main.go (view raw)
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package main
import (
"encoding/csv"
"encoding/json"
"errors"
"flag"
"fmt"
"log"
"net/http"
"os"
"strings"
"time"
)
type Habit struct {
Time time.Time `json:"time"`
Activity string `json:"activity"`
Notes string `json:"notes,omitempty"`
}
func dateEqual(date1, date2 time.Time) bool {
y1, m1, d1 := date1.Date()
y2, m2, d2 := date2.Date()
return y1 == y2 && m1 == m2 && d1 == d2
}
func ReadTSV(fname string) ([]Habit, error) {
f, err := os.Open(fname)
if err != nil {
return nil, err
}
r := csv.NewReader(f)
r.Comma = '\t'
records, err := r.ReadAll()
if err != nil {
return nil, err
}
habits := []Habit{}
for _, record := range records {
h := Habit{}
h.Time, _ = time.Parse(time.RFC1123, record[0])
h.Activity = record[1]
if len(record) == 2 {
h.Notes = ""
} else {
h.Notes = record[2]
}
habits = append(habits, h)
}
return habits, nil
}
func getTodaysHabits(habits []Habit) []Habit {
todays := []Habit{}
for _, h := range habits {
if dateEqual(h.Time, time.Now()) {
todays = append(todays, h)
}
}
return todays
}
func (h Habit) String() string {
t := h.Time.Format(time.RFC1123)
return fmt.Sprintf(
"time: %s activity: %s notes: %s",
t,
h.Activity,
h.Notes,
)
}
func (h Habit) WriteTSV(fname string) error {
records := []string{}
f, err := os.OpenFile(fname, os.O_APPEND|os.O_WRONLY, 0644)
if err != nil {
return err
}
w := csv.NewWriter(f)
w.Comma = '\t'
t := h.Time.Format(time.RFC1123)
records = append(records, t, h.Activity, h.Notes)
if err := w.Write(records); err != nil {
return err
}
w.Flush()
if err := w.Error(); err != nil {
return err
}
defer f.Close()
return nil
}
func getKey(r *http.Request) (string, error) {
var key string
header := r.Header.Get("Authorization")
if len(header) == 0 {
return "", errors.New("missing Authorization header")
}
key = strings.Split(header, " ")[1]
return key, nil
}
func main() {
hFile := flag.String("f", "./habits.tsv", "csv file to store habit data")
secretKey := flag.String("k", "", "auth key to be passed as bearer token")
flag.Parse()
if _, err := os.Stat(*hFile); errors.Is(err, os.ErrNotExist) {
_, err := os.Create(*hFile)
if err != nil {
log.Fatalf(err.Error())
}
}
http.HandleFunc("/submit", func(w http.ResponseWriter, r *http.Request) {
h := Habit{}
key, err := getKey(r)
if err != nil {
log.Printf("error: %v\n", err)
w.WriteHeader(401)
return
}
if *secretKey != key {
log.Printf("incorrect key: %v\n", key)
w.WriteHeader(401)
return
}
json.NewDecoder(r.Body).Decode(&h)
log.Printf(h.String())
if err := h.WriteTSV(*hFile); err != nil {
log.Printf("error: %v\n", err)
w.WriteHeader(500)
return
}
w.WriteHeader(204)
})
http.HandleFunc("/today", func(w http.ResponseWriter, r *http.Request) {
key, err := getKey(r)
if err != nil {
log.Printf("error: %v\n", err)
w.WriteHeader(401)
return
}
if *secretKey != key {
log.Printf("incorrect key: %v\n", key)
w.WriteHeader(401)
return
}
habits, err := ReadTSV(*hFile)
if err != nil {
log.Printf("error: %v\n", err)
w.WriteHeader(500)
return
}
todays := getTodaysHabits(habits)
json.NewEncoder(w).Encode(todays)
return
})
http.ListenAndServe(":8585", nil)
}
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