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Fix more than one current semester in database (#304)

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This commit is contained in:
Rafał Borcz
2019-03-24 20:21:05 +01:00
committed by Mikołaj Pich
parent 3656d3161f
commit ed9458d9a5
13 changed files with 138 additions and 32 deletions
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13
app/src/main/java/io/github/wulkanowy/data/db/dao/SemesterDao.kt
View File

@ -1,8 +1,8 @@
package io.github.wulkanowy.data.db.dao
import androidx.room.Dao
import androidx.room.Delete
import androidx.room.Insert
import androidx.room.OnConflictStrategy.IGNORE
import androidx.room.Query
import io.github.wulkanowy.data.db.entities.Semester
import io.reactivex.Maybe
@ -12,15 +12,12 @@ import javax.inject.Singleton
@Dao
interface SemesterDao {
@Insert(onConflict = IGNORE)
@Insert
fun insertAll(semester: List<Semester>)
@Delete
fun deleteAll(semester: List<Semester>)
@Query("SELECT * FROM Semesters WHERE student_id = :studentId")
fun loadAll(studentId: Int): Maybe<List<Semester>>
@Query("UPDATE Semesters SET is_current = 1 WHERE semester_id = :semesterId AND diary_id = :diaryId")
fun updateCurrent(semesterId: Int, diaryId: Int)
@Query("UPDATE Semesters SET is_current = 0 WHERE student_id = :studentId")
fun resetCurrent(studentId: Int)
}

13
app/src/main/java/io/github/wulkanowy/data/repositories/semester/SemesterLocal.kt
View File

@ -11,17 +11,14 @@ import javax.inject.Singleton
class SemesterLocal @Inject constructor(private val semesterDb: SemesterDao) {
fun saveSemesters(semesters: List<Semester>) {
return semesterDb.insertAll(semesters)
semesterDb.insertAll(semesters)
}
fun deleteSemesters(semesters: List<Semester>) {
semesterDb.deleteAll(semesters)
}
fun getSemesters(student: Student): Maybe<List<Semester>> {
return semesterDb.loadAll(student.studentId).filter { !it.isEmpty() }
}
fun setCurrentSemester(semester: Semester) {
semesterDb.run {
resetCurrent(semester.studentId)
updateCurrent(semester.semesterId, semester.diaryId)
}
}
}

16
app/src/main/java/io/github/wulkanowy/data/repositories/semester/SemesterRepository.kt
View File

@ -7,6 +7,7 @@ import io.github.wulkanowy.data.db.entities.Semester
import io.github.wulkanowy.data.db.entities.Student
import io.reactivex.Maybe
import io.reactivex.Single
import timber.log.Timber
import java.net.UnknownHostException
import javax.inject.Inject
import javax.inject.Singleton
@ -25,10 +26,17 @@ class SemesterRepository @Inject constructor(
.switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
.flatMap {
if (it) remote.getSemesters(student) else Single.error(UnknownHostException())
}.map { newSemesters ->
local.apply {
saveSemesters(newSemesters)
setCurrentSemester(newSemesters.single { it.isCurrent })
}.flatMap { new ->
val currentSemesters = new.filter { it.isCurrent }
if (currentSemesters.size == 1) {
local.getSemesters(student).toSingle(emptyList())
.doOnSuccess { old ->
local.deleteSemesters(old - new)
local.saveSemesters(new - old)
}
} else {
Timber.i("Current semesters list:\n${currentSemesters.joinToString(separator = "\n")}")
throw IllegalArgumentException("Current semester can be only one.")
}
}.flatMap { local.getSemesters(student).toSingle(emptyList()) })
}