ControlParameter.cs

using System.Threading.Tasks;
using System.Xml;
 
namespace Waher.Things.ControlParameters
{
    public abstract class ControlParameter
    {
        private readonly string name;
        private readonly string page;
        private readonly string label;
        private readonly string description;
 
        public ControlParameter(string Name, string Page, string Label, string Description)
        {
            this.name = Name;
            this.page = Page;
            this.label = Label;
            this.description = Description;
        }
 
        public string Name => this.name;
 
        public string Page => this.page;
 
        public string Label => this.label;
 
        public string Description => this.description;
 
        public abstract Task<bool> SetStringValue(IThingReference Node, string StringValue);
 
        public abstract Task<string> GetStringValue(IThingReference Node);
 
        public override bool Equals(object obj)
        {
            return
                this.GetType() == obj.GetType() &&
                this.name == ((ControlParameter)obj).name;
        }
 
        public override int GetHashCode()
        {
            return this.name.GetHashCode();
        }
 
        public virtual async Task ExportToForm(XmlWriter Output, IThingReference Node)
        {
            string StringValue = await this.GetStringValue(Node);
 
            Output.WriteStartElement("field");
            Output.WriteAttributeString("var", this.name);
            Output.WriteAttributeString("type", this.FormFieldType);
            Output.WriteAttributeString("label", this.label);
 
            Output.WriteElementString("desc", this.description);
            Output.WriteElementString("value", StringValue ?? string.Empty);
 
            await this.ExportValidationRules(Output, Node);
 
            Output.WriteElementString("xdd", "notSame", null, string.Empty);
            Output.WriteEndElement();
        }
 
        public virtual string FormFieldType
        {
            get { return "text-single"; }
        }
 
        public abstract Task ExportValidationRules(XmlWriter Output, IThingReference Node);
 
    }
}