implement config

src/index.ts

@@ -1,17 +1,27 @@
 import logger from 'log'
+import * as yup from 'yup'
 
-import {Ok} from './helpers'
+import * as parsing from './parsing'
+import type {Ok} from './helpers'
 
-// TODO : re-export types used to describe schema
+export * as yup from 'yup'
 
 const log = logger('config')
 
-export async function parse<S>(schema: S): Promise<Ok<unknown>> {
-    log.info("Parse configuration from env")
+export async function parse<S extends yup.Maybe<yup.AnyObject>>(schema: yup.ObjectSchema<S>): Promise<Ok<S>> {
+    log.info("Parse from env")
 
-    // TODO : Read config from env
+    log.trace("Start parsing")
+    const config = await parsing.object(schema)
+    if (!config.ok) return config
 
-    // TODO : maybe double check config
+    log.trace("double-check")
+    const res = await schema.isValid(config.data, {strict: true})
+    if (!res) {
+        log.error("Double-check failed")
+        log.debug('Config', config.data)
+        return {ok: false}
+    }
 
-    return {ok: false}
+    return config
 }