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response: sort entries before final .Create()
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adamdecaf committed Dec 17, 2024
1 parent cc6875b commit fc8be90
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Showing 4 changed files with 39 additions and 0 deletions.
2 changes: 2 additions & 0 deletions .gitignore
Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,8 @@
*.a
*.so

.DS_Store

# Folders
_obj
_test
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7 changes: 7 additions & 0 deletions pkg/response/file_transformer.go
Original file line number Diff line number Diff line change
@@ -1,10 +1,12 @@
package response

import (
"cmp"
"context"
"fmt"
"math/rand"
"path/filepath"
"slices"
"time"

"github.com/moov-io/ach"
Expand Down Expand Up @@ -99,6 +101,11 @@ func (ft *FileTransfomer) Transform(ctx context.Context, file *ach.File) error {
for delay, batchesByCategory := range outBatches {
for _, batch := range batchesByCategory {
if entries = (*batch).GetEntries(); len(entries) > 0 {
// Sort the entries before the final build
slices.SortFunc(entries, func(e1, e2 *ach.EntryDetail) int {
return cmp.Compare(e1.TraceNumber, e2.TraceNumber)
})

if err := (*batch).Create(); err != nil {
return fmt.Errorf("transform batch[%d] create error: %v", i, err)
}
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23 changes: 23 additions & 0 deletions pkg/response/file_transformer_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,9 @@ var (
Value: 62_01,
},
}
matchRoutingNumber = service.Match{
RoutingNumber: "083000137",
}

actionReturn = service.Action{
Return: &service.Return{
Expand Down Expand Up @@ -1040,3 +1043,23 @@ func TestFileTransformer_CTX(t *testing.T) {
require.Equal(t, "C01", entries[0].Addenda98.ChangeCode)
})
}

func TestFileTransform_Sorted(t *testing.T) {
resp := service.Response{
Match: matchRoutingNumber,
Action: actionReturn,
}
fileTransformer, _ := testFileTransformer(t, resp)

// read the file
achIn, err := ach.ReadFile(filepath.Join("..", "..", "testdata", "out-of-order.ach"))
require.NoError(t, err)
require.NotNil(t, achIn)

// transform the file several times making sure we don't error
// The code can sometimes reorder entries which causes the transform to fail
for i := 0; i < 100; i++ {
err := fileTransformer.Transform(context.Background(), achIn)
require.NoError(t, err)
}
}
7 changes: 7 additions & 0 deletions testdata/out-of-order.ach
Original file line number Diff line number Diff line change
@@ -0,0 +1,7 @@
101 011000015 2214757862412170450A094101FRBBOSTON MOOVODFI
5200BT* Matt's Biz MjZjNDQzY2CCD12275-1 241217 1221475780000004
622083000137345452324 0000000180 Matt Ryavec Co cc0221475780029324
622083000137121212 0000000100 Matt Ryavec Co 390221475780109254
82000000020016600026000000000000000000000280MjZjNDQzY2 221475780000004
9000014000005000000190371392563000000509793000000509793
9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999

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