crossplane

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/*
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Copyright 2023 The Crossplane Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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    http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package upbound
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import (
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	"encoding/json"
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	"path/filepath"
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	"github.com/spf13/afero"
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	"github.com/crossplane/crossplane-runtime/pkg/errors"
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)
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const errInvalidTokenFile = "token file is invalid"
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// TokenFile is the format in which Upbound tokens are stored on disk.
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type TokenFile struct {
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	AccessID string `json:"accessId"`
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	Token    string `json:"token"`
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}
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// tokenConf is the configuration for obtaining a token.
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type tokenConf struct {
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	fs afero.Fs
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}
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// TokenOption modifies how a token is obtained.
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type TokenOption func(conf *tokenConf)
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// TokenFromPath extracts a token from the provided path.
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func TokenFromPath(path string, opts ...TokenOption) (TokenFile, error) {
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	conf := &tokenConf{
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		fs: afero.NewOsFs(),
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	}
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	for _, o := range opts {
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		o(conf)
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	}
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	tf := TokenFile{}
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	f, err := conf.fs.Open(filepath.Clean(path))
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	if err != nil {
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		return tf, err
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	}
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	defer f.Close() //nolint:errcheck // we don't care about the error
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	if err := json.NewDecoder(f).Decode(&tf); err != nil {
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		return tf, err
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	}
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	if tf.AccessID == "" || tf.Token == "" {
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		return tf, errors.New(errInvalidTokenFile)
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	}
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	return tf, nil
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}
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