From ddd45e29745b73e7fe1684e197dcff598b375644 Mon Sep 17 00:00:00 2001
From: Armand Philippot <git@armandphilippot.com>
Date: Fri, 3 Nov 2023 19:34:16 +0100
Subject: feat(hooks): add an useForm hook

* add two "sub"-hooks: useFormValues and useFormSubmit (that
can be used independently)
* handle initial data
* handle custom submit callback
* handle data validation
* handle submit status
---
 .../use-form/use-form-submit/use-form-submit.ts    | 122 +++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 src/utils/hooks/use-form/use-form-submit/use-form-submit.ts

(limited to 'src/utils/hooks/use-form/use-form-submit/use-form-submit.ts')

diff --git a/src/utils/hooks/use-form/use-form-submit/use-form-submit.ts b/src/utils/hooks/use-form/use-form-submit/use-form-submit.ts
new file mode 100644
index 0000000..8d02395
--- /dev/null
+++ b/src/utils/hooks/use-form/use-form-submit/use-form-submit.ts
@@ -0,0 +1,122 @@
+import { useCallback, useState, type FormEvent } from 'react';
+import type { DataValidator, Maybe, Nullable } from '../../../../types';
+
+export type FormSubmitMessages = {
+  /**
+   * The message to use on error.
+   */
+  error: string;
+  /**
+   * The message to use on success.
+   */
+  success: string;
+};
+
+export type FormSubmitValidation<T> = {
+  /**
+   * A callback to handle submit validation.
+   */
+  validator: DataValidator<T>;
+  /**
+   * The messages to use on failure or success.
+   */
+  messages: Partial<FormSubmitMessages>;
+};
+
+export type FormSubmitHandler<T> = (
+  data: T
+) => Maybe<FormSubmitValidation<T>> | Promise<Maybe<FormSubmitValidation<T>>>;
+
+export type FormSubmitStatus = 'IDLE' | 'PENDING' | 'FAILED' | 'SUCCEEDED';
+
+export type FormHandlers<T extends Record<string, unknown>> = {
+  /**
+   * A callback function to handle submit failure.
+   */
+  onFailure: () => void;
+  /**
+   * A callback function to handle submit success.
+   */
+  onSuccess: () => void;
+  /**
+   * A callback function to handle submit.
+   */
+  submit: FormSubmitHandler<T>;
+};
+
+export type UseFormSubmitReturn = {
+  /**
+   * The message to use on submit failure or success.
+   */
+  messages: Nullable<Partial<FormSubmitMessages>>;
+  /**
+   * A method to handle form submit.
+   *
+   * @param {FormEvent<HTMLFormElement>} e - The event.
+   * @returns {Promise<void>}
+   */
+  submit: (e: FormEvent<HTMLFormElement>) => Promise<void>;
+  /**
+   * The submit status.
+   */
+  submitStatus: FormSubmitStatus;
+};
+
+/**
+ * React hook to handle form submit.
+ *
+ * @template {object} T - The object keys should match the fields name.
+ * @param {T} data - The form values.
+ * @param {Partial<FormHandlers<T>>} handlers - The submit handlers.
+ * @returns {UseFormSubmitReturn} A submit method, the status and messages.
+ */
+export const useFormSubmit = <T extends Record<string, unknown>>(
+  data: T,
+  handlers?: Partial<FormHandlers<T>>
+): UseFormSubmitReturn => {
+  const { onFailure, onSuccess, submit: submitHandler } = handlers ?? {};
+  const [messages, setMessages] =
+    useState<Nullable<Partial<FormSubmitMessages>>>(null);
+  const [submitStatus, setSubmitStatus] = useState<FormSubmitStatus>('IDLE');
+
+  const handleFailure = useCallback(() => {
+    setSubmitStatus('FAILED');
+    if (onFailure) onFailure();
+  }, [onFailure]);
+
+  const handleSuccess = useCallback(() => {
+    setSubmitStatus('SUCCEEDED');
+    if (onSuccess) onSuccess();
+  }, [onSuccess]);
+
+  const handleSubmit = useCallback(async () => {
+    const submitResult = submitHandler ? await submitHandler(data) : undefined;
+
+    if (!submitResult) {
+      handleSuccess();
+      return;
+    }
+
+    setMessages(submitResult.messages);
+
+    const isSuccess = submitResult.validator(data);
+
+    setSubmitStatus(isSuccess ? 'SUCCEEDED' : 'FAILED');
+
+    if (isSuccess) handleSuccess();
+    else handleFailure();
+  }, [data, handleFailure, handleSuccess, submitHandler]);
+
+  const submit = useCallback(
+    async (e: FormEvent<HTMLFormElement>) => {
+      e.preventDefault();
+      setMessages(null);
+      setSubmitStatus('PENDING');
+
+      return handleSubmit();
+    },
+    [handleSubmit]
+  );
+
+  return { messages, submit, submitStatus };
+};
-- 
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