From d7081a6e0c5eed4438f9f3e8950901031bfe70ec Mon Sep 17 00:00:00 2001
From: Joe Carstairs <me@joeac.net>
Date: Thu, 5 Dec 2024 23:14:53 +0000
Subject: Can get first AB zero budget date

---
 .../actualbudget_queries/src/actualbudget_zero_budgets.rs | 12 ++++++++++--
 .../tests/actualbudget_zero_budgets.rs                    | 15 ++++++++++++++-
 2 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/rust/actualbudget_queries/src/actualbudget_zero_budgets.rs b/rust/actualbudget_queries/src/actualbudget_zero_budgets.rs
index 7366f86..5ae4055 100644
--- a/rust/actualbudget_queries/src/actualbudget_zero_budgets.rs
+++ b/rust/actualbudget_queries/src/actualbudget_zero_budgets.rs
@@ -1,7 +1,7 @@
 use anyhow::{Context, Result};
-use actualbudget_models::ActualbudgetZeroBudget;
+use actualbudget_models::{actualbudget_schema::zero_budgets as zero_budgets_schema, ActualbudgetDate, ActualbudgetZeroBudget};
 use actualbudget_schema::actualbudget_schema::zero_budgets::dsl::zero_budgets as zero_budgets_table;
-use diesel::{QueryDsl, RunQueryDsl, SelectableHelper, SqliteConnection};
+use diesel::{dsl::min, result::Error, QueryDsl, RunQueryDsl, SelectableHelper, SqliteConnection};
 
 pub fn get_all_actualbudget_zero_budgets(connection: &mut SqliteConnection) -> Result<Vec<ActualbudgetZeroBudget>> {
     let zero_budgets = zero_budgets_table
@@ -10,3 +10,11 @@ pub fn get_all_actualbudget_zero_budgets(connection: &mut SqliteConnection) -> R
         .with_context(|| "failed to get all Actualbudget zero budgets")?;
     Ok(zero_budgets)
 }
+
+pub fn get_first_zero_budget_date(connection: &mut SqliteConnection) -> Result<ActualbudgetDate> {
+    let date_as_int = zero_budgets_table
+        .select(min(zero_budgets_schema::month))
+        .first::<Option<i32>>(connection)
+        .map_or_else(|e| Err(e), |o| o.map_or_else(|| Err(Error::NotFound), |i| Ok(i)))?;
+    Ok(ActualbudgetDate::from_i32(date_as_int))
+}
diff --git a/rust/actualbudget_queries/tests/actualbudget_zero_budgets.rs b/rust/actualbudget_queries/tests/actualbudget_zero_budgets.rs
index 471498c..7218227 100644
--- a/rust/actualbudget_queries/tests/actualbudget_zero_budgets.rs
+++ b/rust/actualbudget_queries/tests/actualbudget_zero_budgets.rs
@@ -1,6 +1,6 @@
 pub mod common;
 
-use actualbudget_queries::actualbudget_zero_budgets::get_all_actualbudget_zero_budgets;
+use actualbudget_queries::actualbudget_zero_budgets::{get_all_actualbudget_zero_budgets, get_first_zero_budget_date};
 use common::{db_url::DB_URL, get_reference_data::get_categories, zero_budget_matchers::get_zero_budget_matchers};
 use diesel::{Connection, SqliteConnection};
 
@@ -19,3 +19,16 @@ fn given_test_database_when_get_all_zero_budgets_then_return_zero_budgets() {
         assert!(zero_budgets.iter().any(|zb| matcher(zb, &categories)))
     }
 }
+
+#[test]
+fn given_test_database_when_get_first_zero_budget_date_then_return_1_aug_2024() {
+    let connection = &mut SqliteConnection::establish(DB_URL).unwrap();
+
+    let date = get_first_zero_budget_date(connection);
+
+    assert!(date.is_ok());
+    let date = date.unwrap();
+    assert_eq!("01", date.day());
+    assert_eq!("08", date.month());
+    assert_eq!("2024", date.year());
+}
-- 
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