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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,118 @@ | ||
| // Copyright 2019-2025 Chris Mohan, Jaben Cargman | ||
| // and GotenbergSharpApiClient Contributors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| using System.Text.RegularExpressions; | ||
|
|
||
| namespace Gotenberg.Sharp.API.Client.Domain.Pages; | ||
|
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| public sealed class PageRanges : IEquatable<PageRanges> | ||
| { | ||
| private static readonly Regex PageRangePattern = | ||
| new(@"^\s*(\d+(-\d+)?)(\s*,\s*(\d+(-\d+)?))*\s*$"); | ||
|
|
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| private PageRanges(IReadOnlyCollection<int> pages) | ||
| { | ||
| Pages = pages.OrderBy(p => p).ToArray(); | ||
| } | ||
|
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| public static PageRanges All { get; } = new(Array.Empty<int>()); | ||
|
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| public IReadOnlyCollection<int> Pages { get; } | ||
|
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| public bool Equals(PageRanges? other) | ||
| { | ||
| return other is not null && Pages.SequenceEqual(other.Pages); | ||
| } | ||
|
|
||
| public static PageRanges Create(string? input) | ||
| { | ||
| if (string.IsNullOrWhiteSpace(input)) | ||
| { | ||
| return All; | ||
| } | ||
|
|
||
| if (!PageRangePattern.IsMatch(input)) | ||
| { | ||
| throw new ArgumentOutOfRangeException(nameof(input), | ||
| "Invalid page range format. Expected format: '1-5, 8, 11-13'."); | ||
| } | ||
|
|
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| var pages = new SortedSet<int>(); | ||
| foreach (var part in input!.Split([','], StringSplitOptions.RemoveEmptyEntries)) | ||
| { | ||
| var trimmed = part.Trim(); | ||
| if (trimmed.Contains('-')) | ||
| { | ||
| var bounds = trimmed.Split('-').Select(int.Parse).ToArray(); | ||
| if (bounds.Length == 2 && bounds[0] <= bounds[1]) | ||
| { | ||
| for (var i = bounds[0]; i <= bounds[1]; i++) | ||
| { | ||
| pages.Add(i); | ||
| } | ||
| } | ||
| } | ||
| else if (int.TryParse(trimmed, out var singlePage)) | ||
| { | ||
| pages.Add(singlePage); | ||
| } | ||
| } | ||
|
|
||
| return new PageRanges(pages); | ||
| } | ||
|
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| private string GetPageRangeString() | ||
| { | ||
| // empty is "all" | ||
| if (Pages.Count == 0) | ||
| { | ||
| return ""; | ||
| } | ||
|
|
||
| var ranges = new List<string>(); | ||
| int start = Pages.First(), end = start; | ||
|
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||
| foreach (var page in Pages.Skip(1)) | ||
| { | ||
| if (page == end + 1) | ||
| { | ||
| end = page; | ||
| } | ||
| else | ||
| { | ||
| ranges.Add(start == end ? start.ToString() : $"{start}-{end}"); | ||
| start = end = page; | ||
| } | ||
| } | ||
|
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| ranges.Add(start == end ? start.ToString() : $"{start}-{end}"); | ||
| return string.Join(", ", ranges); | ||
| } | ||
|
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| public override string ToString() | ||
| { | ||
| return GetPageRangeString(); | ||
| } | ||
|
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| public override bool Equals(object? obj) | ||
| { | ||
| return obj is PageRanges other && Pages.SequenceEqual(other.Pages); | ||
| } | ||
|
|
||
| public override int GetHashCode() | ||
| { | ||
| return Pages.Aggregate(0, (hash, page) => hash ^ page.GetHashCode()); | ||
| } | ||
| } |
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