CanReadViewModel.cs

using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using NeuroAccessMaui.Resources.Languages;
using NeuroAccessMaui.Services;
using NeuroAccessMaui.Services.Contacts;
using NeuroAccessMaui.Services.Notification;
using NeuroAccessMaui.Services.Notification.Things;
using NeuroAccessMaui.UI.Pages.Things.IsFriend;
using NeuroAccessMaui.UI.Pages.Things.ViewClaimThing;
using System.Collections.ObjectModel;
using System.ComponentModel;
using Waher.Networking.XMPP;
using Waher.Networking.XMPP.Contracts;
using Waher.Networking.XMPP.Events;
using Waher.Networking.XMPP.Provisioning;
using Waher.Persistence;
using Waher.Script.Functions.ComplexNumbers;
using Waher.Things;
using Waher.Things.SensorData;
 
namespace NeuroAccessMaui.UI.Pages.Things.CanRead
{
    public partial class CanReadViewModel : XmppViewModel
    {
        private readonly NotificationEvent? @event;
        private readonly CanReadNavigationArgs? navigationArguments;
 
        public CanReadViewModel(CanReadNavigationArgs? Args)
            : base()
        {
            this.navigationArguments = Args;
                
            this.Tags = [];
            this.CallerTags = [];
            this.Fields = [];
            this.RuleRanges = [];
 
            if (Args is not null)
            {
                this.@event = Args.Event;
                this.BareJid = Args.BareJid;
                this.FriendlyName = Args.FriendlyName;
                this.RemoteJid = Args.RemoteJid;
                this.RemoteFriendlyName = Args.RemoteFriendlyName;
                this.Key = Args.Key;
                this.ProvisioningService = Args.ProvisioningService;
                this.FieldTypes = Args.FieldTypes;
                this.NodeId = Args.NodeId;
                this.SourceId = Args.SourceId;
                this.PartitionId = Args.PartitionId;
 
                this.PermitMomentary = Args.FieldTypes.HasFlag(FieldType.Momentary);
                this.PermitIdentity = Args.FieldTypes.HasFlag(FieldType.Identity);
                this.PermitStatus = Args.FieldTypes.HasFlag(FieldType.Status);
                this.PermitComputed = Args.FieldTypes.HasFlag(FieldType.Computed);
                this.PermitPeak = Args.FieldTypes.HasFlag(FieldType.Peak);
                this.PermitHistorical = Args.FieldTypes.HasFlag(FieldType.Historical);
 
                if (this.FriendlyName == this.BareJid)
                    this.FriendlyName = ServiceRef.Localizer[nameof(AppResources.NotAvailable)];
 
                this.RemoteFriendlyNameAvailable = this.RemoteFriendlyName != this.RemoteJid;
                if (!this.RemoteFriendlyNameAvailable)
                    this.RemoteFriendlyName = ServiceRef.Localizer[nameof(AppResources.NotAvailable)];
            }
        }
 
        public override async Task OnInitializeAsync()
        {
            await base.OnInitializeAsync();
 
            if (this.navigationArguments is not null)
            {
                this.Tags.Clear();
                this.CallerTags.Clear();
 
                ContactInfo Thing = await ContactInfo.FindByBareJid(this.BareJid ?? string.Empty);
                if (Thing?.MetaData is not null)
                {
                    foreach (Property Tag in Thing.MetaData)
                        this.Tags.Add(new HumanReadableTag(Tag));
                }
 
                ContactInfo Caller = await ContactInfo.FindByBareJid(this.RemoteJid ?? string.Empty);
                this.CallerInContactsList = Caller is not null;
                if (Caller?.MetaData is not null)
                {
                    foreach (Property Tag in Caller.MetaData)
                        this.CallerTags.Add(new HumanReadableTag(Tag));
                }
 
                if (this.navigationArguments.UserTokens is not null && this.navigationArguments.UserTokens.Length > 0)
                {
                    foreach (ProvisioningToken Token in this.navigationArguments.UserTokens)
                        this.CallerTags.Add(new HumanReadableTag(new Property(ServiceRef.Localizer[nameof(AppResources.User)], Token.FriendlyName ?? Token.Token)));
 
                    this.HasUser = true;
                }
 
                if (this.navigationArguments.ServiceTokens is not null && this.navigationArguments.ServiceTokens.Length > 0)
                {
                    foreach (ProvisioningToken Token in this.navigationArguments.ServiceTokens)
                        this.CallerTags.Add(new HumanReadableTag(new Property(ServiceRef.Localizer[nameof(AppResources.Service)], Token.FriendlyName ?? Token.Token)));
 
                    this.HasService = true;
                }
 
                if (this.navigationArguments.DeviceTokens is not null && this.navigationArguments.DeviceTokens.Length > 0)
                {
                    foreach (ProvisioningToken Token in this.navigationArguments.DeviceTokens)
                        this.CallerTags.Add(new HumanReadableTag(new Property(ServiceRef.Localizer[nameof(AppResources.Device)], Token.FriendlyName ?? Token.Token)));
 
                    this.HasDevice = true;
                }
 
                this.Fields.Clear();
 
                SortedDictionary<string, bool> PermittedFields = [];
                string[]? AllFields = this.navigationArguments.AllFields;
 
                if (AllFields is null && !string.IsNullOrEmpty(this.BareJid))
                {
                    AllFields = await CanReadNotificationEvent.GetAvailableFieldNames(this.BareJid, new ThingReference(this.NodeId, this.SourceId, this.PartitionId));
 
                    if (AllFields is not null && this.navigationArguments.Event is not null)
                    {
                        this.navigationArguments.Event.AllFields = AllFields;
                        await Database.Update(this.navigationArguments.Event);
                    }
                }
 
                bool AllFieldsPermitted = this.navigationArguments.Fields is null;
 
                if (AllFields is not null)
                {
                    foreach (string Field in AllFields)
                        PermittedFields[Field] = AllFieldsPermitted;
                }
 
                if (!AllFieldsPermitted && this.navigationArguments?.Fields is not null)
                {
                    foreach (string Field in this.navigationArguments.Fields)
                        PermittedFields[Field] = true;
                }
 
                foreach (KeyValuePair<string, bool> P in PermittedFields)
                {
                    FieldReference Field = new(P.Key, P.Value);
                    this.Fields.Add(Field);
                }
 
                this.RuleRanges.Clear();
                this.RuleRanges.Add(new RuleRangeModel(RuleRange.Caller, ServiceRef.Localizer[nameof(AppResources.CallerOnly)]));
 
                if (this.HasUser)
                    this.RuleRanges.Add(new RuleRangeModel("User", ServiceRef.Localizer[nameof(AppResources.ToUser)]));
 
                if (this.HasUser)
                    this.RuleRanges.Add(new RuleRangeModel("Service", ServiceRef.Localizer[nameof(AppResources.ToService)]));
 
                if (this.HasUser)
                    this.RuleRanges.Add(new RuleRangeModel("Device", ServiceRef.Localizer[nameof(AppResources.ToDevice)]));
 
                this.RuleRanges.Add(new RuleRangeModel(RuleRange.Domain, ServiceRef.Localizer[nameof(AppResources.EntireDomain), XmppClient.GetDomain(this.RemoteJid)]));
                this.RuleRanges.Add(new RuleRangeModel(RuleRange.All, ServiceRef.Localizer[nameof(AppResources.Everyone)]));
 
                this.SelectedRuleRangeIndex = 0;
            }
        }
 
        #region Properties
 
        public ObservableCollection<HumanReadableTag> Tags { get; }
 
        public ObservableCollection<HumanReadableTag> CallerTags { get; }
 
        public ObservableCollection<FieldReference> Fields { get; }
 
        public ObservableCollection<RuleRangeModel> RuleRanges { get; }
 
        [ObservableProperty]
        private string? bareJid;
 
        [ObservableProperty]
        private string? friendlyName;
 
        [ObservableProperty]
        private string? remoteJid;
 
        [ObservableProperty]
        private string? remoteFriendlyName;
 
        [ObservableProperty]
        private bool remoteFriendlyNameAvailable;
 
        [ObservableProperty]
        private string? key;
 
        [ObservableProperty]
        private bool hasUser;
 
        [ObservableProperty]
        private bool hasService;
 
        [ObservableProperty]
        private bool hasDevice;
 
        [ObservableProperty]
        private string? provisioningService;
 
        [ObservableProperty]
        private bool callerInContactsList;
 
        [ObservableProperty]
        private int selectedRuleRangeIndex;
 
        [ObservableProperty]
        private FieldType fieldTypes;
 
        [ObservableProperty]
        [NotifyCanExecuteChangedFor(nameof(AcceptCommand))]
        private bool permitMomentary;
 
        [ObservableProperty]
        [NotifyCanExecuteChangedFor(nameof(AcceptCommand))]
        private bool permitIdentity;
 
        [ObservableProperty]
        [NotifyCanExecuteChangedFor(nameof(AcceptCommand))]
        private bool permitStatus;
 
        [ObservableProperty]
        [NotifyCanExecuteChangedFor(nameof(AcceptCommand))]
        private bool permitComputed;
 
        [ObservableProperty]
        [NotifyCanExecuteChangedFor(nameof(AcceptCommand))]
        private bool permitPeak;
 
        [ObservableProperty]
        [NotifyCanExecuteChangedFor(nameof(AcceptCommand))]
        private bool permitHistorical;
 
        [ObservableProperty]
        private string? nodeId;
 
        [ObservableProperty]
        private string? sourceId;
 
        [ObservableProperty]
        private string? partitionId;
 
        #endregion
 
        [RelayCommand]
        private static Task Click(object obj)
        {
            if (obj is HumanReadableTag Tag)
                return ViewClaimThingViewModel.LabelClicked(Tag.Name, Tag.Value, Tag.LocalizedValue);
            else if (obj is string s)
                return ViewClaimThingViewModel.LabelClicked(string.Empty, s, s);
            else
                return Task.CompletedTask;
        }
 
        [RelayCommand]
        private async Task AddContact()
        {
            if (!this.CallerInContactsList)
            {
                ContactInfo Info = new()
                {
                    BareJid = this.RemoteJid,
                    FriendlyName = (this.RemoteFriendlyNameAvailable ? this.RemoteFriendlyName : this.RemoteJid) ?? string.Empty
                };
 
                await Database.Insert(Info);
 
                this.CallerInContactsList = true;
            }
        }
 
        [RelayCommand]
        private async Task RemoveContact()
        {
            if (this.CallerInContactsList)
            {
                ContactInfo Info = await ContactInfo.FindByBareJid(this.RemoteJid ?? string.Empty);
                if (Info is not null)
                    await Database.Delete(Info);
 
                this.CallerInContactsList = false;
            }
        }
 
        [RelayCommand(CanExecute = nameof(CanExecuteAccept))]
        private void Accept()
        {
            this.Respond(true);
        }
 
        protected override void OnPropertyChanged(PropertyChangedEventArgs e)
        {
            base.OnPropertyChanged(e);
 
            switch (e.PropertyName)
            {
                case nameof(this.IsConnected):
                    this.AcceptCommand.NotifyCanExecuteChanged();
                    break;
            }
        }
 
        private bool CanExecuteAccept()
        {
            if (!this.IsConnected)
                return false;
 
            if (this.PermitMomentary || this.PermitIdentity || this.PermitStatus || this.PermitComputed || this.PermitPeak || this.PermitHistorical)
                return true;
 
            foreach (FieldReference Field in this.Fields)
            {
                if (Field.Permitted)
                    return true;
            }
 
            return false;
        }
 
        [RelayCommand(CanExecute = nameof(IsConnected))]
        private void Reject()
        {
            this.Respond(false);
        }
 
        private void Respond(bool Accepts)
        {
            if (this.SelectedRuleRangeIndex >= 0)
            {
                RuleRangeModel Range = this.RuleRanges[this.SelectedRuleRangeIndex];
                ThingReference Thing = new(this.NodeId, this.SourceId, this.PartitionId);
                FieldType FieldTypes = (FieldType)0;
 
                if (this.PermitMomentary)
                    FieldTypes |= FieldType.Momentary;
 
                if (this.PermitIdentity)
                    FieldTypes |= FieldType.Identity;
 
                if (this.PermitStatus)
                    FieldTypes |= FieldType.Status;
 
                if (this.PermitComputed)
                    FieldTypes |= FieldType.Computed;
 
                if (this.PermitPeak)
                    FieldTypes |= FieldType.Peak;
 
                if (this.PermitHistorical)
                    FieldTypes |= FieldType.Historical;
 
                if (Range.RuleRange is RuleRange RuleRange)
                {
                    ReadoutRequestResolver Resolver = new(this.BareJid ?? string.Empty, this.RemoteFriendlyName ?? string.Empty, RuleRange);
 
                    switch (RuleRange)
                    {
                        case RuleRange.Caller:
                        default:
                            ServiceRef.XmppService.CanReadResponseCaller(this.ProvisioningService ?? ServiceRef.TagProfile.ProvisioningJid ?? string.Empty,
                                this.BareJid!, this.RemoteJid!, this.Key!, Accepts, FieldTypes, this.GetFields(), Thing, this.ResponseHandler, Resolver);
                            break;
 
                        case RuleRange.Domain:
                            ServiceRef.XmppService.CanReadResponseDomain(this.ProvisioningService ?? ServiceRef.TagProfile.ProvisioningJid ?? string.Empty,
                                this.BareJid!, this.RemoteJid!, this.Key!, Accepts, FieldTypes, this.GetFields(), Thing, this.ResponseHandler, Resolver);
                            break;
 
                        case RuleRange.All:
                            ServiceRef.XmppService.CanReadResponseAll(this.ProvisioningService ?? ServiceRef.TagProfile.ProvisioningJid ?? string.Empty,
                                 this.BareJid!, this.RemoteJid!, this.Key!, Accepts, FieldTypes, this.GetFields(), Thing, this.ResponseHandler, Resolver);
                            break;
 
                    }
                }
                else if (Range.RuleRange is ProvisioningToken Token)
                {
                    ReadoutRequestResolver Resolver = new(this.BareJid ?? string.Empty, this.RemoteFriendlyName ?? string.Empty, Token);
 
                    switch (Token.Type)
                    {
                        case TokenType.User:
                            ServiceRef.XmppService.CanReadResponseUser(this.ProvisioningService ?? ServiceRef.TagProfile.ProvisioningJid ?? string.Empty,
                                this.BareJid!, this.RemoteJid!, this.Key!, Accepts, FieldTypes, this.GetFields(), Token.Token, Thing, this.ResponseHandler, Resolver);
                            break;
 
                        case TokenType.Service:
                            ServiceRef.XmppService.CanReadResponseService(this.ProvisioningService ?? ServiceRef.TagProfile.ProvisioningJid ?? string.Empty,
                                this.BareJid!, this.RemoteJid!, this.Key!, Accepts, FieldTypes, this.GetFields(), Token.Token, Thing, this.ResponseHandler, Resolver);
                            break;
 
                        case TokenType.Device:
                            ServiceRef.XmppService.CanReadResponseDevice(this.ProvisioningService ?? ServiceRef.TagProfile.ProvisioningJid ?? string.Empty,
                                this.BareJid!, this.RemoteJid!, this.Key!, Accepts, FieldTypes, this.GetFields(), Token.Token, Thing, this.ResponseHandler, Resolver);
                            break;
                    }
                }
            }
        }
 
        private string[]? GetFields()
        {
            List<string> Result = [];
            bool AllPermitted = true;
 
            foreach (FieldReference Field in this.Fields)
            {
                if (Field.Permitted)
                    Result.Add(Field.Name);
                else
                    AllPermitted = false;
            }
 
            if (AllPermitted)
                return null;
            else
                return [.. Result];
        }
 
        private async Task ResponseHandler(object? Sender, IqResultEventArgs e)
        {
            if (e.Ok)
            {
                if (this.@event is not null)
                    await ServiceRef.NotificationService.DeleteEvents(this.@event);
 
                await ServiceRef.NotificationService.DeleteResolvedEvents((IEventResolver)e.State);
 
                MainThread.BeginInvokeOnMainThread(async () =>
                {
                    await this.GoBack();
                });
            }
            else
            {
                MainThread.BeginInvokeOnMainThread(async () => await ServiceRef.UiService.DisplayException(e.StanzaError ??
                    new Exception(ServiceRef.Localizer[nameof(AppResources.UnableToRespond)])));
            }
        }
 
        [RelayCommand]
        private async Task Ignore()
        {
            if (this.@event is not null)
                await ServiceRef.NotificationService.DeleteEvents(this.@event);
 
            await this.GoBack();
        }
 
        [RelayCommand]
        private void AllFieldTypes()
        {
            this.PermitMomentary = true;
            this.PermitIdentity = true;
            this.PermitStatus = true;
            this.PermitComputed = true;
            this.PermitPeak = true;
            this.PermitHistorical = true;
        }
 
        [RelayCommand]
        private void NoFieldTypes()
        {
            this.PermitMomentary = false;
            this.PermitIdentity = false;
            this.PermitStatus = false;
            this.PermitComputed = false;
            this.PermitPeak = false;
            this.PermitHistorical = false;
        }
 
        [RelayCommand]
        private void AllFields()
        {
            foreach (FieldReference Field in this.Fields)
                Field.Permitted = true;
        }
 
        [RelayCommand]
        private void NoFields()
        {
            foreach (FieldReference Field in this.Fields)
                Field.Permitted = false;
        }
 
    }
}