JSJP_Student/jiaPei/Modules/OtherModules/ExerciseModule/ViewModel/ExercisePage/itemViewModel/RQExercisExplainItemViewModel.m

//
//  RQExercisExplainItemViewModel.m
//  JSJP
//
//  Created by 张嵘 on 2022/7/3.
//

#import "RQExercisExplainItemViewModel.h"

@interface RQExercisExplainItemViewModel ()
@property (nonatomic, readwrite, strong) RQExerciseModel *exerciseModel;
@property (nonatomic, readwrite, strong) YYLabel *yyLabel;
@property (nonatomic, readwrite, strong) NSMutableAttributedString *explainString;


@end

@implementation RQExercisExplainItemViewModel
- (instancetype)initWithRQExerciseModel:(RQExerciseModel *)exerciseModel {
    if (self = [super init]) {
        @weakify(self)
        dispatch_async(dispatch_get_main_queue(), ^{
            @strongify(self)
            
            self.exerciseModel = exerciseModel;
            CGFloat headerHeight = 16.f + 26.f + 16.f;
            CGFloat textHeight = 0;
            CGFloat footerHeight = 16.f + 18.f + 16.f;
            if (!RQObjectIsNil(exerciseModel.ydtQuestionModel)) {
                if (RQStringIsNotEmpty(exerciseModel.ydtQuestionModel.explain)) {
                    NSMutableAttributedString *text = [[NSMutableAttributedString alloc] initWithString:exerciseModel.ydtQuestionModel.explain];
                    text.yy_font = [UIFont systemFontOfSize:RQ_Exercise_Module.exerciseFontSize];
                    text.yy_lineSpacing = 8;
                    text.yy_color = RQ_MAIN_TEXT_COLOR_1;
                    self.explainString = text;
                    CGFloat height = [self getMessageHeightWithAttributedStr:text andLabel:self.yyLabel];
                    textHeight = height;
                }
            }
            
            self.rowHeight = headerHeight + textHeight + footerHeight;
        });
        
        
        
    }
    return self;
}


- (CGFloat)getMessageHeightWithAttributedStr:(NSMutableAttributedString *)attributedStr andLabel:(YYLabel *)lb {
    lb.attributedText = attributedStr;
    CGSize introSize = CGSizeMake(RQ_SCREEN_WIDTH - (16 * 2) - (8 * 2), CGFLOAT_MAX);
    YYTextLayout *layout = [YYTextLayout layoutWithContainerSize:introSize text:attributedStr];
    lb.textLayout = layout;
    CGFloat introHeight = layout.textBoundingSize.height;
    return introHeight;
}

- (YYLabel *)yyLabel {
    if (!_yyLabel) {
        _yyLabel = [[YYLabel alloc] init];
    }
    return _yyLabel;
}

- (NSString *)itemClassName {
    return @"RQExercisExplainCell";
}
@end