationTest(hooks: NestedHooks, options?: SetupTestOptions) {
   upstreamSetupApplicationTest(hooks, options);
 
   // Additional setup for application tests can be done here.
@@ -27,13 +28,13 @@ function setupApplicationTest(hooks, options) {
   // setupMirage(hooks); // ember-cli-mirage
 }
 
-function setupRenderingTest(hooks, options) {
+function setupRenderingTest(hooks: NestedHooks, options?: SetupTestOptions) {
   upstreamSetupRenderingTest(hooks, options);
 
   // Additional setup for rendering tests can be done here.
 }
 
-function setupTest(hooks, options) {
+function setupTest(hooks: NestedHooks, options?: SetupTestOptions) {
   upstreamSetupTest(hooks, options);
 
   // Additional setup for unit tests can be done here.

tsconfig.json

@@ -0,0 +1,17 @@
+{
+  "extends": "@tsconfig/ember/tsconfig.json",
+  "compilerOptions": {
+    // The combination of `baseUrl` with `paths` allows Ember's classic package
+    // layout, which is not resolvable with the Node resolution algorithm, to
+    // work with TypeScript.
+    "baseUrl": ".",
+    "paths": {
+      "croodle/tests/*": ["tests/*"],
+      "croodle/*": ["app/*"],
+      "fetch": [
+        "node_modules/ember-fetch"
+      ],
+      "*": ["types/*"]
+    }
+  }
+}

types/ember-cli-flash/flash/object.d.ts

@@ -0,0 +1,19 @@
+// Source: https://github.com/adopted-ember-addons/ember-cli-flash/blob/5e9ca769ce30b168eef1a4a8e4cdf5ad0d538a8d/ember-cli-flash/declarations/flash/object.d.ts
+declare module 'ember-cli-flash/flash/object' {
+  import EmberObject from '@ember/object';
+  import Evented from '@ember/object/evented';
+
+  class FlashObject extends EmberObject.extend(Evented) {
+    exiting: boolean;
+    exitTimer: number;
+    isExitable: boolean;
+    initializedTime: number;
+    destroyMessage(): void;
+    exitMessage(): void;
+    preventExit(): void;
+    allowExit(): void;
+    timerTask(): void;
+    exitTimerTask(): void;
+  }
+  export default FlashObject;
+}

types/ember-cli-flash/services/intl.d.ts

@@ -0,0 +1,46 @@
+// Source: https://github.com/adopted-ember-addons/ember-cli-flash/blob/5e9ca769ce30b168eef1a4a8e4cdf5ad0d538a8d/ember-cli-flash/declarations/services/flash-messages.d.ts
+declare module 'ember-cli-flash/services/flash-messages' {
+  import Service from '@ember/service';
+  import FlashObject from 'ember-cli-flash/flash/object';
+
+  export interface MessageOptions {
+    type: string;
+    priority: number;
+    timeout: number;
+    sticky: boolean;
+    showProgress: boolean;
+    extendedTimeout: number;
+    destroyOnClick: boolean;
+    onDestroy: () => void;
+    [key: string]: unknown;
+  }
+
+  export interface CustomMessageInfo extends Partial<MessageOptions> {
+    message: string;
+  }
+
+  export interface FlashFunction {
+    (message: string, options?: Partial<MessageOptions>): FlashMessageService;
+  }
+
+  class FlashMessageService extends Service {
+    queue: FlashObject[];
+    readonly arrangedQueue: FlashObject[];
+    readonly isEmpty: boolean;
+    success: FlashFunction;
+    warning: FlashFunction;
+    info: FlashFunction;
+    danger: FlashFunction;
+    alert: FlashFunction;
+    secondary: FlashFunction;
+    add(messageInfo: CustomMessageInfo): this;
+    clearMessages(): this;
+    registerTypes(types: string[]): this;
+    getFlashObject(): FlashObject;
+    peekFirst(): FlashObject | undefined;
+    peekLast(): FlashObject | undefined;
+    readonly flashMessageDefaults: unknown;
+  }
+
+  export default FlashMessageService;
+}

types/ember-power-calendar/services/power-calendar.d.ts

@@ -0,0 +1,7 @@
+import type Service from '@ember/service';
+
+declare module 'ember-power-calendar/services/power-calendar' {
+  export default class PowerCalendarService extends Service {
+    locale: string;
+  }
+}

types/global.d.ts

@@ -0,0 +1 @@
+import '@glint/environment-ember-loose';