Pagination on releases page (#2035)

* Added count to GetReleasesByRepoID so pagination will work

* Separated it out to a new function, can then also leave the API part unaffected

* Remove extra whitespace added in untouched function

* Added comment and corrected name in error handler

* Account for if the user is owner or not in the count

* Also check if repo is draft

* revert back to the correct count in the ReleasesToDisplay loop

* Fixed lint error regarding else with return statement

* Use Cond struct instead of string, corrected name in error handler

* Removed unused return variable names

models/release.go

@@ -14,6 +14,7 @@ import (
 	"code.gitea.io/gitea/modules/process"
 	"code.gitea.io/gitea/modules/setting"
 	api "code.gitea.io/sdk/gitea"
+	"github.com/go-xorm/builder"
 	"github.com/go-xorm/xorm"
 )
 
@@ -244,6 +245,19 @@ func GetReleasesByRepoID(repoID int64, page, pageSize int) (rels []*Release, err
 	return rels, err
 }
 
+// GetReleaseCountByRepoID returns the count of releases of repository
+func GetReleaseCountByRepoID(repoID int64, includeDrafts bool) (int64, error) {
+	var cond = builder.NewCond()
+	cond = cond.And(builder.Eq{"repo_id": repoID})
+
+	if includeDrafts {
+		return x.Where(cond).Count(&Release{})
+	}
+
+	cond = cond.And(builder.Eq{"is_draft": false})
+	return x.Where(cond).Count(&Release{})
+}
+
 // GetReleasesByRepoIDAndNames returns a list of releases of repository according repoID and tagNames.
 func GetReleasesByRepoIDAndNames(repoID int64, tagNames []string) (rels []*Release, err error) {
 	err = x.