first commit

src/database/DatabaseFactory.kt

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+package com.kmalbz.database
+
+import com.typesafe.config.ConfigFactory
+import com.zaxxer.hikari.*
+import io.ktor.config.HoconApplicationConfig
+import io.ktor.util.KtorExperimentalAPI
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.jetbrains.exposed.sql.*
+import org.jetbrains.exposed.sql.transactions.transaction
+
+object DatabaseFactory {
+
+    @KtorExperimentalAPI
+    private val appConfig = HoconApplicationConfig(ConfigFactory.load())
+    @KtorExperimentalAPI
+    private val dbUrl = appConfig.property("ktor.db.jdbc").getString()
+    @KtorExperimentalAPI
+    private val dbUser = appConfig.property("ktor.db.user").getString()
+    @KtorExperimentalAPI
+    private val dbPassword = appConfig.property("ktor.db.password").getString()
+
+    @KtorExperimentalAPI
+    fun init() {
+        Database.connect(hikari())
+    }
+
+    @KtorExperimentalAPI
+    private fun hikari(): HikariDataSource {
+        val config = HikariConfig()
+        config.driverClassName = "org.postgresql.Driver"
+        config.jdbcUrl = dbUrl
+        config.username = dbUser
+        config.password = dbPassword
+        config.maximumPoolSize = 3
+        config.isAutoCommit = false
+        config.transactionIsolation = "TRANSACTION_REPEATABLE_READ"
+        config.validate()
+        return HikariDataSource(config)
+    }
+
+    suspend fun <T> dbQuery(block: () -> T): T =
+        withContext(Dispatchers.IO) {
+            transaction { block() }
+        }
+}

src/database/dao/SampleObjects.kt

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+package com.kmalbz.database.dao
+
+import org.jetbrains.exposed.dao.id.IntIdTable
+import org.jetbrains.exposed.sql.*
+import org.jetbrains.exposed.sql.`java-time`.date
+import java.time.LocalDate
+
+object SampleObjects : IntIdTable() {
+    val tag: Column<String> = varchar("tag", 32)
+    val timestamp: Column<LocalDate> = date("timestamp").default(LocalDate.now())
+    val device_id: Column<Int> = integer("device_id")
+    val device_date: Column<LocalDate> = date("device_date")
+    override val primaryKey = PrimaryKey(id, name = "PK_ResultObject_Id")
+}

src/database/model/SampleObject.kt

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+package com.kmalbz.database.model
+
+import com.kmalbz.database.dao.SampleObjects
+import org.jetbrains.exposed.dao.IntEntity
+import org.jetbrains.exposed.dao.IntEntityClass
+import org.jetbrains.exposed.dao.id.EntityID
+
+class SampleObject(id: EntityID<Int>): IntEntity(id) {
+    companion object : IntEntityClass<SampleObject>(SampleObjects)
+    var tag by SampleObjects.tag
+    var timestamp by SampleObjects.timestamp
+    var device_id by SampleObjects.device_id
+    var device_date by SampleObjects.device_date
+}

src/database/service/ISampleObjectService.kt

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+package com.kmalbz.database.service
+
+import com.kmalbz.api.model.ApiObject
+import java.time.LocalDate
+import java.util.*
+
+interface ISampleObjectService{
+    fun addOne(apiObject: ApiObject)
+    suspend fun getAllSampleObjects(): List<ApiObject>
+    suspend fun getSampleObjectbyTag(tag: String): ApiObject?
+    suspend fun getSampleObjectbyDate(date: LocalDate): List<ApiObject>?
+    suspend fun getSampleObjectbeforeDate(date: LocalDate): List<ApiObject>?
+    suspend fun getSampleObjectafterDate(date: LocalDate): List<ApiObject>?
+    suspend fun getSampleObjecGreaterthanId(id: Int): List<ApiObject>?
+    suspend fun getSampleObjecLessthanId(id: Int): List<ApiObject>?
+    suspend fun getSampleObjecEqualsId(id: Int): List<ApiObject>?
+}

src/database/service/SampleObjectService.kt

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+package com.kmalbz.database.service
+
+import com.kmalbz.database.DatabaseFactory.dbQuery
+import com.kmalbz.database.model.SampleObject
+import com.kmalbz.database.dao.SampleObjects
+import com.kmalbz.api.model.ApiObject
+import org.jetbrains.exposed.sql.ResultRow
+import org.jetbrains.exposed.sql.select
+import org.jetbrains.exposed.sql.selectAll
+import org.jetbrains.exposed.sql.transactions.transaction
+import java.time.LocalDate
+import java.util.*
+
+
+class SampleObjectService : ISampleObjectService {
+
+    override fun addOne(apiObject: ApiObject) {
+        transaction {
+            SampleObject.new {
+                tag = apiObject.tag
+                device_date = apiObject.device_date
+                device_id = apiObject.device_id
+            }
+        }
+    }
+
+    override suspend fun getAllSampleObjects(): List<ApiObject> = dbQuery {
+        SampleObjects.selectAll().map { toResultObject(it) }
+    }
+
+    override suspend fun getSampleObjectbyTag(tag: String): ApiObject? = dbQuery {
+        SampleObjects.select {
+            (SampleObjects.tag eq tag)
+        }.mapNotNull { toResultObject(it) }
+            .singleOrNull()
+    }
+
+    override suspend fun getSampleObjectbyDate(date: LocalDate): List<ApiObject>? = dbQuery {
+        SampleObjects.select {
+            (SampleObjects.date eq date)
+        }.mapNotNull { toResultObject(it) }
+    }
+
+    override suspend fun getSampleObjectbeforeDate(date: LocalDate): List<ApiObject>? = dbQuery {
+        SampleObjects.select {
+            (SampleObjects.date less  date)
+        }.mapNotNull { toResultObject(it) }
+    }
+
+    override suspend fun getSampleObjectafterDate(date: LocalDate): List<ApiObject>? = dbQuery {
+        SampleObjects.select {
+            (SampleObjects.date greater  date)
+        }.mapNotNull { toResultObject(it) }
+    }
+
+    override suspend fun getSampleObjecGreaterthanId(probability: Double): List<ApiObject>? = dbQuery {
+        SampleObjects.select {
+            (SampleObjects.probability greater  probability)
+        }.mapNotNull { toResultObject(it) }
+    }
+
+    override suspend fun getSampleObjecLessthanId(probability: Double): List<ApiObject>? = dbQuery {
+        SampleObjects.select {
+            (SampleObjects.probability less  probability)
+        }.mapNotNull { toResultObject(it) }
+    }
+
+    override suspend fun getSampleObjecEqualsId(probability: Double): List<ApiObject>? = dbQuery {
+        SampleObjects.select {
+            (SampleObjects.probability eq  probability)
+        }.mapNotNull { toResultObject(it) }
+    }
+
+    private fun toResultObject(row: ResultRow): ApiObject =
+        ApiObject(
+            tag = row[SampleObjects.tag],
+            device_date = row[SampleObjects.device_date],
+            device_id = row[SampleObjects.device_id],
+            id = row[SampleObjects.id.]
+        )
+}