Some small refactors (#33144)

models/issues/issue_list.go

@@ -81,53 +81,19 @@ func (issues IssueList) LoadPosters(ctx context.Context) error {
 		return issue.PosterID, issue.Poster == nil && issue.PosterID > 0
 	})
 
-	posterMaps, err := getPostersByIDs(ctx, posterIDs)
+	posterMaps, err := user_model.GetUsersMapByIDs(ctx, posterIDs)
 	if err != nil {
 		return err
 	}
 
 	for _, issue := range issues {
 		if issue.Poster == nil {
-			issue.Poster = getPoster(issue.PosterID, posterMaps)
+			issue.Poster = user_model.GetPossibleUserFromMap(issue.PosterID, posterMaps)
 		}
 	}
 	return nil
 }
 
-func getPostersByIDs(ctx context.Context, posterIDs []int64) (map[int64]*user_model.User, error) {
-	posterMaps := make(map[int64]*user_model.User, len(posterIDs))
-	left := len(posterIDs)
-	for left > 0 {
-		limit := db.DefaultMaxInSize
-		if left < limit {
-			limit = left
-		}
-		err := db.GetEngine(ctx).
-			In("id", posterIDs[:limit]).
-			Find(&posterMaps)
-		if err != nil {
-			return nil, err
-		}
-		left -= limit
-		posterIDs = posterIDs[limit:]
-	}
-	return posterMaps, nil
-}
-
-func getPoster(posterID int64, posterMaps map[int64]*user_model.User) *user_model.User {
-	if posterID == user_model.ActionsUserID {
-		return user_model.NewActionsUser()
-	}
-	if posterID <= 0 {
-		return nil
-	}
-	poster, ok := posterMaps[posterID]
-	if !ok {
-		return user_model.NewGhostUser()
-	}
-	return poster
-}
-
 func (issues IssueList) getIssueIDs() []int64 {
 	ids := make([]int64, 0, len(issues))
 	for _, issue := range issues {