Chat/ChatController/ChatKlassen/ChatMessage.cs

using System;
using System.ComponentModel;
using System.Text.RegularExpressions;
using System.Windows;
using System.Windows.Media;

namespace ChatController.ChatKlassen
{
    public class ChatMessage
    {
        //Chat-Ansicht 
        public ChatMessage(string username, string message, DateTime sendtime, bool isme, long pGroupId)
        {
            Username = username;
            UserMessage = message;
            SendTime = sendtime;
            IsMyMessage = isme;

            Farbgebung(isme);

            VisibilityRegelung(IsHyperlink(message) ? "HyperlinkMessage" : "Message");

            GroupId = pGroupId;
        }
        
        // Image-Ansicht  
        public ChatMessage(string username, string message, DateTime sendtime, bool isme, ImageSource image, string originalImage, string imageName, long pGroupId)
        {
            Username = username;
            UserMessage = message;
            SendTime = sendtime;
            ImageSources = image;
            IsMyMessage = isme;

            OriginalImage = originalImage;
            OriginalImageName = imageName;
         
            Farbgebung(isme);

            VisibilityRegelung("Image");
            
            GroupId = pGroupId;
        }

        //Dokumenten-Ansicht
        public ChatMessage(string pUsername, string pMessageText, DateTime pSendTime, string pSmallerImagePath, bool pIsLoggedInUsersMessage, string pUrl, long pGroupId)
        {
            Username = pUsername;
            UserMessage = pMessageText;
            SendTime = pSendTime;
            IsMyMessage = pIsLoggedInUsersMessage;

            FilePath = pUrl;

            Farbgebung(pIsLoggedInUsersMessage);

            Thumbnail = Utilities.Utils.CreateImageSourceFromPath(pSmallerImagePath);
            
            VisibilityRegelung("Dokumente");

            GroupId = pGroupId;
        }

        public ImageSource Thumbnail { get; }
        
        private void Farbgebung(bool isme)
        {
            if (isme)
            {
                ChatColor = new BrushConverter().ConvertFromString("#ff5e00") as SolidColorBrush;
                Posi = "Right";
            }
            else
            {
                ChatColor = new BrushConverter().ConvertFromString("#FFFFFF") as SolidColorBrush; //"#cccccc"
                Posi = "Left";
            }

            _farbeRechtsColor = new BrushConverter().ConvertFromString("#505050") as SolidColorBrush;
            _farbeLinksColor = new BrushConverter().ConvertFromString("#505050") as SolidColorBrush;
        }

        private void VisibilityRegelung(string Ansicht)
        {
            switch (Ansicht)
            {
                case "Message":
                        ChatVisibility = Visibility.Visible;

                        HyperlinkVisibility = Visibility.Collapsed;
                        _pictureVisibility = Visibility.Collapsed;
                        DokumentVisibility = Visibility.Collapsed;
                        _gifPictureVisibility = Visibility.Collapsed;
                        _picturePlaceHolderVisibility = Visibility.Collapsed;
                    break;
                case "HyperlinkMessage":
                        HyperlinkVisibility = Visibility.Visible;

                        ChatVisibility = Visibility.Collapsed;
                        _pictureVisibility = Visibility.Collapsed;
                        DokumentVisibility = Visibility.Collapsed;
                        _gifPictureVisibility = Visibility.Collapsed;
                        _picturePlaceHolderVisibility = Visibility.Collapsed;
                    break;
                case "Image":
                        _pictureVisibility = Visibility.Visible;

                        ChatVisibility = Visibility.Collapsed;
                        HyperlinkVisibility = Visibility.Collapsed;
                        DokumentVisibility = Visibility.Collapsed;
                        _picturePlaceHolderVisibility = Visibility.Collapsed;
                    break;
                case "Default_Image":
                        _picturePlaceHolderVisibility = Visibility.Visible;

                        _pictureVisibility = Visibility.Collapsed;
                        ChatVisibility = Visibility.Collapsed;
                        HyperlinkVisibility = Visibility.Collapsed;
                        DokumentVisibility = Visibility.Collapsed;                 
                    break;
                case "Dokumente":
                        DokumentVisibility = Visibility.Visible;

                        _pictureVisibility = Visibility.Collapsed;
                        ChatVisibility = Visibility.Collapsed;
                        HyperlinkVisibility = Visibility.Collapsed;
                        _picturePlaceHolderVisibility = Visibility.Collapsed;
                    break;
            }
        }

        private static readonly Regex UrlRegex = new Regex(@"(?#Protocol)(?:(?:ht|f)tp(?:s?)\:\/\/|~/|/)?(?#Username:Password)(?:\w+:\w+@)?(?#Subdomains)(?:(?:[-\w]+\.)+(?#TopLevel Domains)(?:com|org|net|gov|mil|biz|info|mobi|name|aero|jobs|museum|travel|[a-z]{2}))(?#Port)(?::[\d]{1,5})?(?#Directories)(?:(?:(?:/(?:[-\w~!$+|.,=]|%[a-f\d]{2})+)+|/)+|\?|#)?(?#Query)(?:(?:\?(?:[-\w~!$+|.,*:]|%[a-f\d{2}])+=(?:[-\w~!$+|.,*:=]|%[a-f\d]{2})*)(?:&(?:[-\w~!$+|.,*:]|%[a-f\d{2}])+=(?:[-\w~!$+|.,*:=]|%[a-f\d]{2})*)*)*(?#Anchor)(?:#(?:[-\w~!$+|.,*:=]|%[a-f\d]{2})*)?");

        public static bool IsHyperlink(string word)
        {
            try
            {
                if (word.IndexOfAny(@":.\/".ToCharArray()) != -1)
                {
                    if (Uri.IsWellFormedUriString(word, UriKind.Absolute))
                    {
                        return word.StartsWith("http://");
                    }
                    
                    if (UrlRegex.IsMatch(word))
                    {
                        var uri = new Uri(word, UriKind.RelativeOrAbsolute);

                        if (!uri.IsAbsoluteUri)
                        {
                            uri = new Uri(@"http://" + word, UriKind.Absolute);
                        }

                        if (uri.IsAbsoluteUri)
                        {
                            return true;
                        }
                    }
                    else
                    {
                        return false;
                    }
                }
            }
            catch (Exception e)
            {
                return false;
            }

            return false;
        }

        public bool IsMyMessage { get; set; }
        public string Username { get; }
        public string UserMessage { get; }
        public DateTime SendTime { get; }

        public string UserTimeStringLeft => IsMyMessage ? null : Username;

        public string UserTimeStringRight => SendTimeString;

        public string SendTimeString => SendTime.Date == DateTime.Today ? $"Heute {SendTime:HH:mm}" : SendTime.ToString("dd.MMM HH:mm");

        public Brush ChatColor { get; private set; }
        
        public string Posi { get; private set; }

        public string OriginalImage { get; }
        public string OriginalImageName { get; }
        
        public Visibility ChatVisibility { get; set; }
        public Visibility HyperlinkVisibility { get; set; }

        private Visibility _pictureVisibility;
        public Visibility PictureVisibility
        {
            get => _pictureVisibility;
            set
            {
                _pictureVisibility = value;
                OnPropertyChanged(nameof(PictureVisibility));
            }
        }

        private Visibility _picturePlaceHolderVisibility;
        public Visibility PicturePlaceHolderVisibility
        {
            get => _picturePlaceHolderVisibility;
            set
            {
                _picturePlaceHolderVisibility = value;
                OnPropertyChanged(nameof(PicturePlaceHolderVisibility));
            }
        }

        private Visibility _gifPictureVisibility;
        public Visibility GifPictureVisibility
        {
            get => _gifPictureVisibility;
            set
            {
                _gifPictureVisibility = value;
                OnPropertyChanged(nameof(GifPictureVisibility));
            }
        }

        public Visibility DokumentVisibility { get; set; }
        public ImageSource ImageSources { get; }
        public object FilePath { get; }  

        public long? ChatMessageOid { get; private set; }

        private Brush _farbeLinksColor;
        public Brush FarbeLinksColor
        {
            get => _farbeLinksColor;
            set
            {

                _farbeLinksColor = value;
                OnPropertyChanged(nameof(FarbeLinksColor));
            }
        }

        private Brush _farbeRechtsColor;
        public Brush FarbeRechtsColor
        {
            get => _farbeRechtsColor;
            set
            {

                _farbeRechtsColor = value;
                OnPropertyChanged(nameof(FarbeRechtsColor));
            }
        }

        public long GroupId { get; }

        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged(string propertyName)
        {
            var handler = PropertyChanged;
            handler?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}