Refactor for using koa and dicebear

src/utils/server.ts

@@ -0,0 +1,20 @@
+import { NetworkInterfaceInfo, networkInterfaces } from "os";
+
+export const startServerLog = (port: number) => async () => {
+  const net = Object.values(networkInterfaces())
+    .flat()
+    .filter((v) => v?.family === "IPv4")
+    .sort((v) => (v!.internal ? -1 : 1)) as Array<NetworkInterfaceInfo>;
+
+  console.info("Server started successfully!");
+  console.info("You can now use the service.");
+
+  net.forEach(({ internal, address }) =>
+    console.info(
+      `\t${(internal ? "Local:" : "On Your Network:").padEnd(
+        20,
+        " "
+      )}http://${address}:${port}`
+    )
+  );
+};

src/utils/type-guards.ts

@@ -0,0 +1,18 @@
+import { ValidationError } from "joi";
+
+export const isValidationError = (error: unknown): error is ValidationError =>
+  error instanceof ValidationError;
+
+export const isValue = <T>(value: T | Array<T> | undefined): value is T =>
+  !!value && !Array.isArray(value);
+
+export const isSize = (value: unknown): value is string =>
+  !Array.isArray(value) &&
+  !isNaN(parseInt(value as string)) &&
+  parseInt(value as string) <= 512 &&
+  parseInt(value as string) >= 16;
+
+export const isStyle =
+  (validStyles: string[]) =>
+  <T>(value: T | Array<T> | undefined): value is T =>
+    !!value && !Array.isArray(value) && validStyles.includes(value as string);