@node-in-layers/core/types.d.ts

The core library for the Node In Layers rapid web development framework.

import { DataDescription, ModelFactory, ModelInstanceFetcher, ModelType, JsonAble } from 'functional-models';
type ModelConstructor = Readonly<{
    create: <T extends DataDescription, TModelExtensions extends object = object, TModelInstanceExtensions extends object = object>(modelProps: ModelProps) => ModelType<T, TModelExtensions, TModelInstanceExtensions>;
}>;
/**
 * An app.
 * @interface
 */
type App = Readonly<{
    /**
     * The name of the app
     */
    name: string;
    /**
     * Optional: Services layer
     */
    services?: AppLayer<Config, any>;
    /**
     * Optional: Features layer
     */
    features?: AppLayer<Config, any>;
    /**
     * Optional: Globals layer
     */
    globals?: GlobalsLayer<Config, any>;
    /**
     * Optional: Models
     */
    models?: Record<string, ModelConstructor>;
}>;
/**
 * Log Levels
 */
declare enum LogLevel {
    TRACE = 0,
    DEBUG = 1,
    INFO = 2,
    WARN = 3,
    ERROR = 4,
    SILENT = 5
}
/**
 * Log Levels by names.
 */
declare enum LogLevelNames {
    trace = "trace",
    debug = "debug",
    info = "info",
    warn = "warn",
    error = "error",
    silent = "silent"
}
/**
 * A Promise or not a promise.
 */
type MaybePromise<T> = Promise<T> | T;
/**
 * The format of log messages to the console.
 */
declare enum LogFormat {
    /**
     * Console logs json
     */
    json = "json",
    /**
     * A custom logger. (Must provide a RootLogger via customLogger)
     */
    custom = "custom",
    /**
     * A simple datetime: message log format to console
     */
    simple = "simple",
    /**
     * Logs messages over TCP. Must provide tcp options in logOptions
     */
    tcp = "tcp",
    full = "full"
}
/**
 * A standardized error object.
 * @interface
 */
type ErrorObject = Readonly<{
    /**
     * Shows that this is an error object.
     */
    error: Readonly<{
        /**
         * A unique string code for the error
         */
        code: string;
        /**
         * A user friendly error message.
         */
        message: string;
        /**
         * Additional details in a string format.
         */
        details?: string;
        /**
         * Additional data as an object
         */
        data?: Record<string, JsonAble>;
        /**
         * A trace of the error
         */
        trace?: string;
        /**
         * A suberror that has the cause of the error.
         */
        cause?: ErrorObject;
    }>;
}>;
/**
 * Common props that can be passed between layers
 * @interface
 */
type CrossLayerProps<T extends object = object> = Readonly<{
    logging?: {
        ids?: readonly LogId[];
    };
}> & T;
/**
 * A very useful way to describe all layered functions, so that crossLayer
 * props can be passed through a system.
 * @example
 * ```typescript
 * type MyService = Readonly<{
 *   myFunc: LayerFunction<(myArg: string) => Promise<string>>
 * }>
 * ```
 * This creates an object...
 *
 * @example
 * ```typescript
 * {
 *   myFunc: (myArg: strinng, crossLayerProps) => Promise<string>
 * }
 * ```
 * @interface
 */
type LayerFunction<T extends (...args: any[]) => any> = T extends (...args: infer Args) => infer ReturnType ? (...args: [...Args, crossLayerProps?: CrossLayerProps]) => ReturnType : never;
/**
 * A function argument that types inputs and outputs.
 */
type TypedFunction<T, A extends Array<any>> = (...args: A) => T;
/**
 * A function that is wrapped with logging calls.
 */
type LogWrapSync<T, A extends Array<any>> = (functionLogger: FunctionLogger, ...args: A) => T;
/**
 * A function argument that types inputs and outputs and is a promise.
 */
type TypedFunctionAsync<T, A extends Array<any>> = (...args: A) => Promise<T>;
/**
 * An Async function that is wrapped with logging functions.
 */
type LogWrapAsync<T, A extends Array<any>> = (functionLogger: FunctionLogger, ...args: A) => Promise<T>;
/**
 * A function level logger.
 */
type FunctionLogger = Logger;
/**
 * A logger for a layer. (Services/Features/etc)
 * Already has the app's name appended to the logging data as well as the runtimeId.
 * @interface
 */
type LayerLogger = Logger & Readonly<{
    /**
     * A generic function for wrapping logs. Not generally intended to be used
     * by users, but used internally.
     * @param functionName - The name of the function
     * @param func - The function itself
     */
    _logWrap: <T, A extends Array<any>>(functionName: string, func: LogWrapAsync<T, A> | LogWrapSync<T, A>) => (...a: A) => Promise<T> | T;
    /**
     * Creates a logging wrap around a function. This should be used on asynchronous functions.
     * Executes the function when called but will create a start and end message.
     * The first argument is the logger, followed by the normal arguments.
     * Should automatically handle error logging as well.
     * NOTE: This function automatically handles crossLayerProps, assuming its the final argument in the function call.
     * @param functionName - The name of the function
     * @param func - The function itself
     */
    _logWrapAsync: <T, A extends Array<any>>(functionName: string, func: LogWrapAsync<T, A>) => (...a: A) => Promise<T>;
    /**
     * Creates a logging wrap around a synchronous function. This should be used on synchronous functions.
     * Executes the function when called but will create a start and end message.
     * The first argument is the logger, followed by the normal arguments.
     * Should automatically handle error logging as well.
     * NOTE: This function automatically handles crossLayerProps, assuming its the final argument in the function call.
     * @param functionName - The name of the function
     * @param func - The function itself
     */
    _logWrapSync: <T, A extends Array<any>>(functionName: string, func: LogWrapSync<T, A>) => (...a: A) => T;
    /**
     * Gets a function level logger. This is not the recommended logger for most uses especially within layers.
     * Use getInnerLogger.
     * A common pattern is to wrap the
     * @param name - The name of the function
     * @param crossLayerProps - Any additional crossLayerProps.
     */
    getFunctionLogger: (name: string, crossLayerProps?: CrossLayerProps) => FunctionLogger;
    /**
     * The primary recommended way to log within a function. Creates a logger within a function, makes sure the ids are passed along.
     * @param functionName - The name of the function
     * @param crossLayerProps - Any additional crossLayerProps.
     */
    getInnerLogger: (functionName: string, crossLayerProps?: CrossLayerProps) => FunctionLogger;
}>;
/**
 * A logger for an app.
 * @interface
 */
type AppLogger = Logger & Readonly<{
    getLayerLogger: (layerName: CommonLayerName | string, crossLayerProps?: CrossLayerProps) => LayerLogger;
}>;
type GetAppLogger = (appName: string) => AppLogger;
declare enum CommonLayerName {
    models = "models",
    services = "services",
    features = "features",
    entries = "entries"
}
/**
 * Options for a specific instance of logging.
 */
type LogInstanceOptions = Readonly<{
    ignoreSizeLimit?: boolean;
}>;
/**
 * A log object
 * @interface
 */
type Logger = Readonly<{
    /**
     * Trace statement
     * @param message - The logs message
     * @param dataOrError - An object of data, or an object with errors.
     */
    trace: (message: string, dataOrError?: Record<string, JsonAble | object> | ErrorObject, options?: LogInstanceOptions) => MaybePromise<void>;
    /**
     * Debug statement
     * @param msg
     */
    debug: (message: string, dataOrError?: Record<string, JsonAble | object> | ErrorObject, options?: LogInstanceOptions) => MaybePromise<void>;
    /**
     * An info statement
     * @param msg
     */
    info: (message: string, dataOrError?: Record<string, JsonAble | object> | ErrorObject, options?: LogInstanceOptions) => MaybePromise<void>;
    /**
     * Warning statement
     * @param msg
     */
    warn: (message: string, dataOrError?: Record<string, JsonAble | object> | ErrorObject, options?: LogInstanceOptions) => MaybePromise<void>;
    /**
     * An error statement.
     * @param msg
     */
    error: (message: string, dataOrError?: Record<string, JsonAble | object> | ErrorObject, options?: LogInstanceOptions) => MaybePromise<void>;
    /**
     * Embeds data, so that subsequent log messages (and loggers), can log that data without having to know details about it.
     * @param data
     */
    applyData: (data: Record<string, JsonAble>) => Logger;
    /**
     * Creates a logger by adding an id to the id stack.
     */
    getIdLogger: (name: string, logIdorKey: LogId | string, id?: string) => Logger;
    /**
     * Gets a sub logger.
     * @param name - The name of the sub logger.
     */
    getSubLogger: (name: string) => Logger;
    /**
     * Gets all ids associated with this logger. Useful for passing on.
     */
    getIds: () => readonly LogId[];
}>;
type HighLevelLogger = Logger & Readonly<{
    getAppLogger: GetAppLogger;
}>;
/**
 * A base level log object, that creates a logger
 * @interface
 */
type RootLogger<TConfig extends Config = Config> = Readonly<{
    /**
     * Gets a logger object wrapping the components.
     * @param context - Context used for configuring a logger.
     * @param props - Any additional logging information to include with the logger.
     */
    getLogger: (context: CommonContext<TConfig>, props?: {
        ids?: readonly LogId[];
        data?: Record<string, any>;
    }) => HighLevelLogger;
}>;
/**
 * A log id object.
 * @interface
 */
type LogId = Readonly<Record<string, string>>;
/**
 * A fully fleshed out log message.
 * @interface
 */
type LogMessage<T extends Record<string, JsonAble> = Record<string, JsonAble>> = Readonly<{
    /**
     * The unique id for this log message. Every log message has a unique id.
     */
    id: string;
    /**
     * The name of the logger. This is assembled from nested names joined with ':'.
     */
    logger: string;
    /**
     * The environment this log was produced in.
     */
    environment: string;
    /**
     * A stack of ids that get added on and removed. Useful for tracing
     * throughout a system. The first ones, are the oldest, and the last ones are the newest.
     */
    ids?: readonly LogId[];
    /**
     * The log level
     */
    logLevel: LogLevelNames;
    /**
     * The datetime of the message
     */
    datetime: Date;
    /**
     * The log's message
     */
    message: string;
}> & Partial<ErrorObject> & T;
/**
 * A base functionfunction that can handle a log message.
 */
type LogFunction = (logMessage: LogMessage) => void | Promise<void>;
/**
 * A method that can do logging once given a context.
 */
type LogMethod<TConfig extends Config = Config> = (context: CommonContext<TConfig>) => LogFunction;
/**
 * Core Namespaces.
 */
declare enum CoreNamespace {
    root = "@node-in-layers/core",
    globals = "@node-in-layers/core/globals",
    layers = "@node-in-layers/core/layers",
    models = "@node-in-layers/core/models"
}
/**
 * A generic layer
 */
type GenericLayer = Record<string, any>;
/**
 * Props that go into a model constructor.
 * @interface
 */
type ModelProps<TModelOverrides extends object = object, TModelInstanceOverrides extends object = object> = Readonly<{
    Model: ModelFactory<TModelOverrides, TModelOverrides>;
    fetcher: ModelInstanceFetcher<TModelOverrides, TModelInstanceOverrides>;
    getModel: <T extends DataDescription>(namespace: string, modelName: string) => () => ModelType<T, TModelOverrides, TModelInstanceOverrides>;
}>;
/**
 * Custom model properties. getModel is provided by the framework.
 * @interface
 */
type PartialModelProps<TModelOverrides extends object = object, TModelInstanceOverrides extends object = object> = Readonly<{
    Model: ModelFactory<TModelOverrides, TModelOverrides>;
    fetcher: ModelInstanceFetcher<TModelOverrides, TModelInstanceOverrides>;
}>;
/**
 * A function that can get model props from a services context.
 */
type GetModelPropsFunc = (context: ServicesContext, ...args: any[]) => PartialModelProps;
/**
 * Services for the layer app
 */
type LayerServices = Readonly<{
    /**
     * The standard default function for getting model props
     */
    getModelProps: (context: ServicesContext) => ModelProps;
    /**
     * Loads a layer.
     * @param app
     * @param layer
     * @param existingLayers
     */
    loadLayer: (app: App, layer: string, existingLayers: LayerContext) => MaybePromise<GenericLayer | undefined>;
}>;
/**
 * The services layer for the core layers app
 * @interface
 */
type LayerServicesLayer = {
    /**
     * A logger for this service.
     */
    log: LayerLogger;
    /**
     * Services
     */
    services: {
        [CoreNamespace.layers]: LayerServices;
    };
};
type LayerDescription = string | readonly string[];
/**
 * String model name, to either service name, or namespace, db key, and optional additional args.
 */
type ModelToModelFactoryNamespace = Record<string, string | [string, string] | [string, string, any[]]>;
/**
 * String namespace to namespace factory.
 */
type NamespaceToFactory = Record<string, ModelToModelFactoryNamespace>;
/**
 * The core configurations
 * @interface
 */
type CoreConfig = Readonly<{
    /**
     * Options for logging.
     */
    logging: {
        /**
         * The log level to log at. Anything below this level, and it'll be ignored.
         */
        logLevel: LogLevelNames;
        /**
         * The format of log messages. If multiple are included, then multiple logging approaches will be used.
         */
        logFormat: LogFormat | readonly LogFormat[];
        /**
         * The maximum number of characters a log can be. NOTE: This is the count of any optional data properties,
         * and does NOT include any core fields. Defaults to 50,000
         */
        maxLogSizeInCharacters?: number;
        /**
         * When logFormat is tcp, these options are used to configure AXIOS.
         */
        tcpLoggingOptions?: Readonly<{
            /**
             * The url to log to.
             */
            url: string;
            /**
             * Any headers that are needed, such api keys.
             */
            headers?: Record<string, string | object>;
        }>;
        /**
         * A custom RootLogger that replaces the default one.
         */
        customLogger?: RootLogger;
        /**
         * If using a function wrap with a LayerLogger, what LogLevel
         * should it be at?
         * Default: feature=info, services=trace everything else is debug
         */
        getFunctionWrapLogLevel?: (layerName: string, functionName?: string) => LogLevelNames;
        /**
         * Optional structure for NOT wrapping log messages around a layers function.
         * domain -> layer -> function
         *
         * You can also ignore ALL functions in a domain's layer.
         *
         * @example
         * ```javascript
         * {
         *   ignoreLayerFunctions: {
         *     '@node-in-layers/rest-api/express': {
         *       // We will ignore ALL of the express layer
         *       express: true,
         *
         *       // Ignore specific functions.
         *       features: {
         *         modelCrudsRouter: true,
         *         modelCrudsController: true,
         *       }
         *     },
         *     // This will ignore the entire layer.
         *     'myDomain.layer': true,
         *   }
         * }
         * ```
         * @interface
         */
        ignoreLayerFunctions?: Record<string, boolean | Record<string, Record<string, boolean> | boolean>>;
    };
    /**
     * The layers to be loaded, in their order.
     * Can be either string names for regular layers, or an array of strings, for a composite layer with multiple sub-layers.
     */
    layerOrder: readonly LayerDescription[];
    /**
     * Already loaded apps.
     * Most often take the form of doing require/imports directly in the config.
     */
    apps: readonly App[];
    /**
     * Optional: The namespace to the app.services that has a "getModelProps()" function used for loading models
     */
    modelFactory?: string;
    /**
     * Optional: When true, wrappers are built around models to bubble up CRUDS interfaces for models through services and features.
     */
    modelCruds?: boolean;
    /**
     * Optional: Provides granular getModelProps() for specific models.
     */
    customModelFactory?: NamespaceToFactory;
}>;
/**
 * A basic config object
 * @interface
 */
type Config = Readonly<{
    /**
     * The systems name
     */
    systemName: string;
    /**
     * The environment
     */
    environment: string;
    /**
     * Core level configurations
     */
    [CoreNamespace.root]: CoreConfig;
}>;
/**
 * A generic layer within an app
 * @interface
 */
type AppLayer<TConfig extends Config = Config, TContext extends object = object, TLayer extends object = object> = Readonly<{
    /**
     * Creates the layer.
     * @param context
     */
    create: (context: LayerContext<TConfig, TContext>) => MaybePromise<TLayer>;
}>;
/**
 * The base level context that everything recieves.
 * @interface
 */
type CommonContext<TConfig extends Config = Config> = Readonly<{
    /**
     * The configuration file.
     */
    config: TConfig;
    /**
     * A root logger.
     */
    rootLogger: RootLogger;
    /**
     * Constants.
     */
    constants: {
        /**
         * The environment
         */
        environment: string;
        /**
         * The working directory.
         */
        workingDirectory: string;
        /**
         * A uuid that represents the runtime.
         */
        runtimeId: string;
    };
}>;
/**
 * The context for a layer
 */
type LayerContext<TConfig extends Config = Config, TContext extends object = object> = CommonContext<TConfig> & TContext & {
    /**
     * The logger for this layer
     */
    log: LayerLogger;
};
/**
 * A context for layers that consume services. (Services and features generally)
 * @interface
 */
type ServicesContext<TConfig extends Config = Config, TServices extends object = object, TContext extends object = object> = LayerContext<TConfig, {
    /**
     * A models object that has namespace to an object that has "getModels()"
     */
    models: Record<string, {
        /**
         * Gets the models for this given namespace.
         */
        getModels: <TModelType extends ModelType<any>>() => Record<string, TModelType>;
    }>;
    /**
     * A services object.
     */
    services: TServices;
} & TContext>;
/**
 * A factory for creating the service.
 * @interface
 */
type ServicesLayerFactory<TConfig extends Config = Config, TServices extends object = object, TContext extends object = object, TLayer extends object = object> = Readonly<{
    /**
     * Creates the services layer
     * @param context
     */
    create: (context: ServicesContext<TConfig, TServices, TContext>) => TLayer;
}>;
type GlobalsLayer<TConfig extends Config = Config, TGlobals extends object = object> = Readonly<{
    create: (context: CommonContext<TConfig>) => Promise<TGlobals>;
}>;
/**
 * A context for layers that consume features. (Features and entries generally)
 * @interface
 */
type FeaturesContext<TConfig extends Config = Config, TServices extends object = object, TFeatures extends object = object, TGlobals extends object = object> = LayerContext<TConfig, {
    /**
     * Services
     */
    services: TServices;
    /**
     * Features
     */
    features: TFeatures;
} & TGlobals>;
type FeaturesLayerFactory<TConfig extends Config = Config, TContext extends object = object, TServices extends object = object, TFeatures extends object = object, TLayer extends object = object> = Readonly<{
    create: (context: FeaturesContext<TConfig, TServices, TFeatures, TContext>) => TLayer;
}>;
/**
 * Describes a complete system, with services and features.
 */
type System<TConfig extends Config = Config, TServices extends object = object, TFeatures extends object = object> = CommonContext<TConfig> & {
    services: TServices;
    features: TFeatures;
};
type Response<R> = R | ErrorObject;
export { Response, Config, App, LogFormat, LogLevel, LogLevelNames, AppLayer, LayerContext, ServicesContext, ServicesLayerFactory, FeaturesContext, System, RootLogger, CommonContext, CoreNamespace, FeaturesLayerFactory, Logger, LayerDescription, MaybePromise, LayerServices, GenericLayer, LayerServicesLayer, ModelProps, ModelConstructor, GetModelPropsFunc, PartialModelProps, LogMessage, LogFunction, LogMethod, LogId, CoreConfig, ErrorObject, CommonLayerName, CrossLayerProps, AppLogger, LayerLogger, FunctionLogger, HighLevelLogger, TypedFunction, TypedFunctionAsync, LogWrapSync, LogWrapAsync, LayerFunction, LogInstanceOptions, };