Rework api/user/repos for pagination (#11827)

* Add count to `GetUserRepositories` so that pagination can be supported for `/user/{username}/repos`
* Rework ListMyRepos to use models.SearchRepository

ListMyRepos was an odd one. It first fetched all user repositories and then tried to supplement them with accessible map. The end result was that:

* Limit for pagination did not work because accessible repos would always be appended
* The amount of pages was incorrect if one were to calculate it
* When paginating, all accessible repos would be shown on every page

Hopefully it should now work properly. Fixes #11800 and does not require any change on Drone-side as it can properly interpret and act on Link header which we now set.

Co-authored-by: Lauris BH <lauris@nix.lv>

models/repo.go

@@ -35,6 +35,7 @@ import (
 	"code.gitea.io/gitea/modules/util"
 
 	"github.com/unknwon/com"
+	"xorm.io/builder"
 )
 
 var (
@@ -1774,22 +1775,28 @@ func GetRepositoriesMapByIDs(ids []int64) (map[int64]*Repository, error) {
 }
 
 // GetUserRepositories returns a list of repositories of given user.
-func GetUserRepositories(opts *SearchRepoOptions) ([]*Repository, error) {
+func GetUserRepositories(opts *SearchRepoOptions) ([]*Repository, int64, error) {
 	if len(opts.OrderBy) == 0 {
 		opts.OrderBy = "updated_unix DESC"
 	}
 
-	sess := x.
-		Where("owner_id = ?", opts.Actor.ID).
-		OrderBy(opts.OrderBy.String())
+	var cond = builder.NewCond()
+	cond = cond.And(builder.Eq{"owner_id": opts.Actor.ID})
 	if !opts.Private {
-		sess.And("is_private=?", false)
+		cond = cond.And(builder.Eq{"is_private": false})
 	}
 
-	sess = opts.setSessionPagination(sess)
+	sess := x.NewSession()
+	defer sess.Close()
 
+	count, err := sess.Where(cond).Count(new(Repository))
+	if err != nil {
+		return nil, 0, fmt.Errorf("Count: %v", err)
+	}
+
+	sess.Where(cond).OrderBy(opts.OrderBy.String())
 	repos := make([]*Repository, 0, opts.PageSize)
-	return repos, opts.setSessionPagination(sess).Find(&repos)
+	return repos, count, opts.setSessionPagination(sess).Find(&repos)
 }
 
 // GetUserMirrorRepositories returns a list of mirror repositories of given user.

models/user.go

@@ -646,7 +646,7 @@ func (u *User) GetOrganizationCount() (int64, error) {
 
 // GetRepositories returns repositories that user owns, including private repositories.
 func (u *User) GetRepositories(listOpts ListOptions) (err error) {
-	u.Repos, err = GetUserRepositories(&SearchRepoOptions{Actor: u, Private: true, ListOptions: listOpts})
+	u.Repos, _, err = GetUserRepositories(&SearchRepoOptions{Actor: u, Private: true, ListOptions: listOpts})
 	return err
 }