featurehub-javascript-client-sdk/lib/index.js

FeatureHub client/browser SDK

import { EdgeFeatureHubConfig } from './edge_featurehub_config';
import { FeatureHubPollingClient } from './polling_sdk';
import { fhLog } from './feature_hub_config';
export * from './feature_state';
export * from './feature_hub_config';
export * from './edge_service';
export * from './client_feature_repository';
export * from './models/models';
export * from './analytics';
export * from './test_sdk';
export * from './polling_sdk';
export * from './middleware';
export * from './baggage_header';
export * from './interceptors';
export * from './client_context';
export * from './internal_feature_repository';
export * from './context_impl';
export * from './featurehub_repository';
export * from './edge_featurehub_config';
export * from './featurehub_eventsource';
export * from './local_context';
export class FeatureHub {
    static feature(key) { return this.context.feature(key); }
    static set(config, context) {
        window['fhConfig'] = config;
        window['fhContext'] = context;
    }
    static get context() {
        if (this.inBrowser) {
            const fhContext = window['fhContext'];
            if (fhContext) {
                return fhContext;
            }
        }
        throw new Error('No FeatureHub context defined');
    }
    static get config() {
        if (this.inBrowser) {
            const fhConfig = window['fhConfig'];
            if (fhConfig) {
                return fhConfig;
            }
        }
        throw new Error('No FeatureHub config defined');
    }
    static _initialize() {
        if (this.inBrowser) {
            const metaTags = document.getElementsByTagName('meta');
            const apiKeys = [];
            let pollInterval;
            let url;
            const params = [];
            for (let count = 0; count < metaTags.length; count++) {
                const name = metaTags[count].getAttribute('name');
                const content = metaTags[count].content;
                if (name === 'featurehub-url') {
                    url = content;
                }
                else if (name === 'featurehub-apiKey') {
                    apiKeys.push(content);
                }
                else if (name === 'featurehub-interval') {
                    pollInterval = content;
                }
                else if (name === null || name === void 0 ? void 0 : name.startsWith('featurehub-')) {
                    params.push([name.substring(11), content]);
                }
            }
            if (apiKeys.length > 0) {
                if (pollInterval) {
                    const _interval = pollInterval;
                    fhLog.trace('setting polling interval to', pollInterval);
                    EdgeFeatureHubConfig.defaultEdgeServiceSupplier =
                        (repo, config) => new FeatureHubPollingClient(repo, config, parseInt(_interval));
                }
                const config = EdgeFeatureHubConfig.config(url || 'https://app.featurehub.io/vanilla', apiKeys[0]);
                if (apiKeys.length > 1) {
                    for (let count = 1; count < apiKeys.length; count++) {
                        config.apiKey(apiKeys[count]);
                    }
                }
                const context = config.newContext();
                for (let count = 0; count < params.length; count++) {
                    context.attributeValue(params[count][0], params[count][1]);
                }
                context.build();
                this.set(config, context);
            }
        }
    }
    static close() {
        this.config.close();
    }
}
FeatureHub.inBrowser = (typeof window !== 'undefined' && typeof document !== 'undefined');
FeatureHub._initialize();
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