-
Notifications
You must be signed in to change notification settings - Fork 99
/
UAParser.cs
756 lines (674 loc) · 28.8 KB
/
UAParser.cs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
#region Apache License, Version 2.0
//
// Copyright 2014 Atif Aziz
// Portions Copyright 2012 Søren Enemærke
//
// 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.
//
#endregion
using System.Reflection;
namespace UAParser
{
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
/// <summary>
/// Represents the physical device the user agent is using
/// </summary>
public sealed class Device
{
/// <summary>
/// Constructs a Device instance
/// </summary>
public Device(string family, string brand, string model)
{
Family = family.Trim();
if (brand != null)
Brand = brand.Trim();
if (model != null)
Model = model.Trim();
}
/// <summary>
/// Returns true if the device is likely to be a spider or a bot device
/// </summary>
public bool IsSpider => "Spider".Equals(Family, StringComparison.OrdinalIgnoreCase);
/// <summary>
///The brand of the device
/// </summary>
public string Brand { get; }
/// <summary>
/// The family of the device, if available
/// </summary>
public string Family { get; }
/// <summary>
/// The model of the device, if available
/// </summary>
public string Model { get; }
/// <summary>
/// A readable description of the device
/// </summary>
public override string ToString()
{
return Family;
}
}
/// <summary>
/// Represents the operating system the user agent runs on
/// </summary>
// ReSharper disable once InconsistentNaming
public sealed class OS
{
/// <summary>
/// Constructs an OS instance
/// </summary>
public OS(string family, string major, string minor, string patch, string patchMinor)
{
Family = family;
Major = major;
Minor = minor;
Patch = patch;
PatchMinor = patchMinor;
}
/// <summary>
/// The familiy of the OS
/// </summary>
public string Family { get; }
/// <summary>
/// The major version of the OS, if available
/// </summary>
public string Major { get; }
/// <summary>
/// The minor version of the OS, if available
/// </summary>
public string Minor { get; }
/// <summary>
/// The patch version of the OS, if available
/// </summary>
public string Patch { get; }
/// <summary>
/// The minor patch version of the OS, if available
/// </summary>
public string PatchMinor { get; }
/// <summary>
/// A readable description of the OS
/// </summary>
/// <returns></returns>
public override string ToString()
{
var version = VersionString.Format(Major, Minor, Patch, PatchMinor);
return Family + (!string.IsNullOrEmpty(version) ? " " + version : null);
}
}
/// <summary>
/// Represents a user agent, commonly a browser
/// </summary>
public sealed class UserAgent
{
/// <summary>
/// Construct a UserAgent instance
/// </summary>
public UserAgent(string family, string major, string minor, string patch)
{
Family = family;
Major = major;
Minor = minor;
Patch = patch;
}
/// <summary>
/// The family of user agent
/// </summary>
public string Family { get; }
/// <summary>
/// Major version of the user agent, if available
/// </summary>
public string Major { get; }
/// <summary>
/// Minor version of the user agent, if available
/// </summary>
public string Minor { get; }
/// <summary>
/// Patch version of the user agent, if available
/// </summary>
public string Patch { get; }
/// <summary>
/// The user agent as a readbale string
/// </summary>
/// <returns></returns>
public override string ToString()
{
var version = VersionString.Format(Major, Minor, Patch);
return Family + (!string.IsNullOrEmpty(version) ? " " + version : null);
}
}
internal static class VersionString
{
public static string Format(params string[] parts)
{
return string.Join(".", parts.Where(v => !String.IsNullOrEmpty(v)).ToArray());
}
}
/// <summary>
/// Representing the parse results. Structure of this class aligns with the
/// ua-parser-output WebIDL structure defined in this document: https://github.com/ua-parser/uap-core/blob/master/docs/specification.md
/// </summary>
public interface IUAParserOutput
{
/// <summary>
/// The user agent string, the input for the UAParser
/// </summary>
string String { get; }
/// <summary>
/// The OS parsed from the user agent string
/// </summary>
// ReSharper disable once InconsistentNaming
OS OS { get; }
/// <summary>
/// The Device parsed from the user agent string
/// </summary>
Device Device { get; }
// ReSharper disable once InconsistentNaming
/// <summary>
/// The User Agent parsed from the user agent string
/// </summary>
UserAgent UA { get; }
}
/// <summary>
/// Represents the user agent client information resulting from parsing
/// a user agent string
/// </summary>
public class ClientInfo : IUAParserOutput
{
/// <summary>
/// The user agent string, the input for the UAParser
/// </summary>
public string String { get; }
// ReSharper disable once InconsistentNaming
/// <summary>
/// The OS parsed from the user agent string
/// </summary>
// ReSharper disable once InconsistentNaming
public OS OS { get; }
/// <summary>
/// The Device parsed from the user agent string
/// </summary>
public Device Device { get; }
/// <summary>
/// The User Agent parsed from the user agent string
/// </summary>
[Obsolete("Mirrors the value of the UA property. Will be removed in future versions")]
public UserAgent UserAgent => UA;
// ReSharper disable once InconsistentNaming
/// <summary>
/// The User Agent parsed from the user agent string
/// </summary>
public UserAgent UA { get; }
/// <summary>
/// Constructs an instance of the ClientInfo with results of the user agent string parsing
/// </summary>
public ClientInfo(string inputString, OS os, Device device, UserAgent userAgent)
{
String = inputString;
OS = os;
Device = device;
UA = userAgent;
}
/// <summary>
/// A readable description of the user agent client information
/// </summary>
/// <returns></returns>
public override string ToString()
{
return $"{OS} {Device} {UA}";
}
}
/// <summary>
/// Options available for the parser
/// </summary>
public sealed class ParserOptions
{
#if REGEX_COMPILATION
/// <summary>
/// If true, will use compiled regular expressions for slower startup time
/// but higher throughput. The default is false.
/// </summary>
public bool UseCompiledRegex { get; set; }
#endif
#if REGEX_MATCHTIMEOUT
/// <summary>
/// Allows for specifying the maximum time spent on regular expressions,
/// serving as a fail safe for potential infinite backtracking. The default is
/// set to Regex.InfiniteMatchTimeout
/// </summary>
public TimeSpan MatchTimeOut { get; set; } = Regex.InfiniteMatchTimeout;
#endif
}
/// <summary>
/// Represents a parser of a user agent string
/// </summary>
public sealed class Parser
{
/// <summary>
/// The constant string value used to signal an unknown match for a given property or value. This
/// is by default the string "Other".
/// </summary>
public const string Other = "Other";
private readonly Func<string, OS> _osParser;
private readonly Func<string, Device> _deviceParser;
private readonly Func<string, UserAgent> _userAgentParser;
private Parser(MinimalYamlParser yamlParser, ParserOptions options)
{
var config = new Config(options ?? new ParserOptions());
_userAgentParser = CreateParser(Read(yamlParser.ReadMapping("user_agent_parsers"), config.UserAgentSelector), new UserAgent(Other, null, null, null));
_osParser = CreateParser(Read(yamlParser.ReadMapping("os_parsers"), config.OSSelector), new OS(Other, null, null, null, null));
_deviceParser = CreateParser(Read(yamlParser.ReadMapping("device_parsers"), config.DeviceSelector), new Device(Other, string.Empty, string.Empty));
}
private static IEnumerable<T> Read<T>(IEnumerable<Dictionary<string, string>> entries, Func<Func<string, string>, T> selector)
{
return from cm in entries select selector(cm.Find);
}
/// <summary>
/// Returns a <see cref="Parser"/> instance based on the regex definitions in a yaml string
/// </summary>
/// <param name="yaml">a string containing yaml definitions of reg-ex</param>
/// <param name="parserOptions">specifies the options for the parser</param>
/// <returns>A <see cref="Parser"/> instance parsing user agent strings based on the regexes defined in the yaml string</returns>
public static Parser FromYaml(string yaml, ParserOptions parserOptions = null)
{
return new Parser(new MinimalYamlParser(yaml), parserOptions);
}
/// <summary>
/// Returns a <see cref="Parser"/> instance based on the embedded regex definitions.
/// <remarks>The embedded regex definitions may be outdated. Consider passing in external yaml definitions using <see cref="Parser.FromYaml"/></remarks>
/// </summary>
/// <param name="parserOptions">specifies the options for the parser</param>
/// <returns></returns>
public static Parser GetDefault(ParserOptions parserOptions = null)
{
using (var stream = typeof(Parser)
#if INTROSPECTION_EXTENSIONS
.GetTypeInfo()
#endif
.Assembly.GetManifestResourceStream("UAParser.regexes.yaml"))
// ReSharper disable once AssignNullToNotNullAttribute
using (var reader = new StreamReader(stream))
return new Parser(new MinimalYamlParser(reader.ReadToEnd()), parserOptions);
}
/// <summary>
/// Parse a user agent string and obtain all client information
/// </summary>
public ClientInfo Parse(string uaString)
{
var os = ParseOS(uaString);
var device = ParseDevice(uaString);
var ua = ParseUserAgent(uaString);
return new ClientInfo(uaString, os, device, ua);
}
/// <summary>
/// Parse a user agent string and obtain the OS information
/// </summary>
public OS ParseOS(string uaString) { return _osParser(uaString); }
/// <summary>
/// Parse a user agent string and obtain the device information
/// </summary>
public Device ParseDevice(string uaString) { return _deviceParser(uaString); }
/// <summary>
/// Parse a user agent string and obtain the UserAgent information
/// </summary>
public UserAgent ParseUserAgent(string uaString) { return _userAgentParser(uaString); }
private static Func<string, T> CreateParser<T>(IEnumerable<Func<string, T>> parsers, T defaultValue) where T : class
{
return CreateParser(parsers, defaultValue, t => t);
}
private static Func<string, TResult> CreateParser<T, TResult>(IEnumerable<Func<string, T>> parsers, T defaultValue, Func<T, TResult> selector) where T : class
{
parsers = parsers?.ToArray() ?? Enumerable.Empty<Func<string, T>>();
return ua => selector(parsers.Select(p => p(ua)).FirstOrDefault(m => m != null) ?? defaultValue);
}
private class Config
{
private readonly ParserOptions _options;
internal Config(ParserOptions options)
{
_options = options;
}
// ReSharper disable once InconsistentNaming
public Func<string, OS> OSSelector(Func<string, string> indexer)
{
var regex = Regex(indexer, "OS");
var os = indexer("os_replacement");
var v1 = indexer("os_v1_replacement");
var v2 = indexer("os_v2_replacement");
var v3 = indexer("os_v3_replacement");
var v4 = indexer("os_v4_replacement");
return Parsers.OS(regex, os, v1, v2, v3, v4);
}
public Func<string, UserAgent> UserAgentSelector(Func<string, string> indexer)
{
var regex = Regex(indexer, "User agent");
var family = indexer("family_replacement");
var v1 = indexer("v1_replacement");
var v2 = indexer("v2_replacement");
var v3 = indexer("v3_replacement");
return Parsers.UserAgent(regex, family, v1, v2, v3);
}
public Func<string, Device> DeviceSelector(Func<string, string> indexer)
{
var regex = Regex(indexer, "Device", indexer("regex_flag"));
var device = indexer("device_replacement");
var brand = indexer("brand_replacement");
var model = indexer("model_replacement");
return Parsers.Device(regex, device, brand, model);
}
private Regex Regex(Func<string, string> indexer, string key, string regexFlag = null)
{
var pattern = indexer("regex");
if (pattern == null)
throw new Exception($"{key} is missing regular expression specification.");
// Some expressions in the regex.yaml file causes parsing errors
// in .NET such as the \_ token so need to alter them before
// proceeding.
if (pattern.IndexOf(@"\_", StringComparison.Ordinal) >= 0)
pattern = pattern.Replace(@"\_", "_");
//Singleline: User agent strings do not contain newline characters. RegexOptions.Singleline improves performance.
//CultureInvariant: The interpretation of a user agent never depends on the current locale.
RegexOptions options = RegexOptions.Singleline | RegexOptions.CultureInvariant;
if ("i".Equals(regexFlag))
{
options |= RegexOptions.IgnoreCase;
}
#if REGEX_COMPILATION
if (_options.UseCompiledRegex)
{
options |= RegexOptions.Compiled;
}
#endif
#if REGEX_MATCHTIMEOUT
return new Regex(pattern, options, _options.MatchTimeOut);
#else
return new Regex(pattern, options);
#endif
}
}
private static class Parsers
{
// ReSharper disable once InconsistentNaming
public static Func<string, OS> OS(Regex regex, string osReplacement, string v1Replacement, string v2Replacement, string v3Replacement, string v4Replacement)
{
// For variable replacements to be consistent the order of the linq statements are important ($1
// is only available to the first 'from X in Replace(..)' and so forth) so a a bit of conditional
// is required to get the creations to work. This is backed by unit tests
if (v1Replacement == "$1")
{
if (v2Replacement == "$2")
{
return Create(regex, from v1 in Replace(v1Replacement, "$1")
from v2 in Replace(v2Replacement, "$2")
from v3 in Replace(v3Replacement, "$3")
from v4 in Replace(v4Replacement, "$4")
from family in Replace(osReplacement, "$5")
select new OS(family, v1, v2, v3, v4));
}
return Create(regex, from v1 in Replace(v1Replacement, "$1")
from family in Replace(osReplacement, "$2")
from v2 in Replace(v2Replacement, "$3")
from v3 in Replace(v3Replacement, "$4")
from v4 in Replace(v4Replacement, "$5")
select new OS(family, v1, v2, v3, v4));
}
return Create(regex, from family in Replace(osReplacement, "$1")
from v1 in Replace(v1Replacement, "$2")
from v2 in Replace(v2Replacement, "$3")
from v3 in Replace(v3Replacement, "$4")
from v4 in Replace(v4Replacement, "$5")
select new OS(family, v1, v2, v3, v4));
}
public static Func<string, Device> Device(Regex regex, string familyReplacement, string brandReplacement, string modelReplacement)
{
return Create(regex, from family in ReplaceAll(familyReplacement)
from brand in ReplaceAll(brandReplacement)
from model in ReplaceAll(modelReplacement)
select new Device(family, brand, model));
}
public static Func<string, UserAgent> UserAgent(Regex regex, string familyReplacement, string majorReplacement, string minorReplacement, string patchReplacement)
{
return Create(regex, from family in Replace(familyReplacement, "$1")
from v1 in Replace(majorReplacement, "$2")
from v2 in Replace(minorReplacement, "$3")
from v3 in Replace(patchReplacement, "$4")
select new UserAgent(family, v1, v2, v3));
}
private static Func<Match, IEnumerator<int>, string> Replace(string replacement)
{
return replacement != null ? Select(_ => replacement) : Select();
}
private static Func<Match, IEnumerator<int>, string> Replace(
string replacement, string token)
{
return replacement != null && replacement.Contains(token)
? Select(s => s != null ? replacement.ReplaceFirstOccurence(token, s) : replacement)
: Replace(replacement);
}
private static readonly string[] _allReplacementTokens = new string[]
{
"$1","$2","$3","$4","$5","$6","$7","$8","$9",
};
private static Func<Match, IEnumerator<int>, string> ReplaceAll(string replacement)
{
if (replacement == null)
return Select();
string ReplaceFunction(string replacementString, string matchedGroup, string token)
{
return matchedGroup != null
? replacementString.ReplaceFirstOccurence(token, matchedGroup)
: replacementString;
}
return (m, num) =>
{
var finalString = replacement;
if (finalString.Contains("$"))
{
var groups = m.Groups;
for (int i = 0; i < _allReplacementTokens.Length; i++)
{
int tokenNumber = i + 1;
string token = _allReplacementTokens[i];
if (finalString.Contains(token))
{
var replacementText = string.Empty;
Group group;
if (tokenNumber <= groups.Count && (group = groups[tokenNumber]).Success)
replacementText = group.Value;
finalString = ReplaceFunction(finalString, replacementText, token);
}
if (!finalString.Contains("$"))
break;
}
}
return finalString;
};
}
private static Func<Match, IEnumerator<int>, string> Select()
{
return Select(v => v);
}
private static Func<Match, IEnumerator<int>, T> Select<T>(Func<string, T> selector)
{
return (m, num) =>
{
if (!num.MoveNext()) throw new InvalidOperationException();
var groups = m.Groups; Group group;
return selector(num.Current <= groups.Count && (group = groups[num.Current]).Success
? group.Value : null);
};
}
private static Func<string, T> Create<T>(Regex regex, Func<Match, IEnumerator<int>, T> binder)
{
return input =>
{
#if REGEX_MATCHTIMEOUT
try
{
var m = regex.Match(input);
var num = Generate(1, n => n + 1);
return m.Success ? binder(m, num) : default(T);
}
catch (RegexMatchTimeoutException)
{
// we'll simply swallow this exception and return the default (non-matched)
return default(T);
}
#else
var m = regex.Match(input);
var num = Generate(1, n => n + 1);
return m.Success ? binder(m, num) : default(T);
#endif
};
}
private static IEnumerator<T> Generate<T>(T initial, Func<T, T> next)
{
for (var state = initial; ; state = next(state))
yield return state;
// ReSharper disable once FunctionNeverReturns
}
}
}
internal static class RegexBinderBuilder
{
public static Func<Match, IEnumerator<int>, TResult> SelectMany<T1, T2, TResult>(
this Func<Match, IEnumerator<int>, T1> binder,
Func<T1, Func<Match, IEnumerator<int>, T2>> continuation,
Func<T1, T2, TResult> projection)
{
return (m, num) =>
{
T1 bound = binder(m, num);
T2 continued = continuation(bound)(m, num);
TResult projected = projection(bound, continued);
return projected;
};
}
}
internal static class StringExtensions
{
public static string ReplaceFirstOccurence(this string input, string search, string replacement)
{
if (input == null) throw new ArgumentNullException(nameof(input));
var index = input.IndexOf(search, StringComparison.Ordinal);
return index >= 0
? input.Substring(0, index) + replacement + input.Substring(index + search.Length)
: input;
}
}
internal static class DictionaryExtensions
{
public static TValue Find<TKey, TValue>(this IDictionary<TKey, TValue> dictionary, TKey key)
{
if (dictionary == null) throw new ArgumentNullException(nameof(dictionary));
return dictionary.TryGetValue(key, out var result) ? result : default(TValue);
}
}
/// <summary>
/// Just enough string parsing to recognize the regexes.yaml file format. Introduced to remove
/// dependency on large Yaml parsing lib. Note that a unittest ensures compatibility
/// by ensuring regexes and properties are read similar to using the full yaml lib
/// </summary>
internal class MinimalYamlParser
{
internal class Mapping
{
private Dictionary<string, string> _lastEntry;
public Mapping()
{
Sequences = new List<Dictionary<string, string>>();
}
public List<Dictionary<string, string>> Sequences { get; }
public void BeginSequence()
{
_lastEntry = new Dictionary<string, string>();
Sequences.Add(_lastEntry);
}
public void AddToSequence(string key, string value)
{
_lastEntry[key] = value;
}
}
private readonly Dictionary<string, Mapping> _mappings = new Dictionary<string, Mapping>();
public MinimalYamlParser(string yamlString)
{
ReadIntoMappingModel(yamlString);
}
internal IDictionary<string, Mapping> Mappings => _mappings;
private void ReadIntoMappingModel(string yamlInputString)
{
// line splitting using various splitting characters
string[] lines = yamlInputString.Split(new[] { Environment.NewLine, "\r", "\n", "\r\n" }, StringSplitOptions.RemoveEmptyEntries);
int lineCount = 0;
Mapping activeMapping = null;
foreach (var line in lines)
{
lineCount++;
if (line.Trim().StartsWith("#")) //skipping comments
continue;
if (line.Trim().Length == 0)
continue;
//is this a new mapping entity
if (line[0] != ' ')
{
int indexOfMappingColon = line.IndexOf(':');
if (indexOfMappingColon == -1)
throw new ArgumentException("YamlParsing: Expecting mapping entry to contain a ':', at line " + lineCount);
string name = line.Substring(0, indexOfMappingColon).Trim();
activeMapping = new Mapping();
_mappings.Add(name, activeMapping);
continue;
}
//reading scalar entries into the active mapping
if (activeMapping == null)
throw new ArgumentException("YamlParsing: Expecting mapping entry to contain a ':', at line " + lineCount);
var seqLine = line.Trim();
if (seqLine[0] == '-')
{
activeMapping.BeginSequence();
seqLine = seqLine.Substring(1);
}
int indexOfColon = seqLine.IndexOf(':');
if (indexOfColon == -1)
throw new ArgumentException("YamlParsing: Expecting scalar mapping entry to contain a ':', at line " + lineCount);
string key = seqLine.Substring(0, indexOfColon).Trim();
string value = ReadQuotedValue(seqLine.Substring(indexOfColon + 1).Trim());
activeMapping.AddToSequence(key, value);
}
}
private static string ReadQuotedValue(string value)
{
if (value.StartsWith("'") && value.EndsWith("'"))
return value.Substring(1, value.Length - 2);
if (value.StartsWith("\"") && value.EndsWith("\""))
return value.Substring(1, value.Length - 2);
return value;
}
public IEnumerable<Dictionary<string, string>> ReadMapping(string mappingName)
{
if (_mappings.TryGetValue(mappingName, out var mapping))
{
foreach (var s in mapping.Sequences)
{
var temp = s;
yield return temp;
}
}
}
}
}