API for Chromaflow

ChromaflowAPI.h

//
//  ChromaflowAPI.h
//  Chromaflow
//
//  Created by Ryan Nair on 10/15/21.
//  Copyright © 2021 Ryan Nair. All rights reserved.

#import <UIKit/UIKit.h>

@interface ChromaFlowColorManager : NSObject

@property(nonatomic, strong, readwrite) UIColor *primaryColor;
@property(nonatomic, strong, readwrite) UIColor *secondaryColor;
@property(nonatomic, strong, readwrite) UIColor *backgroundColor;
@property(nonatomic, assign, readwrite) BOOL isPlayingMusic;

+ (instancetype)sharedInstance;

/*!
 * Updates the color properties using MRMediaRemoteGetNowPlayingInfo() and posts an NSNotification with the name "imageDidChangeColorflow"
 * 
 * @param sourceIdentifier caches the colors from the album artwork to be later stored in "/var/mobile/Library/ChromaFlow" if parameter is equal to @"com.apple.Music"
 */

- (void)updateColors:(NSString *)sourceIdentifier;

@end

ChromaflowAPI.x

//
//  ChromaflowAPI.x
//  Chromaflow
//
//  Created by Ryan Nair on 10/15/21.
//  Copyright © 2021 Ryan Nair. All rights reserved.

#import "ChromaflowAPI.h"

// Example Usage

%group ChromaFlow
%hook anyUIView
- (id)initWithFrame:(CGRect)frame { // add notification observer

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleColorFlowChange:) name:@"imageDidChangeColorflow" object:nil];

	  return %orig;
}

%new
- (void)handleColorFlowChange:(NSNotification *)notification {

    ChromaFlowColorManager *colorManager = [objc_getClass(“ChromaFlowColorManager”) sharedInstance]; 

    if (colorManager.isPlayingMusic) {
        // use or get Chromaflow's colors 
        UIColor *secondaryColor = colorManager.secondaryColor;
        [self setBackgroundColor:secondaryColor];
    }
    else {
       // revert changes you made using Chromaflow's colors
       [self setBackgroundColor:nil];
    }
}
%end

%hook anyUIViewController
-(void)loadView { // add notification observer
    %orig;

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleColorFlowChange:) name:@"imageDidChangeColorflow" object:nil];
}

%new
- (void)handleColorFlowChange:(NSNotification *)notification {
    ChromaFlowColorManager *colorManager = [objc_getClass(“ChromaFlowColorManager”) sharedInstance]; 

    if (colorManager.isPlayingMusic) {
        // use or get Chromaflow's colors 
        UIColor *secondaryColor = colorManager.secondaryColor;
        self.view.backgroundColor = secondaryColor;
    }
    else {
        // revert changes you made using Chromaflow's colors
        self.view.backgroundColor = nil;
    }
}

%end
%end

static __attribute__((constructor)) void Init() {
    // Check Chromaflow preferences to see if to use 

    Boolean keyExistsAndHasValidFormat;

    if (CFPreferencesGetAppBooleanValue(CFSTR("colorLockScreen"), CFSTR("com.ryannair05.chromaflow"), &keyExistsAndHasValidFormat) || !keyExistsAndHasValidFormat) {
        // Chromaflow coloring is actually enabled
        %init(ChromaFlow);
    }
}