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use anyhow::{Context, Result};
use diesel::{dsl::sum, QueryDsl, RunQueryDsl, SelectableHelper, SqliteConnection};
use schist_schema::schema::category_transfers::{
self as category_transfers_schema,
dsl::category_transfers as category_transfers_table,
};
use schist_models::category_transfer::CategoryTransfer;
pub fn delete_all_category_transfers(connection: &mut SqliteConnection) -> Result<usize> {
let num_rows_deleted = diesel::delete(category_transfers_table)
.execute(connection)
.with_context(|| "failed to delete all category transfers")?;
Ok(num_rows_deleted)
}
pub fn get_all_category_transfers(connection: &mut SqliteConnection) -> Result<Vec<CategoryTransfer>> {
let all_category_transfers = category_transfers_table
.select(CategoryTransfer::as_select())
.load(connection)
.with_context(|| "failed to get all category transfers")?;
Ok(all_category_transfers)
}
pub fn insert_category_transfers(
category_transfers: &[CategoryTransfer],
connection: &mut SqliteConnection,
) -> Result<usize> {
let num_rows_inserted = diesel::insert_into(category_transfers_table)
.values(category_transfers)
.execute(connection)
.with_context(|| insert_err_msg(&category_transfers))?;
Ok(num_rows_inserted)
}
fn insert_err_msg(category_transfers: &[CategoryTransfer]) -> String {
format!(
"failed to insert category transfers: [{}]",
category_transfers
.iter()
.map(|ct| ct.id.to_string())
.collect::<Vec<String>>()
.join(", ")
)
}
pub fn sum_category_transfer_quantity_per_from_category_id(
connection: &mut SqliteConnection,
) -> Result<Vec<(i32, i64)>> {
let sum = category_transfers_table
.group_by(category_transfers_schema::from_category_id)
.select((
category_transfers_schema::from_category_id,
sum(category_transfers_schema::quantity),
))
.load::<(i32, Option<i64>)>(connection)
.map(|result| result.iter().map(|sum| (sum.0, sum.1.unwrap_or(0))).collect())
.with_context(|| "failed to sum category transfer quantity per from category ID")?;
Ok(sum)
}
pub fn sum_category_transfer_quantity_per_to_category_id(
connection: &mut SqliteConnection,
) -> Result<Vec<(i32, i64)>> {
let sum = category_transfers_table
.group_by(category_transfers_schema::to_category_id)
.select((
category_transfers_schema::to_category_id,
sum(category_transfers_schema::quantity),
))
.load::<(i32, Option<i64>)>(connection)
.map(|vec| vec.iter().map(|(id, sum)| (*id, sum.unwrap_or(0))).collect())
.with_context(|| "failed to sum category transfer quantity per to category ID")?;
Ok(sum)
}
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