init: pristine aerc 0.20.0 source

worker/jmap/cache/blob.go

@@ -0,0 +1,45 @@
+package cache
+
+import (
+	"os"
+	"path"
+
+	"git.sr.ht/~rockorager/go-jmap"
+)
+
+func (c *JMAPCache) GetBlob(id jmap.ID) ([]byte, error) {
+	fpath := c.blobPath(id)
+	if fpath == "" {
+		return nil, notfound
+	}
+	return os.ReadFile(fpath)
+}
+
+func (c *JMAPCache) PutBlob(id jmap.ID, buf []byte) error {
+	fpath := c.blobPath(id)
+	if fpath == "" {
+		return nil
+	}
+	_ = os.MkdirAll(path.Dir(fpath), 0o700)
+	return os.WriteFile(fpath, buf, 0o600)
+}
+
+func (c *JMAPCache) DeleteBlob(id jmap.ID) error {
+	fpath := c.blobPath(id)
+	if fpath == "" {
+		return nil
+	}
+	defer func() {
+		_ = os.Remove(path.Dir(fpath))
+	}()
+	return os.Remove(fpath)
+}
+
+func (c *JMAPCache) blobPath(id jmap.ID) string {
+	if c.blobsDir == "" || id == "" {
+		return ""
+	}
+	name := string(id)
+	sub := name[len(name)-2:]
+	return path.Join(c.blobsDir, sub, name)
+}