1 files changed, 173 insertions, 0 deletions
diff --git a/crates/atuin-server-database/src/lib.rs b/crates/atuin-server-database/src/lib.rs
new file mode 100644
index 00000000..d2c16b3d
--- /dev/null
+++ b/crates/atuin-server-database/src/lib.rs
@@ -0,0 +1,173 @@
+#![forbid(unsafe_code)]
+
+pub mod calendar;
+pub mod models;
+
+use std::{
+    collections::HashMap,
+    fmt::{Debug, Display},
+    ops::Range,
+};
+
+use self::{
+    calendar::{TimePeriod, TimePeriodInfo},
+    models::{History, NewHistory, NewSession, NewUser, Session, User},
+};
+use async_trait::async_trait;
+use atuin_common::record::{EncryptedData, HostId, Record, RecordIdx, RecordStatus};
+use serde::{de::DeserializeOwned, Serialize};
+use time::{Date, Duration, Month, OffsetDateTime, Time, UtcOffset};
+use tracing::instrument;
+
+#[derive(Debug)]
+pub enum DbError {
+    NotFound,
+    Other(eyre::Report),
+}
+
+impl Display for DbError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{self:?}")
+    }
+}
+
+impl<T: std::error::Error + Into<time::error::Error>> From<T> for DbError {
+    fn from(value: T) -> Self {
+        DbError::Other(value.into().into())
+    }
+}
+
+impl std::error::Error for DbError {}
+
+pub type DbResult<T> = Result<T, DbError>;
+
+#[async_trait]
+pub trait Database: Sized + Clone + Send + Sync + 'static {
+    type Settings: Debug + Clone + DeserializeOwned + Serialize + Send + Sync + 'static;
+    async fn new(settings: &Self::Settings) -> DbResult<Self>;
+
+    async fn get_session(&self, token: &str) -> DbResult<Session>;
+    async fn get_session_user(&self, token: &str) -> DbResult<User>;
+    async fn add_session(&self, session: &NewSession) -> DbResult<()>;
+
+    async fn get_user(&self, username: &str) -> DbResult<User>;
+    async fn get_user_session(&self, u: &User) -> DbResult<Session>;
+    async fn add_user(&self, user: &NewUser) -> DbResult<i64>;
+    async fn update_user_password(&self, u: &User) -> DbResult<()>;
+
+    async fn total_history(&self) -> DbResult<i64>;
+    async fn count_history(&self, user: &User) -> DbResult<i64>;
+    async fn count_history_cached(&self, user: &User) -> DbResult<i64>;
+
+    async fn delete_user(&self, u: &User) -> DbResult<()>;
+    async fn delete_history(&self, user: &User, id: String) -> DbResult<()>;
+    async fn deleted_history(&self, user: &User) -> DbResult<Vec<String>>;
+    async fn delete_store(&self, user: &User) -> DbResult<()>;
+
+    async fn add_records(&self, user: &User, record: &[Record<EncryptedData>]) -> DbResult<()>;
+    async fn next_records(
+        &self,
+        user: &User,
+        host: HostId,
+        tag: String,
+        start: Option<RecordIdx>,
+        count: u64,
+    ) -> DbResult<Vec<Record<EncryptedData>>>;
+
+    // Return the tail record ID for each store, so (HostID, Tag, TailRecordID)
+    async fn status(&self, user: &User) -> DbResult<RecordStatus>;
+
+    async fn count_history_range(&self, user: &User, range: Range<OffsetDateTime>)
+        -> DbResult<i64>;
+
+    async fn list_history(
+        &self,
+        user: &User,
+        created_after: OffsetDateTime,
+        since: OffsetDateTime,
+        host: &str,
+        page_size: i64,
+    ) -> DbResult<Vec<History>>;
+
+    async fn add_history(&self, history: &[NewHistory]) -> DbResult<()>;
+
+    async fn oldest_history(&self, user: &User) -> DbResult<History>;
+
+    #[instrument(skip_all)]
+    async fn calendar(
+        &self,
+        user: &User,
+        period: TimePeriod,
+        tz: UtcOffset,
+    ) -> DbResult<HashMap<u64, TimePeriodInfo>> {
+        let mut ret = HashMap::new();
+        let iter: Box<dyn Iterator<Item = DbResult<(u64, Range<Date>)>> + Send> = match period {
+            TimePeriod::Year => {
+                // First we need to work out how far back to calculate. Get the
+                // oldest history item
+                let oldest = self
+                    .oldest_history(user)
+                    .await?
+                    .timestamp
+                    .to_offset(tz)
+                    .year();
+                let current_year = OffsetDateTime::now_utc().to_offset(tz).year();
+
+                // All the years we need to get data for
+                // The upper bound is exclusive, so include current +1
+                let years = oldest..current_year + 1;
+
+                Box::new(years.map(|year| {
+                    let start = Date::from_calendar_date(year, time::Month::January, 1)?;
+                    let end = Date::from_calendar_date(year + 1, time::Month::January, 1)?;
+
+                    Ok((year as u64, start..end))
+                }))
+            }
+
+            TimePeriod::Month { year } => {
+                let months =
+                    std::iter::successors(Some(Month::January), |m| Some(m.next())).take(12);
+
+                Box::new(months.map(move |month| {
+                    let start = Date::from_calendar_date(year, month, 1)?;
+                    let days = time::util::days_in_year_month(year, month);
+                    let end = start + Duration::days(days as i64);
+
+                    Ok((month as u64, start..end))
+                }))
+            }
+
+            TimePeriod::Day { year, month } => {
+                let days = 1..time::util::days_in_year_month(year, month);
+                Box::new(days.map(move |day| {
+                    let start = Date::from_calendar_date(year, month, day)?;
+                    let end = start
+                        .next_day()
+                        .ok_or_else(|| DbError::Other(eyre::eyre!("no next day?")))?;
+
+                    Ok((day as u64, start..end))
+                }))
+            }
+        };
+
+        for x in iter {
+            let (index, range) = x?;
+
+            let start = range.start.with_time(Time::MIDNIGHT).assume_offset(tz);
+            let end = range.end.with_time(Time::MIDNIGHT).assume_offset(tz);
+
+            let count = self.count_history_range(user, start..end).await?;
+
+            ret.insert(
+                index,
+                TimePeriodInfo {
+                    count: count as u64,
+                    hash: "".to_string(),
+                },
+            );
+        }
+
+        Ok(ret)
+    }
+}