gpii-universal/gpii/node_modules/flowManager/src/RevisionGetHandler.js

Cross platform, core components of the GPII personalization infrastructure.

/*!
GPII GET /revision handler used by the Cloud Based Flowmanager

Copyright 2020 OCAD University

Licensed under the New BSD license. You may not use this file except in
compliance with this License.

You may obtain a copy of the License at
https://github.com/GPII/universal/blob/master/LICENSE.txt
*/

"use strict";

var fs = require("fs"),
    fluid = require("infusion"),
    gpii = fluid.registerNamespace("gpii");

fluid.defaults("gpii.flowManager.cloudBased.gpiiRevision.handler", {
    gradeNames: ["kettle.request.http"],
    invokers: {
        handleRequest: {
            funcName: "gpii.flowManager.cloudBased.gpiiRevision.handler.handleRequest",
            args: ["{gpii.flowManager.cloudBased}.options.gpiiRevisionPath", "{that}"]
        }
    }
});

gpii.flowManager.cloudBased.gpiiRevision.handler.reportError = function (that, filePath, errMsg) {
    fluid.log ("Error retrieving full git revision: '" + filePath + "'");
    that.events.onError.fire({
        isError: true,
        message: "Error retrieving full git revision: " + errMsg,
        statusCode: 404
    });
};

gpii.flowManager.cloudBased.gpiiRevision.handler.handleRequest = function (gpiiRevisionPath, that) {
    var errMsg;
    var fullPath = fluid.module.resolvePath(gpiiRevisionPath);
    var result = {sha256: ""};
    try {
        result = JSON.parse(fs.readFileSync(fullPath, "utf-8"));
        if (result.sha256.length === 0) {
            errMsg = "Missing revision value";
        }
    } catch (e) {
        errMsg = e.message;
    };
    if (!errMsg) {
        that.events.onSuccess.fire(result);
    } else {
        gpii.flowManager.cloudBased.gpiiRevision.handler.reportError(that, fullPath, errMsg);
    }
};