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package utils
import (
"fmt"
"regexp"
"strings"
"github.com/bettercap/bettercap/session"
"github.com/evilsocket/islazy/tui"
)
type ViewSelector struct {
owner *session.SessionModule
Filter string
filterName string
filterPrev string
Expression *regexp.Regexp
SortField string
Sort string
SortSymbol string
sortFields map[string]bool
sortName string
sortParser string
sortParse *regexp.Regexp
Limit int
limitName string
}
func ViewSelectorFor(m *session.SessionModule, prefix string, sortFields []string, defExpression string) *ViewSelector {
parser := "(" + strings.Join(sortFields, "|") + ") (desc|asc)"
s := &ViewSelector{
owner: m,
filterName: prefix + ".filter",
sortName: prefix + ".sort",
sortParser: parser,
sortParse: regexp.MustCompile(parser),
limitName: prefix + ".limit",
}
m.AddParam(session.NewStringParameter(s.filterName, "", "", "Defines a regular expression filter for "+prefix))
m.AddParam(session.NewStringParameter(
s.sortName,
defExpression,
s.sortParser,
"Defines sorting field ("+strings.Join(sortFields, ", ")+") and direction (asc or desc) for "+prefix))
m.AddParam(session.NewIntParameter(s.limitName, "0", "Defines limit for "+prefix))
s.parseSorting()
return s
}
func (s *ViewSelector) parseFilter() (err error) {
if err, s.Filter = s.owner.StringParam(s.filterName); err != nil {
return
}
if s.Filter != "" {
if s.Filter != s.filterPrev {
if s.Expression, err = regexp.Compile(s.Filter); err != nil {
return
}
}
} else {
s.Expression = nil
}
s.filterPrev = s.Filter
return
}
func (s *ViewSelector) parseSorting() (err error) {
expr := ""
if err, expr = s.owner.StringParam(s.sortName); err != nil {
return
}
tokens := s.sortParse.FindAllStringSubmatch(expr, -1)
if tokens == nil {
return fmt.Errorf("expression '%s' doesn't parse", expr)
}
s.SortField = tokens[0][1]
s.Sort = tokens[0][2]
s.SortSymbol = tui.Blue("▾")
if s.Sort == "asc" {
s.SortSymbol = tui.Blue("▴")
}
return
}
func (s *ViewSelector) Update() (err error) {
if err = s.parseFilter(); err != nil {
return
} else if err = s.parseSorting(); err != nil {
return
} else if err, s.Limit = s.owner.IntParam(s.limitName); err != nil {
return
}
return
}
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