UA-.NETStandard/tools/Opc.Ua.SourceGeneration/SourceGenerator.cs

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 *
 * OPC Foundation MIT License 1.00
 *
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 * obtaining a copy of this software and associated documentation
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using Microsoft.CodeAnalysis;
using Microsoft.Extensions.Logging;

namespace Opc.Ua.SourceGeneration
{
    internal static class SourceGenerator
    {
        /// <summary>
        /// The namespace prefix for generated code
        /// </summary>
        public const string Name = nameof(ModelSourceGenerator);

        public static readonly DiagnosticDescriptor GenericError = new(
            id: "MODELGEN001",
            title: "Error",
            messageFormat: (LocalizableString)"Error during model generation '{0}'",
            category: Name,
            DiagnosticSeverity.Error,
            isEnabledByDefault: true,
            helpLinkUri: "www.opcfoundation.org",
            customTags: ["opcua"]);

        public static readonly DiagnosticDescriptor GenericWarning = new(
            id: "MODELGEN002",
            title: "Warning",
            messageFormat: (LocalizableString)"Warning during model generation '{0}'",
            category: Name,
            DiagnosticSeverity.Warning,
            isEnabledByDefault: true,
            helpLinkUri: "www.opcfoundation.org",
            customTags: ["opcua"]);

        public static readonly DiagnosticDescriptor Exception = new(
            id: "MODELGEN003",
            title: "Exception",
            messageFormat: (LocalizableString)"Exception during model generation '{0}': {1}",
            category: Name,
            DiagnosticSeverity.Error,
            isEnabledByDefault: true,
            helpLinkUri: "www.opcfoundation.org",
            customTags: ["opcua"]);

        public static readonly DiagnosticDescriptor ModelOverrideSkipped = new(
            id: "MODELGEN013",
            title: "Model already provided by referenced assembly",
            messageFormat: (LocalizableString)("Model URI '{0}' is already provided by " +
                "referenced assembly '{1}' under prefix '{2}'; skipping local generation"),
            category: Name,
            DiagnosticSeverity.Info,
            isEnabledByDefault: true,
            helpLinkUri: "www.opcfoundation.org",
            customTags: ["opcua"]);

        public static readonly DiagnosticDescriptor ModelDependencyTieBreak = new(
            id: "MODELGEN012",
            title: "Multiple referenced assemblies expose same model",
            messageFormat: (LocalizableString)("Multiple referenced assemblies provide model " +
                "URI '{0}'; selected '{1}' and ignored '{2}'"),
            category: Name,
            DiagnosticSeverity.Info,
            isEnabledByDefault: true,
            helpLinkUri: "www.opcfoundation.org",
            customTags: ["opcua"]);

        /// <summary>
        /// A <c>[NodeManager]</c> attribute could not be bound to a model
        /// design (no matching URI / Design selector).
        /// </summary>
        public static readonly DiagnosticDescriptor NodeManagerBindingError = new(
            id: "MODELGEN010",
            title: "[NodeManager] binding error",
            messageFormat: (LocalizableString)"{0}",
            category: Name,
            DiagnosticSeverity.Warning,
            isEnabledByDefault: true,
            helpLinkUri: "www.opcfoundation.org",
            customTags: ["opcua"]);

        /// <summary>
        /// A class annotated with <c>[NodeManager]</c> is not declared
        /// <c>partial</c>.
        /// </summary>
        public static readonly DiagnosticDescriptor NodeManagerNotPartial = new(
            id: "MODELGEN011",
            title: "[NodeManager] class must be partial",
            messageFormat: (LocalizableString)"Class '{0}' annotated with [NodeManager] must be declared as partial",
            category: Name,
            DiagnosticSeverity.Error,
            isEnabledByDefault: true,
            helpLinkUri: "www.opcfoundation.org",
            customTags: ["opcua"]);

        /// <summary>
        /// A BrowseName from the design model contained characters that
        /// required escaping when interpolated into a generated C# string
        /// literal (e.g. <c>"</c>, <c>\</c>, or a control character). The
        /// generator escapes the value via
        /// <see cref="StringLiteralEscaper"/> and continues; the warning
        /// surfaces the offending name so the design XML can be cleaned
        /// up. Defence-in-depth: protects the consuming build from a
        /// confusing compiler error if a third-party design XML pulled
        /// into a custom build carries an ill-formed BrowseName.
        /// </summary>
        public static readonly DiagnosticDescriptor BrowseNameUnsafe = new(
            id: "MODELGEN020",
            title: "BrowseName requires C# string-literal escaping (UASG_BROWSENAME_UNSAFE)",
            messageFormat: (LocalizableString)("BrowseName '{0}' contained characters that " +
                "required escaping when emitted into a C# string literal. The generator " +
                "escaped the value and continued; clean up the design XML to remove the " +
                "warning."),
            category: Name,
            DiagnosticSeverity.Warning,
            isEnabledByDefault: true,
            helpLinkUri: "www.opcfoundation.org",
            customTags: ["opcua"]);

        /// <summary>
        /// A <c>[DataType]</c> namespace argument could not be resolved before
        /// source generation.
        /// </summary>
        public static readonly DiagnosticDescriptor DataTypeNamespaceUnresolved = new(
            id: "MODELGEN021",
            title: "[DataType] namespace could not be resolved",
            messageFormat: (LocalizableString)("The Namespace argument '{1}' on [DataType] " +
                "type '{0}' could not be resolved during source generation. Use a string " +
                "literal or a const declared in source or a referenced assembly; values " +
                "generated in the same compilation are unavailable."),
            category: Name,
            DiagnosticSeverity.Error,
            isEnabledByDefault: true,
            helpLinkUri: "www.opcfoundation.org",
            customTags: ["opcua"]);

        /// <summary>
        /// Get diagnostic descriptor for event id
        /// </summary>
        public static bool TryGetDiagnostic(
            LogLevel logLevel,
            EventId eventId,
            out DiagnosticDescriptor descriptor)
        {
            descriptor = eventId.Id switch
            {
                1 => GenericError,
                2 => GenericWarning,
                3 => Exception,
                20 => BrowseNameUnsafe,
                _ => logLevel switch
                {
                    LogLevel.Error => GenericError,
                    LogLevel.Warning => GenericWarning,
                    _ => null
                }
            };
            return descriptor != null;
        }
    }
}