| | | 1 | | using Fluorite.Strainer.Exceptions; |
| | | 2 | | using Fluorite.Strainer.Models; |
| | | 3 | | using Fluorite.Strainer.Services.Filtering; |
| | | 4 | | using Fluorite.Strainer.Services.Linq; |
| | | 5 | | using Fluorite.Strainer.Services.Metadata; |
| | | 6 | | using System.Linq.Expressions; |
| | | 7 | | |
| | | 8 | | namespace Fluorite.Strainer.Services.Pipelines; |
| | | 9 | | |
| | | 10 | | public class FilterPipelineOperation : IFilterPipelineOperation, IStrainerPipelineOperation |
| | | 11 | | { |
| | | 12 | | private readonly ICustomFilteringExpressionProvider _customFilteringExpressionProvider; |
| | | 13 | | private readonly IFilterExpressionProvider _filterExpressionProvider; |
| | | 14 | | private readonly IQueryableEvaluator _queryableEvaluator; |
| | | 15 | | private readonly IFilterTermParser _filterTermParser; |
| | | 16 | | private readonly IMetadataFacade _metadataFacade; |
| | | 17 | | private readonly IStrainerOptionsProvider _strainerOptionsProvider; |
| | | 18 | | |
| | 9 | 19 | | public FilterPipelineOperation( |
| | 9 | 20 | | ICustomFilteringExpressionProvider customFilteringExpressionProvider, |
| | 9 | 21 | | IFilterExpressionProvider filterExpressionProvider, |
| | 9 | 22 | | IQueryableEvaluator queryableEvaluator, |
| | 9 | 23 | | IFilterTermParser filterTermParser, |
| | 9 | 24 | | IMetadataFacade metadataFacade, |
| | 9 | 25 | | IStrainerOptionsProvider strainerOptionsProvider) |
| | | 26 | | { |
| | 9 | 27 | | _customFilteringExpressionProvider = Guard.Against.Null(customFilteringExpressionProvider); |
| | 9 | 28 | | _filterExpressionProvider = Guard.Against.Null(filterExpressionProvider); |
| | 9 | 29 | | _queryableEvaluator = Guard.Against.Null(queryableEvaluator); |
| | 9 | 30 | | _filterTermParser = Guard.Against.Null(filterTermParser); |
| | 9 | 31 | | _metadataFacade = Guard.Against.Null(metadataFacade); |
| | 9 | 32 | | _strainerOptionsProvider = Guard.Against.Null(strainerOptionsProvider); |
| | 9 | 33 | | } |
| | | 34 | | |
| | | 35 | | public IQueryable<T> Execute<T>(IStrainerModel model, IQueryable<T> source) |
| | | 36 | | { |
| | 8 | 37 | | Guard.Against.Null(model); |
| | 8 | 38 | | Guard.Against.Null(source); |
| | | 39 | | |
| | 8 | 40 | | var options = _strainerOptionsProvider.GetStrainerOptions(); |
| | 8 | 41 | | var parsedTerms = _filterTermParser.GetParsedTerms(model.Filters); |
| | 8 | 42 | | if (parsedTerms.Count == 0) |
| | | 43 | | { |
| | 1 | 44 | | return source; |
| | | 45 | | } |
| | | 46 | | |
| | 7 | 47 | | var isMaterializedQueryable = _queryableEvaluator.IsMaterialized(source); |
| | 7 | 48 | | Expression? outerExpression = null; |
| | 7 | 49 | | var parameterExpression = Expression.Parameter(typeof(T), "e"); |
| | 28 | 50 | | foreach (var filterTerm in parsedTerms) |
| | | 51 | | { |
| | 8 | 52 | | Expression? termExpression = null; |
| | 32 | 53 | | foreach (var filterTermName in filterTerm.Names) |
| | | 54 | | { |
| | 9 | 55 | | var metadata = _metadataFacade.GetMetadata<T>( |
| | 9 | 56 | | isSortableRequired: false, |
| | 9 | 57 | | isFilterableRequired: true, |
| | 9 | 58 | | name: filterTermName); |
| | | 59 | | |
| | | 60 | | try |
| | | 61 | | { |
| | 9 | 62 | | if (metadata is not null) |
| | | 63 | | { |
| | 6 | 64 | | termExpression = _filterExpressionProvider.GetExpression(metadata, filterTerm, parameterExpressi |
| | | 65 | | } |
| | | 66 | | else |
| | | 67 | | { |
| | 3 | 68 | | if (_customFilteringExpressionProvider.TryGetCustomExpression<T>(filterTerm, filterTermName, out |
| | | 69 | | { |
| | 1 | 70 | | source = source.Where(customExpression); |
| | | 71 | | } |
| | | 72 | | else |
| | | 73 | | { |
| | 2 | 74 | | throw new StrainerFilterNotFoundException( |
| | 2 | 75 | | filterTermName, |
| | 2 | 76 | | $"Property or custom filter method '{filterTermName}' was not found."); |
| | | 77 | | } |
| | | 78 | | } |
| | 7 | 79 | | } |
| | 2 | 80 | | catch (StrainerException) when (!options.ThrowExceptions) |
| | | 81 | | { |
| | 1 | 82 | | return source; |
| | | 83 | | } |
| | | 84 | | } |
| | | 85 | | |
| | 6 | 86 | | if (termExpression is not null) |
| | | 87 | | { |
| | 4 | 88 | | if (outerExpression is null) |
| | | 89 | | { |
| | 3 | 90 | | outerExpression = termExpression; |
| | | 91 | | } |
| | | 92 | | else |
| | | 93 | | { |
| | 1 | 94 | | outerExpression = Expression.And(outerExpression, termExpression); |
| | | 95 | | } |
| | | 96 | | } |
| | | 97 | | } |
| | | 98 | | |
| | 5 | 99 | | if (outerExpression is null) |
| | | 100 | | { |
| | 2 | 101 | | return source; |
| | | 102 | | } |
| | | 103 | | |
| | 3 | 104 | | var lambdaExpression = Expression.Lambda<Func<T, bool>>(outerExpression, parameterExpression); |
| | | 105 | | |
| | 3 | 106 | | return source.Where(lambdaExpression); |
| | 1 | 107 | | } |
| | | 108 | | } |