add multi which can return multiple resources

1 files changed, 39 insertions, 0 deletions

diff --git a/internal/resource/multi.go b/internal/resource/multi.go
new file mode 100644
index 0000000..1694814
--- /dev/null
+++ b/internal/resource/multi.go
@@ -0,0 +1,39 @@
+package resource
+
+import (
+	"errors"
+	"strings"
+)
+
+// Multi is a collection of resources that satisfies the api.Resource interface.
+type Multi []Resource
+
+func (m Multi) String() string {
+	strs := make([]string, 0, len(m))
+
+	for _, res := range m {
+		strs = append(strs, res.String())
+	}
+
+	return strings.Join(strs, ", ")
+}
+
+func (m Multi) ID() string {
+	ids := make([]string, 0, len(m))
+
+	for _, res := range m {
+		ids = append(ids, res.String())
+	}
+
+	return strings.Join(ids, "+")
+}
+
+func (m Multi) Apply() error {
+	var errs []error
+
+	for _, res := range m {
+		errs = append(errs, res.Apply())
+	}
+
+	return errors.Join(errs...)
+}