b1e6949fe4
Trim-based formula detection skipped the old rule for leading control characters; check those bytes before trim. Signed-off-by: Cursor Agent <cursoragent@cursor.com> Co-authored-by: Bryan FRIMIN <bryan@frimin.fr>
86 lines
2.3 KiB
Go
86 lines
2.3 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@probo.com>.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package safecsv
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import (
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"strings"
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"unicode"
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"unicode/utf8"
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)
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// SanitizeRecord returns a copy of record with spreadsheet-safe cell values.
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func SanitizeRecord(record []string) []string {
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if len(record) == 0 {
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return record
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}
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out := make([]string, len(record))
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for i, field := range record {
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out[i] = SanitizeCell(field)
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}
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return out
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}
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// SanitizeCell prefixes values that spreadsheet tools may interpret as formulas.
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// Leading spaces are ignored for formula detection only; tab and carriage return
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// at the start are always escaped. The written cell keeps the original text with
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// a leading single-quote when sanitization applies.
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func SanitizeCell(value string) string {
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if value == "" {
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return value
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}
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if spreadsheetLeadingControl(value[0]) {
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return "'" + value
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}
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trimmed := strings.TrimLeftFunc(value, unicode.IsSpace)
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if trimmed == "" {
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return value
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}
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r, _ := utf8.DecodeRuneInString(trimmed)
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if formulaLeadingRune(r) {
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return "'" + value
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}
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return value
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}
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func spreadsheetLeadingControl(b byte) bool {
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switch b {
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case '\t', '\r':
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return true
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default:
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return false
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}
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}
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func formulaLeadingRune(r rune) bool {
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switch r {
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case '=', '+', '-', '@', '\\', '|', '%':
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return true
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default:
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return false
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}
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}
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