Initial commit

fstore/paths.go

@@ -0,0 +1,63 @@
+package fstore
+
+import (
+	"git.crumpington.com/public/jldb/lib/errs"
+	"path/filepath"
+	"strconv"
+)
+
+func filesRootPath(rootDir string) string {
+	return filepath.Clean(filepath.Join(rootDir, "files"))
+}
+
+func repDirPath(rootDir string) string {
+	return filepath.Clean(filepath.Join(rootDir, "rep"))
+}
+
+func tempDirPath(rootDir string) string {
+	return filepath.Clean(filepath.Join(rootDir, "tmp"))
+}
+
+func tempFilePath(inDir string, id uint64) string {
+	return filepath.Join(inDir, strconv.FormatUint(id, 10))
+}
+
+func validatePath(p string) error {
+	if len(p) == 0 {
+		return errs.InvalidPath.WithMsg("empty path")
+	}
+
+	if p[0] != '/' {
+		return errs.InvalidPath.WithMsg("path must be absolute")
+	}
+
+	for _, c := range p {
+		switch c {
+		case '/', '-', '_', '.':
+			continue
+		default:
+		}
+
+		if c >= 'a' && c <= 'z' {
+			continue
+		}
+
+		if c >= '0' && c <= '9' {
+			continue
+		}
+
+		return errs.InvalidPath.WithMsg("invalid character in path: %s", string([]rune{c}))
+	}
+	return nil
+}
+
+func cleanPath(p string) string {
+	if len(p) == 0 {
+		return "/"
+	}
+
+	if p[0] != '/' {
+		p = "/" + p
+	}
+	return filepath.Clean(p)
+}