Gets first activity date from AB state

3 files changed, 30 insertions, 10 deletions

diff --git a/rust/actualbudget_to_schist_transformer/src/transform_state/transform_accounts.rs b/rust/actualbudget_to_schist_transformer/src/transform_state/transform_accounts.rs
index f4c0773..28d8162 100644
--- a/rust/actualbudget_to_schist_transformer/src/transform_state/transform_accounts.rs
+++ b/rust/actualbudget_to_schist_transformer/src/transform_state/transform_accounts.rs
@@ -6,14 +6,14 @@ use super::transform_id;
 pub fn transform_accounts(
     actualbudget_accounts: &[ActualbudgetAccount],
     actualbudget_category_transfers_account: &Option<ActualbudgetAccount>,
-    first_transaction_date: &DateUtc,
+    first_activity_date: &DateUtc,
 ) -> Vec<Account> {
     actualbudget_accounts
         .iter()
         .filter(|a| actualbudget_category_transfers_account
             .clone()
             .is_some_and(|cta| cta.id != a.id)
-        ).map(|a| transform_account(a, first_transaction_date))
+        ).map(|a| transform_account(a, first_activity_date))
         .collect()
 }
 
diff --git a/rust/actualbudget_to_schist_transformer/src/transform_state/transform_categories.rs b/rust/actualbudget_to_schist_transformer/src/transform_state/transform_categories.rs
index b78fd2b..17ce194 100644
--- a/rust/actualbudget_to_schist_transformer/src/transform_state/transform_categories.rs
+++ b/rust/actualbudget_to_schist_transformer/src/transform_state/transform_categories.rs
@@ -1,4 +1,5 @@
 use actualbudget_models::{ActualbudgetCategory, ActualbudgetZeroBudget};
+use itertools::Itertools;
 use schist_models::{budget_period_unit::BudgetPeriodUnit, category::Category, date_utc::DateUtc};
 
 use super::transform_id;
@@ -6,13 +7,32 @@ use super::transform_id;
 pub fn transform_categories(
     actualbudget_categories: &[ActualbudgetCategory],
     actualbudget_zero_budgets: &[ActualbudgetZeroBudget],
-    before_first_transaction: &DateUtc,
+    before_first_activity: &DateUtc,
 ) -> Vec<Category> {
+    let last_non_zero_month = actualbudget_zero_budgets
+        .iter()
+        .map(|zb| zb.month.clone())
+        .unique()
+        .filter(|month| actualbudget_zero_budgets
+            .iter()
+            .any(|zb| zb.month == *month && zb.amount != 0)
+        ).max();
+
+    let actualbudget_zero_budgets = if let Some(last_non_zero_month) = last_non_zero_month {
+        &actualbudget_zero_budgets
+            .iter()
+            .filter(|zb| zb.month == last_non_zero_month)
+            .cloned()
+            .collect::<Vec<_>>()
+    } else {
+        actualbudget_zero_budgets
+    };
+
     actualbudget_categories.iter().map(|actualbudget_category| Category {
         id: transform_id(&actualbudget_category.id.clone()),
         name: actualbudget_category.name.clone(),
         balance: 0,
-        balance_date: before_first_transaction.clone(),
+        balance_date: before_first_activity.clone(),
         budget_period: 1,
         budget_period_unit: BudgetPeriodUnit::Month,
         budget_quantity: get_budget_quantity(actualbudget_category, actualbudget_zero_budgets),
diff --git a/rust/actualbudget_to_schist_transformer/src/transform_state/transform_state.rs b/rust/actualbudget_to_schist_transformer/src/transform_state/transform_state.rs
index 2864f38..38eabcc 100644
--- a/rust/actualbudget_to_schist_transformer/src/transform_state/transform_state.rs
+++ b/rust/actualbudget_to_schist_transformer/src/transform_state/transform_state.rs
@@ -14,20 +14,20 @@ fn transform_state_without_context(actualbudget_state: ActualbudgetState) -> Res
     let (remaining_transactions, account_transfers) = transform_account_transfers(
         &actualbudget_state.actualbudget_transactions,
     )?;
-    let first_transaction_date =
-        transform_date(&actualbudget_state.actualbudget_first_transaction_date)?;
-    let before_first_transaction_date = find_date_before(&first_transaction_date)?;
+    let first_activity_date =
+        transform_date(&actualbudget_state.actualbudget_first_activity_date)?;
+    let before_first_activity_date = find_date_before(&first_activity_date)?;
     let accounts: Vec<Account> =
         transform_accounts(
             &actualbudget_state.actualbudget_accounts,
             &actualbudget_state.actualbudget_category_transfers_account,
-            &first_transaction_date,
+            &first_activity_date,
         );
     let budget_drips = transform_budget_drips(&actualbudget_state.actualbudget_zero_budgets)?;
     let categories: Vec<Category> = transform_categories(
         &actualbudget_state.actualbudget_categories,
         &actualbudget_state.actualbudget_zero_budgets,
-        &before_first_transaction_date,
+        &before_first_activity_date,
     );
     let (transactions, transaction_categorisations): (Vec<Transaction>, Vec<TransactionCategorisation>) =
         transform_transactions(
@@ -40,7 +40,7 @@ fn transform_state_without_context(actualbudget_state: ActualbudgetState) -> Res
     )?;
 
     Ok(SchistState {
-        first_transaction_date,
+        first_transaction_date: first_activity_date,
         accounts,
         account_transfers,
         categories,