functional-google-cloud/lib/PubSub.js

Google Cloud Utilities functions in Functional Programming Style

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getPayloadFromMessage = exports.getTopicFromPubSub = exports.publishToTopic = exports.publishBufferToTopic = exports.publishBufferToTopicTask = exports.getBufferFromPayload = exports.isPayload = void 0;
const E = __importStar(require("fp-ts/lib/Either"));
const R = __importStar(require("fp-ts/lib/Reader"));
const TaskEither_1 = require("functional-types/lib/fp-ts/TaskEither");
const ramda_1 = require("ramda");
// isPayload :: a -> bool
exports.isPayload = (a) => ramda_1.is(Object)(a);
// getBufferFromPayload :: Object -> Buffer
exports.getBufferFromPayload = ramda_1.pipe(JSON.stringify, Buffer.from);
// publishBufferToTopicTask :: Buffer -> ReaderTask Topic String
exports.publishBufferToTopicTask = (buffer) => (topic) => () => topic.publish(buffer);
// publishBufferToTopic :: Buffer -> ReaderTaskEither Topic String Error
exports.publishBufferToTopic = ramda_1.pipe(exports.publishBufferToTopicTask, R.map(TaskEither_1.fromTask));
// publishToTopic :: Payload -> ReaderTaskEither Topic String Error
exports.publishToTopic = ramda_1.pipe(exports.getBufferFromPayload, exports.publishBufferToTopic);
// getTopicFromPubSub :: string -> Reader PubSub Topic
exports.getTopicFromPubSub = (topic) => (pubSub) => pubSub.topic(topic);
// getPayloadFromMessage :: Message -> Either A Error
exports.getPayloadFromMessage = ramda_1.pipe(ramda_1.prop('data'), (buffer) => () => {
    const base64 = Buffer.from(buffer, 'base64');
    return JSON.parse(base64.toString());
}, (a) => E.tryCatch(a, E.toError), E.chain(E.fromPredicate(exports.isPayload, () => new Error('Message data is not a Payload instance.'))));
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