@cortical/core/api/context.js

A RESTful API framework for your apps based on GraphQL type system.

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
const events_1 = require("events");
const path_1 = require("path");
const __1 = require("..");
const url_1 = require("url");
const logger_1 = require("@spine/logger");
const paths_1 = require("../paths");
const expressRequestContextParams_1 = require("../hooks/expressRequestContextParams");
const webSocketTransportContextParams_1 = require("../hooks/webSocketTransportContextParams");
const context_1 = require("../hooks/context");
const contextExecution_1 = require("../hooks/contextExecution");
const __2 = require("..");
const url_2 = require("./url");
const config_1 = require("../config");
const getSchema_1 = require("../api/getSchema");
const contextId_1 = require("../hooks/contextId");
const contextExecutionId_1 = require("../hooks/contextExecutionId");
contextId_1.default.addFilter('default', () => {
    return `${(new Date()).getTime()}.${Math.floor(Math.random() * Math.pow(10, 5))}`;
});
const $$executions = Symbol();
const $$executionSeq = Symbol();
const $$end = Symbol();
contextExecutionId_1.default.addFilter('default', (value, { context }) => {
    if (typeof context[$$executionSeq] === 'undefined') {
        context[$$executionSeq] = -1;
    }
    context[$$executionSeq] = context[$$executionSeq] + 1;
    return `${context.id}.${context[$$executionSeq]}`;
});
function createContextId(context) {
    return contextId_1.default.filter(null, { context });
}
exports.createContextId = createContextId;
function createExecutionContextId(context, info) {
    return contextExecutionId_1.default.filter(null, { context, info });
}
exports.createExecutionContextId = createExecutionContextId;
const connections = new Set();
__1.hooks.bootstrap.addAction('connections', () => __awaiter(this, void 0, void 0, function* () {
    const closeConnections = () => {
        while (connections.size > 0) {
            for (const connection of connections.values()) {
                if (!connection.completed) {
                    connection.endAll();
                }
            }
        }
    };
    if (__1.hooks.bootstrap.has('server')) {
        __1.hooks.death.addActionAfter('server', 'connections', closeConnections);
    }
    else {
        __1.hooks.death.addAction('connections', closeConnections);
    }
}));
function createContextNamespace(context, info, id) {
    let { operationName, operationType, } = context;
    let namespace;
    if (typeof info !== 'undefined') {
        if (typeof operationType === 'undefined') {
            operationType = info.operation.operation;
        }
        if (typeof operationName === 'undefined'
            && typeof info.operation.name !== 'undefined') {
            operationName = info.operation.name.value;
        }
        operationType = `${operationType}.${info.fieldName}`;
        if (info.path.key !== info.fieldName) {
            if (typeof operationName === 'undefined') {
                operationName = '';
            }
            operationName = `${operationName}.${info.path.key}`;
        }
    }
    if (typeof operationType !== 'undefined') {
        namespace = `${operationType}`;
    }
    else {
        namespace = '';
    }
    if (typeof operationName !== 'undefined') {
        namespace = `${namespace}@${operationName}`;
    }
    return `${namespace}::${typeof id !== 'undefined' ? id : context.id}`;
}
exports.createContextNamespace = createContextNamespace;
class BaseContext {
    constructor(url, headers, params, operationName, operationType, id) {
        this.url = url;
        this.headers = headers;
        this.params = params;
        this.operationName = operationName;
        this.operationType = operationType;
        this.id = id;
        this.context = undefined;
        this.log = logger_1.logger(createContextNamespace(this));
        this.debug = this.log.debug.bind(this.log);
        this.event = new events_1.EventEmitter();
        this.schema = getSchema_1.getSchema();
        this[$$end] = [];
        this.execute = (document, variableValues, operationName) => __awaiter(this, void 0, void 0, function* () { return __2.execute(document, this.url, this.headers, this.params, variableValues, operationName); });
        this.subscribe = (document, variableValues, operationName) => __awaiter(this, void 0, void 0, function* () { return __2.subscribe(document, this.url, this.headers, this.params, variableValues, operationName); });
        Object.defineProperty(this, 'completed', { value: false, configurable: true });
        if (typeof this.id === 'undefined') {
            this.id = createContextId(this);
        }
        connections.add(this);
    }
    destroy(handler) {
        return this.once('destroy', handler);
    }
    on(event, handler) {
        return this.event.on(event, handler);
    }
    once(event, handler) {
        return this.event.once(event, handler);
    }
    removeListener(event, handler) {
        return this.event.removeListener(event, handler);
    }
    removeAllListeners(event) {
        return this.event.removeAllListeners(event);
    }
    emit(event, ...args) {
        return this.event.emit(event, ...args);
    }
    execution(info) {
        return createExecutionContext(this, info);
    }
    endAll(value, reason) {
        if (typeof value === 'function') {
            if (this.completed) {
                process.nextTick(value);
            }
            else {
                this[$$end].push(value);
            }
        }
        else {
            let self = this;
            if (self.completed) {
                throw new Error('The execution has already ended');
            }
            Object.defineProperty(self, 'completed', { value: true });
            process.nextTick(() => {
                (() => __awaiter(this, void 0, void 0, function* () {
                    self.completionReason = reason;
                    if (Array.isArray(value)) {
                        self.completionErrors = value;
                    }
                    else if (value instanceof Error) {
                        self.completionErrors = [value];
                    }
                    const handlers = self[$$end].splice(0, self[$$end].length);
                    yield Promise.all(handlers
                        .map((handler) => __awaiter(this, void 0, void 0, function* () { return handler(self.completionErrors, self.completionReason); }))
                        .map((promise) => promise.catch(error => console.log(error.stack))));
                    connections.delete(this);
                    self.event.emit('destroy', self.completionErrors, this.completionReason);
                }))().catch(error => {
                    console.log(error.stack);
                });
            });
        }
    }
    end(value, reason) {
        return this.endAll(value, reason);
    }
}
exports.BaseContext = BaseContext;
;
class BaseExecutionContext {
    constructor(context, info) {
        this.context = context;
        this.info = info;
        this.executionEvent = new events_1.EventEmitter();
        this.isExecution = true;
        this.id = createExecutionContextId(context, info);
        const namespace = createContextNamespace(context, info, this.id);
        this.log = logger_1.logger(`cortical:${namespace}`);
        this.debug = this.log.debug.bind(this.log);
        this[$$end] = [];
        if (typeof this[$$executions] === 'undefined') {
            this[$$executions] = [];
        }
        this[$$executions].push(this);
        Object.defineProperty(this, 'completed', { value: false, configurable: true });
        this.context.end((error, reason) => {
            if (!this.completed) {
                this.end(error, reason);
            }
        });
    }
    execution(info = this.info) {
        return this.context.execution(info);
    }
    destroy(handler) {
        return this.once('destroy', handler);
    }
    on(event, handler) {
        return this.executionEvent.on(event, handler);
    }
    once(event, handler) {
        return this.executionEvent.once(event, handler);
    }
    removeListener(event, handler) {
        return this.executionEvent.removeListener(event, handler);
    }
    removeAllListeners(event) {
        return this.executionEvent.removeAllListeners(event);
    }
    emit(event, ...args) {
        return this.executionEvent.emit(event, ...args);
    }
    end(value, reason) {
        if (typeof value === 'function') {
            if (this.completed) {
                process.nextTick(value);
            }
            else {
                this[$$end].push(value);
            }
        }
        else {
            const self = this;
            if (self.completed) {
                throw new Error('The execution has already ended');
            }
            Object.defineProperty(self, 'completed', { value: true });
            process.nextTick(() => {
                (() => __awaiter(this, void 0, void 0, function* () {
                    self.completionReason = reason;
                    if (value instanceof Error) {
                        self.completionError = value;
                    }
                    const handlers = self[$$end].splice(0, self[$$end].length);
                    yield Promise.all(handlers
                        .map((handler) => __awaiter(this, void 0, void 0, function* () { return handler(self.completionError, self.completionReason); }))
                        .map((promise) => promise.catch(error => console.log(error.stack))));
                    self.executionEvent.emit('destroy', self.completionError, this.completionReason);
                }))().catch(error => {
                    console.log(error.stack);
                });
            });
        }
    }
}
exports.BaseExecutionContext = BaseExecutionContext;
function createContext(url, headers, params, operationName, operationType, executionId) {
    return __awaiter(this, void 0, void 0, function* () {
        const { Context } = require(path_1.resolve(paths_1.getApiPath(), 'context'));
        const context = new Context(url, headers, params, operationName, operationType, executionId);
        yield context_1.default.do({ context, params });
        return context;
    });
}
exports.createContext = createContext;
function createExecutionContext(context, info) {
    return __awaiter(this, void 0, void 0, function* () {
        const execution = new BaseExecutionContext(context, info);
        yield contextExecution_1.default.do({ execution, context, info });
        for (const key in context) {
            if (!(key in execution) && typeof execution[key] === 'undefined') {
                const contextMethod = context[key];
                execution[key] = typeof contextMethod === 'function'
                    ? contextMethod.bind(context)
                    : contextMethod;
            }
        }
        return execution;
    });
}
exports.createExecutionContext = createExecutionContext;
function getOperationFromQuery(query) {
    const match = typeof query === 'string'
        ? query.match(/^\s*([^\s]+)(?:\s+([^\s]+))?\s*{/)
        : null;
    if (match != null) {
        return {
            operationName: match[2],
            operationType: match[1],
        };
    }
    return {
        operationName: undefined,
        operationType: undefined,
    };
}
exports.getOperationFromQuery = getOperationFromQuery;
function createContextFromExpressRequest(req, params) {
    return __awaiter(this, void 0, void 0, function* () {
        let contextParams = Object.assign({}, params);
        contextParams = expressRequestContextParams_1.default.filter(contextParams, { req, params });
        let operationName;
        let operationType;
        if (req.path === url_2.basePath(config_1.config.server.graphqlPath)) {
            let query;
            if (req.method === 'POST') {
                query = typeof req.body === 'object' && req.body != null ? req.body.query : undefined;
            }
            else {
                query = typeof req.query === 'object' && req.query != null ? req.query.query : undefined;
            }
            if (query != null) {
                ({
                    operationName,
                    operationType,
                } = getOperationFromQuery(query));
            }
        }
        return yield createContext(url_1.parse(req.originalUrl, true), req.headers, contextParams, operationName, operationType);
    });
}
exports.createContextFromExpressRequest = createContextFromExpressRequest;
function createContextFromWebSocketTransport(webSocket, message, params) {
    return __awaiter(this, void 0, void 0, function* () {
        const upgradeReq = webSocket.upgradeReq;
        let contextParams = Object.assign({}, (typeof message !== 'undefined' && typeof message.payload !== 'undefined' ? message.payload.context : null));
        contextParams = webSocketTransportContextParams_1.default.filter(contextParams, { webSocket, message, params });
        let operationName;
        let operationType;
        if (typeof params.query === 'string') {
            ({
                operationName,
                operationType
            } = getOperationFromQuery(params.query));
        }
        return yield createContext(url_1.parse(upgradeReq.url || '', true), upgradeReq.headers, contextParams, operationName, operationType);
    });
}
exports.createContextFromWebSocketTransport = createContextFromWebSocketTransport;
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