overdue

.rclone_repo/backend/opendrive/replace.go

@@ -0,0 +1,78 @@
+/*
+Translate file names for OpenDrive
+
+OpenDrive reserved characters
+
+The following characters are OpenDrive reserved characters, and can't
+be used in OpenDrive folder and file names.
+
+\ / : * ? " < > |
+
+OpenDrive files and folders can't have leading or trailing spaces also.
+
+*/
+
+package opendrive
+
+import (
+	"regexp"
+	"strings"
+)
+
+// charMap holds replacements for characters
+//
+// OpenDrive has a restricted set of characters compared to other cloud
+// storage systems, so we to map these to the FULLWIDTH unicode
+// equivalents
+//
+// http://unicode-search.net/unicode-namesearch.pl?term=SOLIDUS
+var (
+	charMap = map[rune]rune{
+		'\\': '＼', // FULLWIDTH REVERSE SOLIDUS
+		':':  '：', // FULLWIDTH COLON
+		'*':  '＊', // FULLWIDTH ASTERISK
+		'?':  '？', // FULLWIDTH QUESTION MARK
+		'"':  '＂', // FULLWIDTH QUOTATION MARK
+		'<':  '＜', // FULLWIDTH LESS-THAN SIGN
+		'>':  '＞', // FULLWIDTH GREATER-THAN SIGN
+		'|':  '｜', // FULLWIDTH VERTICAL LINE
+		' ':  '␠', // SYMBOL FOR SPACE
+	}
+	fixStartingWithSpace = regexp.MustCompile(`(/|^) `)
+	fixEndingWithSpace   = regexp.MustCompile(` (/|$)`)
+	invCharMap           map[rune]rune
+)
+
+func init() {
+	// Create inverse charMap
+	invCharMap = make(map[rune]rune, len(charMap))
+	for k, v := range charMap {
+		invCharMap[v] = k
+	}
+}
+
+// replaceReservedChars takes a path and substitutes any reserved
+// characters in it
+func replaceReservedChars(in string) string {
+	// Filenames can't start with space
+	in = fixStartingWithSpace.ReplaceAllString(in, "$1"+string(charMap[' ']))
+	// Filenames can't end with space
+	in = fixEndingWithSpace.ReplaceAllString(in, string(charMap[' '])+"$1")
+	return strings.Map(func(c rune) rune {
+		if replacement, ok := charMap[c]; ok && c != ' ' {
+			return replacement
+		}
+		return c
+	}, in)
+}
+
+// restoreReservedChars takes a path and undoes any substitutions
+// made by replaceReservedChars
+func restoreReservedChars(in string) string {
+	return strings.Map(func(c rune) rune {
+		if replacement, ok := invCharMap[c]; ok {
+			return replacement
+		}
+		return c
+	}, in)
+}