Add 'thumbnails/' from commit '2ebf7b2f23af96b3b499c401fe5498a9349403d8'

git-subtree-dir: thumbnails
git-subtree-mainline: ccc651a11e
git-subtree-split: 2ebf7b2f23

thumbnails/pkg/thumbnail/storage/inmemory.go

@@ -0,0 +1,46 @@
+package storage
+
+import (
+	"strings"
+)
+
+// NewInMemoryStorage creates a new InMemory instance.
+func NewInMemoryStorage() InMemory {
+	return InMemory{
+		store: make(map[string]map[string][]byte),
+	}
+}
+
+// InMemory represents an in memory storage for thumbnails
+// Can be used during development
+type InMemory struct {
+	store map[string]map[string][]byte
+}
+
+// Get loads the thumbnail from memory.
+func (s InMemory) Get(username string, key string) []byte {
+	userImages := s.store[username]
+	if userImages == nil {
+		return nil
+	}
+	return s.store[username][key]
+}
+
+// Set stores the thumbnail in memory.
+func (s InMemory) Set(username string, key string, thumbnail []byte) error {
+	if _, ok := s.store[username]; !ok {
+		s.store[username] = make(map[string][]byte)
+	}
+	s.store[username][key] = thumbnail
+	return nil
+}
+
+// BuildKey generates a unique key to store and retrieve the thumbnail.
+func (s InMemory) BuildKey(r Request) string {
+	parts := []string{
+		r.ETag,
+		r.Resolution.String(),
+		strings.Join(r.Types, ","),
+	}
+	return strings.Join(parts, "+")
+}