Moved getAlbumList logic to engine layer

engine/lists.go

@@ -0,0 +1,47 @@
+package engine
+
+import (
+	"github.com/deluan/gosonic/domain"
+)
+
+type ListGenerator interface {
+	GetNewest(offset int, size int) (*domain.Albums, error)
+	GetRecent(offset int, size int) (*domain.Albums, error)
+	GetFrequent(offset int, size int) (*domain.Albums, error)
+	GetHighest(offset int, size int) (*domain.Albums, error)
+}
+
+func NewListGenerator(alr domain.AlbumRepository) ListGenerator {
+	return listGenerator{alr}
+}
+
+type listGenerator struct {
+	albumRepo domain.AlbumRepository
+}
+
+func (g listGenerator) query(qo domain.QueryOptions, offset int, size int) (*domain.Albums, error) {
+	qo.Offset = offset
+	qo.Size = size
+	als, err := g.albumRepo.GetAll(qo)
+	return &als, err
+}
+
+func (g listGenerator) GetNewest(offset int, size int) (*domain.Albums, error) {
+	qo := domain.QueryOptions{SortBy: "CreatedAt", Desc: true, Alpha: true}
+	return g.query(qo, offset, size)
+}
+
+func (g listGenerator) GetRecent(offset int, size int) (*domain.Albums, error) {
+	qo := domain.QueryOptions{SortBy: "PlayDate", Desc: true, Alpha: true}
+	return g.query(qo, offset, size)
+}
+
+func (g listGenerator) GetFrequent(offset int, size int) (*domain.Albums, error) {
+	qo := domain.QueryOptions{SortBy: "PlayCount", Desc: true}
+	return g.query(qo, offset, size)
+}
+
+func (g listGenerator) GetHighest(offset int, size int) (*domain.Albums, error) {
+	qo := domain.QueryOptions{SortBy: "Rating", Desc: true}
+	return g.query(qo, offset, size)
+}