feat: добавил поддержку подписки на календарь и экспорт расписания лекций в формате .ics

frontend/src/api/client.ts

@@ -81,3 +81,30 @@ export function extractItems<T>(payload: T[] | { items?: T[] } | undefined): T[]
   if (Array.isArray(payload)) return payload
   return payload?.items ?? []
 }
+
+
+export async function apiRequestBlob(
+  path: string,
+  options: RequestInit & { query?: Record<string, unknown> } = {},
+): Promise<Blob> {
+  const headers = new Headers(options.headers)
+  if (!headers.has('Accept')) headers.set('Accept', 'text/calendar')
+  if (accessToken) headers.set('Authorization', `Bearer ${accessToken}`)
+
+  const response = await fetch(makeUrl(path, options.query), {
+    ...options,
+    headers,
+    credentials: 'include',
+  })
+
+  if (!response.ok) {
+    const body = await parseResponse(response)
+    const message =
+      typeof body === 'object' && body && 'message' in body
+        ? String((body as { message: unknown }).message)
+        : `API request failed with status ${response.status}`
+    throw new ApiError(message, response.status, body)
+  }
+
+  return response.blob()
+}

frontend/src/api/index.ts

@@ -1,4 +1,4 @@
-import { apiRequest, extractItems } from './client'
+import { apiRequest, apiRequestBlob, extractItems } from './client'
 import type {
   AchievementDto,
   AuthResponse,
@@ -19,6 +19,7 @@ import type {
   UpdateReviewPromptRequest,
   UserAchievementDto,
   AdminDashboardStatsDto,
+  CalendarSubscriptionDto,
   CurrentUserDto,
   UserDto,
   UserQuery,
@@ -76,6 +77,11 @@ export const usersApi = {
     )
     return extractItems(payload)
   },
+  downloadMyEnrollmentsIcs: () => apiRequestBlob('/users/me/enrollments.ics'),
+  downloadEnrollmentIcs: (lectureId: string | number) =>
+    apiRequestBlob(`/users/me/enrollments/${lectureId}.ics`),
+  getCalendarSubscription: () =>
+    apiRequest<CalendarSubscriptionDto>('/users/me/enrollments/calendar-subscription'),
   async myAchievements() {
     const payload = await apiRequest<
       PagedResult<UserAchievementDto> | UserAchievementDto[] | AchievementDto[]

frontend/src/api/types.ts

@@ -83,6 +83,10 @@ export interface AdminDashboardStatsDto {
   pendingReviewsCount: number
 }
 
+export interface CalendarSubscriptionDto {
+  feedUrl: string
+}
+
 export interface EnrollmentSlotRuleDto {
   level: number
   slots: number

frontend/src/utils/downloadFile.ts

@@ -0,0 +1,10 @@
+export function downloadFile(blob: Blob, fileName: string) {
+  const url = URL.createObjectURL(blob)
+  const link = document.createElement('a')
+  link.href = url
+  link.download = fileName
+  document.body.appendChild(link)
+  link.click()
+  link.remove()
+  URL.revokeObjectURL(url)
+}

frontend/src/views/student/DashboardView.vue

@@ -2,6 +2,8 @@
 import { computed, inject, onMounted, ref } from 'vue'
 import { useRouter } from 'vue-router'
 import { useAuthStore } from '@/stores/auth'
+import { usersApi } from '@/api'
+import { downloadFile } from '@/utils/downloadFile'
 import { useLecturesStore } from '@/stores/lectures'
 import { useUserStore } from '@/stores/user'
 import GlassCard from '@/components/ui/GlassCard.vue'
@@ -66,6 +68,16 @@ const levelProgressText = computed(() =>
     : `${userXp.value} XP`,
 )
 
+async function downloadLectureIcs(id: string) {
+  try {
+    const blob = await usersApi.downloadEnrollmentIcs(id)
+    downloadFile(blob, `lecture-${id}.ics`)
+    addToast?.("Файл календаря скачан", "success")
+  } catch (err) {
+    addToast?.(err instanceof Error ? err.message : "Не удалось скачать .ics", "error")
+  }
+}
+
 onMounted(async () => {
   await Promise.all([
     lectures.all.length ? Promise.resolve() : lectures.fetchLectures(),
@@ -125,7 +137,7 @@ async function registerLecture(id: string) {
           <button class="btn-primary" @click="router.push(`/lecture/${nextLecture.id}`)">
             Открыть
           </button>
-          <button class="btn-secondary">Добавить в календарь</button>
+          <button class="btn-secondary" @click="downloadLectureIcs(nextLecture.id)">Скачать .ics</button>
         </div>
       </div>
     </GlassCard>

frontend/src/views/student/LectureDetailView.vue

@@ -1,6 +1,8 @@
 <script setup lang="ts">
 import { computed, inject, onMounted, ref } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
+import { usersApi } from '@/api'
+import { downloadFile } from '@/utils/downloadFile'
 import { useLecturesStore } from '@/stores/lectures'
 import { useUserStore } from '@/stores/user'
 import GlassCard from '@/components/ui/GlassCard.vue'
@@ -37,6 +39,16 @@ onMounted(async () => {
   await lecturesStore.fetchLecture(lectureId.value)
 })
 
+async function downloadLectureIcs(id: string) {
+  try {
+    const blob = await usersApi.downloadEnrollmentIcs(id)
+    downloadFile(blob, `lecture-${id}.ics`)
+    addToast?.("Файл календаря скачан", "success")
+  } catch (err) {
+    addToast?.(err instanceof Error ? err.message : "Не удалось скачать .ics", "error")
+  }
+}
+
 async function registerLecture() {
   if (!lecture.value) return
   if (slotRegistrationDisabled.value) {
@@ -90,7 +102,7 @@ async function registerLecture() {
         <button v-else class="btn-secondary" @click="lecturesStore.unregister(lecture.id)">
           Отменить запись
         </button>
-        <button class="btn-secondary">Добавить в календарь</button>
+        <button class="btn-secondary" @click="downloadLectureIcs(lecture.id)">Скачать .ics</button>
         <button v-if="isAttended" class="btn-primary" @click="router.push(`/review/${lecture.id}`)">
           Оставить отзыв
         </button>

frontend/src/views/student/MyLecturesView.vue

@@ -1,6 +1,8 @@
 <script setup lang="ts">
-import { computed, onMounted, ref } from 'vue'
+import { computed, inject, onMounted, ref } from 'vue'
 import { useRouter } from 'vue-router'
+import { usersApi } from '@/api'
+import { downloadFile } from '@/utils/downloadFile'
 import { useLecturesStore } from '@/stores/lectures'
 import { useAuthStore } from '@/stores/auth'
 import GlassCard from '@/components/ui/GlassCard.vue'
@@ -14,6 +16,11 @@ const router = useRouter()
 const activeTab = ref<'upcoming' | 'history'>('upcoming')
 const cancelModal = ref(false)
 const selectedId = ref<string | null>(null)
+const calendarSubscriptionUrl = ref<string | null>(null)
+const calendarActionPending = ref(false)
+const addToast = inject('addToast') as
+  | ((message: string, type?: 'success' | 'error' | 'info') => void)
+  | undefined
 
 const upcoming = computed(() =>
   lecturesStore.registeredLectures.map((l) => ({ ...l, status: 'registered' })),
@@ -26,6 +33,98 @@ onMounted(async () => {
   if (auth.user) await lecturesStore.fetchRegisteredForCurrentUser()
 })
 
+async function downloadLectureIcs(id: string) {
+  try {
+    const blob = await usersApi.downloadEnrollmentIcs(id)
+    downloadFile(blob, `lecture-${id}.ics`)
+  } catch (err) {
+    addToast?.(err instanceof Error ? err.message : 'Не удалось скачать .ics', 'error')
+  }
+}
+
+async function downloadAllIcs() {
+  try {
+    const blob = await usersApi.downloadMyEnrollmentsIcs()
+    downloadFile(blob, 'my-lectures.ics')
+  } catch (err) {
+    addToast?.(err instanceof Error ? err.message : 'Не удалось скачать .ics', 'error')
+  }
+}
+
+async function getCalendarSubscriptionUrl() {
+  if (calendarSubscriptionUrl.value) return calendarSubscriptionUrl.value
+  const subscription = await usersApi.getCalendarSubscription()
+  calendarSubscriptionUrl.value = subscription.feedUrl
+  return subscription.feedUrl
+}
+
+async function copyText(value: string) {
+  if (navigator.clipboard?.writeText) {
+    try {
+      await navigator.clipboard.writeText(value)
+      return true
+    } catch {
+      // Browser may block async clipboard writes after awaiting the subscription request.
+    }
+  }
+
+  const textarea = document.createElement('textarea')
+  textarea.value = value
+  textarea.style.position = 'fixed'
+  textarea.style.left = '-9999px'
+  document.body.appendChild(textarea)
+  textarea.focus()
+  textarea.select()
+  const copied = document.execCommand('copy')
+  textarea.remove()
+  return copied
+}
+
+async function copyCalendarSubscriptionUrl() {
+  try {
+    calendarActionPending.value = true
+    const feedUrl = await getCalendarSubscriptionUrl()
+    if (!await copyText(feedUrl)) throw new Error('Браузер заблокировал копирование ссылки')
+    addToast?.('ICS-ссылка скопирована', 'success')
+  } catch (err) {
+    addToast?.(err instanceof Error ? err.message : 'Не удалось скопировать ссылку', 'error')
+  } finally {
+    calendarActionPending.value = false
+  }
+}
+
+async function syncWithGoogleCalendar() {
+  const googleWindow = window.open('about:blank', '_blank')
+
+  try {
+    calendarActionPending.value = true
+    const feedUrl = await getCalendarSubscriptionUrl()
+    const copied = await copyText(feedUrl)
+
+    const googleUrl = `https://calendar.google.com/calendar/r?cid=${encodeURIComponent(feedUrl)}`
+    if (googleWindow) {
+      googleWindow.opener = null
+      googleWindow.location.href = googleUrl
+    } else {
+      window.open(googleUrl, '_blank', 'noopener,noreferrer')
+    }
+    addToast?.(
+      copied
+        ? 'ICS-ссылка скопирована. Google Calendar открыт в новой вкладке.'
+        : 'Google Calendar открыт. Если ссылка не подставилась, скопируйте ICS-ссылку отдельно.',
+      copied ? 'success' : 'info',
+    )
+  } catch (err) {
+    googleWindow?.close()
+    addToast?.(
+      err instanceof Error ? err.message : 'Не удалось подготовить ссылку для Google Calendar',
+      'error',
+    )
+  } finally {
+    calendarActionPending.value = false
+  }
+}
+
 function openCancel(id: string) {
   selectedId.value = id
   cancelModal.value = true
@@ -46,7 +145,25 @@ async function confirmCancel() {
           Управляйте регистрациями, экспортируйте расписание и оставляйте отзывы.
         </p>
       </div>
-      <button class="btn-secondary">Экспорт в календарь</button>
+      <div class="calendar-actions">
+        <button
+          class="btn-primary"
+          :disabled="calendarActionPending"
+          @click="syncWithGoogleCalendar"
+        >
+          Синхронизировать с Google Calendar
+        </button>
+        <button
+          class="btn-secondary"
+          :disabled="calendarActionPending"
+          @click="copyCalendarSubscriptionUrl"
+        >
+          Скопировать ICS-ссылку
+        </button>
+        <button class="btn-secondary" @click="downloadAllIcs">
+          Скачать все мои лекции (.ics)
+        </button>
+      </div>
     </div>
 
     <div class="tabs">
@@ -76,7 +193,7 @@ async function confirmCancel() {
         </div>
         <div class="lecture-actions">
           <StatusBadge status="registered" />
-          <button class="btn-secondary btn-sm">Добавить в календарь</button>
+          <button class="btn-secondary btn-sm" @click="downloadLectureIcs(item.id)">Скачать .ics</button>
           <button class="btn-danger btn-sm" @click="openCancel(item.id)">Отменить</button>
         </div>
       </GlassCard>
@@ -133,6 +250,13 @@ async function confirmCancel() {
   gap: 12px;
   flex-wrap: wrap;
 }
+.calendar-actions {
+  display: flex;
+  align-items: center;
+  justify-content: flex-end;
+  gap: 8px;
+  flex-wrap: wrap;
+}
 .tabs {
   display: inline-flex;
   width: fit-content;