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package space.anity
import at.favre.lib.crypto.bcrypt.*
import org.jetbrains.exposed.sql.*
import org.jetbrains.exposed.sql.transactions.*
import java.sql.*
import java.util.logging.*
class DatabaseController(dbFileLocation: String = "main.db") {
val db: Database = Database.connect("jdbc:sqlite:$dbFileLocation", "org.sqlite.JDBC")
private val log = Logger.getLogger(this.javaClass.name)
/**
* Database table indexing the file locations
*/
object FileLocation : Table() {
val id = integer("id").autoIncrement().primaryKey()
val location = text("location").uniqueIndex()
val username = varchar("username", 24)
}
/**
* Database table indexing the users with their regarding passwords
*/
object UserData : Table() {
val id = integer("id").autoIncrement().primaryKey()
val username = varchar("username", 24).uniqueIndex()
val password = varchar("password", 64)
}
/**
* Database table indexing the users with their regarding role (multi line per user)
*/
object UserRoles : Table() {
val id = integer("id").autoIncrement().primaryKey()
val userId = integer("userId").references(UserData.id)
val roleId = integer("role").references(RolesData.id)
}
/**
* Database table declaring available roles
*/
object RolesData : Table() {
val id = integer("id").autoIncrement().primaryKey()
val role = varchar("roles", 16)
}
/**
* Database table storing general data/states
*/
object General : Table() {
val id = integer("id").autoIncrement().primaryKey()
val initialUse = integer("initialUse").default(1).primaryKey()
}
init {
// Create connection
TransactionManager.manager.defaultIsolationLevel = Connection.TRANSACTION_SERIALIZABLE
// Add tables
transaction {
SchemaUtils.createMissingTablesAndColumns(FileLocation, UserData, UserRoles, RolesData, General)
}
}
/**
* Creates the user in the database using username, password and the role
*/
fun createUser(usernameString: String, passwordString: String, roleString: String) {
transaction {
try {
val usersId = UserData.insert {
it[username] = usernameString
it[password] = BCrypt.withDefaults().hashToString(12, passwordString.toCharArray())
}[UserData.id]
UserRoles.insert { roles ->
roles[userId] = usersId!!
roles[roleId] = RolesData.select { RolesData.role eq roleString }.map { it[RolesData.id] }[0]
}
} catch (_: org.jetbrains.exposed.exceptions.ExposedSQLException) {
log.warning("User already exists!")
}
}
}
/**
* Tests whether the password [passwordString] of the user [usernameString] is correct
*/
fun checkUser(usernameString: String, passwordString: String): Boolean {
return transaction {
val passwordHash = UserData.select { UserData.username eq usernameString }.map { it[UserData.password] }[0]
BCrypt.verifyer().verify(passwordString.toCharArray(), passwordHash).verified
}
}
/**
* Returns the corresponding role using [usernameString]
*/
fun getRole(usernameString: String): Roles {
return transaction {
val userId = UserData.select { UserData.username eq usernameString }.map { it[UserData.id] }[0]
val userRoleId = UserRoles.select { UserRoles.userId eq userId }.map { it[UserRoles.roleId] }[0]
val userRole = RolesData.select { RolesData.id eq userRoleId }.map { it[RolesData.role] }[0]
if (userRole == "ADMIN") Roles.ADMIN else Roles.USER
}
}
/**
* Adds the uploaded file to the database
*/
fun addFile(fileLocation: String, usernameString: String) {
transaction {
try {
FileLocation.insert {
it[location] = fileLocation
it[username] = usernameString
}
} catch (_: org.jetbrains.exposed.exceptions.ExposedSQLException) {
log.warning("File already exists!")
}
}
}
/**
* Initializes the database
*/
fun initDatabase() {
val initialUseRow = transaction { General.selectAll().map { it[General.initialUse] } }
if (initialUseRow.isEmpty() || initialUseRow[0] == 1) {
transaction {
RolesData.insert {
it[role] = "ADMIN"
}
RolesData.insert {
it[role] = "USER"
}
RolesData.insert {
it[role] = "GUEST"
}
databaseController.createUser("melvin", "supersecure", "ADMIN")
UserRoles.insert {
it[userId] = 1
it[roleId] = 1
}
General.insert {
it[initialUse] = 0
}
}
} else {
log.info("Already initialized Database.")
}
}
}
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