feature-flags.js

"use strict";
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    if (k2 === undefined) k2 = k;
    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
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Object.defineProperty(exports, "__esModule", { value: true });
exports.createFeatureFlags = exports.GitHubFeatureFlags = exports.FeatureFlag = void 0;
const api_client_1 = require("./api-client");
const util = __importStar(require("./util"));
var FeatureFlag;
(function (FeatureFlag) {
    FeatureFlag["DatabaseUploadsEnabled"] = "database_uploads_enabled";
    FeatureFlag["MlPoweredQueriesEnabled"] = "ml_powered_queries_enabled";
    FeatureFlag["UploadsDomainEnabled"] = "uploads_domain_enabled";
})(FeatureFlag = exports.FeatureFlag || (exports.FeatureFlag = {}));
class GitHubFeatureFlags {
    constructor(gitHubVersion, apiDetails, repositoryNwo, logger) {
        this.gitHubVersion = gitHubVersion;
        this.apiDetails = apiDetails;
        this.repositoryNwo = repositoryNwo;
        this.logger = logger;
    }
    async getValue(flag) {
        const response = (await this.getApiResponse())[flag];
        if (response === undefined) {
            this.logger.debug(`Feature flag '${flag}' undefined in API response, considering it disabled.`);
            return false;
        }
        return response;
    }
    async preloadFeatureFlags() {
        await this.getApiResponse();
    }
    async getApiResponse() {
        const loadApiResponse = async () => {
            // Do nothing when not running against github.com
            if (this.gitHubVersion.type !== util.GitHubVariant.DOTCOM) {
                this.logger.debug("Not running against github.com. Disabling all feature flags.");
                return {};
            }
            const client = (0, api_client_1.getApiClient)(this.apiDetails);
            try {
                const response = await client.request("GET /repos/:owner/:repo/code-scanning/codeql-action/features", {
                    owner: this.repositoryNwo.owner,
                    repo: this.repositoryNwo.repo,
                });
                return response.data;
            }
            catch (e) {
                // Some feature flags, such as `ml_powered_queries_enabled` affect the produced alerts.
                // Considering these feature flags disabled in the event of a transient error could
                // therefore lead to alert churn. As a result, we crash if we cannot determine the value of
                // the feature flags.
                throw new Error(`Encountered an error while trying to load feature flags: ${e}`);
            }
        };
        const apiResponse = this.cachedApiResponse || (await loadApiResponse());
        this.cachedApiResponse = apiResponse;
        return apiResponse;
    }
}
exports.GitHubFeatureFlags = GitHubFeatureFlags;
/**
 * Create a feature flags instance with the specified set of enabled flags.
 *
 * This should be only used within tests.
 */
function createFeatureFlags(enabledFlags) {
    return {
        getValue: async (flag) => {
            return enabledFlags.includes(flag);
        },
    };
}
exports.createFeatureFlags = createFeatureFlags;
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