More updates, cranking out group db

modules/db/src/main/scala/gs/smolban/db/DbError.scala

@@ -1,5 +1,7 @@
 package gs.smolban.db
 
+import gs.slug.v0.Slug
+import gs.smolban.model.Group
 import gs.smolban.model.SmolbanError
 import gs.smolban.model.Ticket
 
@@ -17,4 +19,9 @@ object DbError:
     */
   case class TicketAlreadyExists(ref: Ticket.Reference) extends DbError
 
+  case class GroupAlreadyExists(
+    id: Group.Id,
+    slug: Slug
+  ) extends DbError
+
 end DbError

modules/db/src/main/scala/gs/smolban/db/GroupDb.scala

@@ -3,9 +3,33 @@ package gs.smolban.db
 import cats.data.EitherT
 import gs.smolban.model.Group
 
+/** Database interface for [[Group]].
+  */
 trait GroupDb[F[_]]:
+  /** Create a new [[Group]] in the database.
+    *
+    * @param group
+    *   The [[Group]] to store.
+    * @return
+    *   The [[Group]] that was stored, or an error.
+    */
   def createGroup(group: Group): EitherT[F, DbError, Group]
 
+  /** Read the specified [[Group]] from the database.
+    *
+    * @param id
+    *   The unique identifier of the [[Group]] to retrieve.
+    * @return
+    *   The [[Group]], or `None` if the specified ID does not exist.
+    */
   def readGroup(id: Group.Id): F[Option[Group]]
 
+  /** Delete the specified [[Group]]. Note that this operation deletes all
+    * [[Ticket]] associated with the group and should be used with care.
+    *
+    * @param id
+    *   The unique identifier of the [[Group]] to delete.
+    * @return
+    *   `true` if the group was deleted, `false` otherwise.
+    */
   def deleteGroup(id: Group.Id): F[Boolean]

modules/db/src/main/scala/gs/smolban/db/TicketDb.scala

@@ -3,6 +3,8 @@ package gs.smolban.db
 import cats.data.EitherT
 import gs.smolban.model.Ticket
 
+/** Database interface for [[Ticket]].
+  */
 trait TicketDb[F[_]]:
   /** Create a new [[Ticket]] in the database.
     *

modules/db/src/main/scala/gs/smolban/db/doobie/DoobieGroupDb.scala

@@ -0,0 +1,90 @@
+package gs.smolban.db.doobie
+
+import cats.MonadError
+import cats.data.EitherT
+import cats.syntax.all.*
+import doobie.*
+import doobie.implicits.*
+import gs.smolban.db.DbError
+import gs.smolban.db.GroupDb
+import gs.smolban.db.doobie.DoobieTypes.*
+import gs.smolban.model.CreatedAt
+import gs.smolban.model.Group
+
+final class DoobieGroupDb() extends GroupDb[ConnectionIO]:
+
+  import DoobieGroupDb.ErrorCodes
+  import DoobieGroupDb.Sql
+
+  /** @inheritdoc
+    */
+  override def createGroup(
+    group: Group
+  ): EitherT[ConnectionIO, DbError, Group] =
+    EitherT(
+      Sql.createGroup(group).run.attemptSql.flatMap {
+        case Left(ex) =>
+          if ErrorCodes.UniqueConstraintFailed.contains(ex.getErrorCode()) then
+            Left(
+              DbError.GroupAlreadyExists(group.id, group.slug)
+            ).pure[ConnectionIO]
+          else MonadError[ConnectionIO, Throwable].raiseError(ex)
+        case Right(_) =>
+          Right(group).pure[ConnectionIO]
+      }
+    )
+
+  /** @inheritdoc
+    */
+  override def readGroup(id: Group.Id): ConnectionIO[Option[Group]] =
+    Sql.readGroup(id).option
+
+  /** @inheritdoc
+    */
+  override def deleteGroup(id: Group.Id): ConnectionIO[Boolean] =
+    for
+      _    <- Sql.deleteAllTicketsForGroup(id).run
+      rows <- Sql.deleteGroup(id).run
+    yield rows > 0
+
+object DoobieGroupDb:
+
+  private object Sql:
+
+    def createGroup(group: Group): Update0 = sql"""
+    INSERT INTO groups (group_id, slug, created_at)
+    VALUES (${group.id}, ${group.slug}, ${group.createdAt})
+    """.update
+
+    def readGroup(groupId: Group.Id): Query0[Group] = sql"""
+    SELECT slug, created_at
+    FROM groups
+    WHERE group_id = $groupId
+    """.query[Group]
+
+    def deleteAllTicketsForGroup(groupId: Group.Id): Update0 = sql"""
+    DELETE FROM tickets
+    WHERE group_id = $groupId
+    """.update
+
+    def deleteGroup(groupId: Group.Id): Update0 = sql"""
+    DELETE FROM groups
+    WHERE group_id = $groupId
+    """.update
+
+  end Sql
+
+  object ErrorCodes:
+
+    val UniqueConstraintFailed: List[Int] =
+      List(Sqlite.UniqueConstraintFailed)
+
+    object Sqlite:
+
+      val UniqueConstraintFailed: Int = 2067
+
+    end Sqlite
+
+  end ErrorCodes
+
+end DoobieGroupDb

modules/db/src/main/scala/gs/smolban/db/doobie/DoobieTicketDb.scala

@@ -8,10 +8,8 @@ import gs.smolban.db.DbError
 import gs.smolban.db.TicketDb
 import gs.smolban.db.doobie.DoobieTypes.*
 import gs.smolban.model.CreatedAt
-import gs.smolban.model.CreatedBy
 import gs.smolban.model.Group
 import gs.smolban.model.Ticket
-import gs.smolban.model.users.User
 
 final class DoobieTicketDb[F[_]: Async](
   val xa: Transactor[F]
@@ -46,11 +44,9 @@ object DoobieTicketDb:
 
     case class TicketContents(
       createdAt: CreatedAt,
-      createdBy: CreatedBy,
       title: String,
       description: String,
-      status: Ticket.Status,
-      assignee: Option[User.Id]
+      status: Ticket.Status
     )
 
     // TODO: figure out how to read tags

modules/db/src/main/scala/gs/smolban/db/doobie/DoobieTypes.scala

@@ -2,11 +2,10 @@ package gs.smolban.db.doobie
 
 import DoobieTypes.ErrorMessages
 import doobie.*
+import gs.slug.v0.Slug
 import gs.smolban.model.CreatedAt
-import gs.smolban.model.CreatedBy
 import gs.smolban.model.Group
 import gs.smolban.model.Ticket
-import gs.smolban.model.users.User
 import gs.uuid.v0.UUID
 import gs.uuid.v0.UUIDFormat
 
@@ -34,27 +33,21 @@ trait DoobieTypes:
   implicit val groupIdPut: Put[Group.Id] =
     Put[Array[Byte]].tcontramap(id => UUIDFormat.toBytes(id.toUUID().toUUID()))
 
-  implicit val userIdGet: Get[User.Id] =
-    Get[Array[Byte]].tmap(bytes => User.Id(UUID(UUIDFormat.fromBytes(bytes))))
-
-  implicit val userIdPut: Put[User.Id] =
-    Put[Array[Byte]].tcontramap(id => UUIDFormat.toBytes(id.toUUID().toUUID()))
-
   implicit val createdAtGet: Get[CreatedAt] =
     Get[Long].tmap(CreatedAt.fromMilliseconds)
 
   implicit val createdAtPut: Put[CreatedAt] =
     Put[Long].tcontramap(_.toMilliseconds())
 
-  implicit val createdByGet: Get[CreatedBy] =
-    Get[Array[Byte]].tmap(bytes =>
-      CreatedBy(User.Id(UUID(UUIDFormat.fromBytes(bytes))))
-    )
+  implicit val slugGet: Get[Slug] =
+    Get[String].temap { slug =>
+      Slug.validate(slug) match
+        case None    => Left(ErrorMessages.invalidSlug(slug))
+        case Some(s) => Right(s)
+    }
 
-  implicit val createdByPut: Put[CreatedBy] =
-    Put[Array[Byte]].tcontramap(id =>
-      UUIDFormat.toBytes(id.toUserId().toUUID().toUUID())
-    )
+  implicit val slugPut: Put[Slug] =
+    Put[String].tcontramap(_.str())
 
 object DoobieTypes extends DoobieTypes:
 
@@ -63,6 +56,9 @@ object DoobieTypes extends DoobieTypes:
     def invalidTicketStatus(candidate: String): String =
       s"'$candidate' is not a valid ticket status."
 
+    def invalidSlug(candidate: String): String =
+      s"'$candidate' is not a valid Group slug."
+
   end ErrorMessages
 
 end DoobieTypes