session-ios/Signal/src/ViewControllers/ConversationView/Cells/OWSAudioMessageView.m

//
//  Copyright (c) 2019 Open Whisper Systems. All rights reserved.
//

#import "OWSAudioMessageView.h"
#import "ConversationViewItem.h"
#import "Session-Swift.h"
#import "UIColor+OWS.h"
#import "ViewControllerUtils.h"
#import <SignalMessaging/OWSFormat.h>
#import <SignalMessaging/UIColor+OWS.h>
#import <SessionServiceKit/MIMETypeUtil.h>

NS_ASSUME_NONNULL_BEGIN

@interface OWSAudioMessageView ()

@property (nonatomic) TSAttachment *attachment;
@property (nonatomic, nullable) TSAttachmentStream *attachmentStream;
@property (nonatomic) BOOL isIncoming;
@property (nonatomic, weak) id<ConversationViewItem> viewItem;
@property (nonatomic, readonly) ConversationStyle *conversationStyle;

@property (nonatomic, nullable) UIButton *audioPlayPauseButton;
@property (nonatomic, nullable) UILabel *audioBottomLabel;
@property (nonatomic, nullable) AudioProgressView *audioProgressView;

@end

#pragma mark -

@implementation OWSAudioMessageView

- (instancetype)initWithAttachment:(TSAttachment *)attachment
                        isIncoming:(BOOL)isIncoming
                          viewItem:(id<ConversationViewItem>)viewItem
                 conversationStyle:(ConversationStyle *)conversationStyle
{
    self = [super init];

    if (self) {
        _attachment = attachment;
        if ([attachment isKindOfClass:[TSAttachmentStream class]]) {
            _attachmentStream = (TSAttachmentStream *)attachment;
        }
        _isIncoming = isIncoming;
        _viewItem = viewItem;
        _conversationStyle = conversationStyle;
    }

    return self;
}

- (void)updateContents
{
    [self updateAudioProgressView];
    [self updateAudioBottomLabel];

    if (self.audioPlaybackState == AudioPlaybackState_Playing) {
        [self setAudioIconToPause];
    } else {
        [self setAudioIconToPlay];
    }
}

- (CGFloat)audioProgressSeconds
{
    return [self.viewItem audioProgressSeconds];
}

- (CGFloat)audioDurationSeconds
{
    return self.viewItem.audioDurationSeconds;
}

- (AudioPlaybackState)audioPlaybackState
{
    return [self.viewItem audioPlaybackState];
}

- (BOOL)isAudioPlaying
{
    return self.audioPlaybackState == AudioPlaybackState_Playing;
}

- (void)updateAudioBottomLabel
{
    if (self.isAudioPlaying && self.audioProgressSeconds > 0 && self.audioDurationSeconds > 0) {
        self.audioBottomLabel.text =
            [NSString stringWithFormat:@"%@ / %@",
                      [OWSFormat formatDurationSeconds:(long)round(self.audioProgressSeconds)],
                      [OWSFormat formatDurationSeconds:(long)round(self.audioDurationSeconds)]];
    } else {
        self.audioBottomLabel.text =
            [NSString stringWithFormat:@"%@", [OWSFormat formatDurationSeconds:(long)round(self.audioDurationSeconds)]];
    }
}

- (void)setAudioIcon:(UIImage *)icon
{
    icon = [icon resizedImageToSize:CGSizeMake(self.iconSize, self.iconSize)];
    [_audioPlayPauseButton setImage:icon forState:UIControlStateNormal];
    [_audioPlayPauseButton setImage:icon forState:UIControlStateDisabled];
}

- (void)setAudioIconToPlay
{
    [self setAudioIcon:[UIImage imageNamed:@"CirclePlay"]];
}

- (void)setAudioIconToPause
{
    [self setAudioIcon:[UIImage imageNamed:@"CirclePause"]];
}

- (void)updateAudioProgressView
{
    [self.audioProgressView
        setProgress:(self.audioDurationSeconds > 0 ? self.audioProgressSeconds / self.audioDurationSeconds : 0.f)];

    UIColor *progressColor = [self.conversationStyle bubbleSecondaryTextColorWithIsIncoming:self.isIncoming];
    self.audioProgressView.horizontalBarColor = progressColor;
    self.audioProgressView.progressColor = progressColor;
}

- (void)replaceIconWithDownloadProgressIfNecessary:(UIView *)iconView
{
    if (!self.viewItem.attachmentPointer) {
        return;
    }

    switch (self.viewItem.attachmentPointer.state) {
        case TSAttachmentPointerStateFailed:
            // We don't need to handle the "tap to retry" state here,
            // only download progress.
            return;
        case TSAttachmentPointerStateEnqueued:
        case TSAttachmentPointerStateDownloading:
            break;
    }
    switch (self.viewItem.attachmentPointer.pointerType) {
        case TSAttachmentPointerTypeRestoring:
            // TODO: Show "restoring" indicator and possibly progress.
            return;
        case TSAttachmentPointerTypeUnknown:
        case TSAttachmentPointerTypeIncoming:
            break;
    }
    NSString *_Nullable uniqueId = self.viewItem.attachmentPointer.uniqueId;
    if (uniqueId.length < 1) {
        OWSFailDebug(@"Missing uniqueId.");
        return;
    }

    CGFloat downloadViewSize = self.iconSize;
    MediaDownloadView *downloadView =
        [[MediaDownloadView alloc] initWithAttachmentId:uniqueId radius:downloadViewSize * 0.5f];
    iconView.layer.opacity = 0.01f;
    [self addSubview:downloadView];
    [downloadView autoSetDimensionsToSize:CGSizeMake(downloadViewSize, downloadViewSize)];
    [downloadView autoAlignAxis:ALAxisHorizontal toSameAxisOfView:iconView];
    [downloadView autoAlignAxis:ALAxisVertical toSameAxisOfView:iconView];
}

#pragma mark -

- (CGFloat)hMargin
{
    return 0.f;
}

- (CGFloat)hSpacing
{
    return 8.f;
}

+ (CGFloat)vMargin
{
    return 0.f;
}

- (CGFloat)vMargin
{
    return [OWSAudioMessageView vMargin];
}

+ (CGFloat)bubbleHeight
{
    CGFloat iconHeight = self.iconSize;
    CGFloat labelsHeight = ([OWSAudioMessageView labelFont].lineHeight * 2 +
        [OWSAudioMessageView audioProgressViewHeight] + [OWSAudioMessageView labelVSpacing] * 2);
    CGFloat contentHeight = MAX(iconHeight, labelsHeight);
    return contentHeight + self.vMargin * 2;
}

- (CGFloat)bubbleHeight
{
    return [OWSAudioMessageView bubbleHeight];
}

+ (CGFloat)iconSize
{
    return 72.f;
}

- (CGFloat)iconSize
{
    return [OWSAudioMessageView iconSize];
}

- (BOOL)isVoiceMessage
{
    return self.attachment.isVoiceMessage;
}

- (void)createContents
{
    self.axis = UILayoutConstraintAxisHorizontal;
    self.alignment = UIStackViewAlignmentCenter;
    self.spacing = self.hSpacing;
    self.layoutMarginsRelativeArrangement = YES;
    self.layoutMargins = UIEdgeInsetsMake(self.vMargin, 0, self.vMargin, 0);

    _audioPlayPauseButton = [UIButton buttonWithType:UIButtonTypeCustom];
    self.audioPlayPauseButton.enabled = NO;
    [self addArrangedSubview:self.audioPlayPauseButton];
    self.audioPlayPauseButton.imageView.contentMode = UIViewContentModeCenter;
    [self.audioPlayPauseButton autoSetDimension:ALDimensionWidth toSize:56.f];
    [self.audioPlayPauseButton autoSetDimension:ALDimensionHeight toSize:56.f];
    self.audioPlayPauseButton.imageView.clipsToBounds = NO;
    self.audioPlayPauseButton.clipsToBounds = NO;
    self.clipsToBounds = NO;

    [self replaceIconWithDownloadProgressIfNecessary:self.audioPlayPauseButton];

    NSString *_Nullable filename = self.attachment.sourceFilename;
    if (filename.length < 1) {
        filename = [self.attachmentStream.originalFilePath lastPathComponent];
    }
    NSString *topText = [[filename stringByDeletingPathExtension] ows_stripped];
    if (topText.length < 1) {
        topText = [MIMETypeUtil fileExtensionForMIMEType:self.attachment.contentType].localizedUppercaseString;
    }
    if (topText.length < 1) {
        topText = NSLocalizedString(@"GENERIC_ATTACHMENT_LABEL", @"A label for generic attachments.");
    }
    if (self.isVoiceMessage) {
        topText = nil;
    }
    UILabel *topLabel = [UILabel new];
    topLabel.text = topText;
    topLabel.textColor = [self.conversationStyle bubbleTextColorWithIsIncoming:self.isIncoming];
    topLabel.lineBreakMode = NSLineBreakByTruncatingMiddle;
    topLabel.font = [OWSAudioMessageView labelFont];

    AudioProgressView *audioProgressView = [AudioProgressView new];
    self.audioProgressView = audioProgressView;
    [self updateAudioProgressView];
    [audioProgressView autoSetDimension:ALDimensionHeight toSize:[OWSAudioMessageView audioProgressViewHeight]];

    UILabel *bottomLabel = [UILabel new];
    self.audioBottomLabel = bottomLabel;
    [self updateAudioBottomLabel];
    bottomLabel.textColor = [self.conversationStyle bubbleSecondaryTextColorWithIsIncoming:self.isIncoming];
    bottomLabel.lineBreakMode = NSLineBreakByTruncatingMiddle;
    bottomLabel.font = [OWSAudioMessageView labelFont];

    UIStackView *labelsView = [UIStackView new];
    labelsView.axis = UILayoutConstraintAxisVertical;
    labelsView.spacing = [OWSAudioMessageView labelVSpacing];
    [labelsView addArrangedSubview:topLabel];
    [labelsView addArrangedSubview:audioProgressView];
    [labelsView addArrangedSubview:bottomLabel];

    // Ensure the "audio progress" and "play button" are v-center-aligned using a container.
    UIView *labelsContainerView = [UIView containerView];
    [self addArrangedSubview:labelsContainerView];
    [labelsContainerView addSubview:labelsView];
    [labelsView autoPinWidthToSuperview];
    [labelsView autoPinEdgeToSuperviewMargin:ALEdgeTop relation:NSLayoutRelationGreaterThanOrEqual];
    [labelsView autoPinEdgeToSuperviewMargin:ALEdgeBottom relation:NSLayoutRelationGreaterThanOrEqual];

    [audioProgressView autoAlignAxis:ALAxisHorizontal toSameAxisOfView:self.audioPlayPauseButton];

    [self updateContents];
}

+ (CGFloat)audioProgressViewHeight
{
    return 12.f;
}

+ (UIFont *)labelFont
{
    return [UIFont ows_dynamicTypeCaption2Font];
}

+ (CGFloat)labelVSpacing
{
    return 2.f;
}

@end

NS_ASSUME_NONNULL_END