8000 feat: add support for regexp in xpath replace function by Mrflatt · Pull Request #107 · antchfx/xpath · GitHub
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feat: add support for regexp in xpath replace function #107

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Merged
merged 1 commit into from
Feb 7, 2025
Merged

feat: add support for regexp in xpath replace function #107

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11 changes: 10 additions & 1 deletion func.go
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Original file line number Diff line number Diff line change
Expand Up @@ -564,8 +564,17 @@ func replaceFunc(arg1, arg2, arg3 query) func(query, iterator) interface{} {
str := asString(t, functionArgs(arg1).Evaluate(t))
src := asString(t, functionArgs(arg2).Evaluate(t))
dst := asString(t, functionArgs(arg3).Evaluate(t))
e, err := getRegexp(src)
if err != nil {
panic(fmt.Errorf("replace() function second argument is not a valid regexp pattern, err: %s", err.Error()))
}

// replace all $i to ${i} for golang regexp.Expand
for idx := e.NumSubexp(); idx > 0; idx-- {
dst = strings.ReplaceAll(dst, fmt.Sprintf("$%d", idx), fmt.Sprintf("${%d}", idx))
}

return strings.Replace(str, src, dst, -1)
return e.ReplaceAllString(str, dst)
}
}

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17 changes: 10 additions & 7 deletions xpath_function_test.go
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Expand Up @@ -195,13 +195,16 @@ func Test_func_replace(t *testing.T) {
test_xpath_eval(t, empty_example, `replace("abracadabra", "a", "")`, "brcdbr")
// The below xpath expressions is not supported yet
//
//test_xpath_eval(t, empty_example, `replace("abracadabra", "a.*a", "*")`, "*")
//test_xpath_eval(t, empty_example, `replace("abracadabra", "a.*?a", "*")`, "*c*bra")
//test_xpath_eval(t, empty_example, `replace("abracadabra", ".*?", "$1")`, "*c*bra") // error, because the pattern matches the zero-length string
//test_xpath_eval(t, empty_example, `replace("AAAA", "A+", "b")`, "b")
//test_xpath_eval(t, empty_example, `replace("AAAA", "A+?", "b")`, "bbb")
//test_xpath_eval(t, empty_example, `replace("darted", "^(.*?)d(.*)$", "$1c$2")`, "carted")
//test_xpath_eval(t, empty_example, `replace("abracadabra", "a(.)", "a$1$1")`, "abbraccaddabbra")
test_xpath_eval(t, empty_example, `replace("abracadabra", "a.*a", "*")`, "*")
test_xpath_eval(t, empty_example, `replace("abracadabra", "a.*?a", "*")`, "*c*bra")
// test_xpath_eval(t, empty_example, `replace("abracadabra", ".*?", "$1")`, "*c*bra") // error, because the pattern matches the zero-length string
test_xpath_eval(t, empty_example, `replace("AAAA", "A+", "b")`, "b")
test_xpath_eval(t, empty_example, `replace("AAAA", "A+?", "b")`, "bbbb")
test_xpath_eval(t, empty_example, `replace("darted", "^(.*?)d(.*)$", "$1c$2")`, "carted")
test_xpath_eval(t, empty_example, `replace("abracadabra", "a(.)", "a$1$1")`, "abbraccaddabbra")
test_xpath_eval(t, empty_example, `replace("abcd", "(ab)|(a)", "[1=$1][2=$2]")`, "[1=ab][2=]cd")
test_xpath_eval(t, empty_example, `replace("1/1/c11/1", "(.*)/[^/]+$", "$1")`, "1/1/c11")
test_xpath_eval(t, empty_example, `replace("A/B/C/D/E/F/G/H/I/J/K/L", "([^/]*)/([^/]*)/([^/]*)/([^/]*)/([^/]*)/([^/]*)/([^/]*)/([^/]*)/([^/]*)/(.*)", "$1-$2-$3-$4-$5-$6-$7-$8-$9-$10")`, "A-B-C-D-E-F-G-H-I-J/K/L")
}

func Test_func_reverse(t *testing.T) {
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