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src/utilities.ts

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+import { Accessor, createEffect, createSignal, on } from "solid-js";
+
+export const splitAt = (
+  subject: string,
+  index: number,
+): readonly [string, string] => {
+  if (index < 0) {
+    return [subject, ""];
+  }
+
+  if (index > subject.length) {
+    return [subject, ""];
+  }
+
+  return [subject.slice(0, index), subject.slice(index + 1)];
+};
+
+export const toSlug = (subject: string) =>
+  subject.toLowerCase().replaceAll(" ", "-").replaceAll(/[^\w-]/gi, "");
+export const toHex = (subject: number) => subject.toString(16).padStart(2, "0");
+
+const encoder = new TextEncoder();
+export const hash = (
+  algorithm: AlgorithmIdentifier,
+  subject: Accessor<string | null | undefined>,
+) => {
+  const [hash, setHash] = createSignal<string>();
+
+  createEffect(
+    on(subject, async (subject) => {
+      if (subject === null || subject === undefined || subject.length === 0) {
+        setHash(undefined);
+
+        return;
+      }
+
+      const buffer = new Uint8Array(
+        await crypto.subtle.digest(algorithm, encoder.encode(subject)),
+      );
+
+      setHash(Array.from(buffer).map(toHex).join(""));
+    }),
+  );
+
+  return hash;
+};
+
+export const merge = (...objects: Record<string, any>[]): Record<string, any> => {
+  if (objects.length === 0) {
+    return {};
+  }
+
+  const target = objects[0];
+
+  for (const key of new Set(objects.map(o => Object.keys(o)).flat())) {
+    const values = objects.filter(o => Object.hasOwn(o, key)).map(o => o[key]);
+
+    target[key] = values.every(v => v && typeof v === 'object' && !Array.isArray(v)) ? merge(...values) : values.at(-1);
+  }
+
+  return target;
+};
+
+type CamelCase<S extends string> = S extends `${infer First}${infer Rest}` ? `${Lowercase<First>}${Rest}` : Lowercase<S>;
+export type CamelCased<T extends Record<string, any>> = {
+  [ K in keyof T as CamelCase<string&K>]: T[K];
+} & {};
+
+export const mapKeysToCamelCase = <T extends Record<string, any>>(subject: T): CamelCased<T> => Object.fromEntries(Object.entries(subject).map(([k, v]) => [`${k[0].toLowerCase()}${k.slice(1)}`, v])) as CamelCased<T>;