mvm_core_ui/MVMCoreUI/Molecules/TopLabelsView.m

//
//  TopLabelsView.m
//  mobilefirst
//
//  Created by Scott Pfeil on 2/24/16.
//  Copyright © 2016 Verizon Wireless. All rights reserved.
//

#import "TopLabelsView.h"
#import "TopLabelsAndBottomButtonsTableViewController.h"
#import <MVMCoreUI/MFSizeObject.h>
#import <MVMCoreUI/MFFonts.h>
#import <MVMCore/MVMCoreDispatchUtility.h>
#import <MVMCoreUI/MFStyler.h>
#import <MVMCore/MVMCoreConstants.h>
#import <MVMCoreUI/NSLayoutConstraint+MFConvenience.h>

@interface TopLabelsView ()

@property (nullable, weak, nonatomic) NSLayoutConstraint *leftConstraintTitle;
@property (nullable, weak, nonatomic) NSLayoutConstraint *rightConstraintTitle;
@property (nullable, weak, nonatomic) NSLayoutConstraint *leftConstraintMessage;
@property (nullable, weak, nonatomic) NSLayoutConstraint *rightConstraintMessage;
@property (nullable, weak, nonatomic) NSLayoutConstraint *leftConstraintSeparator;
@property (nullable, weak, nonatomic) NSLayoutConstraint *rightConstraintSeparator;

@property (nullable, strong, nonatomic) NSLayoutConstraint *heightConstraint;

@end

@implementation TopLabelsView

- (nullable instancetype)initWithTableView:(nullable TopLabelsAndBottomButtonsTableViewController *)tableView {
    if (self = [super init]) {
        self.tableView = tableView;
    }
    return self;
}

- (void)updateView:(CGFloat)size {
    [super updateView:size];
    [MVMCoreDispatchUtility performBlockOnMainThread:^{
        [self.headlineLabel updateView:size];
        [self.messageLabel updateView:size];
        [self.separatorView setLeftAndRightPinConstant:[MFStyler defaultHorizontalPaddingForSize:size]];
    }];
}

- (void)setupView {
    [super setupView];
    
    self.translatesAutoresizingMaskIntoConstraints = NO;
    self.backgroundColor = [UIColor clearColor];
    self.clipsToBounds = YES;

    [self.headlineLabel removeFromSuperview];
    MFLabel *headlineLabel = [MFLabel commonLabelH2:YES];
    [self addSubview:headlineLabel];
    self.headlineLabel = headlineLabel;
    
    [self.messageLabel removeFromSuperview];
    MFLabel *messageLabel = [MFLabel commonLabelB2:YES];
    [self addSubview:messageLabel];
    self.messageLabel = messageLabel;
    
    [headlineLabel setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical];
    [messageLabel setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical];
    [self setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical];
    
    NSLayoutConstraint *topLabelConstraint = [NSLayoutConstraint constraintWithItem:headlineLabel attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeTop multiplier:1.0 constant:PaddingFive];
    topLabelConstraint.priority = 999;
    topLabelConstraint.active = YES;
    self.topLabelConstraint = topLabelConstraint;
    
    self.spaceBetweenLabels = [NSLayoutConstraint constraintWithItem:messageLabel attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:headlineLabel attribute:NSLayoutAttributeBottom multiplier:1.0 constant:PaddingTwo];
    self.spaceBetweenLabels.active = YES;
    
    NSLayoutConstraint *leftConstraint = [NSLayoutConstraint constraintWithItem:headlineLabel attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeLeft multiplier:1.0 constant:[MFStyler defaultHorizontalPaddingForApplicationWidth]];
    leftConstraint.active = YES;
    self.leftConstraintTitle = leftConstraint;
    
    NSLayoutConstraint *rightConstraint = [NSLayoutConstraint constraintWithItem:self attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:headlineLabel attribute:NSLayoutAttributeRight multiplier:1.0 constant:[MFStyler defaultHorizontalPaddingForApplicationWidth]];
    rightConstraint.priority = 900;
    rightConstraint.active = YES;
    self.rightConstraintTitle = rightConstraint;
    
    NSLayoutConstraint *leftConstraintMessage = [NSLayoutConstraint constraintWithItem:messageLabel attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeLeft multiplier:1.0 constant:[MFStyler defaultHorizontalPaddingForApplicationWidth]];
    leftConstraintMessage.active = YES;
    self.leftConstraintMessage = leftConstraintMessage;
    
    NSLayoutConstraint *rightConstraintMessage = [NSLayoutConstraint constraintWithItem:self attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:messageLabel attribute:NSLayoutAttributeRight multiplier:1.0 constant:[MFStyler defaultHorizontalPaddingForApplicationWidth]];
    rightConstraintMessage.priority = 900;
    rightConstraintMessage.active = YES;
    self.rightConstraintMessage = rightConstraintMessage;
    
    NSLayoutConstraint *bottomLabelConstraint = [self.bottomAnchor constraintEqualToAnchor:messageLabel.bottomAnchor constant:PaddingDefaultVerticalSpacing];
    bottomLabelConstraint.active = YES;
    self.bottomLabelConstraint = bottomLabelConstraint;
    
    NSLayoutConstraint *heightConstraint = [NSLayoutConstraint constraintWithItem:self attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.f constant:0];
    heightConstraint.priority = 950;
    self.heightConstraint = heightConstraint;
    
    [self.separatorView removeFromSuperview];
    SeparatorView *separatorView = [SeparatorView separatorAddToView:self position:SeparatorPositionBot withHorizontalPadding:[MFStyler defaultHorizontalPaddingForApplicationWidth]];
    separatorView.translatesAutoresizingMaskIntoConstraints = NO;
    [separatorView setAsHeavy];
    separatorView.hidden = YES;
    self.separatorView = separatorView;
    
}

- (void)showTopLabels {
    self.topLabelConstraint.active = YES;
    self.heightConstraint.active = NO;
    [self layoutIfNeeded];
    
    // Need to inform the tableview to unpdate the size of its header
    if (self.tableView) {
        [self.tableView showHeader];        
    }
}

- (void)hideTopLabels {
    self.topLabelConstraint.active = NO;
    self.heightConstraint.active = YES;
    [self layoutIfNeeded];
    
    // Need to inform the tableview to unpdate the size of its footer
    if (self.tableView) {
        [self.tableView hideHeader];
    }
}

- (void)hideBottomLabels {
    self.spaceBetweenLabels.constant = 0;
    [self setMessageString:nil];
    [self layoutIfNeeded];
    
    // Need to inform the tableview to unpdate the size of its footer
    if (self.tableView) {
        [self.tableView hideHeader];
    }
}

- (void)spaceLabels:(nullable NSString *)headlineString messageString:(nullable NSString *)messageString {
    if (headlineString.length > 0 && messageString.length > 0) {
        self.spaceBetweenLabels.constant = PaddingTwo;
        [self showTopLabels];
    } else if (headlineString.length > 0 || messageString.length > 0) {
        self.spaceBetweenLabels.constant = 0;
        [self showTopLabels];
    } else {
        [self hideTopLabels];
    }
}

- (void)setMessageString:(nullable NSString *)messageString {
    self.messageLabel.text = messageString;
}

- (void)setMessageAttributedString:(nullable NSAttributedString *)messageString {
    self.messageLabel.attributedText = messageString;
}

- (void)setHeadlineString:(nullable NSString *)headlineString messageString:(nullable NSString *)messageString {
    
    self.headlineLabel.text = headlineString;
    [self setMessageString:messageString];
    [self spaceLabels:headlineString messageString:messageString];
}

- (void)setHeadlineAttributedString:(nullable NSAttributedString *)headlineString messageAttributedString:(nullable NSAttributedString *)messageString {
    
    self.headlineLabel.attributedText = headlineString;
    [self setMessageAttributedString:messageString];
    [self spaceLabels:headlineString.string messageString:messageString.string];
}

#pragma mark - Common styles

- (void)setAsLargeHeadline {
    [MFStyler styleLabelHeadlineLarge:self.headlineLabel];
    [self layoutIfNeeded];
    if (self.tableView) {
        [self.tableView showHeader];
    }
}

- (void)styleMessageLabelBold {
    [self removeFromSuperview];
	[MFStyler styleLabelH3:self.messageLabel];
    [self layoutIfNeeded];
    if (self.tableView) {
        //[MFUtility sizeViewToFit:self];
        CGRect frame = self.frame;
        frame.size.height = CGRectGetHeight(self.frame);
        //self.tableView.tableView.tableHeaderView = [[UIView alloc]initWithFrame:frame];
        //[self.tableView.tableView.tableHeaderView addSubview:self];
        [NSLayoutConstraint constraintPinSubviewToSuperview:self];

    }
}

- (void)setLeftConstant:(CGFloat)leftConstant {
    self.leftConstraintTitle.constant = leftConstant;
    self.leftConstraintMessage.constant = leftConstant;
    self.leftConstraintSeparator.constant = leftConstant;
}

- (void)setRightConstant:(CGFloat)rightConstant {
    self.rightConstraintTitle.constant = rightConstant;
    self.rightConstraintMessage.constant = rightConstant;
    self.rightConstraintSeparator.constant = rightConstant;
}

@end