rclone/backend/fichier/replace.go

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/*
Translate file names for 1fichier
1Fichier reserved characters
The following characters are 1Fichier reserved characters, and can't
be used in 1Fichier folder and file names.
*/
package fichier
import (
"regexp"
"strings"
)
// charMap holds replacements for characters
//
// 1Fichier 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 LESS-THAN SIGN
'>': '', // FULLWIDTH GREATER-THAN SIGN
'"': '', // FULLWIDTH QUOTATION MARK - not on the list but seems to be reserved
'\'': '', // FULLWIDTH APOSTROPHE
'$': '', // FULLWIDTH DOLLAR SIGN
'`': '', // FULLWIDTH GRAVE ACCENT
' ': '␠', // SYMBOL FOR SPACE
}
invCharMap map[rune]rune
fixStartingWithSpace = regexp.MustCompile(`(/|^) `)
)
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 {
// file names can't start with space either
in = fixStartingWithSpace.ReplaceAllString(in, "$1"+string(charMap[' ']))
// Replace reserved characters
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)
}