summaryrefslogtreecommitdiffstats
path: root/src/k8splugin/internal/rb/definition.go
blob: 65ae8e003ff75846bdd7c35f2901ea74911d1299 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
/*
 * Copyright 2018 Intel Corporation, Inc
 *
 * 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 rb

import (
	"bytes"
	"encoding/base64"
	"encoding/json"
	"io/ioutil"
	"log"
	"os"
	"path/filepath"

	"github.com/onap/multicloud-k8s/src/k8splugin/internal/db"

	pkgerrors "github.com/pkg/errors"
)

// Definition contains the parameters needed for resource bundle (rb) definitions
// It implements the interface for managing the definitions
type Definition struct {
	RBName      string            `json:"rb-name"`
	RBVersion   string            `json:"rb-version"`
	ChartName   string            `json:"chart-name"`
	Description string            `json:"description"`
	Labels      map[string]string `json:"labels"`
}

// DefinitionKey is the key structure that is used in the database
type DefinitionKey struct {
	RBName    string `json:"rb-name"`
	RBVersion string `json:"rb-version"`
}

// We will use json marshalling to convert to string to
// preserve the underlying structure.
func (dk DefinitionKey) String() string {
	out, err := json.Marshal(dk)
	if err != nil {
		return ""
	}

	return string(out)
}

// DefinitionManager is an interface exposes the resource bundle definition functionality
type DefinitionManager interface {
	Create(def Definition) (Definition, error)
	List(name string) ([]Definition, error)
	Get(name string, version string) (Definition, error)
	Delete(name string, version string) error
	Upload(name string, version string, inp []byte) error
}

// DefinitionClient implements the DefinitionManager
// It will also be used to maintain some localized state
type DefinitionClient struct {
	storeName           string
	tagMeta, tagContent string
}

// NewDefinitionClient returns an instance of the DefinitionClient
// which implements the DefinitionManager
// Uses rbdef collection in underlying db
func NewDefinitionClient() *DefinitionClient {
	return &DefinitionClient{
		storeName:  "rbdef",
		tagMeta:    "defmetadata",
		tagContent: "defcontent",
	}
}

// Create an entry for the resource in the database`
func (v *DefinitionClient) Create(def Definition) (Definition, error) {

	//Construct composite key consisting of name and version
	key := DefinitionKey{RBName: def.RBName, RBVersion: def.RBVersion}

	//Check if this definition already exists
	_, err := v.Get(def.RBName, def.RBVersion)
	if err == nil {
		return Definition{}, pkgerrors.New("Definition already exists")
	}

	err = db.DBconn.Create(v.storeName, key, v.tagMeta, def)
	if err != nil {
		return Definition{}, pkgerrors.Wrap(err, "Creating DB Entry")
	}

	return def, nil
}

// List all resource entry's versions in the database
func (v *DefinitionClient) List(name string) ([]Definition, error) {
	res, err := db.DBconn.ReadAll(v.storeName, v.tagMeta)
	if err != nil || len(res) == 0 {
		return []Definition{}, pkgerrors.Wrap(err, "Listing Resource Bundle Definitions")
	}

	var results []Definition
	for key, value := range res {
		//value is a byte array
		if len(value) > 0 {
			def := Definition{}
			err = db.DBconn.Unmarshal(value, &def)
			if err != nil {
				log.Printf("[Definition] Error Unmarshaling value for: %s", key)
				continue
			}

			//Select only the definitions that match name provided
			//If name is empty, return all
			if def.RBName == name || name == "" {
				results = append(results, def)
			}

		}
	}

	return results, nil
}

// Get returns the Resource Bundle Definition for corresponding ID
func (v *DefinitionClient) Get(name string, version string) (Definition, error) {

	//Construct the composite key to select the entry
	key := DefinitionKey{RBName: name, RBVersion: version}
	value, err := db.DBconn.Read(v.storeName, key, v.tagMeta)
	if err != nil {
		return Definition{}, pkgerrors.Wrap(err, "Get Resource Bundle definition")
	}

	//value is a byte array
	if value != nil {
		def := Definition{}
		err = db.DBconn.Unmarshal(value, &def)
		if err != nil {
			return Definition{}, pkgerrors.Wrap(err, "Unmarshaling Value")
		}
		return def, nil
	}

	return Definition{}, pkgerrors.New("Error getting Resource Bundle Definition")
}

// Delete the Resource Bundle definition from database
func (v *DefinitionClient) Delete(name string, version string) error {

	//Construct the composite key to select the entry
	key := DefinitionKey{RBName: name, RBVersion: version}
	err := db.DBconn.Delete(v.storeName, key, v.tagMeta)
	if err != nil {
		return pkgerrors.Wrap(err, "Delete Resource Bundle Definition")
	}

	//Delete the content when the delete operation happens
	err = db.DBconn.Delete(v.storeName, key, v.tagContent)
	if err != nil {
		return pkgerrors.Wrap(err, "Delete Resource Bundle Definition Content")
	}

	return nil
}

// Upload the contents of resource bundle into database
func (v *DefinitionClient) Upload(name string, version string, inp []byte) error {

	//Check if definition metadata exists
	def, err := v.Get(name, version)
	if err != nil {
		return pkgerrors.Errorf("Invalid Definition ID provided: %s", err.Error())
	}

	err = isTarGz(bytes.NewBuffer(inp))
	if err != nil {
		return pkgerrors.Errorf("Error in file format: %s", err.Error())
	}

	//Construct the composite key to select the entry
	key := DefinitionKey{RBName: name, RBVersion: version}

	//Detect chart name from data if it was not provided originally
	if def.ChartName == "" {
		path, err := ExtractTarBall(bytes.NewBuffer(inp))
		if err != nil {
			return pkgerrors.Wrap(err, "Detecting chart name")
		}

		finfo, err := ioutil.ReadDir(path)
		if err != nil {
			return pkgerrors.Wrap(err, "Detecting chart name")
		}

		//Store the first directory with Chart.yaml found as the chart name
		for _, f := range finfo {
			if f.IsDir() {
				//Check if Chart.yaml exists
				if _, err = os.Stat(filepath.Join(path, f.Name(), "Chart.yaml")); err == nil {
					def.ChartName = f.Name()
					break
				}
			}
		}

		if def.ChartName == "" {
			return pkgerrors.New("Unable to detect chart name")
		}

		//TODO: Use db update api once db supports it.
		err = db.DBconn.Create(v.storeName, key, v.tagMeta, def)
		if err != nil {
			return pkgerrors.Wrap(err, "Storing updated chart metadata")
		}
	}

	//Encode given byte stream to text for storage
	encodedStr := base64.StdEncoding.EncodeToString(inp)
	err = db.DBconn.Create(v.storeName, key, v.tagContent, encodedStr)
	if err != nil {
		return pkgerrors.Errorf("Error uploading data to db: %s", err.Error())
	}

	return nil
}

// Download the contents of the resource bundle definition from DB
// Returns a byte array of the contents which is used by the
// ExtractTarBall code to create the folder structure on disk
func (v *DefinitionClient) Download(name string, version string) ([]byte, error) {

	//ignore the returned data here
	//Check if id is valid
	_, err := v.Get(name, version)
	if err != nil {
		return nil, pkgerrors.Errorf("Invalid Definition ID provided: %s", err.Error())
	}

	//Construct the composite key to select the entry
	key := DefinitionKey{RBName: name, RBVersion: version}
	value, err := db.DBconn.Read(v.storeName, key, v.tagContent)
	if err != nil {
		return nil, pkgerrors.Wrap(err, "Get Resource Bundle definition content")
	}

	if value != nil {
		//Decode the string from base64
		out, err := base64.StdEncoding.DecodeString(string(value))
		if err != nil {
			return nil, pkgerrors.Wrap(err, "Decode base64 string")
		}

		if out != nil && len(out) != 0 {
			return out, nil
		}
	}
	return nil, pkgerrors.New("Error downloading Definition content")
}