fp-go/ioeither/file/file.go

// Copyright (c) 2023 IBM Corp.
// All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package file

import (
	"os"

	IOE "github.com/IBM/fp-go/ioeither"
)

var (
	// Open opens a file for reading
	Open = IOE.Eitherize1(os.Open)
	// ReadFile reads the context of a file
	ReadFile = IOE.Eitherize1(os.ReadFile)
	// WriteFile writes a data blob to a file
	WriteFile = func(dstName string, perm os.FileMode) func([]byte) IOE.IOEither[error, []byte] {
		return func(data []byte) IOE.IOEither[error, []byte] {
			return IOE.TryCatchError(func() ([]byte, error) {
				return data, os.WriteFile(dstName, data, perm)
			})
		}
	}
)