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use anyhow::{Context, Result};
use diesel::{dsl::sum, QueryDsl, RunQueryDsl, SelectableHelper, SqliteConnection};
use schist_models::transaction_categorisation::TransactionCategorisation;
use schist_schema::schema::transaction_categorisations::{
self as transaction_categorisations_schema,
dsl::transaction_categorisations as transaction_categorisations_table,
};
pub fn delete_all_transaction_categorisations(connection: &mut SqliteConnection) -> Result<usize> {
let num_rows_deleted = diesel::delete(transaction_categorisations_table)
.execute(connection)
.with_context(|| "failed to delete all transaction categorisations")?;
Ok(num_rows_deleted)
}
pub fn get_all_transaction_categorisations(connection: &mut SqliteConnection) -> Result<Vec<TransactionCategorisation>> {
let all_transaction_categorisations = transaction_categorisations_table
.select(TransactionCategorisation::as_select())
.load(connection)
.with_context(|| "failed to get all transaction categorisations")?;
Ok(all_transaction_categorisations)
}
pub fn insert_transaction_categorisations(
transaction_categorisations: &[TransactionCategorisation],
connection: &mut SqliteConnection,
) -> Result<usize> {
let num_rows_inserted = diesel::insert_into(transaction_categorisations_table)
.values(transaction_categorisations)
.execute(connection)
.with_context(|| insert_err_msg(&transaction_categorisations))?;
Ok(num_rows_inserted)
}
fn insert_err_msg(transaction_categorisations: &[TransactionCategorisation]) -> String {
format!(
"failed to insert transaction categorisations: [{}]",
transaction_categorisations
.iter()
.map(|tc| tc.id.to_string())
.collect::<Vec<String>>()
.join(", ")
)
}
pub fn sum_transaction_categorisation_quantity_per_category_id(
connection: &mut SqliteConnection,
) -> Result<Vec<(i32, i64)>> {
let sum = transaction_categorisations_table
.group_by(transaction_categorisations_schema::category_id)
.select((
transaction_categorisations_schema::category_id,
sum(transaction_categorisations_schema::quantity),
))
.load::<(i32, Option<i64>)>(connection)
.map(|vec| vec.iter().map(|(category_id, sum)| (*category_id, sum.unwrap_or(0))).collect())
.with_context(|| "failed to sum transaction categorisation quantity per category ID")?;
Ok(sum)
}
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