From 7686d55df6309a457cd9efabb2ee9fc97c100447 Mon Sep 17 00:00:00 2001
From: Liam Fitzgerald <liam.fitzgerald@tlon.io>
Date: Tue, 30 Mar 2021 13:59:14 +1000
Subject: [PATCH] FormGroup: add component

---
 pkg/interface/src/logic/lib/formGroup.ts      |  18 +++
 .../src/views/components/FormGroup.tsx        | 134 ++++++++++++++++++
 2 files changed, 152 insertions(+)
 create mode 100644 pkg/interface/src/logic/lib/formGroup.ts
 create mode 100644 pkg/interface/src/views/components/FormGroup.tsx

diff --git a/pkg/interface/src/logic/lib/formGroup.ts b/pkg/interface/src/logic/lib/formGroup.ts
new file mode 100644
index 0000000000..e2f7ec7d79
--- /dev/null
+++ b/pkg/interface/src/logic/lib/formGroup.ts
@@ -0,0 +1,18 @@
+import React from "react";
+
+export type SubmitHandler = () => Promise<any>;
+interface IFormGroupContext {
+  addSubmit: (id: string, submit: SubmitHandler) => void;
+  onDirty: (id: string, touched: boolean) => void;
+  onErrors: (id: string, errors: boolean) => void;
+  submitAll: () => Promise<any>;
+}
+
+const fallback: IFormGroupContext = {
+  addSubmit: () => {},
+  onDirty: () => {},
+  onErrors: () => {},
+  submitAll: () => Promise.resolve(),
+};
+
+export const FormGroupContext = React.createContext(fallback);
diff --git a/pkg/interface/src/views/components/FormGroup.tsx b/pkg/interface/src/views/components/FormGroup.tsx
new file mode 100644
index 0000000000..6d78408e02
--- /dev/null
+++ b/pkg/interface/src/views/components/FormGroup.tsx
@@ -0,0 +1,134 @@
+import React, {
+  ReactNode,
+  useEffect,
+  useCallback,
+  useState,
+  useMemo,
+} from "react";
+import { Button, Box, Row, Col } from "@tlon/indigo-react";
+import _ from "lodash";
+import { useFormikContext } from "formik";
+import { PropFunc } from "~/types";
+import { FormGroupContext, SubmitHandler } from "~/logic/lib/formGroup";
+import { StatelessAsyncButton } from "./StatelessAsyncButton";
+
+export function useFormGroupContext(id: string) {
+  const ctx = React.useContext(FormGroupContext);
+  const addSubmit = useCallback(
+    (submit: SubmitHandler) => {
+      ctx.addSubmit(id, submit);
+    },
+    [ctx.addSubmit, id]
+  );
+  const onDirty = useCallback(
+    (dirty: boolean) => {
+      console.log(id, dirty);
+      ctx.onDirty(id, dirty);
+    },
+    [ctx.onDirty, id]
+  );
+
+  const onErrors = useCallback(
+    (errors: boolean) => {
+      ctx.onErrors(id, errors);
+    },
+    [ctx.onErrors, id]
+  );
+
+  return {
+    onDirty,
+    addSubmit,
+    onErrors,
+  };
+}
+
+export function FormGroupChild(props: { id: string }) {
+  const { id } = props;
+  const { addSubmit, onDirty, onErrors } = useFormGroupContext(id);
+  const { submitForm, dirty, errors } = useFormikContext();
+
+  useEffect(() => {
+    addSubmit(submitForm);
+  }, [submitForm]);
+
+  useEffect(() => {
+    onDirty(dirty);
+  }, [dirty, onDirty]);
+
+  useEffect(() => {
+    onErrors(_.keys(_.pickBy(errors, (s) => !!s)).length > 0);
+  }, [errors, onErrors]);
+
+  return <Box display="none" />;
+}
+
+export function FormGroup(props: PropFunc<typeof Box>) {
+  const { children, ...rest } = props;
+  const [submits, setSubmits] = useState({} as { [id: string]: SubmitHandler });
+  const [dirty, setDirty] = useState({} as Record<string, boolean>);
+  const [errors, setErrors] = useState({} as Record<string, boolean>);
+  const addSubmit = useCallback((id: string, s: SubmitHandler) => {
+    setSubmits((ss) => ({ ...ss, [id]: s }));
+  }, []);
+
+  const submitAll = useCallback(() => {
+    return Promise.all(
+      _.map(
+        _.pickBy(submits, (_v, k) => dirty[k]),
+        (f) => f()
+      )
+    );
+  }, [submits, dirty]);
+
+  const onDirty = useCallback(
+    (id: string, t: boolean) => {
+      setDirty((ts) => ({ ...ts, [id]: t }));
+    },
+    [setDirty]
+  );
+
+  const onErrors = useCallback((id: string, e: boolean) => {
+    setErrors((es) => ({ ...es, [id]: e }));
+  }, []);
+
+  const context = { addSubmit, submitAll, onErrors, onDirty };
+
+  const hasErrors = useMemo(
+    () => _.keys(_.pickBy(errors, (s) => !!s)).length > 0,
+    [errors]
+  );
+  const isDirty = useMemo(
+    () => _.keys(_.pickBy(dirty, _.identity)).length > 0,
+    [dirty]
+  );
+
+  return (
+    <Box {...rest} position="relative">
+      <FormGroupContext.Provider value={context}>
+        {children}
+      </FormGroupContext.Provider>
+      {isDirty && (
+        <Row
+          justifyContent="flex-end"
+          width="100%"
+          position="sticky"
+          bottom="0px"
+          p="3"
+          gapX="2"
+          backgroundColor="white"
+          borderTop="1"
+          borderTopColor="washedGray"
+        >
+          <Button>Cancel</Button>
+          <StatelessAsyncButton
+            onClick={submitAll}
+            disabled={hasErrors}
+            primary
+          >
+            Update
+          </StatelessAsyncButton>
+        </Row>
+      )}
+    </Box>
+  );
+}