Add label names as filter in issue search api (#5946)

models/issue_label.go

@@ -203,13 +203,26 @@ func GetLabelInRepoByName(repoID int64, labelName string) (*Label, error) {
 	return getLabelInRepoByName(x, repoID, labelName)
 }
 
+// GetLabelIDsInRepoByNames returns a list of labelIDs by names in a given
+// repository.
+// it silently ignores label names that do not belong to the repository.
+func GetLabelIDsInRepoByNames(repoID int64, labelNames []string) ([]int64, error) {
+	labelIDs := make([]int64, 0, len(labelNames))
+	return labelIDs, x.Table("label").
+		Where("repo_id = ?", repoID).
+		In("name", labelNames).
+		Asc("name").
+		Cols("id").
+		Find(&labelIDs)
+}
+
 // GetLabelInRepoByID returns a label by ID in given repository.
 func GetLabelInRepoByID(repoID, labelID int64) (*Label, error) {
 	return getLabelInRepoByID(x, repoID, labelID)
 }
 
 // GetLabelsInRepoByIDs returns a list of labels by IDs in given repository,
-// it silently ignores label IDs that are not belong to the repository.
+// it silently ignores label IDs that do not belong to the repository.
 func GetLabelsInRepoByIDs(repoID int64, labelIDs []int64) ([]*Label, error) {
 	labels := make([]*Label, 0, len(labelIDs))
 	return labels, x.

models/issue_label_test.go

@@ -81,6 +81,30 @@ func TestGetLabelInRepoByName(t *testing.T) {
 	assert.True(t, IsErrLabelNotExist(err))
 }
 
+func TestGetLabelInRepoByNames(t *testing.T) {
+	assert.NoError(t, PrepareTestDatabase())
+	labelIDs, err := GetLabelIDsInRepoByNames(1, []string{"label1", "label2"})
+	assert.NoError(t, err)
+
+	assert.Len(t, labelIDs, 2)
+
+	assert.Equal(t, int64(1), labelIDs[0])
+	assert.Equal(t, int64(2), labelIDs[1])
+}
+
+func TestGetLabelInRepoByNamesDiscardsNonExistentLabels(t *testing.T) {
+	assert.NoError(t, PrepareTestDatabase())
+	// label3 doesn't exists.. See labels.yml
+	labelIDs, err := GetLabelIDsInRepoByNames(1, []string{"label1", "label2", "label3"})
+	assert.NoError(t, err)
+
+	assert.Len(t, labelIDs, 2)
+
+	assert.Equal(t, int64(1), labelIDs[0])
+	assert.Equal(t, int64(2), labelIDs[1])
+	assert.NoError(t, err)
+}
+
 func TestGetLabelInRepoByID(t *testing.T) {
 	assert.NoError(t, PrepareTestDatabase())
 	label, err := GetLabelInRepoByID(1, 1)