mcp-vala/src/types/protocol.vala

/*
 * Copyright (C) 2025 Mcp-Vala Project
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Author: Mcp-Vala Project
 */


/**
 * MCP protocol types and data structures.
 * 
 * This namespace contains all the protocol-specific types defined by the MCP specification,
 * including server information, capabilities, and other core protocol data structures.
 */
namespace Mcp.Types.Protocol {
    /**
     * Server information as defined by the MCP protocol.
     */
    public class ServerInfo : GLib.Object {
        /**
         * The name of the server.
         */
        public string name { get; set; }
        
        /**
         * The version of the server.
         */
        public string version { get; set; }
        
        /**
         * Optional description of the server.
         */
        public string? description { get; set; }
        
        /**
         * Optional website URL for the server.
         */
        public string? website_url { get; set; }
        
        /**
         * Creates a new ServerInfo.
         * 
         * @param name Server name
         * @param version Server version
         */
        public ServerInfo (string name, string version) {
            this.name = name;
            this.version = version;
        }
        
        /**
         * Serializes ServerInfo to GLib.Variant.
         *
         * @return A GLib.Variant representing this ServerInfo
         */
        public Variant to_variant () {
            var builder = Mcp.Types.VariantUtils.new_dict_builder ();
            builder.add ("{sv}", "name", new Variant.string (name));
            builder.add ("{sv}", "version", new Variant.string (version));
            
            Mcp.Types.VariantUtils.add_string_if_not_null (builder, "description", description);
            Mcp.Types.VariantUtils.add_string_if_not_null (builder, "website_url", website_url);
            
            return builder.end ();
        }
        
        /**
         * Creates a ServerInfo from GLib.Variant.
         *
         * @param variant The GLib.Variant to deserialize
         * @return The deserialized ServerInfo
         * @throws Error If deserialization fails
         */
        public ServerInfo.from_variant (Variant variant) throws Error {
            if (!variant.is_of_type (VariantType.VARDICT)) {
                throw new Mcp.Core.McpError.PARSE_ERROR ("ServerInfo must be a dictionary");
            }
            
            if (variant.lookup_value ("name", null) == null) {
                throw new Mcp.Core.McpError.INVALID_REQUEST ("Missing name in ServerInfo");
            }
            
            if (variant.lookup_value ("version", null) == null) {
                throw new Mcp.Core.McpError.INVALID_REQUEST ("Missing version in ServerInfo");
            }
            
            this.name = variant.lookup_value ("name", VariantType.STRING).get_string ();
            this.version = variant.lookup_value ("version", VariantType.STRING).get_string ();
            
            if (variant.lookup_value ("description", null) != null) {
                this.description = variant.lookup_value ("description", VariantType.STRING).get_string ();
            }
            
            if (variant.lookup_value ("website_url", null) != null) {
                this.website_url = variant.lookup_value ("website_url", VariantType.STRING).get_string ();
            }
        }
    }
    
    /**
     * Server capabilities as defined by the MCP protocol.
     */
    public class ServerCapabilities : GLib.Object {
        /**
         * Whether logging is supported.
         */
        public bool logging { get; set; default = false; }
        
        /**
         * Whether completions are supported.
         */
        public bool completions { get; set; default = false; }
        
        /**
         * Optional prompts capabilities.
         */
        public PromptsCapabilities? prompts { get; set; }
        
        /**
         * Optional resources capabilities.
         */
        public ResourcesCapabilities? resources { get; set; }
        
        /**
         * Optional tools capabilities.
         */
        public ToolsCapabilities? tools { get; set; }
        
        /**
         * Creates a new ServerCapabilities.
         */
        public ServerCapabilities () {
        }
        
        /**
         * Serializes ServerCapabilities to GLib.Variant.
         *
         * @return A GLib.Variant representing this ServerCapabilities
         */
        public Variant to_variant () {
            var builder = Mcp.Types.VariantUtils.new_dict_builder ();
            
            if (logging) {
                builder.add ("{sv}", "logging", new Variant.boolean (logging));
            }
            
            if (completions) {
                builder.add ("{sv}", "completions", new Variant.boolean (completions));
            }
            
            Mcp.Types.VariantUtils.add_variant_if_not_null (builder, "prompts",
                prompts != null ? prompts.to_variant () : null);
            Mcp.Types.VariantUtils.add_variant_if_not_null (builder, "resources",
                resources != null ? resources.to_variant () : null);
            Mcp.Types.VariantUtils.add_variant_if_not_null (builder, "tools",
                tools != null ? tools.to_variant () : null);
            
            return builder.end ();
        }
        
        /**
         * Creates a ServerCapabilities from GLib.Variant.
         *
         * @param variant The GLib.Variant to deserialize
         * @return The deserialized ServerCapabilities
         * @throws Error If deserialization fails
         */
        public ServerCapabilities.from_variant (Variant variant) throws Error {
            if (!variant.is_of_type (VariantType.VARDICT)) {
                throw new Mcp.Core.McpError.PARSE_ERROR ("ServerCapabilities must be a dictionary");
            }
            
            if (variant.lookup_value ("logging", null) != null) {
                this.logging = variant.lookup_value ("logging", VariantType.BOOLEAN).get_boolean ();
            }
            
            if (variant.lookup_value ("completions", null) != null) {
                this.completions = variant.lookup_value ("completions", VariantType.BOOLEAN).get_boolean ();
            }
            
            if (variant.lookup_value ("prompts", null) != null) {
                this.prompts = new PromptsCapabilities.from_variant (variant.lookup_value ("prompts", VariantType.VARDICT));
            }
            
            if (variant.lookup_value ("resources", null) != null) {
                this.resources = new ResourcesCapabilities.from_variant (variant.lookup_value ("resources", VariantType.VARDICT));
            }
            
            if (variant.lookup_value ("tools", null) != null) {
                this.tools = new ToolsCapabilities.from_variant (variant.lookup_value ("tools", VariantType.VARDICT));
            }
        }
    }
    
    /**
     * Prompts capabilities.
     */
    public class PromptsCapabilities : GLib.Object {
        /**
         * Whether the list of prompts can change.
         */
        public bool list_changed { get; set; default = false; }
        
        /**
         * Creates a new PromptsCapabilities.
         */
        public PromptsCapabilities () {
        }
        
        /**
         * Serializes PromptsCapabilities to GLib.Variant.
         *
         * @return A GLib.Variant representing this PromptsCapabilities
         */
        public Variant to_variant () {
            var builder = Mcp.Types.VariantUtils.new_dict_builder ();
            builder.add ("{sv}", "listChanged", new Variant.boolean (list_changed));
            
            return builder.end ();
        }
        
        /**
         * Creates a PromptsCapabilities from GLib.Variant.
         *
         * @param variant The GLib.Variant to deserialize
         * @return The deserialized PromptsCapabilities
         * @throws Error If deserialization fails
         */
        public PromptsCapabilities.from_variant (Variant variant) throws Error {
            if (!variant.is_of_type (VariantType.VARDICT)) {
                throw new Mcp.Core.McpError.PARSE_ERROR ("PromptsCapabilities must be a dictionary");
            }
            
            if (variant.lookup_value ("listChanged", null) != null) {
                this.list_changed = variant.lookup_value ("listChanged", VariantType.BOOLEAN).get_boolean ();
            }
        }
    }
    
    /**
     * Resources capabilities.
     */
    public class ResourcesCapabilities : GLib.Object {
        /**
         * Whether subscription is supported.
         */
        public bool subscribe { get; set; default = false; }
        
        /**
         * Whether the list of resources can change.
         */
        public bool list_changed { get; set; default = false; }
        
        /**
         * Creates a new ResourcesCapabilities.
         */
        public ResourcesCapabilities () {
        }
        
        /**
         * Serializes ResourcesCapabilities to GLib.Variant.
         *
         * @return A GLib.Variant representing this ResourcesCapabilities
         */
        public Variant to_variant () {
            var builder = Mcp.Types.VariantUtils.new_dict_builder ();
            builder.add ("{sv}", "subscribe", new Variant.boolean (subscribe));
            builder.add ("{sv}", "listChanged", new Variant.boolean (list_changed));
            
            return builder.end ();
        }
        
        /**
         * Creates a ResourcesCapabilities from GLib.Variant.
         *
         * @param variant The GLib.Variant to deserialize
         * @return The deserialized ResourcesCapabilities
         * @throws Error If deserialization fails
         */
        public ResourcesCapabilities.from_variant (Variant variant) throws Error {
            if (!variant.is_of_type (VariantType.VARDICT)) {
                throw new Mcp.Core.McpError.PARSE_ERROR ("ResourcesCapabilities must be a dictionary");
            }
            
            if (variant.lookup_value ("subscribe", null) != null) {
                this.subscribe = variant.lookup_value ("subscribe", VariantType.BOOLEAN).get_boolean ();
            }
            
            if (variant.lookup_value ("listChanged", null) != null) {
                this.list_changed = variant.lookup_value ("listChanged", VariantType.BOOLEAN).get_boolean ();
            }
        }
    }
    
    /**
     * Tools capabilities.
     */
    public class ToolsCapabilities : GLib.Object {
        /**
         * Whether the list of tools can change.
         */
        public bool list_changed { get; set; default = false; }
        
        /**
         * Creates a new ToolsCapabilities.
         */
        public ToolsCapabilities () {
        }
        
        /**
         * Serializes ToolsCapabilities to GLib.Variant.
         *
         * @return A GLib.Variant representing this ToolsCapabilities
         */
        public Variant to_variant () {
            var builder = Mcp.Types.VariantUtils.new_dict_builder ();
            builder.add ("{sv}", "listChanged", new Variant.boolean (list_changed));
            
            return builder.end ();
        }
        
        /**
         * Creates a ToolsCapabilities from GLib.Variant.
         *
         * @param variant The GLib.Variant to deserialize
         * @return The deserialized ToolsCapabilities
         * @throws Error If deserialization fails
         */
        public ToolsCapabilities.from_variant (Variant variant) throws Error {
            if (!variant.is_of_type (VariantType.VARDICT)) {
                throw new Mcp.Core.McpError.PARSE_ERROR ("ToolsCapabilities must be a dictionary");
            }
            
            if (variant.lookup_value ("listChanged", null) != null) {
                this.list_changed = variant.lookup_value ("listChanged", VariantType.BOOLEAN).get_boolean ();
            }
        }
    }
}