csamsserver/src/MySQL.kt

package com.gyf.csams

import com.zaxxer.hikari.HikariConfig
import com.zaxxer.hikari.HikariDataSource
import io.ktor.application.*
import org.jetbrains.exposed.sql.Database
import org.jetbrains.exposed.sql.SchemaUtils
import org.jetbrains.exposed.sql.transactions.transaction
import javax.sql.DataSource


class MySQL private constructor(val dataSource: DataSource? = null) {
    companion object {
        @Volatile
        private var instance: MySQL? = null

        fun getInstance(dataSource: DataSource?) =
            instance ?: synchronized(this) {
                instance ?: MySQL(dataSource).also { instance = it }
            }

    }

}

fun Application.MySQL(testing: Boolean = false){
    val config = HikariConfig().apply {
        jdbcUrl         = environment.config.property("ktor.deployment.mysql.jdbcUrl").getString()
        driverClassName = environment.config.property("ktor.deployment.mysql.driverClassName").getString()
        username        = environment.config.property("ktor.deployment.mysql.username").getString()
        password        = environment.config.property("ktor.deployment.mysql.password").getString()
        maximumPoolSize = 10
    }
    val dataSource = HikariDataSource(config)
    Database.connect(dataSource)
    MySQL.getInstance(dataSource)

    initTable()
}

fun initTable(){
    transaction {
        val tableList= arrayOf(Users,UserTokens)
        SchemaUtils.createMissingTablesAndColumns(*tableList)
        updateComment(*tableList)
    }
}