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|
package main
import (
"bufio"
"bytes"
"fmt"
"io"
"log"
"net/http"
"os"
"path/filepath"
"regexp"
"strconv"
"strings"
"time"
"github.com/robfig/cron/v3"
)
type inputLine struct {
Schedule string
Task string
}
var lastSeenInput = map[inputLine]struct{}{}
var todoistToken string
var httpClient = http.Client{
Timeout: 10 * time.Second,
}
func main() {
if err := setToken(); err != nil {
log.Fatalf("setting token: %s", err)
}
p, err := inputFilePath()
if err != nil {
log.Fatalf("getting input file: %s", err)
}
c := cron.New()
for {
input, err := readInput(p)
if err != nil {
log.Printf("reading input: %s", err)
}
if inputChanged(lastSeenInput, input) {
lastSeenInput = input
c.Stop()
c := cron.New()
addJobs(c, input)
c.Start()
}
time.Sleep(time.Minute) // re-read the input file every minute
}
}
func setToken() error {
token := os.Getenv("TODOIST_TOKEN")
if token == "" {
return fmt.Errorf("TODOIST_TOKEN env var must be present and non-empty")
}
todoistToken = token
return nil
}
func inputFilePath() (string, error) {
args := os.Args
if len(args) != 2 {
return "", fmt.Errorf("expected one argument (input file path), got %d", len(args)-1)
}
p := filepath.Clean(args[1])
// While we're here, check that the input path actually exists and
// is stat-able.
if _, err := os.Stat(p); err != nil {
return "", fmt.Errorf("cannot stat input file: %w", err)
}
return p, nil
}
var inputFileRe = regexp.MustCompile(`([^\s]+\s+[^\s]+\s+[^\s]+\s+[^\s]+\s+[^\s]+)\s+(.*)`)
func readInput(p string) (map[inputLine]struct{}, error) {
input := map[inputLine]struct{}{}
f, err := os.Open(p)
if err != nil {
return nil, fmt.Errorf("opening '%s': %w", p, err)
}
defer f.Close()
scanner := bufio.NewScanner(f)
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text())
if line == "" {
continue
}
matches := inputFileRe.FindStringSubmatch(line)
if matches == nil || len(matches) != 1+2 {
log.Printf("failed to parse input line: '%s'", line)
}
input[inputLine{Schedule: matches[1], Task: matches[2]}] = struct{}{}
}
if err := scanner.Err(); err != nil {
return nil, fmt.Errorf("scanning: %w", err)
}
return input, nil
}
func inputChanged(old, new map[inputLine]struct{}) bool {
if len(new) != len(old) {
return true
}
for k := range old {
if _, ok := new[k]; !ok {
return true
}
}
return false
}
func createTask(task string) {
jsonBody := []byte(fmt.Sprintf(`{"content": %s}`, strconv.Quote(task)))
req, err := http.NewRequest(
http.MethodPost,
"https://api.todoist.com/api/v1/tasks",
bytes.NewBuffer(jsonBody),
)
if err != nil {
log.Printf("Failed to create request: %s", err)
return
}
req.Header.Add("Authorization", "Bearer "+todoistToken)
req.Header.Set("Content-Type", "application/json")
resp, err := httpClient.Do(req)
if err != nil {
log.Printf("Failed to Do request: %s", err)
return
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
log.Printf("Got status code %d, expected 200 when creating task", resp.StatusCode)
bodyBytes, err := io.ReadAll(resp.Body)
if err != nil {
log.Printf("Failed to read body: %s", err)
}
log.Printf("Got body: %s", string(bodyBytes))
} else {
log.Printf("Created task '%s'", task)
}
}
func addJobs(c *cron.Cron, tasks map[inputLine]struct{}) {
for task := range tasks {
c.AddFunc(task.Schedule, func() { createTask(task.Task) })
}
}
|
