forked from argoproj/argo-events
/
filter.go
227 lines (205 loc) · 5.97 KB
/
filter.go
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
/*
Copyright 2018 BlackRock, 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 dependencies
import (
"encoding/json"
"fmt"
"regexp"
"strconv"
"time"
"github.com/argoproj/argo-events/common"
"github.com/argoproj/argo-events/pkg/apis/sensor/v1alpha1"
"github.com/argoproj/argo-events/sensors/types"
"github.com/pkg/errors"
"github.com/tidwall/gjson"
)
func ApplyFilter(notification *types.Notification) error {
if notification.EventDependency.Filters == nil {
return nil
}
ok, err := filterEvent(notification.EventDependency.Filters, notification.Event)
if err != nil {
return err
}
if !ok {
return errors.Errorf("failed to apply filter on Event dependency %s", notification.EventDependency.Name)
}
return nil
}
// apply the filters to an Event
func filterEvent(filter *v1alpha1.EventDependencyFilter, event *v1alpha1.Event) (bool, error) {
dataFilter, err := filterData(filter.Data, event)
if err != nil {
return false, err
}
timeFilter, err := filterTime(filter.Time, event.Context.Time.Time)
if err != nil {
return false, err
}
ctxFilter := filterContext(filter.Context, event.Context)
return timeFilter && ctxFilter && dataFilter, err
}
// applyTimeFilter checks the eventTime against the timeFilter:
// 1. the eventTime is greater than or equal to the start time
// 2. the eventTime is less than the end time
// returns true if 1 and 2 are true and false otherwise
func filterTime(timeFilter *v1alpha1.TimeFilter, eventTime time.Time) (bool, error) {
if timeFilter != nil {
utc := time.Now().UTC()
currentTime := time.Date(utc.Year(), utc.Month(), utc.Day(), 0, 0, 0, 0, time.UTC).Format(common.StandardYYYYMMDDFormat)
if timeFilter.Start != "" && timeFilter.Stop != "" {
startTime, err := time.Parse(common.StandardTimeFormat, fmt.Sprintf("%s %s", currentTime, timeFilter.Start))
if err != nil {
return false, err
}
startTime = startTime.UTC()
stopTime, err := time.Parse(common.StandardTimeFormat, fmt.Sprintf("%s %s", currentTime, timeFilter.Stop))
if err != nil {
return false, err
}
stopTime = stopTime.UTC()
return (startTime.Before(eventTime) || stopTime.Equal(eventTime)) && eventTime.Before(stopTime), nil
}
if timeFilter.Start != "" {
// stop is nil - does not have an end
startTime, err := time.Parse(common.StandardTimeFormat, fmt.Sprintf("%s %s", currentTime, timeFilter.Start))
if err != nil {
return false, err
}
startTime = startTime.UTC()
return startTime.Before(eventTime) || startTime.Equal(eventTime), nil
}
if timeFilter.Stop != "" {
stopTime, err := time.Parse(common.StandardTimeFormat, fmt.Sprintf("%s %s", currentTime, timeFilter.Stop))
if err != nil {
return false, err
}
stopTime = stopTime.UTC()
return eventTime.Before(stopTime), nil
}
}
return true, nil
}
// applyContextFilter checks the expected EventContext against the actual EventContext
// values are only enforced if they are non-zero values
// map types check that the expected map is a subset of the actual map
func filterContext(expected *v1alpha1.EventContext, actual *v1alpha1.EventContext) bool {
if expected == nil {
return true
}
if actual == nil {
return false
}
res := true
if expected.Type != "" {
res = res && expected.Type == actual.Type
}
if expected.Subject != "" {
res = res && expected.Subject == actual.Subject
}
if expected.Source != "" {
res = res && expected.Source == actual.Source
}
if expected.DataContentType != "" {
res = res && expected.DataContentType == actual.DataContentType
}
return res
}
// applyDataFilter runs the dataFilter against the Event's data
// returns (true, nil) when data passes filters, false otherwise
func filterData(data []v1alpha1.DataFilter, event *v1alpha1.Event) (bool, error) {
if data == nil {
return true, nil
}
if event == nil {
return false, fmt.Errorf("nil Event")
}
payload := event.Data
if payload == nil {
return true, nil
}
var js *json.RawMessage
if err := json.Unmarshal(payload, &js); err != nil {
return false, err
}
var jsData []byte
jsData, err := json.Marshal(js)
if err != nil {
return false, err
}
filter:
for _, f := range data {
res := gjson.GetBytes(jsData, f.Path)
if !res.Exists() {
return false, nil
}
switch f.Type {
case v1alpha1.JSONTypeBool:
for _, value := range f.Value {
val, err := strconv.ParseBool(value)
if err != nil {
return false, err
}
if val == res.Bool() {
continue filter
}
}
return false, nil
case v1alpha1.JSONTypeNumber:
for _, value := range f.Value {
filterVal, err := strconv.ParseFloat(value, 64)
eventVal := res.Float()
if err != nil {
return false, err
}
switch f.Comparator {
case v1alpha1.GreaterThanOrEqualTo:
if eventVal >= filterVal {
continue filter
}
case v1alpha1.GreaterThan:
if eventVal > filterVal {
continue filter
}
case v1alpha1.LessThan:
if eventVal < filterVal {
continue filter
}
case v1alpha1.LessThanOrEqualTo:
if eventVal <= filterVal {
continue filter
}
case v1alpha1.EqualTo, v1alpha1.EmptyComparator:
if eventVal == filterVal {
continue filter
}
}
}
return false, nil
case v1alpha1.JSONTypeString:
for _, value := range f.Value {
exp, err := regexp.Compile(value)
if err != nil {
return false, err
}
if exp.Match([]byte(res.Str)) {
continue filter
}
}
return false, nil
default:
return false, fmt.Errorf("unsupported JSON type %s", f.Type)
}
}
return true, nil
}