improvement: Slug Validation Errors (#2788)

* improvement: Slug Validation Errors

backend/src/server/lib/schemas.ts

@@ -0,0 +1,23 @@
+import slugify from "@sindresorhus/slugify";
+import { z } from "zod";
+
+interface SlugSchemaInputs {
+  min?: number;
+  max?: number;
+  field?: string;
+}
+
+export const slugSchema = ({ min = 1, max = 32, field = "Slug" }: SlugSchemaInputs = {}) => {
+  return z
+    .string()
+    .trim()
+    .min(min, {
+      message: `${field} field must be at least ${min} lowercase character${min === 1 ? "" : "s"}`
+    })
+    .max(max, {
+      message: `${field} field must be at most ${max} lowercase character${max === 1 ? "" : "s"}`
+    })
+    .refine((v) => slugify(v, { lowercase: true }) === v, {
+      message: `${field} field can only contain lowercase letters, numbers, and hyphens`
+    });
+};