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+//
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+// ORSKUDataFilter.m
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+// SKUFilterfilter
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+//
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+// Created by OrangesAL on 2017/12/3.
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+// Copyright © 2017年 OrangesAL. All rights reserved.
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+//
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+
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+#import "ORSKUDataFilter.h"
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+
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+@interface ORSKUDataFilter() {
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+ ORSKUCondition *_defaultSku;
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+}
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+
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+@property (nonatomic, strong) NSSet <ORSKUCondition *> *conditions;
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+
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+@property (nonatomic, strong) NSMutableArray <NSIndexPath *> *selectedIndexPaths;
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+
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+@property (nonatomic, strong) NSMutableSet <NSIndexPath *> *availableIndexPathsSet;
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+
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+//全可用的
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+@property (nonatomic, strong) NSSet <NSIndexPath *> *allAvailableIndexPaths;
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+
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+@property (nonatomic, strong) id currentResult;
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+
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+@end
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+
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+@implementation ORSKUDataFilter
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+
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+- (instancetype)initWithDataSource:(id<ORSKUDataFilterDataSource>)dataSource
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+{
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+ self = [super init];
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+ if (self) {
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+ _dataSource = dataSource;
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+ _selectedIndexPaths = [NSMutableArray array];
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+ [self initPropertiesSkuListData];
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+ }
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+ return self;
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+}
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+
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+- (instancetype)init
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+{
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+ self = [super init];
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+ if (self) {
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+ _selectedIndexPaths = [NSMutableArray array];
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+ }
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+ return self;
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+}
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+
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+- (void)reloadData {
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+ [_selectedIndexPaths removeAllObjects];
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+ _defaultSku = nil;
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+ [self initPropertiesSkuListData];
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+ [self updateCurrentResult];
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+}
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+
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+#pragma mark -- public method
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+//选中某个属性
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+- (void)didSelectedPropertyWithIndexPath:(NSIndexPath *)indexPath {
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+
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+ if (![_availableIndexPathsSet containsObject:indexPath]) {
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+ //不可选
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+ return;
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+ }
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+
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+ if (indexPath.section > [_dataSource numberOfSectionsForPropertiesInFilter:self] || indexPath.item >= [[_dataSource filter:self propertiesInSection:indexPath.section] count]) {
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+ //越界
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+ NSLog(@"indexPath is out of range");
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+ return;
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+ }
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+
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+ if ([_selectedIndexPaths containsObject:indexPath]) {
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+ //已被选
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+ [_selectedIndexPaths removeObject:indexPath];
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+
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+ [self updateAvailableIndexPaths];
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+ [self updateCurrentResult];
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+ return;
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+ }
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+
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+ __block NSIndexPath *lastIndexPath = nil;
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+
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+ [_selectedIndexPaths enumerateObjectsUsingBlock:^(NSIndexPath * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
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+ if (indexPath.section == obj.section) {
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+ lastIndexPath = obj;
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+ }
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+ }];
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+
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+ if (!lastIndexPath) {
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+ //添加新属性
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+ [_selectedIndexPaths addObject:indexPath];
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+ [_availableIndexPathsSet intersectSet:[self availableIndexPathsFromSelctedIndexPath:indexPath sectedIndexPaths:_selectedIndexPaths]];
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+ [self updateCurrentResult];
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+ return;
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+ }
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+
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+ if (lastIndexPath.item != indexPath.item) {
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+ //切换属性
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+ [_selectedIndexPaths addObject:indexPath];
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+ [_selectedIndexPaths removeObject:lastIndexPath];
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+ [self updateAvailableIndexPaths];
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+ [self updateCurrentResult];
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+ }
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+
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+}
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+
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+
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+#pragma mark -- private method
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+
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+//获取初始数据
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+- (void)initPropertiesSkuListData {
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+
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+ NSMutableSet *modelSet = [NSMutableSet set];
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+
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+ for (int i = 0; i < [_dataSource numberOfConditionsInFilter:self]; i ++) {
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+
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+ ORSKUCondition *model = [ORSKUCondition new];
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+ NSArray * conditions = [_dataSource filter:self conditionForRow:i];
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+
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+ if (![self checkConformToSkuConditions:conditions]) {
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+ NSLog(@"第 %d 个 condition 不完整 \n %@", i, conditions);
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+ continue;
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+ }
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+
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+ model.properties = [self propertiesWithConditionRawData:conditions];
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+ model.result = [_dataSource filter:self resultOfConditionForRow:i];
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+
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+ if (self.selectedIndexPaths.count == 0 && _needDefaultValue && !_defaultSku) {
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+ _defaultSku = model;
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+ }
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+
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+ [modelSet addObject:model];
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+ }
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+ _conditions = [modelSet copy];
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+
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+ [self getAllAvailableIndexPaths];
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+
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+ if (_defaultSku) {
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+ [_defaultSku.properties enumerateObjectsUsingBlock:^(ORSKUProperty * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
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+ [self didSelectedPropertyWithIndexPath:obj.indexPath];
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+ }];
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+ }
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+}
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+
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+//检查数据是否正确
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+- (BOOL)checkConformToSkuConditions:(NSArray *)conditions {
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+ if (conditions.count != [_dataSource numberOfSectionsForPropertiesInFilter:self]) {
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+ return NO;
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+ }
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+
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+ __block BOOL flag = YES;
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+ [conditions enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
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+ NSArray *properties = [self.dataSource filter:self propertiesInSection:idx];
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+ if (![properties containsObject:obj]) {
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+ flag = NO;
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+ *stop = YES;
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+ }
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+ }];
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+ return flag;
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+}
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+
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+//获取属性
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+- (NSArray<ORSKUProperty *> *)propertiesWithConditionRawData:(NSArray *)data {
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+
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+ NSMutableArray *array = [NSMutableArray array];
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+ [data enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
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+ [array addObject:[self propertyOfValue:obj inSection:idx]];
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+ }];
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+
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+ return array;
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+}
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+
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+- (ORSKUProperty *)propertyOfValue:(id)value inSection:(NSInteger)section {
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+
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+ NSArray *properties = [_dataSource filter:self propertiesInSection:section];
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+
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+ NSString *str = [NSString stringWithFormat:@"Properties for %ld dosen‘t exist %@", (long)section, value];
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+ NSAssert([properties containsObject:value], str);
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+
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+ NSIndexPath *indexPath = [NSIndexPath indexPathForItem:[properties indexOfObject:value] inSection:section];
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+
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+ return [[ORSKUProperty alloc] initWithValue:value indexPath:indexPath];
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+}
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+
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+//获取条件式 对应 的数据
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+- (id)skuResultWithConditionIndexs:(NSArray<NSNumber *> *)conditionIndexs {
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+
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+ __block id result = nil;
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+
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+ [_conditions enumerateObjectsUsingBlock:^(ORSKUCondition * _Nonnull obj, BOOL * _Nonnull stop) {
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+
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+ if ([obj.conditionIndexs isEqual:conditionIndexs]) {
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+ result = obj.result;
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+ *stop = YES;
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+ }
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+ }];
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+
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+ return result;
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+}
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+
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+//获取初始可选的所有IndexPath
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+- (NSMutableSet<NSIndexPath *> *)getAllAvailableIndexPaths {
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+
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+ NSMutableSet *set = [NSMutableSet set];
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+ [_conditions enumerateObjectsUsingBlock:^(ORSKUCondition * _Nonnull obj, BOOL * _Nonnull stop) {
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+ [obj.conditionIndexs enumerateObjectsUsingBlock:^(NSNumber * _Nonnull obj1, NSUInteger idx1, BOOL * _Nonnull stop1) {
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+ [set addObject:[NSIndexPath indexPathForItem:obj1.integerValue inSection:idx1]];
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+ }];
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+ }];
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+
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+ _availableIndexPathsSet = set;
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+
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+ _allAvailableIndexPaths = [set copy];
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+
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+ return set;
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+}
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+
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+//选中某个属性时 根据已选中的系列属性 获取可选的IndexPath
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+- (NSMutableSet<NSIndexPath *> *)availableIndexPathsFromSelctedIndexPath:(NSIndexPath *)selectedIndexPath sectedIndexPaths:(NSArray<NSIndexPath *> *)indexPaths{
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+
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+ NSMutableSet *set = [NSMutableSet set];
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+ [_conditions enumerateObjectsUsingBlock:^(ORSKUCondition * _Nonnull obj, BOOL * _Nonnull stop) {
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+ if ([obj.conditionIndexs objectAtIndex:selectedIndexPath.section].integerValue == selectedIndexPath.item) {
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+
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+ [obj.properties enumerateObjectsUsingBlock:^(ORSKUProperty * _Nonnull property, NSUInteger idx2, BOOL * _Nonnull stop1) {
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+
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+ //从condition中添加种类不同的属性时，需要根据已选中的属性过滤
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+ //过滤方式为 condition要么包含已选中 要么和已选中属性是同级
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+ if (property.indexPath.section != selectedIndexPath.section) {
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+
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+ __block BOOL flag = YES;
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+
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+ [indexPaths enumerateObjectsUsingBlock:^(NSIndexPath * _Nonnull obj1, NSUInteger idx, BOOL * _Nonnull stop) {
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+
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+ flag = (([obj.conditionIndexs[obj1.section] integerValue] == obj1.row) || (obj1.section == property.indexPath.section)) && flag;
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+ }];
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+
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+ if (flag) {
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+ [set addObject:property.indexPath];
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+ }
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+
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+ }else {
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+ [set addObject:property.indexPath];
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+ }
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+ }];
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+ }
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+ }];
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+
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+ //合并本行数据
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+ [_allAvailableIndexPaths enumerateObjectsUsingBlock:^(NSIndexPath * _Nonnull obj, BOOL * _Nonnull stop) {
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+ if (obj.section == selectedIndexPath.section) {
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+ [set addObject:obj];
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+ }
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+ }];
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+
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+ return set;
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+}
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+
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+//当前可用的
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+- (void)updateAvailableIndexPaths {
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+
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+ if (_selectedIndexPaths.count == 0) {
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+
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+ _availableIndexPathsSet = [_allAvailableIndexPaths mutableCopy];
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+ return ;
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+ }
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+
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+ __block NSMutableSet *set = [NSMutableSet set];
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+
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+ NSMutableArray *seleted = [NSMutableArray array];
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+
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+ [_selectedIndexPaths enumerateObjectsUsingBlock:^(NSIndexPath * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
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+
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+ [seleted addObject:obj];
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+
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+ NSMutableSet *tempSet = nil;
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+
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+ tempSet = [self availableIndexPathsFromSelctedIndexPath:obj sectedIndexPaths:seleted];
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+
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+ if (set.count == 0) {
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+ set = [tempSet mutableCopy];
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+ }else {
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+ [set intersectSet:tempSet];
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+ }
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+
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+ }];
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+
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+ _availableIndexPathsSet = set;
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+
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+
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+}
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+
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+// 当前结果
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+- (void)updateCurrentResult {
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+
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+ if (_selectedIndexPaths.count != [_dataSource numberOfSectionsForPropertiesInFilter:self]) {
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+ _currentResult = nil;
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+ return;
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+ }
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+ NSMutableArray *conditions = [NSMutableArray array];
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+
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+ for (int i = 0; i < [_dataSource numberOfSectionsForPropertiesInFilter:self]; i ++) {
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+ [_selectedIndexPaths enumerateObjectsUsingBlock:^(NSIndexPath * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
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+ if (obj.section == i) {
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+ [conditions addObject:@(obj.row)];
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+ }
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+ }];
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+
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+ }
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+ _currentResult = [self skuResultWithConditionIndexs:[conditions copy]];
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+}
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+
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+- (BOOL)isAvailableWithPropertyIndexPath:(NSIndexPath *)indexPath {
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+
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+ __block BOOL isAvailable = NO;
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+
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+ [_conditions enumerateObjectsUsingBlock:^(ORSKUCondition * _Nonnull obj, BOOL * _Nonnull stop) {
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+ if ([obj.conditionIndexs objectAtIndex:indexPath.section].integerValue == indexPath.row) {
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+ isAvailable = YES;
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+ *stop = YES;
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+ }
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+ }];;
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+
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+ return isAvailable;
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+}
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+
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+
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+#pragma mark -- setter
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+- (void)setDataSource:(id<ORSKUDataFilterDataSource>)dataSource {
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+ _dataSource = dataSource;
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+ [self reloadData];
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+}
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+
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+- (void)setNeedDefaultValue:(BOOL)needDefaultValue {
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+
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+ _needDefaultValue = needDefaultValue;
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+
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+ if (_selectedIndexPaths.count > 0 || !needDefaultValue) {
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+ return;
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+ }
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+
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+ [self reloadData];
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+}
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+
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+@end
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+
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+@implementation ORSKUCondition
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+
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+- (void)setProperties:(NSArray<ORSKUProperty *> *)properties {
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+
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+ _properties = properties;
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+ NSMutableArray *array = [NSMutableArray array];
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+ [properties enumerateObjectsUsingBlock:^(ORSKUProperty * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
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+ [array addObject:@(obj.indexPath.item)];
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+ }];
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+ _conditionIndexs = [array copy];
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+}
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+
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+@end
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+
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+@implementation ORSKUProperty
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+
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+- (instancetype)initWithValue:(id)value indexPath:(NSIndexPath *)indexPath
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+{
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+ self = [super init];
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+ if (self) {
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+ _value = value;
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+ _indexPath = indexPath;
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+ }
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+ return self;
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+}
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+
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+@end
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+
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+
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+
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南鑫林