71 lines
3.2 KiB
TypeScript
71 lines
3.2 KiB
TypeScript
const PREFIX = 'DWENGO_';
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const DB_PREFIX = PREFIX + 'DB_';
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const IDP_PREFIX = PREFIX + 'AUTH_';
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const STUDENT_IDP_PREFIX = IDP_PREFIX + 'STUDENT_';
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const TEACHER_IDP_PREFIX = IDP_PREFIX + 'TEACHER_';
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const CORS_PREFIX = PREFIX + 'CORS_';
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const LOGGING_PREFIX = PREFIX + 'LOGGING_';
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interface EnvVar {
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key: string;
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required?: boolean;
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defaultValue?: number | string | boolean;
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}
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export const envVars: Record<string, EnvVar> = {
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Port: { key: PREFIX + 'PORT', defaultValue: 3000 },
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LearningContentRepoApiBaseUrl: { key: PREFIX + 'LEARNING_CONTENT_REPO_API_BASE_URL', defaultValue: 'https://dwengo.org/backend/api' },
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FallbackLanguage: { key: PREFIX + 'FALLBACK_LANGUAGE', defaultValue: 'nl' },
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RunMode: { key: PREFIX + 'RUN_MODE', defaultValue: 'dev' },
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DbHost: { key: DB_PREFIX + 'HOST', required: true },
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DbPort: { key: DB_PREFIX + 'PORT', defaultValue: 5432 },
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DbName: { key: DB_PREFIX + 'NAME', defaultValue: 'dwengo' },
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DbUsername: { key: DB_PREFIX + 'USERNAME', required: true },
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DbPassword: { key: DB_PREFIX + 'PASSWORD', required: true },
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DbUpdate: { key: DB_PREFIX + 'UPDATE', defaultValue: false },
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UserContentPrefix: { key: DB_PREFIX + 'USER_CONTENT_PREFIX', defaultValue: 'u_' },
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IdpStudentUrl: { key: STUDENT_IDP_PREFIX + 'URL', required: true },
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IdpStudentClientId: { key: STUDENT_IDP_PREFIX + 'CLIENT_ID', required: true },
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IdpStudentJwksEndpoint: { key: STUDENT_IDP_PREFIX + 'JWKS_ENDPOINT', required: true },
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IdpTeacherUrl: { key: TEACHER_IDP_PREFIX + 'URL', required: true },
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IdpTeacherClientId: { key: TEACHER_IDP_PREFIX + 'CLIENT_ID', required: true },
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IdpTeacherJwksEndpoint: { key: TEACHER_IDP_PREFIX + 'JWKS_ENDPOINT', required: true },
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IdpAudience: { key: IDP_PREFIX + 'AUDIENCE', defaultValue: 'account' },
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CorsAllowedOrigins: { key: CORS_PREFIX + 'ALLOWED_ORIGINS', defaultValue: '' },
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CorsAllowedHeaders: { key: CORS_PREFIX + 'ALLOWED_HEADERS', defaultValue: 'Authorization,Content-Type' },
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LogLevel: { key: LOGGING_PREFIX + 'LEVEL', defaultValue: 'info' },
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LokiHost: { key: LOGGING_PREFIX + 'LOKI_HOST', defaultValue: 'http://localhost:3102' },
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} as const;
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/**
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* Returns the value of the given environment variable if it is set.
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* Otherwise,
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* - throw an error if the environment variable was required,
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* - return the default value if there is one and it was not required,
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* - return an empty string if the environment variable is not required and there is also no default.
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* @param envVar The properties of the environment variable (from the EnvVar object).
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*/
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export function getEnvVar(envVar: EnvVar): string {
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const value: string | undefined = process.env[envVar.key];
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if (value) {
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return value;
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} else if (envVar.required) {
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throw new Error(`Missing environment variable: ${envVar.key}`);
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} else {
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return String(envVar.defaultValue) || '';
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}
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}
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export function getNumericEnvVar(envVar: EnvVar): number {
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const valueString = getEnvVar(envVar);
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const value = parseInt(valueString);
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if (isNaN(value)) {
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throw new Error(`Invalid value for environment variable ${envVar.key}: ${valueString}. Expected a number.`);
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} else {
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return value;
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}
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}
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