fix adding reaction fail for read permission (#5515)

routers/repo/issue.go

@@ -1248,7 +1248,7 @@ func ChangeIssueReaction(ctx *context.Context, form auth.ReactionForm) {
 		return
 	}
 
-	if !ctx.IsSigned || (ctx.User.ID != issue.PosterID && !ctx.Repo.CanWriteIssuesOrPulls(issue.IsPull)) {
+	if !ctx.IsSigned || (ctx.User.ID != issue.PosterID && !ctx.Repo.CanReadIssuesOrPulls(issue.IsPull)) {
 		ctx.Error(403)
 		return
 	}
@@ -1327,7 +1327,7 @@ func ChangeCommentReaction(ctx *context.Context, form auth.ReactionForm) {
 		return
 	}
 
-	if !ctx.IsSigned || (ctx.User.ID != comment.PosterID && !ctx.Repo.CanWriteIssuesOrPulls(comment.Issue.IsPull)) {
+	if !ctx.IsSigned || (ctx.User.ID != comment.PosterID && !ctx.Repo.CanReadIssuesOrPulls(comment.Issue.IsPull)) {
 		ctx.Error(403)
 		return
 	} else if comment.Type != models.CommentTypeComment && comment.Type != models.CommentTypeCode {