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|
use crate::storage::db::{
insert::{Committable, Operations},
subscription::{Subscription, Subscriptions},
};
use anyhow::Result;
use serde::{Deserialize, Serialize};
use sqlx::query;
#[derive(Debug, Serialize, Deserialize)]
pub(crate) enum Operation {
Add(Subscription),
Remove(Subscription),
}
impl Committable for Operation {
async fn commit(self, txn: &mut sqlx::SqliteConnection) -> Result<()> {
match self {
Operation::Add(subscription) => {
let url = subscription.url.as_str();
query!(
"
INSERT INTO subscriptions (
name,
url
) VALUES (?, ?);
",
subscription.name,
url
)
.execute(txn)
.await?;
println!(
"Subscribed to '{}' at '{}'",
subscription.name, subscription.url
);
Ok(())
}
Operation::Remove(subscription) => {
let output = query!(
"
DELETE FROM subscriptions
WHERE name = ?
",
subscription.name,
)
.execute(txn)
.await?;
assert_eq!(
output.rows_affected(),
1,
"The removed subscription query did effect more (or less) than one row. This is a bug."
);
println!(
"Unsubscribed from '{}' at '{}'",
subscription.name, subscription.url
);
Ok(())
}
}
}
}
impl Subscription {
pub(crate) fn add(self, ops: &mut Operations<Operation>) {
ops.push(Operation::Add(self));
}
pub(crate) fn remove(self, ops: &mut Operations<Operation>) {
ops.push(Operation::Remove(self));
}
}
impl Subscriptions {
pub(crate) fn remove(self, ops: &mut Operations<Operation>) {
for sub in self.0.into_values() {
ops.push(Operation::Remove(sub));
}
}
}
|
