web/src/components/PageComponents/Channel.tsx

import type React from "react";
import { useEffect, useState } from "react";

import { fromByteArray, toByteArray } from "base64-js";
import { Controller, useForm } from "react-hook-form";
import { toast } from "react-hot-toast";

import { ChannelSettingsValidation } from "@app/validation/channelSettings.js";
import { Form } from "@components/form/Form";
import { Input } from "@components/form/Input.js";
import { Select } from "@components/form/Select.js";
import { Toggle } from "@components/form/Toggle.js";
import { useDevice } from "@core/providers/useDevice.js";
import {
  ArrowPathIcon,
  EyeIcon,
  EyeSlashIcon
} from "@heroicons/react/24/outline";
import { classValidatorResolver } from "@hookform/resolvers/class-validator";
import { Protobuf } from "@meshtastic/meshtasticjs";

export interface SettingsPanelProps {
  channel: Protobuf.Channel;
}

export const Channel = ({ channel }: SettingsPanelProps): JSX.Element => {
  const { connection, addChannel } = useDevice();
  const [keySize, setKeySize] = useState<128 | 256>(256);
  const [pskHidden, setPskHidden] = useState(true);

  const {
    register,
    handleSubmit,
    formState: { errors, isDirty },
    reset,
    control,
    setValue
  } = useForm<ChannelSettingsValidation>({
    defaultValues: {
      enabled: [
        Protobuf.Channel_Role.SECONDARY,
        Protobuf.Channel_Role.PRIMARY
      ].find((role) => role === channel?.role)
        ? true
        : false,
      ...channel?.settings,
      psk: fromByteArray(channel?.settings?.psk ?? new Uint8Array(0))
    },
    resolver: classValidatorResolver(ChannelSettingsValidation)
  });

  useEffect(() => {
    reset({
      enabled: [
        Protobuf.Channel_Role.SECONDARY,
        Protobuf.Channel_Role.PRIMARY
      ].find((role) => role === channel?.role)
        ? true
        : false,
      ...channel?.settings,
      psk: fromByteArray(channel?.settings?.psk ?? new Uint8Array(0))
    });
  }, [channel, reset]);

  const onSubmit = handleSubmit((data) => {
    if (connection) {
      void toast.promise(
        connection
          .setChannel(
            new Protobuf.Channel({
              role:
                channel?.role === Protobuf.Channel_Role.PRIMARY
                  ? Protobuf.Channel_Role.PRIMARY
                  : data.enabled
                  ? Protobuf.Channel_Role.SECONDARY
                  : Protobuf.Channel_Role.DISABLED,
              index: channel?.index,
              settings: {
                ...data,
                psk: toByteArray(data.psk ?? "")
              }
            })
          )
          .then(() =>
            addChannel({
              config: new Protobuf.Channel({
                index: channel.index,
                role: channel.role,
                settings: {
                  ...data,
                  psk: toByteArray(data.psk ?? "")
                }
              }),
              lastInterraction: new Date(),
              messages: []
            })
          ),
        {
          loading: "Saving...",
          success: "Saved Channel",
          error: "No response received"
        }
      );
    }
  });

  return (
    <Form onSubmit={onSubmit}>
      {channel?.index !== 0 && (
        <>
          <Controller
            name="enabled"
            control={control}
            render={({ field: { value, ...rest } }) => (
              <Toggle
                label="Enabled"
                description="Description"
                checked={value}
                {...rest}
              />
            )}
          />
          <Input
            label="Name"
            description="Max transmit power in dBm"
            error={errors.name?.message}
            {...register("name")}
          />
        </>
      )}
      <Select
        label="Key Size"
        description="Desired size of generated key."
        value={keySize}
        onChange={(e): void => {
          setKeySize(parseInt(e.target.value) as 128 | 256);
        }}
        action={{
          icon: <ArrowPathIcon className="h-4" />,
          action: () => {
            const key = new Uint8Array(keySize / 8);
            crypto.getRandomValues(key);
            setValue("psk", fromByteArray(key), {
              shouldDirty: true
            });
          }
        }}
      >
        <option value={128}>128 Bit</option>
        <option value={256}>256 Bit</option>
      </Select>
      <Input
        width="100%"
        label="Pre-Shared Key"
        description="Channel key to encrypt data"
        type={pskHidden ? "password" : "text"}
        action={{
          icon: pskHidden ? (
            <EyeIcon className="w-4" />
          ) : (
            <EyeSlashIcon className="w-4" />
          ),
          action: () => {
            setPskHidden(!pskHidden);
          }
        }}
        error={errors.psk?.message}
        {...register("psk")}
      />
      <Controller
        name="uplinkEnabled"
        control={control}
        render={({ field: { value, ...rest } }) => (
          <Toggle
            label="Uplink Enabled"
            description="Send packets to designated MQTT server"
            checked={value}
            {...rest}
          />
        )}
      />
      <Controller
        name="downlinkEnabled"
        control={control}
        render={({ field: { value, ...rest } }) => (
          <Toggle
            label="Downlink Enabled"
            description="Recieve packets to designated MQTT server"
            checked={value}
            {...rest}
          />
        )}
      />
    </Form>
  );
};