1v1_7/MSYOUPAI/Class/BaiBao/VW/three/YOUPAIBBNIMSessionLayoutImpl.m

//
//  YOUPAIBBNIMSessionLayoutImpl.m
//  VQU
//
//  Created by Elaine on 2021/10/26.
//  Copyright © 2021 MS. All rights reserved.
//

#import "YOUPAIBBNIMSessionLayoutImpl.h"
#import "UITableView+NIMScrollToBottom.h"
#import "NIMMessageCell.h"
#import "NIMGlobalMacro.h"
#import "NIMSessionTableAdapter.h"
#import "UIView+NIM.h"
#import "NIMKitKeyboardInfo.h"

@interface YOUPAIBBNIMSessionLayoutImpl()
{
    NSMutableArray *_youpaipinserts;
    CGFloat _youpaipinputViewHeight;
}

@property (nonatomic,strong)  UIRefreshControl *refreshControl;

@property (nonatomic,strong)  NIMSession  *session;

@property (nonatomic,strong)  id<NIMSessionConfig> sessionConfig;

@property (nonatomic,weak)    id<NIMSessionLayoutDelegate> delegate;

@end

@implementation YOUPAIBBNIMSessionLayoutImpl

- (instancetype)initWithSession:(NIMSession *)session
                         config:(id<NIMSessionConfig>)sessionConfig
{
    self = [super init];
    if (self) {
        _sessionConfig = sessionConfig;
        _session       = session;
        _youpaipinserts       = [[NSMutableArray alloc] init];
        
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(youpaifmenuDidHide:) name:UIMenuControllerDidHideMenuNotification object:nil];
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(youpaifkeyboardWillChangeFrame:) name:NIMKitKeyboardWillChangeFrameNotification object:nil];
    }
    return self;
}

- (void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)reloadTable
{
    [self.youpaiptableView reloadData];
}
-(void)setYoupaiptableView:(UITableView *)youpaiptableView
{
    BOOL change = _youpaiptableView != youpaiptableView;
    if (change)
    {
        _youpaiptableView = youpaiptableView;
        [self youpaifsetupRefreshControl];
    }
}
- (void)resetLayout
{
    [self youpaifadjustInputView];
    [self youpaifadjustTableView];
}

- (void)layoutAfterRefresh
{
    [self.refreshControl endRefreshing];
    [self.youpaiptableView reloadData];
}

- (void)adjustOffset:(NSInteger)row {
    if (row >= 0) {
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            NSIndexPath *indexPath = [NSIndexPath indexPathForRow:row inSection:0];
            [self.youpaiptableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:YES];
        });
    }
}


- (void)changeLayout:(CGFloat)youpaipinputViewHeight
{
    BOOL change = _youpaipinputViewHeight != youpaipinputViewHeight;
    if (change)
    {
        _youpaipinputViewHeight = youpaipinputViewHeight;
        [self youpaifadjustInputView];
        [self youpaifadjustTableView];
    }
}


- (void)youpaifadjustInputView
{
    UIView *superView = self.youpaipinputView.superview;
    UIEdgeInsets safeAreaInsets = UIEdgeInsetsZero;
    if (@available(iOS 11.0, *))
    {
        safeAreaInsets = superView.safeAreaInsets;
    }
    self.youpaipinputView.nim_bottom = superView.nim_height - safeAreaInsets.bottom;
}

- (void)youpaifadjustTableView
{
    //输入框是否弹起
    BOOL youpaipinputViewUp = NO;
    switch (self.youpaipinputView.youpaipstatus)
    {
        case BBNIMInputStatusText:
            youpaipinputViewUp = [NIMKitKeyboardInfo instance].isVisiable;
            break;
        case BBNIMInputStatusAudio:
            youpaipinputViewUp = NO;
            break;
        case BBNIMInputStatusMore:
        case BBNIMInputStatusEmoticon:
            youpaipinputViewUp = YES;
        default:
            break;
    }
    self.youpaiptableView.userInteractionEnabled = !youpaipinputViewUp;
    CGRect rect = self.youpaiptableView.frame;
    
    //tableview 的位置
    UIView *superView = self.youpaiptableView.superview;
    UIEdgeInsets safeAreaInsets = UIEdgeInsetsZero;
    if (@available(iOS 11.0, *))
    {
        safeAreaInsets = superView.safeAreaInsets;
    }
    
    CGFloat containerSafeHeight = self.youpaiptableView.superview.frame.size.height - safeAreaInsets.bottom;
    
    rect.size.height = containerSafeHeight - self.youpaipinputView.youpaiptoolBar.nim_height;
    
    
    //tableview 的内容 inset
    UIEdgeInsets contentInsets = UIEdgeInsetsZero;
    CGFloat visiableHeight = 0;
    if (@available(iOS 11.0, *))
    {
        contentInsets = self.youpaiptableView.adjustedContentInset;
    }
    else
    {
        contentInsets = self.youpaiptableView.contentInset;
    }
    [self.youpaiptableView reloadData];
    
    //如果气泡过少，少于总高度，输入框视图需要顶到最后一个气泡的下面。
    visiableHeight = visiableHeight + self.youpaiptableView.contentSize.height + contentInsets.top + contentInsets.bottom;
    visiableHeight = MIN(visiableHeight, rect.size.height);
    
    rect.origin.y    = containerSafeHeight - visiableHeight - self.youpaipinputView.nim_height;
    rect.origin.y    = rect.origin.y > 0? 0 : rect.origin.y;
    
    
    BOOL tableChanged = !CGRectEqualToRect(self.youpaiptableView.frame, rect);
    if (tableChanged)
    {
        [self.youpaiptableView setFrame:rect];
        [self.youpaiptableView nim_scrollToBottom:YES];
    }
}

#pragma mark - Notification
- (void)youpaifmenuDidHide:(NSNotification *)notification
{
    [UIMenuController sharedMenuController].menuItems = nil;
}


- (void)youpaifkeyboardWillChangeFrame:(NSNotification *)notification
{
    if (!self.youpaiptableView.window)
    {
        //如果当前视图不是顶部视图，则不需要监听
        return;
    }
    [self.youpaipinputView sizeToFit];
}




#pragma mark - Private

- (void)calculateContent:(NIMMessageModel *)model{
    [model contentSize:self.youpaiptableView.nim_width];
}

- (void)youpaifsetupRefreshControl
{
    self.refreshControl = [[UIRefreshControl alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];

    if (@available(iOS 10.0, *))
    {
        self.youpaiptableView.refreshControl = self.refreshControl;
    }
    else
    {
        [self.youpaiptableView addSubview: self.refreshControl];
    }
    
    [self.refreshControl addTarget:self action:@selector(youpaifheaderRereshing:) forControlEvents:UIControlEventValueChanged];
    
}

- (void)youpaifheaderRereshing:(id)sender
{
    if ([self.delegate respondsToSelector:@selector(onRefresh)])
    {
        [self.delegate onRefresh];
    }
}

- (void)insert:(NSArray<NSIndexPath *> *)indexPaths animated:(BOOL)animated
{
    if (!indexPaths.count)
    {
        return;
    }

    NSMutableArray *addIndexPathes = [NSMutableArray array];
    [indexPaths enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
        NSIndexPath *indexPath = [NSIndexPath indexPathForRow:[obj integerValue] inSection:0];
        [addIndexPathes addObject:indexPath];
    }];
    
    [self.youpaiptableView beginUpdates];
    [self.youpaiptableView insertRowsAtIndexPaths:addIndexPathes withRowAnimation:UITableViewRowAnimationBottom];
    [self.youpaiptableView endUpdates];
    
    [UIView animateWithDuration:0.25 delay:0 options:7 animations:^{
        [self resetLayout];
    } completion:nil];
    
    [self.youpaiptableView nim_scrollToBottom:YES];
}

- (void)remove:(NSArray<NSIndexPath *> *)indexPaths
{
    [self.youpaiptableView beginUpdates];
    [self.youpaiptableView deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationNone];
    [self.youpaiptableView endUpdates];
    NSInteger row = [self.youpaiptableView numberOfRowsInSection:0] - 1;
    if (row > 0)
    {
        NSIndexPath *indexPath = [NSIndexPath indexPathForRow:row inSection:0];
        [self.youpaiptableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];
    }
}


- (void)update:(NSIndexPath *)indexPath
{
    NIMMessageCell *cell = (NIMMessageCell *)[self.youpaiptableView cellForRowAtIndexPath:indexPath];
    if (cell) {
        [self.youpaiptableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationNone];
        CGFloat scrollOffsetY = self.youpaiptableView.contentOffset.y;
        [self.youpaiptableView setContentOffset:CGPointMake(self.youpaiptableView.contentOffset.x, scrollOffsetY) animated:NO];
    }
}

- (BOOL)canInsertChatroomMessages
{
    return !self.youpaiptableView.isDecelerating && !self.youpaiptableView.isDragging;
}

@end