src

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wlan.go (1004B)

      1 package wlan
      2 
      3 import (
      4 	"bufio"
      5 	"bytes"
      6 	"context"
      7 	"fmt"
      8 	"os/exec"
      9 	"strings"
     10 )
     11 
     12 type Block struct{}
     13 
     14 func New() *Block {
     15 	return &Block{}
     16 }
     17 
     18 func (b *Block) Name() string {
     19 	return "wlan"
     20 }
     21 
     22 // TODO: signal strength icon.
     23 func (b *Block) Render(ctx context.Context) (string, error) {
     24 	out, err := exec.CommandContext(
     25 		ctx, "iwctl", "station", "wlan0", "show",
     26 	).Output()
     27 	if err != nil {
     28 		return "", fmt.Errorf("exec iwctl failed: %v", err)
     29 	}
     30 
     31 	var (
     32 		scanner = bufio.NewScanner(bytes.NewReader(out))
     33 
     34 		state, network, ip, rssi string
     35 	)
     36 	for scanner.Scan() {
     37 		fields := strings.Fields(scanner.Text())
     38 		if len(fields) < 2 {
     39 			continue
     40 		}
     41 
     42 		switch {
     43 		case fields[0] == "State":
     44 			state = fields[1]
     45 		case fields[0] == "Connected":
     46 			network = fields[2]
     47 		case fields[0] == "IPv4":
     48 			ip = fields[2]
     49 		case fields[0] == "RSSI":
     50 			rssi = fields[1] + fields[2]
     51 		}
     52 	}
     53 
     54 	if state == "disconnected" {
     55 		return " ", nil
     56 	}
     57 	return fmt.Sprintf(" %s %s %s", network, ip, rssi), nil
     58 }