initial file store

internal/file_store.go

@@ -0,0 +1,29 @@
+package internal
+
+import (
+	"fmt"
+	"os"
+)
+
+// FileStore loads and saves the state into a file
+type FileStore struct {
+	file *os.File
+}
+
+func NewFileStore(filename string) (*FileStore, error) {
+	f, err := os.Open(filename)
+	if err != nil {
+		return nil, err
+	}
+	return &FileStore{
+		file: f,
+	}, nil
+}
+
+func (fs *FileStore) Load() (map[string]*FillerQueue, error) {
+	return nil, fmt.Errorf("not implemented")
+}
+
+func (fs *FileStore) Save(map[string]*FillerQueue) error {
+	return fmt.Errorf("not implemented")
+}

internal/report.go

@@ -148,8 +148,6 @@ func BuildReport(ctx context.Context, reader RecordReader, writer ReportWriter,
 			}
 		}
 	}
-
-	return nil
 }
 
 // processRecord either adds buys to the queue or consumes buys from the queue when processing a
@@ -186,7 +184,7 @@ func processRecord(ctx context.Context, q *FillerQueue, rec Record, sel Selector
 				return ErrInsufficientBoughtVolume
 			}
 
-			// Since we don't apply selectors while processing buys we need to apply them here, befre we
+			// Since we don't apply selectors while processing buys we need to apply them here, before we
 			// actually use them.
 			if !sel(buy) {
 				continue