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|
package events
import (
"fmt"
"strings"
"time"
"github.com/containers/podman/v4/pkg/util"
)
func generateEventFilter(filter, filterValue string) (func(e *Event) bool, error) {
switch strings.ToUpper(filter) {
case "CONTAINER":
return func(e *Event) bool {
if e.Type != Container {
return false
}
if e.Name == filterValue {
return true
}
return strings.HasPrefix(e.ID, filterValue)
}, nil
case "EVENT", "STATUS":
return func(e *Event) bool {
return string(e.Status) == filterValue
}, nil
case "IMAGE":
return func(e *Event) bool {
if e.Type != Image {
return false
}
if e.Name == filterValue {
return true
}
return strings.HasPrefix(e.ID, filterValue)
}, nil
case "POD":
return func(e *Event) bool {
if e.Type != Pod {
return false
}
if e.Name == filterValue {
return true
}
return strings.HasPrefix(e.ID, filterValue)
}, nil
case "VOLUME":
return func(e *Event) bool {
if e.Type != Volume {
return false
}
return strings.HasPrefix(e.ID, filterValue)
}, nil
case "TYPE":
return func(e *Event) bool {
return string(e.Type) == filterValue
}, nil
case "LABEL":
return func(e *Event) bool {
var found bool
// iterate labels and see if we match a key and value
for eventKey, eventValue := range e.Attributes {
filterValueSplit := strings.SplitN(filterValue, "=", 2)
// if the filter isn't right, just return false
if len(filterValueSplit) < 2 {
return false
}
if eventKey == filterValueSplit[0] && eventValue == filterValueSplit[1] {
found = true
break
}
}
return found
}, nil
}
return nil, fmt.Errorf("%s is an invalid filter", filter)
}
func generateEventSinceOption(timeSince time.Time) func(e *Event) bool {
return func(e *Event) bool {
return e.Time.After(timeSince)
}
}
func generateEventUntilOption(timeUntil time.Time) func(e *Event) bool {
return func(e *Event) bool {
return e.Time.Before(timeUntil)
}
}
func parseFilter(filter string) (string, string, error) {
filterSplit := strings.SplitN(filter, "=", 2)
if len(filterSplit) != 2 {
return "", "", fmt.Errorf("%s is an invalid filter", filter)
}
return filterSplit[0], filterSplit[1], nil
}
// applyFilters applies the EventFilter slices in sequence. Filters under the
// same key are disjunctive while each key must match (conjuctive).
func applyFilters(event *Event, filterMap map[string][]EventFilter) bool {
for _, filters := range filterMap {
success := false
for _, filter := range filters {
if filter(event) {
success = true
break
}
}
if !success {
return false
}
}
return true
}
// generateEventFilter parses the specified filters into a filter map that can
// later on be used to filter events. Keys are conjunctive, values are
// disjunctive.
func generateEventFilters(filters []string, since, until string) (map[string][]EventFilter, error) {
filterMap := make(map[string][]EventFilter)
for _, filter := range filters {
key, val, err := parseFilter(filter)
if err != nil {
return nil, err
}
filterFunc, err := generateEventFilter(key, val)
if err != nil {
return nil, err
}
filterSlice := filterMap[key]
filterSlice = append(filterSlice, filterFunc)
filterMap[key] = filterSlice
}
if len(since) > 0 {
timeSince, err := util.ParseInputTime(since, true)
if err != nil {
return nil, fmt.Errorf("unable to convert since time of %s: %w", since, err)
}
filterFunc := generateEventSinceOption(timeSince)
filterMap["since"] = []EventFilter{filterFunc}
}
if len(until) > 0 {
timeUntil, err := util.ParseInputTime(until, false)
if err != nil {
return nil, fmt.Errorf("unable to convert until time of %s: %w", until, err)
}
filterFunc := generateEventUntilOption(timeUntil)
filterMap["until"] = []EventFilter{filterFunc}
}
return filterMap, nil
}
|
