| 1 | #nullable enable |
| 2 | |
| 3 | namespace CascadeIDE.Features.Chat; |
| 4 | |
| 5 | /// <summary> |
| 6 | /// Парсер multi-segment хвостов <c>[a;b] [c;d]</c> (ADR 0138) с legacy contiguous <c>3:5</c>, <c>3 5</c>, <c>5</c>. |
| 7 | /// </summary> |
| 8 | public static class ParametricSegmentListParser |
| 9 | { |
| 10 | public static bool TryParse( |
| 11 | string? argsTail, |
| 12 | out IReadOnlyList<ParametricIntRange> segments, |
| 13 | out string error) |
| 14 | { |
| 15 | segments = []; |
| 16 | error = ""; |
| 17 | |
| 18 | var tail = (argsTail ?? "").Trim(); |
| 19 | if (tail.Length == 0) |
| 20 | { |
| 21 | error = "Укажи диапазон: «5», «5 10», «5:10» или «[3;5] [8;15] [20]»."; |
| 22 | return false; |
| 23 | } |
| 24 | |
| 25 | if (tail.Contains('[')) |
| 26 | return TryParseBracketSegments(tail, out segments, out error); |
| 27 | |
| 28 | if (!ChatSlashParametricArgsBuilder.TryParseLineRangeTail(tail, out var start, out var end, out error)) |
| 29 | return false; |
| 30 | |
| 31 | segments = [new ParametricIntRange(start, end)]; |
| 32 | return true; |
| 33 | } |
| 34 | |
| 35 | public static bool TryParseSingleContiguous( |
| 36 | string? argsTail, |
| 37 | out ParametricIntRange range, |
| 38 | out string error) |
| 39 | { |
| 40 | range = default; |
| 41 | if (!TryParse(argsTail, out var segments, out error)) |
| 42 | return false; |
| 43 | |
| 44 | if (segments.Count != 1) |
| 45 | { |
| 46 | error = segments.Count == 0 |
| 47 | ? "Пустой диапазон." |
| 48 | : "Ожидается один contiguous сегмент (например 3:5). Для disjoint используйте [3;5] [8;15]."; |
| 49 | return false; |
| 50 | } |
| 51 | |
| 52 | range = segments[0]; |
| 53 | return true; |
| 54 | } |
| 55 | |
| 56 | public static string FormatSummary(IReadOnlyList<ParametricIntRange> segments, string unitLabel) |
| 57 | { |
| 58 | if (segments.Count == 0) |
| 59 | return ""; |
| 60 | |
| 61 | var parts = new List<string>(segments.Count); |
| 62 | var total = 0; |
| 63 | foreach (var segment in segments) |
| 64 | { |
| 65 | total += segment.InclusiveCount; |
| 66 | parts.Add(segment.Start == segment.End |
| 67 | ? $"{segment.Start}" |
| 68 | : $"{segment.Start}–{segment.End}"); |
| 69 | } |
| 70 | |
| 71 | var joined = string.Join(", ", parts); |
| 72 | return segments.Count == 1 && segments[0].Start == segments[0].End |
| 73 | ? $"{unitLabel}: {joined}" |
| 74 | : $"{unitLabel}: {joined} ({total} {PluralUnit(total, unitLabel)})"; |
| 75 | } |
| 76 | |
| 77 | private static string PluralUnit(int count, string unitLabel) |
| 78 | { |
| 79 | var key = unitLabel.Trim().ToLowerInvariant(); |
| 80 | return key switch |
| 81 | { |
| 82 | "строки" or "строка" => count == 1 ? "строка" : "строк", |
| 83 | "сообщения" or "сообщение" => count == 1 ? "сообщение" : "сообщений", |
| 84 | _ => count == 1 ? unitLabel.TrimEnd('и') : unitLabel, |
| 85 | }; |
| 86 | } |
| 87 | |
| 88 | private static bool TryParseBracketSegments( |
| 89 | string tail, |
| 90 | out IReadOnlyList<ParametricIntRange> segments, |
| 91 | out string error) |
| 92 | { |
| 93 | var list = new List<ParametricIntRange>(); |
| 94 | var i = 0; |
| 95 | while (i < tail.Length) |
| 96 | { |
| 97 | while (i < tail.Length && char.IsWhiteSpace(tail[i])) |
| 98 | i++; |
| 99 | |
| 100 | if (i >= tail.Length) |
| 101 | break; |
| 102 | |
| 103 | if (tail[i] != '[') |
| 104 | { |
| 105 | error = "Сегменты disjoint задаются только в скобках: [3;5] [8;15]. Legacy «3:5» — без скобок."; |
| 106 | segments = []; |
| 107 | return false; |
| 108 | } |
| 109 | |
| 110 | var close = tail.IndexOf(']', i + 1); |
| 111 | if (close < 0) |
| 112 | { |
| 113 | error = "Незакрытая «[» в сегменте."; |
| 114 | segments = []; |
| 115 | return false; |
| 116 | } |
| 117 | |
| 118 | var inner = tail[(i + 1)..close].Trim(); |
| 119 | if (!TryParseBracketInner(inner, out var range, out error)) |
| 120 | { |
| 121 | segments = []; |
| 122 | return false; |
| 123 | } |
| 124 | |
| 125 | list.Add(range); |
| 126 | i = close + 1; |
| 127 | } |
| 128 | |
| 129 | if (list.Count == 0) |
| 130 | { |
| 131 | error = "Нет сегментов в скобках."; |
| 132 | segments = []; |
| 133 | return false; |
| 134 | } |
| 135 | |
| 136 | segments = list; |
| 137 | error = ""; |
| 138 | return true; |
| 139 | } |
| 140 | |
| 141 | private static bool TryParseBracketInner(string inner, out ParametricIntRange range, out string error) |
| 142 | { |
| 143 | range = default; |
| 144 | error = ""; |
| 145 | |
| 146 | if (inner.Length == 0) |
| 147 | { |
| 148 | error = "Пустой сегмент []."; |
| 149 | return false; |
| 150 | } |
| 151 | |
| 152 | var parts = inner.Split(';', StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries); |
| 153 | if (parts.Length is < 1 or > 2) |
| 154 | { |
| 155 | error = "Внутри [] ожидается одно число [20] или пара [3;5]."; |
| 156 | return false; |
| 157 | } |
| 158 | |
| 159 | if (!int.TryParse(parts[0], out var start) || start < 1) |
| 160 | { |
| 161 | error = $"Некорректное число «{parts[0]}»."; |
| 162 | return false; |
| 163 | } |
| 164 | |
| 165 | if (parts.Length == 1) |
| 166 | { |
| 167 | range = new ParametricIntRange(start, start); |
| 168 | return true; |
| 169 | } |
| 170 | |
| 171 | if (!int.TryParse(parts[1], out var end) || end < 1) |
| 172 | { |
| 173 | error = $"Некорректное число «{parts[1]}»."; |
| 174 | return false; |
| 175 | } |
| 176 | |
| 177 | if (end < start) |
| 178 | { |
| 179 | error = "Конец сегмента не может быть меньше начала."; |
| 180 | return false; |
| 181 | } |
| 182 | |
| 183 | range = new ParametricIntRange(start, end); |
| 184 | return true; |
| 185 | } |
| 186 | } |
| 187 | |