Move a lot of stuff + tidy stuff (#37)

Lots of renaming and moving stuff, some bug fixes, more lenient parsing of notifications and home timeline.

internal/blob/local.go

@@ -0,0 +1,70 @@
+package blob
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+)
+
+// NewLocal returns an implementation of the Storage interface that uses
+// the local filesystem for storing and retrieving files, attachments, etc.
+func NewLocal(c *config.Config, log *logrus.Logger) (Storage, error) {
+	return &localStorage{
+		config: c,
+		log:    log,
+	}, nil
+}
+
+type localStorage struct {
+	config *config.Config
+	log    *logrus.Logger
+}
+
+func (s *localStorage) StoreFileAt(path string, data []byte) error {
+	l := s.log.WithField("func", "StoreFileAt")
+	l.Debugf("storing at path %s", path)
+	components := strings.Split(path, "/")
+	dir := strings.Join(components[0:len(components)-1], "/")
+	if err := os.MkdirAll(dir, 0777); err != nil {
+		return fmt.Errorf("error writing file at %s: %s", path, err)
+	}
+	if err := os.WriteFile(path, data, 0777); err != nil {
+		return fmt.Errorf("error writing file at %s: %s", path, err)
+	}
+	return nil
+}
+
+func (s *localStorage) RetrieveFileFrom(path string) ([]byte, error) {
+	l := s.log.WithField("func", "RetrieveFileFrom")
+	l.Debugf("retrieving from path %s", path)
+	b, err := os.ReadFile(path)
+	if err != nil {
+		return nil, fmt.Errorf("error reading file at %s: %s", path, err)
+	}
+	return b, nil
+}
+
+func (s *localStorage) ListKeys() ([]string, error) {
+	keys := []string{}
+	err := filepath.Walk(s.config.StorageConfig.BasePath, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if !info.IsDir() {
+			keys = append(keys, path)
+		}
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	return keys, nil
+}
+
+func (s *localStorage) RemoveFileAt(path string) error {
+	return os.Remove(path)
+}