Transforms budget drips with unique IDs across a single AB zero budget

1 files changed, 15 insertions, 1 deletions

diff --git a/rust/actualbudget_to_schist_transformer/src/transform_state/transform_budget_drips.rs b/rust/actualbudget_to_schist_transformer/src/transform_state/transform_budget_drips.rs
index 2e9125b..7ec41af 100644
--- a/rust/actualbudget_to_schist_transformer/src/transform_state/transform_budget_drips.rs
+++ b/rust/actualbudget_to_schist_transformer/src/transform_state/transform_budget_drips.rs
@@ -1,3 +1,5 @@
+use std::hash::{DefaultHasher, Hash, Hasher};
+
 use actualbudget_models::ActualbudgetZeroBudget;
 use anyhow::{Context, Result};
 use itertools::Itertools;
@@ -46,7 +48,7 @@ fn map_actualbudget_zero_budget_to_budget_drips(
 
     let budget_drips: Vec<BudgetDrip> = days_in_month.iter().map(|&date|
         BudgetDrip {
-            id: transform_id(&actualbudget_zero_budget.id),
+            id: transform_budget_drip_id(&actualbudget_zero_budget, &date),
             category_id: transform_id(&actualbudget_zero_budget.category_id),
             date,
             quantity: if date == first_day_of_month {
@@ -85,6 +87,18 @@ fn group_actualbudget_zero_budgets_by_category_id(
         ).collect()
 }
 
+fn transform_budget_drip_id(
+    actualbudget_zero_budget: &ActualbudgetZeroBudget,
+    date: &DateUtc,
+) -> i32 {
+    let mut hasher = DefaultHasher::new();
+    let unique_str = actualbudget_zero_budget.id.clone() + date.to_string().as_str();
+    unique_str.hash(&mut hasher);
+    (hasher.finish() % std::convert::TryInto::<u64>::try_into(i32::MAX).unwrap())
+        .try_into()
+        .unwrap()
+}
+
 #[cfg(test)]
 mod test {
     use actualbudget_fakes::actualbudget_zero_budget::make_fake_actualbudget_zero_budget_builder;