1 files changed, 51 insertions, 0 deletions
diff --git a/storage.go b/storage.go
new file mode 100644
index 0000000..ec2d33e
--- /dev/null
+++ b/storage.go
@@ -0,0 +1,51 @@
+package main
+
+import (
+	"crypto/sha1"
+	"encoding/hex"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"sort"
+)
+
+type Storage struct {
+	Path string
+}
+
+func (s *Storage) MustInit() error {
+	os.Mkdir(s.Path, 0755)
+	os.Mkdir(s.Path+"/battles", 0755)
+	os.Mkdir(s.Path+"/tokens", 0700)
+	return nil
+}
+
+func (s *Storage) AddBattle(data []byte) (string, error) {
+	hash := sha1.Sum(data)
+	id := hex.EncodeToString(hash[:])
+	return id, ioutil.WriteFile(s.Path+"/battles/"+id, data, 0644)
+}
+
+func (s *Storage) ServeBattle(id string, w http.ResponseWriter, r *http.Request) {
+	w.Header().Add("Content-Type", "application/json")
+	http.ServeFile(w, r, s.Path+"/battles/"+id)
+}
+
+func (s *Storage) ListRecentBattles(count int) ([]Battle, error) {
+	files, err := ioutil.ReadDir(s.Path + "/battles")
+	if err != nil {
+		return nil, err
+	}
+
+	sort.Slice(files, func(lhs, rhs int) bool {
+		return files[lhs].ModTime().After(files[rhs].ModTime())
+	})
+
+	battles := make([]Battle, 0, count)
+
+	for i := 0; i < count && i < len(files); i++ {
+		battles = append(battles, Battle{Id: files[i].Name(), Date: files[i].ModTime()})
+	}
+
+	return battles, nil
+}