buildSanitizePreservePattern builds a regex character class of allowed characters.
(opts *SanitizeOptions)
| 132 | |
| 133 | // buildSanitizePreservePattern builds a regex character class of allowed characters. |
| 134 | func buildSanitizePreservePattern(opts *SanitizeOptions) string { |
| 135 | preserveDot := false |
| 136 | preserveUnderscore := false |
| 137 | for _, char := range opts.PreserveSpecialChars { |
| 138 | switch char { |
| 139 | case '.': |
| 140 | preserveDot = true |
| 141 | case '_': |
| 142 | preserveUnderscore = true |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | var preserveChars strings.Builder |
| 147 | preserveChars.WriteString("a-z0-9-") // Always preserve alphanumeric and hyphens |
| 148 | if preserveDot { |
| 149 | preserveChars.WriteRune('.') |
| 150 | } |
| 151 | if preserveUnderscore { |
| 152 | preserveChars.WriteRune('_') |
| 153 | } |
| 154 | return preserveChars.String() |
| 155 | } |
| 156 | |
| 157 | // applySanitizePattern removes or replaces characters not in the allowed set. |
| 158 | // When the caller has requested preservation of special chars, unwanted chars are |