oidc-lib/src/claimer_sts/config_builder.js

A library for creating OIDC Service Providers

module.exports = {
	build:  build
}

function build(pk, feature_config){
	var possibleError = 'error in build';
	try{
		// var issuerDirectory = process.cwd();
	
		// load the sts config
		possible_error = 'unexpected error reading sts_config';
		var stsConfigPath = __dirname + '/data/sts_config.json'; 
		var stsConfigString = pk.fs.readFileSync(stsConfigPath, {encoding: 'utf8'});
		var config = JSON.parse(stsConfigString);
		config.logging = pk.util.logging_integer(config.logging);

        // read the issuerTemplate file that adds default config to the issuer configurations
		possible_error = 'unexpected error reading issuer_config_template';
		var issuerTemplatePath = __dirname + '/data/issuer_config_template.json'; 
		var issuerTemplateString = pk.fs.readFileSync(issuerTemplatePath, {encoding: 'utf8'});

		// read the startup directory and check subdirectories for oidc_config files
		var featureConfigs = {};
		for (var client in feature_config){
			var feature = feature_config[client];
			var additionalCollections;

			// read the configuration and separate out the collections, deleting it
			// from the configuration
			if (feature.collections){
				additionalCollections = feature.collections;
				delete feature.collections;
			}

			possible_error = "Unable to set issuer using config.client in config_builder";
			const regExp = new RegExp(/\{\{issuer\}\}/g); // Throws SyntaxError
			var moduleIssuerTemplateString = issuerTemplateString.replace(regExp, client);

			// add all the elements in the moduleIssuerTemplate that aren't explicityly
			// defined in the module config file 
			possible_error = 'Conbfiguration Error - bad JSON processing issuerTemplateString (' + moduleIssuerTemplateString + ')';
			var moduleIssuerTemplate = JSON.parse(moduleIssuerTemplateString);
			for (var key in moduleIssuerTemplate){
				if (!feature[key]){
					feature[key] = moduleIssuerTemplate[key];
				}
			}

			// reinsert the collections
			if (additionalCollections){
				var collections = feature.db.collections;
				for (var key in additionalCollections){
					if (collections[key]){
						pk.util.log_error('config_builder', 'collection present so cannot be added: ' + key);
						continue;
					}
					collections[key] = additionalCollections[key];
				}
			}

			featureConfigs[client] = feature;
		}

		config.content_modules = featureConfigs;
	}
	catch(err){
		pk.util.log_error(possible_error, err);
		pk.util.log_error('Fatal error - terminating')
		process.exit(-1);
	}
	return config;
}