# db.rs - source
Source of the Rust file `src/db.rs`.
Keywords: rust, rustlang, rust-lang

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    /*
     * Copyright (C) 2022  Aravinth Manivannan <realaravinth@batsense.net>
     *
     * This program is free software: you can redistribute it and/or modify
     * it under the terms of the GNU Affero General Public License as
     * published by the Free Software Foundation, either version 3 of the
     * License, or (at your option) any later version.
     *
     * This program is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     * GNU Affero General Public License for more details.
     *
     * You should have received a copy of the GNU Affero General Public License
     * along with this program.  If not, see <https://www.gnu.org/licenses/>.
     */
    use std::str::FromStr;

    use lazy_static::lazy_static;
    use serde::{Deserialize, Serialize};
    use sqlx::postgres::PgPoolOptions;
    use sqlx::types::time::OffsetDateTime;
    use sqlx::ConnectOptions;
    use sqlx::PgPool;
    use tracing::error;
    use uuid::Uuid;

    use crate::errors::*;

    /// Connect to databse
    pub enum ConnectionOptions {
        /// fresh connection
        Fresh(Fresh),
        /// existing connection
        Existing(Conn),
    }

    /// Use an existing database pool
    pub struct Conn(pub PgPool);

    pub struct Fresh {
        pub pool_options: PgPoolOptions,
        pub disable_logging: bool,
        pub url: String,
    }

    impl ConnectionOptions {
        async fn connect(self) -> ServiceResult<Database> {
            let pool = match self {
                Self::Fresh(fresh) => {
                    let mut connect_options =
                        sqlx::postgres::PgConnectOptions::from_str(&fresh.url).unwrap();
                    if fresh.disable_logging {
                        connect_options.disable_statement_logging();
                    }
                    sqlx::postgres::PgConnectOptions::from_str(&fresh.url)
                        .unwrap()
                        .disable_statement_logging();
                    fresh
                        .pool_options
                        .connect_with(connect_options)
                        .await
                        .unwrap()
                    //.map_err(|e| ServiceError::ServiceError(Box::new(e)))?
                }

                Self::Existing(conn) => conn.0,
            };
            Ok(Database { pool })
        }
    }

    #[derive(Clone)]
    pub struct Database {
        pub pool: PgPool,
    }

    impl Database {
        pub async fn migrate(&self) -> ServiceResult<()> {
            sqlx::migrate!("./migrations/")
                .run(&self.pool)
                .await
                .unwrap();
            //.map_err(|e| ServiceError::ServiceError(Box::new(e)))?;
            self.create_event_type().await?;
            Ok(())
        }

        pub async fn ping(&self) -> bool {
            use sqlx::Connection;

            if let Ok(mut con) = self.pool.acquire().await {
                con.ping().await.is_ok()
            } else {
                false
            }
        }

        /// register a new user
        pub async fn register(&self, p: &Register<'_>) -> ServiceResult<()> {
            sqlx::query!(
                "INSERT INTO librepages_users
                (name , password, email) VALUES ($1, $2, $3)",
                &p.username,
                &p.hash,
                &p.email,
            )
            .execute(&self.pool)
            .await
            .map_err(map_register_err)?;
            Ok(())
        }

        /// delete a user
        pub async fn delete_user(&self, username: &str) -> ServiceResult<()> {
            sqlx::query!("DELETE FROM librepages_users WHERE name = ($1)", username)
                .execute(&self.pool)
                .await
                .map_err(|e| map_row_not_found_err(e, ServiceError::AccountNotFound))?;
            Ok(())
        }

        /// check if username exists
        pub async fn username_exists(&self, username: &str) -> ServiceResult<bool> {
            let res = sqlx::query!(
                "SELECT EXISTS (SELECT 1 from librepages_users WHERE name = $1)",
                username,
            )
            .fetch_one(&self.pool)
            .await
            .map_err(map_register_err)?;

            let mut resp = false;
            if let Some(x) = res.exists {
                resp = x;
            }

            Ok(resp)
        }

        /// get user email
        pub async fn get_email(&self, username: &str) -> ServiceResult<String> {
            struct Email {
                email: String,
            }

            let res = sqlx::query_as!(
                Email,
                "SELECT email FROM librepages_users WHERE name = $1",
                username
            )
            .fetch_one(&self.pool)
            .await
            .map_err(|e| map_row_not_found_err(e, ServiceError::AccountNotFound))?;
            Ok(res.email)
        }

        /// check if email exists
        pub async fn email_exists(&self, email: &str) -> ServiceResult<bool> {
            let res = sqlx::query!(
                "SELECT EXISTS (SELECT 1 from librepages_users WHERE email = $1)",
                email
            )
            .fetch_one(&self.pool)
            .await
            .map_err(map_register_err)?;

            let mut resp = false;
            if let Some(x) = res.exists {
                resp = x;
            }

            Ok(resp)
        }

        /// update a user's email
        pub async fn update_email(&self, p: &UpdateEmail<'_>) -> ServiceResult<()> {
            sqlx::query!(
                "UPDATE librepages_users set email = $1
                WHERE name = $2",
                &p.new_email,
                &p.username,
            )
            .execute(&self.pool)
            .await
            .map_err(|e| map_row_not_found_err(e, ServiceError::AccountNotFound))?;

            Ok(())
        }

        /// get a user's password
        pub async fn get_password(&self, l: &Login<'_>) -> ServiceResult<NameHash> {
            struct Password {
                name: String,
                password: String,
            }

            let rec = match l {
                Login::Username(u) => sqlx::query_as!(
                    Password,
                    r#"SELECT name, password  FROM librepages_users WHERE name = ($1)"#,
                    u,
                )
                .fetch_one(&self.pool)
                .await
                .map_err(|e| map_row_not_found_err(e, ServiceError::AccountNotFound))?,
                Login::Email(e) => sqlx::query_as!(
                    Password,
                    r#"SELECT name, password  FROM librepages_users WHERE email = ($1)"#,
                    e,
                )
                .fetch_one(&self.pool)
                .await
                .map_err(|e| map_row_not_found_err(e, ServiceError::AccountNotFound))?,
            };

            let res = NameHash {
                hash: rec.password,
                username: rec.name,
            };

            Ok(res)
        }

        /// update user's password
        pub async fn update_password(&self, p: &NameHash) -> ServiceResult<()> {
            sqlx::query!(
                "UPDATE librepages_users set password = $1
                WHERE name = $2",
                &p.hash,
                &p.username,
            )
            .execute(&self.pool)
            .await
            .map_err(|e| map_row_not_found_err(e, ServiceError::AccountNotFound))?;

            Ok(())
        }

        /// update username
        pub async fn update_username(&self, current: &str, new: &str) -> ServiceResult<()> {
            sqlx::query!(
                "UPDATE librepages_users set name = $1
                WHERE name = $2",
                new,
                current,
            )
            .execute(&self.pool)
            .await
            .map_err(|e| map_row_not_found_err(e, ServiceError::AccountNotFound))?;

            Ok(())
        }

        pub async fn add_site(&self, msg: &Site) -> ServiceResult<()> {
            sqlx::query!(
                "
                INSERT INTO librepages_sites
                    (site_secret, repo_url, branch, hostname, pub_id, owned_by)
                VALUES ($1, $2, $3, $4, $5, ( SELECT ID FROM librepages_users WHERE name = $6 ));
                ",
                msg.site_secret,
                msg.repo_url,
                msg.branch,
                msg.hostname,
                msg.pub_id,
                msg.owner,
            )
            .execute(&self.pool)
            .await
            .map_err(|e| map_row_not_found_err(e, ServiceError::AccountNotFound))?;

            Ok(())
        }

        pub async fn get_site_from_pub_id(&self, pub_id: Uuid, owner: String) -> ServiceResult<Site> {
            struct S {
                repo_url: String,
                branch: String,
                hostname: String,
                owned_by: i32,
                site_secret: String,
            }

            let site = sqlx::query_as!(
                S,
                "SELECT repo_url, branch, hostname, owned_by, site_secret
                FROM librepages_sites
                WHERE pub_id = $1
                AND
                    owned_by = (SELECT ID from librepages_users WHERE name = $2)
                AND
                    deleted = false;
                ",
                &pub_id,
                &owner,
            )
            .fetch_one(&self.pool)
            .await
            .map_err(|e| map_row_not_found_err(e, ServiceError::WebsiteNotFound))?;

            let site = Site {
                site_secret: site.site_secret,
                branch: site.branch,
                hostname: site.hostname,
                owner,
                repo_url: site.repo_url,
                pub_id,
            };

            Ok(site)
        }

        pub async fn get_site_from_secret(&self, site_secret: &str) -> ServiceResult<Site> {
            struct S {
                repo_url: String,
                branch: String,
                hostname: String,
                owned_by: i32,
                pub_id: Uuid,
            }

            let site = sqlx::query_as!(
                S,
                "SELECT repo_url, branch, hostname, owned_by, pub_id
                FROM librepages_sites
                WHERE site_secret = $1
                AND deleted = false;
                ",
                site_secret,
            )
            .fetch_one(&self.pool)
            .await
            .map_err(|e| map_row_not_found_err(e, ServiceError::WebsiteNotFound))?;

            struct Owner {
                name: String,
            }
            let owner = sqlx::query_as!(
                Owner,
                "SELECT name FROM librepages_users WHERE ID = $1",
                site.owned_by
            )
            .fetch_one(&self.pool)
            .await
            .map_err(|e| map_row_not_found_err(e, ServiceError::WebsiteNotFound))?;

            let site = Site {
                site_secret: site_secret.to_owned(),
                branch: site.branch,
                hostname: site.hostname,
                owner: owner.name,
                repo_url: site.repo_url,
                pub_id: site.pub_id,
            };

            Ok(site)
        }

        pub async fn get_site(&self, owner: &str, hostname: &str) -> ServiceResult<Site> {
            let site = sqlx::query_as!(
                InnerSite,
                "SELECT site_secret, repo_url, branch, hostname, pub_id
                FROM librepages_sites
                WHERE deleted = false
                AND owned_by = (SELECT ID FROM librepages_users WHERE name = $1 )
                AND hostname = $2;
                ",
                owner,
                hostname
            )
            .fetch_one(&self.pool)
            .await
            .map_err(|e| map_row_not_found_err(e, ServiceError::WebsiteNotFound))?;

            let res = site.to_site(owner.into());

            Ok(res)
        }

        pub async fn list_all_sites(&self, owner: &str) -> ServiceResult<Vec<Site>> {
            let mut sites = sqlx::query_as!(
                InnerSite,
                "SELECT site_secret, repo_url, branch, hostname, pub_id
                FROM librepages_sites
                WHERE deleted = false
                AND owned_by = (SELECT ID FROM librepages_users WHERE name = $1 );
                ",
                owner,
            )
            .fetch_all(&self.pool)
            .await
            .map_err(|e| map_row_not_found_err(e, ServiceError::AccountNotFound))?;

            let res = sites.drain(0..).map(|s| s.to_site(owner.into())).collect();

            Ok(res)
        }

        pub async fn delete_site(&self, owner: &str, hostname: &str) -> ServiceResult<()> {
            sqlx::query!(
                "UPDATE librepages_sites SET deleted = true
                WHERE hostname = ($1)
                AND owned_by = ( SELECT ID FROM librepages_users WHERE name = $2);
                ",
                hostname,
                owner
            )
            .execute(&self.pool)
            .await
            .map_err(|e| map_row_not_found_err(e, ServiceError::WebsiteNotFound))?;
            Ok(())
        }

        /// check if hostname exists
        pub async fn hostname_exists(&self, hostname: &str) -> ServiceResult<bool> {
            let res = sqlx::query!(
                "SELECT EXISTS (SELECT 1 from librepages_sites WHERE hostname = $1 AND deleted = false)",
                hostname,
            )
            .fetch_one(&self.pool)
            .await
            .map_err(map_register_err)?;

            let mut resp = false;
            if let Some(x) = res.exists {
                resp = x;
            }

            Ok(resp)
        }

        /// check if event type exists
        async fn event_type_exists(&self, event: &Event) -> ServiceResult<bool> {
            let res = sqlx::query!(
                "SELECT EXISTS (SELECT 1 from librepages_deploy_event_type WHERE name = $1)",
                event.name,
            )
            .fetch_one(&self.pool)
            .await
            .map_err(map_register_err)?;

            let mut resp = false;
            if let Some(x) = res.exists {
                resp = x;
            }

            Ok(resp)
        }

        async fn create_event_type(&self) -> ServiceResult<()> {
            for e in &*EVENTS {
                if !self.event_type_exists(e).await? {
                    sqlx::query!(
                        "INSERT INTO librepages_deploy_event_type
                        (name) VALUES ($1) ON CONFLICT (name) DO NOTHING;",
                        e.name
                    )
                    .execute(&self.pool)
                    .await
                    .map_err(map_register_err)?;
                }
            }
            Ok(())
        }

        pub async fn log_event(&self, hostname: &str, event: &Event) -> ServiceResult<Uuid> {
            let now = now_unix_time_stamp();
            let uuid = Uuid::new_v4();

            sqlx::query!(
                "INSERT INTO librepages_site_deploy_events
                (event_type, time, site, pub_id) VALUES (
                    (SELECT iD from librepages_deploy_event_type WHERE name = $1),
                    $2,
                    (SELECT ID from librepages_sites WHERE hostname = $3),
                    $4
                );
                ",
                event.name,
                &now,
                hostname,
                uuid,
            )
            .execute(&self.pool)
            .await
            .map_err(map_register_err)?;
            Ok(uuid)
        }

        pub async fn get_event(
            &self,
            hostname: &str,
            event_id: &Uuid,
        ) -> ServiceResult<LibrePagesEvent> {
            let event = sqlx::query_as!(
                InnerLibrepagesEvent,
                "SELECT
                        librepages_deploy_event_type.name,
                        librepages_site_deploy_events.time,
                        librepages_site_deploy_events.pub_id
                    FROM
                        librepages_site_deploy_events
                    INNER JOIN librepages_deploy_event_type ON
                        librepages_deploy_event_type.ID = librepages_site_deploy_events.event_type
                    WHERE
                        librepages_site_deploy_events.site = (
                            SELECT ID FROM librepages_sites WHERE hostname = $1
                        )
                    AND
                        librepages_site_deploy_events.pub_id = $2
                    ",
                hostname,
                event_id,
            )
            .fetch_one(&self.pool)
            .await
            .map_err(|e| map_row_not_found_err(e, ServiceError::AccountNotFound))?;

            Ok(LibrePagesEvent {
                id: event.pub_id,
                time: event.time,
                event_type: Event::from_str(&event.name).unwrap(),
                site: hostname.to_owned(),
            })
        }

        pub async fn get_latest_update_event(
            &self,
            hostname: &str,
        ) -> ServiceResult<Option<LibrePagesEvent>> {
            self.get_latest_event_of_type(hostname, &EVENT_TYPE_UPDATE)
                .await
        }

        async fn get_latest_event_of_type(
            &self,
            hostname: &str,
            event_type: &Event,
        ) -> ServiceResult<Option<LibrePagesEvent>> {
            struct InnerLibrepagesEventNameless {
                time: OffsetDateTime,
                pub_id: Uuid,
            }

            let event = sqlx::query_as!(
                InnerLibrepagesEventNameless,
                "SELECT
                    time,
                    pub_id
                  FROM
                      librepages_site_deploy_events
                  WHERE
                      site = (SELECT ID FROM librepages_sites WHERE hostname = $1)
                  AND
                      event_type = (SELECT ID FROM librepages_deploy_event_type WHERE  name = $2)
                  AND
                      time = (
                          SELECT MAX(time)
                          FROM
                              librepages_site_deploy_events
                          WHERE
                              site = (SELECT ID FROM librepages_sites WHERE hostname = $1)
                          )
                    ",
                hostname,
                event_type.name
            )
            .fetch_one(&self.pool)
            .await;

            match event {
                Ok(event) => Ok(Some(LibrePagesEvent {
                    id: event.pub_id,
                    time: event.time,
                    event_type: event_type.clone(),
                    site: hostname.to_owned(),
                })),

                Err(sqlx::Error::RowNotFound) => Ok(None),
                Err(e) => Err(map_register_err(e)),
            }

            // map_row_not_found_err(e, ServiceError::AccountNotFound))?;
        }

        pub async fn list_all_site_events(
            &self,
            hostname: &str,
        ) -> ServiceResult<Vec<LibrePagesEvent>> {
            let mut inner_events = sqlx::query_as!(
                InnerLibrepagesEvent,
                "SELECT
                        librepages_deploy_event_type.name,
                        librepages_site_deploy_events.time,
                        librepages_site_deploy_events.pub_id
                    FROM
                        librepages_site_deploy_events
                    INNER JOIN librepages_deploy_event_type ON
                        librepages_deploy_event_type.ID = librepages_site_deploy_events.event_type
                    WHERE
                        librepages_site_deploy_events.site = (
                            SELECT ID FROM librepages_sites WHERE hostname = $1
                        );
                    ",
                hostname,
            )
            .fetch_all(&self.pool)
            .await
            .map_err(|e| map_row_not_found_err(e, ServiceError::AccountNotFound))?;

            let mut events = Vec::with_capacity(inner_events.len());

            for e in inner_events.drain(0..) {
                events.push(LibrePagesEvent {
                    id: e.pub_id,
                    time: e.time,
                    event_type: Event::from_str(&e.name).unwrap(),
                    site: hostname.to_owned(),
                })
            }
            Ok(events)
        }
    }
    struct InnerSite {
        site_secret: String,
        repo_url: String,
        branch: String,
        hostname: String,
        pub_id: Uuid,
    }

    impl InnerSite {
        fn to_site(self, owner: String) -> Site {
            Site {
                site_secret: self.site_secret,
                repo_url: self.repo_url,
                branch: self.branch,
                hostname: self.hostname,
                pub_id: self.pub_id,
                owner,
            }
        }
    }

    #[derive(Clone, Debug, Deserialize, Serialize, Eq, PartialEq)]
    /// Data required to add a new site
    pub struct Site {
        pub site_secret: String,
        pub repo_url: String,
        pub pub_id: Uuid,
        pub branch: String,
        pub hostname: String,
        pub owner: String,
    }

    #[derive(Clone, Debug, Deserialize, Serialize, Eq, PartialEq)]
    /// Data required to register a new user
    pub struct Register<'a> {
        /// username of new user
        pub username: &'a str,
        /// hashed password of new use
        pub hash: &'a str,
        /// Optionally, email of new use
        pub email: &'a str,
    }

    #[derive(Clone, Debug, Deserialize, Serialize, Eq, PartialEq)]
    /// data required to update them email of a user
    pub struct UpdateEmail<'a> {
        /// username of the user
        pub username: &'a str,
        /// new email address of the user
        pub new_email: &'a str,
    }

    #[derive(Clone, Debug, Deserialize, Serialize, Eq, PartialEq)]
    /// types of credentials used as identifiers during login
    pub enum Login<'a> {
        /// username as login
        Username(&'a str),
        /// email as login
        Email(&'a str),
    }

    #[derive(Clone, Debug, Deserialize, Serialize, Eq, PartialEq)]
    /// type encapsulating username and hashed password of a user
    pub struct NameHash {
        /// username
        pub username: String,
        /// hashed password
        pub hash: String,
    }

    #[derive(Deserialize, Serialize, Clone, Debug, Eq, PartialEq)]
    pub struct Event {
        pub name: String,
    }

    impl Event {
        fn new(name: String) -> Self {
            Self { name }
        }

        pub fn from_str(name: &str) -> Option<Event> {
            (*EVENTS).into_iter().find(|e| e.name == name).cloned()
        }
    }
    lazy_static! {
        pub static ref EVENT_TYPE_CREATE: Event = Event::new("site.event.create".into());
        pub static ref EVENT_TYPE_UPDATE: Event = Event::new("site.event.update".into());
        pub static ref EVENT_TYPE_DELETE: Event = Event::new("site.event.delete".into());
        pub static ref EVENTS: [&'static Event; 3] = [
            &*EVENT_TYPE_CREATE,
            &*EVENT_TYPE_DELETE,
            &*EVENT_TYPE_UPDATE
        ];
    }

    struct InnerLibrepagesEvent {
        name: String,
        time: OffsetDateTime,
        pub_id: Uuid,
    }

    #[derive(Clone, Debug, Eq, PartialEq)]
    pub struct LibrePagesEvent {
        pub event_type: Event,
        pub time: OffsetDateTime,
        pub site: String,
        pub id: Uuid,
    }

    fn now_unix_time_stamp() -> OffsetDateTime {
        OffsetDateTime::now_utc()
    }

    pub async fn get_db(settings: &crate::settings::Settings) -> Database {
        let pool_options = PgPoolOptions::new().max_connections(settings.database.pool);
        ConnectionOptions::Fresh(Fresh {
            pool_options,
            url: settings.database.url.clone(),
            disable_logging: !settings.debug,
        })
        .connect()
        .await
        .unwrap()
    }

    /// map custom row not found error to DB error
    pub fn map_row_not_found_err(e: sqlx::Error, row_not_found: ServiceError) -> ServiceError {
        if let sqlx::Error::RowNotFound = e {
            row_not_found
        } else {
            map_register_err(e)
        }
    }

    /// map postgres errors to [ServiceError](ServiceError) types
    fn map_register_err(e: sqlx::Error) -> ServiceError {
        use sqlx::Error;
        use std::borrow::Cow;

        if let Error::Database(err) = e {
            if err.code() == Some(Cow::from("23505")) {
                let msg = err.message();
                println!("{}", msg);
                if msg.contains("librepages_users_name_key") {
                    ServiceError::UsernameTaken
                } else if msg.contains("librepages_users_email_key") {
                    ServiceError::EmailTaken
                } else {
                    error!("{}", msg);
                    ServiceError::InternalServerError
                }
            } else {
                ServiceError::InternalServerError
            }
        } else {
            ServiceError::InternalServerError
        }
    }

    #[cfg(test)]
    mod tests {
        use std::collections::HashSet;

        use super::*;
        use crate::settings::Settings;

        #[test]
        fn event_names_are_unique() {
            let mut uniq = HashSet::new();
            assert!(EVENTS.into_iter().all(move |x| uniq.insert(x.name.clone())));
        }

        #[actix_rt::test]
        async fn db_works() {
            let settings = Settings::new().unwrap();
            let pool_options = PgPoolOptions::new().max_connections(1);
            let db = ConnectionOptions::Fresh(Fresh {
                pool_options,
                url: settings.database.url.clone(),
                disable_logging: !settings.debug,
            })
            .connect()
            .await
            .unwrap();
            assert!(db.ping().await);

            const EMAIL: &str = "postgresuser@foo.com";
            const EMAIL2: &str = "postgresuser2@foo.com";
            const NAME: &str = "postgresuser";
            const PASSWORD: &str = "pasdfasdfasdfadf";

            db.migrate().await.unwrap();
            let p = super::Register {
                username: NAME,
                email: EMAIL,
                hash: PASSWORD,
            };

            if db.username_exists(p.username).await.unwrap() {
                db.delete_user(p.username).await.unwrap();
                assert!(
                    !db.username_exists(p.username).await.unwrap(),
                    "user is deleted so username shouldn't exist"
                );
            }

            db.register(&p).await.unwrap();

            assert!(matches!(
                db.register(&p).await,
                Err(ServiceError::UsernameTaken)
            ));

            // testing get_password

            // with username
            let name_hash = db.get_password(&Login::Username(p.username)).await.unwrap();
            assert_eq!(name_hash.hash, p.hash, "user password matches");

            assert_eq!(name_hash.username, p.username, "username matches");

            // with email
            let mut name_hash = db.get_password(&Login::Email(p.email)).await.unwrap();
            assert_eq!(name_hash.hash, p.hash, "user password matches");
            assert_eq!(name_hash.username, p.username, "username matches");

            // testing get_email
            assert_eq!(db.get_email(p.username).await.unwrap(), p.email);

            // testing email exists
            assert!(
                db.email_exists(p.email).await.unwrap(),
                "user is registered so email should exist"
            );
            assert!(
                db.username_exists(p.username).await.unwrap(),
                "user is registered so username should exist"
            );

            // update password test. setting password = username
            name_hash.hash = name_hash.username.clone();
            db.update_password(&name_hash).await.unwrap();

            let name_hash = db.get_password(&Login::Username(p.username)).await.unwrap();
            assert_eq!(
                name_hash.hash, p.username,
                "user password matches with changed value"
            );
            assert_eq!(name_hash.username, p.username, "username matches");

            // update username to p.email
            assert!(
                !db.username_exists(p.email).await.unwrap(),
                "user with p.email doesn't exist. pre-check to update username to p.email"
            );
            db.update_username(p.username, p.email).await.unwrap();
            assert!(
                db.username_exists(p.email).await.unwrap(),
                "user with p.email exist post-update"
            );

            // testing update email
            let update_email = UpdateEmail {
                username: p.username,
                new_email: EMAIL2,
            };
            db.update_email(&update_email).await.unwrap();
            println!(
                "null user email: {}",
                db.email_exists(p.email).await.unwrap()
            );
            assert!(
                db.email_exists(p.email).await.unwrap(),
                "user was with empty email but email is set; so email should exist"
            );

            // deleting user
            db.delete_user(p.email).await.unwrap();
            assert!(
                !db.username_exists(p.email).await.unwrap(),
                "user is deleted so username shouldn't exist"
            );
        }

        #[actix_rt::test]
        pub async fn test_db_sites() {
            let settings = Settings::new().unwrap();
            let pool_options = PgPoolOptions::new().max_connections(1);
            let db = ConnectionOptions::Fresh(Fresh {
                pool_options,
                url: settings.database.url.clone(),
                disable_logging: !settings.debug,
            })
            .connect()
            .await
            .unwrap();
            assert!(db.ping().await);

            const EMAIL: &str = "postgresdbsiteuser@foo.com";
            const NAME: &str = "postgresdbsiteuser";
            const PASSWORD: &str = "pasdfasdfasdfadf";

            db.migrate().await.unwrap();

            // check if events are created
            for e in &*EVENTS {
                println!("Testing event type exists {}", e.name);
                assert!(db.event_type_exists(e).await.unwrap());
            }

            let p = super::Register {
                username: NAME,
                email: EMAIL,
                hash: PASSWORD,
            };

            if db.username_exists(p.username).await.unwrap() {
                db.delete_user(p.username).await.unwrap();
                assert!(
                    !db.username_exists(p.username).await.unwrap(),
                    "user is deleted so username shouldn't exist"
                );
            }

            db.register(&p).await.unwrap();

            let site = Site {
                site_secret: "foobar".into(),
                repo_url: "https://git.batsense.net/LibrePages/librepages.git".into(),
                branch: "librepages".into(),
                hostname: "db_works.tests.librepages.librepages.org".into(),
                pub_id: Uuid::new_v4(),
                owner: p.username.into(),
            };

            // test if hostname exists. Should be false
            assert!(!db.hostname_exists(&site.hostname).await.unwrap());

            // testing adding site
            db.add_site(&site).await.unwrap();

            // test if hostname exists. Should be true
            assert!(db.hostname_exists(&site.hostname).await.unwrap());

            // get site
            let db_site = db.get_site(p.username, &site.hostname).await.unwrap();
            assert_eq!(db_site, site);

            // get site by secret
            assert_eq!(
                db_site,
                db.get_site_from_secret(&site.site_secret).await.unwrap()
            );

            // list all sites owned by user
            let db_sites = db.list_all_sites(p.username).await.unwrap();
            assert_eq!(db_sites.len(), 1);
            assert_eq!(db_sites, vec![site.clone()]);

            // add event to site
            let event_id = db
                .log_event(&site.hostname, &EVENT_TYPE_CREATE)
                .await
                .unwrap();
            let event = db.get_event(&site.hostname, &event_id).await.unwrap();
            assert_eq!(event.id, event_id);
            assert_eq!(event.event_type, *EVENT_TYPE_CREATE);
            assert_eq!(event.site, site.hostname);

            assert_eq!(
                db.list_all_site_events(&site.hostname).await.unwrap(),
                vec![event]
            );

            // when no update event exist, None is returned
            assert!(db
                .get_latest_update_event(&site.hostname)
                .await
                .unwrap()
                .is_none());

            // add multiple update events, see if latest is returned
            db.log_event(&site.hostname, &EVENT_TYPE_UPDATE)
                .await
                .unwrap();
            let latest_update_event_id = db
                .log_event(&site.hostname, &EVENT_TYPE_UPDATE)
                .await
                .unwrap();
            let latest_update_event_id_from_db = db
                .get_latest_update_event(&site.hostname)
                .await
                .unwrap()
                .unwrap();
            assert_eq!(
                latest_update_event_id_from_db.event_type,
                *EVENT_TYPE_UPDATE
            );
            assert_eq!(latest_update_event_id_from_db.id, latest_update_event_id);

            // delete site
            db.delete_site(p.username, &site.hostname).await.unwrap();

            // test if hostname exists. Should be false
            assert!(!db.hostname_exists(&site.hostname).await.unwrap());
        }
    }