Move convert package to services (#22264)

Addition to #22256

The `convert` package relies heavily on different models which is
[disallowed by our definition of
modules](https://github.com/go-gitea/gitea/blob/main/CONTRIBUTING.md#design-guideline).
This helps to prevent possible import cycles.

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

services/convert/mirror.go

@@ -0,0 +1,38 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package convert
+
+import (
+	repo_model "code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/modules/git"
+	api "code.gitea.io/gitea/modules/structs"
+)
+
+// ToPushMirror convert from repo_model.PushMirror and remoteAddress to api.TopicResponse
+func ToPushMirror(pm *repo_model.PushMirror) (*api.PushMirror, error) {
+	repo := pm.GetRepository()
+	remoteAddress, err := getRemoteAddress(repo, pm.RemoteName)
+	if err != nil {
+		return nil, err
+	}
+	return &api.PushMirror{
+		RepoName:       repo.Name,
+		RemoteName:     pm.RemoteName,
+		RemoteAddress:  remoteAddress,
+		CreatedUnix:    pm.CreatedUnix.FormatLong(),
+		LastUpdateUnix: pm.LastUpdateUnix.FormatLong(),
+		LastError:      pm.LastError,
+		Interval:       pm.Interval.String(),
+	}, nil
+}
+
+func getRemoteAddress(repo *repo_model.Repository, remoteName string) (string, error) {
+	url, err := git.GetRemoteURL(git.DefaultContext, repo.RepoPath(), remoteName)
+	if err != nil {
+		return "", err
+	}
+	// remove confidential information
+	url.User = nil
+	return url.String(), nil
+}