Db, first commit of work

This also touches atproto/src/lib.rs which may be a problem for the
rebase~

Adds migrations and all the other stuff.

db/src/interfaces/mod.rs

@@ -0,0 +1 @@
+pub mod spoor;

db/src/interfaces/spoor.rs

@@ -0,0 +1,178 @@
+use crate::Error;
+use atproto::{
+  Cid,
+  Uri,
+  Datetime,
+  Did,
+  StrongRef,
+  Handle,
+};
+use sqlx::{
+  PgTransaction,
+  PgPool,
+  query,
+};
+
+pub struct Activity {
+  pub authority: Uri,
+  
+  pub cid: Option<Cid>,
+  pub session: Option<StrongRef<Session>>,
+  pub progress: Option<Progress>,
+  pub performed_at: Option<Datetime>,
+  pub created_at: Option<Datetime>,
+}
+
+pub struct Session {
+  pub uri: Uri,
+  
+  pub cid: Option<Cid>,
+  pub content: Option<StrongRef<Content>>,
+  pub label: Option<String>,
+  pub created_at: Option<Datetime>,
+  pub other_participants: Option<Vec<Participant>>,
+}
+
+pub struct User {
+  pub did: Did,
+  pub handle: Option<Handle>,
+}
+
+#[non_exhaustive]
+pub enum Participant {
+  Owner(User),
+  Added(User),
+}
+
+#[non_exhaustive]
+pub enum Content {
+  UnknownContent
+}
+
+#[non_exhaustive]
+pub enum Progress {
+  UnknownProgress
+}
+
+pub async fn ingest_session(
+  db: PgPool, session: Session
+) -> Result<(), Error>  {
+  let mut transaction = db.begin().await?;
+  write_session(&mut transaction, session).await?;
+  transaction.commit().await.map_err(Error::Backend)
+}
+
+async fn write_session(
+  tr: &mut PgTransaction<'_>, session: Session
+) -> Result<(), Error> {
+
+  let (contenturi, contentcid): (Option<Content>, String) =
+    match session.content {
+    Some(sr) => (Some(sr.content), sr.cid.to_string()),
+    None => (None, "".to_string()),
+  };
+
+  query!(r#"
+    INSERT INTO sessions(
+      sessionuri, sessioncid, label, created_at, contenturi, contentcid
+    ) VALUES ($1, $2, $3, $4, $5, $6)
+  "#,
+    session.uri,
+    session.cid.map_or("", |cid| cid.to_string()),
+    session.label.unwrap_or(""),
+    session.created_at.map_or("", |dt| (*dt.as_str()).to_string()),
+    contenturi,
+    contentcid,
+  ).execute(&mut tr).await?;
+
+  session.other_participants.and_then(|participants| {
+    for participant in participants {
+      write_participant(tr, participant, session.uri).await?
+    }
+  }).unwrap_or(Ok(()))
+}
+
+async fn write_participant(
+  tr: &mut PgTransaction<'_>, participant: Participant, sessionuri: Uri
+) -> Result<(), Error> {
+  let (participantType, user): (String, User) = match participant {
+    Participant::Owner(user) => ("Owner".to_string(), user),
+    Participant::Added(user) => ("Participant".to_string(), user),
+  };
+
+  query!(r#"
+    INSERT INTO participants(
+    sessionuri, userdid, role
+    ) VALUES ($1, $2, $3)
+  "#, sessionuri.to_string(), user.did.to_string, participantType
+  ).execute(&mut tr).await?;
+  
+  Ok(())
+}
+
+// pub fn injest_activity(db: PgPool, activity: Activity) -> Result<(), Error>  {
+//     todo!();
+// }
+//
+//   let mut transaction = db.begin().await?;
+//
+//   query!(r#"
+//       INSERT INTO sessions(sessionuri, label) VALUES ($1, $2)
+//     "#,
+//     session.sessionuri, session.label
+//   ).execute(&mut *transaction).await?;
+//   
+//   for participant in session.participants {
+//     query!(r#"
+//         INSERT INTO participants(sessionuri, userdid, role) VALUES ($1, $2, $3)
+//       "#,
+//       session.sessionuri, participant.userdid, participant.role.to_string()
+//     ).execute(&mut *transaction).await?;
+//   }
+//
+//   transaction.commit().await
+// }
+//
+// pub async fn ingest_participant(db: PgPool, participant: Participant) -> Result<(), Error>  {
+//   query!(r#"
+//       INSERT INTO sessions(sessionuri, label) VALUES ($1, $2)
+//     "#,
+//     session.sessionuri, session.label
+//   ).execute(&mut *transaction).await?;
+//   
+//   for participant in session.participants {
+//     query!(r#"
+//         INSERT INTO participants(sessionuri, userdid, role) VALUES ($1, $2, $3)
+//       "#,
+//       session.sessionuri, participant.userdid, participant.role.to_string()
+//     ).execute(&mut *transaction).await?;
+//   }
+//
+//   transaction.commit().await
+// }
+//
+
+  // pub async fn add_user(&self, user: &User) -> Result<()> {
+  //   query!(r#"
+  //       INSERT INTO users(userdid, handle) VALUES ($1, $2)
+  //     "#,
+  //     user.userdid, user.handle
+  //   ).execute(self.pool).await?;
+  //   Ok(())
+  // }
+  //
+  // pub async fn add_session(&self, session: &Session) -> Result<()> {
+  // }
+  //
+  // pub async fn add_participant(&self, session: Session, 
+  //   participant: Participant) -> Result<Session> {
+  //   query!(r#"
+  //       INSERT INTO participants(sessionuri, userdid, role) VALUES ($1, $2, $3)
+  //     "#,
+  //     session.sessionuri, participant.userdid, participant.role.to_string()
+  //   ).execute(self.pool).await?;
+  //   
+  //   session.participants.push(participant);
+  //
+  //   Ok(session)
+  // }