Initial content

Chapter 16/sportsstore/src/config/index.ts

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+import { readFileSync } from "fs";
+import { getEnvironment, Env } from "./environment";
+import { merge } from "./merge";
+
+const file = process.env.SERVER_CONFIG ?? "server.config.json"
+const data = JSON.parse(readFileSync(file).toString());
+
+try {
+    const envFile = getEnvironment().toString() + "." + file;
+    const envData = JSON.parse(readFileSync(envFile).toString());
+    merge(data, envData);
+} catch {
+    // do nothing - file doesn't exist or isn't readable
+}
+
+export const getConfig = (path: string, defaultVal: any = undefined) : any => {
+    const paths = path.split(":");
+    let val = data;
+    paths.forEach(p => val = val[p]);
+    return val ?? defaultVal;
+}
+
+export { getEnvironment, Env };