JsonResource.cs

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Waher.Content;
using Waher.Content.Json;
using Waher.Networking.HTTP.Mcp.Model.Server;
 
namespace Waher.Networking.HTTP.Mcp.Model.Resources
{
    public class JsonResource : Resource
    {
        private readonly Func<Task<object?>> read;
 
        public JsonResource(string Name, string Title, string Description, Uri Uri,
            Func<Task<object?>> Read, params KeyValuePair<string, object>[] MetaData)
            : base(Name, Title, Description, Uri, MetaData)
        {
            this.read = Read;
        }
 
        public JsonResource(string Name, string Title, string Description, Uri Uri,
            Func<Task<object?>> Read, string? RequiredPrivilege,
            params KeyValuePair<string, object>[] MetaData)
            : base(Name, Title, Description, Uri, RequiredPrivilege, MetaData)
        {
            this.read = Read;
        }
 
        public JsonResource(string Name, string Title, string Description, Uri Uri,
            Func<Task<object?>> Read, string? RequiredPrivilege, long? Size, 
            params KeyValuePair<string, object>[] MetaData)
            : base(Name, Title, Description, Uri, RequiredPrivilege, null, Size,
                  MetaData)
        {
            this.read = Read;
        }
 
        public JsonResource(string Name, string Title, string Description, Uri Uri,
            Func<Task<object?>> Read, string? RequiredPrivilege, long? Size, 
            Icon Icon, params KeyValuePair<string, object>[] MetaData)
            : base(Name, Title, Description, Uri, RequiredPrivilege, null, Size,
                  Icon, MetaData)
        {
            this.read = Read;
        }
 
        public JsonResource(string Name, string Title, string Description, Uri Uri,
            Func<Task<object?>> Read, string? RequiredPrivilege, long? Size, 
            Icons? Icons, params KeyValuePair<string, object>[] MetaData)
            : base(Name, Title, Description, Uri, RequiredPrivilege, null, Size,
                  Icons, MetaData)
        {
            this.read = Read;
        }
 
        public JsonResource(string Name, string Title, string Description, Uri Uri,
            Func<Task<object?>> Read, string? RequiredPrivilege, long? Size, 
            Icons? Icons, McpRole[]? Audience, double? Priority, DateTime? LastModified, 
            params KeyValuePair<string, object>[] MetaData)
            : base(Name, Title, Description, Uri, RequiredPrivilege, null, Size,
                  Icons, Audience, Priority, LastModified, MetaData)
        {
            this.read = Read;
        }
 
        public override async Task<IResourceContent[]> Read(
            Dictionary<string, object>? MetaData)
        {
            object? Result = await this.read();
            string s = JSON.Encode(Result, false);
 
            return new IResourceContent[]
            {
                new TextContent(this.Uri,s,JsonCodec.DefaultContentType,MetaData)
            };
        }
    }
}