Struct ServerOutbox 

pub struct ServerOutbox {
    pub conn: Connection,
}

Access to the outbox table.

Fields

conn: Connection

Implementations

impl ServerOutbox

pub fn new() -> Result<Self>

Opens the database and ensures the outbox table exists.

pub fn enqueue(&mut self, date: NaiveDate, error: &str) -> Result<()>

Records date as owed, or notes another failed attempt at it.

Safe to call for a date already queued: the row is updated rather than duplicated.

pub fn pending(&self) -> Result<Vec<OwedDay>>

Every day still owed, oldest first.

Oldest first because a backlog is delivered in the order it happened: a dashboard filling in from the far end reads as a machine catching up, one filling in at random reads as a machine malfunctioning.

pub fn count(&self) -> Result<i64>

How many days are owed.

pub fn remove(&mut self, date: NaiveDate) -> Result<bool>

Forgets date, whether it was delivered or given up on.

One method for both outcomes on purpose: the queue’s business is whether a day is still owed, and a day the server will never accept is no more owed than one it has taken. Which of the two happened is said out loud by the caller, where the user can see it.