ui: no more empty lines in schedule

.gitea/workflows/release.yml

@@ -85,6 +85,9 @@ jobs:
       - name: Build release APK
         run: ./gradlew assembleRelease
         env:
+          # Версия приложения — дата, сгенерированная на предыдущем шаге.
+          # Читается в app/build.gradle.kts как versionName (для BuildConfig).
+          APP_VERSION: ${{ steps.version.outputs.version_name }}
           # Переменные окружения, которые читает signingConfig в app/build.gradle.kts
           ANDROID_KEYSTORE_PATH: ${{ github.workspace }}/keystore.jks
           ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
@@ -112,9 +115,3 @@ jobs:
           files: ${{ steps.apk.outputs.apk_path }}
           token: ${{ secrets.GITEA_TOKEN }}
           server_url: ${{ gitea.server_url }}
-
-      - name: Upload APK as artifact
-        uses: actions/upload-artifact@v4
-        with:
-          name: vyatsu-schedule-${{ steps.version.outputs.version_name }}
-          path: ${{ steps.apk.outputs.apk_path }}

app/build.gradle.kts

@@ -17,7 +17,9 @@ android {
         minSdk = 28
         targetSdk = 36
         versionCode = 1
-        versionName = "1.0"
+        // В продакшн-сборке версию приложения подставляет CI (env APP_VERSION = дата ГГГГ.ММ.ДД).
+        // Локально и при отсутствии переменной — fallback "1.0".
+        versionName = System.getenv("APP_VERSION") ?: "1.0"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -65,6 +67,10 @@ android {
     }
 }
 
+ksp {
+    arg("room.schemaLocation", "$projectDir/schemas")
+}
+
 dependencies {
     implementation(libs.androidx.core.ktx)
     implementation(libs.androidx.lifecycle.runtime.ktx)

app/schemas/agzam.vyatsu.data.local.AppDatabase/2.json

@@ -0,0 +1,381 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 2,
+    "identityHash": "48411ce0f1f22ef1dccd5852a9e97c5d",
+    "entities": [
+      {
+        "tableName": "groups",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` TEXT NOT NULL, `name` TEXT NOT NULL, `faculty` TEXT NOT NULL, `autumnFirst` INTEGER, `autumnSecond` INTEGER, `springFirst` INTEGER, `springSecond` INTEGER, `lastSyncedAt` INTEGER NOT NULL, PRIMARY KEY(`id`))",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "faculty",
+            "columnName": "faculty",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "autumnFirst",
+            "columnName": "autumnFirst",
+            "affinity": "INTEGER"
+          },
+          {
+            "fieldPath": "autumnSecond",
+            "columnName": "autumnSecond",
+            "affinity": "INTEGER"
+          },
+          {
+            "fieldPath": "springFirst",
+            "columnName": "springFirst",
+            "affinity": "INTEGER"
+          },
+          {
+            "fieldPath": "springSecond",
+            "columnName": "springSecond",
+            "affinity": "INTEGER"
+          },
+          {
+            "fieldPath": "lastSyncedAt",
+            "columnName": "lastSyncedAt",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "id"
+          ]
+        }
+      },
+      {
+        "tableName": "schedules",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `groupId` TEXT NOT NULL, `season` TEXT NOT NULL, `weekStart` INTEGER NOT NULL, `weekEnd` INTEGER NOT NULL, `lastSyncedAt` INTEGER NOT NULL, FOREIGN KEY(`groupId`) REFERENCES `groups`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "groupId",
+            "columnName": "groupId",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "season",
+            "columnName": "season",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekStart",
+            "columnName": "weekStart",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weekEnd",
+            "columnName": "weekEnd",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastSyncedAt",
+            "columnName": "lastSyncedAt",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_schedules_groupId",
+            "unique": false,
+            "columnNames": [
+              "groupId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_schedules_groupId` ON `${TABLE_NAME}` (`groupId`)"
+          },
+          {
+            "name": "index_schedules_groupId_season_weekStart",
+            "unique": true,
+            "columnNames": [
+              "groupId",
+              "season",
+              "weekStart"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_schedules_groupId_season_weekStart` ON `${TABLE_NAME}` (`groupId`, `season`, `weekStart`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "groups",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "groupId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "days",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `scheduleId` INTEGER NOT NULL, `date` INTEGER NOT NULL, FOREIGN KEY(`scheduleId`) REFERENCES `schedules`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "scheduleId",
+            "columnName": "scheduleId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_days_scheduleId",
+            "unique": false,
+            "columnNames": [
+              "scheduleId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_days_scheduleId` ON `${TABLE_NAME}` (`scheduleId`)"
+          },
+          {
+            "name": "index_days_date",
+            "unique": false,
+            "columnNames": [
+              "date"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_days_date` ON `${TABLE_NAME}` (`date`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "schedules",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "scheduleId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "lessons",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `dayId` INTEGER NOT NULL, `date` INTEGER NOT NULL, `slotIndex` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `lessonIndex` INTEGER NOT NULL, `raw` TEXT NOT NULL, `room` TEXT, `groupName` TEXT, `subgroup` TEXT, `subject` TEXT, `type` TEXT NOT NULL, `teacher` TEXT, FOREIGN KEY(`dayId`) REFERENCES `days`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "dayId",
+            "columnName": "dayId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "slotIndex",
+            "columnName": "slotIndex",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lessonIndex",
+            "columnName": "lessonIndex",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "raw",
+            "columnName": "raw",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "room",
+            "columnName": "room",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "groupName",
+            "columnName": "groupName",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "subgroup",
+            "columnName": "subgroup",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT"
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT"
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_lessons_dayId",
+            "unique": false,
+            "columnNames": [
+              "dayId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_dayId` ON `${TABLE_NAME}` (`dayId`)"
+          },
+          {
+            "name": "index_lessons_date",
+            "unique": false,
+            "columnNames": [
+              "date"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_date` ON `${TABLE_NAME}` (`date`)"
+          },
+          {
+            "name": "index_lessons_subject",
+            "unique": false,
+            "columnNames": [
+              "subject"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_subject` ON `${TABLE_NAME}` (`subject`)"
+          },
+          {
+            "name": "index_lessons_room",
+            "unique": false,
+            "columnNames": [
+              "room"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_lessons_room` ON `${TABLE_NAME}` (`room`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "days",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "dayId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "preferences",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`key` TEXT NOT NULL, `value` TEXT NOT NULL, PRIMARY KEY(`key`))",
+        "fields": [
+          {
+            "fieldPath": "key",
+            "columnName": "key",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "value",
+            "columnName": "value",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "key"
+          ]
+        }
+      }
+    ],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '48411ce0f1f22ef1dccd5852a9e97c5d')"
+    ]
+  }
+}

app/src/main/java/agzam/vyatsu/AppRoot.kt

@@ -41,5 +41,5 @@ private class SimpleFactory<T : ViewModel>(private val create: () -> T) : ViewMo
     override fun <T : ViewModel> create(modelClass: Class<T>): T = create() as T
 }
 
-private fun scheduleFactory(c: AppContainer): ViewModelProvider.Factory = SimpleFactory { ScheduleViewModel(c.scheduleRepository, c.preferencesRepository) }
+private fun scheduleFactory(c: AppContainer): ViewModelProvider.Factory = SimpleFactory { ScheduleViewModel(c.scheduleRepository, c.preferencesRepository, c.groupRepository) }
 private fun groupPickerFactory(c: AppContainer): ViewModelProvider.Factory = SimpleFactory { GroupPickerViewModel(c.groupRepository) }

app/src/main/java/agzam/vyatsu/data/local/AppDatabase.kt

@@ -2,16 +2,20 @@ package agzam.vyatsu.data.local
 
 import androidx.room.Database
 import androidx.room.RoomDatabase
+import androidx.room.TypeConverters
 
 @Database(
     entities = [
         GroupEntity::class,
         ScheduleEntity::class,
+        DayEntity::class,
+        LessonEntity::class,
         PreferenceEntity::class
     ],
-    version = 1,
-    exportSchema = false
+    version = 2,
+    exportSchema = true
 )
+@TypeConverters(Converters::class)
 abstract class AppDatabase : RoomDatabase() {
     abstract fun groupDao(): GroupDao
     abstract fun scheduleDao(): ScheduleDao

app/src/main/java/agzam/vyatsu/data/local/Converters.kt

@@ -0,0 +1,29 @@
+package agzam.vyatsu.data.local
+
+import agzam.vyatsu.domain.model.LessonType
+import androidx.room.TypeConverter
+import java.time.LocalDate
+import java.time.LocalTime
+
+class Converters {
+
+    @TypeConverter
+    fun localDateToEpochDay(date: LocalDate?): Long? = date?.toEpochDay()
+
+    @TypeConverter
+    fun epochDayToLocalDate(epochDay: Long?): LocalDate? = epochDay?.let(LocalDate::ofEpochDay)
+
+    @TypeConverter
+    fun localTimeToMinutes(time: LocalTime?): Int? = time?.let { it.hour * 60 + it.minute }
+
+    @TypeConverter
+    fun minutesToLocalTime(minutes: Int?): LocalTime? =
+        minutes?.let { LocalTime.of(it / 60, it % 60) }
+
+    @TypeConverter
+    fun lessonTypeToString(type: LessonType): String = type.name
+
+    @TypeConverter
+    fun stringToLessonType(value: String): LessonType =
+        runCatching { LessonType.valueOf(value) }.getOrDefault(LessonType.OTHER)
+}

app/src/main/java/agzam/vyatsu/data/local/DayDto.kt

@@ -1,23 +0,0 @@
-package agzam.vyatsu.data.local
-
-import agzam.vyatsu.domain.model.Day
-import com.squareup.moshi.JsonClass
-import java.time.LocalDate
-
-@JsonClass(generateAdapter = true)
-data class DayDto(
-    val date: String,
-    val slots: List<SlotDto> = emptyList()
-) {
-    fun toDomain(): Day = Day(
-        date = LocalDate.parse(date),
-        intervals = slots.map { it.toDomain() }
-    )
-
-    companion object {
-        fun fromDomain(d: Day): DayDto = DayDto(
-            date = d.date.toString(),
-            slots = d.intervals.map { SlotDto.fromDomain(it) }
-        )
-    }
-}

app/src/main/java/agzam/vyatsu/data/local/DayEntity.kt

@@ -0,0 +1,27 @@
+package agzam.vyatsu.data.local
+
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+import androidx.room.PrimaryKey
+
+@Entity(
+    tableName = "days",
+    foreignKeys = [
+        ForeignKey(
+            entity = ScheduleEntity::class,
+            parentColumns = ["id"],
+            childColumns = ["scheduleId"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ],
+    indices = [
+        Index("scheduleId"),
+        Index("date")
+    ]
+)
+data class DayEntity(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val scheduleId: Long,
+    val date: Long
+)

app/src/main/java/agzam/vyatsu/data/local/GroupEntity.kt

@@ -8,9 +8,9 @@ data class GroupEntity(
     @PrimaryKey val id: String,
     val name: String,
     val faculty: String,
-    val autumnFirst: String,
-    val autumnSecond: String,
-    val springFirst: String,
-    val springSecond: String,
+    val autumnFirst: Long?,
+    val autumnSecond: Long?,
+    val springFirst: Long?,
+    val springSecond: Long?,
     val lastSyncedAt: Long
 )

app/src/main/java/agzam/vyatsu/data/local/LessonDto.kt

@@ -1,38 +0,0 @@
-package agzam.vyatsu.data.local
-
-import agzam.vyatsu.domain.model.Lesson
-import agzam.vyatsu.domain.model.LessonType
-import com.squareup.moshi.JsonClass
-
-@JsonClass(generateAdapter = true)
-data class LessonDto(
-    val raw: String = "",
-    val room: String? = null,
-    val group: String? = null,
-    val subgroup: String? = null,
-    val subject: String? = null,
-    val type: String = "",
-    val teacher: String? = null
-) {
-    fun toDomain(): Lesson = Lesson(
-        raw = raw,
-        room = room?.takeIf { it.isNotBlank() },
-        group = group?.takeIf { it.isNotBlank() },
-        subgroup = subgroup?.takeIf { it.isNotBlank() },
-        subject = subject?.takeIf { it.isNotBlank() },
-        type = runCatching { LessonType.valueOf(type) }.getOrDefault(LessonType.OTHER),
-        teacher = teacher?.takeIf { it.isNotBlank() }
-    )
-
-    companion object {
-        fun fromDomain(l: Lesson): LessonDto = LessonDto(
-            raw = l.raw,
-            room = l.room,
-            group = l.group,
-            subgroup = l.subgroup,
-            subject = l.subject,
-            type = l.type.name,
-            teacher = l.teacher
-        )
-    }
-}

app/src/main/java/agzam/vyatsu/data/local/LessonEntity.kt

@@ -0,0 +1,41 @@
+package agzam.vyatsu.data.local
+
+import agzam.vyatsu.domain.model.LessonType
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+import androidx.room.PrimaryKey
+
+@Entity(
+    tableName = "lessons",
+    foreignKeys = [
+        ForeignKey(
+            entity = DayEntity::class,
+            parentColumns = ["id"],
+            childColumns = ["dayId"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ],
+    indices = [
+        Index("dayId"),
+        Index("date"),
+        Index("subject"),
+        Index("room")
+    ]
+)
+data class LessonEntity(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val dayId: Long,
+    val date: Long,
+    val slotIndex: Int,
+    val start: Int,
+    val end: Int,
+    val lessonIndex: Int,
+    val raw: String,
+    val room: String?,
+    val groupName: String?,
+    val subgroup: String?,
+    val subject: String?,
+    val type: LessonType,
+    val teacher: String?
+)

app/src/main/java/agzam/vyatsu/data/local/PreferencesDao.kt

@@ -15,4 +15,16 @@ interface PreferencesDao {
 
     @Query("DELETE FROM preferences WHERE key = 'selectedGroupId'")
     suspend fun clearSelectedGroup()
+
+    @Query("SELECT value FROM preferences WHERE key = 'selectedWeekStart'")
+    suspend fun selectedWeekStart(): String?
+
+    @Query("INSERT OR REPLACE INTO preferences(key, value) VALUES('selectedWeekStart', :weekStart)")
+    suspend fun setSelectedWeekStart(weekStart: String)
+
+    @Query("SELECT value FROM preferences WHERE key = 'selectedDayDate'")
+    suspend fun selectedDayDate(): String?
+
+    @Query("INSERT OR REPLACE INTO preferences(key, value) VALUES('selectedDayDate', :date)")
+    suspend fun setSelectedDayDate(date: String)
 }

app/src/main/java/agzam/vyatsu/data/local/ScheduleCodec.kt

@@ -1,25 +0,0 @@
-package agzam.vyatsu.data.local
-
-import agzam.vyatsu.domain.model.Day
-import com.squareup.moshi.Moshi
-import com.squareup.moshi.Types
-
-class ScheduleCodec(moshi: Moshi) {
-    private val type: java.lang.reflect.Type =
-        Types.newParameterizedType(List::class.java, DayDto::class.java)
-    private val adapter = moshi.adapter<List<DayDto>>(type)
-
-    fun toJson(days: List<Day>): String {
-        val dto = days.map { DayDto.fromDomain(it) }
-        return adapter.toJson(dto)
-    }
-
-    fun fromJson(json: String): List<Day> {
-        return try {
-            val dto = adapter.fromJson(json) ?: return emptyList()
-            dto.map { it.toDomain() }
-        } catch (t: Throwable) {
-            emptyList()
-        }
-    }
-}

app/src/main/java/agzam/vyatsu/data/local/ScheduleDao.kt

@@ -8,15 +8,68 @@ import kotlinx.coroutines.flow.Flow
 
 @Dao
 interface ScheduleDao {
-    @Query("SELECT * FROM schedules WHERE groupId = :groupId")
-    fun observe(groupId: String): Flow<ScheduleEntity?>
 
-    @Query("SELECT * FROM schedules WHERE groupId = :groupId")
-    suspend fun get(groupId: String): ScheduleEntity?
+    @Query("SELECT * FROM schedules WHERE groupId = :groupId ORDER BY weekStart DESC")
+    fun observeSchedules(groupId: String): Flow<List<ScheduleEntity>>
 
-    @Insert(onConflict = OnConflictStrategy.REPLACE)
-    suspend fun upsert(entity: ScheduleEntity)
+    @Query("SELECT * FROM schedules WHERE groupId = :groupId ORDER BY weekStart DESC")
+    suspend fun getSchedules(groupId: String): List<ScheduleEntity>
+
+    @Query("DELETE FROM days WHERE scheduleId = :scheduleId")
+    suspend fun deleteDaysForSchedule(scheduleId: Long)
+
+    @Insert(onConflict = OnConflictStrategy.ABORT)
+    suspend fun insertSchedule(schedule: ScheduleEntity): Long
+
+    @Query("DELETE FROM schedules WHERE groupId = :groupId AND season = :season AND weekStart = :weekStart")
+    suspend fun deleteSchedule(groupId: String, season: String, weekStart: Long)
 
     @Query("DELETE FROM schedules WHERE groupId = :groupId")
-    suspend fun delete(groupId: String)
+    suspend fun deleteAll(groupId: String)
+
+    @Query(
+        """
+        DELETE FROM schedules
+        WHERE groupId = :groupId
+          AND id NOT IN (
+              SELECT id FROM schedules
+              WHERE groupId = :groupId
+              ORDER BY weekStart DESC
+              LIMIT :keep
+          )
+        """
+    )
+    suspend fun trim(groupId: String, keep: Int)
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertDays(days: List<DayEntity>): List<Long>
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertLessons(lessons: List<LessonEntity>)
+
+    @Query(
+        "SELECT days.* FROM days INNER JOIN schedules ON schedules.id = days.scheduleId " +
+            "WHERE schedules.groupId = :groupId ORDER BY days.date"
+    )
+    suspend fun getDaysForGroup(groupId: String): List<DayEntity>
+
+    @Query(
+        "SELECT lessons.* FROM lessons INNER JOIN days ON days.id = lessons.dayId " +
+            "INNER JOIN schedules ON schedules.id = days.scheduleId " +
+            "WHERE schedules.groupId = :groupId ORDER BY lessons.date, lessons.slotIndex, lessons.lessonIndex"
+    )
+    suspend fun getLessonsForGroup(groupId: String): List<LessonEntity>
+
+    @Query(
+        "SELECT days.* FROM days INNER JOIN schedules ON schedules.id = days.scheduleId " +
+            "WHERE schedules.groupId = :groupId ORDER BY days.date"
+    )
+    fun observeDaysForGroup(groupId: String): Flow<List<DayEntity>>
+
+    @Query(
+        "SELECT lessons.* FROM lessons INNER JOIN days ON days.id = lessons.dayId " +
+            "INNER JOIN schedules ON schedules.id = days.scheduleId " +
+            "WHERE schedules.groupId = :groupId ORDER BY lessons.date, lessons.slotIndex, lessons.lessonIndex"
+    )
+    fun observeLessonsForGroup(groupId: String): Flow<List<LessonEntity>>
 }

app/src/main/java/agzam/vyatsu/data/local/ScheduleEntity.kt

@@ -1,14 +1,31 @@
 package agzam.vyatsu.data.local
 
+import agzam.vyatsu.domain.model.Season
 import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
 import androidx.room.PrimaryKey
 
-@Entity(tableName = "schedules")
+@Entity(
+    tableName = "schedules",
+    foreignKeys = [
+        ForeignKey(
+            entity = GroupEntity::class,
+            parentColumns = ["id"],
+            childColumns = ["groupId"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ],
+    indices = [
+        Index("groupId"),
+        Index(value = ["groupId", "season", "weekStart"], unique = true)
+    ]
+)
 data class ScheduleEntity(
-    @PrimaryKey val groupId: String,
-    val season: String,
-    val dateRangeFirst: String,
-    val dateRangeSecond: String,
-    val weeksJson: String,
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val groupId: String,
+    val season: Season,
+    val weekStart: Long,
+    val weekEnd: Long,
     val lastSyncedAt: Long
 )

app/src/main/java/agzam/vyatsu/data/local/SlotDto.kt

@@ -1,26 +0,0 @@
-package agzam.vyatsu.data.local
-
-import agzam.vyatsu.domain.model.TimeSlot
-import com.squareup.moshi.JsonClass
-import java.time.LocalTime
-
-@JsonClass(generateAdapter = true)
-data class SlotDto(
-    val start: String,
-    val end: String,
-    val lessons: List<LessonDto> = emptyList()
-) {
-    fun toDomain(): TimeSlot = TimeSlot(
-        start = LocalTime.parse(start),
-        end = LocalTime.parse(end),
-        lessons = lessons.map { it.toDomain() }
-    )
-
-    companion object {
-        fun fromDomain(s: TimeSlot): SlotDto = SlotDto(
-            start = s.start.toString(),
-            end = s.end.toString(),
-            lessons = s.lessons.map { LessonDto.fromDomain(it) }
-        )
-    }
-}

app/src/main/java/agzam/vyatsu/data/remote/pdf/Pdf2Table.kt

@@ -38,7 +38,7 @@ class Pdf2Table(page: PDPage) : PDFGraphicsStreamEngine(page) {
 
     private val svgBuilder = StringBuilder()
     private val currentPath = StringBuilder()
-    private val tableSvg = StringBuilder()
+    val tableSvg = StringBuilder()
 
 
     private val currentSubPathLines = mutableListOf<PdfLine>()
@@ -52,7 +52,7 @@ class Pdf2Table(page: PDPage) : PDFGraphicsStreamEngine(page) {
         val width = mediaBox.width
         val height = mediaBox.height
         return """
-            <svg width="$width" height="$height" viewBox="0 0 $width $height" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+            <svg width="$width" height="$height" viewBox="0 0 $width $height" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" style='font-size: 50%;'>
                 <g>${svgBuilder}</g>
                 <g>${tableSvg}</g>
             </svg>
@@ -211,7 +211,7 @@ class Pdf2Table(page: PDPage) : PDFGraphicsStreamEngine(page) {
                 val bottom = ys[ii+1]
                 cells.add(TableCell(left, top, right-left, bottom-top))
 
-                tableSvg.append("<rect fill='${if (i % 2 == 0) "#f" else "#0"}${if (ii % 2 == 0) "f0" else "00"}' x='$left' y='$top' width='${right-left}' height='${bottom-top}'/>\n")
+                tableSvg.append("<rect fill='${if (i % 2 == 0) "#ff" else "#9e"}${if (ii % 2 == 0) "ff9e" else "9e9e"}' x='$left' y='$top' width='${right-left}' height='${bottom-top}'/>\n")
             }
             columns.add(TableColumn(left, right-left, cells))
         }

app/src/main/java/agzam/vyatsu/data/remote/pdf/PdfScheduleParser.kt

@@ -2,6 +2,7 @@ package agzam.vyatsu.data.remote.pdf
 
 import agzam.vyatsu.domain.model.Day
 import agzam.vyatsu.domain.model.Lesson
+import agzam.vyatsu.domain.model.LessonType
 import agzam.vyatsu.domain.model.TimeSlot
 import android.util.Log
 import com.tom_roush.pdfbox.pdmodel.PDDocument
@@ -25,6 +26,10 @@ object PdfScheduleParser {
     private fun timeFrom(timeString: String?): LocalTime? { return runCatching { LocalTime.parse(timeString, TIME_FORMAT) }.getOrNull() }
     private fun dateFrom(dateString: String?): LocalDate? { return runCatching { LocalDate.parse(dateString, DATE_FORMAT) }.getOrNull() }
 
+    private val ROOM_REGEX = Regex("""(?<=^|\s)\d{1,2}-\d{3}[_a-zA-Zа-яА-Я]?(?=\s|$)""")
+    private val LESSON_TYPE_REGEX = Regex(LessonType.entries.joinToString(separator = "|") { Regex.escape(it.label) }.let { """(?<=^|\s)($it)(?=\s|$)""" } )
+    private val SUBGROUP_REGEX = Regex("""\d{2}\sподгруппа""", RegexOption.IGNORE_CASE)
+
     fun parse(pdfBytes: ByteArray): List<Day> {
         Log.d(TAG, "Parsing ${pdfBytes.size} bytes")
         val doc = try {
@@ -35,6 +40,8 @@ object PdfScheduleParser {
         }
 
         val days = mutableListOf<Day>()
+        var group: String? = null
+
         try {
             for (pageIndex in 0 until doc.numberOfPages) {
                 Log.v(TAG, "============ Page $pageIndex ============")
@@ -45,12 +52,6 @@ object PdfScheduleParser {
                 svg.processPage(page)
                 val cols = svg.asTable()
 
-                /** Вывод таблички из PDF в SVG формате + отладочные жлементы из [Pdf2Table.asTable] **/
-                Log.v(SVG_TAG,  "====")
-                for(line in  svg.asSvg().split("\n")) {
-                    Log.v(SVG_TAG,  line)
-                }
-
                 if(cols.size != 3) throw RuntimeException("Found columns: ${cols.size}/3")
 
                 // Парсинг текста
@@ -60,6 +61,11 @@ object PdfScheduleParser {
                 textStripper.getText(doc)
                 val texts = textStripper.blocks
 
+                for(text in texts) {
+                    svg.tableSvg.appendLine("<text x='${text.x}' y='${text.y}'>${text.text}</text>")
+                    svg.tableSvg.appendLine("<circle cx='${text.x}' cy='${text.y}' r='1' fill='red'/>")
+                }
+
                 val daysColumn      = cols[0] // Колонка "День", имеет формат "<день> dd.mm.yy"
                 val intervalsColumn = cols[1] // Колонка "Интервал", имеет формат "HH:mm-HH:mm"
                 val lessonsColumn   = cols[2] // Колонка с инофрмацией о паре
@@ -100,10 +106,17 @@ object PdfScheduleParser {
                     }
                 }
 
-
                 for (dayCell in daysColumn.cells) {
                     val day = content(dayCell).split(' ')
-                    if(day.size != 2) continue // XXX: добавить защиту от заголовка и выбрасывать исключения вместо пропуска?
+                    if(day.size == 1 && day.first() == "День") {
+                        val groupCell = select(lessonsColumn, dayCell).firstOrNull() ?: continue
+                        group = content(groupCell)
+                        continue
+                    }
+                    if(day.size != 2) {
+                        Log.w(TAG, "Day data is not in format <day> <date>: $day")
+                        continue // XXX: добавить защиту от заголовка и выбрасывать исключения вместо пропуска?
+                    }
 
                     val date = dateFrom(day[1]) ?: continue
                     val intervals = mutableListOf<TimeSlot>()
@@ -124,7 +137,55 @@ object PdfScheduleParser {
                             val content = content(lessonCell)
                             Log.v(TAG, "- $content")
                             // TODO: парсинг контента лекции
-                            lessons.add(Lesson(raw=content))
+
+                            // Поиск кабинета в строке, ибо он последний, если их несколько - то скорее всего разделение на подгруппы
+                            var found = 0
+                            var currentStart = 0
+                            for (roomMatch in ROOM_REGEX.findAll(content)) {
+                                found++
+
+                                val raw = content.substring(currentStart, roomMatch.range.last + 1)
+                                currentStart = roomMatch.range.last + 1
+
+                                // Предполагаемый формат: [группа], [XX подгруппа] <предмет> <тип> [id + тип] <ФИО> <кабинет>
+
+                                val room = roomMatch.value
+
+                                val typeMatch = LESSON_TYPE_REGEX.findAll(raw).toList()
+                                if(typeMatch.isEmpty()) {
+                                    lessons.add(Lesson(
+                                        raw=raw,
+                                        room=room,
+                                    ))
+                                    continue
+                                }
+                                var subject = raw.substring(0, typeMatch.first().range.first).trim() // TODO: сейчас [группа], [XX подгруппа] <предмет> - можно достать подгруппу
+                                val type = LessonType.fromRaw(typeMatch.first().value.trim())
+                                val teacher = raw.substring(typeMatch.last().range.last+1, raw.length - room.length).trim()
+                                var subgroup: String? = null
+                                Log.d(TAG, "$subject $group")
+                                if(group != null && subject.startsWith("$group,")) {
+                                    subject = subject.substring(group.length + 1).trim()
+                                    val subgroupMatch = SUBGROUP_REGEX.find(subject)
+                                    if(subgroupMatch != null) {
+                                        subgroup = subgroupMatch.value.trim()
+                                        subject = subject.removeRange(subgroupMatch.range).trim()
+                                    }
+                                }
+
+
+                                lessons.add(Lesson(
+                                    raw=raw,
+                                    subject=subject,
+                                    room=room,
+                                    type=type,
+                                    teacher=teacher,
+                                    subgroup=subgroup
+                                ))
+                            }
+
+                            if(found == 0) lessons.add(Lesson(raw=content))
+
                         }
                         intervals.add(TimeSlot(start = start, end = end, lessons = lessons))
                     }
@@ -133,6 +194,18 @@ object PdfScheduleParser {
                 for (text in texts.filter { it.rotation != 0f }) {
                     Log.v(TAG, "${text.x.roundToInt()}\t${text.y.roundToInt()}\t${text.text}")
                 }
+
+                /** Вывод таблички из PDF в SVG формате + отладочные жлементы из [Pdf2Table.asTable] **/
+                Log.v(SVG_TAG,  "====")
+                for(line in  svg.asSvg().split("\n")) {
+                    if(line.length > 250) {
+                        Log.v(SVG_TAG, "length: " + line.length)
+                        Log.v(SVG_TAG + "-" + (pageIndex+1),  "length: " + line.length)
+                        continue
+                    }
+                    Log.v(SVG_TAG,  line)
+                    Log.v(SVG_TAG + "-" + (pageIndex+1),  line)
+                }
             }
         } catch (e: Exception) {
             Log.e(TAG, "Parsing error", e)

app/src/main/java/agzam/vyatsu/data/remote/pdf/PdfTextParser.kt

@@ -7,6 +7,7 @@ import com.tom_roush.pdfbox.text.TextPosition
  * Парсер блоков текста из PDF
  * @author Agzam
  */
+
 class PdfTextParser : PDFTextStripper() {
 
     data class TextBlock(
@@ -25,21 +26,51 @@ class PdfTextParser : PDFTextStripper() {
     }
 
     override fun writeString(string: String?, textPositions: MutableList<TextPosition>?) {
-        if (!string.isNullOrBlank() && !textPositions.isNullOrEmpty()) {
-            val first = textPositions.first()
-            val last = textPositions.last()
+        if (textPositions.isNullOrEmpty()) return
 
-            val matrix = first.textMatrix
-            val rotation = first.dir
+        val currentWordChars = mutableListOf<TextPosition>()
 
-            val totalWidth = (last.xDirAdj + last.widthDirAdj) - first.xDirAdj
+        for (tp in textPositions) {
+            val unicode = tp.unicode
 
-            val x = matrix.translateX
-            val y = matrix.translateY - first.heightDir
-
-            val height = first.heightDir
-
-            blocks.add(TextBlock(string.trim(), x, currentPage.mediaBox.height - y - height, totalWidth, height, rotation))
+            if (unicode == " " || unicode == "\u00A0" || unicode == "\t") {
+                addWordBlock(currentWordChars)
+                currentWordChars.clear()
+            } else {
+                currentWordChars.add(tp)
+            }
         }
+
+        addWordBlock(currentWordChars)
+    }
+
+    private fun addWordBlock(wordChars: List<TextPosition>) {
+        if (wordChars.isEmpty()) return
+
+        val first = wordChars.first()
+        val last = wordChars.last()
+
+        val wordText = wordChars.joinToString("") { it.unicode }.trim()
+        if (wordText.isEmpty()) return
+
+        val matrix = first.textMatrix
+        val rotation = first.dir
+
+        val totalWidth = (last.xDirAdj + last.widthDirAdj) - first.xDirAdj
+
+        val x = matrix.translateX
+        val y = matrix.translateY - first.heightDir
+        val height = first.heightDir
+
+        blocks.add(
+            TextBlock(
+                text = wordText,
+                x = x,
+                y = currentPage.mediaBox.height - y - height,
+                width = totalWidth,
+                height = height,
+                rotation = rotation
+            )
+        )
     }
 }

app/src/main/java/agzam/vyatsu/data/repository/GroupRepositoryImpl.kt

@@ -5,6 +5,7 @@ import agzam.vyatsu.data.local.GroupEntity
 import agzam.vyatsu.data.remote.GroupsParser
 import agzam.vyatsu.data.remote.VyatsuHttpClient
 import agzam.vyatsu.data.remote.VyatsuUrls
+import agzam.vyatsu.domain.ScheduleDates
 import agzam.vyatsu.domain.model.Group
 import agzam.vyatsu.domain.model.Season
 import agzam.vyatsu.domain.repository.GroupRepository
@@ -50,16 +51,18 @@ class GroupRepositoryImpl(
                 id = group.id,
                 name = group.name,
                 faculty = group.faculty,
-                autumnFirst = autumn?.first ?: "",
-                autumnSecond = autumn?.second ?: "",
-                springFirst = spring?.first ?: "",
-                springSecond = spring?.second ?: "",
+                autumnFirst = autumn?.first?.let(::epochDay),
+                autumnSecond = autumn?.second?.let(::epochDay),
+                springFirst = spring?.first?.let(::epochDay),
+                springSecond = spring?.second?.let(::epochDay),
                 lastSyncedAt = now()
             )
         }
         groupDao.insertAll(entities)
     }
 
+    private fun epochDay(dateStr: String): Long = ScheduleDates.asDate(dateStr).toEpochDay()
+
     private fun now(): Long = System.currentTimeMillis()
 
     private fun GroupEntity.toDomain(): Group = Group(

app/src/main/java/agzam/vyatsu/data/repository/PreferencesRepositoryImpl.kt

@@ -9,4 +9,8 @@ class PreferencesRepositoryImpl(
     override suspend fun selectedGroupId(): String? = dao.selectedGroupId()
     override suspend fun setSelectedGroup(groupId: String) = dao.setSelectedGroup(groupId)
     override suspend fun clearSelectedGroup() = dao.clearSelectedGroup()
+    override suspend fun selectedWeekStart(): String? = dao.selectedWeekStart()
+    override suspend fun setSelectedWeekStart(weekStart: String) = dao.setSelectedWeekStart(weekStart)
+    override suspend fun selectedDayDate(): String? = dao.selectedDayDate()
+    override suspend fun setSelectedDayDate(date: String) = dao.setSelectedDayDate(date)
 }

app/src/main/java/agzam/vyatsu/data/repository/ScheduleRepositoryImpl.kt

@@ -1,6 +1,7 @@
 package agzam.vyatsu.data.repository
 
-import agzam.vyatsu.data.local.ScheduleCodec
+import agzam.vyatsu.data.local.DayEntity
+import agzam.vyatsu.data.local.LessonEntity
 import agzam.vyatsu.data.local.ScheduleDao
 import agzam.vyatsu.data.local.ScheduleEntity
 import agzam.vyatsu.data.local.GroupDao
@@ -9,39 +10,50 @@ import agzam.vyatsu.data.remote.pdf.PdfScheduleParser
 import agzam.vyatsu.data.remote.VyatsuHttpClient
 import agzam.vyatsu.data.remote.VyatsuUrls
 import agzam.vyatsu.domain.ScheduleDates
+import agzam.vyatsu.domain.model.Day
 import agzam.vyatsu.domain.model.DateRange
+import agzam.vyatsu.domain.model.Lesson
 import agzam.vyatsu.domain.model.Schedule
+import agzam.vyatsu.domain.model.SchedulePeriod
 import agzam.vyatsu.domain.model.Season
+import agzam.vyatsu.domain.model.TimeSlot
 import agzam.vyatsu.domain.repository.ScheduleRepository
 import android.util.Log
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.combine
+import java.time.LocalDate
+import java.time.LocalTime
 
 class ScheduleRepositoryImpl(
     private val scheduleDao: ScheduleDao,
-    private val groupDao: GroupDao,
-    private val codec: ScheduleCodec
+    private val groupDao: GroupDao
 ) : ScheduleRepository {
 
     override fun observeSchedule(groupId: String): Flow<Schedule?> =
-        scheduleDao.observe(groupId).map { it?.toDomain() }
+        combine(
+            scheduleDao.observeSchedules(groupId),
+            scheduleDao.observeDaysForGroup(groupId),
+            scheduleDao.observeLessonsForGroup(groupId)
+        ) { schedules, days, lessons ->
+            buildSchedule(schedules, days, lessons)
+        }
 
     override suspend fun getSchedule(groupId: String): Schedule? =
-        scheduleDao.get(groupId)?.toDomain()
+        buildSchedule(
+            scheduleDao.getSchedules(groupId),
+            scheduleDao.getDaysForGroup(groupId),
+            scheduleDao.getLessonsForGroup(groupId)
+        )
 
     override suspend fun sync(groupId: String): Schedule? {
         Log.d(TAG, "sync(groupId=$groupId) start")
-        val group = groupDao.getById(groupId)
-        if (group == null) {
+        val group = groupDao.getById(groupId) ?: run {
             Log.w(TAG, "sync: group $groupId not found in DB")
             return null
         }
         val season = ScheduleDates.currentSeason()
-        val range = dateRangeFor(group, season)
-        if (range == null) {
-            Log.w(TAG, "sync: no date range for season $season (group ${group.id}, " +
-                "autumn=[${group.autumnFirst}, ${group.autumnSecond}], " +
-                "spring=[${group.springFirst}, ${group.springSecond}])")
+        val range = dateRangeFor(group, season) ?: run {
+            Log.w(TAG, "sync: no date range for season $season (group ${group.id})")
             return null
         }
         Log.d(TAG, "sync: season=$season range=[${range.first}, ${range.second}]")
@@ -55,17 +67,26 @@ class ScheduleRepositoryImpl(
             val days = PdfScheduleParser.parse(bytes)
             Log.d(TAG, "sync: parsed ${days.size} days")
 
-            val entity = ScheduleEntity(
-                groupId = groupId,
-                season = season.name,
-                dateRangeFirst = range.first,
-                dateRangeSecond = range.second,
-                weeksJson = codec.toJson(days),
-                lastSyncedAt = now()
+            val weekStart = ScheduleDates.asDate(range.first).toEpochDay()
+            val weekEnd = ScheduleDates.asDate(range.second).toEpochDay()
+
+            val existing = scheduleDao.getSchedules(groupId)
+                .firstOrNull { it.season == season && it.weekStart == weekStart }
+            val scheduleId = if (existing != null) existing.id
+            else scheduleDao.insertSchedule(
+                ScheduleEntity(
+                    groupId = groupId,
+                    season = season,
+                    weekStart = weekStart,
+                    weekEnd = weekEnd,
+                    lastSyncedAt = now()
+                )
             )
-            scheduleDao.upsert(entity)
-            Log.d(TAG, "sync: upserted schedule for $groupId")
-            entity.toDomain()
+            replaceDays(scheduleId, days)
+
+            scheduleDao.trim(groupId, MAX_PERIODS)
+
+            getSchedule(groupId)
         } catch (e: Throwable) {
             Log.e(TAG, "sync: failed for $groupId (${e::class.simpleName}: ${e.message})", e)
             null
@@ -73,33 +94,124 @@ class ScheduleRepositoryImpl(
     }
 
     override suspend fun isStale(groupId: String): Boolean {
-        val entity = scheduleDao.get(groupId) ?: return true
-        return now() - entity.lastSyncedAt > STALE_WINDOW_MS
+        val schedules = scheduleDao.getSchedules(groupId)
+        val latest = schedules.maxByOrNull { it.weekStart } ?: return true
+        return now() - latest.lastSyncedAt > STALE_WINDOW_MS
     }
 
-    override suspend fun clear(groupId: String) = scheduleDao.delete(groupId)
+    override suspend fun clearPeriod(groupId: String, period: SchedulePeriod) {
+        scheduleDao.deleteSchedule(
+            groupId = groupId,
+            season = period.season.name,
+            weekStart = period.weekStart.toEpochDay()
+        )
+    }
+
+    override suspend fun clearAll(groupId: String) = scheduleDao.deleteAll(groupId)
+
+    private suspend fun replaceDays(scheduleId: Long, days: List<Day>) {
+        scheduleDao.deleteDaysForSchedule(scheduleId)
+        val dayEntities = days.map { DayEntity(scheduleId = scheduleId, date = it.date.toEpochDay()) }
+        val dayIds = scheduleDao.insertDays(dayEntities)
+        val dayIdByDate = dayEntities.zip(dayIds).associate { (day, id) -> LocalDate.ofEpochDay(day.date) to id }
+        val lessons = days.flatMap { day ->
+            day.intervals.flatMapIndexed { slotIndex, slot ->
+                slot.lessons.mapIndexed { lessonIndex, lesson ->
+                    LessonEntity(
+                        dayId = dayIdByDate.getValue(day.date),
+                        date = day.date.toEpochDay(),
+                        slotIndex = slotIndex,
+                        start = slot.start.toMinutesOfDay(),
+                        end = slot.end.toMinutesOfDay(),
+                        lessonIndex = lessonIndex,
+                        raw = lesson.raw,
+                        room = lesson.room,
+                        groupName = lesson.group,
+                        subgroup = lesson.subgroup,
+                        subject = lesson.subject,
+                        type = lesson.type,
+                        teacher = lesson.teacher
+                    )
+                }
+            }
+        }
+        scheduleDao.insertLessons(lessons)
+    }
+
+    private fun buildSchedule(
+        schedules: List<ScheduleEntity>,
+        dayEntities: List<DayEntity>,
+        lessonEntities: List<LessonEntity>
+    ): Schedule? {
+        if (schedules.isEmpty()) return null
+        val groupId = schedules.first().groupId
+
+        val periods = schedules.sortedBy { it.weekStart }.map {
+            SchedulePeriod(
+                weekStart = LocalDate.ofEpochDay(it.weekStart),
+                weekEnd = LocalDate.ofEpochDay(it.weekEnd),
+                season = it.season
+            )
+        }
+
+        val lessonsByDay = lessonEntities.groupBy { it.dayId }
+        val days = dayEntities
+            .sortedBy { it.date }
+            .distinctBy { it.date }
+            .map { day ->
+                val lessons = lessonsByDay[day.id].orEmpty()
+                    .groupBy { it.slotIndex }
+                    .toSortedMap()
+                    .map { (_, slotLessons) ->
+                        TimeSlot(
+                            start = LocalTime.of(slotLessons.first().start / 60, slotLessons.first().start % 60),
+                            end = LocalTime.of(slotLessons.first().end / 60, slotLessons.first().end % 60),
+                            lessons = slotLessons
+                                .sortedBy { it.lessonIndex }
+                                .map { it.toDomain() }
+                        )
+                    }
+                Day(date = LocalDate.ofEpochDay(day.date), intervals = lessons)
+            }
+
+        return Schedule(groupId = groupId, periods = periods, days = days)
+    }
+
+    private fun LessonEntity.toDomain(): Lesson = Lesson(
+        raw = raw,
+        room = room,
+        group = groupName,
+        subgroup = subgroup,
+        subject = subject,
+        type = type,
+        teacher = teacher
+    )
 
     private fun dateRangeFor(group: GroupEntity, season: Season): DateRange? {
         return when (season) {
-            Season.AUTUMN -> if (group.autumnFirst.isNotEmpty() && group.autumnSecond.isNotEmpty()) {
-                DateRange(group.autumnFirst, group.autumnSecond)
+            Season.AUTUMN -> if (group.autumnFirst != null && group.autumnSecond != null) {
+                DateRange(
+                    LocalDate.ofEpochDay(group.autumnFirst).format(RANGE_FMT),
+                    LocalDate.ofEpochDay(group.autumnSecond).format(RANGE_FMT)
+                )
             } else null
-            Season.SPRING -> if (group.springFirst.isNotEmpty() && group.springSecond.isNotEmpty()) {
-                DateRange(group.springFirst, group.springSecond)
+            Season.SPRING -> if (group.springFirst != null && group.springSecond != null) {
+                DateRange(
+                    LocalDate.ofEpochDay(group.springFirst).format(RANGE_FMT),
+                    LocalDate.ofEpochDay(group.springSecond).format(RANGE_FMT)
+                )
             } else null
         }
     }
 
-    private fun now(): Long = System.currentTimeMillis()
+    private fun LocalTime.toMinutesOfDay(): Int = hour * 60 + minute
 
-    private fun ScheduleEntity.toDomain(): Schedule = Schedule(
-        groupId = groupId,
-        season = Season.valueOf(season),
-        days = codec.fromJson(weeksJson)
-    )
+    private fun now(): Long = System.currentTimeMillis()
 
     companion object {
         private const val STALE_WINDOW_MS = 12 * 60 * 60 * 1000L
+        private const val MAX_PERIODS = 3
         private const val TAG = "ScheduleRepo"
+        private val RANGE_FMT = java.time.format.DateTimeFormatter.ofPattern("ddMMyyyy")
     }
 }

app/src/main/java/agzam/vyatsu/di/AppContainer.kt

@@ -1,7 +1,6 @@
 package agzam.vyatsu.di
 
 import agzam.vyatsu.data.local.AppDatabase
-import agzam.vyatsu.data.local.ScheduleCodec
 import agzam.vyatsu.data.remote.GroupsParser
 import agzam.vyatsu.data.remote.VyatsuHttpClient
 import agzam.vyatsu.data.repository.GroupRepositoryImpl
@@ -12,18 +11,15 @@ import agzam.vyatsu.domain.repository.PreferencesRepository
 import agzam.vyatsu.domain.repository.ScheduleRepository
 import android.content.Context
 import androidx.room.Room
-import com.squareup.moshi.Moshi
 
 class AppContainer(context: Context) {
-    private val moshi: Moshi = Moshi.Builder().build()
-
     private val database: AppDatabase = Room.databaseBuilder(
         context.applicationContext,
         AppDatabase::class.java,
         "vyatsu_schedule.db"
-    ).build()
-
-    private val codec: ScheduleCodec = ScheduleCodec(moshi)
+    )
+        .fallbackToDestructiveMigration(dropAllTables = true)
+        .build()
 
     val groupRepository: GroupRepository by lazy {
         GroupRepositoryImpl(
@@ -35,7 +31,6 @@ class AppContainer(context: Context) {
         ScheduleRepositoryImpl(
             scheduleDao = database.scheduleDao(),
             groupDao = database.groupDao(),
-            codec = codec
         )
     }
 

app/src/main/java/agzam/vyatsu/domain/model/Schedule.kt

@@ -1,17 +1,21 @@
 package agzam.vyatsu.domain.model
 
-/**
- * Расписание группы, как правило содержит 2 недели
- * @author Agzam
- */
+import java.time.LocalDate
+
+data class SchedulePeriod(
+    val weekStart: LocalDate,
+    val weekEnd: LocalDate,
+    val season: Season
+)
+
 data class Schedule(
-
     val groupId: String,
-    val season: Season,
-
-    /** Может содержать более 7 дней */
+    val periods: List<SchedulePeriod>,
     val days: List<Day>
-
 ) {
+    fun periodOf(date: LocalDate): SchedulePeriod? =
+        periods.firstOrNull { !date.isBefore(it.weekStart) && !date.isAfter(it.weekEnd) }
 
+    fun daysOf(period: SchedulePeriod): List<Day> =
+        days.filter { !it.date.isBefore(period.weekStart) && !it.date.isAfter(period.weekEnd) }
 }

app/src/main/java/agzam/vyatsu/domain/repository/PreferencesRepository.kt

@@ -4,4 +4,8 @@ interface PreferencesRepository {
     suspend fun selectedGroupId(): String?
     suspend fun setSelectedGroup(groupId: String)
     suspend fun clearSelectedGroup()
+    suspend fun selectedWeekStart(): String?
+    suspend fun setSelectedWeekStart(weekStart: String)
+    suspend fun selectedDayDate(): String?
+    suspend fun setSelectedDayDate(date: String)
 }

app/src/main/java/agzam/vyatsu/domain/repository/ScheduleRepository.kt

@@ -1,6 +1,7 @@
 package agzam.vyatsu.domain.repository
 
 import agzam.vyatsu.domain.model.Schedule
+import agzam.vyatsu.domain.model.SchedulePeriod
 import kotlinx.coroutines.flow.Flow
 
 interface ScheduleRepository {
@@ -8,5 +9,6 @@ interface ScheduleRepository {
     suspend fun getSchedule(groupId: String): Schedule?
     suspend fun sync(groupId: String): Schedule?
     suspend fun isStale(groupId: String): Boolean
-    suspend fun clear(groupId: String)
+    suspend fun clearPeriod(groupId: String, period: SchedulePeriod)
+    suspend fun clearAll(groupId: String)
 }

app/src/main/java/agzam/vyatsu/ui/schedule/ScheduleScreen.kt

@@ -1,8 +1,12 @@
 package agzam.vyatsu.ui.schedule
 
 import agzam.vyatsu.domain.model.Day
+import agzam.vyatsu.domain.model.LessonType
+import agzam.vyatsu.domain.model.SchedulePeriod
 import agzam.vyatsu.domain.model.TimeSlot
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.WindowInsets
@@ -11,13 +15,18 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.only
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.systemBars
+import androidx.compose.foundation.layout.widthIn
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyRow
+import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowDropDown
 import androidx.compose.material.icons.filled.Refresh
 import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.FilterChip
 import androidx.compose.material3.FilterChipDefaults
@@ -31,10 +40,15 @@ import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
 import androidx.compose.ui.unit.dp
 import java.time.DayOfWeek
+import java.time.LocalDate
 import java.time.format.DateTimeFormatter
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -44,7 +58,7 @@ fun ScheduleScreen(viewModel: ScheduleViewModel, onSwitchGroup: () -> Unit) {
 
     Column(Modifier.fillMaxSize()) {
         TopAppBar(
-            title = { Text("Расписание") },
+            title = { Text(state.groupName ?: "Расписание", style = MaterialTheme.typography.titleMedium) },
             actions = {
                 TextButton(onClick = { onSwitchGroup() }) {
                     Text("Сменить группу")
@@ -53,9 +67,9 @@ fun ScheduleScreen(viewModel: ScheduleViewModel, onSwitchGroup: () -> Unit) {
                     Icon(Icons.Default.Refresh, contentDescription = "Обновить")
                 }
             },
-            windowInsets = WindowInsets.systemBars.only(androidx.compose.foundation.layout.WindowInsetsSides.Top)
+            windowInsets = WindowInsets(0.dp)
         )
-        Column(Modifier.fillMaxSize().padding(horizontal =  16.dp, vertical = 0.dp)) {
+        Column(Modifier.fillMaxSize().padding(horizontal = 16.dp, vertical = 0.dp)) {
             when {
                 state.isSyncing && state.schedule == null -> {
                     Row(
@@ -83,27 +97,44 @@ fun ScheduleScreen(viewModel: ScheduleViewModel, onSwitchGroup: () -> Unit) {
 
                 else -> {
                     val schedule = state.schedule!!
-                    val day = schedule.days.getOrNull(state.selectedIndex)
+                    val weekDays = state.weekStart
+                        ?.let { ws -> schedule.periods.firstOrNull { it.weekStart == ws } }
+                        ?.let { schedule.daysOf(it) }
+                        .orEmpty()
+                    val day = schedule.days.firstOrNull { it.date == state.dayDate }
+
                     if (day == null) {
                         Text("Занятий нет", style = MaterialTheme.typography.bodyLarge)
                     } else {
-                        val isToday = state.selectedIndex == state.todayIndex
-                        val dayLabel = if (isToday) "Сегодня " else ""
+                        val isTodayDay = day.date == state.todayDate
+                        val dayLabel = if (isTodayDay) "Сегодня " else ""
 
-                        Text(
-                            "$dayLabel ${dayName(day.date.dayOfWeek)} · ${day.date.format(FULL_DATE)}",
-                            style = MaterialTheme.typography.titleMedium
-                        )
-                        HorizontalDivider(Modifier.padding(vertical = 8.dp))
+                        Row(
+                            Modifier.fillMaxWidth(),
+                            verticalAlignment = Alignment.CenterVertically
+                        ) {
+                            Text(
+                                "$dayLabel${dayName(day.date.dayOfWeek)} · ${day.date.format(FULL_DATE)}",
+                                style = MaterialTheme.typography.titleMedium,
+                                modifier = Modifier.weight(1f)
+                            )
+                            WeekSelector(
+                                periods = schedule.periods,
+                                selectedWeekStart = state.weekStart,
+                                todayWeekStart = state.todayDate?.let { schedule.periodOf(it)?.weekStart },
+                                onSelect = viewModel::selectWeek
+                            )
+                        }
+                        HorizontalDivider(Modifier.padding(top = 8.dp, bottom = 0.dp))
 
                         DayChips(
-                            days = schedule.days,
-                            selectedIndex = state.selectedIndex,
-                            todayIndex = state.todayIndex,
+                            days = weekDays,
+                            selectedDate = state.dayDate,
+                            todayDate = state.todayDate,
                             onSelect = viewModel::selectDay
                         )
 
-                        HorizontalDivider(Modifier.padding(vertical = 8.dp))
+                        HorizontalDivider(Modifier.padding(top=0.dp, bottom = 8.dp))
 
                         if (day.intervals.all { it.lessons.isEmpty() }) {
                             Text("Занятий нет", style = MaterialTheme.typography.bodyLarge)
@@ -124,20 +155,85 @@ fun ScheduleScreen(viewModel: ScheduleViewModel, onSwitchGroup: () -> Unit) {
     }
 }
 
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun WeekSelector(
+    periods: List<SchedulePeriod>,
+    selectedWeekStart: LocalDate?,
+    todayWeekStart: LocalDate?,
+    onSelect: (LocalDate) -> Unit
+) {
+    val selected = periods.firstOrNull { it.weekStart == selectedWeekStart }
+    var expanded by remember { mutableStateOf(false) }
+
+    Box {
+        Row(
+            modifier = Modifier
+                .clip(MaterialTheme.shapes.small)
+                .clickable(enabled = true, onClick = { expanded = true })
+                .padding(horizontal = 10.dp, vertical = 8.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Text(
+                selected?.let(::weekLabel) ?: "Период",
+                style = MaterialTheme.typography.labelLarge,
+                color = MaterialTheme.colorScheme.primary
+            )
+            Icon(
+                imageVector = Icons.Default.ArrowDropDown,
+                contentDescription = null,
+                tint = MaterialTheme.colorScheme.primary
+            )
+        }
+        DropdownMenu(
+            expanded = expanded,
+            onDismissRequest = { expanded = false },
+            modifier = Modifier.widthIn(min = 220.dp)
+        ) {
+            periods.forEach { period ->
+                val isTodayWeek = todayWeekStart == period.weekStart
+                DropdownMenuItem(
+                    text = {
+                        Text(
+                            weekLabel(period),
+                            style = MaterialTheme.typography.bodyLarge
+                        )
+                    },
+                    trailingIcon = if (isTodayWeek) {
+                        {
+                            Text(
+                                "сегодня",
+                                style = MaterialTheme.typography.labelMedium,
+                                color = MaterialTheme.colorScheme.primary
+                            )
+                        }
+                    } else {
+                        null
+                    },
+                    onClick = {
+                        expanded = false
+                        onSelect(period.weekStart)
+                    }
+                )
+            }
+        }
+    }
+}
+
 @Composable
 private fun DayChips(
     days: List<Day>,
-    selectedIndex: Int,
-    todayIndex: Int,
-    onSelect: (Int) -> Unit
+    selectedDate: LocalDate?,
+    todayDate: LocalDate?,
+    onSelect: (LocalDate) -> Unit
 ) {
     LazyRow(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
-        itemsIndexed(days) { index, day ->
-            val selected = selectedIndex == index
-            val isTodayChip = todayIndex == index
+        items(days, key = { it.date.toEpochDay() }) { day ->
+            val selected = selectedDate == day.date
+            val isTodayChip = todayDate == day.date
             FilterChip(
                 selected = selected,
-                onClick = { onSelect(index) },
+                onClick = { onSelect(day.date) },
                 label = {
                     Column(horizontalAlignment = Alignment.CenterHorizontally) {
                         Text(
@@ -172,6 +268,11 @@ private fun DayChips(
     }
 }
 
+private fun weekLabel(period: SchedulePeriod): String {
+    val first = period.weekStart
+    return "с ${first.format(CHIP_DATE)}"
+}
+
 @Composable
 private fun LessonSlot(slotIndex: Int, slot: TimeSlot) {
     Column(Modifier.fillMaxWidth()) {
@@ -185,18 +286,48 @@ private fun LessonSlot(slotIndex: Int, slot: TimeSlot) {
         } else {
             slot.lessons.forEach { lesson ->
                 Column(Modifier.fillMaxWidth().padding(vertical = 2.dp)) {
-                    Text(
-                        lesson.subject?.takeIf { it.isNotBlank() } ?: lesson.raw,
-                        style = MaterialTheme.typography.bodyLarge
-                    )
-                    Text(
-                        listOf(lesson.type.label, lesson.subgroup, lesson.teacher, lesson.room)
-                            .filterNotNull()
-                            .filter { it.isNotBlank() }
-                            .joinToString(" · "),
-                        style = MaterialTheme.typography.bodySmall,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant
-                    )
+                    var any = false
+                    if(lesson.type != LessonType.OTHER) {
+                        Text(
+                            lesson.type.label,
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant
+                        )
+                        any = true
+                    }
+
+                    val subject = lesson.subject?.takeIf { it.isNotBlank() } ?: lesson.raw
+                    if(subject.isNotEmpty()) {
+                        Text(
+                            subject,
+                            style = MaterialTheme.typography.bodyLarge
+                        )
+                        any = true
+                    }
+
+                    val meta = listOfNotNull(
+                        lesson.subgroup,
+                        lesson.teacher,
+                        lesson.room
+                    ).filter { it.isNotBlank() }.joinToString(" · ")
+
+                    if(meta.isNotEmpty()) {
+                        Text(
+                            meta,
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant
+                        )
+                        any = true
+                    }
+
+                    if(!any) {
+                        Text(
+                            "-",
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant
+                        )
+                    }
+
                 }
             }
         }
@@ -215,4 +346,4 @@ private fun dayName(dayOfWeek: DayOfWeek): String = when (dayOfWeek) {
 
 private val FULL_DATE: DateTimeFormatter = DateTimeFormatter.ofPattern("dd.MM.yyyy")
 private val CHIP_DATE: DateTimeFormatter = DateTimeFormatter.ofPattern("dd.MM")
-private val TIME: DateTimeFormatter = DateTimeFormatter.ofPattern("HH:mm")
+private val TIME: DateTimeFormatter = DateTimeFormatter.ofPattern("HH:mm")

app/src/main/java/agzam/vyatsu/ui/schedule/ScheduleViewModel.kt

@@ -1,8 +1,8 @@
 package agzam.vyatsu.ui.schedule
 
 import agzam.vyatsu.domain.ScheduleDates
-import agzam.vyatsu.domain.model.Day
 import agzam.vyatsu.domain.model.Schedule
+import agzam.vyatsu.domain.repository.GroupRepository
 import agzam.vyatsu.domain.repository.PreferencesRepository
 import agzam.vyatsu.domain.repository.ScheduleRepository
 import androidx.lifecycle.ViewModel
@@ -11,10 +11,12 @@ import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.launch
+import java.time.LocalDate
 
 class ScheduleViewModel(
     private val scheduleRepository: ScheduleRepository,
-    private val preferencesRepository: PreferencesRepository
+    private val preferencesRepository: PreferencesRepository,
+    private val groupRepository: GroupRepository
 ) : ViewModel() {
 
     private val _uiState = MutableStateFlow(ScheduleUiState())
@@ -28,7 +30,7 @@ class ScheduleViewModel(
             if (groupId != null) {
                 selectGroup(groupId)
             } else {
-                _uiState.value = _uiState.value.copy(noGroup = true)
+            _uiState.value = _uiState.value.copy(noGroup = true, groupName = null)
             }
         }
     }
@@ -37,32 +39,105 @@ class ScheduleViewModel(
         currentGroupId = groupId
         viewModelScope.launch {
             preferencesRepository.setSelectedGroup(groupId)
-            _uiState.value = _uiState.value.copy(noGroup = false)
+            val groupName = groupRepository.getGroups().firstOrNull { it.id == groupId }?.name
+
+            val savedWeekStart = runCatching {
+                preferencesRepository.selectedWeekStart()?.let(LocalDate::parse)
+            }.getOrNull()
+            val savedDayDate = runCatching {
+                preferencesRepository.selectedDayDate()?.let(LocalDate::parse)
+            }.getOrNull()
+            _uiState.value = _uiState.value.copy(
+                noGroup = false,
+                groupName = groupName,
+                weekStart = savedWeekStart,
+                dayDate = savedDayDate
+            )
 
             launch {
                 scheduleRepository.observeSchedule(groupId).collect { schedule ->
-                    currentGroupId?.let {
-                        val days = schedule?.days.orEmpty()
-                        val today = todayIndex(days)
-                        val current = _uiState.value
-                        val selected = current.selectedIndex.takeIf { i -> i in days.indices } ?: today
-                        _uiState.value = current.copy(
-                            schedule = schedule,
-                            todayIndex = today,
-                            selectedIndex = selected
-                        )
-                    }
+                    currentGroupId?.let { applySchedule(schedule) }
                 }
             }
 
             launch {
-                _uiState.value = _uiState.value.copy(isSyncing = true)
-                scheduleRepository.sync(groupId)
-                _uiState.value = _uiState.value.copy(isSyncing = false)
+                syncIfMissingToday(groupId)
             }
         }
     }
 
+    private suspend fun applySchedule(schedule: Schedule?) {
+        val current = _uiState.value
+        if (schedule == null || schedule.periods.isEmpty()) {
+            _uiState.value = current.copy(schedule = schedule, todayDate = null)
+            return
+        }
+        val today = ScheduleDates.moscowToday()
+        val todayDate = if (schedule.periodOf(today) != null) today else null
+
+        val weekStart = when {
+            schedule.periods.any { it.weekStart == current.weekStart } -> current.weekStart!!
+            todayDate != null -> schedule.periodOf(todayDate)!!.weekStart
+            else -> schedule.periods.first().weekStart
+        }
+        val period = schedule.periods.first { it.weekStart == weekStart }
+        val weekDays = schedule.daysOf(period)
+
+        val dayDate = when {
+            weekDays.any { it.date == current.dayDate } -> current.dayDate
+            weekDays.any { it.date == todayDate } -> todayDate
+            else -> weekDays.firstOrNull()?.date
+        }
+
+        preferencesRepository.setSelectedWeekStart(weekStart.toString())
+        dayDate?.let { preferencesRepository.setSelectedDayDate(it.toString()) }
+
+        _uiState.value = current.copy(
+            schedule = schedule,
+            weekStart = weekStart,
+            dayDate = dayDate,
+            todayDate = todayDate
+        )
+    }
+
+    fun selectWeek(weekStart: LocalDate) {
+        val state = _uiState.value
+        val schedule = state.schedule ?: return
+        val period = schedule.periods.firstOrNull { it.weekStart == weekStart } ?: return
+        viewModelScope.launch {
+            val today = ScheduleDates.moscowToday()
+            val weekDays = schedule.daysOf(period)
+            val dayDate = when {
+                weekDays.any { it.date == today } -> today
+                else -> weekDays.firstOrNull()?.date
+            }
+            preferencesRepository.setSelectedWeekStart(weekStart.toString())
+            dayDate?.let { preferencesRepository.setSelectedDayDate(it.toString()) }
+            _uiState.value = _uiState.value.copy(weekStart = weekStart, dayDate = dayDate)
+        }
+    }
+
+    fun selectDay(date: LocalDate) {
+        val state = _uiState.value
+        val schedule = state.schedule ?: return
+        val period = schedule.periodOf(date) ?: return
+        viewModelScope.launch {
+            preferencesRepository.setSelectedWeekStart(period.weekStart.toString())
+            preferencesRepository.setSelectedDayDate(date.toString())
+            _uiState.value = _uiState.value.copy(weekStart = period.weekStart, dayDate = date)
+        }
+    }
+
+    private suspend fun syncIfMissingToday(groupId: String) {
+        val schedule = scheduleRepository.getSchedule(groupId)
+        val today = ScheduleDates.moscowToday()
+        val hasTodayPeriod = schedule?.periodOf(today) != null
+        if (hasTodayPeriod) return
+        _uiState.value = _uiState.value.copy(isSyncing = true)
+        scheduleRepository.sync(groupId)
+        _uiState.value = _uiState.value.copy(isSyncing = false)
+    }
+
     fun switchGroup() {
         viewModelScope.launch {
             currentGroupId = null
@@ -76,30 +151,25 @@ class ScheduleViewModel(
         viewModelScope.launch {
             _uiState.value = _uiState.value.copy(isRefreshing = true)
             scheduleRepository.sync(groupId)
-            val current = _uiState.value
-            val days = current.schedule?.days.orEmpty()
-            val today = todayIndex(days)
-            _uiState.value = current.copy(
-                isRefreshing = false,
-                todayIndex = today,
-                selectedIndex = current.selectedIndex.takeIf { it in days.indices } ?: today
-            )
+            _uiState.value = _uiState.value.copy(isRefreshing = false)
         }
     }
 
-    fun selectDay(index: Int) {
-        val days = _uiState.value.schedule?.days.orEmpty()
-        if (index !in days.indices) return
-        _uiState.value = _uiState.value.copy(selectedIndex = index)
+    fun clearAll() {
+        val groupId = currentGroupId ?: return
+        viewModelScope.launch {
+            scheduleRepository.clearAll(groupId)
+        }
     }
 
-    private fun todayIndex(days: List<Day>): Int {
-        if (days.isEmpty()) return 0
-        val today = ScheduleDates.moscowToday()
-        val exact = days.indexOfFirst { it.date == today }
-        if (exact >= 0) return exact
-        val next = days.indexOfFirst { !it.date.isBefore(today) }
-        return if (next >= 0) next else days.lastIndex
+    fun clearSelectedPeriod() {
+        val state = _uiState.value
+        val schedule = state.schedule ?: return
+        val weekStart = state.weekStart ?: return
+        val period = schedule.periods.firstOrNull { it.weekStart == weekStart } ?: return
+        viewModelScope.launch {
+            scheduleRepository.clearPeriod(schedule.groupId, period)
+        }
     }
 }
 
@@ -108,6 +178,8 @@ data class ScheduleUiState(
     val isRefreshing: Boolean = false,
     val isSyncing: Boolean = false,
     val schedule: Schedule? = null,
-    val todayIndex: Int = 0,
-    val selectedIndex: Int = 0
+    val groupName: String? = null,
+    val weekStart: LocalDate? = null,
+    val dayDate: LocalDate? = null,
+    val todayDate: LocalDate? = null
 )