商品选择SKUDataFilter

* github:https://github.com/SunriseOYR/SKUDataFilter

* bigo:https://www.jianshu.com/p/295737e2ac77

#import

@class ORSKUDataFilter;

@class ORSKUProperty;

@protocolORSKUDataFilterDataSource

@required

//属性种类个数

- (NSInteger)numberOfSectionsForPropertiesInFilter:(ORSKUDataFilter*)filter;

* 每个种类所有的的属性值

* 这里不关心具体的值，可以是属性ID, 属性名，字典、model

- (NSArray*)filter:(ORSKUDataFilter*)filter propertiesInSection:(NSInteger)section;

//满足条件的个数

- (NSInteger)numberOfConditionsInFilter:(ORSKUDataFilter*)filter;

* 对应的条件式

* 这里条件式的属性值，需要和propertiesInSection里面的数据类型保持一致

- (NSArray*)filter:(ORSKUDataFilter*)filter conditionForRow:(NSInteger)row;

//条件式对应的结果数据（库存、价格等）

- (id)filter:(ORSKUDataFilter*)filter resultOfConditionForRow:(NSInteger)row;

@end

@interfaceORSKUDataFilter :NSObject

@property (nonatomic, assign) id<ORSKUDataFilterDataSource> dataSource;

//当前选中的属性indexPath

@property(nonatomic,strong,readonly)NSArray *selectedIndexPaths;

//当前可选的属性indexPath

@property(nonatomic,strong,readonly)NSSet *availableIndexPathsSet;

//当前结果

@property (nonatomic, strong, readonly) id currentResult;

//init

- (instancetype)initWithDataSource:(id)dataSource;

//选中属性的时候调用

- (void)didSelectedPropertyWithIndexPath:(NSIndexPath*)indexPath;

//重新加载数据

- (void)reloadData;

@end

@interfaceORSKUCondition :NSObject

@property (nonatomic, strong) NSArray<ORSKUProperty *> *properties;

@property (nonatomic, strong, readonly) NSArray<NSNumber *> *conditionIndexs;

@property (nonatomic, strong) id result;

@end

@interfaceORSKUProperty :NSObject

@property (nonatomic, copy, readonly) NSIndexPath * indexPath;

@property (nonatomic, copy, readonly) id value;

- (instancetype)initWithValue:(id)value indexPath:(NSIndexPath*)indexPath;

@end

#import "ORSKUDataFilter.h"

@interface ORSKUDataFilter()

@property (nonatomic, strong) NSSet <ORSKUCondition *> *conditions;

@property(nonatomic,strong)NSMutableArray *selectedIndexPaths;

@property(nonatomic,strong)NSMutableSet *availableIndexPathsSet;

//全可用的

@property(nonatomic,strong)NSSet *allAvailableIndexPaths;

@property (nonatomic, strong) id currentResult;

@end

@implementationORSKUDataFilter

- (instancetype)initWithDataSource:(id)dataSource

{

self= [superinit];

if(self) {

_dataSource= dataSource;

_selectedIndexPaths = [NSMutableArray array];

[self initPropertiesSkuListData];

}

return self;

}

- (instancetype)init

{

self= [superinit];

if(self) {

_selectedIndexPaths = [NSMutableArray array];

}

return self;

}

- (void)reloadData {

[_selectedIndexPaths removeAllObjects];

[self initPropertiesSkuListData];

[self updateCurrentResult];

}

#pragma mark -- public method

//选中某个属性

- (void)didSelectedPropertyWithIndexPath:(NSIndexPath*)indexPath {

if (![_availableIndexPathsSet containsObject:indexPath]) {

//不可选

return;

}

if(indexPath.section> [_dataSourcenumberOfSectionsForPropertiesInFilter:self] || indexPath.item>= [[_dataSourcefilter:selfpropertiesInSection:indexPath.section]count]) {

//越界

NSLog(@"indexPath is out of range");

return;

}

if([_selectedIndexPathscontainsObject:indexPath]) {

//已被选

[_selectedIndexPathsremoveObject:indexPath];

[self updateAvailableIndexPaths];

[self updateCurrentResult];

return;

}

__blockNSIndexPath*lastIndexPath =nil;

[_selectedIndexPathsenumerateObjectsUsingBlock:^(NSIndexPath*_Nonnullobj,NSUIntegeridx,BOOL*_Nonnullstop) {

if(indexPath.section== obj.section) {

lastIndexPath = obj;

}

}];

if(!lastIndexPath) {

//添加新属性

[_selectedIndexPathsaddObject:indexPath];

[_availableIndexPathsSet intersectSet:[self availableIndexPathsFromSelctedIndexPath:indexPath sectedIndexPaths:_selectedIndexPaths]];

[self updateCurrentResult];

return;

}

if(lastIndexPath.item!= indexPath.item) {

//切换属性

[_selectedIndexPathsaddObject:indexPath];

[_selectedIndexPathsremoveObject:lastIndexPath];

[self updateAvailableIndexPaths];

[self updateCurrentResult];

}

#pragma mark -- private method

//获取初始数据

- (void)initPropertiesSkuListData {

NSMutableSet *modelSet = [NSMutableSet set];

for(inti =0; i < [_dataSourcenumberOfConditionsInFilter:self]; i ++) {

ORSKUCondition *model = [ORSKUCondition new];

NSArray* conditions = [_dataSourcefilter:selfconditionForRow:i];

if(![selfcheckConformToSkuConditions:conditions]) {

NSLog(@"第 %d 个 condition 不完整 \n %@", i, conditions);

continue;

}

model.properties= [selfpropertiesWithConditionRawData:conditions];

model.result = [_dataSource filter:self resultOfConditionForRow:i];

[modelSetaddObject:model];

}

_conditions= [modelSetcopy];

[self getAllAvailableIndexPaths];

}

//检查数据是否正确

- (BOOL)checkConformToSkuConditions:(NSArray*)conditions {

if (conditions.count != [_dataSource numberOfSectionsForPropertiesInFilter:self]) {

returnNO;

}

__blockBOOL flag =YES;

[conditionsenumerateObjectsUsingBlock:^(id _Nonnullobj,NSUIntegeridx,BOOL*_Nonnullstop) {

NSArray*properties = [_dataSourcefilter:selfpropertiesInSection:idx];

if(![propertiescontainsObject:obj]) {

flag =NO;

*stop =YES;

}

}];

returnflag;

}

//获取属性

- (NSArray *)propertiesWithConditionRawData:(NSArray*)data {

NSMutableArray *array = [NSMutableArray array];

[dataenumerateObjectsUsingBlock:^(id _Nonnullobj,NSUIntegeridx,BOOL*_Nonnullstop) {

[arrayaddObject:[selfpropertyOfValue:objinSection:idx]];

}];

returnarray;

}

- (ORSKUProperty*)propertyOfValue:(id)value inSection:(NSInteger)section {

NSArray*properties = [_dataSourcefilter:selfpropertiesInSection:section];

NSString *str = [NSString stringWithFormat:@"Properties for %ld dosen‘t exist %@", (long)section, value];

NSAssert([properties containsObject:value], str);

NSIndexPath*indexPath = [NSIndexPathindexPathForItem:[propertiesindexOfObject:value]inSection:section];

return[[ORSKUPropertyalloc]initWithValue:valueindexPath:indexPath];

}

//获取条件式对应的数据

- (id)skuResultWithConditionIndexs:(NSArray *)conditionIndexs {

__blockidresult =nil;

[_conditionsenumerateObjectsUsingBlock:^(ORSKUCondition*_Nonnullobj,BOOL*_Nonnullstop) {

if([obj.conditionIndexsisEqual:conditionIndexs]) {

result = obj.result;

*stop =YES;

}

}];

returnresult;

}

//获取初始可选的所有IndexPath

- (NSMutableSet *)getAllAvailableIndexPaths {

NSMutableSet *set = [NSMutableSet set];

[_conditionsenumerateObjectsUsingBlock:^(ORSKUCondition*_Nonnullobj,BOOL*_Nonnullstop) {

[obj.conditionIndexsenumerateObjectsUsingBlock:^(NSNumber*_Nonnullobj1,NSUIntegeridx1,BOOL*_Nonnullstop1) {

[setaddObject:[NSIndexPathindexPathForItem:obj1.integerValueinSection:idx1]];

}];

_availableIndexPathsSet = set;

_allAvailableIndexPaths = [set copy];

returnset;

}

//选中某个属性时根据已选中的系列属性获取可选的IndexPath

- (NSMutableSet *)availableIndexPathsFromSelctedIndexPath:(NSIndexPath*)selectedIndexPath sectedIndexPaths:(NSArray *)indexPaths{

NSMutableSet *set = [NSMutableSet set];

[_conditionsenumerateObjectsUsingBlock:^(ORSKUCondition*_Nonnullobj,BOOL*_Nonnullstop) {

if([obj.conditionIndexsobjectAtIndex:selectedIndexPath.section].integerValue== selectedIndexPath.item) {

[obj.propertiesenumerateObjectsUsingBlock:^(ORSKUProperty*_Nonnullproperty,NSUIntegeridx2,BOOL*_Nonnullstop1) {

//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

//过滤方式为 condition要么包含已选中要么和已选中属性是同级

if(property.indexPath.section!= selectedIndexPath.section) {

__blockBOOLflag =YES;

[indexPathsenumerateObjectsUsingBlock:^(NSIndexPath*_Nonnullobj1,NSUIntegeridx,BOOL*_Nonnullstop) {

flag = (([obj.conditionIndexs[obj1.section]integerValue] == obj1.row) || (obj1.section== property.indexPath.section)) && flag;

}];

if(flag) {

[setaddObject:property.indexPath];

}

}else{

[setaddObject:property.indexPath];

}

}];

}

}];

//合并本行数据

[_allAvailableIndexPathsenumerateObjectsUsingBlock:^(NSIndexPath*_Nonnullobj,BOOL*_Nonnullstop) {

if(obj.section== selectedIndexPath.section) {

[setaddObject:obj];

}

}];

returnset;

}

//当前可用的

- (void)updateAvailableIndexPaths {

if (_selectedIndexPaths.count == 0) {

_availableIndexPathsSet = [_allAvailableIndexPaths mutableCopy];

return;

}

__block NSMutableSet *set = [NSMutableSet set];

NSMutableArray *seleted = [NSMutableArray array];

[_selectedIndexPathsenumerateObjectsUsingBlock:^(NSIndexPath*_Nonnullobj,NSUIntegeridx,BOOL*_Nonnullstop) {

[seletedaddObject:obj];

NSMutableSet*tempSet =nil;

tempSet = [self availableIndexPathsFromSelctedIndexPath:obj sectedIndexPaths:seleted];

if(set.count==0) {

set = [tempSetmutableCopy];

}else{

[setintersectSet:tempSet];

}

}];

_availableIndexPathsSet = set;

}

// 当前结果

- (void)updateCurrentResult {

if (_selectedIndexPaths.count != [_dataSource numberOfSectionsForPropertiesInFilter:self]) {

_currentResult = nil;

return;

}

NSMutableArray *conditions = [NSMutableArray array];

for (int i = 0; i < [_dataSource numberOfSectionsForPropertiesInFilter:self]; i ++) {

[_selectedIndexPathsenumerateObjectsUsingBlock:^(NSIndexPath*_Nonnullobj,NSUIntegeridx,BOOL*_Nonnullstop) {

if(obj.section== i) {

[conditionsaddObject:@(obj.row)];

}

}];

}

_currentResult = [self skuResultWithConditionIndexs:[conditions copy]];

}

- (BOOL)isAvailableWithPropertyIndexPath:(NSIndexPath*)indexPath {

__blockBOOLisAvailable =NO;

[_conditionsenumerateObjectsUsingBlock:^(ORSKUCondition*_Nonnullobj,BOOL*_Nonnullstop) {

if([obj.conditionIndexsobjectAtIndex:indexPath.section].integerValue== indexPath.row) {

isAvailable =YES;

*stop =YES;

}

}];;

returnisAvailable;

}

#pragma mark -- setter

- (void)setDataSource:(id)dataSource {

_dataSource= dataSource;

[self initPropertiesSkuListData];

}

@end

@implementation ORSKUCondition

- (void)setProperties:(NSArray *)properties {

_properties= properties;

NSMutableArray *array = [NSMutableArray array];

[propertiesenumerateObjectsUsingBlock:^(ORSKUProperty*_Nonnullobj,NSUIntegeridx,BOOL*_Nonnullstop) {

[arrayaddObject:@(obj.indexPath.item)];

}];

_conditionIndexs = [array copy];

}

@end

@implementation ORSKUProperty

- (instancetype)initWithValue:(id)value indexPath:(NSIndexPath*)indexPath

{

self= [superinit];

if(self) {

_value= value;

_indexPath= indexPath;

}

return self;

}

@end

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