mirror of
https://github.com/gohugoio/hugo.git
synced 2024-05-19 07:42:48 +00:00
116 lines
2.9 KiB
Go
116 lines
2.9 KiB
Go
// Copyright 2017 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package strings
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import (
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"github.com/gohugoio/hugo/common/hstrings"
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"github.com/spf13/cast"
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)
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// FindRE returns a list of strings that match the regular expression. By default all matches
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// will be included. The number of matches can be limited with an optional third parameter.
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func (ns *Namespace) FindRE(expr string, content any, limit ...any) ([]string, error) {
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re, err := hstrings.GetOrCompileRegexp(expr)
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if err != nil {
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return nil, err
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}
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conv, err := cast.ToStringE(content)
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if err != nil {
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return nil, err
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}
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if len(limit) == 0 {
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return re.FindAllString(conv, -1), nil
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}
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lim, err := cast.ToIntE(limit[0])
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if err != nil {
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return nil, err
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}
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return re.FindAllString(conv, lim), nil
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}
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// FindRESubmatch returns a slice of all successive matches of the regular
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// expression in content. Each element is a slice of strings holding the text
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// of the leftmost match of the regular expression and the matches, if any, of
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// its subexpressions.
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//
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// By default all matches will be included. The number of matches can be
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// limited with the optional limit parameter. A return value of nil indicates
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// no match.
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func (ns *Namespace) FindRESubmatch(expr string, content any, limit ...any) ([][]string, error) {
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re, err := hstrings.GetOrCompileRegexp(expr)
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if err != nil {
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return nil, err
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}
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conv, err := cast.ToStringE(content)
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if err != nil {
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return nil, err
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}
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n := -1
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if len(limit) > 0 {
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n, err = cast.ToIntE(limit[0])
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if err != nil {
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return nil, err
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}
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}
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return re.FindAllStringSubmatch(conv, n), nil
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}
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// ReplaceRE returns a copy of s, replacing all matches of the regular
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// expression pattern with the replacement text repl. The number of replacements
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// can be limited with an optional fourth parameter.
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func (ns *Namespace) ReplaceRE(pattern, repl, s any, n ...any) (_ string, err error) {
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sp, err := cast.ToStringE(pattern)
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if err != nil {
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return
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}
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sr, err := cast.ToStringE(repl)
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if err != nil {
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return
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}
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ss, err := cast.ToStringE(s)
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if err != nil {
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return
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}
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nn := -1
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if len(n) > 0 {
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nn, err = cast.ToIntE(n[0])
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if err != nil {
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return
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}
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}
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re, err := hstrings.GetOrCompileRegexp(sp)
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if err != nil {
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return "", err
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}
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return re.ReplaceAllStringFunc(ss, func(str string) string {
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if nn == 0 {
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return str
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}
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nn -= 1
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return re.ReplaceAllString(str, sr)
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}), nil
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}
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