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wlan.go (1151B)

      1 package wlan
      2 
      3 import (
      4 	"bufio"
      5 	"bytes"
      6 	"context"
      7 	"fmt"
      8 	"os/exec"
      9 	"strings"
     10 )
     11 
     12 // Config holds the configuration for the wlan block.
     13 type Config struct {
     14 	Iface string `json:"iface"`
     15 }
     16 
     17 type Block struct {
     18 	iface string
     19 }
     20 
     21 func New(iface string) *Block {
     22 	return &Block{iface: iface}
     23 }
     24 
     25 func (b *Block) Name() string {
     26 	return "wlan"
     27 }
     28 
     29 // TODO: signal strength icon.
     30 func (b *Block) Render(ctx context.Context) (string, error) {
     31 	out, err := exec.CommandContext(
     32 		ctx, "iwctl", "station", b.iface, "show",
     33 	).Output()
     34 	if err != nil {
     35 		return "", fmt.Errorf("exec iwctl failed: %v", err)
     36 	}
     37 
     38 	var (
     39 		scanner = bufio.NewScanner(bytes.NewReader(out))
     40 
     41 		state, network, ip, rssi string
     42 	)
     43 	for scanner.Scan() {
     44 		fields := strings.Fields(scanner.Text())
     45 		if len(fields) < 2 {
     46 			continue
     47 		}
     48 
     49 		switch {
     50 		case fields[0] == "State":
     51 			state = fields[1]
     52 		case fields[0] == "Connected":
     53 			network = fields[2]
     54 		case fields[0] == "IPv4":
     55 			ip = fields[2]
     56 		case fields[0] == "RSSI":
     57 			rssi = fields[1] + fields[2]
     58 		}
     59 	}
     60 
     61 	if state == "disconnected" {
     62 		return " ", nil
     63 	}
     64 	return fmt.Sprintf(" %s %s %s", network, ip, rssi), nil
     65 }