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path: root/bridge/core/import.go
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package core

import (
	"fmt"
	"strings"

	"github.com/MichaelMure/git-bug/entity"
)

type ImportEvent int

const (
	_ ImportEvent = iota

	// Bug has been created
	ImportEventBug
	// Comment has been created
	ImportEventComment
	// Comment has been edited
	ImportEventCommentEdition
	// Bug's status has changed
	ImportEventStatusChange
	// Bug's title has changed
	ImportEventTitleEdition
	// Bug's labels changed
	ImportEventLabelChange
	// Nothing happened on a Bug
	ImportEventNothing

	// Identity has been created
	ImportEventIdentity

	// Something wrong happened during import that is worth notifying to the user
	// but not severe enough to consider the import a failure.
	ImportEventWarning

	// Error happened during import
	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("no action taken for event %s: %s", er.ID, er.Reason)
		}
		return fmt.Sprintf("no action taken: %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())
	case ImportEventWarning:
		parts := make([]string, 0, 4)
		parts = append(parts, "warning:")
		if er.ID != "" {
			parts = append(parts, fmt.Sprintf("at id %s", er.ID))
		}
		if er.Reason != "" {
			parts = append(parts, fmt.Sprintf("reason: %s", er.Reason))
		}
		if er.Err != nil {
			parts = append(parts, fmt.Sprintf("err: %s", er.Err))
		}
		return strings.Join(parts, " ")

	default:
		panic("unknown import result")
	}
}

func NewImportError(err error, id entity.Id) ImportResult {
	return ImportResult{
		Err:   err,
		ID:    id,
		Event: ImportEventError,
	}
}

func NewImportWarning(err error, id entity.Id) ImportResult {
	return ImportResult{
		Err:   err,
		ID:    id,
		Event: ImportEventWarning,
	}
}

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,
	}
}