github.com/containers/libpod@v1.9.4-0.20220419124438-4284fd425507/libpod/events/filters.go (about)

     1  package events
     2  
     3  import (
     4  	"strings"
     5  	"time"
     6  
     7  	"github.com/containers/libpod/pkg/util"
     8  	"github.com/pkg/errors"
     9  )
    10  
    11  func generateEventFilter(filter, filterValue string) (func(e *Event) bool, error) {
    12  	switch strings.ToUpper(filter) {
    13  	case "CONTAINER":
    14  		return func(e *Event) bool {
    15  			if e.Type != Container {
    16  				return false
    17  			}
    18  			if e.Name == filterValue {
    19  				return true
    20  			}
    21  			return strings.HasPrefix(e.ID, filterValue)
    22  		}, nil
    23  	case "EVENT", "STATUS":
    24  		return func(e *Event) bool {
    25  			return string(e.Status) == filterValue
    26  		}, nil
    27  	case "IMAGE":
    28  		return func(e *Event) bool {
    29  			if e.Type != Image {
    30  				return false
    31  			}
    32  			if e.Name == filterValue {
    33  				return true
    34  			}
    35  			return strings.HasPrefix(e.ID, filterValue)
    36  		}, nil
    37  	case "POD":
    38  		return func(e *Event) bool {
    39  			if e.Type != Pod {
    40  				return false
    41  			}
    42  			if e.Name == filterValue {
    43  				return true
    44  			}
    45  			return strings.HasPrefix(e.ID, filterValue)
    46  		}, nil
    47  	case "VOLUME":
    48  		return func(e *Event) bool {
    49  			if e.Type != Volume {
    50  				return false
    51  			}
    52  			return strings.HasPrefix(e.ID, filterValue)
    53  		}, nil
    54  	case "TYPE":
    55  		return func(e *Event) bool {
    56  			return string(e.Type) == filterValue
    57  		}, nil
    58  	}
    59  	return nil, errors.Errorf("%s is an invalid filter", filter)
    60  }
    61  
    62  func generateEventSinceOption(timeSince time.Time) func(e *Event) bool {
    63  	return func(e *Event) bool {
    64  		return e.Time.After(timeSince)
    65  	}
    66  }
    67  
    68  func generateEventUntilOption(timeUntil time.Time) func(e *Event) bool {
    69  	return func(e *Event) bool {
    70  		return e.Time.Before(timeUntil)
    71  
    72  	}
    73  }
    74  
    75  func parseFilter(filter string) (string, string, error) {
    76  	filterSplit := strings.Split(filter, "=")
    77  	if len(filterSplit) != 2 {
    78  		return "", "", errors.Errorf("%s is an invalid filter", filter)
    79  	}
    80  	return filterSplit[0], filterSplit[1], nil
    81  }
    82  
    83  func generateEventOptions(filters []string, since, until string) ([]EventFilter, error) {
    84  	var options []EventFilter
    85  	for _, filter := range filters {
    86  		key, val, err := parseFilter(filter)
    87  		if err != nil {
    88  			return nil, err
    89  		}
    90  		funcFilter, err := generateEventFilter(key, val)
    91  		if err != nil {
    92  			return nil, err
    93  		}
    94  		options = append(options, funcFilter)
    95  	}
    96  
    97  	if len(since) > 0 {
    98  		timeSince, err := util.ParseInputTime(since)
    99  		if err != nil {
   100  			return nil, errors.Wrapf(err, "unable to convert since time of %s", since)
   101  		}
   102  		options = append(options, generateEventSinceOption(timeSince))
   103  	}
   104  
   105  	if len(until) > 0 {
   106  		timeUntil, err := util.ParseInputTime(until)
   107  		if err != nil {
   108  			return nil, errors.Wrapf(err, "unable to convert until time of %s", until)
   109  		}
   110  		options = append(options, generateEventUntilOption(timeUntil))
   111  	}
   112  	return options, nil
   113  }