1 files changed, 128 insertions, 0 deletions
diff --git a/bridge/core/import.go b/bridge/core/import.go
new file mode 100644
index 00000000..0961e00b
--- /dev/null
+++ b/bridge/core/import.go
@@ -0,0 +1,128 @@
+package core
+
+import (
+	"fmt"
+
+	"github.com/MichaelMure/git-bug/entity"
+)
+
+type ImportEvent int
+
+const (
+	_ ImportEvent = iota
+	ImportEventBug
+	ImportEventComment
+	ImportEventCommentEdition
+	ImportEventStatusChange
+	ImportEventTitleEdition
+	ImportEventLabelChange
+	ImportEventIdentity
+	ImportEventNothing
+	ImportEventError
+)
+
+// ImportResult is an event that is emitted during the import process, to
+// allow calling code to report on what is happening, collect metrics or
+// display meaningful errors if something went wrong.
+type ImportResult struct {
+	Err    error
+	Event  ImportEvent
+	ID     entity.Id
+	Reason string
+}
+
+func (er ImportResult) String() string {
+	switch er.Event {
+	case ImportEventBug:
+		return fmt.Sprintf("new issue: %s", er.ID)
+	case ImportEventComment:
+		return fmt.Sprintf("new comment: %s", er.ID)
+	case ImportEventCommentEdition:
+		return fmt.Sprintf("updated comment: %s", er.ID)
+	case ImportEventStatusChange:
+		return fmt.Sprintf("changed status: %s", er.ID)
+	case ImportEventTitleEdition:
+		return fmt.Sprintf("changed title: %s", er.ID)
+	case ImportEventLabelChange:
+		return fmt.Sprintf("changed label: %s", er.ID)
+	case ImportEventIdentity:
+		return fmt.Sprintf("new identity: %s", er.ID)
+	case ImportEventNothing:
+		if er.ID != "" {
+			return fmt.Sprintf("ignoring import event %s: %s", er.ID, er.Reason)
+		}
+		return fmt.Sprintf("ignoring event: %s", er.Reason)
+	case ImportEventError:
+		if er.ID != "" {
+			return fmt.Sprintf("import error at id %s: %s", er.ID, er.Err.Error())
+		}
+		return fmt.Sprintf("import error: %s", er.Err.Error())
+	default:
+		panic("unknown import result")
+	}
+}
+
+func NewImportError(err error, id entity.Id) ImportResult {
+	return ImportResult{
+		Err:   err,
+		ID:    id,
+		Event: ImportEventError,
+	}
+}
+
+func NewImportNothing(id entity.Id, reason string) ImportResult {
+	return ImportResult{
+		ID:     id,
+		Reason: reason,
+		Event:  ImportEventNothing,
+	}
+}
+
+func NewImportBug(id entity.Id) ImportResult {
+	return ImportResult{
+		ID:    id,
+		Event: ImportEventBug,
+	}
+}
+
+func NewImportComment(id entity.Id) ImportResult {
+	return ImportResult{
+		ID:    id,
+		Event: ImportEventComment,
+	}
+}
+
+func NewImportCommentEdition(id entity.Id) ImportResult {
+	return ImportResult{
+		ID:    id,
+		Event: ImportEventCommentEdition,
+	}
+}
+
+func NewImportStatusChange(id entity.Id) ImportResult {
+	return ImportResult{
+		ID:    id,
+		Event: ImportEventStatusChange,
+	}
+}
+
+func NewImportLabelChange(id entity.Id) ImportResult {
+	return ImportResult{
+		ID:    id,
+		Event: ImportEventLabelChange,
+	}
+}
+
+func NewImportTitleEdition(id entity.Id) ImportResult {
+	return ImportResult{
+		ID:    id,
+		Event: ImportEventTitleEdition,
+	}
+}
+
+func NewImportIdentity(id entity.Id) ImportResult {
+	return ImportResult{
+		ID:    id,
+		Event: ImportEventIdentity,
+	}
+}