Implement assignment import and clear of budget

postgres/queries/assignments.sql

@@ -0,0 +1,13 @@
+-- name: CreateAssignment :one
+INSERT INTO assignments (
+        date, amount, category_id
+) VALUES (
+        $1, $2, $3
+)
+RETURNING *;
+
+-- name: DeleteAllAssignments :execrows
+DELETE FROM assignments
+USING categories
+INNER JOIN category_groups ON categories.category_group_id = category_groups.id
+WHERE categories.id = assignments.category_id AND category_groups.budget_id = @budget_id;

postgres/queries/categories.sql

@@ -21,6 +21,14 @@ WHERE category_groups.budget_id = $1;
 
 -- name: GetCategoriesWithBalance :many
 SELECT categories.id, categories.name, category_groups.name as group, 
+    COALESCE(
+        (
+            SELECT SUM(a_hist.amount)
+            FROM assignments a_hist
+            WHERE categories.id = a_hist.category_id 
+            AND a_hist.date < @from_date
+        )
+    , 0)::decimal(12,2) as balance_assignments, 
     COALESCE(
         (
             SELECT SUM(t_hist.amount)

postgres/queries/transactions.sql

@@ -26,4 +26,10 @@ LEFT JOIN categories ON categories.id = transactions.category_id
 LEFT JOIN category_groups ON category_groups.id = categories.category_group_id
 WHERE transactions.account_id = $1
 ORDER BY transactions.date DESC
-LIMIT 200;
+LIMIT 200;
+
+-- name: DeleteAllTransactions :execrows
+DELETE FROM transactions
+USING accounts
+WHERE accounts.budget_id = @budget_id
+AND accounts.id = transactions.account_id;