mirror of https://github.com/stashapp/stash.git
113 lines
3.1 KiB
Go
113 lines
3.1 KiB
Go
/*
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https://github.com/facette/natsort
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Copyright (c) 2015, Vincent Batoufflet and Marc Falzon
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the authors nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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package utils
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import (
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"regexp"
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"sort"
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"strconv"
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)
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type naturalStringSlice []string
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func (s naturalStringSlice) Len() int {
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return len(s)
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}
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func (s naturalStringSlice) Less(a, b int) bool {
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return NaturalCompare(s[a], s[b])
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}
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func (s naturalStringSlice) Swap(a, b int) {
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s[a], s[b] = s[b], s[a]
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}
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var chunkifyRegexp = regexp.MustCompile(`(\d+|\D+)`)
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func chunkify(s string) []string {
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return chunkifyRegexp.FindAllString(s, -1)
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}
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func NaturalSort(l []string) {
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sort.Sort(naturalStringSlice(l))
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}
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func NaturalCompare(a, b string) bool {
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chunksA := chunkify(a)
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chunksB := chunkify(b)
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nChunksA := len(chunksA)
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nChunksB := len(chunksB)
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for i := range chunksA {
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if i >= nChunksB {
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return false
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}
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aInt, aErr := strconv.Atoi(chunksA[i])
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bInt, bErr := strconv.Atoi(chunksB[i])
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// If both chunks are numeric, compare them as integers
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if aErr == nil && bErr == nil {
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if aInt == bInt {
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if i == nChunksA-1 {
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// We reached the last chunk of A, thus B is greater than A
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return true
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} else if i == nChunksB-1 {
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// We reached the last chunk of B, thus A is greater than B
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return false
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}
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continue
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}
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return aInt < bInt
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}
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// So far both strings are equal, continue to next chunk
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if chunksA[i] == chunksB[i] {
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if i == nChunksA-1 {
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// We reached the last chunk of A, thus B is greater than A
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return true
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} else if i == nChunksB-1 {
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// We reached the last chunk of B, thus A is greater than B
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return false
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}
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continue
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}
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return chunksA[i] < chunksB[i]
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}
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return false
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}
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