neiam /fieri-forever

//! The lunch domain: areas, restaurants, per-person rankings, and the lunch
//! history the suggester uses to avoid repeats.
//!
//! An *area* is a region restaurants are grouped under — the home office, or a
//! city someone is travelling to. Suggestions are always made within one area.
use sea_orm_migration::prelude::*;

#[derive(DeriveMigrationName)]
pub struct Migration;

#[async_trait::async_trait]
impl MigrationTrait for Migration {
    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
        manager
            .create_table(
                Table::create()
                    .table(Areas::Table)
                    .if_not_exists()
                    .col(ColumnDef::new(Areas::Id).uuid().not_null().primary_key())
                    .col(ColumnDef::new(Areas::Name).string_len(100).unique_key().not_null())
                    .col(ColumnDef::new(Areas::Lat).double().not_null())
                    .col(ColumnDef::new(Areas::Lon).double().not_null())
                    .col(ColumnDef::new(Areas::Zoom).integer().not_null().default(15))
                    .col(ColumnDef::new(Areas::CreatedBy).uuid().null())
                    .col(
                        ColumnDef::new(Areas::CreatedAt)
                            .timestamp_with_time_zone()
                            .not_null()
                            .default(Expr::current_timestamp()),
                    )
                    .foreign_key(
                        ForeignKey::create()
                            .name("fk_areas_created_by")
                            .from(Areas::Table, Areas::CreatedBy)
                            .to(Users::Table, Users::Id)
                            .on_delete(ForeignKeyAction::SetNull),
                    )
                    .to_owned(),
            )
            .await?;

        manager
            .create_table(
                Table::create()
                    .table(Restaurants::Table)
                    .if_not_exists()
                    .col(ColumnDef::new(Restaurants::Id).uuid().not_null().primary_key())
                    .col(ColumnDef::new(Restaurants::AreaId).uuid().not_null())
                    .col(ColumnDef::new(Restaurants::Name).string_len(255).not_null())
                    // N123 / W123 / R123, as the OSM API spells it. Null for a
                    // hand-dropped pin that isn't in OSM.
                    .col(ColumnDef::new(Restaurants::OsmRef).string_len(32).null())
                    .col(ColumnDef::new(Restaurants::Lat).double().not_null())
                    .col(ColumnDef::new(Restaurants::Lon).double().not_null())
                    .col(ColumnDef::new(Restaurants::Cuisine).string_len(255).null())
                    .col(ColumnDef::new(Restaurants::Address).string_len(255).null())
                    .col(ColumnDef::new(Restaurants::Website).string_len(512).null())
                    .col(ColumnDef::new(Restaurants::Notes).text().not_null().default(""))
                    .col(ColumnDef::new(Restaurants::Archived).boolean().not_null().default(false))
                    .col(ColumnDef::new(Restaurants::AddedBy).uuid().null())
                    .col(
                        ColumnDef::new(Restaurants::CreatedAt)
                            .timestamp_with_time_zone()
                            .not_null()
                            .default(Expr::current_timestamp()),
                    )
                    .foreign_key(
                        ForeignKey::create()
                            .name("fk_restaurants_area_id")
                            .from(Restaurants::Table, Restaurants::AreaId)
                            .to(Areas::Table, Areas::Id)
                            .on_delete(ForeignKeyAction::Cascade),
                    )
                    .foreign_key(
                        ForeignKey::create()
                            .name("fk_restaurants_added_by")
                            .from(Restaurants::Table, Restaurants::AddedBy)
                            .to(Users::Table, Users::Id)
                            .on_delete(ForeignKeyAction::SetNull),
                    )
                    .to_owned(),
            )
            .await?;

        manager
            .create_index(
                Index::create()
                    .name("idx_restaurants_area_id")
                    .table(Restaurants::Table)
                    .col(Restaurants::AreaId)
                    .to_owned(),
            )
            .await?;

        // One OSM element is one restaurant; adding it twice is a duplicate.
        // Postgres treats NULLs as distinct, so custom pins are unaffected.
        manager
            .create_index(
                Index::create()
                    .name("idx_restaurants_osm_ref")
                    .table(Restaurants::Table)
                    .col(Restaurants::OsmRef)
                    .unique()
                    .to_owned(),
            )
            .await?;

        manager
            .create_table(
                Table::create()
                    .table(Rankings::Table)
                    .if_not_exists()
                    .col(ColumnDef::new(Rankings::UserId).uuid().not_null())
                    .col(ColumnDef::new(Rankings::RestaurantId).uuid().not_null())
                    // always | positive | neutral | never
                    .col(ColumnDef::new(Rankings::Rank).string_len(16).not_null())
                    .col(
                        ColumnDef::new(Rankings::UpdatedAt)
                            .timestamp_with_time_zone()
                            .not_null()
                            .default(Expr::current_timestamp()),
                    )
                    .primary_key(Index::create().col(Rankings::UserId).col(Rankings::RestaurantId))
                    .foreign_key(
                        ForeignKey::create()
                            .name("fk_rankings_user_id")
                            .from(Rankings::Table, Rankings::UserId)
                            .to(Users::Table, Users::Id)
                            .on_delete(ForeignKeyAction::Cascade),
                    )
                    .foreign_key(
                        ForeignKey::create()
                            .name("fk_rankings_restaurant_id")
                            .from(Rankings::Table, Rankings::RestaurantId)
                            .to(Restaurants::Table, Restaurants::Id)
                            .on_delete(ForeignKeyAction::Cascade),
                    )
                    .to_owned(),
            )
            .await?;

        manager
            .create_table(
                Table::create()
                    .table(Lunches::Table)
                    .if_not_exists()
                    .col(ColumnDef::new(Lunches::Id).uuid().not_null().primary_key())
                    .col(ColumnDef::new(Lunches::RestaurantId).uuid().not_null())
                    .col(ColumnDef::new(Lunches::WentOn).date().not_null())
                    .col(ColumnDef::new(Lunches::LoggedBy).uuid().null())
                    .col(
                        ColumnDef::new(Lunches::CreatedAt)
                            .timestamp_with_time_zone()
                            .not_null()
                            .default(Expr::current_timestamp()),
                    )
                    .foreign_key(
                        ForeignKey::create()
                            .name("fk_lunches_restaurant_id")
                            .from(Lunches::Table, Lunches::RestaurantId)
                            .to(Restaurants::Table, Restaurants::Id)
                            .on_delete(ForeignKeyAction::Cascade),
                    )
                    .foreign_key(
                        ForeignKey::create()
                            .name("fk_lunches_logged_by")
                            .from(Lunches::Table, Lunches::LoggedBy)
                            .to(Users::Table, Users::Id)
                            .on_delete(ForeignKeyAction::SetNull),
                    )
                    .to_owned(),
            )
            .await?;

        manager
            .create_index(
                Index::create()
                    .name("idx_lunches_restaurant_went_on")
                    .table(Lunches::Table)
                    .col(Lunches::RestaurantId)
                    .col(Lunches::WentOn)
                    .to_owned(),
            )
            .await?;

        manager
            .create_table(
                Table::create()
                    .table(LunchAttendees::Table)
                    .if_not_exists()
                    .col(ColumnDef::new(LunchAttendees::LunchId).uuid().not_null())
                    .col(ColumnDef::new(LunchAttendees::UserId).uuid().not_null())
                    .primary_key(
                        Index::create().col(LunchAttendees::LunchId).col(LunchAttendees::UserId),
                    )
                    .foreign_key(
                        ForeignKey::create()
                            .name("fk_lunch_attendees_lunch_id")
                            .from(LunchAttendees::Table, LunchAttendees::LunchId)
                            .to(Lunches::Table, Lunches::Id)
                            .on_delete(ForeignKeyAction::Cascade),
                    )
                    .foreign_key(
                        ForeignKey::create()
                            .name("fk_lunch_attendees_user_id")
                            .from(LunchAttendees::Table, LunchAttendees::UserId)
                            .to(Users::Table, Users::Id)
                            .on_delete(ForeignKeyAction::Cascade),
                    )
                    .to_owned(),
            )
            .await?;

        Ok(())
    }

    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
        for table in [
            LunchAttendees::Table.into_iden(),
            Lunches::Table.into_iden(),
            Rankings::Table.into_iden(),
            Restaurants::Table.into_iden(),
            Areas::Table.into_iden(),
        ] {
            manager.drop_table(Table::drop().table(table).to_owned()).await?;
        }
        Ok(())
    }
}

#[derive(DeriveIden)]
enum Users {
    Table,
    Id,
}

#[derive(DeriveIden)]
enum Areas {
    Table,
    Id,
    Name,
    Lat,
    Lon,
    Zoom,
    CreatedBy,
    CreatedAt,
}

#[derive(DeriveIden)]
enum Restaurants {
    Table,
    Id,
    AreaId,
    Name,
    OsmRef,
    Lat,
    Lon,
    Cuisine,
    Address,
    Website,
    Notes,
    Archived,
    AddedBy,
    CreatedAt,
}

#[derive(DeriveIden)]
enum Rankings {
    Table,
    UserId,
    RestaurantId,
    Rank,
    UpdatedAt,
}

#[derive(DeriveIden)]
enum Lunches {
    Table,
    Id,
    RestaurantId,
    WentOn,
    LoggedBy,
    CreatedAt,
}

#[derive(DeriveIden)]
enum LunchAttendees {
    Table,
    LunchId,
    UserId,
}